Polypropylene-based resin composition and automobile parts using the same

摘要

The present invention provides a polypropylene-based resin composition, which comprises of a) a polypropylene; b) an ethylene 1-octene copolymer in which r1r2<1 (herein, r1=k11/k12, r2=k22/k21, k11 is a growth reaction rate constant when ethylene is added to a growth chain in which an end active site is ethylene, k12 is a growth reaction rate constant when octene is added to a growth chain in which an end active site is ethylene, k22 is a growth reaction rate constant when octene is added to a growth chain in which an end active site is octene, and k21 is a growth reaction rate constant when ethylene is added to a growth chain in which an end active site is octene); and c) an inorganic filling agent, and a part for vehicles manufactured by using the same.

主权项

1. A polypropylene-based resin composition, comprising:
a) 65 to 75 wt % of a polypropylene; b) 10 to 40 wt % of an ethylene 1-octene copolymer in which r1r2<1, wherein r1=k11/k12, r2=k22/k21, k11 is a growth reaction rate constant when ethylene is added to a growth chain in which an end active site is ethylene, k12 is a growth reaction rate constant when octene is added to a growth chain in which an end active site is ethylene, k22 is a growth reaction rate constant when octene is added to a growth chain in which an end active site is octene, and k21 is a growth reaction rate constant when ethylene is added to a growth chain in which an end active site is octene; and c) 7 to 12 wt % of an inorganic filler, wherein the polypropylene-based resin composition has a density of 0.865 to 0.870 g/cm3.