| 摘要 |
PURPOSE: To obtain a crystalline copolyamide which is tough and excellent in dimensional stability by producing a copolyamide consisting of hexamethyleneadipamide units,ω-carboxamide units and hexamethyleneterephthalamide units at a specified molar ratio. CONSTITUTION: This copolyamide consists of hexamethyleneadipamide units (A),ω-carboxamide units (B) of the formula (wherein n is 10 or 11) and hexamethyleneterephthalamide units (C), wherein the proportions of these units are adjusted so as to provide a composition represented by any point within the circumference defined by the points (60,3,37), (60,8,32), (45,25,32), (20,25,55), (20,10,70) and (27,3,70) on a triangular diagram (A,B,C) showing the proportions (mol%) to thereby produce a crystalline copolyamide. The obtained resin gives a molding having high deflection temperature under load and high rigidity and excellent in tensile elongation, impact strength, etc.
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