POLYESTER POLYMERS OF 3-HYDROXY-4'-(4-HYDROXYPHENYL) BENZOPHENONE OR 3,4'-DIHYDROXYBENZOPHENONE AND DICARBOXYLIC ACIDS

摘要

Aromatic polyesters derived from at least 10% glycols of the structure or are disclosed. The polyesters have an inherent viscosity of at least 0.5 as measured from a 0.5 g solution in 100 ml of an equal volume mixture of p-chlorophenol and 1,2-dichloroethane, and a heat of fusion of less than 1.5 joule per gram.