| abstract |
PURPOSE: To provide a compsn. contg. an arom. polycarbonate wherein the chain is stopped with a specified end cap agent, a specified core/sheath copolymer as an impact resistance improving agent and a flame-retardant salt and with excellent impact resistance, flame retardancy and melt stability. n CONSTITUTION: A compsn. contg. an arom. polycarbonate (A) with an intrinsic viscosity of 0.35-0.41 dl/s (in methylene chloride at 25°C) and end-capped with a chain stopping agent (e.g. p-cumylphenol) which can give superior extensibility to tert-butylphenol, a core/sheath copolymer (B) which has 50-90 wt.% (hereinbelow abbreviated as %) core with a Tg of at most -10°C and consisting of a conjugated diene (butadiene is suitable) and a sheath contg. respectively 5-25% alkyl alkacrylate (methy methacrylate is suitable) and styrenic substance grafted thereon and is at most 12%, pref., 3% to A and a flame-retardant salt (C) is provided. n COPYRIGHT: (C)1990,JPO |