Patent ID: 7544745

Claim:
A thermoplastic composition comprising in combination a polycarbonate component; an impact modifier composition, the components comprising a) a bulk polymerized ABS; b) an impact modifier different from the ABS; and a flame retardant, wherein b) comprises an elastomeric phase comprising a butadiene rubber, an ethylene-propylene-diene monomer rubber, an elastomeric copolymer of a C 1-8 alkyl (meth)acrylate with butadiene, or a combination comprising at least one of the foregoing elastomers, together with a rigid copolymer phase derived from the copolymerization of a monomer of formula (9): wherein each X c is independently hydrogen, C 1 -C 12 alkyl, C 3 -C 12 cycloalkyl, C 6 -C 12 aryl, C 7 -C 12 aralkyl, C 7 -C 12 alkaryl, C 1 -C 12 alkoxy, C 3 -C 12 cycloalkoxy, C 6 -C 12 aryloxy, chloro, bromo, or hydroxy, and R is hydrogen, C 1 -C 5 alkyl, bromo, or chloro, with a monomer of the generic formula (10): wherein R is hydrogen, C 1 -C 5 alkyl, bromo, or chloro, and X c is cyano, C 1 -C 12 alkoxycarbonyl, C 1 -C 12 aryloxycarbonyl, or hydroxycarbonyl, wherein the composition is capable of achieving a UL94 rating of V0 at a thickness of 1.5 mm, and wherein the composition has a notched Izod Impact of greater than about 300 J/m, determined at 23° C. using a one-eighth inch (3.2 mm) thick bar per ASTM D256.