Patent ID: 7067075

Claim:
A flame-retardant thermoplastic resin composition, which comprises: 100 parts by weight of a thermoplastic resin (A), 0.1 to 30 parts by weight of a polyorganosiloxane-containing graft copolymer (B) obtained by polymerizing, in at least one stage, monomer(s) (B-3) and a vinyl monomer (B-4) in the presence of polyorganosiloxane particles (B-1), wherein monomer(s) (B-3) comprises a polyfunctional monomer (B-2) containing at least two polymerizable unsaturated bonds within the molecule thereof, 0.0005 to 5 parts by weight of at least one metal salt (C) selected from the group consisting of alkali metal salts and bivalent or further polyvalent metal salts, and 0.05 to 2 parts by weight of a fluororesin (D), wherein the polyorganosiloxane-containing graft copolymer (B) is produced by polymerizing, in at least one stage, 1.5 to 10 parts by weight, per 100 parts by weight of the whole copolymer, of monomer(s) (B-3) comprising 100 to 20% by weight of a polyfunctional monomer (B-2) containing at least two polymerizable unsaturated bonds within the molecule thereof and 0 to 80% by weight of another copolymerizable monomer (B-5) in the presence of 40 to 95 parts by weight of polyorganosiloxane particles (B-1) and further polymerizing, in at least one stage, 5 to 50 parts by weight of a vinyl monomer (B-4).