WHOLLY AROMATIC POLYESTERS OF ISOPHTHALIC ACID, TEREPHTHALIC ACID, P-HYDROXYBENZOIC ACID, HYDROQUINONE AND 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 are used in well-specifiedproportions and yield polymers that display an excellent overall combination of mechanical andthermal properties. The subject copolyesters have melting points of at least about 260° C; theirheat distortion temperatures are at least about 200° C. They have fiber ratings of up to 3. Thenovel polymers can be melt-fabricated using standard injection molding, extrusion and melt-spinning techniques.