Tough epoxy polymers formable by reaction injection molding

Details Tough epoxy polymers formable by reaction injection molding Tough epoxy polymers formable by reaction injection molding

1983-06-20

1985-02-05

Nielsen, Earl A.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525407, 528110, C08G 5942, C08G 5962, C08J 500

Patent

active

044979452

ABSTRACT:
A tough epoxy polymer is formed by pre-reacting a poly(oxypropylene) diol or triol with a chemical excess of an anhydride curing agent for epoxy resins. The resulting diester-diacid is then polymerized with an epichlorohydrin-bisphenol A epoxy resin. Suitable imidizole catalysts are preferred for the reactions.

REFERENCES:
patent: 3431237 (1969-03-01), Harry
patent: 3849383 (1974-11-01), Fetscher et al.
patent: 4052349 (1977-10-01), Turley et al.
Noshay et al., "Epoxy/Modifier Block Copolymers", J. Polymer Science, Poly. Chem. Ed. 12, 689-705, (1974).

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