Epoxy fusion catalyst and process

Details Epoxy fusion catalyst and process Epoxy fusion catalyst and process

1987-07-31

1989-05-09

Nielsen, Earl

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528365, 528374, 25218227, C08G 5968, C08G 5906

Patent

active

048291412

ABSTRACT:
A process is disclosed for preparing an advanced epoxy resin by reacting a relatively low molecular weight polyepoxide with a phenol, thiophenol, carboxylic acid or carboxylic acid anhydride in the presence of a catalytic amount of an alkyl substituted phosphonium salt such as tributyl phosphonium bromide. The process can be carried out under reaction conditions, such as the presence of water, which are deleterious to certain epoxy advancement catalysts.

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