Polypropylene resin composition for exterior parts of automobile

摘要

A polypropylene resin composition having a high moldability and capable of forming therefrom shaped articles having excellent surface hardness, thermal deformation resistance and low temperature impact resistance includes (A) 35 - 74 wt% of a crystalline ethylene-propylene block copolymer with an ethylene content of 0.5 - 15 wt%, an isotactic pentad fractional propylene of 96% or more and a MFR of 40 - 80 g/10 min. (230 DEG C, 2160g); (B) 21 - 40 wt% of an ethylene- alpha -olefin copolymer produced by using a single site catalyst and having an alpha -olefin content of 70 mol% or more, a ratio (Mw/Mn) of 2.5 or less, and a ratio (MI10/MI2.16) of 6 to 15; and (C) 5 - 25 wt% of a talc particle component having an average particle size of 3 - 7 mu m.