FIELD: chemistry.
SUBSTANCE: copolyamide includes units resulting from a reaction of polycondensation of the following precursors: terephthalic acid (a), aliphatic diamine (b), including x carbon atoms, where x represents an integer number between 6 and 22, and aminocarboxylic acid and/or lactam (c). Aminocarboxylic acid and/or lactam includes a basic chain and, at least, one linear or branched alkyl branching, with the total number of carbon atoms being equal to a value between 12 and 36. The method of the copolyamide obtaining consists in the fact that polycondensation of the precursors (a), (b), (c) is carried out. The composition includes, at least, one copolyamide.
EFFECT: invention makes it possible to obtain the copolyamide with high melting temperature and good flexibility, increase the copolyamide plasticity and impact strength.
30 cl, 3 tbl
