Patent ID: 7498370

Claim:
A flame retardant thermoplastic resin composition comprising: (A) 45 to 95 parts by weight of a thermoplastic polycarbonate resin; (B) 1 to 50 parts by weight of a vinyl graft copolymer prepared by graft-polymerizing (B-1) 5 to 95 parts by weight of a monomer mixture of (B-1.1) 50 to 95 by weight of at least one of styrene, α-methylstyrene, halogen- or alkyl-substituted styrene, C 1-8 methacrylic acid alkyl ester, or C 1-8 acrylic acid alkyl ester and (B-1.2) 5 to 50 parts by weight of at least one of acrylonitrile, methacylonitrile, C 1-8 methacrylic acid alkyl ester, C 1-8 acrylic acid alkyl ester, maleic acid anhydride, or C 1-4 alkyl- or phenyl N-substituted maleimide onto (B-2) 5 to 95 parts by weight of a rubber polymer selected from the group consisting of butadiene rubber, acryl rubber, ethylene-propylene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, isoprene rubber, copolymer of ethylene-propylene-diene (EPDM), polyorganosiloxane-polyalkyl (meth)acrylate rubber complex and a mixture thereof; (C) 0 to 50 parts by weight of a vinyl copolymer or a mixture of vinyl copolymer prepared from (C-1) 50 to 95 parts by weight of at least one of styrene, α-methyl styrene, halogen or alkyl substituted styrene, C 1-8 methacrylic acid alkyl ester or C 1-8 acrylic acid alkyl ester and (C-2) 5 to 50 parts by weight of at least one of acrylonitrile, methacrylonitrile, C 1-8 methacrylic acid alkyl ester, C 1-8 acrylic acid alkyl ester, maleic acid anhydride, or C 1-4 alkyl or phenyl N-substituted maleimide; (D) 1 to 30 parts by weight of a mixture of organic phosphorous compounds (D-1) 5 to 95 parts by weight of a monomeric phosphoric acid ester compound represented by the following Formula (I) or a mixture thereof and (D-2) 95 to 5 parts by weight of an oligomeric phosphoric acid ester compound represented by the following Formula (II) or a mixture thereof, per 100 parts by weight of the sum of (A), (B) and (C): wherein R 1 and R 2 are independently hydrogen or a C 1-5 alkyl group and x is 0 or an integer from 1 to 3, wherein R 3 , R 4 , R 5 and R 6 are independently a C 6-20 aryl group or an alkyl-substituted C 6-20 aryl group, respectively, and n is an integer representing the number of repeating units from 1 to 5, the average value of n in the mixture of oligomeric phosphoric acid ester is 1 to 3; and (E) 0.05 to 5.0 parts by weight of a fluorinated polyolefin resin with average particle size of 0.05 to 1,000 μm and density of 1.2 to 2.3 g/cm 3 , per 100 parts by weight of (A)+(B)+(C).