Process for preparing epoxy resins having improved physical prop

Details Process for preparing epoxy resins having improved physical prop Process for preparing epoxy resins having improved physical prop

1983-06-30

1989-06-13

Nielsen, Earl A.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525523, 528104, C08G 5962

Patent

active

RE0329517

ABSTRACT:
Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.

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Allowed Application Ser. No. 79,282, filed Jul. 27, 1979, Davis (Now U.S. Pat. No. 4,251,594).
Allowed Application Ser. No. 63,894, filed Aug. 3, 1979, Doorakian.

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