Crystallizable copolyamide having terephthalamide and naphthalamide units
 Polyphthalamides having a useful combination of thermal and mechanical properties and excellent solvent resistance, particularly to alcohols, comprise recurring aliphatic terephthalamide and 2,6-naphthalene dicarboxylamide units and, optionally, isophthalamide units. 
Amoco Corporation
C
C08G
inventional
Yu-Tsai
Chen