Flame retardant thermoplastic resin composition

Abstract

Flame retardant thermoplastic resin compositions containing (A) 10 to 40 parts by weight of a rubber-reinforced resin produced by graft-polymerizing a monomer component containing an aromatic vinyl compound and a vinyl cyanide compound as main ingredients in the presence of a rubber polymer comprising particles having a particle size of not more than 150 nm in an amount of 0 to 15% by weight, particles having a particle size of from more than 150 to less than 350 nm in an amount of 60 to 100% by weight and particles having a particle size of not less than 350 nm in an amount of 0 to 25% by weight; and (B) 90 to 60 parts by weight of an aromatic polycarbonate having a viscosity-average molecular weight of 16,000 to 30,000, with the proviso that the total amount of the components (A) and (B) is 100 parts by weight. The compositions also include (C) a phosphate compound represented by the general formula (I): 1 where R1, R2, R3 and R4 are independently phenyl group or xylenyl group; X is m-phenylene group or 2,2-bis(4′-phenylene)propane group; and n is 0.5 to 1.2, in an amount of 8 to 25 parts by weight based on 100 parts by weight of the sum of said components (A) and (B); and (D) a component containing 10 to 70% by weight of poly-tetrafluoroethylene (d1) and 90 to 30% by weight of a lubricant (d2), provided that the total amount of (d1) and (d2) is 100% by weight, in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the sum of components (A) and (B).

Dependencies are inferred from the claim text.