Hydroxyl terminated polyfunctional epoxy curing agents

Details Hydroxyl terminated polyfunctional epoxy curing agents Hydroxyl terminated polyfunctional epoxy curing agents

1984-07-05

1985-07-02

Bleutge, John C.

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

Synthetic resins

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

525524, 528 94, 528 98, 528 99, 528103, C08G 5914, C08L 6302

Patent

active

045269408

ABSTRACT:
A polyglycidyl derivative of an aromatic diamine, aminophenol, or polyphenol and a diglycidyl ether of a bisphenol are reacted with a bisphenol, in the presence of a catalyst at elevated temperature, to yield a reaction product wherein each glycidyl group is effectively endcapped with a moiety containing a free hydroxyl group. The ratio of equivalents of polyglycidyl compound to diglycidyl compound is 1 to 4 to 1 to 1, and of bisphenol to total glycidyl compounds is 1.8 to 1 to 2.4 to 1. Said product is useful for curing solid epoxy resins. The epoxy resins cured by said product have a dense crosslinked network resulting in concomitant superior coating properties especially chemical resistance while maintaining good flexibility.

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patent: 3931109 (1976-01-01), Martin
patent: 4288565 (1981-09-01), Lohse et al.
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