Patent ID: 7511088

Claim:
A flame retardant thermoplastic resin composition comprising: (A) 45 to 95 parts by weight of a polycarbonate resin; (B) 1 to 50 parts by weight of a rubber modified vinyl-grafted copolymer prepared by graft-polymerizing (b 1 ) 5 to 95% by weight of a monomer mixture of 50 to 95% by weight of at least one of styrene, Î±-methylstyrene, halogen- or alkyl-substituted styrene, C 1-8 methacrylic acid alkyl ester, C 1-8 acrylic acid alkyl ester, or a mixture thereof and 5 to 50% by weight 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% 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 (meta)acrylate rubber complex and a mixture thereof; (C) 0 to 50 parts by weight of a vinyl copolymer prepared from (c 1 ) 40 to 95% by weight of at least one of styrene, Î±-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 60% 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) 1Ëœ30 parts by weight of a mixture of organic phosphorous compounds (d 1 ) 1Ëœ50% by weight of a cyclic oligomeric phosphazene compound represented by the following Formula (II) and (d 2 ) 99Ëœ50% by weight of an oligomeric phosphoric acid ester compound represented by the following Formula (IV), per 100 parts by weight of the sum of (A), (B) and (C): and wherein R 1 is alkyl, aryl, alkyl substituted aryl, aralkyl, alkoxy, aryloxy, amino, or hydroxyl or alkoxy substituted with alkyl, aryl, amino, or hydroxy group or aryloxy substituted with alkyl, aryl, amino, or hydroxy group; k and m are an integer from 0 to 10; R 2 is C 6-30 dioxyaryl or alkyl substituted C 6-30 dioxyaryl derivative; and l is a degree of polymerization and the average value of l is from 0.3 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 from 1 to 5 representing the number of repeating units and the average value of n in the oligomeric phosphoric acid ester is 1 to 3; (E) 0.05 to 5.0 parts by weight of a fluorinated polyolefin resin per 100 parts by weight of(A)+(B)+(C).