EXHIBIT 2.2

                               SECOND AMENDMENT TO
                               PURCHASE AGREEMENT

      This Second Amendment to Purchase Agreement (this "Second Amendment") is
made and entered into this 30th day of September 2003 by and between
Aerojet-General Corporation, an Ohio corporation ("Purchaser"), and Atlantic
Research Corporation, a Delaware corporation ("Seller").

                                    RECITALS

      A.    Seller and Purchaser entered into that certain Purchase Agreement
            dated as of May 2, 2003 and that certain First Amendment to Purchase
            Agreement dated August 29, 2003 (collectively, the "Purchase
            Agreement").

      B.    Pursuant to Section 10.14 of the Purchase Agreement, Seller and
            Purchaser have agreed to amend the Purchase Agreement as set forth
            herein.

                             STATEMENT OF AGREEMENT

      NOW, THEREFORE, in consideration of the foregoing recitals and of the
mutual covenants and agreements hereinafter set forth, and intending to be
legally bound, the parties hereto hereby agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

      1.01 CERTAIN DEFINITIONS. Unless otherwise defined herein, all capitalized
terms used herein have the meanings given to them in the Purchase Agreement.

                                   ARTICLE II

                      AMENDMENTS TO THE PURCHASE AGREEMENT

      2.01  SECTION 3.02(z). Section 3.02(z) of the Purchase Agreement is hereby
            amended and superseded in all respects by the provisions of this
            Second Amendment. As amended and restated, Section 3.02(z) reads in
            its entirety:

            "NO KNOWLEDGE OF PURCHASER'S DEFAULT. As of the date of this
            Agreement and as of September 30, 2003, Seller has no Knowledge that
            any of Purchaser's representations and warranties contained in this
            Agreement or in the Other Agreements are untrue, inaccurate or
            incomplete or that Purchaser is in default under any term or
            provision of this Agreement."

      2.02  SECTION 3.04(j). Section 3.04(j) of the Purchase Agreement is hereby
            amended and superseded in all respects by the provisions of this
            Second Amendment. As amended and restated, Section 3.04(j) reads in
            its entirety:


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            "NO KNOWLEDGE OF SELLER'S DEFAULT. As of the date of this Agreement
            and as of September 30, 2003, Purchaser has no Knowledge that any of
            Seller's representations and warranties contained in this Agreement
            or in the Other Agreements are untrue, inaccurate or incomplete or
            that Seller is in default under any term or provision of this
            Agreement."

      2.03  SECTION 5.02. Section 5.02 of the Purchase Agreement is hereby
            amended by adding clause (g). Section 5.02(g) reads in its entirety:

            "FINANCIAL ASSURANCES. Purchaser and Seller shall have entered into
            an agreement satisfactory to Purchaser and Seller in their
            respective sole discretions with respect to the provision of
            financial assurances by Purchaser to replace certain hazardous waste
            - Closure/Post Closure insurance policies of Seller pertaining to
            Camden, Arkansas and Orange, Virginia."

      2.04  SECTION 6.02. The first sentence of Section 6.02 of the Purchase
            Agreement is hereby amended and superseded in all respects by the
            provisions of this Second Amendment. As amended and restated, the
            first sentence of Section 6.02 reads in its entirety:

            "Unless extended by the Parties by mutual agreement, the Closing
            will occur and be effective as of 11:59 p.m. (Eastern Daylight Time)
            on the date that is five (5) Business Days following satisfaction of
            all of the conditions referred to in Section 5.01 and Section 5.02
            (the "Closing Date"), but in no event whatsoever later than October
            21, 2003 (the "Drop Dead Date")."

      2.05  To Seller's knowledge, Purchaser is in compliance with the terms and
            covenants of the Purchase Agreement required to be performed prior
            to the date hereof. To Purchaser's knowledge, Seller is in
            compliance with the terms and covenants of the Purchase Agreement
            required to be performed prior to the date hereof.

      2.06  Purchaser accepts the Supplemental Disclosure Package attached
            hereto as EXHIBIT A.

      2.07  Purchaser confirms that none of the written disclosures that have
            been delivered by Seller, Sequa or both to Purchaser subsequent to
            August 29, 2003 and through September 30, 2003, all as attached
            hereto as EXHIBIT B, disclosed facts, conditions or events
            constituting a "material adverse change" for purposes of the
            Purchase Agreement, including Section 5.01(f) thereof.

      2.08  Seller and Purchaser confirm to each other that the Closing was not
            consummated on or prior to September 30, 2003 through no fault of
            either of the Parties or because of any breach of any provision of
            the Purchase Agreement by either of the Parties.


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                                   ARTICLE III

                                  MISCELLANEOUS

      3.01  EFFECT OF SECOND AMENDMENT. On and after the date hereof, each
            reference in the Purchase Agreement to "this Agreement,"
            "hereunder," "hereof," "herein" or words of like import referring to
            the Purchase Agreement, and each reference in the Other Agreements
            to the "Purchase Agreement," "thereunder," "thereof" or words of
            like import referring to the Purchase Agreement, shall mean and be a
            reference to the Purchase Agreement as amended by this Second
            Amendment.

            This Second Amendment constitutes the entire agreement among the
            parties pertaining to the subject matter hereof and supersedes all
            prior and contemporaneous agreements, understandings,
            representations or other arrangements, whether express or implied,
            written or oral, of the parties in connection therewith except to
            the extent expressly incorporated or specifically referred to
            herein. In the event of a conflict between the respective provisions
            of the Purchase Agreement and this Second Amendment, the terms of
            this Second Amendment shall control.

            Except as specifically amended by the terms of this Second
            Amendment, the terms and conditions of the Purchase Agreement are
            and shall remain in full force and effect for all purposes.

      3.02  COUNTERPARTS. Two original counterparts of this Second Amendment are
            being executed by the parties hereto, and each fully executed
            counterpart shall be deemed an original without production of the
            others and will constitute one and the same instrument.

      3.03  GOVERNING LAW. This Second Amendment will be governed by and
            construed and interpreted in accordance with the internal
            substantive laws of the State of New York, applicable to contracts
            made and to be performed wholly within such state, and without
            regard to the conflicts of law principles thereof.

                         [SIGNATURES ON FOLLOWING PAGE]


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      IN WITNESS WHEREOF, each of the parties hereto has caused this Second
Amendment to be executed by its duly authorized officers, as of the date first
above written.

AEROJET-GENERAL CORPORATION

By: /s/ Brian E. Sweeney
    --------------------------------
Name: Brian E. Sweeney
Title: VP Legal & Contracts


ATLANTIC RESEARCH CORPORATION

By: /s/ Patrick J. Jenkins
    --------------------------------
Name: Patrick J. Jenkins
Title: VP - Chief Financial Officer