POLYAMIDE RESIN Russian patent published in 2015 - IPC C08G69/26 C08L77/06 

FIELD: chemistry.

SUBSTANCE: invention relates to polyamide resin, method of its obtaining, to composition based on polyamide resin, as well as to moulded product. Polyamide resin includes units of diamine, containing 90 mol % or more paraxylenediamine and units of dicarboxylic acid, containing 90 mol % or more units of sebacic acid and/or units of azelaic acid. Polyamide resin has concentration of phosphorus atoms from 50 to 1000 ppm and YI value 10 or lower in colour difference test in accordance with JIS-K-7105. Method of obtaining polyamide resin includes stage of polycondensation in melt of diamine component, containing 90 mol % or more of paraxylenediamine and component based on dicarboxylic acid, containing 90 mol % or more sebacic acid and/or azelaic acid, in presence of compound, containing phosphorus atoms. Composition, used for obtaining moulded product, includes 100 wt. p. of said polyamide resin and from 0.01 to 2 wt. p. of nucleating agent.

EFFECT: invention makes it possible to obtain polyamide resin, possessing good heat resistance, water absorption resistance, chemical stability, high physical and mechanical properties, and at the same time forms little amount of gel, is characterised by good colour tone and mouldability.

14 cl, 6 tbl, 22 ex