PURPOSE: To obtain a thermoplastic composition excellent in flame retardancy, resistance to shock and heat and moldability by formulating a fluororesin, a silicone and a specific a phosphoric ester to a composition of an aromatic polycarbonate and a specific copolymer.
CONSTITUTION: A pre-composition of this resin pre-composition comprises (A) an aromatic polycarbonate, (B) a graft copolymer prepared by grafting 70-20 pts.wt. of a monomer mixture of (i) 40-90wt.% of an aromatic vlinyl monomer with (ii) 10-60wt.% of a vinyl cyanide monomer to 30-80 pts.wt. of a rubber polymer and/or (C) a vinyl copolymer prepared by copolymerization of a monomer mixture of 40-90wt.% of ingredient (i) with 10-60wt.% of ingredient (ii) wherein the amount of the ingredient (A) is adjusted to 50-98wt.%, while the total of ingredients (B) and (C) is to 50-2wt.%. Further, (D) 0.01-5 pts.wt. of a fluororesin and/or silicone and (E) 1-40 pts.wt. of a phosphoric ester of the formula (X is a difunctional aromatic group; R1-R4 are each phenyl which may be substituted) are formulated to 100 pts.wt. of the resin pre-composition to give this composition.
TAMURA SHINICHI
CHIBA KAZUMASA
