EXHIBIT 3.60

                          CERTIFICATE OF INCORPORATION
                                       OF
                            WESTLAKE CA&O CORPORATION

         1. The name of the corporation is Westlake CA&O Corporation.

         2. The address of its registered office in the State of Delaware is
Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County
of New Castle. The name of its registered agent at such address is The
Corporation Trust Company.

         3. The nature of the business or purposes to be conducted or promoted
is:

         To engage in any lawful act or activity for which corporations may be
organized under the General Corporation Law of Delaware.

         To manufacture, purchase or otherwise acquire, invest in, own, mortgage
pledge, sell, assign and transfer or otherwise dispose of, trade, deal in and
deal with goods, wares and merchandise and personal property of every class and
description.

         To acquire, and pay for in cash, stock or bonds of this corporation or
otherwise, the good will, rights, assets and property, and to undertake or
assume the whole or any part of the obligations or liabilities of any person,
firm, association or corporation.

         To acquire, hold, use, sell, assign, lease, grant licenses in respect
of, mortgage or otherwise dispose of letters patent of the United States or any
foreign country, patent rights, licenses and privileges, inventions,
improvements and processes, copyrights, trademarks and trade names, relating to
or useful in connection with any business of this corporation.

         To acquire by purchase, subscription or otherwise, and to receive,
hold, own, guarantee, sell, assign, exchange, transfer, mortgage, pledge or
otherwise dispose of or deal in and with any of the shares of the capital stock,
or any voting trust certificates in respect of the shares of capital stock,
scrip, warrants, rights, bonds, debentures, notes, trust receipts, and other
securities, obligations, choses in action and evidences of indebtedness or
interest issued or created by any corporations, joint stock companies,
syndicates, associations, firms, trusts or persons, public or private, or by the
government of the United States of America, or by any foreign government, or by
any state, territory, province, municipality or other political subdivision or
by any governmental agency, and as owner thereof to possess and exercise all the
rights, powers and privileges of ownership, including the right to execute
consents and vote thereon, and to do any and all acts and things necessary or
advisable for the preservation, protection, improvement and enhancement in value
thereof.

         To borrow or raise money for any of the purposes of the corporation
and, from time to time without limit as to amount, to draw, make, accept,
endorse, execute and issue promissory notes, drafts, bills of exchange,
warrants, bonds, debentures and other negotiable or non-negotiable instruments
and evidences of indebtedness, and to secure the payment of any




thereof and of the interest thereon by mortgage upon or pledge, conveyance or
assignment in trust of the whole or any part of the property of the Corporation,
whether at the time owned or thereafter acquired, and to sell, pledge or
otherwise dispose of such bonds or other obligations of the corporation for its
corporate purposes.

         To purchase, receive, take by grant, gift, devise, bequest or
otherwise, lease, or otherwise acquire, own, hold, improve, employ, use and
otherwise deal in and with real or personal property, or any interest therein,
wherever situated, and to sell, convey, lease, exchange, transfer or otherwise
dispose of, or mortgage or pledge, all or any of the corporation's property and
assets, or any interest therein, wherever situated.

         In general, to possess and exercise all the powers and privileges
granted by the General Corporation Law of Delaware or by any other law of
Delaware or by this Certificate of Incorporation together with any powers
incidental thereto, so far as such powers and privileges are necessary or
convenient to the conduct, promotion or attainment of the business or purposes
of the corporation.

         The business and purposes specified in the foregoing clauses shall,
except where otherwise expressed, be in nowise limited or restricted by
reference to, or inference from, the terms of any other clause in this
Certificate of Incorporation, but the business and purposes specified in each of
the foregoing clauses of this article shall be regarded as independent business
and purposes.

         4. The total number of shares of stock which the corporation shall have
authority to issue is: One Thousand (1,000); all of such shares shall be without
par value.

         5. The name and mailing address of each incorporator is as follows:

<Table>
<Caption>

                   NAME                      MAILING ADDRESS
                   ----                      ---------------
                                    
               J. McBurnett            811 Dallas Ave., Houston, TX 77002
               B. Cleveland            811 Dallas Ave., Houston, TX 77002
               D. Singleton            811 Dallas Ave., Houston, TX 77002
</Table>

         The name and mailing address of each person who is to serve as a
director until the first annual meeting of the stockholders or until a successor
is elected and qualified, is as follows:

<Table>
<Caption>

                 NAME                       MAILING ADDRESS
                 ----                       ---------------
                                    
               T.T. Chao               2801 Post Oak Blvd., Suite 600
                                       Houston, TX 77056
</Table>

         6. The corporation is to have perpetual existence.

         7. In furtherance and not in limitation of the powers conferred by
statute, the board of directors is expressly authorized:


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         To make, alter or repeal the by-laws of the corporation.

         To authorize and cause to be executed mortgages and liens upon the real
and personal property of the corporation.

         To set apart out of any of the funds of the corporation available for
dividends a reserve or reserves for any proper purpose and to abolish any such
reserve in the manner in which it was created.

         To designate one or more committees, each committee to consist of one
or more of the directors of the corporation. The board may designate one or more
directors as alternate members of any committee, who may replace any absent or
disqualified member at any meeting of the committee. The by-laws may provide
that in the absence or disqualification of a member of a committee, the member
or members present at any meeting and not disqualified from voting, whether or
not such member or members constitute a quorum, may unanimously appoint another
member of the board of directors to act at the meeting in the place of any such
absent or disqualified member. Any such committee, to the extent provided in the
resolution of the board of directors, or in the by-laws of the corporation,
shall have and may exercise all the powers and authority of the board of
directors in the management of the business and affairs of the corporation, and
may authorize the seal of the corporation to be affixed to all papers which may
require it; but no such committee shall have the power or authority in reference
to the following matters: (i) approving or adopting, or recommending to the
stockholders, any action or matter expressly required by the Delaware General
Corporation Law to be submitted to stockholders for approval or (ii) adopting,
amending or repealing any by-law of the corporation.

         When and as authorized by the stockholders in accordance with law, to
sell, lease or exchange all or substantially all of the property and assets of
the corporation, including its good will and its corporate franchises, upon such
terms and conditions and for such consideration, which may consist in whole or
in part of money or property including shares of stock in, and/or other
securities of, any other corporation or corporations, as its board of directors
shall deem expedient and for the best interests of the corporation.

         8. Elections of directors need not be by written ballot unless the
by-laws of the corporation shall so provide.

         Meetings of stockholders may be held within or without the State of
Delaware, as the by-laws may provide. The books of the corporation may be kept
(subject to any provision contained in the statutes) outside the State of
Delaware at such place or places as may be designated from time to time by the
board of directors or in the by-laws of the corporation.

         Whenever a compromise or arrangement is proposed between this
corporation and its creditors or any class of them and/or between this
corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this corporation or of any creditor or stockholder thereof or on the
application of any receiver or receivers appointed for this corporation under
the provisions of Section 291 of Title 8 of the Delaware Code or on the
application of trustees in dissolution or of any receiver or


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receivers appointed for this corporation under the provisions of Section 279 of
Title 8 of the Delaware Code order a meeting of the creditors or class of
creditors, and/or of the stockholders or class of stockholders of this
corporation, as the case may be, to be summoned in such manner as the said court
directs. If a majority in number representing three-fourths in value of the
creditors or class of creditors, and/or of the stockholders or class of
stockholders of this corporation, as the case may be, agree to any compromise or
arrangement and to any reorganization of this corporation as a consequence of
such compromise or arrangement, the said compromise or arrangement and the said
reorganization shall, if sanctioned by the court to which the said application
has been made, be binding on all the creditors or class of creditors, and/or on
all the stockholders or class of stockholders, of this corporation, as the case
may be, and also on this corporation.

         9. The corporation reserves the right to amend, after, change or repeal
any provision contained in this Certificate of Incorporation, in the manner now
or hereafter prescribed by statute, and all rights conferred upon stockholders
herein are granted subject to this reservation.

         10. A director of the corporation shall not be personally liable to the
corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director except for liability (i) for any breach of the director's
duty of loyalty to the corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the Delaware General Corporation
Law, or (iv) for any transaction from which the director derived any improper
personal benefit.

         WE, THE UNDERSIGNED, being each of the incorporators hereinbefore
named, for the purpose of forming a corporation pursuant to the General
Corporation Law of the State of Delaware, do make this Certificate, hereby
declaring and certifying that this is our act and deed and the facts herein
stated are true, and accordingly have hereunto set our hands this Tenth day of
July, 1997.

                                                /s/ J. McBurnett
                                                ----------------------------
                                                J. McBurnett


                                                /s/ B. Cleveland
                                                ----------------------------
                                                B. Cleveland


                                                /s/ D. Singleton
                                                ----------------------------
                                                D. Singleton


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