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US 4,395,574 AGranted
Phosphonium phenoxide catalysts for promoting reaction of epoxides with phenols and/or carboxylic acids
AssigneeThe Dow Chemical Company
InventorsGeorge A. Doorakian, James L. Bertram
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Abstract
Certain tetrahydrocarbyl phosphonium phenoxide salts are described herein which are novel compounds and/or novel catalysts for promoting the reaction between vicinal epoxides and phenols and/or carboxylic acids or anhydrides. These catalysts are particularly useful in preparing high molecular weight epoxy resins by the advancement reaction of diglycidyl ether of bisphenol A with bisphenol A.
Claims11
A compound represented by the formula ##STR11## or a complex of the compound represented by Formula I with one or more equivalents of a phenol, H.sub.m X, wherein
- (1) R.sub.1 -R.sub.4 each independently is a hydrocarbyl or inertly-substituted hydrocarbyl;
- (2) X is a phenoxide anion, said anion being a conjugate base of a polyhydric phenol bearing from 2 to 6 nuclear hydroxyl groups and having from about 12 to about 30 carbon atoms;
- and
- (3) m is the valence of the anion X.
1 more element
Dependencies are inferred from the claim text.