POLYAMIDE POLYMER COMPOSITIONS Russian patent published in 2015 - IPC C08L77/06 C08G69/26 C08K5/29 C08J5/00 C08J5/18 

FIELD: chemistry.

SUBSTANCE: composition includes a polyamide polymer (A), containing diamine structural links and dicarboxylic acid structural links, where 70 mol % or more of the diamine structural links are formed from xylylene diamine, and 50 mol % or more of the dicarboxylic acid structural links are formed from sebacic acid, and 1-40 pts.wt of at least one copolyamide (B) per 100 pts.wt of a polyamide polymer (A), where the copolyamide (B) is selected from copolyamide 6/66/12, copolyamide 6/66/11 and a polyether and polyamide copolymer containing a polyamide 12 link or a polyamide 11 link or a polyether link. Polyamide (A) is obtained via polycondensation of a diamine component containing 80 mol % or more of xylylene diamine with a dicarboxylic acid component containing 80 mol % or more of sebacid acid, and has number-average molecular weight of 6000-50000. Also described is a moulded article made from a polyamide composition, which is a film, a sheet or a tube.

EFFECT: high modulus of elasticity of the polyamide polymer material, gas impermeability, low water absorption and flexibility.

10 cl, 3 tbl, 13 ex