Flame retardant polycarbonate

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United States of America Patent

PATENT NO 9856406
SERIAL NO

14772178

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Abstract

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The present invention provides a thermoplastic molding composition comprising A) 60 to 99 percent by weight (pbw) aromatic poly(ester) carbonate having a weight-average molecular weight of at least 25,000, B) 1 to 20 parts per 100 parts resin (phr) graft (co)polymer having a core-shell morphology, comprising a grafted shell that contains polymerized alkyl(meth)acrylate and a composite rubber core that contains interpenetrated and inseparable polyorganosiloxane and poly(meth)alkyl acrylate where the weight ratio of polyorganosiloxane/poly(meth)alkylacrylate/grafted shell is 70-90/5-15/5-15, C) 2 to 20 phr phosphorus-containing compound, and D) 0.1 to 15 phr boron compound having average particle diameter of 2 to 10 microns.

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Patent Owner(s)

Patent OwnerAddress
COVESTRO LLC1 COVESTRO CIRCLE PITTSBURGH PA 15205

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Xiangyang Seven Fields, US 130 1479

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