Patent ID: 6777476
Filing Date: 2004-08-17
Classification: C08L,Y10T

Abstract:
A polypropylene resin composition that contains:(A) 1-30 parts by wt of atactic polypropylene comprising propylene monopolymer or bipolymer of propylene and 1-20 wt % of C2-10 &agr;-olefin and having a Pentad isotactic index lower than about 30 and a weight-average molecular weight of between about 20,000 to about 200,000 g/mol; (B) 10-20 parts by wt of crystalline polypropylene comprising propylene monopolymer or bipolymer of propylene and 1-25 wt % of C2-10 &agr;-olefin and having a melt index of from about 0.5 to about 10 g/10 min at 230C and a weight-average molecular weight greater than 150,000 g/mol; (C) 30-70 parts by wt of ethylene-&agr;-olefin copolymer rubber comprising a bipolymer of ethylene and 25-60 wt % of C2-10 &agr;-olefin; (D) 1-30 parts by wt of process oil, having 10-800 cSt (40C) of kinematic viscosity, wherein said process oil is selected from a group consisting of paraffinic oil, aromatic oil and naphthenic oil; and (E) 1-20 parts by wt of inorganic filler, wherein said inorganic filler is selected from a group consisting of talc, calcium carbonate, calcium sulfate, magnesium oxide, calcium stearate, mica, silica, calcium silicate, clay and carbon black.