EXHIBIT 10.29

Amended and Restated Pledge and Security Agreement

ThisAMENDED AND RESTATED PLEDGE AND SECURITY AGREEMENTis dated as of May 28, 2004, by UNION CARBIDE
CORPORATION, a New York corporation ("Carbide" or "Grantor") in favor of THE DOW CHEMICAL COMPANY, a
Delaware corporation ("TDCC" or "Lender").

W I T N E S S E T H:

WHEREAS, Lender and Grantor entered into that certain Pledge and Security Agreement dated as of March 25, 2003 (the "Pledge and Security Agreement"), and
amended the Pledge and Security Agreement pursuant to the First Amendment to Pledge and Security Agreement dated as of March 25, 2003, and pursuant to the Second Amendment to Pledge and
Security Agreement dated as of January 1, 2004;

WHEREAS,
Lender and Grantor are parties to the Amended and Restated Credit Agreement dated as of the date first above written (as the same may be hereafter amended, modified,
supplemented or restated from time to time, the"Credit Agreement") among TDCC, as lender, Carbide, as borrower, and the Subsidiary Guarantor
signatories thereto;

WHEREAS,
as a condition precedent to the effectiveness of the Credit Agreement, Grantor is required to execute and deliver this Agreement, which amends and restates in its entirety the
Pledge and Security Agreement as in effect immediately prior to the date hereof;

WHEREAS,
to secure the due and punctual payment and performance of, among other things, the obligations of Grantor arising under the Credit Agreement, Lender and Grantor wish to
substitute certain collateral granted to
secure the obligations under the Pledge and Security Agreement with a first priority perfected security interest in certain assets of Grantor, including cash collateral, subject to the terms and
conditions of this Agreement and the Credit Agreement as in effect on the Effective Date;

WHEREAS,
to the extent that existing collateral is released and replaced by the substituting Collateral, it is the intent of the parties such replacement of collateral be deemed an
exchange or substitution of property of equal or lesser value, that is consummated contemporaneously with the release of the existing collateral.

NOW,
THEREFORE, in consideration of the premises and to induce Lender to enter into the Credit Agreement and to induce Lender to make and/or continue extensions of credit to Grantor
thereunder, Grantor hereby agrees with Lender as follows:

ARTICLE I    DEFINED TERMS

Section
1.1.    Definitions.

(a)   Unless
otherwise defined herein, terms defined in the Credit Agreement and used herein have the meanings given to them in the Credit Agreement.

(b)   Terms
used herein that are defined in the UCC have the meanings given to them in the UCC, including the following which are capitalized herein:



52

---





(c)   The
following terms shall have the following meanings:

"Agreement" means this Amended and Restated Pledge and Security Agreement.

"Approved Deposit Account" means a Deposit Account maintained by Grantor with a Deposit Account Bank, which account is the subject of an
effective Deposit Account Control Agreement, and includes all monies on deposit therein and all certificates and instruments, if any, representing or evidencing such Deposit Account.

"Cash Collateral Account"has the meaning specified in the Credit Agreement.

"Cash Collateralized Credit Enhancements"has the meaning specified in the Credit Agreement.

"Cash Equivalents"has the meaning specified in the Credit Agreement.

"Credit Agreement"is defined in the preamble of this Agreement.

"Collateral" has the meaning specified in Section 2.1.

"Consolidated Net Tangible Assets" means total assets less (a) total current liabilities (excluding indebtedness for borrowed money
or guarantees thereof due within 12 months) and (b) goodwill, as reflected in the Company's most recent consolidated balance sheet preceding the relevant date of a determination, such
amount to be calculated in accordance with Section 4.04(9) of the Indenture.

"Debt Obligations" means any Obligations for borrowed money or any guarantee of such indebtedness for borrowed money.

"Deposit Account Bank" means a financial institution selected or approved by Lender and with respect to which Grantor has delivered to
Lender an executed Deposit Account Control Agreement.

"Deposit Account Control Agreement" means a letter agreement providing for "control" (as defined in Section 9-104 of
the UCC) of the Lender on an Approved Deposit Account, and in form and substance satisfactory to Lender, executed by Grantor, Lender and the relevant Deposit Account Bank.

"Deposited Cash Collateral"has the meaning specified in the Credit Agreement.

"Indenture" means the Indenture dated as of June 1, 1995 between Grantor and Chemical Bank, as trustee, as amended.

"Intercompany Note" means any promissory note evidencing Intercompany Indebtedness.

"LLC" means each limited liability company in which Grantor has an interest identified on Schedule 2.

"LLC Agreement" means each operating agreement with respect to an LLC, as each agreement has heretofore been and may hereafter be amended,
restated, supplemented or otherwise modified from time to time.

"Monthly Report"has the meaning specified in the Credit Agreement.

"Non-Debt Obligations" means all Obligations other than Debt Obligations.

"Obligations" means all advances, debts, liabilities, obligations, covenants and duties owing by Grantor to Lender of every type and
description, arising under (i) the Credit Agreement or under any other Loan Document, including all Loans, Credit Enhancement Obligations and the Univation Reimbursement Obligation, and all
fees and expenses and all interest, charges, expenses, fees, attorneys' fees and disbursements and other sums chargeable to Grantor under the Credit Agreement or any other Loan Document, or
(ii) any other transaction, arrangement, agreement, guarantee, indemnity or extension or enhancement of credit entered into or provided by Lender to or on behalf of Grantor from and after the
date hereof, in each case whether direct or indirect, absolute or contingent, or due or to become due.

"Partnership" means each partnership in which Grantor has an interest identified on Schedule 2.

"Partnership Agreement" means each partnership agreement governing a Partnership, as each such agreement has heretofore been and may
hereafter be amended, restated, supplemented or otherwise modified.

"Pledged Collateral" means, collectively, the Pledged Notes, the Pledged Stock, the Pledged Partnership Interests, the Pledged LLC
Interests, all certificates or other instruments representing any of the foregoing, all Security Entitlements of Grantor in respect of any of the foregoing, all dividends, interest distributions,
cash, warrants, rights,

53

---



instruments
and other property or Proceeds from time to time received, receivable or otherwise distributed in respect of or in exchange for any or all of the foregoing.

"Pledged LLC Interests" means all of Grantor's right, title and interest as a member of the LLCs set forth on Schedule 2(whichSchedule 2reflects the release of Step 1 Released Collateral pursuant
to Section 2.3 of this Agreement) and all of Grantor's right, title and interest in, to and under any LLC Agreement with respect thereto to which it is a party.

"Pledged Notes" means all right, title and interest of Grantor in the Instruments evidencing Intercompany Indebtedness (including any
Intercompany Notes) owed to Grantor, including all Indebtedness described onSchedule 2(which Schedule 2reflects the release of Step 1 Released
Collateral pursuant to Section 2.3 of this Agreement), issued by the obligors named
therein, and all interest, cash, Instruments and other property or Proceeds from time to time received, receivable or otherwise distributed in respect of or in exchange for any or all of such
Indebtedness.

"Pledged Partnership Interests" means all of Grantor's right, title and interest as a limited and/or general partner in the Partnerships
set forth onSchedule 2(whichSchedule 2reflects the release of Step 1 Released
Collateral pursuant to Section 2.3 of this Agreement) and all of Grantor's right, title and interest in, to and under any Partnership Agreements with respect thereto to which it is a party.

"Pledged Stock" means the shares of capital stock owned by Grantor identified on Schedule 2(whichSchedule 2reflects the release of Step 1 Released Collateral pursuant
to Section 2.3 of this Agreement);provided, however,that so long as doing otherwise would result in adverse tax consequences to Grantor, the
amount of outstanding capital stock of any Subsidiary that is not a domestic Subsidiary that is pledged or deemed to be pledged hereunder shall not exceed the amount of shares of capital stock
possessing up to but not exceeding 65% of the voting power of all classes of capital stock of such Subsidiary entitled to vote.

"Restricted Property" means any shares of capital stock of a Restricted Subsidiary owned by the Company or a Restricted Subsidiary.

"Restricted Subsidiary" means a Wholly Owned Subsidiary that has substantially all of its assets located in the United States and owns a
manufacturing facility located in the United States.

"Secured Obligations" means the Debt Obligations and Non-Debt Obligations owed by Grantor to Lender.

"Securities Act" means the Securities Act of 1933, as amended.

"Step 1 Released Collateral" means all of Grantor's right, title and interest in the Pledged Stock, Pledged Partnership Interests and
Pledged LLC Interests set forth on Schedule 3 hereto, and all right, title and interest of any Subsidiary Guarantor (as applicable) to the Pledged Stock, Pledged Partnership Interests and
Pledged LLC interests set forth on Schedule 3 hereto.

"Step 2 Released Collateral" means all of Grantor's right, title and interest in the Pledged Stock, Pledged Partnership Interests and
Pledged LLC Interests set forth on Schedule 4 hereto, and all right, title and interest of any Subsidiary Guarantor (as applicable) to the Pledged Stock, Pledged Partnership Interests and
Pledged LLC interests set forth on Schedule 4 hereto.

"UCC" means the Uniform Commercial Code as in effect in the State of New York on the date hereof;provided,
however,that in the event that, by reason of mandatory provisions of law, any or all of the attachment, perfection or priority of Lender's security interest in any Collateral
is governed by the Uniform Commercial Code as in effect in a jurisdiction other than the State of New York, the term "UCC" shall mean the Uniform Commercial Code as in effect on the date hereof in
such other jurisdiction for purposes of the provisions hereof relating to such attachment, perfection or priority and for purposes of definitions related to such provisions.

"Wholly Owned Subsidiary" means a Subsidiary of which 100% of the outstanding voting stock or equity securities are owned directly or
indirectly by Grantor.

Section
1.2.    Certain Other Terms.

(a)   The
words "herein", "hereof",
"hereto" and "hereunder" and similar words refer to this Agreement as a whole and not to any particular
Article, Section, subsection or clause in this Agreement.

54

---



(b)   References
herein to Schedule, Article, Section, subsection or clause refer to the appropriate Schedule to, or Article, Section, subsection or clause in this Agreement.

(c)   The
meanings given to terms defined herein shall be equally applicable to both the singular and plural forms of such terms.

(d)   Any
reference in this Agreement to a Loan Document shall include all appendices, exhibits and schedules thereto, and, unless specifically stated otherwise, all
amendments, restatements, supplements or other modifications thereto, and as the same may be in effect at any and all times such reference becomes operative.

(e)   The
term "including" means "including without limitation" except when used in the computation of time periods.

(f)    The
terms "Lender" and "Grantor" include their respective successors.

(g)   References
in this Agreement to any statute shall be to such statute as amended or modified and in effect from time to time.

ARTICLE II    GRANT OF SECURITY INTEREST

Section
2.1.    Collateral. For the purposes of this Agreement, all of the following property now owned by Grantor or in which Grantor now has any
right, title or interests is collectively referred to as the "Collateral":



Notwithstanding
anything to the contrary contained above: (1) to the extent the security interest created by this Agreement is securing Debt Obligations, such security interest shall not extend
to, and the term "Collateral" shall not include, any Restricted Property (except to the extent the aggregate Debt Obligations secured by Restricted Property hereunder does not exceed at any time
outstanding 10% of Consolidated Net Tangible Assets); (2) to the extent a grant of a security interest in any Pledged "Collateral" would constitute a violation or breach of any other agreement
by which Grantor is bound and acceptable arrangements, such as consents or amendments, cannot be made to avoid a violation or breach of such other agreement by which Grantor is bound, such Pledged
Collateral will be excluded from "Collateral"; and (3) to the extent a grant of a security interest in any Deposit Account for which the relevant depository bank's jurisdiction is not in the
United States and acceptable arrangements cannot be made in the United States, such Deposit Account will be excluded from Collateral. The parties hereto agree that the amount of Debt Obligations that
may be secured under this Agreement is limited under clause (1) above, as required under the Indenture, to only a portion of the aggregate Debt Obligations owing or which may become owing by
Grantor to Lender and that any payments or repayments of such Debt Obligations shall be and be deemed to be applied first to the portion of such Debt Obligations that is not secured hereby, it being
the parties' intent that the portion of such Debt Obligations last remaining unpaid shall be secured hereby.

55

---



Section
2.2.    Grant of Security Interest in Collateral. Subject to the limitations expressly set forth in
Section 2.1, Grantor, as security for the full, prompt and complete payment and performance when due (whether at stated maturity, by acceleration or otherwise) of
the Secured Obligations, hereby collaterally pledges to Lender and grants to Lender a Lien on and security interest in, all of its right, title and interest in, to and under the Collateral.

Section 2.3.    Release
of Collateral.



ARTICLE III    REPRESENTATIONS AND WARRANTIES

To induce Lender to enter into the Credit Agreement, Grantor hereby represents and warrants to Lender that:

Section
3.1.    Title; No Other Liens. Except for the Lien granted to Lender pursuant to this Agreement and the other Liens permitted to exist on
the Collateral under the Credit Agreement, (a) Grantor is the record and beneficial owner of the Pledged Collateral pledged by it hereunder constituting Instruments or certificated securities
and owns each other item of Collateral in which a Lien is granted by it hereunder and (b) all such Collateral is owned free and clear of any and all Liens.

Section
3.2.    Perfection and Priority. The security interest granted pursuant to this Agreement will constitute a valid and continuing perfected
security interest in favor of Lender in the Collateral for which perfection is governed by the UCC upon (i) the completion of the filings which have been delivered to Lender and completed in
duly executed form, (ii) the delivery to Lender of all Collateral consisting of Instruments and certificated securities, in each case properly endorsed for transfer to Lender or in blank, and
(iii) the execution of Deposit Account Control Agreements with respect to all Deposit Accounts and Cash Collateral Accounts. Such security interest will be prior to all other Liens on the
Collateral except for Customary Permitted Liens which have priority over Lender's Lien by operation of law or otherwise as permitted under the Credit Agreement or any Loan Document.

Section
3.3.    State of Incorporation; Chief Executive Office. On the date hereof Grantor's jurisdiction of organization, organizational
identification number, if any, and the location of Grantor's chief executive office or sole place of business is specified onSchedule 1.

Section
3.4.    Pledged Collateral.



56

---





ARTICLE IV    COVENANTS

As long as any of the Obligations (other than contingent indemnification Obligations not yet due and payable) remain outstanding, unless the Lender otherwise
consents in writing, Grantor agrees with Lender that:

Section
4.1.    Generally. Grantor shall (a) except for the security interest created by this Agreement, not create or suffer to exist any
Lien upon or with respect to any of the Collateral, except Liens permitted under the Credit Agreement; (b) not use or permit any Collateral to be used unlawfully or in violation of any
provision of this Agreement, any other Loan Document, any Requirement of Law or any policy of insurance covering the Collateral; (c) not sell, transfer or assign (by operation of law or
otherwise) any Collateral except as permitted under the Credit Agreement; (d) not enter into any agreement or undertaking restricting the right or ability of Grantor or Lender to sell, assign
or transfer any of the Collateral if such restriction would have a Material Adverse Effect; and (e) promptly notify Lender of its entry into any agreement or assumption of undertaking that
restricts the ability to sell, assign or transfer any of the Collateral regardless of whether or not it has a Material Adverse Effect.

Section
4.2.    Maintenance of Perfected Security Interest; Further Documentation.



Section 4.3.    Changes
in Locations, Name, Etc.



57

---





Grantor
will keep and maintain at its own cost and expense satisfactory and complete records of the Collateral, including a record of all payments received and all credits granted with
respect to the Collateral and all other dealings with the Collateral as is consistent with past practices.

Section
4.4.    Pledged Collateral.

(a)   Grantor
will deliver to Lender, all certificates, Chattel Paper or Instruments representing or evidencing any Pledged Collateral, in suitable form for transfer by
delivery or, as applicable, accompanied by Grantor's endorsement, where necessary, or duly executed instruments of transfer or assignment in blank, all in form and substance reasonably satisfactory to
Lender. Lender shall have the right, upon the occurrence and during the continuance of an Event of Default, in its discretion and without notice to Grantor, to transfer to or to register in its name
or in the name of its nominees any or all of the Pledged Collateral. Lender shall have the right to, upon the occurrence and during the continuance of an Event of Default, exchange certificates or
instruments representing or evidencing any of the Pledged Collateral for certificates or instruments of smaller or larger denominations.

(b)   Except
as provided in Article V, Grantor shall be entitled to receive all cash dividends paid in respect of the Pledged Collateral
(other than liquidating dividends constituting a distribution of capital) with respect to the Pledged Collateral. Any sums paid upon or in respect of any of the Pledged Collateral upon the liquidation
or dissolution of any issuer of any of the Pledged Collateral, any distribution of capital made on or in respect of any of the Pledged Collateral or any property distributed upon or with respect to
any of the Pledged Collateral pursuant to the recapitalization or reclassification of the capital of any issuer of Pledged Collateral or pursuant to the reorganization thereof shall, unless otherwise
subject to a perfected security interest in favor of Lender, be delivered to Lender to be held by it hereunder as additional collateral security for the Secured Obligations or be deposited into an
Approved Deposit Account. If any sums of money or property so paid or distributed in respect of any of the Pledged Collateral shall be received by Grantor, Grantor shall, to the extent such money is
not otherwise deposited into an Approved Deposit Account and until such money or property is paid or delivered to Lender, hold such money or property in trust for Lender, segregated from other funds
of Grantor, as additional security for the Secured Obligations.

(c)   Except
as provided in Article V, Grantor will be entitled to exercise all voting, consent and corporate rights with respect to the
Pledged Collateral and to give consents, waivers or ratifications in respect thereof;provided, however,that no vote shall be cast, consent given or
right exercised or other action taken by Grantor which would have a Material Adverse Effect or which would be inconsistent with or breach the terms of the Credit Agreement, this Agreement or any other
Loan Document.

(d)   Grantor
will not agree to any amendment of an LLC Agreement or Partnership Agreement that in any way adversely affects the perfection of the security interest of Lender
in the Pledged Partnership Interests or Pledged LLC Interests pledged by Grantor hereunder, including electing to treat the membership interest or partnership interest of Grantor as a security under
Section 8-103 of the UCC.

Section
4.5.    Approved Deposit Accounts. Except as otherwise permitted by the Credit Agreement, if required by Lender under the Credit Agreement,
Grantor will (i) deposit in an Approved Deposit Account all cash and all Proceeds received by Grantor, and (ii) not establish or maintain any Deposit Account other than with a Deposit
Account Bank.

Section
4.6.    Payment of Taxes and Other Obligations. Grantor will, to the extent required under the Credit Agreement, pay and discharge or
otherwise satisfy at or before maturity or before they become delinquent, as the case may be, all taxes, assessments and governmental charges or levies imposed upon the Collateral or in respect of
income or profits therefrom, as well as all claims of any kind (including claims for labor, materials and supplies) against or with respect to the Collateral, except that no such charge need be paid
if the amount or validity thereof is currently being contested in good faith by appropriate proceedings, reserves in conformity with GAAP with respect thereto have been provided on the books of
Grantor and such proceedings could not reasonably be expected to result in the sale, forfeiture or loss of any material portion of the Collateral or any interest therein.

58

---





ARTICLE V    REMEDIAL PROVISIONS

Section 5.1.    Code and Other Remedies. During the continuance of an Event of Default, Lender may exercise, in addition to
all other rights and remedies granted to it in this Agreement and in any other instrument or agreement securing, evidencing or relating to the Secured Obligations, all rights and remedies of a secured
party under the UCC or any other applicable law. Without limiting the generality of the foregoing, Lender, without demand of performance or other demand, presentment, protest, advertisement or notice
of any kind (in each case except any required by law referred to below) to or upon Grantor or any other Person (all and each of which demands, defenses, advertisements and notices are hereby waived),
may in such circumstances forthwith collect, receive, appropriate and realize upon the Collateral, or any part thereof, and/or may forthwith sell, lease, assign, give option or options to purchase, or
otherwise dispose of and deliver the Collateral or any part thereof (or contract to do any of the foregoing), in one or more parcels at public or private sale or sales, at any exchange, broker's board
or office of Lender or elsewhere upon such terms and conditions as it may deem advisable and at such prices as it may deem best, for cash or on credit or for future delivery without assumption of any
credit risk. Lender shall have the right upon any such public sale or sales, and, to the extent permitted by law, to purchase the whole or any part of the Collateral so sold, free of any right or
equity of redemption in Grantor, which right or equity is hereby waived and released. Lender shall apply the net proceeds of any action taken by it pursuant to this
Section 5.1, after deducting all reasonable costs and expenses of every kind incurred in connection therewith or incidental to the care or safekeeping of any of the
Collateral or in any way relating to the Collateral or the rights of Lender hereunder, including reasonable attorneys' fees and disbursements, to the payment in whole or in part of the Secured
Obligations, in such order as the Credit Agreement shall proscribe, and only after such application and after the payment by Lender of any other amount required by any provision of law, need Lender
account for the surplus, if any, to Grantor. To the extent permitted by applicable law, Grantor waives all claims, damages and demands it may acquire against Lender arising out of the exercise by it
of any rights hereunder. If any notice of a proposed sale or other disposition of Collateral shall be required by law, such notice shall be deemed reasonable and proper if given at least
10 days before such sale or other disposition.

Section
5.2.    Pledged Collateral.

(a)   During
the continuance of an Event of Default, upon notice by Lender to Grantor, (i) Lender shall have the right to receive any and all cash dividends, payments
or other Proceeds paid in respect of the Pledged Collateral and make application thereof to the Obligations in the order set forth in the Credit Agreement, and (ii) Lender or its nominee may
exercise (A) all voting, consent, corporate and other rights pertaining to the Pledged Collateral at any meeting of shareholders, partners or members, as the case may be, of the relevant issuer
or issuers of Pledged Collateral or otherwise and (B) any and all rights of conversion, exchange and subscription and any other rights, privileges or options pertaining to the Pledged
Collateral as if it were the absolute owner thereof (including the right to exchange at its discretion any and all of the Pledged Collateral upon the merger, consolidation, reorganization,
recapitalization or other fundamental change in the corporate structure of any issuer of Pledged Securities, the right to deposit and deliver any and all of the Pledged Collateral with any committee,
depositary, transfer agent, registrar or other designated agency upon such terms and conditions as Lender may determine), all without liability except to account for property actually received by it,
but Lender shall have no duty to Grantor to exercise any such right, privilege or option and shall not be responsible for any failure to do so or delay in so doing.

(b)   In
order to permit Lender to exercise the voting and other consensual rights which it may be entitled to exercise pursuant hereto and to receive all dividends and other
distributions which it may be entitled to receive hereunder, (i) upon the occurrence and during the continuance of an Event of Default, Grantor shall promptly execute and deliver (or cause to
be executed and delivered) to Lender all such proxies, dividend payment orders and other instruments as Lender may from time to time reasonably request and (ii) without limiting the effect of
clause (i) above, Grantor hereby grants to Lender an irrevocable proxy to vote all or any part of the Pledged Collateral and to exercise all other rights, powers, privileges and remedies to
which a holder of the Pledged Collateral would be entitled (including giving or withholding written consents of shareholders, partners or members, as the case may be, calling special meetings of
shareholders, partners or members, as the case may be, and voting at such meetings), which proxy shall be effective, automatically and without the necessity of any action (including any transfer of
any Pledged Collateral on the record books of the issuer thereof) by any other person (including the issuer of such Pledged Collateral or any officer or agent thereof) during the continuance of an
Event of Default

59

---



and
which proxy shall only terminate upon the payment in full of the Secured Obligations (in respect of Loans and Reimbursement Obligations and interest and fees thereon and expenses related thereto)
and the termination of the Commitment.

(c)   Grantor
hereby expressly authorizes and instructs each issuer of any Pledged Collateral pledged hereunder by Grantor to (i) comply with any instruction received
by it from Lender in writing that (A) states that an Event of Default has occurred and is continuing and (B) is otherwise in accordance with the terms of this Agreement, without any
other or further instructions from Grantor, and Grantor agrees that such issuer shall be fully protected in so complying and (ii) unless otherwise expressly permitted hereby, pay any dividends
or other payments with respect to the Pledged Collateral directly to an Approved Deposit Account approved for such purpose by Lender.

Section
5.3.    Sale of Pledged Collateral.

(a)   Grantor
recognizes that Lender may be unable to effect a sale of any or all the Pledged Collateral by reason of certain prohibitions contained in the Securities Act and
applicable state securities laws or otherwise or may determine that a public sale is impracticable or not commercially reasonable and, accordingly, may resort to one or more private sales thereof to a
restricted group of purchasers which will be obliged to agree, among other things, to acquire such securities for their own account for investment and not with a view to the distribution or resale
thereof. Grantor acknowledges and agrees that any such private sale may result in prices and other terms less favorable than if such sale were a public sale and, notwithstanding such circumstances,
agrees that any such private sale shall be deemed to have been made in a commercially reasonable manner. Lender shall be under no obligation to delay a sale of any of the Pledged Collateral for the
period of time necessary to permit the issuer thereof to register such securities for public sale under the Securities Act, or under applicable state securities laws, even if such issuer would agree
to do so.

(b)   Grantor
agrees to use its commercially reasonable efforts to do or cause to be done all such acts as may be necessary to make such sale or sales of all or any portion of
the Pledged Collateral pursuant to this Section 5.3 valid and binding and in compliance with any and all applicable Requirements of Law, provided, however, that
Grantor shall not be obligated to register any portion of the Pledged Collateral under the provisions of the Securities Act. Grantor further agrees that a breach of any of the covenants contained in
this Section 5.3 will cause irreparable injury to Lender, that Lender has no adequate remedy at law in respect of such breach and, as a consequence, that each and
every covenant contained in this Section 5.3 shall be specifically enforceable against Grantor, and Grantor hereby waives and agrees not to assert any defenses
against an action for specific performance of such covenants except for a defense that no Event of Default has occurred and is continuing.

Section
5.4.    Deficiency. Grantor shall remain liable for any deficiency if the proceeds of any sale or other disposition of the Collateral are
insufficient to pay the Secured Obligations and the fees and disbursements of any attorneys employed by Lender to collect such deficiency.

ARTICLE VI    POWER OF ATTORNEY

Section
6.1.    Lender's Appointment as Attorney-in-Fact.

(a)   Grantor
hereby irrevocably constitutes and appoints Lender and any officer or agent thereof, with full power of substitution, as its true and lawful
attorney-in-fact with full irrevocable power and authority in the place and stead of Grantor and in the name of Grantor or in its own name, for the purpose of carrying out the
terms of this Agreement, to take any and all appropriate action and to execute any and all documents and instruments which may be necessary or desirable to accomplish the purposes of this Agreement,
and, without limiting the generality of the foregoing, Grantor hereby gives Lender the power and right, on behalf of Grantor, without notice to or assent by Grantor, to do any or all of the following:



60

---





Anything
in this Section 6.1(a) to the contrary notwithstanding, Lender agrees that it will not exercise any rights under the power of attorney provided for in this
Section 6.1(a) unless an Event of Default shall have occurred and be continuing.

(b)   If
Grantor fails to perform or comply with any of its agreements contained herein, and such failure constitutes an Event of Default, Lender (so long as such Event of
Default is continuing), at its option, but without any obligation so to do, may perform or comply, or otherwise cause performance or compliance, with such agreement.

(c)   The
expenses of Lender incurred in connection with actions undertaken as provided in this Section 6.1, together with interest thereon at a rate per annum equal to
the Applicable Rate at which interest would then be payable on past due Loans under the Credit Agreement, from the date of payment by Lender to the date reimbursed by Grantor, shall be payable by
Grantor to Lender on demand.

(d)   Grantor
hereby ratifies all that said attorneys shall lawfully do or cause to be done by virtue hereof. All powers, authorizations and agencies contained in this
Agreement are coupled with an interest and are irrevocable until this Agreement is terminated and the security interests created hereby are released.

Section
6.2.    Duty of Lender. Lender's sole duty with respect to the custody, safekeeping and physical preservation of the Collateral in its
possession shall be to deal with it in the same manner as Lender deals with similar property for its own account. Subject to applicable law, neither Lender nor any of its officers, directors,
employees or agents shall be liable for failure to demand, collect or realize upon any of the Collateral or for any delay in doing so or shall be under any obligation to sell or otherwise dispose of
any Collateral upon the request of Grantor or any other Person or to take any other action whatsoever with regard to the Collateral or any part thereof. The powers conferred on Lender hereunder are
solely to protect Lender's interest in the Collateral and
shall not impose any duty upon Lender to exercise any such powers. Lender shall be accountable only for amounts that Lender actually receives as a result of the exercise of such powers, and neither
Lender nor any of its officers, directors, employees or agents shall be responsible to Grantor for any act or failure to act hereunder.

Section
6.3.    Execution of Financing Statements. Grantor authorizes Lender to file or record financing statements and other filing or recording
documents or instruments with respect to the Collateral in such form and in such offices as Lender reasonably determines appropriate to perfect the security interests of Lender under this Agreement. A
photographic or other reproduction of this Agreement shall be sufficient as a financing statement or other filing or recording document or instrument for filing or recording in any jurisdiction.

61

---



ARTICLE VII    MISCELLANEOUS

Section 7.1.    Amendments in Writing. None of the terms or provisions of this Agreement may be waived, amended,
supplemented or otherwise modified except in accordance with Section 10.1 of the Credit Agreement.

Section
7.2.    Notices. All notices, requests and demands to or upon Lender or Grantor hereunder shall be effected in the manner provided for in
Section 10.6 of the Credit Agreement.

Section
7.3.    No Waiver by Course of Conduct; Cumulative Remedies. Lender shall not by any act (except by a written instrument pursuant to
Section 7.1), delay, indulgence, omission or otherwise be deemed to have waived any right or remedy hereunder or to have acquiesced in any Default or Event of Default. No failure to exercise,
nor any delay in exercising, on the part of Lender any right, power or privilege hereunder shall operate as a waiver thereof. No single or partial exercise of any right, power or privilege hereunder
shall preclude any other or further exercise thereof or the exercise of any other right, power or privilege. A waiver by Lender of any right or remedy hereunder on any one occasion shall not be
construed as a bar to any right or remedy which Lender would otherwise have on any future occasion. The rights and remedies herein provided are cumulative, may be exercised singly or concurrently and
are not exclusive of any other rights or remedies provided by law.

Section
7.4.    Successors and Assigns. This Agreement shall be binding upon the successors and assigns of Grantor and shall inure to the benefit
of Lender and its successors and assigns; provided, however, that Grantor may not assign, transfer or delegate any of its rights or obligations under this Agreement without the prior written consent
of Lender.

Section
7.5.    Counterparts. This Agreement may be executed by one or more of the parties to this Agreement on any number of separate counterparts
(including by telecopy), and all of said counterparts taken together shall be deemed to constitute one and the same agreement.

Section
7.6.    Severability. Any provision of this Agreement which is prohibited or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any
jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction.

Section
7.7.    Section Headings. The Article and Section titles contained in this Agreement are and shall be without substantive meaning or
content of any kind whatsoever and are not part of the agreement of the parties hereto.

Section
7.8.    Entire Agreement. This Agreement together with the other Loan Documents represents the entire agreement of the parties and
supersedes all prior agreements and understandings relating to the subject matter hereof.

Section
7.9.    Governing Law. This agreement and the rights and obligations of the parties hereto shall be governed by, and construed and
interpreted in accordance with, the law of the state of New York.

Section
7.10.    Release of Collateral; Termination.

(a)   Upon
termination of the Commitment and payment and satisfaction in full of all Loans, Reimbursement Obligations and all other Obligations which have matured and which
are then due and payable, the Collateral (other than any Collateral previously released) shall automatically be released from the Lien created hereby and this Agreement and all obligations (other than
those expressly stated to survive such termination) of Lender and Grantor hereunder shall immediately terminate, all without delivery of any instrument or performance of any act by any party, and all
rights to the Collateral shall revert to Grantor. At the request and sole expense of Grantor following any such termination, Lender shall deliver to Grantor any Collateral of Grantor held by Lender
hereunder and execute and deliver to Grantor such documents as Grantor shall reasonably request to evidence such termination.

62

---



(b)   If
any of the Collateral shall be sold or disposed of by Grantor in a transaction permitted by the Credit Agreement (including by operation of Lender's written consent
or waiver), the Collateral so sold or disposed of shall be automatically released from the Lien created hereby and, in connection therewith, Lender, at the request and sole expense of Grantor, shall
execute and deliver to Grantor all releases or other documents reasonably necessary or desirable for the release of the Lien created hereby on such Collateral.

Section
7.11.    Reinstatement. Grantor further agrees that, if any payment made by Grantor or any other Person and applied to the Obligations is
at any time annulled, avoided, set aside, rescinded, invalidated, declared to be fraudulent or preferential or otherwise required to be refunded or repaid, or the proceeds of Collateral are required
to be returned by Lender to such person, its estate, trustee, receiver or any other party, including Grantor, under any bankruptcy law, state or federal law, common law or equitable cause, then, to
the extent of such payment or repayment, any Lien or other Collateral securing such liability shall be and remain in full force
and effect, as fully as if such payment had never been made or, if prior thereto the Lien granted hereby or other Collateral securing such liability hereunder shall have been released or terminated),
such Lien or other Collateral shall be reinstated in full force and effect, and such prior release or termination shall not diminish, release, discharge, impair or otherwise affect any Lien or other
Collateral securing the obligations of Grantor in respect of the amount of such payment.

IN
WITNESS WHEREOF, each of the undersigned has caused this Pledge and Security Agreement to be duly executed and delivered as of the date first above written.

|                                              |  |                   |  |                                                      | UNION CARBIDE CORPORATION
|--------------------------------------------- |  | ----------------- |  | ---------------------------------------------------- | -------------------------
|                                              |  |                   |  |                                                      |                          
|                                              |  |                   |  |                                                      | By:                      
|                                              |  |                   |  |                                                      |                          
|                                              |  |                   |  |                                                      |                          
|ACCEPTED AND AGREED:
THE DOW CHEMICAL COMPANY |  |                   | 
|By:                                           |  | /s/J. P. REINHARD |  |                                                      |                          
|                                              |  | Name:             |  | J. P. Reinhard                                       |                          
|                                              |  | Title:            |  | Executive Vice President and Chief Financial Officer |                          

63

---



Amended and Restated Pledge and Security Agreement

---

Schedule 1

State of Incorporation; Principal Place of Business

Union
Carbide Corporation

Jurisdiction
of organization: New York

I.R.S.
Employer Identification Number: 13-1421730

Principal
place of business

400
West Sam Houston Parkway South

Houston,
Texas 77042

Phone
No: (713)-978-2016 / Fax No: (713)-978-2394

64

---



Schedule 2

Pledged Collateral1

|Issuer                                                    |  | Holder |  | Shares      |  | Class (if
known) |  | %
Ownership
|--------------------------------------------------------- |  | ------ |  | ----------- |  | ---------------- |  | -----------
|Dow International Holdings Company                        |  | UCC    |  | 831         |  | Common           |  | 7.4        
|Dow Chemical Canada Inc.°                                 |  | UCC    |  | 64,444      |  | Common           |  | 11.2       
|Modeland International Holdings Inc.°                     |  | UCC    |  |             |  | Class A Common   |  | 41         
|Dow Química Argentina S.A.°                               |  | UCC    |  | 4,933,170   |  | Common           |  | 11.99      
|Dow Venezuela, C.A.°                                      |  | UCC    |  |             |  |                  |  | 19.61      
|Dow Química Mexicana S.A. de C.V.°                        |  |        |  |             |  | UCC              |  | 15.42      
|EQUATE Petrochemical Company K.S.C.°                      |  | UCC    |  | 971,700,000 |  | Common           |  | 45         
|EQUATE Marketing Company E.C.°                            |  | UCC    |  | 250,500     |  | Ordinary         |  | 50.1       
|Union Carbide Subsidiary C, Inc.2                         |  | UCC    |  | 1,000       |  | Common           |  | 100        
|Catalysts, Adsorbents and Process Systems, Inc.3          |  | UCC    |  | 5           |  | Common           |  | 100        
|Union Carbide Chemicals & Plastics Technology Corporation |  | UCC    |  | 100         |  | Common           |  | 100        

None.

|Issuer    |  | Holder |  | % Ownership
|--------- |  | ------ |  | -----------
|UCMG LLC. |  | UCC    |  | 100        

---

65

---



4.     Pledged
Notes



66

---



Schedule 3

Step 1 Released Collateral


Collateral Held by Union Carbide Corporation

Asian
Acetyls Co, Ltd.
Nippon Unicar Company Limited
Optimal Chemicals (Malaysia) Sdn Bhd
Optimal Olefins (Malaysia) Sdn Bhd
Union Carbide Pan America, Inc.
UCAR Emulsions Systems International, Inc.
UCAR Pipeline Inc
UCAR Louisiana Pipeline Company
Union Carbide Caribe LLC
Union Carbide Inter-America, Inc. (DE)
American Acetyls
Amerchol Corporation
Chemicals Marine Fleet, Inc.
Global Industrial Corporation
UC Finco Inc.
Union Carbide Asia Pacific, Inc.
Union Carbide Inter-America, Inc. (NJ)
Union Carbide Polyolefins Development Company, Inc.
Union Carbide Middle East Limited
Union Carbide Ethylene Oxide / Glycol Company
Seadrift Pipeline Corporation
Carbide Chemical (Thailand) Limited
Union Carbide Asia Limited (Hong Kong Corp)
National Carbon Company Pakistan (Private) Limited (Pakistan Corp)
PT Union Carbide Indonesia
Union Carbide Formosa Company, Ltd (Taiwan Corp)
Union Carbide Ibérica, S.A. (Spain Corp.)
Union Carbide Pakistan (Private) Limited (Pakistan Corp)
Westbridge Insurance Ltd (Bermuda Corp)
Industrias Carlisil, S.A. (Mexico Corp)
Servicios de Químicos Agricolas, S.A. (Mexico Corp)
Mineracao Ligura Ltda. (Brazil Corp)
Mineracao Sao Damaso Ltda. (Brazil Corp)
Union Carbide Commercial Nicaragua, S.A. (Nicaragua Corp)
Union Polymers Sdn Bhd (Malaysia Corp)
Union Carbide Customer Services Pte. Ltd. (Singapore Corp)
GlenGate Insurance Brokers Limited (Ireland Corp)
UCAR Vanor (Proprietary) Limited (South African Corp)
Dow Chemical (Malaysia) Sdn. Bhd. (Malaysia Corp)
Union Carbide South Africa (Proprietary) Limited (South Africa Corp)
Union Carbide Philippines (Far East), Inc. (Philippines Corp)
Codium Desenvolvimento de Industrias Minerais Ltda. (Brazil Corp)
Union Carbide Foreign Sales Corporation (Virgin Islands Corp)
Union Carbide China Investment Co. Ltd.

67

---




Collateral Held by Catalysts, Adsorbents and Process Systems, Inc.

UOP
LLC


Collateral Held by Union Carbide Subsidiary C, Inc.

Univation
Technologies LLC


Collateral Held by UCMG LLC

Optimal
Glycols (Malaysia) Sdn. Bhd.

68

---



Schedule 4

Step 2 Released Collateral



Note:
After the release of the Step 2 Released Collateral the Pledged Stock will be as follows:

|Issuer                                                    |  | Holder |  | Shares |  | Class (if
known) |  | %
Ownership
|--------------------------------------------------------- |  | ------ |  | ------ |  | ---------------- |  | -----------
|Dow International Holdings Company                        |  | UCC    |  | 831    |  | Common           |  | 7.4        
|Dow Chemical Canada Inc.°                                 |  | UCC    |  | 64,444 |  | Common           |  | 11.2       
|Modeland International Holdings Inc.°                     |  | UCC    |  |        |  | Class A Common   |  | 41         
|Union Carbide Subsidiary C, Inc.                          |  | UCC    |  | 1,000  |  | Common           |  | 100        
|Union Carbide Chemicals & Plastics Technology Corporation |  | UCC    |  | 100    |  | Common           |  | 100        

69

---



QuickLinks