ICO INC
SC 13D/A, 1997-12-12
OIL & GAS FIELD SERVICES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13D
                                AMENDMENT NO. 17

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934



                                    ICO, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)



                      Common Stock, No par value per share
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)



                                    449294206
- --------------------------------------------------------------------------------
                                 (CUSIP Number)



                              Gary P. Kreider, Esq.
                       Keating, Muething & Klekamp, P.L.L.
                       One East Fourth Street, 18th Floor
                             Cincinnati, Ohio 45202
                                 (513) 579-6411
- --------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)



                                 October 1, 1997
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].

Check the following box if a fee is being paid with this statement [ ].





<PAGE>




 CUSIP NO. 449294206                    13D               Page 2 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

          Dr. Asher O. Pacholder

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*          (a)  [X]
                                                                   (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             5,682,138 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              146,245 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               750,843 (See Item 5)
- ------- ------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        5,682,138 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        26.04% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*

           IN
- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                  13D            Page 3 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Sylvia A. Pacholder

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*           (a)  [X]
                                                                    (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             5,682,138 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              167,2768(See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               750,843 (See Item 5)
- ------- ------------------------------------------------------------------------

11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        5,682,138 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        26.04% (See Items 5 & 6)

- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN
- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                  13D               Page 4 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Robin E. Pacholder

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*           (a)  [X]
                                                                    (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH               36,300 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               0
- ------- ------------------------------------------------------------------------

11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                     13D               Page 5 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         William J. Morgan

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*            (a)  [X]
                                                                     (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH               20,000 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               750,843 (See Item 5)
- ------- ------------------------------------------------------------------------

11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                       13D               Page 6 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Pacholder Associates, Inc., Tax I.D. #31-1089398

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*            (a)  [X]
                                                                     (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           Ohio corporation

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              0 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               750,843 (See Item 5)
- ------- ------------------------------------------------------------------------

11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IA

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                     13D               Page 7 of 24 Pages
- --------------------------------------------------------------------------------
 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         P M Delaware

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*            (a)  [X]
                                                                     (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              0 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               570,843 (See Item 5)
- ------- ------------------------------------------------------------------------

11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           CO

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                    13D               Page 8 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

           William E. Willoughby

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*           (a)   [X]
                                                                    (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              1,267,719 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               149,139 (See Item 5)
- --------------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)

- ------- ------------------------------------------------------------------------

12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)

- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN


- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                   13D               Page 9 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Peggy S. Willoughby

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       (a)   [X]
                                                                (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              395,665 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               149,139 (See Item 5)
- ------- ------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*

           IN
- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                  13D                Page 10 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         William C. Willoughby

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*              (a)  [X]
                                                                       (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               40,212 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              845,255 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               0
- ------- ------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
        4,327,258 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.84% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*

           IN
- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                  13D               Page 11 of 24 Pages
- --------------------------------------------------------------------------------

 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Regina S. Willoughby
- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*          (a)   [X]
                                                                   (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               17,898 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              113,411 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               0
- ------- ------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,286,944 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)

- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                   13D                Page 12 of 24 Pages
- --------------------------------------------------------------------------------
 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Theo J.M.L. Verhoeff

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       (a)   [X]
                                                                (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

          Citizen of the Netherlands

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              131,709 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               0
- ------- ------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                    13D                Page 13 of 24 Pages
- --------------------------------------------------------------------------------
 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Catherine Willoughby Stephens

- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*        (a)   [X]
                                                                 (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen

- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               0 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             4,287,046 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              309,702 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               0
- ------- ------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        4,287,046 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        19.65% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP NO. 449294206                    13D              Page 14 of 24 Pages
- --------------------------------------------------------------------------------
 1      NAME OF REPORTING PERSONS
        S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

           Walter L. Leib
- ------- ------------------------------------------------------------------------
 2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*      (a)   [X]
                                                               (b)

- ------- ------------------------------------------------------------------------
 3      SEC USE ONLY

- ------- ------------------------------------------------------------------------
 4      SOURCE OF FUNDS*

           See Item 3
- ------- ------------------------------------------------------------------------
 5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
        TO ITEM 2(d) or 2(e)

- ------- ------------------------------------------------------------------------
 6      CITIZENSHIP OR PLACE OF ORGANIZATION

           United States citizen
- ------- ------------------------------------------------------------------------
                        7      SOLE VOTING POWER
                        
                               47,195 (See Items 5 & 6)
                        --------------------------------------------------------
       NUMBER OF        8      SHARED VOTING POWER
         SHARES
      BENEFICIALLY             1,202,682 (See Items 5 & 6)
       OWNED BY         --------------------------------------------------------
         EACH           9      SOLE DISPOSITIVE POWER
       REPORTING
      PERSON WITH              47,195 (See Item 5)
                        --------------------------------------------------------
                       10      SHARED DISPOSITIVE POWER

                               0
- ------- ------------------------------------------------------------------------
11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

        1,202,682 (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES*

- ------- ------------------------------------------------------------------------
13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

        5.5% (See Items 5 & 6)
- ------- ------------------------------------------------------------------------
14      TYPE OF REPORTING PERSON*
           IN

- ------- ------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




This Amendment No. 17 to Schedule 13D is filed solely to amend Items 2 and 5.

ITEM 2.  IDENTITY AND BACKGROUND.

         DR. ASHER O. PACHOLDER

         (a) - (c)  Dr. Asher O. Pacholder  ("AOP") is the Chairman of the Board
                    of   Directors   and  Chief   Operating   Officer  of  Wedco
                    Technology,  Inc.  ("Wedco"),  Route 173,  West Portal,  New
                    Jersey  08802,  and Chairman of the Board of  Directors  and
                    Chief  Financial  Officer of ICO,  11490  Westheimer,  Suite
                    1000, Houston, Texas 77077.

         (d)        AOP during the last five (5) years,  has not been  convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        AOP during the last five (5) years,  has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which  resulted in AOP being at any
                    time subject to a judgment,  decree or final order enjoining
                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.


         SYLVIA A. PACHOLDER

         (a) - (c)  Sylvia A. Pacholder  ("SAP") is President,  Chief  Executive
                    Officer and Director of Wedco,  Route 173, West Portal,  New
                    Jersey  08802,  and  President,   Chief  Executive  Officer,
                    Secretary and Director of ICO,11490 Westheimer,  Suite 1000,
                    Houston, Texas 77077.

         (d)        SAP during the last five (5) years,  has not been  convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        SAP during the last five (5) years,  has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which  resulted in SAP being at any
                    time subject to a judgment,  decree or final order enjoining
                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.




                                     - 15 -

<PAGE>


         ROBIN E. PACHOLDER

         (a) - (c)  Robin E. Pacholder ("REP") is Senior Vice President, General
                    Counsel and a Director of ICO,11490 Westheimer,  Suite 1000,
                    Houston, Texas 77077.

         (d)        REP during the last five (5) years,  has not been  convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        REP during the last five (5) years,  has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which  resulted in REP being at any
                    time subject to a judgment,  decree or final order enjoining
                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.


         WILLIAM J. MORGAN

         (a) - (c)  William J.  Morgan  ("Morgan")  is  President  and  Managing
                    Director of  Pacholder  Associates,  Inc.,  8044  Montgomery
                    Road, Suite 382,  Cincinnati,  Ohio 45202, and a Director of
                    ICO,11490 Westheimer, Suite 1000, Houston, Texas 77077.

         (d)        Morgan  during  the  last  five  (5)  years,  has  not  been
                    convicted  in  a  criminal  proceeding   (excluding  traffic
                    violations or similar misdemeanors).

         (e)        Morgan during the last five (5) years,  has not been a party
                    to a civil proceeding of a judicial or  administrative  body
                    of competent  jurisdiction which resulted in Morgan being at
                    any time  subject  to a  judgment,  decree  or  final  order
                    enjoining future  violations of, or prohibiting or mandating
                    activities  subject to, federal or state  securities laws or
                    finding any violation with respect to such laws.

         (f)        United States citizen.


         PACHOLDER ASSOCIATES, INC.

         (a) - (c)  Pacholder  Associates,  Inc.("Pacholder  Associates")  is an
                    Ohio corporation. Pacholder Associates' business address and
                    the address of its principal office is 8044 Montgomery Road,
                    Suite 382, Cincinnati, Ohio 45202.

         (d)        Pacholder Associates during the last five (5) years, has not
                    been convicted in a criminal  proceeding  (excluding traffic
                    violations or similar misdemeanors).

         (e)        Pacholder Associates during the last five (5) years, has not
                    been  a  party  to  a  civil  proceeding  of a  judicial  or
                    administrative body of competent jurisdiction which

                                               - 16 -

<PAGE>




                    resulted in Pacholder  Associates  being at any time subject
                    to a  judgment,  decree  or  final  order  enjoining  future
                    violations  of,  or  prohibiting  or  mandating   activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        Not applicable.


         P M DELAWARE, INC.

         (a) - (c)  P  M  Delaware,   Inc.  ("P  M  Delaware")   is  a  Delaware
                    corporation. P M Delaware's business address and the address
                    of its principal  office is 1105 North Market Street,  Suite
                    1300, P.O. Box 8985, Wilmington, Delaware 19899.

         (d)        P M Delaware  during  the last five (5) years,  has not been
                    convicted  in  a  criminal  proceeding   (excluding  traffic
                    violations or similar misdemeanors).

         (e)        P M Delaware during the last five (5) years,  has not been a
                    party to a civil proceeding of a judicial or  administrative
                    body  of  competent  jurisdiction  which  resulted  in  P  M
                    Delaware being at any time subject to a judgment,  decree or
                    final order enjoining  future  violations of, or prohibiting
                    or  mandating   activities  subject  to,  federal  or  state
                    securities  laws or finding any  violation  with  respect to
                    such laws.

         (f)        Not applicable.


         WILLIAM E. WILLOUGHBY

         (a) - (c)  William E.  Willoughby  ("WEW") is a  consultant  for Wedco,
                    Route 173, West Portal,  New Jersey 08802, and a Director of
                    ICO,11490 Westheimer, Suite 1000, Houston, Texas 77077.

         (d)        WEW during the last five (5) years,  has not been  convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        WEW during the last five (5) years,  has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which  resulted in WEW being at any
                    time subject to a judgment,  decree or final order enjoining
                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.


                                     - 17 -

<PAGE>




         PEGGY S. WILLOUGHBY

         (a) - (c)  Peggy S.  Willoughby  ("PSW") is the wife of WEW and resides
                    at 607 U.S. Highway, Far Hills, New Jersey 07931.

         (d)        PSW during the last five (5) years,  has not been  convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        PSW during the last five (5) years,  has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which  resulted in PSW being at any
                    time subject to a judgment,  decree or final order enjoining
                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.


         WILLIAM C. WILLOUGHBY

         (a) - (c)  William C. Willoughby ("WCW") is the son of WEW.

         (d)        WCW during the last five (5) years,  has not been  convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        WCW during the last five (5) years,  has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which  resulted in WCW being at any
                    time subject to a judgment,  decree or final order enjoining
                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.


         REGINA S. WILLOUGHBY

         (a) - (c)  Regina S. Willoughby ("RSW") is the wife of WCW.

         (d)        RSW during the last five (5) years,  has not been  convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        RSW during the last five (5) years,  has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which  resulted in RSW being at any
                    time subject to a judgment,  decree or final order enjoining
                    
                                     - 18 -

<PAGE>




                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.


         THEO J.M.L. VERHOEFF

         (a) - (c)  Theo J.M.L.  Verhoeff  ("Verhoeff")  is the  Executive  Vice
                    President-European  Operations  for Wedco,  Route 173,  West
                    Portal, New Jersey 08802.

         (d)        Verhoeff  during  the  last  five  (5)  years,  has not been
                    convicted  in  a  criminal  proceeding   (excluding  traffic
                    violations or similar misdemeanors).

         (e)        Verhoeff  during  the last  five (5)  years,  has not been a
                    party to a civil proceeding of a judicial or  administrative
                    body of competent  jurisdiction  which  resulted in Verhoeff
                    being at any time  subject  to a  judgment,  decree or final
                    order  enjoining  future  violations  of, or  prohibiting or
                    mandating activities subject to, federal or state securities
                    laws or finding any violation with respect to such laws. 

         (f)        Citizen of The Netherlands.


           CATHERINE WILLOUGHBY STEPHENS

         (a) - (c)  Catherine  Willoughby Stephens  ("Stephens") is the daughter
                    of WEW. She is Vice President for Stephens Realty, Inc., 120
                    Hana Highway, P.O. Box 50, Paia, Hawaii 96799.

         (d)        Stephens  during  the  last  five  (5)  years,  has not been
                    convicted  in  a  criminal  proceeding   (excluding  traffic
                    violations or similar misdemeanors).

         (e)        Stephens  during  the last  five (5)  years,  has not been a
                    party to a civil proceeding of a judicial or  administrative
                    body of competent  jurisdiction  which  resulted in Stephens
                    being at any time  subject  to a  judgment,  decree or final
                    order  enjoining  future  violations  of, or  prohibiting or
                    mandating activities subject to, federal or state securities
                    laws or finding any violation with respect to such laws.

         (f)        United States citizen.




                                     - 19 -

<PAGE>


         WALTER L. LEIB

         (a) - (c)  Walter L. Leib ("Leib") is a shareholder  of the law firm of
                    Leib, Kraus, Grispin & Roth, a professional corporation, 328
                    Park  Avenue,  P.O.  Box  310,  Scotch  Plains,  New  Jersey
                    07076-0310.

         (d)        Leib during the last five (5) years,  has not been convicted
                    in a criminal  proceeding  (excluding  traffic violations or
                    similar misdemeanors).

         (e)        Leib during the last five (5) years, has not been a party to
                    a civil proceeding of a judicial or  administrative  body of
                    competent  jurisdiction  which resulted in Leib being at any
                    time subject to a judgment,  decree or final order enjoining
                    future violations of, or prohibiting or mandating activities
                    subject to, federal or state  securities laws or finding any
                    violation with respect to such laws.

         (f)        United States citizen.


As used hereafter,  WEW, PSW, WCW, RSW,  Verhoeff and Stephens are  collectively
referred to as the "Wedco  Shareholders,"  and AOP, SAP, REP, Morgan,  Pacholder
Associates  and  P  M  Delaware  are  collectively   referred  to  as  the  "ICO
Shareholders."  The Wedco Shareholders and the ICO Shareholders are collectively
referred to as the "Shareholders".

ITEM 5.        INTEREST IN SECURITIES OF ISSUER.

(a) - (b)

        As of December 5, 1997, the  Shareholders in the aggregate  beneficially
owned 5,785,281 shares (or  approximately  26.52% of the outstanding  shares) of
ICO Common Stock as follows:



                        HOLDER                       NUMBER OF SHARES
- ------------------------------------------------     ----------------
Dr. Asher O. Pacholder(1)(2)(3)(4)(12)                  2,303,580
Sylvia A. Pacholder(1)(2)(3)(4)(12)                     2,325,103
Robin E. Pacholder(2)(5)(12)                               36,300
William J. Morgan(1)(2)(12)                               770,843
Pacholder Associates, Inc.(1)(12)                         750,843
P M Delaware, Inc.(1)(12)                                 570,843
William E. Willoughby(6)(7)(12)                         1,416,858


                                     - 20 -

<PAGE>



                        HOLDER                       NUMBER OF SHARES
- ------------------------------------------------     ----------------

Peggy S. Willoughby(8)(12)                                395,665
William C. Willoughby(6)(9)(12)                           845,255
Regina S. Willoughby(9)(12)                               113,411
Theo J.M.L. Verhoeff(10)(12)                              131,709
Catherine Willoughby Stephens(12)(13)                     309,702
Walter L. Leib(6)(11)(12)                                  47,195


          (1)  Share amounts  include  180,000 shares of common stock which held
               by OP Limited  Partnership,  a limited  partnership  of which Dr.
               Pacholder  and Mr.  Morgan  are  general  partners.  Pursuant  to
               certain Investment  Advisory  Agreements,  Pacholder  Associates,
               Inc. has sole voting and investment  power over such  securities.
               Share  amounts  also include  415,461  shares of common stock and
               102,879 shares of common stock which may be acquired  through the
               exercise of warrants and 52,503  shares of common stock which may
               be acquired upon conversion of Convertible Exchangeable Preferred
               Stock,  in each case owned by PM Delaware,  Inc., a  wholly-owned
               subsidiary of Pacholder Associates, Inc.

          (2)  Shares  amounts for Ms. S.  Pacholder  include  20,000  shares of
               common stock that are  issuable  upon  exercise of stock  options
               granted  under the 1985 Stock Option Plan.  Share amounts for Ms.
               S. Pacholder and Dr.  Pacholder  include 30,000 and 30,000 shares
               of common stock, respectively, that are issuable upon exercise of
               stock  options  granted  under the 1994 Stock Option Plan.  Share
               amounts for Ms. S. Pacholder and Dr. Pacholder include 35,000 and
               30,000  shares of common stock,  respectively,  that are issuable
               upon  exercise  of stock  options  granted  under the 1995  Stock
               Option Plan.  Share amounts for Dr.  Pacholder,  Ms. S. Pacholder
               and Ms. R. Pacholder include 80,000,  80,000 and 25,000 shares of
               common stock,  respectively,  that are issuable upon the exercise
               of stock options granted under the 1996 Stock Option Plan.  Share
               amounts for Ms. S. Pacholder, Dr. Pacholder, Ms. R. Pacholder and
               Mr. Morgan are 2,000,  6,000,  11,000 and 18,000 shares of common
               stock,  respectively,  that are issuable  upon  exercise of stock
               options granted under the 1993 Stock Option Plan for Non-Employee
               Directors.  Share amounts for Ms. S. Pacholder and Dr.  Pacholder
               include  768.23 and 245.60 shares of common stock,  respectively,
               held in ICO's 401(k) Plan.  

          (3)  Share amounts include  1,395,092 shares of common stock issued in
               connection with  acquisitions over which Ms. S. Pacholder and Dr.
               Pacholder share voting power.  Ms. S. Pacholder and Dr. Pacholder
               disclaim beneficial ownership of these shares.

          (4)  Dr.  Pacholder's  shares exclude  169,768 shares held by his wife
               Ms. S.  Pacholder.  Ms. S.  Pacholder's  shares  exclude  146,245
               shares held by her husband Dr. Pacholder.


          (5)  Includes  300 shares of common  stock which may be acquired  upon
               conversion of Convertible Exchangeable Preferred Stock.

                                     - 21 -

<PAGE>




          (6)  Share  amounts for Mr. W.E.  Willoughby  and Mr. W. Leib  include
               12,000 and 12,000 shares of common stock, respectively,  that are
               issuable upon  exercise of stock  options  granted under the 1993
               Stock Option Plan for Non-Employee Directors.

          (7)  Share amount includes 149,139 shares of common stock held jointly
               with Mr. W.E.  Willoughby's  wife, Peggy S. Willoughby.  Excludes
               395,665  shares  held by Mr.  W.E.  Willoughby's  wife  Peggy  S.
               Willioughby.

          (8)  Share amount excludes 149,139 shares of common stock held jointly
               with Ms. P.  Willoughby's  husband,  William  E.  Willoughby  and
               1,416,858 shares held by Ms. P.  Willoughby's  husband William E.
               Willioughby.

          (9)  Share  amounts  for Mr.  W.C.  Willoughby  and Ms. R.  Willoughby
               include  40,212 and 17,898 shares of common stock,  respectively,
               held as custodian for their minor child.  Excludes  95,513 shares
               of common  stock held by Mr.  W.C.  Willoughby's  wife  Regina S.
               Willoughby.

          (10) Share amount includes 75,149 shares of common stock that are held
               by Mr.  Verhoeff's wife. Share amount also includes 10,000 shares
               of common stock that are issuable  upon exercise of stock options
               under the 1995  Stock  Option  Plan and  40,000  shares of common
               stock that are issuable  upon exercise of stock options under the
               1996 Stock Option Plan.

          (11) Share  amount  includes  274 shares of common  stock which may be
               acquired  upon  the   conversion  of   Convertible   Exchangeable
               Preferred Stock.

          (12) Except  as  specifically  set  forth in the  above  notes,  share
               amounts   exclude  the  shares  of  common  stock  of  the  Other
               Shareholders  that can be voted pursuant to the voting agreements
               and irrevocable proxies described in Item 6.

          (13) Includes  6,758  shares of  common  stock  held by Ms.  Stephens'
               husband.



                                     - 22 -

<PAGE>





     (c)  The following trades were made through market  transactions  since the
          filing of Amendment No. 15 to this Schedule 13D:

                                       Purchase          Number        Price Per
    Shareholder            Date         or Sale       of Shares          Share
- ---------------------     -------       -------       ---------        ---------
William E. Willoughby     8/14/97         Sale          2,500            5 9/16
William E. Willoughby     8/15/97         Sale          5,000            5 9/16
William E. Willoughby     8/15/97         Sale          5,000            5 5/8
William E. Willoughby     8/18/97         Sale          2,000            5 5/8
William E. Willoughby     8/21/97         Sale         10,000            5 7/8
William E. Willoughby     8/22/97         Sale         10,000            6 1/8
William E. Willoughby     8/25/97         Sale          5,000            6 3/8
William E. Willoughby     8/26/97         Sale          5,000            6 3/8
William E. Willoughby     8/26/97         Sale          5,000            6 9/16
William E. Willoughby     8/27/97         Sale         10,000            6 3/4
William E. Willoughby     9/4/97          Sale          1,500            6 1/2
William E. Willoughby     9/9/97          Sale         10,000            6 3/8
William E. Willoughby     9/11/97         Sale          4,100            6 3/8
William E. Willoughby     9/17/97         Sale          5,000            7
William E. Willoughby     9/24/97         Sale          5,000            7 3/8
William E. Willoughby     9/29/97         Sale          5,000            7 1/8
William C. Willoughby     8/4/97          Sale          5,000            5 3/8
William C. Willoughby     8/5/97          Sale         10,000            5 1/2
William C. Willoughby     8/6/97          Sale         17,000            6
William C. Willoughby     8/27/97         Sale         15,000            6 1/8
William C. Willoughby     8/28/97         Sale         10,000            6 7/16
William C. Willoughby     8/29/97         Sale          5,000            6 7/16
William C. Willoughby     9/2/97          Sale         10,000            6 3/4
William C. Willoughby     9/22/97         Sale         10,000            7
William C. Willoughby     9/29/97         Sale          5,000            7 1/4
William C. Willoughby     9/29/97         Sale          5,000            7 3/16
William C. Willoughby     10/3/97         Sale          8,500            7 5/8
William C. Willoughby     10/3/97         Sale          1,500            7 3/4
William C. Willoughby     10/3/97         Sale          5,000            7 3/4
William C. Willoughby     10/8/97         Sale          5,000            7 1/4
William C. Willoughby     10/8/97         Sale          1,000            7 7/8
William C. Willoughby     10/8/97         Sale          5,000            7
William C. Willoughby     10/23/97        Gift          1,000            0
                                                      
           In addition,  on October 1, 1997, OP Limited  Partnership,  a limited
partnership  of  which  Dr.  Pacholder  and Mr.  Morgan  are  general  partners,
distributed 204,380 shares of ICO Common Stock to its partners, including 21,224
shares of ICO Common Stock to PM Delaware, Inc.  On November 5, 1997, OP Limited

                                     - 23 -

<PAGE>



Partnership distributed 78,372 shares of common stock which may be acquired upon
conversion of Convertible  Exchangeable Preferred Stock Convertible Exchangeable
Preferred  Stock to its partners,  including  8,221 shares of Common Stock which
may be acquired upon conversion of Convertible  Exchangeable  Preferred Stock to
PM Delaware, Inc.

(d)        None

(e)        Not Applicable


           After reasonable  inquiry and to  the  best  knowledge  and belief of
the  undersigned,  it is hereby certified that the information set forth in this
statement is true, complete and correct.




Dated:  December 12, 1997              /s/Dr. Asher O. Pacholder
                                       ----------------------------------------
                                       Dr. Asher O. Pacholder, Individually and
                                       As Attorney-in-Fact for:

                                       Sylvia A. Pacholder
                                       Robin E. Pacholder
                                       William J. Morgan
                                       Pacholder Associates, Inc.
                                       P M Delaware, Inc.
                                       William E. Willoughby
                                       Peggy S. Willoughby
                                       William C. Willoughby
                                       Regina S. Willoughby
                                       Theo J.M.L. Verhoeff
                                       Catherine Willoughby Stephens
                                       Walter L. Leib



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