Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-01-09
1993-08-17
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528171, 528172, 528173, 528183, 528188, 528206, 528207, 528208, 528337, 528352, 528353, C08G 7300
Patent
active
052370453
ABSTRACT:
Polymerization or cure of di-phthalonitrile monomers or prepolymers by a curing agent selected from (a) an acid and an amine, (b) a salt of an acid and an amine, and (c) mixtures of (a) and (b). In a preferred embodiment, the curing agents are amine salts which are reaction products of an aromatic amine and an aromatic sulfonic acid. The use of the novel curing agents enhances curing rates and results in polymers which have high Tg.
REFERENCES:
patent: 4408035 (1983-10-01), Keller
patent: 4410676 (1983-10-01), Keller
U.S. patent application entitled "Curing Phthalonitriles With Acid" of T. ller, Ser. No. 07-818,672, filed Jan. 9, 1992.
Burchill Peter J.
Keller Teddy M.
Anderson Harold D.
Kap George A.
McDonnell Thomas E.
The United States of America as represented by the Secretary of
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