| 摘要 |
PURPOSE: A resin composition is provided, which is improved in the low temperature impact resistance, the hardness and the flowability by optimizing the dispersibility and particle size of rubber, and can be applied to the bumper cover of a car. CONSTITUTION: The resin composition comprises 70-95 wt% of an ethylene-propylene copolymer resin; 5-20 wt% of a thermoplastic elastic rubber; and 0-10 wt% of an inorganic filler. The ethylene-propylene copolymer resin contains ethylene by the amount of 15-25 % and has a melting index of 10-30 g/10 min(230 deg.C, 2.16 kgf). Preferably the thermoplastic elastic rubber is at least one selected from the group consisting of an ethylene-propylene rubber containing 70-80 % of ethylene, an ethylene-propylene-diene rubber containing 70-80 % of ethylene and an ethylene-octene rubber containing 23-27 % of octene. The inorganic filler is preferably talc with a mean particle size of 1-10 micrometers. |
