PROCESS FOR PRODUCING POLYPROPYLENE RESIN COMPOSITION

摘要

PCT No. PCT/JP84/00403 Sec. 371 Date Mar. 29, 1985 Sec. 102(e) Date Mar. 29, 1985 PCT Filed Aug. 17, 1984.Disclosed herein is a preparation process for polypropylene-base resin compositions, which process comprises heating at a temperature of 170 DEG -280 DEG C. a mixture containing a crystalline ethylenepropylene block copolymer having a specific composition, an ethylene-propylene copolymer rubber having a specific composition and viscosity, an inorganic filler having a specific particle size, and an organic peroxide, all in specified amounts. The thus-obtained polypropylene-base resin compositions are suitable for use in the production of large moldings such as automobile bumpers, fenders and body sidemembers because of their excellent low-temperature impact resistance, high molding fluidity, good paintability and high stiffness as well as their low preparation cost.