Patent ID: 7196126

Claim:
A thermoplastic flame retardant resin composition comprising: (A) about 40 to 95 parts by weight of a styrenic resin selected from the group consisting of styrenic resin consisting of styrenic monomeric units without rubber, rubber modified styrenic resin wherein the styrenic portion consists of styrenic monomeric units and a mixture thereof, wherein said rubber modified styrenic resin is produced by polymerizing 80 to 99.5 parts by weight of one or more monomer(s) selected from the group consisting of styrene, N-substituted styrene, and α-alkyl styrene to 0.5 to 20 parts by weight of a rubber selected from the group consisting of butadiene, isoprene, copolymer of butadiene and styrene, and alkyl acrylate; (B) about 5 to 60 parts by weight of a polyphenylene ether; (C) about 0.1 to 40 parts by weight of a rubber modified styrenic graft copolymer resin based on 100 parts by weight of the sum of (A) and (B) wherein said rubber modified graft copolymer resin is comprised of about 40 to 65% by weight of a rubber and 60 to 35% by weight of a styrenic copolymer resin which contains about 0.1 to 8% by weight of acrylonitrile or methacrylonitrile and about 92 to 99.9% styrenic monomer excluding rubber; and (D) about 5 to 30 parts by weight of a phosphorous-containing compound flame retardant wherein the phosphorous-containing compound flame retardant in the thermoplastic flame retardant resin composition consists of an aromatic phosphoric acid ester compound based on 100 parts by weight of the sum of (A) and (B).