PROCESS FOR ADVANCING EPOXY RESINS COMPRISING UP TO 1.0 (WT OF WATER

摘要

A process is disclosed for preparing an advanced epoxy resin by reacting a relatively low molecular weight polyepoxide with a phenolic compound; in the presence of a catalytic amount of an alkyl substituted phosphonium salt such as tri-t-butyl 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.