FIELD: chemistry.
SUBSTANCE: invention relates to copolyamide, method of its obtaining, copolyamide-containing composition, as well as to application of copolyamide and composition. Copolyamide contains, at least, two different links and corresponds to the following general formula: A/X.T. A is selected from the link, obtained from amino acid, link, obtained from lactam, and link, corresponding to formula (Ca-diamine).(Cb-diacid), Ca stands for the number of carbon atoms in diamine. Cb stands for the number of carbon atoms in diacid. Each of a and b is in the range from 4 to 36, preferably from 9 to 18. X.T stands for the link, obtained by polycondensation of linear aliphatic Cx-diamine and terephthalic acid. X stands for the number of carbon atoms and is in the range from 9 to 36, preferably from 10 to 18. Copolyamide has content of end amino groups larger or equal to 20 milli-equiv/g, content of acid end groups lower or equal to 100 milli-equiv/g, content of non-reactive end groups larger or equal to 20 milli-equiv/g. Method of copolyamide obtaining lies in carrying out polycondensation of the following copolymers: monomers, resulting in links A and X, terephthalic acid and, optionally, monomer, resulting in link Z, and, at least, one chain growth regulator. Composition contains, at least, one said copolyamide and, at least, one additive, selected from group, including filling agents, glass fibre, dyes, stabilisers, in particular UV-stabilisers, plasticisers, modifiers of shock viscosity, surface active substances, pigments, bleaches, antioxidants, natural waxes, polyolefins and their mixtures. Composition and copolyamide are applied in form of powder, granules, monolayer structure or, at least, one layer of multilayer structure. Composition and copolyamide are used as additive and/or filling agent in production of components or parts of electric and electronic equipment, automobile equipment, equipment for transportation and transfer of gas, oil and their compounds.
EFFECT: invention makes it possible to increase mechanical properties of copolyamides.
31 cl, 3 tbl, 7 ex
