POLYAMIDE RESIN COMPOSITION AND MOULDED PRODUCT Russian patent published in 2015 - IPC C08L77/06 C08L77/10 C08K5/18 C08K5/36 C08G69/26 

FIELD: chemistry.

SUBSTANCE: invention relates to a polyamide resin composition, intended for obtaining a moulded product. The polyamide resin composition contains: (A) a polyamide, containing a unit of dicarboxylic acid and a diamine unit, including not less than 30 wt % of an m-xylenediamine unit, (B) a compound based on an aromatic secondary amine and (C) a compound on an organosulphuric base, where the mixed amount of the compound of the organosulphuric base (C) constitutes from 0.2 to 5 wt.p. counted per 100 wt.p. of the polyamide, and the weight ratio (B)/(C) in the polyamide resin composition is in the range from 0.1 to 5.0. The composition is characterised by a coefficient of oxygen-permeability not higher than 1 cm³·mm/m²·day·atm, at 23°C and 75% relative humidity (RH). Also described is the moulded product such as a hose or a pipe.

EFFECT: improved resistance to thermal ageing with the simultaneous preservation of permeability characteristics.

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