Crystalline polyamide composition from dicarboxylic acid mixture

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, 525432, 528339, 528340, 528347, 528349, C08L 7706

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RE0344478

ABSTRACT:
Novel crystalline polyamides having high heat deflection temperatures when filled are prepared from aliphatic diamines and either mixtures of terephthalic acid and adipic acid or mixtures of terephthalic acid, isophthalic acid and adipic acid. The mole ratio of aliphatic diamine to terephthalic acid, isophthalic acid, and adipic acid is in the range of about 100:65-95:25-0:35-5. The polyamides can be filled with about 10 to about 60 parts by weight of a filler. The mechanical properties of these polyamides are largely unaffected by absorbed water.

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patent: 4603166 (1986-07-01), Poppe et al.
Journal of Polymer Science (JPS), vol. 42; pp. 249-257; 1960.
A. J. Yu, et al. "Isomorphous Replacement in Copolyamide Systems: Adipic and Terephthalic Acids" Journal Polymer Science v. 42 (1960) pp. 249-257.
D. Erickson "Plastic for the '90s Some Clever chemistry churns out a new polymer" Scientific American Nov., 1991, pp. 130-131.

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