Dianhydrides of bis-(orthodicarboxyphenyloxyphenyl)acetylene and bis- (ortho-dicarboxyphenyloxyphenyl)2,2-dichloroethylene

摘要

The invention is concerned with dianhydrides derived from either tolane or 1,1-bis(p-hydroxyphenyl)2,2-dichloroethylene. These dianhydrides can be reacted with organic diamines to form polyetherimides useful in the molding art.