QuickLinks -- Click here to rapidly navigate through this document

Exhibit 10.2.2

AMENDMENT TO ENVIRONMENTAL AGREEMENT

        THIS AMENDMENT TO ENVIRONMENTAL AGREEMENT is made as of this 15th day of
March, 1995, by and between ALLIANT TECHSYSTEMS INC. ("Alliant"), a Delaware
corporation, and HERCULES INCORPORATED ("Hercules"), a Delaware corporation
(collectively, the "Parties").

        WHEREAS, the Parties entered into an Environmental Agreement dated
October 28, 1994 (the "Environmental Agreement");

        WHEREAS, the Parties have agreed that Alliant shall be entitled to renew
the one-year lease pertaining to the Kenvil Facility for two additional one-year
terms and the one-year lease pertaining to the Clearwater Facility for three
additional one-year terms; and

        WHEREAS, the Parties now wish to modify the text of the Environmental
Agreement in certain limited respects to reflect the Parties' agreement with
respect to the renewal of the Kenvil Facility and Clearwater Facility leases;

        NOW, THEREFORE, in consideration of the premises and the mutual
covenants herein, in the Environmental Agreement, and in the Purchase and Sale
Agreement between the Parties, the Parties agree as follows:

        1.     The first sentence of § 8.4(b) of the Environmental Agreement is
hereby modified by deleting the following: ", but with respect to the Kenvil
Facility only to the extent any such Release occurs before the third (3rd)
anniversary of the Closing Date".

        2.     Section 12.1 of the Environmental Agreement is hereby modified as
follows:

(a)in the third sentence of § 12.1, the word "five" is deleted and the word
"two" is substituted in its place; and

(b)the fourth sentence of § 12.1 is deleted in its entirety.

        3.     The second sentence of § 12.2(b) is hereby modified by deleting
the following: ", as such obligation shall be modified by any agreement of the
Parties described in Section 12.1 of this Environmental Agreement,".

        4.     As amended by this Amendment to Environmental Agreement, the
Environmental Agreement shall remain in full force and effect.

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

        IN WITNESS WHEREOF. Hercules and Alliant, each by its duly authorized
representative, have executed this Amendment to Environmental Agreement on the
dates inserted below.

Attest:   ALLIANT TECHSYSTEMS INC.
 
 
 
  /s/

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

  By: /s/  DARYL L. ZIMMER      

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

    Name: Daryl L. Zimmer

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

Corporate Seal   Title: Vice President & General Counsel

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

    Date: May 15,1995

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

 
 
 
  Attest:   HERCULES INCORPORATED
 
 
 
  /s/  ISRAEL J. FLOYD      

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

  By: /s/  R. KEITH ELLIOTT      

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

    Name: R. Keith Elliott

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

Corporate Seal   Title: Executive VP & Chief Financial Officer

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

    Date: March 15, 1995

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

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

QuickLinks

Exhibit 10.2.2

AMENDMENT TO ENVIRONMENTAL AGREEMENT