Crystalline polyamide composition from dicarboxylic acid mixture and diamine
 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. 
Amoco Corporation
B B C C C
B32B B32B C08K C08K C08G
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Joel A. Larry W. David P. Yu-Tsai Wassily
Richardson Autry Sinclair Chen Poppe