Document:

<PAGE>

                                              [CONFIDENTIAL TREATMENT REQUESTED]

                                                                   EXHIBIT 10.20

**Confidential portions of this Exhibit have been omitted pursuant to the Rules
and Regulations of the Securities and Exchange Commission. The symbol
"[++++++++]" has been used to identify information which is the subject of a
Confidential Treatment Request.**

                           Dated 7/th/ February, 2001

                                   AMENDMENT
                                    to the
                               SUPPLY AGREEMENT
                            dated 13/th/ April, 1999

                        originally entered into between

           SHELL INTERNATIONAL TRADING AND SHIPPING COMPANY LIMITED
           for and on behalf of SHELL TRADING INTERNATIONAL LIMITED

                                      and

                       ICI CHEMICALS & POLYMERS LIMITED

                       and the parties to which are now

           SHELL INTERNATIONAL TRADING AND SHIPPING COMPANY LIMITED
           for and on behalf of SHELL TRADING INTERNATIONAL LIMITED

                                      and

                  HUNTSMAN ICI PETROCHECMICALS (UK) LIMITED,
              (now known as HUNTSMAN PETROCHEMICALS (UK) LIMITED

                     pursuant to a deed of novation dated
                               19/th/ April, 2000
<PAGE>

THIS AMENDMENT (hereafter referred to as "Amendment") is made on 7 February,
2001.

Between:
1.   HUNTSMAN PETROCHEMICALS (UK) LTD, a company incorporated under the laws of
     --------------------------------
     England, with registered number 3767075 and whose registered office is
     situate at Haverton Hill Road, Billingham, TS23 1PS.

     (hereinafter referred to as "HUNTSMAN")

2.   SHELL TRADING INTERNATIONAL LIMITED, a company incorporated under the laws
     -----------------------------------
     of England, acting through its agent SHELL INTERNATIONAL TRADING AND
     SHIPPING COMPANY LIMITED ("STASCO"), a company incorporated under the laws
     of England and Wales, and having its principal office at Shell-Mex House,
     Strand, London WC2R OZA.

     (hereinafter referred to as "STIL")

WHEREAS:

A.   By a Supply Agreement dated 13/th/ April, 1999 (the "Agreement") between
     ICI CHEMICALS & POLYMERS LIMITED and STIL, the parties were to negotiate
     price formula adjustments under clause 8 f).

B.   By a deed of novation dated 19/th/ April 2000 the Agreement was transferred
     by ICI CHEMICALS & POLYMERS LIMITED to HUNTSMAN.

C.   The parties have now reached an agreement which will require the amendment
     of certain terms of the Agreement.

IT IS THEREFORE AGREED AS FOLLOWS:

                             ARTICLE 1: AMENDMENT

1.1  The last paragraph of clause 8 a) of the Agreement shall be amended by
     deleting the existing provisions relating to the calculation of the
     Reformate price P(R) per metric tonne and replacing them with the
     following:

          "The Reformate price P(R) per metric tonne
          = [++++++++]

     For purposes of clarity, as the "[++++++++]" will always result in a
     negative number, in construing the effect of the above amendment the
     parties agree that [++++++++] shall be the number which is closest
     numerically to 0 ([++++++++])

                                       2
<PAGE>

     For the purposes of the calculation of the Reformate price only pursuant to
     clause 8 a) the parties hereto further agree that the Agreement shall be
     construed in such a manner so that the pricing in each monthly invoice
     issued pursuant to clause 14 a) shall be based upon the definitions in the
     existing agreement, but in the final reconciliation calculations made
     pursuant to clause 9, the price of Reformate shall be based upon the
     following definitions:

          P(Bz\\Q\\)  =  [++++++++]

          P(N\\Q\\)   =  [++++++++]

          P(PUL\\Q\\) =  [++++++++]

     The above formula and definitions are valid for both Optimix A, Optimix B1
     and Optimix B2 as defined in Appendix 2 of the Agreement.

1.2  Clause 13 b) of the Agreement shall be deleted and replaced with the
     following:

     "This Agreement shall continue until terminated by either party giving not
     less than 12 months' notice, but no termination shall be effective under
     this clause prior to 31 December 2002."

1.3  Clause 8 f) of the Agreement shall be deleted.

1.4  Unless defined herein, and unless the context otherwise requires, terms
     defined in the Agreement shall have the same meanings herein, and the
     recitals hereto, as ascribed to them in the Agreement.

1.5  Appendices 2, 5, 6, 7a and 7c are amended by replacing such appendices with
     those attached hereto.

1.6  All of the above amendments shall be deemed to be effective as from 1
     October 2000.

                   ARTICLE 2: CONTINUATION OF THE AGREEMENT

The Agreement shall be read subject to this Amendment No. 1 and have as
expressly amended herein, the Agreement shall remain in full force and effect in
accordance with its terms.

                   ARTICLE 3: GOVERNING LAW AND ARBITRATION

Article 21a of the Agreement shall apply to this Amendment No. 1, mutalis
mutandis.

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be signed
by their duly authorized representatives on the dates shown below.

                                       3
<PAGE>

SIGNED
for and on behalf of
SHELL INTERNATIONAL TRADING AND
SHIPPING COMPANY LIMITED
as agents for
SHELL TRADING INTERNATIONAL LIMITED

By:  /s/ John Lawrence
   -------------------------
Name:  John Lawrence
     -----------------------
Title:  VP, Products
      ----------------------
Date:  25/1/2001
     -----------------------

SIGNED
HUNTSMAN PETROCHEMICALS (UK) LIMITED

By:  [Authorized Officer]
   -------------------------
Date:  7/2/2001
     -----------------------

                                       4<PAGE>

                                                                   EXHIBIT 10.21

<PAGE>

                                                                  EXECUTION COPY

                                FIRST AMENDMENT
                                ---------------

          This FIRST AMENDMENT (this "Amendment"), dated as of December 21,
                                      ---------
2000, is entered into by and among Huntsman International LLC (f/k/a Huntsman
ICI Chemicals LLC), a Delaware limited liability company (the "Borrower"),
                                                               --------
Huntsman International Holdings LLC (f/k/a Huntsman ICI Holdings LLC), a
Delaware limited liability company ("Holdings"), the undersigned financial
                                     --------
institutions, including Bankers Trust Company, in their capacities as lenders
hereunder (collectively, the "Lenders," and each individually, a "Lender"),
                              -------                             ------
Bankers Trust Company, as Lead Arranger, Administrative Agent ("Administrative
                                                                --------------
Agent") for the Lenders and Sole Book Manager, Goldman Sachs Credit Partners
-----
L.P., as Syndication Agent and Co-Arranger  and The Chase Manhattan Bank and
Warburg Dillon Read (a division of UBS AG), as Co-Arrangers and as Co-
Documentation Agents (collectively, the "Agents" and each individually, an
                                         ------
"Agent").  Terms used herein and not otherwise defined herein shall have the
 -----
same meanings as specified in the Credit Agreement (as defined below).

                                   RECITALS:
                                   --------

     A.   The Borrower, Holdings, the Lenders, the Agents and the Administrative
Agent have heretofore entered into that certain Credit Agreement dated as of
June 30, 1999 (as amended, restated, supplemented or otherwise modified from
time to time, the "Credit Agreement").
                   ----------------

     B.   The Borrower and Holdings wish, and the Lenders signatory hereto and
the Agents and Administrative Agent are willing, to amend the Credit Agreement
subject to the terms and conditions of this Agreement.

     C.   This Agreement constitutes a Loan Document and these Recitals shall be
construed as part of this Agreement.

          NOW, THEREFORE, in consideration of the recitals herein contained and
for other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the parties hereto agree as follows:

     SECTION 1.  Amendment of Credit Agreement.
     ---------   ------------------------------

          The Credit Agreement is hereby amended as follows:

          (a)  Section 1.1 of the Credit Agreement is hereby amended by adding
               -----------
the following definitions in their proper alphabetical order:

          "Acquired Master Trust Receivables Pool" means any pool of
           --------------------------------------
"Receivables" or "Receivable Assets" (as defined in the Master Trust Pooling
Agreement) which derive from a business which has been acquired by Holdings or
any Subsidiary of Holdings in connection with a stock, asset or other
acquisition occurring after the date of the First Amendment.
<PAGE>

          "First Amendment" means that certain First Amendment to this Agreement
           ---------------
dated as of December 21, 2000.

          "Master Trust Participating Subsidiaries" means Tioxide Americas Inc.,
           ---------------------------------------
Huntsman Propylene Oxide Ltd., Huntsman International Fuels, L.P., Tioxide
Europe Limited, Huntsman ICI Petrochemicals (UK) Limited and Huntsman ICI
Holland BV and any other Subsidiary of the Borrower which becomes party to the
Master Trust Receivables Securitization after the Master Trust Receivables
Securitization Closing Date.

          "Master Trust Pledge Agreement" means that certain Pledge Agreement by
           -----------------------------
and between the Borrower and the Master Trust Receivables Subsidiary in favor of
the Administrative Agent on behalf of the Lenders, as amended.

          "Master Trust Pooling Agreement" means that certain Pooling Agreement
           ------------------------------
among the Master Trust Receivables Subsidiary, Huntsman ICI (Europe) B.V.B.A.
and Chase Manhattan Bank (Ireland) plc, as amended.

          "Master Trust Receivables Facility Assets" means all "Receivables" and
           ----------------------------------------
other "Receivable Assets" (as defined in the Master Trust Pooling Agreement) of
the Master Trust Participating Subsidiaries.

          "Master Trust Receivables Securitization" means that certain
           ---------------------------------------
receivables financing program providing for the sale of Master Trust Receivables
Facility Assets pursuant to the Master Trust Receivables Securitization
Documents by the Borrower and the Master Trust Participating Subsidiaries to the
Master Trust Receivables Subsidiary in a transaction constituting a sale for
GAAP purposes and in which, the Master Trust Receivables Subsidiary shall
finance the purchase of such Master Trust Receivables Facility Assets by the
sale, transfer, conveyance, lien or pledge of such Master Trust Receivables
Facility Assets to one or more limited purpose financing companies, special
purpose entities and/or other financial institutions, in each case, on a limited
recourse basis as to the Borrower and the Master Trust Participating
Subsidiaries, as amended.

          "Master Trust Receivables Securitization Closing Date" shall have the
           ----------------------------------------------------
meaning assigned thereto in Section 3 of the First Amendment.
                            ---------

          "Master Trust Receivables Securitization Documents" means all
           -------------------------------------------------
documents and deliveries in connection with the Master Trust Receivables
Securitization, as such documents may be amended or modified from time to time
with the consent of the Administrative Agent, which consent shall not be
unreasonably withheld.

          "Master Trust Receivables Subsidiary" means Huntsman Receivables
           -----------------------------------
Finance LLC, a limited liability company organized under the laws of the State
of Delaware.

          "NPIC Purchase Price Adjustment" shall have the meaning assigned
           ------------------------------
thereto in Section 4 of the First Amendment.
           ---------

          (b)  The definition of "Consolidated Debt" in Section 1.1. of the
                                                        ------------
Credit Agreement is hereby amended by adding the phrase ",without duplication,
the sum of (i)"

                                      -2-
<PAGE>

in the first line thereof immediately following the phrase "at any time" and by
adding the following new language at the end thereof:

          "and (ii) Indebtedness of Borrower and its Subsidiaries of the type
referred to in clause (x) of the definition of such term."

          (c)  The definition of "Consolidated Interest Expense" in Section 1.1
                                                                    -----------
of the Credit Agreement is hereby amended by adding an "(x)" in the first line
thereof immediately following the phrase "the sum of" and by adding the
following new language at the end thereof:

          "and (y) without duplication, any discount in respect of a sale of
Receivables Facility Assets pursuant to a Permitted Accounts Receivable
Securitization regardless of whether such discount would constitute interest
expense as determined in accordance with GAAP. As used in this definition, the
term "interest" shall include, without limitation, any discount in respect of
sales of accounts receivable and/or related contract rights during such period,
all as determined in accordance with GAAP."

          (d)  The definition of "Consolidated Net Worth" in Section 1.1 of the
                                                             -----------
Credit Agreement is hereby amended by adding the following new proviso at the
end thereof:

          "; provided, however, solely for purposes of the calculations required
             --------  -------
     by Section 9.2., there shall be excluded from the calculation of
        -----------
     Consolidated Net Worth the cumulative effect of currency translation
     adjustments."

          (e)  The definition of "Excess Cash Flow" in Section 1.1. of the
                                                       ------------
Credit Agreement is hereby amended by deleting the text of clause (w) thereof
                                                          ----------
and replacing it with the following new language:

               "the Dollar Equivalent of the Scheduled Term A Repayment for
December of such year, if any, without giving effect to any prepayment of such
Scheduled Term A Repayment required pursuant to Section 4.4(k)(i) hereof, plus".
                                                -----------------         ----

          (f)  The definition of "Receivables Subsidiary" in Section 1.1 of the
                                                             -----------
Credit Agreement is hereby amended by adding the following new sentence at the
end thereof:

               "The Master Trust Receivables Subsidiary" shall be considered a
Receivables Subsidiary hereunder."

          (g)  The definition of "Permitted Accounts Receivables Securitization"
in Section 1.1 of the Credit Agreement is hereby amended by adding the following
   -----------
new sentence at the end thereof:

               "The Master Trust Receivables Securitization shall be considered
     a Permitted Accounts Receivables Securitization hereunder."

                                      -3-
<PAGE>

          (h)  The definition of "Security Documents" in Section 1.1 of the
                                                         -----------
Credit Agreement is hereby amended by adding the following new sentence at the
end thereof:

               "For purposes of this Agreement, "Security Documents" shall also
          include the Master Trust Pledge Agreement."

          (i)  The definition of "Unrestricted Subsidiary Investment Basket" in
     Section 1.1 of the Credit Agreement is hereby amended by adding the
     -----------
     following clause at the end thereof:

               ", plus (iv) the actual amount of the NPIC Purchase Price
                  ----
          Adjustment received by the Borrower or any of its Subsidiaries up to
          $35,000,000 provided that such funds are invested in an Unrestricted
          Subsidiary or Permitted Unconsolidated Venture organized, created or
          acquired for the purpose of conducting an Asian polyurethane chemicals
          business"

          (j)  The definition of "Wholly-Owned Subsidiary" in Section 1.1 of the
                                                              -----------
     Credit Agreement is hereby amended by adding the following sentence at the
     end thereof:

               "For purposes of this definition, `capital stock' shall include
          equivalent ownership or controlling interests having ordinary voting
          power in entities other than corporations."

          (k)  Section 4.4(k) of the Credit Agreement is hereby amended by
               --------------
deleting the text thereof and replacing it with the following:

          "(i) On the Master Trust Receivables Securitization Closing Date, the
Borrower shall make a mandatory prepayment equal to the sum of (A) the aggregate
principal amount of the Scheduled Repayments due on or prior to December 31,
2001, such amount to be applied in the manner set forth in Section 4.5(d) plus
                                                           --------------
(B) to the extent that the Receivables Facility Attributed Indebtedness with
respect to the Master Trust Receivables Securitization exceeds $205 million as
of the Master Trust Receivables Securitization Closing Date, the amount of such
excess, with such amount being applied in the manner set forth in Section 4.5(a)
                                                                  --------------
(subject to modification of such application as set forth in Section 4.5(c)).
                                                             --------------
Any initial cash proceeds of the Master Trust Receivables Securitization not
required to be prepaid by the preceding sentence may be retained by the Borrower
but shall be immediately applied pro rata to reduce the outstanding balance of
the Domestic Revolving Loans and Multicurrency Revolving Loans (in each case
without any permanent reduction in the applicable Commitment).  In the event
that the initial cash proceeds of the Master Trust Receivables Securitization
are less than $180 million, the Borrower or its Subsidiaries shall obtain
additional cash proceeds of the Master Trust Receivables Securitization in the
amount of such shortfall which amount shall be immediately applied pro rata to
reduce the outstanding balance of the Domestic Revolving Loans and Multicurrency
Revolving Loans (in each case without any permanent reduction in the applicable
Commitment), it being understood that failure to obtain at least $180 million in
cash proceeds and to apply such amounts as set forth herein on or before thirty
days following the Master Trust Receivables Securitization Closing Date shall
constitutute an Event of Default.

                                      -4-
<PAGE>

     (ii)   On the Business Day of receipt by the Borrower or any of its
Subsidiaries of cash proceeds from the sale or transfer of any Acquired Master
Trust Receivables Pool, an amount equal to 100% of such proceeds shall be
applied as a mandatory prepayment of principal of Loans pursuant to the terms of
Section 4.5(a) (subject to modification of such application as set forth in
--------------
Section 4.5(c)).
--------------

     (iii)  In the event that the Receivables Facility Attributed Indebtedness
with respect to the Master Trust Receivables Securitization equals or exceeds
the sum of (A) $250 million plus (B) any amount prepaid pursuant to Section
                                                                    -------
4.4(k)(ii), then on the date of receipt of cash proceeds arising from such
----------
increased principal amount of the Master Trust Receivables Securitization, the
Borrower shall, to the extent not previously prepaid pursuant to this Section
                                                                      -------
4.4(k)(iii), prepay the principal of the Loans in an amount equal to such
-----------
excess, with such amount applied pursuant to the terms of Section 4.5(a)
                                                          --------------
(subject to modification of such application as set forth in Section 4.5(c)).
                                                             --------------

     (iv)   An amount equal to 100% of the initial net cash proceeds of any
Permitted Accounts Receivable Securitization (other than the Master Trust
Receivables Securitization), and the initial net cash proceeds thereafter
resulting from any additional receivable pools related to such Permitted
Accounts Receivable Securitization, by the Borrower or any of its Subsidiaries
shall be applied as a mandatory repayment of principal of the Loans pursuant to
the terms of Section 4.5(a) (in each case subject to modification of such
             --------------
application as set forth in Section 4.5(c))."
                            ---------------

            (l)   The Credit Agreement is hereby amended by adding the following
new Section 4.5(d) thereto:
    --------------

            "(d)  Master Trust Receivables Securitization Prepayments.
                  ---------------------------------------------------
Notwithstanding anything else herein to the contrary, any prepayment of
principal required to be made by the Borrower pursuant to Section 4.4(k)(i)
                                                          -----------------
shall be applied to the Scheduled Repayments (to the extent not previously
repaid) due December 31, 2000, June 30, 2001 and December 31, 2001 (and in the
amounts set forth in the definitions of Scheduled Term A Dollar Repayments,
Scheduled Term A Euro Repayments, Scheduled Term B Repayments and Scheduled Term
C Repayments) on each of the Term A Dollar Loans, the Term A Euro Loans, the
Term B Loans and Term C Loans, respectively.  All prepayments shall include
payment of accrued interest on the principal amount so prepaid, shall be applied
to the payment of interest before application to principal and shall include
amounts payable, if any, under Section 3.5.  All payments received in Dollars
                               -----------
which are required to be applied in Euros and/or Sterling shall be converted to
Euros or Sterling, as the case may be, at the Spot Rate on the date of such
prepayment."

            (m)   Section 8.4 of the Credit Agreement is hereby amended by
                  -----------
adding the following new proviso at the end thereof:

            "; provided, however, notwithstanding anything else herein to the
               --------  -------
contrary, scheduled interest payments on the Senior Subordinated Notes shall be
permitted to the extent required to be paid pursuant to the terms of the Senior
Subordinated Note Documents."

                                      -5-
<PAGE>

          (n)  Section 8.11(ii) of the Credit Agreement is hereby amended by
               ----------------
moving the phrase "or the Holdings Zero Coupon Notes Documents" from the third
line thereof to immediately before the last semi-colon therein.

          SECTION 2.  Approval of the Master Trust Receivables Securitization.
          ----------  -------------------------------------------------------
(a) The Master Trust Receivables Securitization is hereby approved pursuant to
the terms of the Master Trust Receivables Securitization Documents; and (b) By
its signature below each Lender hereby instructs the Collateral Agent upon the
effectiveness of this Amendment to release its Lien for the benefit of the
Lenders in the Master Trust Receivables Facility Assets and to execute and
deliver to the Borrower UCC financing statements reflecting such release, and
the Collateral Agent hereby agrees to do so.

          SECTION 3.   Conditions to Effectiveness of the Amendment.  (a) The
          ----------   --------------------------------------------
provisions of this Amendment not relating to the Master Trust Receivables
Securitization shall become effective upon the date of the satisfaction of the
conditions set forth below in Sections 3.1, 3.4, 3.5, 3.6 and 3.7 (except to the
                              ---------------------------     ---
extent that Section 3.7 specifically relates to the Master Trust Receivables
            -----------
Securitization) (the "Effective Date"); and (b) the provisions of this Amendment
                      --------------
relating to the Master Trust Receivables Securitization shall become effective
upon the date of the satisfaction of all of the conditions set forth in this
Section 3 (the "Master Trust Receivables Securitization Closing Date"):
---------       ----------------------------------------------------

          3.1  Proper Execution and Delivery of Amendment.  Borrower, Holdings,
               ------------------------------------------
the Administrative Agent, the Required Lenders, the Majority Lenders of the Term
A Facility, the Majority Lenders of the Term B Facility and the Majority Lenders
of the Term C Facility shall have duly executed and delivered to Administrative
Agent this Amendment.

          3.2  Consummation of the Master Trust Receivables Securitization.  The
               -----------------------------------------------------------
Master Trust Receivables Securitization shall have been consummated pursuant to
the terms and conditions of the Master Trust Receivables Securitization
Documents.  None of the terms or conditions of the Master Trust Receivables
Securitization Documents shall have been waived or modified except with the
prior approval of the Administrative Agent and the Master Trust Receivables
Securitization shall have been consummated in compliance with all Requirements
of Law.

          3.3  Prepayments.  Borrower or any of its Subsidiaries (other than the
               -----------
Receivables Subsidiary) shall have received proceeds of not less than $170
million from the Master Trust Receivables Securitization and Borrower shall have
made the mandatory prepayments  and repayments required by Section 4.4(k)(i) of
                                                           -----------------
the Credit Agreement, as amended hereby, in a minimum amount equal to the lesser
of (a) $170 million and (b) the sum of (i) the amount of the Scheduled
Repayments due on or prior to December 31, 2001,  plus (ii) the then outstanding
                                                  ----
principal balance of the Domestic Revolving Loans and Multicurrency Revolving
Loans.

          3.4  Delivery of Credit Party Documents.  On or before the date
               ----------------------------------
hereof, Borrower shall deliver or cause to be delivered to Administrative Agent
the following with respect to each of Borrower and Holdings, each, unless
otherwise noted, dated the Effective Date:

                                      -6-
<PAGE>

               (a)  Certified copies of its Certificate or Articles of
Incorporation, together with a good standing certificate from the Secretary of
State of the jurisdiction of its incorporation and each other state in which it
is qualified as a foreign corporation to do business and where failure to be so
qualified would have a Material Adverse Effect and, to the extent generally
available, a certificate or other evidence of good standing as to payment of any
applicable franchise or similar taxes from the appropriate taxing authority of
each of such states, each dated a recent date prior to the Closing Date or, in
the event that any such document has been previously delivered by the Borrower
to the Administrative Agent, a certificate executed by a Responsible Officer of
the Borrower indicating that no change has occurred with respect to such
document;

               (b)  Copies of its Bylaws, certified by its corporate secretary
or an assistant secretary or a certificate of the lack of any change thereto
since the Closing Date or, in the event that any such document has been
previously delivered by the Borrower to the Administrative Agent, a certificate
executed by a Responsible Officer of the Borrower indicating that no change has
occurred with respect to such document;

               (c)  Resolutions of its Board of Directors (i) approving and
authorizing the execution, delivery and performance of each of this Amendment,
and (ii) approving and authorizing the execution, delivery and performance of
the other Loan Documents to which it is a party and all transactions related
thereto, in each case certified as of the Effective Date by its corporate
secretary or an assistant secretary as being in full force and effect without
modification or amendments;

               (d)  Signature and incumbency certificates of its officers
executing this Amendment; and

               (e)  Such other instruments, documents and opinions in respect of
such matters as Administrative Agent shall reasonably request.

          3.5  Representations and Warranties; Default; Officer's Certificate.
               --------------------------------------------------------------
The representations and warranties set forth in Article VI of the Agreement
shall be true and correct, except to the extent such representations and
warranties are expressly made as of a specified date in which event such
representations and warranties shall be true and correct as of such specified
date, and no Event of Default or Unmatured Event of Default shall have occurred
or be continuing and Administrative Agent shall have received a certificate
executed by a Responsible Officer on behalf of Borrower, dated the Effective
Date stating that the representations and warranties set forth in Article VI of
                                                                  ----------
the Agreement are true and correct as of the date of the certificate, except to
the extent such representations and warranties are expressly made as of a
specified date in which event such representations and warranties shall be true
and correct as of such specified date, that no Event of Default or Unmatured
Event of Default has occurred and is continuing, and that the conditions of this
Section 3 hereof have been fully satisfied or waived (other than those
---------
conditions which require the satisfaction of the Administrative Agent).

          3.6  Fees.  Borrower shall have paid to Administrative Agent and the
               ----
Lenders all costs, fees and expenses (including, without limitation, reasonable
legal fees and expenses)

                                      -7-
<PAGE>

payable to Administrative Agent and the Lenders to the extent then due,
including, without limitation, pursuant to Section 6 of this Amendment.
                                           ---------

          3.7  Corporate Proceedings.  All corporate and legal proceedings and
               ---------------------
all instruments and agreements in connection with the execution and delivery of
this Amendment and the Master Trust Receivables Securitization shall be
satisfactory in form and substance to Administrative Agent and the Required
Lenders and Administrative Agent and all Lenders shall have received all
information and copies of all documents and papers, including records of
corporate proceedings, governmental approvals, good standing certificates and
bring-down telegrams or certificates, if any, which Administrative Agent or such
Lender reasonably may have requested in connection therewith, such documents and
papers where appropriate to be certified by proper corporate or Governmental
Authorities.

          Each Lender and the Administrative Agent hereby agrees that by its
execution and delivery of its signature page hereto, such Person approves of and
consents to each of the matters set forth in Section 3 which must be approved
                                             ---------
by, or which must be satisfactory to, the Required Lenders or such Person, as
the case may be; provided that, in the case of any agreement or document which
                 --------
must be approved by, or which must be satisfactory to, the Required Lenders,
Administrative Agent or Borrower shall have delivered a copy of such agreement
or document to such Person if so requested on or prior to the Effective Date.

          3.8  Master Trust Receivables Securitization Documents.  The
               -------------------------------------------------
Administrative Agent shall have received a certified copy of the Master Trust
Receivables Securitization Documents, including but not limited to:

          (a)  certified copies of the Certificate of Organization and Operating
Agreement of the Master Trust Receivables Subsidiary together with a good
standing certificate from the Secretary of State of the jurisdiction of its
organization and such other state in which it is qualified as a foreign
corporation to do business and where failure to be so qualified would have a
Material Adverse Effect and, to the extent generally available, a certificate or
other evidence of good standing as to payment of any applicable franchise or
similar taxes from the appropriate taxing authority of each such state, each
dated a recent date prior to the Closing Date; and

          (b)  a certified copy of the resolutions of the board of directors of
the Master Trust Receivables Subsidiary, in a form satisfactory to the
Administrative Agent, authorizing entry into the Master Trust Receivables
Securitization Documents and including the standing resolution authorizing the
distribution to the Borrower not less frequently than every five Local Business
Days (as defined in the Master Trust Pooling Agreement) of an amount equal to
the lesser of (i) the maximum amount that the Master Trust Receivables
Subsidiary is permitted to distribute in accordance with the Master Trust
Receivables Securitization Documents and (ii) the amount permitted pursuant to
Section 18-607 of the Delaware Limited Liability Company Act.

          SECTION 4. Waiver of Mandatory Prepayment.  The Lenders hereby waive
          ---------- ------------------------------
the provisions of Section 4.4(j) of the Credit Agreement, to the extent such
                  --------------
Section would

                                      -8-
<PAGE>

otherwise be applicable, in an amount not to exceed $35,000,000, with respect to
amounts received by the Borrower or any of its Subsidiaries as a purchase price
adjustment in connection with Nippon Polyurethane Industry Co. Ltd. (the "NPIC
                                                                          ----
Purchase Price Adjustment").
--------------------------

          SECTION 5.  References to and Effect on the Credit Agreement.  On and
          ----------  ------------------------------------------------
after the date hereof each reference in the Credit Agreement to "this
Agreement," "hereunder," "hereof," "herein," or words of like import, and each
reference to the Credit Agreement, as the case may be, in the Loan Documents and
all other documents (the "Ancillary Documents") delivered in connection with the
Credit Agreement shall mean and be a reference to the Credit Agreement as
amended hereby.

          Except as specifically amended above, the Credit Agreement, and the
other Loan Documents and all other Ancillary Documents shall remain in full
force and effect and are hereby ratified and confirmed.

          The execution, delivery and effectiveness of this Amendment shall not,
except as expressly provided herein, operate as a waiver of any right, power or
remedy of the Lenders or Administrative Agent under the Credit Agreement, the
Loan Documents or the Ancillary Documents.

          SECTION 6.   Fees, Costs and Expenses.  (a)  Borrower agrees to pay a
          ----------   ------------------------
fee to the Administrative Agent on or prior to the Effective Date on behalf of
each Lender which has executed and delivered this Amendment on or prior to 5:00
p.m. E.S.T. on December 21, 2000 equal to 12.5 bps times the sum of the
aggregate outstanding Commitment of such Lender as in effect under the Credit
Agreement on the Effective Date (after giving effect to the prepayments
contemplated hereby), such fee to be due and payable on the Effective Date; and
(b) Borrower also agrees to pay all reasonable costs and expenses in connection
with the negotiation, preparation, printing, typing, reproduction, execution and
delivery of this Amendment and all other documents furnished pursuant hereto or
in connection herewith, including without limitation, the reasonable fees and
out-of-pocket expenses of Winston & Strawn, special counsel to Administrative
Agent and any local counsel retained by Administrative Agent relative thereto or
the reasonable allocated costs of staff counsel as well as the fees and out-of-
pocket expenses of counsel, independent public accountants and other outside
experts retained by Administrative Agent in connection with the administration
of this Amendment.

          SECTION 7.   Miscellaneous.
          ----------   --------------

          7.1  Execution in Counterparts.  This Amendment may be executed in
               -------------------------
counterparts, each of which when so executed and delivered shall be deemed to be
an original and all of which taken together shall constitute but one and the
same instrument.

          7.2  Governing Law.  THIS AMENDMENT SHALL BE DEEMED TO BE A CONTRACT
               -------------
MADE UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS AND DECISIONS OF SAID STATE
WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS.

                           [signature page follows]

                                      -9-
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed and delivered by their duly authorized officers as of the day
and year first above written.

          [Executed by authorized officers of the Borrower, Holdings, the
          Lenders and Agents]

                                      -10-

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