Epoxy resins having improved physical properties when cured

Details Epoxy resins having improved physical properties when cured Epoxy resins having improved physical properties when cured

1981-12-14

1983-01-25

Nielsen, Earl A.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525523, 525533, 528 89, 528102, 528112, 528117, 528123, 428414, 428415, C08G 5962, C08G 5968, C08G 5950

Patent

active

043704654

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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