POLICARBONATE MOULDING COMPOSITIONS Russian patent published in 2012 - IPC C08K5/09 C08L67/02 

FIELD: machine building industry.

SUBSTANCE: thermoplastic composition contains, in wt. parts: A) from 10 to 90 of aromatic polycarbonate; B) from 10 to 90 of, at least, one composition selected from a group consisting of: modified rubber of graft copolymer (B.1) or pre-compound or mixture from (B.1) with (co)polymer (B.2) free from rubber of, at least, one of monomer, selected from a group consisting of vinyl aromatic compositions, vinyl cyanides, alkyl ether (met)acryl acid with 1-8 carbon atoms in alkyls, unsaturated carboxylic acids and anhydrides and imides of unsaturated carboxylic acids; C) from 0.005 to 0.15 in terms of 100 weight parts of a combination of A and B components, of at least one aliphatic and/or carboxylic acid and D) at least, one additive. In addition, C component is either added to the melt containing A and B components, or pre-mixed up with B component at 180-260°C. This mixture is then mixed up with A component at compounding stage or B and C components mixture in a melted condition is mixed up with A component melt at 220-300°C, and all components are then dispersed.

EFFECT: invention ensures production of modified shock-resistant polycarbonate compositions, which are specific by their improved resistance to hydrolysis and light shade of raw product suitable for production of complicated molded items production.

16 cl, 2 tbl, 7 ex