ORGANOPOLYSILOXANE-CONTAINING GRAFT COPOLYMER COMPOSITION

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A flame-retardant resin composition is disclosed which contains neither halogen nor phosphorus or reduced amounts of halogen and phosphorus, and has both excellent flame retardancy and impact resistance. An organopolysiloxane-containing graft copolymer composition comprises 100 parts by weight of an organopolysiloxane-containing graft copolymer (A) and 0.02 to 3.5 parts by weight of an alkali metal salt of sulfur-containing organic compound (B), the organopolysiloxane-containing graft copolymer (A) having a content of halogen atoms of 1, 000 ppm or less, and a content of alkaline-earth metal atoms of 3, 000 ppm or less. Alternatively, an organopolysiloxane-containing graft copolymer composition has a content of halogen atoms of 1, 000 ppm or less, and a content of alkaline-earth metal atoms of 3, 000 ppm or less.