Wholly aromatic polyester of isophthalic acid, terephthalic acid, p- hydroxybenzoic acid, hydroquinone and an arylene diol

摘要

Aromatic polyesters based on isophthalic acid, terephthalic acid, p- hydroxybenzoic acid, hydroquinone and an arylene diol are described. The five monomers ae used in well-specified proportions and yield polymers that display an excellent overall combination of mechanical and thermal properties. The subject copolyesters have melting points of at least about 260° C.; their heat distortion temperatures are at least about 200° C. they have fiber ratings of up to 3. The novel polymers can be melt-fabricated using standard injection molding, extrusion and melt-spinning techniques.