Thermosettable, polymerizable resin composition comprising a pol

Details Thermosettable, polymerizable resin composition comprising a pol Thermosettable, polymerizable resin composition comprising a pol

1977-05-16

1978-12-12

Welsh, M. J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

252182, 260 775R, 528 53, 528 67, 528 73, C08L 6300

Patent

active

041295544

ABSTRACT:
A thermosettable, polymerizable resin composition comprising a polyepoxide and a polyisocyanate which is normally catalyzed by a basic curing catalyst for forming oxazolidone rings and isocyanurate rings or uredione rings is remarkably stabilized at low temperatures by incorporating a small amount of an organic electron acceptor, such as, picric acid, quinone, chloranil, or cyanoacetate ester into the composition. Since the specific electron acceptors effectively inhibit the polymerization of the reactive components in the composition at low temperatures, a shelf life of the composition is remarkably prolonged.

REFERENCES:
patent: 3020262 (1962-02-01), Speranza
patent: 3494888 (1970-02-01), McElroy
patent: 4022721 (1977-05-01), Ashida

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