Epoxy resin(s) with anhydride and polybutadiene-maleic anhydride

Details Epoxy resin(s) with anhydride and polybutadiene-maleic anhydride Epoxy resin(s) with anhydride and polybutadiene-maleic anhydride

1994-09-27

1999-10-05

Sellers, Robert E.

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

Synthetic resins

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

525117, C08L 5104, C08L 6300

Patent

active

059625864

ABSTRACT:
Improved toughened epoxy resin systems having glass transition temperatures of 250.degree. C. to 350.degree. C. are prepared by carefully curing a blend of epoxy resin or resins, all of which have an epoxy functionality of at least 2 with the mixture having an epoxy functionality greater than 2, an anhydride hardener mixture comprising a bicycloalkenedicarboxylic acid anhydride, a polybutadiene-maleic anhydride adduct, and optionally, a polybutadiene, a bismaleimide, or benzophenone tetracarboxylic acid dianhydride, preferably using a dialkyl imidazole-2-thione accelerator.

REFERENCES:
patent: 4028432 (1977-06-01), Dawans et al.
patent: 4601944 (1986-07-01), Zussman
patent: 4900848 (1990-02-01), Saito et al.
patent: 5091498 (1992-02-01), Arduengo, III et al.
patent: 5324767 (1994-06-01), Koyama et al.

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