Aromatic polyester compounds and process for preparing them

摘要

Polymers having improved tenacity and heat resistant properties are prepared by heating a mixture of a 4-acetoxybenzoic acid derivative, a hydroquinone diacetate derivative, a dicarboxylic acid, and a 4-acetoxy-(4-acetoxyphenyl)benzoate derivative in two steps to remove generated acetic acid and form the polymer, which is useful for making fibers, films and molded products.