KOPPERS INDUSTRIES INC
8-K, 1997-12-15
LUMBER & WOOD PRODUCTS (NO FURNITURE)
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<PAGE>
 
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                               ----------------
                                    FORM 8-K
                                 CURRENT REPORT
 
                        PURSUANT TO SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                        DATE OF REPORT: DECEMBER 1, 1997
                               ----------------
                            KOPPERS INDUSTRIES, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
      PENNSYLVANIA                  1-12716                 25-1588399
     (State or Other              (Commission            (I.R.S. Employer
     Jurisdiction of              File Number)        Identification Number)
     Incorporation)
 
436 SEVENTH AVENUE PITTSBURGH, PA                        15219-1800
     (Address of Principal                               (Zip code)
      Executive Offices)
  
                                 (412) 227-2001
               REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE
 
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<PAGE>
 
                           KOPPERS INDUSTRIES, INC.
                                   FORM 8-K
                               DECEMBER 1, 1997
 
ITEM 2.ACQUISITION OF ASSETS
 
      On December 1, 1997, Koppers Industries, Inc. (the "Company")
      completed the purchase of 50% of Koppers Australia Pty. Limited
      ("Koppers Australia") from the Broken Hill Proprietary Company
      Limited ("Broken Hill") for approximately $65 million, which
      increases the Company's ownership of the outstanding voting stock of
      Koppers Australia to 100%.
 
      Products and services provided by Koppers Australia are similar to
      those provided by the Company. Koppers Australia is Australia's
      largest manufacturer of carbon pitch, wood preservatives and treated
      wood products and it markets these products, as well as carbon black,
      in Australia, New Zealand and other Pacific Rim nations. Koppers
      Australia is the only coal tar distiller in Australia.
 
      The acquisition was financed as an integral part of a
      recapitalization by the Company (see Item 5).
 
      The Company intends to file audited financial statements and other
      required data within 60 days of this filing.
 
ITEM 5.OTHER EVENTS
 
      SARATOGA INVESTMENT
 
      On October 15, 1997, KAP Investments, Inc. (a wholly-owned subsidiary
      of Koppers Australia) and a group of approximately 140 stockholders,
      the majority of which are employees of the Company (the "Management
      Investors") (collectively, the "Offeree Stockholders") acquired from
      Cornerstone-Spectrum, Inc. (an affiliate of Beazer East, Inc. and
      Hanson PLC) its voting and non-voting shares of common stock of
      Koppers Industries, Inc. ("Common Stock"). The Offeree Stockholders
      utilized $52.5 million of financing from Koppers, Saratoga Partners
      III, L.P. ("Saratoga") and Saratoga Koppers Funding, Inc. ("Saratoga
      Koppers"). The Company loaned the Offeree Stockholders $17.0 million,
      and Saratoga and Saratoga Koppers loaned the Offeree Stockholders
      $35.5 million. In exchange for forgiveness of the loans provided by
      the Company, Saratoga and Saratoga Koppers, the Offeree Stockholders
      subsequently transferred 1,350,820 non-voting shares of Common Stock
      to the Company and 464,180 non-voting shares of Common Stock and
      2,117,952 voting shares of Common Stock to Saratoga and Saratoga
      Koppers (the "Saratoga Investment"). On December 1, 1997, Saratoga
      exchanged the shares of Common Stock it acquired in the Saratoga
      Investment for shares of a new series of senior convertible preferred
      stock of Koppers Industries, Inc., which entitles Saratoga to elect a
      majority of the Board of Directors of the Company (the "Board of
      Directors") and to exercise a majority of the voting power over all
      outstanding stock of Koppers Industries, Inc. with respect to all
      other matters subject to a stockholder vote.
 
      REFINANCING TRANSACTIONS
 
      On December 1, 1997, the Company completed a private placement of
      $175.0 million of 9 7/8% Senior Subordinated Notes due 2007 (the
      "Notes due 2007") and established with Swiss Bank Corporation,
      Stamford Branch and Mellon Bank, N.A. a total of $135.0 million of
      senior term loan facilities and a $140.0 million senior revolving
      credit facility ($40.0 million and $20.0 million of which was
      reserved for use by Koppers Australia in connection with a term loan
      and a revolving credit facility, respectively) (the "New Credit
      Facilities"). The proceeds from the New Credit
<PAGE>
 
      Facilities and the sale of the Notes due 2007 have been and are being
      used to complete the following transactions: (i) the acquisition of
      Broken Hill's 50% interest in Koppers Australia; (ii) the repayment
      of all of the 8 1/2% Senior Notes of Koppers Industries, Inc. due
      February 1, 2004 tendered pursuant to a tender offer and consent
      solicitation which was commenced October 20, 1997; (iii) the
      repayment of the outstanding indebtedness of approximately $88.1
      million under the Company's and Koppers Australia's term loans and
      revolving credit facilities; (iv) the redemption of 1,813,200 shares
      of non-voting Common Stock owned by APT Holdings Corporation, an
      affiliate of Mellon Bank, N.A. for $22.9 million; (v) the redemption,
      at $17.00 per share, of certain shares of Common Stock owned by
      Management Investors within sixty (60) days after compliance with
      applicable securities laws, at the election of such individuals, in
      an aggregate amount not to exceed $15.0 million; (vi) the redemption
      of 436,508 non-voting shares of Common Stock from Saratoga Koppers;
      and (vii) the payment of related fees and expenses.
 
      CLOSING OF WOODWARD, ALABAMA COKE FACILITY
 
      On December 8, 1997 the Company announced that it has decided to
      close its Woodward, Alabama coke facility located in Jefferson
      County, Alabama effective in early January 1998. This decision was
      based on continuing losses at the facility combined with the advanced
      ages of the coke oven batteries, ongoing environmental requirements
      and the need for significant capital expenditures.
 
      Closure of the Woodward coke facility is expected to result in a
      charge to earnings for the Company in the fourth quarter of 1997 of
      approximately $38.5 million.
 
      EXHIBITS
 
<TABLE>
<CAPTION>
       EXHIBIT
       NUMBER                            DESCRIPTION
       ------- ---------------------------------------------------------------
       <C>     <S>
         2.1   Agreement for Sale of Shares by and among BHP Nominees
               Investments No. 3 Pty Ltd, The Broken Hill Proprietary Company
               Limited, Koppers Industries, Inc., Koppers Australia Pty
               Limited, Continental Carbon Australia Pty Limited and Kap
               Investments, Inc.
         2.2   Variation Agreement by and among BHP Nominees Investments No. 3
               Pty Ltd, The Broken Hill Proprietary Company Limited, Koppers
               Industries, Inc., Koppers Australia Pty Limited, Continental
               Carbon Australia Pty Limited and Kap Investments, Inc.
</TABLE>
 
                                   SIGNATURE
 
      Pursuant to the requirements of the Securities Exchange Act of 1934,
      the Registrant has duly caused this report to be signed on its behalf
      by the undersigned hereunto duly authorized.
 
                                              KOPPERS INDUSTRIES, INC.
 
      Dated December 15, 1997                 By  /s/ Donald E. Davis
                                                 -----------------------------
                                                  Donald E. Davis,
                                                  Vice President and
                                                  Chief Financial Officer

<PAGE>
                                                                     Exhibit 2.1
 

                             Dated 8 October 1997





                             Agreement for Sale of
                                    Shares
                          BHP NOMINEES NO. 3 PTY LTD
                                  ("Vendor")

                                THE BROKEN HILL
                              PROPRIETARY COMPANY
                                    LIMITED
                                    ("BHP")

                           KOPPERS INDUSTRIES, INC.
                                 ("Purchaser")

                             KOPPERS AUSTRALIA PTY
                              LIMITED ("Company")

                              CONTINENTAL CARBON
                             AUSTRALIA PTY LIMITED
                            ("Continental Carbon")

                             KAP INVESTMENTS, INC.
                              ("KAP Investments")





                           Mallesons Stephen Jaques
                                  Solicitors
                               Rialto, Level 28
                              525 Collins Street
                              Melbourne Vic 3000
                              Tel: (03) 0643 4000
                              JA:RPL/BROK2129-002
<PAGE>
 
Contents           Agreement for Sale of Shares
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                   1 Interpretation                                            2
                  
                   2 Sale and purchase of Shares                               4

                   3 Purchase Price                                            4

                   4 Conditions precedent to Completion                        4

                   5 Completion                                                5

                   6 Payment of Dividend                                       6

                   7 Conduct of Business Pending Completion                    6

                   8 Separation Issues                                         8

                   9 Superannuation                                           13

                   10 Fallback Protections                                    14

                   11 Warranties & representations                            16

                   12 Costs and stamp duty                                    17

                   13 Notices                                                 17

                   14 Miscellaneous                                           18

                            Exercise of rights                                18
                            Waivers and variation                             18
                            No merger                                         18
                            Survival of indemnities                           18
                            Enforcement of indemnities                        18
                            Further assurances                                18
                            Publicity                                         18
                            Time of the essence                               19
                            Entire agreement                                  19
 
                   15 Governing law, jurisdiction and service of process      19
 
                   16 Partial execution                                       19

                   17 Counterparts                                            19

                   Annexure A

                   Annexure B

                   Annexure C

<PAGE>
 
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                         Agreement for Sale of Shares

Date:            8 October 1997


Parties:         BHP NOMINEES NO. 3 PTY LTD (ACN 006 528 678) having its
                 registered office at 600 Bourke Street, Melbourne, Victoria, 
                 3000 ("Vendor")
                 THE BROKEN HILL PROPRIETARY COMPANY LIMITED (ACN 004 028 007)
                 having its registered office at 600 Bourke Street, Melbourne,
                 Victoria, 3000 ("BHP")
                 KOPPERS INDUSTRIES, INC. of 436 Seventh Avenue, Pittsburgh, 
                 Pennsylvania ("Purchaser")
                 KOPPERS AUSTRALIA PTY LIMITED (ACN 000 566 629) having its 
                 registered office at 15 Blue Street, North Sydney ("Company")
                 CONTINENTAL CARBON AUSTRALIA PTY LIMITED (ACN 000 486 966)
                 having its registered office at 15 Blue Street, North Sydney
                 ("Continental Carbon")
                 KAP INVESTMENTS, INC. a Delaware corporation ("KAP 
                 Investments")

Recitals:

            A.   The Company has an authorised share capital of $20 million 
                 divided into:

                 (a)    6,187,500 A class shares of $1 each;

                 (b)    5,187,500 B class shares of $1 each;

                 (c)    2,183,824 C class shares of $1 each;

                 (d)    5,441,176 ordinary shares of $1 each, of which;

                 (e)    6,187,500 A class shares of $1 each;

                 (f)    6,187,500 B class shares of $1 each; and

                 (g)    2,183,824 C class shares of $1 each,

                 having been issued and credited as fully paid.

            B.   The Vendor is the registered holder and beneficial owner of all
                 the A class shares which have been issued in the capital of the
                 Company ("Shares").

            C.   The Purchaser and the Vendor have both been shareholders in the
                 Company for many years and throughout that period they have
                 each had representatives on the board of directors of the
                 Company.

            D.   BHP is the ultimate holding company of the Vendor and 
                 acknowledges entering into this agreement in consideration of
                 the Purchaser entering into this agreement.
<PAGE>
 
                                                                               2
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Operative provisions:

1   Interpretation
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    1.1   The following words have these meanings in this agreement unless the 
          contrary intention appears.

          Associated Persons means the Vendor, BHP, BHP's Related Bodies
          Corporate, Centaurus Corporate Finance Pty Limited, Mallesons Stephen
          Jaques and the directors, partners, officers, employees, agents and
          advisers of any of them.

          Business Day means a day on which trading banks are open for general 
          business in Melbourne.

          CC Operating Profit means the operating profit after tax and before 
                                                                       ------
          interest and head office expenses earned by Continental Carbon for
          ---------------------------------    
          the financial year ended 30 June 1999 calculated in accordance with
          clause 8.2(e).

          Coal Tar Contract means an agreement between BHP, Australian Iron and
          Steel Pty Limited, Koppers Coal Tar, the Company and the Purchaser in
          the terms contemplated by clause 8.5.

          Completion means settlement of the sale and purchase of the Shares in
          accordance with clause 5 and Complete has a corresponding meaning.

          Completion Date means 5 Business Days after the last to occur of the
          conditions set out in clause 4 or any other date agreed by the Vendor
          and the Purchaser.

          Cornerstone mans Cornerstone-Spectrum, Inc. of 1 Oxford Centre, Suite
          3000 Pittsburgh.

          KII Stockholders' Agreement means the agreement originally dated 28
          December 1988 (as subsequently amended) between the Purchaser, KAP
          Investments and others.

          Koppers Coal Tar means Koppers Coal Tar Pty Limited (ACN 003 947 699).

          Management Investors means the management investors within the meaning
          of the KII Stockholders' Agreement as at the date of this agreement.

          Profit Shortfall has the meaning given in clause 8.2(c).

          Related Body Corporate of a body corporate means another body
          corporate which as at the date of this agreement is related to the
          first within the meaning of section 50 of the Corporations Law.

          Saratoga means Saratoga Partners III, L.P.

          Saratoga Commitment Letter means the commitment letter from Saratoga
          to each of the Purchaser, Management Investors and KPA Investments in
          the form of Annexure C.

          Shares means the 6,187,500 A class shares of $1 each issued in the
          capital of the Company agreed to be sold under this agreement and
          Share means any one of those shares.

<PAGE>
 
                                                                               3
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          South Pacific Tyres means the partnership known as South Pacific Tyres
          between the Pacific Dunlop group and the Goodyear group.

          SPT Compensation Amount has the meaning given in clause 8.2(b).

          Steelworks Site means all the land at Newcastle presently owned or
          occupied by BHP or any of its Related Bodies Corporate used currently
          in connection with the manufacturing and processing of iron and steel.

          Warranties means the warranties and representations in this agreement,
          including clause 11.

     1.2  In this agreement unless the contrary intention appears:

          (a)  a reference to a clause, schedule, annexure or appendix is a 
               reference to a clause of or schedule, annexure or appendix to
               this agreement and references to this agreement include any
               recital, schedule, annexure or appendix;

          (b)  a reference to this agreement or another instrument includes any 
               variation or replacement of either of them;

          (c)  a reference to a statute, ordinance, code or other law includes 
               regulations and other instruments under it and consolidations,
               amendments, re-enactments or replacements of any of them;

          (d)  the singular includes the plural and vice versa;

          (e)  the word person includes a firm, a body corporate, an 
               unincorporated association or an authority;

          (f)  a reference to a person includes a reference to the person's
               executors, administrators, successors, substitutes (including,
               but not limited to, persons taking by novation) and assigns;

          (g)  an agreement, representation or warranty in favour of two or more
               persons is for the benefit of them jointly and severally;

          (h)  an agreement, representation or warranty on the part of two or 
               more persons binds them jointly and severally;

          (i)  if a period of time is specified and dates from a given day or 
               the day of an act or event, it is to be calculated exclusive of
               that day;

          (j)  a reference to a day is to be interpreted as the period of time 
               commencing at midnight and ending 24 hours later; and
       
          (k)  all references to dollars and "$" are references to Australian 
               currency

     1.3  Headings are inserted for convenience and do not affect the 
          interpretation of this agreement.
<PAGE>
 
                                                                               4
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2   Sale and purchase of Shares
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    2.1  The Vendor agrees to sell and transfer the Shares to the Purchaser and 
         the Purchaser agrees to purchase the Shares from the Vendor on the
         terms and conditions of this agreement.

    2.2  The Shares must be transferred free from any mortgage, charge, lien, 
         pledge or other encumbrance and with all rights, including dividend
         rights, attached or accruing to them on and from the date of this
         agreement, other than the dividend referred to in clause 6.

3   Purchase Price
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         Subject to clause 6.3, the consideration payable for the Shares is $70 
         million.
 
4   Conditions precedent to Completion
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    4.1  Completion is conditional on:

         (a)  the Treasurer of the Commonwealth of Australia consenting, under 
              the Foreign Acquisitions and Takeovers Act 1975, to the proposed
              acquisition by the Purchaser of the Shares and the Treasurer is to
              be deemed to have so consented:

              (i)  if the Purchaser receives written advice from the Treasurer 
                   or on his behalf, without any term or condition which the
                   Purchaser considers unacceptable, to the effect that the
                   acquisition of the Shares is not objected to under the
                   Foreign Acquisitions and Takeovers Act 1975; or

              (ii) if ten days have elapsed from the day the Treasurer ceased to
                   be empowered to make any order under Part II of the Foreign
                   Acquisitions and Takeovers Act in relation to the proposed
                   acquisition because of lapse of time, notice of the proposed
                   acquisition of the Shares having been given to the Treasurer
                   under the Foreign Acquisitions and Takeovers Act 1975;

         (b)  the Purchaser arranging financing on terms reasonably satisfactory
              to it to fund the purchase of the Shares.

    4.2  Each of the parties must use all reasonable endeavours and shall each 
         co-operate with the others to obtain the fulfilment of the conditions
         in clause 4.1, in particular the fulfilment of clause 4.1(a), before 28
         November 1997.

    4.3  The Purchaser acknowledges that immediately prior to execution of this 
         agreement SBC Warburg Dillon Read Inc. provided a letter addressed to
         the Purchaser confirming that it was highly confident of its ability to
         procure finance for the Purchaser on terms that had been previously
         disclosed to the Purchaser and which the Purchaser acknowledges would
         satisfy the conditions set out in clause 4.1(b). A copy of that letter
         is attached as Annexure A. The Purchaser acknowledges that if financing
         is available on terms no less favourable to those set out in Annexure
         B, the condition set out in clause 4.1(b) will be satisfied. SBC
         Warburg Dillon Read Inc. will be the preferred provider of financing to
         the Purchaser. However, if SBC Warburg Dillon Read Inc. does not
         provide financing to the Purchaser, BHP may







<PAGE>
 
                                                                               5
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          procure alternative sources of finance for the Purchaser and provided
          the terms upon which that finance is made available to the Purchaser
          are no less favourable than the terms set out in Annexure B, the
          condition in clause 4.1(h) will be deemed to be satisfied.

     4.4  If:

          (a)  any of the conditions in cause 4.1 are not fulfilled by 22 
               January 1998 or a later date agreed on by the Vendor and the
               Purchaser; or

          (b)  any consent or approval required under any of those conditions is
               not granted on terms reasonably acceptable to the Purchaser.

          then, if the party who seeks to avoid the agreement has completed with
          clause 4.2, the provisions of this agreement relating to the sale of
          the Shares may be terminated at any time before Completion by notice
          given by the Purchaser or the Vendor to the other of them.

     4.5  If the provisions of the agreement relating to the sale of the Shares 
          are terminated under clause 4.4 then, the provisions in clauses 10,
          11, 12, 13, 14, 15 and 16 remain in full force and effect and while
          the Vendor and the Purchaser are released from their obligations in
          relation to the sale and purchase of the Shares each party retains the
          rights it has against any other party in respect of any past
          breaches.

5.  Completion
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    5.1   Completion of the sale and purchase of the Shares will take place at 
          11:00 a.m. on the Completion Date at the offices of BHP at 600 Bourke
          Street, Melbourne, Victoria or such other time and place as the Vendor
          and the Purchaser may agree.

    5.2  Immediately prior to Completion (or at any earlier time agreed between 
         the Purchaser and the Vendor) the Company must pay a dividend as
         contemplated by clause 6.

    5.3  The Vendor agrees to do the following on Completion:

         (a)  deliver to the Purchaser or its solicitors executed transfers in 
              favour of the Purchaser of all the Shares together with the share
              certificates for the Shares and any consents that the Purchaser
              reasonably requires; and

         (b)  cause:

              (i)  the board of directors of the Company to direct that, subject
                   to the payment of stamp duty, the transfers of the Shares
                   be registered;

              (ii)  subject to the articles of association of the Company, the 
                    appointment to the board of directors of the Company of the
                    Purchaser's nominees and the resignation from those boards,
                    on terms approved by the Purchaser, of those directors
                    presently representing the Vendor but so that a properly
                    constituted board of directors is in existence at all times.

     5.4  The Purchase agrees to pay to the Vendor at Completion the purchase 
          price for the Shares by bank cheque or other immediately available
          funds.
<PAGE>
 
                                                                               6
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    5.5  On or before Completion BHP, the Company and the Purchaser must
         enter into and the Purchaser must procure Koppers Coal Tar to enter
         into the Coal Tar Contract as contemplated by clause 8.5.

    5.6  If necessary, the Purchaser and the Vendor must procure the consent
         of the C class shareholder in the Company to the transfer of the
         Shares.

    5.7  Each of the matters required to be done under this clause 5 are
         interconnected and interconditional matters to be carried out as
         close to contemporaneity as is practicable but in any event on or
         before Completion. Completion is dependent upon fulfilment of this
         clause 5.7.


6   Payment of Dividend
- --------------------------------------------------------------------------------
    6.1  The Purchaser and the Vendor agree that prior to Completion they
         will cause the board of directors of the Company, on a date not
         later than the day before the payment of the dividend, to declare
         a dividend on the terms set out below and to procure the Company
         prior to Completion to pay that dividend.

              "Resolved, in accordance with the Company's articles of
              association, to declare an interim dividend totalling $40 million,
              payable in equal parts to the A class and B class shareholders
              of the Company registered as such on the date of the resolution,
              credited as fully franked".

    6.2  The Purchase must support the procurement of the necessary funding
         to enable the Company to pay the dividend required to be paid under
         clause 6.1.

    6.3  If no dividend is received by the Vendor or the dividend received
         by the Vendor is less than $20 million, the purchase price will
         be increased by the amount of the shortfall.


7   Conduct of Business Pending Completion
- --------------------------------------------------------------------------------
    7.1  Until Completion, the Vendor and Purchaser agree that the Company
         and its Related Bodies Corporate will continue to carry on business
         in accordance with current management plans and budgets for the
         1997/1998 financial year of the Company.

    7.2  The Purchaser, the Vendor and the Company agree to procure the exercise
         of pre-emptive rights held by KAP Investments under the KII
         Stockholders' Agreement in relation to a seller's notice dated 29
         September 1997 given by Cornerstone ("Seller's Notice"). The exercise
         of those pre-emptive rights will be implemented in the following
         manner:

         (a)  Saratoga has issued the Saratoga Commitment Letter to the
              Purchaser, KAP Investments and Management Investors.

         (b)  KAP Investments and Management Investors will issue a joint
              acceptance notice of the Seller's Notice to acquire all the
              stock currently held by Cornerstone in the Purchaser on or
              before 8 October 1997.

         (c)  Saratoga will lend US $35.5 million, and the Purchaser will
              lend US$17,020,328, to Pittsburgh Acquisition Inc.
<PAGE>
 
                                                                               7
- --------------------------------------------------------------------------------
         (d)  On the closing of the transaction referred to in 7.2(b), a bank 
              wire transfer will be made to Cornerstone in the amount of
              US$52,520,328. In return, Cornerstone will deliver to Management 
              Investors and KAP Investments the necessary stock certificates and
              three blank stock powers relating to the stock referred to in 
              7.2(b).

         (e)  On receipt of the stock certificates and stock powers referred to 
              in 7.2(d), one stock power will be executed in favour of the 
              Purchaser for 1,350,820 non-voting shares in the Purchaser in 
              repayment of the Purchaser's loan to Pittsburgh Acquisition Inc 
              referred to in clause 7.2(c). The remaining two stock powers will 
              be used to transfer 2,117,952 voting shares and 464,180 non-voting
              shares in the Purchaser to Saratoga, in repayment of Saratoga's 
              loan to Pittsburgh Acquisition Inc. referred to in clause 7.2(c),
              to be held in escrow pending completion of the necessary 
              notification filing under the Hart Scott Rodino Anti-Trust 
              Improvements Act of 1976 ("HSR Act"). After the necessary 
              approvals have been obtained under the HSR Act, the escrow agent
              will transfer the 2,117,952 voting shares and 464,180 non-voting
              shares in the Purchaser to Saratoga.

         (f)  At the conclusion of the steps set out in clause 7.2(a) - (e),
              the Purchaser will have four shareholders being KAP Investments,
              Saratoga, Management Investors and Mellon Bank Corporation through
              its wholly owned subsidiary APT Holdings Corporation. At no time
              during the steps outlined under this clause 7.2 will any party
              acquire a beneficial interest in more than 50% of the voting stock
              in the Purchaser for the purposes of the KII Stockholders' 
              Agreement.

    7.3  In relation to the exercise of pre-emptive rights contemplated by
         clause 7.2, the Purchaser makes the following representations and
         warranties to the Vendor, BHP, the Company and through the Company to
         KAP Investments:

         (a)  The steps set out in clause 7.2 are a complete and accurate
              description of the transactions contemplated in relation to the
              stock in the Purchaser the subject of the Seller's Notice.

         (b)  All necessary consents and authorities have been obtained by the
              Purchaser and all of its Related Bodies Corporate in order to
              enter into and give effect to the transactions contemplated in
              clause 7.2.

         (c)  Mellon Bank Corporation, (which through its wholly-owned 
              subsidiary APT Holdings Corporation, is a stockholder in the
              Purchaser and in its own right is a creditor of the Purchaser)
              has been fully informed of all material matters in relation to the
              transactions contemplated by this agreement.

         (d)  Mellon Bank Corporation has informed the Purchaser that it will 
              not (through its wholly owned subsidiary APT Holdings Corporation)
              exercise its pre-emptive rights in respect of the stock in the 
              Purchaser the subject of the transactions contemplated in
              clause 7.2.

         (e)  The Purchaser has available to it the necessary funds to enable it
              to lend Pittsburgh Acquisition Inc. US$17,020,328.

         (f)  The entry into and performance of the various arrangements 
              contemplated by clause 7.2 will not constitute a breach of any
              obligation (including any
<PAGE>
 
                                                                               8
- --------------------------------------------------------------------------------
              statutory, contractual or fiduciary obligations) or default under 
              any agreement or undertaking by the Purchaser or the Management
              Investors.

    7.4  In agreeing to carry out the steps referred to in clause 7.2, KAP
         Investments has relied on the Saratoga Commitment Letter.


8   Separation Issues
- --------------------------------------------------------------------------------
    8.1  Operation

         The provisions of this clause 8 apply after Completion. If Completion
         does not occur the provisions of this clause 8 do not come into effect.

    8.2  South Pacific Tyres Contract

         (a)  Continental Carbon is presently seeking to secure a contract with
              South Pacific Tyres to supply 100% of the South Pacific Tyres'
              carbon black requirements. Continental Carbon has forecast $2.909
              million as the CC Operating Profit. If Continental Carbon does not
              obtain a contract to supply 100% of the carbon black requirements
              of South Pacific Tyres, BHP has agreed to compensate Continental
              Carbon for lost profits in accordance with this clause 8.2.

         (b)  The SPT Compensation Amount is an amount equal to 6 times the
              Profit Shortfall during the financial year of the Company ending
              30 June 1999 up to a maximum of $11 million.

         (c)  The Profit Shortfall is an amount equal to the lesser of:

              (i)  the amount, if any, by which the CC Operating Profit is
                   reduced by reason of Continental Carbon's failure to obtain
                   the contract with South Pacific Tyres after mitigation in
                   accordance with clause 8.2(d);

              (ii) the amount, if any, by which the CC Operating Profit is less
                   than $2.909 million.

         (d)  Each of Continental Carbon, the Company and the Purchaser must
              use reasonable endeavours to seek to obtain the contract to
              supply 100% of the carbon black requirements of South Pacific
              Tyres. If, notwithstanding the exercise of reasonable endeavours,
              Continental Carbon does not obtain that contract, each of
              Continental Carbon, the Company and the Purchaser must use
              reasonable endeavours to minimise the reduction in the CC
              Operating Profit attributable to the failure of Continental Carbon
              to conclude that contract by arranging for alternative supply
              contracts with other purchasers.

         (e)  In calculating the CC Operating Profit and in calculating the
              amount, if any, by which that CC Operating Profit has been reduced
              by reason of Continental Carbon's failure to obtain the contract
              with South Pacific Tyres, the same accounting policies and
              principles as those used by the management of the Company in
              preparing the revised 3 year budget for the Company and its
              Related Bodies Corporate dated 5 September 1997 should be applied.
              In particular, no allowance should be made for any head office or
              corporate expenses or interest so that the CC Operating Profit is
              calculated by reference to the gross revenues of Continental 
              Carbon less cost of goods sold,
<PAGE>
 
                                                                               9
- --------------------------------------------------------------------------------
              administrative expenses directly attributable to Continental 
              Carbon, depreciation and tax.

         (f)  BHP must pay the SPT Compensation Amount, if any, to Continental
              Carbon on 30 September 1999.

    8.3  Steelwork Site facilities

         (a)  At present, the Company has storage, discharge, pipeline and
              loading facilities situated on the Steelworks Site. BHP has 
              announced its intention to close its steel making activities in
              Newcastle and is currently examining proposals for the 
              redevelopment of the Steelworks Site. As part of the redevelopment
              of the Steelworks Site, BHP may wish to deal with the site in a 
              way which would require the removal or relocation of various
              storage, discharge, pipeline or loading facilities currently used
              by the Company.

         (b)  The Company and the Purchaser acknowledge that BHP is free to
              deal with the Steelworks Site (including by way of sale or 
              redevelopment) in such manner as it sees fit and, if requested by 
              BHP, the Company must remove or relocate all or part of the 
              various storage, discharge, pipeline or loading facilities 
              currently used by it that are situated on the Steelworks Site.

         (c)  Without limiting the discretion BHP has as to the manner in which
              it deals with the Steelworks Site, BHP agrees to co-operate with
              the Company to minimise the capital expenditure which the Company
              needs to incur as a result of that dealing in connection with
              relocating its storage, discharge, pipeline or loading facilities
              at the Steelworks Site and to the extent that the Company
              reasonably incurs such capital expenditure exceeding A$6.5million,
              BHP agrees to pay to the Company 50% of such excess.

         (d)  BHP's maximum liability under paragraph 8.3(c) is A$9 million.

         (e)  BHP's liability under paragraph 8.3(c) only applies in relation to
              capital expenditure incurred and claimed within 5 years from the
              Completion Date.

    8.4  Claims Procedure

         (a)  Continental Carbon and the Company must each provide BHP with any
              information it reasonably requests in connection with matters
              relevant to clauses 8.2 or 8.3.

         (b)  If either the Company or Continental Carbon at any time anticipate
              that there is a possibility they will make a claim under either
              clauses 8.2 or 8.3 they must notify BHP as soon as practicable,
              provide BHP with all material information lawfully able to be
              disclosed so that BHP is able to make an informed assessment of
              the matter and then, if practicable, consult with BHP in order to
              minimise the amount of any claim which might otherwise arise under
              clauses 8.2 or 8.3. Without limiting the generality of this
              requirement to consult, where practicable the Company must give
              BHP reasonable prior written notice of any plans for the 
              relocation of its storage discharge, pipeline or loading 
              facilities at the Steelworks Site and the Company must, where
              practicable, consult with BHP prior to incurring any capital
              expenditure in relation to any of those items.
<PAGE>
 
                                                                              10
- --------------------------------------------------------------------------------
         (c)  A claim under clauses 8.2 or 8.3 must be accompanied by a detailed
              explanation of the circumstances giving rise to the claim giving a
              full breakdown of all calculations of amounts involved in the 
              claim, providing copies of all supporting invoices and records and
              giving particulars of all steps taken by either Continental Carbon
              or the Company to minimise the amount of that claim.

         (d)  As soon as a formal claim for compensation is made under clauses
              8.2 or 8.3 BHP and the relevant party making the claim must meet
              together to review the claim and agree on the amount payable by
              BHP. Any undisputed item of a formal claim must be paid by BHP
              within 30 days after the amount payable for that item is agreed
              (but in the case of a payment of a claim under clause 8.2, not
              before 30 September 1999). If a dispute relating to issues of fact
              arises out of or related to one or more items of any claim made
              under clauses 8.2 or 8.3, the dispute in respect of the relevant
              item or items shall be submitted to expert determination 
              administered by and in accordance with the Rules for Binding 
              Expert Determination of the Australian Commercial Disputes Centre,
              New South Sales ("ACDC") within 60 days of the dispute arising. In
              the absence of manifest error, the parties agree to accept the
              determination of the expert as final and binding. The expert shall
              be a person agreed between the parties. ACDC will assist the
              parties by providing a list of suggested experts. Failing 
              agreement, the expert shall be a person appointed by ACDC. BHP and
              the relevant party agree to pay in the proportions determined by
              ACDC the costs and expenses of the expert in connection with the
              references. The expert will be appointed as an expert and not as
              an arbitrator. The procedures for determination are to be decided
              by the expert in their absolute discretion. BHP and the relevant
              party must ensure that the terms of appointment of the expert
              require them to make a determination in relation to the matters 
              the subject of the reference to them within 90 days of their
              appointment.

    8.5  Coal Tar Contract

         On or before Completion BHP, the Company, Koppers Coal Tar and the
         Purchaser will enter into a contract for BHP to supply and the Company
         to purchase 100% of BHP's available Australian coal tar to the extent
         that BHP continues to produce coal tar in Australia. The terms of the
         Coal Tar Contract will be substantially the terms currently being
         negotiated between the Company or Koppers Coal Tar and the integrated
         steel division of BHP Steel and must include the following:

         (a)  there will be no naphthalene price adjustment;

         (b)  the provisions dealing with the relevant facilities at the
              Steelworks Site will be made subject to and consistent with the
              provisions set out in clause 8.3;

         (c)  the new prices contemplated by the draft agreement will apply from
              1 September 1997;

         (d)  the supply agreement will be for a 12 year term with provision
              for extension as currently negotiated;

         (e)  other operational issues that are currently being negotiated
              locally will be finalised;
<PAGE>
 
                                                                              11
- --------------------------------------------------------------------------------
          (f)  the Company and the Purchaser must each guarantee the obligations
               of Koppers Coal Tar under the Coal Tar Contract;

          (g)  BHP and the Purchaser must each use reasonable endeavours to 
               procure the form of the Coal Tar Contract is agreed and settled
               between the relevant parties as soon as possible after execution
               of this agreement.

     8.6  Insurance

          The Purchaser acknowledges that it will be necessary following 
          Completion for the Company to effect new insurance in respect of its
          assets and liability rather than rely on any BHP, umbrella or
          sponsored policies currently in place.

     8.7  Superannuation

          The Purchaser also acknowledges that the Company will be required to
          establish or nominate a superannuation fund or funds in accordance
          with the provisions contemplated by clause 9 on or before Completion.

     8.8  Other Separation Items

          The parties recognise that since the time of the establishment of the
          Company in 1967 there have been many dealings and arrangements between
          BHP and its Related Bodies Corporate and the Company and its Related
          Bodies Corporate. The parties will work together in good faith to
          adjust and vary those commercial arrangements so, where appropriate,
          they are withdrawn or otherwise they are placed on commercial arms
          length terms and in doing so will use reasonable endeavours to
          minimise the disruption to the businesses of the Company and its
          Related Bodies Corporate. Without limiting the generality of the
          foregoing, BGP will withdraw the letter of comfort it has currently
          provided in relation to the borrowing facilities of the Company.

     8.9  SEEP & KEEPP

          The Purchaser acknowledges that the Company will be solely responsible
          for the ongoing management or dismantling of the existing employee
          incentive schemes that operate in relation to the Company and its
          Related Bodies Corporate.

     8.10  No other responsibilities

           (a)  The Purchaser and the Company acknowledge and agree that except 
                as set out in this agreement or pursuant to any other express
                written agreements, neither BHP nor any Associated Person will
                have any obligations, liabilities or responsibilities for or in
                connection with the operation or business of the Company or any
                of its Related Bodies Corporate to the Purchaser, the Company or
                any of its Related Bodies Corporate at any time on or after
                Completion.

          (b)  Without limiting the generality of clause 8.10(a), neither BHP 
               nor any Associated Person will have any obligation, liability or
               responsibility to the Purchaser, the Company or any of its
               Related Bodies Corporate in connection with any contamination of
               land or pollution of the environment which has occurred in the
               conduct of the business or operations of the Company or any of
               its Related Bodies Corporate and neither BHP nor any Associated
               Person will have any obligations, liabilities or responsibilities
               to the Purchaser, the
<PAGE>
 
                                                                              12
- --------------------------------------------------------------------------------
               Company or any of its Related Bodies Corporate in connection with
               the clean-up or decontamination of any such pollution or
               contamination.

          (c)  The Company must indemnify BHP and the Associated Persons for all
               losses, costs and expenses or other moneys payable by them in
               connection with any environmental claims (including any claims
               for clean-up or decontamination of land) brought against BHP or
               any Associated Person in connection with the operations or
               businesses of the Company or any its Related Bodies Corporate and
               arising by reason of the Vendor's shareholding in the Company or
               by reason of the appointment of any Associated Person as a
               director or officer of the Company or any of its Related Bodies
               Corporate at any time prior to Completion. For the purposes of
               clause 8.10(a), (b) or (c) "Associated Persons" does not include
               Mallesons Stephen Jaques or Centaurus Corporate Finance Pty
               Limited.

          (d)  The Purchaser and the Company agree to be bound by the following 
               provisions for the period of 4 years following Completion:

               (i)  The total consolidated indebtedness of the Company and its 
                    Related Bodies Corporate ("KAP Group") after netting off any
                    cash or bank deposits ("Net Debt") must not exceed
                    $100,000,000.

               (ii)  All borrowings or financial indebtedness of the KAP Group 
                     must be on market terms.
             
               (iii)  All dealings between any member of the KAP Group, on the 
                      one hand, and the Purchaser or any of the Purchaser's
                      Related Bodies Corporate other than a member of the KAP
                      Group ("KII Group"), on the other, must be on arms length
                      terms.

               (iv)  The assets and undertakings of the KAP Group must be 
                     maintained with the Company as the holding company and the
                     Purchaser and the Company must use reasonable endeavours to
                     maintain and enhance the value of those assets and
                     undertakings.

               (v)   Any sale of assets by any member of the KAP Group must be 
                     for fair market value with the proceeds used either to
                     reduce Net Debt or for reinvestment in the assets and
                     undertakings of the KAP Group.


          (e)  The parties acknowledge that nothing in the clause 8.10 imposes 
               any obligation on the part of the Purchaser to indemnify BHP or
               any Associated Person in respect of any claim brought against BHP
               or any Associated Person in respect of any claim brought against
               BHP or any Associated Person whether such claim is brought in
               respect of any environmental matter (including any claim for
               clean-up or decontamination of land) or in respect of any other
               matter, fact or circumstance whatsoever.
<PAGE>
 
                                                                              13
- --------------------------------------------------------------------------------
     8.11  Override clause

           To the extent that the provisions of any other arrangements or
           agreements between the Company or any of its Related Bodies Corporate
           and BHP or any of its Related Bodies Corporate are inconsistent with
           any of the provisions of this agreement, the provisions of this
           agreement prevail and the Company and BHP must procure that those
           arrangements or agreements are amended to reflect the relevant
           provisions of this agreement but must do so in accordance with clause
           8.8.

9   Superannuation
- --------------------------------------------------------------------------------
     9.1  In this clause 9 the following words have these meanings:

          Accumulation Fund means the accumulation fund described in Part 10 of
          Division B of the governing rules of the BHP Superannuation Fund.

          BHP Superannuation Fund means the superannuation fund established by
          trust deed dated 1 July 1926.

          Defined Benefit Fund means the defined benefit fund described in Part
          1 of Division B of the governing rules of the BHP Superannuation Fund.

          Payment Date means the date that is fourteen days after the date on
          which the Transfer Value is calculated under clause 9.4.

          Purchaser's Fund has the meaning given in clause 9.2.

          Transfer Value is an amount equivalent to the aggregate of the normal
          leaving service benefit vested in the Transferring Members on the
          Completion Date being:

          (a)  for members of the Defined Benefit Fund, the Members' Reserves
               as at the Completion Date as defined in Rule B1.2 of Part 1 of
               Division B of the governing rules of the BHP Superannuation Fund,
               and

          (b)  for members of the Accumulation Fund, the balance in their
               accumulation accounts as at the Completion Date determined in
               accordance with Part 10 of Division B of the governing rules of
               the BHP Superannuation Fund.

          Transferring Members means the employees of the Company or any
          Subsidiary who are, at the Completion Date, members of the BHP
          Superannuation Fund, and who accept the Purchaser's invitation to
          transfer to the Purchaser's Fund under clause 9.2.

     9.2  On, or before the Completion Date, the Purchaser must establish or
          identify one or more superannuation funds ("Purchaser's Fund") which:

          (a)  are complying funds for the purposes of the Supervision Industry
               (Supervision) Act 1933 and the Income Tax Assessment Act 1936;
               and

          (b)  will provide benefits to the Transferring Members on terms which
               are no less generous than those of the Accumulation Fund or the
               Defined Benefit Fund (as the case may be) as at the Completion
               Date,
<PAGE>
 
                                                                              14
- --------------------------------------------------------------------------------
          and will invite employees of the Company or any Subsidiary who are 
          members of the BHP Superannuation Fund at the Completion Date to join
          the Purchaser's Fund with effect from the Completion Date.

     9.3  An employee of the Company or any Subsidiary who is, at the Completion
          Date, a member of the BHP Superannuation Fund and who does not accept
          the Purchaser's invitation to transfer to the Purchaser's Fund under
          clause 9.2 will be dealt with in accordance with the governing rules 
          of the BHP Superannuation Fund.

     9.4  As soon as practicable after the Completion Date, the Vendor must 
          cause the Transfer Value to be calculated as at that date in respect
          of the Transferring Members.

     9.5  The Vendor must do all things within its power to facilitate the 
          payment or transfer of the Transfer Value from the BHP Superannuation 
          Fund to the trustees of the Purchaser's Fund on the Payment Date 
          together with interest on that amount from the Completion Date to the
          Payment Date at the BHP Superannuation Fund's interim rate as
          determined in accordance with the governing rules of the BHP
          Superannuation Fund in respect of that period. The Transfer Value must
          be paid or transferred in cash unless the trustee of the BHP 
          Superannuation Fund and the trustees of the Purchaser's Fund agree 
          that other assets are to be transferred. The Transfer Value may be
          paid or transferred in one or more instalments by the trustee of the
          BHP Superannuation Fund at its discretion.

     9.6  For the avoidance of doubt, the Purchaser and the Company acknowledge 
          that, in calculating the Transfer Value under clause 9.4, the Vendor
          is not obliged to procure that the trustee of the BHP Superannuation
          Fund pays or transfers to the trustee of the Purchaser's Fund any
          element of surplus which may currently exist in relation to the BHP
          Superannuation Fund.

     9.7  The Vendor agrees to do all things within its power (subject to any
          restrictions imposed by law) to ensure that, both before and after the
          Completion Date, the Purchaser and the trustees of the Purchaser's
          Fund and any actuary appointed by either of them are provided with all
          records and information which they may reasonably require in order to
          enable them to take over responsibility for and administer the
          superannuation arrangements for Transferring Members. This obligation
          extends to any records, information or systems which are recorded,
          maintained or otherwise dependent on any computerised or similar
          system or service.

10   Fallback Protections
- --------------------------------------------------------------------------------
     10.1 If Completion does not occur by 31 January 1998, the Purchaser must 
          exercise reasonable endeavours to support an initial public offering
          of shares in the Company in Australia within the shortest practicable
          timeframe should BHP indicate to the Purchaser that it wishes to
          implement such a public offering of shares.

     10.2 Prior to Completion and, if Completion does not occur prior to 31
          January 1998, so long as the Vendor remains a shareholder in the
          Company the Purchaser agrees:

          (a)  except for the redemption or repurchase of management stock prior
               to 31 December 1998 in accordance with the provisions of the KII
               Stockholders' Agreement and except as expressly contemplated by
               clause 7, the Purchaser will not buy back shares from or redeem
               shares of or facilitate or in any way assist the exit of any
               stockholder in the Purchaser including Saratoga;
<PAGE>
 
                                                                              15
- --------------------------------------------------------------------------------
          (b)  if any stockholder in the Purchaser gives a sale notice pursuant 
               to the provisions of the KII Stockholders' Agreement, the
               Purchaser must, at BHP's request, support the exercise by KAP
               Investments of all or any pre-emptive rights it holds under the
               KII Stockholders' Agreement by voting in the appropriate manner
               or instructing its nominee director to vote in the appropriate
               manner;

          (c)  if any person makes an offer to KAP Investments to purchase the
               stock it holds in the Purchaser as contemplated by clause 2.4 of
               the KII Stockholders' Agreement or if circumstances are such that
               KAP Investments has rights it may exercise under clause 8.4 of
               the KII Stockholders' Agreement, the Purchaser must, at BHP's
               request, support the exercise by KAP Investments of any of its
               rights arising under the KII Stockholder's Agreement by voting in
               the appropriate manner or instructing its nominee directors to
               vote in the appropriate manner.

          (d)  except with the consent of all its stockholders including KAP
               Investments, the Purchaser must not issue any securities (or
               rights or options to acquire any such securities) of any nature
               having any equity participation or voting rights other than on a
               pro rata basis among its stockholders from time to time;

          (e)  if the Purchaser does offer any new securities to its 
               stockholders in accordance with the provisions of paragraph
               10.2(d), the Purchaser must, at BHP's request, support KAP
               Investments taking up all or part of its entitlement to those
               securities by voting in the appropriate manner or instructing its
               nominee director to vote in the appropriate manner;

          (f)  subject to meeting redemption obligations in connection with 
               stock held by management which apply up until 31 December 1998
               under the KII Stockholders' Agreement and subject to compliance
               with banking covenants and meeting reasonable standards of
               commercial prudence, the Purchaser must maximise the payment of
               dividends to its stockholders;

          (g)  the Purchaser must co-operate with the Vendor and BHP to ensure
               that all of the voting, control and other rights held by KAP
               Investments in relation to the Purchaser arising either under the
               KII Stockholders' Agreement or by reason of KAP Investments'
               stockholding in the Purchaser (including, without limiting the
               generality of the foregoing, the rights held by KAP Investments
               to appoint a Director of the Purchaser) must be exercised at the
               direction of BHP and the Vendor;

          (h)  the Purchaser must not agree to any variation in the KII 
               Stockholders' Agreement or any other constituent document
               affecting the rights of KAP Investments as a stockholder in the
               Purchaser including, without limitation, alter the corporate
               structure of the Purchaser through merger, liquidation,
               reorganisation or restructuring, without the prior consent of
               BHP;

          (i)  the Purchaser must not incur indebtedness for borrowed money,
               other than in the ordinary course of business, or guarantee
               indebtedness, or make any loans, advances or contributions to any
               third party, without the prior consent of BHP;

          (j)  the Purchaser must not take any actions to accelerate any 
               material existing indebtedness, except as is contemplated by this
               agreement or the transactions contemplated hereby.
<PAGE>
 
                                                                              16
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     10.3 For the avoidance of doubt where reference is made in clause 10.2 to
          the Purchaser "voting in the appropriate manner or instructing its
          nominee directors to vote in the appropriate manner" the Purchaser
          must ensure that it exercises whatever rights it has as a shareholder
          in the Company so that the Company exercises its rights as the
          holding company of KAP Investments in order to ensure KAP Investments
          exercises its respective rights in the manner requested by BHP.


11   Warranties & representations
- --------------------------------------------------------------------------------
     11.1 The Vendor and BHP represent and warrant to the Purchaser that each of
          following statements is accurate on the date of this agreement:

          (a)  The Vendor is the registered holder and beneficial owner of the
               Shares.

          (b)  There are no mortgages, charges, pledges, liens, encumbrances or
               other security interests over or affecting the Shares.

          (c)  The Vendor has the power to enter into and perform this agreement
               and has obtained all necessary consents to enable it to do so.

          (d)  The entry into and performance of this agreement by the Vendor
               does not constitute a breach of any obligation (including any
               statutory, contractual or fiduciary obligation), or default under
               any agreement or undertaking, by which the Vendor is bound.

          (e)  No voluntary arrangement has been proposed or reached with any
               creditors of the Vendor. The Vendor is able to pay its debts as
               and when they fall due.

          (f)  No meeting has been convened or resolution proposed, or petition
               presented, and no order has been made, for the winding-up of the
               Vendor. No voluntary arrangement has been proposed or reached
               with any creditors of the Vendor. The Vendor is able to pay its
               debts as and when they fall due.

          (g)  There are no options or agreements (whether exercisable now or in
               the future and whether contingent or otherwise) which entitle any
               person to create or require to be created any third party 
               interest of any nature whatsoever over any of the Shares.

     11.2 Each of the parties to this agreement represents and warrants to each
          other that they have the relevant power required to enter into and
          perform this agreement and they have obtained all necessary consents
          and authorities to enable them to do so (other than the consents and
          authorisations referred to in clauses 4 and 5.3(a)). Each party
          further represents and warrants to each other that the entering into
          and performance of this agreement by them does not constitute a breach
          of any obligation (including any statutory, contractual or fiduciary
          obligation) or the fault by them under any agreement or undertaking by
          which they are bound.

     11.3 The Purchaser, the Company and Continental Carbon each acknowledge
          that in entering into this Agreement they have relied and will rely
          entirely on their own enquiries in relation to the affairs of the
          Company and its Related Bodies Corporate and, without limitation, they
          have not relied on and will not rely on either:

          (a)  any representation or warranty that are express or implied,
               written, oral, collateral, statutory or otherwise (including,
               without limitation, under Part 5 of the Trade Practices Act
               1974, the Fair Trading Act of the various Australian
<PAGE>
 
                                                                              17
- --------------------------------------------------------------------------------
               states and territories and the Corporations Law) as to the 
               affairs of the Company and its Related Bodies Corporate or their
               prospects, from any Associated Person, or

          (b)  any information in any way relating to the affairs of the Company
               or its Related Bodies Corporate or their prospects disclosed to
               the Purchaser or any of its officers, employees, agents or
               advisers by any Associated Person.

     11.4 The Vendor and BHP indemnifies the Purchaser against all liability or
          loss arising directly or indirectly from, and any costs, charges and
          expenses incurred in connection with, any inaccuracy in or breach of
          any of the Warranties given by either of them.


12   Costs and stamp duty
- --------------------------------------------------------------------------------
     12.1 Each party agrees to bear their own legal and other costs and expenses
          in connection with, the preparation, execution and completion of this
          agreement and of other related documentation, except for stamp duty.

     12.2 The Purchaser agrees to bear all stamp duty payable or assessed in
          connection with this agreement and the transfer of the Shares to the
          Purchaser.


13   Notices
- --------------------------------------------------------------------------------
     13.1 A notice, approval, consent or other communication in connection with
          this agreement:

          (a)  must be in writing;

          (b)  must be marked for the attention as shown below; and

          (c)  must be left at the address of the addressee, or sent by prepaid
               ordinary post (airmail if posted to or from a place outside
               Australia) to the address of the addressee or sent by facsimile
               to the facsimile number of the addressee which is specified in
               this clause or if the addressee notifies another address or
               facsimile number then to that address or facsimile number.

                            The address and facsimile number of each party is:

                            Vendor
                            Attention: Company Secretary
                            Address:   Level 48, 600 Bourke Street
                                       Melbourne, Victoria
                            Facsimile: 61 3 9609 3946

                            BHP
                            Attention: Company Secretary
                            Address:   Level 48, 600 Bourke Street,
                                       Melbourne, Victoria
                            Facsimile: 61 3 9609 3946

                            Purchaser
                            Attention: Chief Executive Officer
                            Address:   436 Seventh Avenue
                                       Pittsburgh, Pennsylvania
<PAGE>
 
                                                                              18
- --------------------------------------------------------------------------------
                            Facsimile: 0015 1 412 227 2333

    13.2  A notice, approval, consent or other communication takes effect from
          the time it is received unless a later time is specified in it.

    13.3  A letter or facsimile is taken to be received:

          (a)  in the case of a posted letter, on the third (seventh, if posted
               to or from a place outside Australia) day after posting; and

          (b)  in the case of facsimile, on production of a transmission report
               by the machine from which the facsimile was sent which indicates
               that the facsimile was sent in its entirety to the facsimile
               number of the recipient.


14  Miscellaneous
- --------------------------------------------------------------------------------
Exercise of rights
    14.1  A party may exercise a right, power or remedy at its discretion, and
          separately or concurrently with another right, power or remedy. A
          single or partial exercise of a right, power or remedy by a party does
          not prevent a further exercise of that or of any other right, power or
          remedy. Failure by a party to exercise or delay in exercising a right,
          power or remedy does not prevent its exercise.

Waiver and variation
    14.2  A provision of or a right created under this agreement may not be:

          (a)  waived except in writing signed by the party granting the waiver;
               or

          (b)  varied except in writing signed by the parties.

No merger
    14.3  The Warranties in this agreement do not merge on Completion.

Survival of indemnities
    14.4  Each indemnity in this agreement is a continuing obligation, separate 
          and independent from the other obligations of the parties and survives
          termination of this agreement.

Enforcement of indemnities
    14.5  It is not necessary for a party to incur expense or make payment 
          before enforcing a right of indemnity conferred by this agreement.

Further assurances
    14.6  Each party agrees, at its own expense, on the request of any other
          party, to do everything reasonably necessary to give effect to this
          agreement and the transactions contemplated by it (including the
          execution of documents) and to use all reasonable endeavours to cause
          relevant third parties to do likewise.

Publicity
    14.7  A party may not make press or other announcements or releases relating
          to this agreement and the transactions the subject of this agreement
          without the approval of the other parties to the form and manner of
          the announcement or release unless that announcement or release is
          required to be made by law or by a stock exchange. The parties must
          consult with each other and co-ordinate any Stock Exchange 
          announcements or other release they are required to make by law or
          by reason of Stock Exchange Listing Rules.
<PAGE>
 
                                                                              19
- --------------------------------------------------------------------------------
Time of the essence
    14.8  Time is of the essence of this agreement in respect of any date or
          period determined under this agreement.

Entire agreement
    14.9  This agreement constitutes the entire agreement of the parties about
          its subject matter and any previous agreements, understandings and
          negotiations on that subject matter cease to have any effect.


15  Governing law, jurisdiction and service of process
- --------------------------------------------------------------------------------
    15.1  This agreement and the transactions contemplated by this agreement are
          governed by the law in force in Victoria.

    15.2  Each party irrevocably and unconditionally submits to the exclusive
          jurisdiction of the courts of Victoria and courts of appeal from them
          for determining any dispute concerning this agreement or the
          transactions contemplated by this agreement. Each party waives any
          right it has to object to an action being brought in those courts, to
          claim that the action has been brought in an inconvenient forum, or to
          claim that those courts do not have jurisdiction.

    15.3  Without preventing any other mode of service, any document in an 
          action (including, but not limited to, any writ of summons or other
          originating process or any third or other party notice) may be served
          on any party by being delivered to or left for that party at its 
          address for service of notices under clause 13. In addition, the
          Purchaser nominates Baker & McKenzie, solicitors, Melbourne as its
          agent for the acceptance of service of process.


16  Partial execution
- --------------------------------------------------------------------------------
    16.1  The parties acknowledge that on and from the date of execution of this
          agreement by each of the Vendor, the Purchaser and BHP, this agreement
          is binding between those parties and they must each procure entry into
          this agreement by the Company, Continental Carbon and KAP Investments.


17  Counterparts
- --------------------------------------------------------------------------------
    17.1  This agreement may be executed in, and consist of, a number of
          counterparts. All counterparts (including executed counterparts
          received by facsimile) taken together constitute one and the same
          instrument.


EXECUTED as an agreement.
<PAGE>
 
                                                                              20
- --------------------------------------------------------------------------------

SIGNED by Geoffrey Michael Walsh      )
as authorised representative for      )
BHP NOMINEES NO. 3 PTY LTD            )
(ACN 006 528 678) in the              )
presence of:                          )
                                      )
                                      )
     /s/ John Atkin                   )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     John Atkin                       )        /s/ G. M. Walsh
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
     525 Collins St, Melbourne        )    agreement on behalf of BHP NOMINEES
 ..................................    )    No. 3 PTY LTD
Address of witness                    )
                                      )
                                      )
     Solicitor                        )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
                                      )
SIGNED by Geoffrey Michael Walsh      )
as authorised representative for      )
THE BROKEN HILL PROPRIETARY           )
COMPANY LIMITED (ACN 004 028          )
007 in the presence of:               )
                                      )
                                      )
     /s/ John Atkin                   )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     John Atkin                       )         /s/ G. M. Walsh
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
     525 Collins St, Melbourne        )    agreement on behalf of THE BROKEN
 ..................................    )    HILL PROPRIETARY COMPANY LIMITED
Address of witness                    )
                                      )
                                      )
     Solicitor                        )
 ..................................    )
Occupation of witness                 )
<PAGE>
 
                                                                              21
- --------------------------------------------------------------------------------

SIGNED by                             )
as authorised representative for      )
KOPPERS INDUSTRIES, INC. in the       )
presence of:                          )
                                      )
                                      )
     /s/ R. D. Collins                )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     R. D. Collins                    )        /s/ R. K. Wagner 
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
     436 Seventh Ave.                 )    agreement on behalf of KOPPERS
 ..................................    )    INDUSTRIES, INC.
Address of witness                    )
                                      )
                                      )
     V.P. and Secretary               )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
                                      )
SIGNED by                             )
as authorised representative for      )
KOPPERS AUSTRALIA PTY                 )
LIMITED (ACN 000 566 629)             )
in the presence of:                   )
                                      )
                                      )
                                      )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
                                      )                                        
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
                                      )    agreement on behalf of KOPPERS
 ..................................    )    AUSTRALIA PTY LIMITED
Address of witness                    )
                                      )
                                      )
                                      )
 ..................................    )
Occupation of witness                 )
<PAGE>
 
                                                                              21
- --------------------------------------------------------------------------------

SIGNED by                             )
as authorised representative for      )
KOPPERS INDUSTRIES, INC. in the       )
presence of:                          )
                                      )
                                      )
                                      )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
                                      )                                        
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
                                      )    agreement on behalf of KOPPERS
 ..................................    )    INDUSTRIES, INC.
Address of witness                    )
                                      )
                                      )
                                      )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
                                      )
SIGNED by Brooks Wilson               )
as authorised representative for      )
KOPPERS AUSTRALIA PTY                 )
LIMITED (ACN 000 566 629)             )
in the presence of:                   )
                                      )
                                      )
     /s/ A. Cherry                    )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     Anne Cherry                      )         /s/ Brooks C. Wilson
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
     43 Bay Rd. Waverton 2060         )    agreement on behalf of KOPPERS
 ..................................    )    AUSTRALIA PTY LIMITED
Address of witness                    )
                                      )
                                      )
     Company Secretary                )
 ..................................    )
Occupation of witness                 )
<PAGE>
 
                                                                              22
- --------------------------------------------------------------------------------
SIGNED by Brooks Wilson               )
as authorised representative for      )
CONTINENTAL CARBON AUSTRALIA PTY      )
LIMITED (ACN 000 486 966) in the      )
presence of:                          )
                                      )
                                      )
     /s/ A. Cherry                    )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     Anne Cherry                      )         /s/ Brooks C. Wilson 
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
     43 Bay Rd. Waverton 2060         )    agreement on behalf of CONTINENTAL
 ..................................    )    CARBON AUSTRALIA PTY LIMITED
Address of witness                    )
                                      )
                                      )
     Company Secretary                )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
                                      )
SIGNED by                             )
as authorised representative for      )
KAP INVESTMENTS, INC. in the          )
presence of:                          )
                                      )
                                      )
                                      )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
                                      )                                        
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
                                      )    agreement on behalf of KAP
 ..................................    )    INVESTMENTS, INC.
Address of witness                    )
                                      )
                                      )
                                      )
 ..................................    )
Occupation of witness                 )
<PAGE>
 
                                                                              22
- --------------------------------------------------------------------------------
SIGNED by                             )
as authorised representative for      )
CONTINENTAL CARBON AUSTRALIA PTY      )
LIMITED (ACN 000 486 966) in the      )
presence of:                          )
                                      )
                                      )
                                      )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
                                      )                                        
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
                                      )    agreement on behalf of CONTINENTAL
 ..................................    )    CARBON AUSTRALIA PTY LIMITED
Address of witness                    )
                                      )
                                      )
                                      )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
                                      )
SIGNED by                             )
as authorised representative for      )
KAP INVESTMENTS, INC. in the          )
presence of:                          )
                                      )
                                      )
     /s/ R. D. Collins                )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     R. D. Collins                    )         /s/ R. K. Wagner
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    signatory warrants that the signatory
                                      )    is duly authorised to execute this
     436 Seventh Ave.                 )    agreement on behalf of KAP
 ..................................    )    INVESTMENTS, INC.
Address of witness                    )
                                      )
                                      )
     V.P. and Secretary               )
 ..................................    )
Occupation of witness                 )

<PAGE>
                                                                     Exhibit 2.2

 
                             Dated 2 December 1997




                              VARIATION AGREEMENT

                           BHP NOMINEES INVESTMENTS
                               NO. 3 PTY LIMITED
                                  ("Vendor")

                                THE BROKEN HILL
                              PROPRIETARY COMPANY
                                    LIMITED
                                    ("BHP")

                           KOPPERS INDUSTRIES, INC.
                                 ("Purchaser")

                             KOPPERS AUSTRALIA PTY
                              LIMITED ("Company")

                              CONTINENTAL CARBON
                             AUSTRALIA PTY LIMITED
                            ("Continental Carbon")

                             KAP INVESTMENTS, INC.
                              ("KAP Investments")





                           Mallesons Stephen Jaques
                                  Solicitors

                                    Rialto
                              525 Collins Street
                              Melbourne Vic 3000
                           Telephone (613) 9643 4000
                              Fax (613) 0643-5999
                               DX ICI Melbourne
                                  Ref RPL JA
                              MEL CORP/029097.01


<PAGE>
 
                              VARIATION AGREEMENT

Date:            2 December 1997

Parties:         BHP NOMINEES INVESTMENTS NO. 3 PTY LIMITED (ACN
                 006 528 678) having its registered office at 600 Bourke Street,
                 Melbourne, Victoria, 3000 ("Vendor")

                 THE BROKEN HILL PROPRIETARY COMPANY LIMITED
                 (ACN 004 028 077) having its registered office at 600 Bourke 
                 Street, Melbourne, Victoria, 3000 ("BHP")
 
                 KOPPERS INDUSTRIES, INC. of 436 Seventh Avenue, Pittsburgh, 
                 Pennsylvania ("Purchaser")

                 KOPPERS AUSTRALIA PTY LIMITED (ACN 000 566 629) having its 
                 registered office at 15 Blue Street, North Sydney ("Company")

                 CONTINENTAL CARBON AUSTRALIA PTY LIMITED
                 (ACN 000 486 966) having its registered office at 15 Blue 
                 Street, North Sydney ("Continental Carbon")

                 KAP INVESTMENTS, INC. a Delaware corporation ("KAP
                 Investments")

Recitals:

            A.   BHP, the Vendor, the Purchaser, the Company, Continental Carbon
                 and KAP Investments are each party to an Agreement for Sale of
                 Shares dated 8 October 1997 under which the Vendor agreed to
                 sell and the Purchaser agreed to purchase, the whole of the
                 Vendor's interest in the Company, being 6,187,500 A Class
                 shares of $1.00 each in the capital of the Company ("Share Sale
                 Agreement")


            B.   The parties wish to vary the provisions of the Share Sale 
                 Agreement in accordance with this agreement.


Operative provisions:

1  PURPOSE AND INTERPRETATION
- --------------------------------------------------------------------------------

            1.1   This agreement sets out the terms and conditions on which the 
                  parties agree to vary the Share Sale Agreement.

 
            1.2   Unless otherwise defined in this agreement, capitalised terms 
                  used in this agreement shall have the meanings given to them
                  in the Share Sale Agreement.

            1.3   In this agreement unless the contrary intention appears

                  (a)   the singular includes the plural and vice versa; and
               
                  (b)   a reference to an agreement or another instrument 
                        includes any variation or replacement of either of them;
                        and
<PAGE>
 
                                                                               2
- --------------------------------------------------------------------------------
                  (c)   a reference to a statute, ordinance, code or other law 
                        includes regulations and other instruments under it and
                        consolidations, amendments, re-enactments or
                        replacements of any of them; and

                  (d)   the word person includes a firm, body corporate, 
                        unincorporated association or an authority, and


                  (e)   a reference to a person includes the person's
                        executors, administrators, successors, substitutes
                        (including, without limitation, persons taking by
                        novation), and assigns.

            1.4   Headings are included for convenience and do not affect the 
                  interpretation of this agreement.
  

2   VARIATION
- --------------------------------------------------------------------------------
            2.1   The parties agree that the Share Sale Agreement shall be
                  varied in the manner set out in the Schedule. The variations
                  effected by this agreement shall be deemed to have taken
                  effect on and from the date of completion of the Share Sale
                  Agreement ("Effective Date").

            2.2   The Share Sale Agreement shall be read and construed and
                  given full force and effect on and from the Effective Date as
                  if the amendments set out in the Schedule were made to the
                  Share Sale Agreement.

            2.3   In all respects other than as set out in clauses 2.1 and 2.2, 
                  the parties expressly confirm and ratify the terms of the
                  Share Sale Agreement.


3.   Counterparts
- --------------------------------------------------------------------------------
            3.1   This agreement may be executed in, and consist of, a number
                  of counterparts. All counterparts (including executed
                  counterparts received by facsimile) taken together constitute
                  one and the same instrument.

EXECUTED as an agreement.
<PAGE>
 
                                                                               3
- --------------------------------------------------------------------------------
Schedule
- --------------------------------------------------------------------------------
1     Rectification of name

1.1   Each reference to "BHP Nominees No. 3 Pty. Ltd (ACN 006 528 678)" and the
      "Vendor" in the Share Sale Agreement, including without limitation the
      references to "BHP" Nominees No. 3 Pty Ltd" in the execution clause, first
      page and front cover, is taken to be a reference to "BHP Nominees
      Investments No. 3 Pty Limited (ACN 006 528 678)"

2     Variations to clause 8.3

2.1   Amendment to clause 8.3 by inserting:
 
      "(f)  For the avoidance of doubt, where the Company makes a claim for one 
            or more items under this clause 8.3, Koppers Coal Tar is not
            entitled to make a claim for the same item or items under clause 12
            of the Coal Tar Contract (and vice versa), and BHP's aggregate
            maximum liability under clause 12 of the Coal Tar Contract and
            clause 8.3(c) of this agreement is A$9 million."

3     Variations to clause 8.4

3.1   Amendment to clause 8.4(a) by inserting the phrase "Koppers Coal Tar" 
      after the words "Continental Carbon", and inserting the words "of this
      agreement or clause 12 of the Coal Tar Contract" after the words "clauses
      8.2 or 8.3".

3.2   Amendment to clause 8.4(b) by inserting the phrase "or Koppers Coal Tar" 
      after the words "the Company" wherever occurring, and inserting the words
      "of this agreement or clause 12 of the Coal Tar Contract" after the phrase
      "clauses 8.2 or 8.3" wherever occurring.

3.3   Amendment to clause 8.4(c) by inserting the phrase "or Koppers Coal Tar" 
      after the words "the Company", and inserting the phrase "of this agreement
      or clause 12 of the Coal Tar Contract" after the words "clauses 8.2 or
      8.3".

3.4   Amendment to clause 8.4(d) by inserting the phrase "of this agreement or 
      clause 12 of the Coal Tar Contract" after the phrase "clauses 8.2 or 8.3"
      wherever occurring.

4     Variations to clause 8.5

4.1   Amendment to clause 8.5(d) by substituting for the existing words "12
      year term" the words "10 year term".

5     Variations to clause 8.11

5.1   Amendment to clause 8.11 by inserting the words "(other than the Coal Tar 
      Contract)" after the words "Bodies Corporate" second appearing and
      deleting after the words "are amended" the words "on or prior to
      Completion".

6     Superannuation

6.1   Amendment to clause 9.1 by inserting the words "or such later date agreed 
      between the Vendor and the Purchaser" after the words "clause 9.4" in the
      definition of "Payment Date".

<PAGE>
 
                                                                               4
- --------------------------------------------------------------------------------
6.2   Amendment to clause 9.1 by deleting the words "accept the Purchaser's 
      invitation to transfer to" in the definition of "Transferring Members" and
      substituting for them the words "become members of

6.3   Amendment to clause 9.2 by inserting the words "unless the Purchaser's 
      Fund is a successor fund as defined in the Superannuation Industry
      (Supervision) Regulations, in which case the Purchaser must do all things
      within its power to cause the employees to join the Purchaser's Fund with
      effect from the Completion Date" after the words "Completion Date" fourth
      appearing.

6.4   Amendment to clause 9.3 by deleting the words "accept the Purchaser's 
      invitation to transfer to" and substituting for them the word "join".
<PAGE>
 
                                                                               5
- --------------------------------------------------------------------------------
Execution page
- --------------------------------------------------------------------------------

SIGNED by                             )
as attorney for BHP NOMINEES          )
INVESTMENTS NO. 3 PTY                 )
LIMITED (ACN 006 628 678) under       )
power of attorney dated 1 October     )
1997 in the presence of:              )
                                      )
                                      )
                                      )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
                                      )             /s/ G. M. Walsh
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    attorney states that the attorney   
                                      )    has received no notice of revocation
 525 Collins Street Melbourne         )    of the power of attorney             
 ..................................    )
Address of witness                    )
                                      )
                                      )
        Lawyer                        )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
SIGNED by                             )
as attorney for THE BROKEN HILL       )
PROPRIETARY COMPANY                   )
LIMITED (ACN 004 028 077) under       )
power of attorney dated 1 October     )
1997 in the presence of:              )
                                      )
                                      )
                                      )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
                                      )        /s/ G. M. Walsh
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    attorney states that the attorney   
                                      )    has received no notice of revocation
   525 Collins St. Melbourne          )    of the power of attorney             
 ..................................    )
Address of witness                    )
                                      )
                                      )
     Lawyer                           )
 ..................................    )
Occupation of witness                 )
<PAGE>
 
                                                                               6
- --------------------------------------------------------------------------------
SIGNED by Brooks C. Wilson            )
as attorney for KOPPERS               )
INDUSTRIES, INC. under power of       )
attorney dated 1 Dec 1997 in the      )
presence of:                          )
                                      )
                                      )
     /s/ A. Cherry                    )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     Anne Cherry                      )         /s/ Brooks C. Wilson
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    attorney states that the attorney   
                                      )    has received no notice of revocation
   43 Bay Rd., Waverton 2060          )    of the power of attorney             
 ..................................    )
Address of witness                    )
                                      )
                                      )
   Company Secretary                  )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
SIGNED by Brooks C. Wilson            )
as attorney for KOPPERS AUSTRALIA     )
PTY LIMITED (ACN 000 566 629)         )
under power of attorney dated 2 Dec   )
1997 in the presence of:              )
                                      )
                                      )
    /s/ A. Cherry                     )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
   Anne Cherry                        )         /s/ Brooks C. Wilson
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    attorney states that the attorney   
                                      )    has received no notice of revocation
   43 Bay Rd., Waverton 2060          )    of the power of attorney             
 ..................................    )
Address of witness                    )
                                      )
                                      )
     Company Secretary                )
 ..................................    )
Occupation of witness                 )
<PAGE>
 
                                                                               7
- --------------------------------------------------------------------------------
SIGNED by Brooks C. Wilson            )
as attorney for CONTINENTAL           )
CARBON AUSTRALIA PTY                  )
LIMITED (ACN 000 486 966) under       )
power of attorney dated 2 Dec 1997    )
in the presence of:                   )
                                      )
                                      )
    /s/ A. Cherry                     )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
     Anne Cherry                      )         /s/ Brooks C. Wilson
 ..................................    )    ....................................
Name of witness (block letters)       )    By executing this agreement the     
                                      )    attorney states that the attorney   
                                      )    has received no notice of revocation
  43 Bay Rd., Waverton 2060           )    of the power of attorney             
 ..................................    )
Address of witness                    )
                                      )
                                      )
    Company Secretary                 )
 ..................................    )
Occupation of witness                 )
                                      )
                                      )
SIGNED by Brooks C. Wilson            )
as attorney for KAP INVESTMENTS,      )
INC. in the presence of:              )
                                      )
                                      )
    /s/ A. Cherry                     )
 ..................................    )
Signature of witness                  )
                                      )
                                      )
    Anne Cherry                       )         /s/ Brooks C. Wilson
 ..................................    )    ....................................
Name of witness (block letters)       )    
                                      )    
                                      )    
    43 Bay Rd., Waverton 2060         )    
 ..................................    )
Address of witness                    )
                                      )
                                      )
     Company Secretary                )
 ..................................    )
Occupation of witness                 )


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