Patent ID: 7169837
Filing Date: 2007-01-30
Classification: C08K

Abstract:
1. A flame retardant resin composition comprising: (A) 100 parts by weight of a resin component (component a) which comprises a high impact polystryrene, said polystyrene having a reduced viscosity η (B) 1 to 50 parts by weight of a phosphorus-containing compound (component b-2) represented by the following formula (I-2-a):  wherein the resin composition can achieve retention of a heat distortion temperature under load (M) represented by the following expression of at least 95% wherein x represents a heat distortion temperature under load (° C.) of an article molded from the resin component (component a) and y represents a heat distortion temperature under load (° C.) of an article molded from a resin composition comprising the resin component (component a) and the phosphorus-containing compound (component b-2), said heat distortion temperature under load measured by a method according to ASTM-D648 by use of a ¼-inch test piece under a load of 1.81 MPa (18.5 Kgf/cm 2 ), and the resin composition can achieve at least a flame retardancy level V-2 in a UL 94 Standard.