Process for advancing epoxy resins comprising up to 1.0%wt of water
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0302560A2
公开(公告)日:1989-02-08
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.