Patent ID: 8748004

Claim:
A copolyamide comprising at least two different units, said copolyamide corresponding to the following formula: A/X.T A is a unit obtained from an amino acid, a unit obtained from a lactam or a unit corresponding to the formula (C a diamine).(C b diacid), with a representing the number of carbon atoms of the diamine and b representing the number of carbon atoms of the diacid, a and b each being between 4 and 36, X.T denotes a unit obtained from the polycondensation of a C x aliphatic and linear diamine and of terephthalic acid, with x representing the number of carbon atoms of the C x diamine, x being between 10 and 36, said copolyamide exhibiting: a content of amine chain ends between 25 and 100 μeq/g, a content of acid chain ends between 15 and 80 μeq/g, and a content of unreactive chain ends between 35 and 200 μeq/g.