Crystalline copolyamide from terephthalic acid, isophthalic acid

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524607, 528338, 528339, 528340, 528347, 528349, C08G 6926, C08L 7706

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046173420

ABSTRACT:
A crystalline polyamide which has improved tensile strength and which has a heat deflection temperature in excess of 240.degree. C. when filled is formed from dicarboxylic acid compounds comprising compounds of terephthalic acid and isophthalic acid in a molar ratio of at least 80:20 to about 99:1 and diamines comprising hexamethylene diamine and trimethylhexamethylene diamine in a molar ratio of about 98:2 to about 60:40.

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patent: 3926924 (1975-12-01), Edgar et al.
patent: 3941755 (1976-03-01), Chapman et al.
patent: 4022756 (1977-05-01), Chapman et al.
patent: 4113708 (1978-09-01), Chapman et al.
patent: 4238603 (1980-12-01), Chapman et al.

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