Inventors:
George A. Doorakian - Bedford MA
Marsha A. Paul - Natick MA
Adolphus V. Gist - Dallas TX
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C08G 5968
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 trifluoroacetate 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.