Adducts of diaminodiphenyl sulfone compounds as hardeners for ep

Details Adducts of diaminodiphenyl sulfone compounds as hardeners for ep Adducts of diaminodiphenyl sulfone compounds as hardeners for ep

1993-08-19

1994-07-19

Krass, Frederick

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525504, 525526, 525533, 528 99, 528103, 528109, 528361, 528391, 564325, C08G 5918, C08G 5924, C08G 5950

Patent

active

053310683

ABSTRACT:
The present invention relates to a hardener for polyfunctional epoxy resins comprising the adduct obtained from the reaction of (1) a diaminodiphenyl sulfone of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently hydrogen, C.sub.1 -C.sub.4 alkyl or halogen and (2) a cycloaliphatic diepoxide at a ratio of aminohydrogen equivalent of said sulfone to said epoxy equivalent of said diepoxide from 2.5:1 to 75:1.

REFERENCES:
patent: 4330644 (1982-05-01), Allen
patent: 4330659 (1982-05-01), King et al.
patent: 4500582 (1985-02-01), King et al.
patent: 4568727 (1986-02-01), Herzog et al.
"Epoxy Resin Technology", Paul F. Bruins, Copy-right 1968, John Wiley and Sons, Inc. p. 22.

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