FIRE-PROOF POLYCARBONATE COMPOSITIONS WITH MODIFIED SHOCK RESISTANCE Russian patent published in 2012 - IPC C08L69/00 C08L51/04 C08K3/34 C08K3/38 C08K5/523 B29C51/02 

FIELD: chemistry

SUBSTANCE: the invention relates to fire-proof polycarbonate compositions with modified shock resistance, used to manufacture moulded products. The composition contains, in mass parts: A) 40-95 branched aromatic polyester-carbonate; B) 1-25 graft polymer; C) 9-18 agilite; D) 0,4-20 oligophosphate based on diphenol A as a phosphorus-containing anti-pyrene; E) 1-6 of one or several boron-containing inorganic compositions selected from Zn₄B₂O₇·H₂0, Zn₂B₆O₁₁·3,5H₂0 and/or ZnB₄O₇·4H₂0 and F) 0-3 polytetrafluorethylene used to prevent drop formation. The composition does not contain thermoplastic vinyl (co)polymers and poly alkylene terephthalates G.2. The thermoformable products are made by melting and mixing the components of the composition. The resulting molten mass is cooled and granulated. The granulate is melted and sheets are extruded from the molten mass. Then the three-dimensional shape is formed by means of deep draw with the temperature of 150-220° C.

EFFECT: production of compositions with excellent fire-proof properties and high heat resistance, which correspond to the fire safety regulations in accordance with ASTM E162 and ASTM E662.

6 cl, 1 tbl, 6 ex