Patent ID: 6271310
Filing Date: 2001-08-07
Classification: C08L

Abstract:
A polypropylene composition comprising 0.01-5 parts by weight of an olefin (co)polymer (a), 100 parts by weight of a propylene homopolymer (b), and 28-300 parts by weight of an ethylene-propylene copolymer (c), wherein the product, ([.eta.].sub.RC /[.eta.].sub.PP).times.(W.sub.PP /W.sub.RC), of the ratio of the intrinsic viscosity of the ethylene-propylene copolymer (c) to that of the propylene homopolymer (b) represented by [.eta.].sub.RC /[.eta.].sub.PP and the ratio of the weight of propylene homopolymer (b) to that of the ethylene-propylene copolymer (c) represented by W.sub.PP /W.sub.RC falls within the range of 0.2-3.0;the olefin (co)polymer (a) having an intrinsic viscosity as measured in tetralin at 135.degree. C. and represented by [.eta.].sub.E of 15-100 dl/g;the propylene homopolymer (b) having an intrinsic viscosity as measured in tetralin at 135.degree. C. and represented by [.eta.].sub.PP of 0.2-15 dl/g; andthe ethylene-propylene copolymer (c) having an intrinsic viscosity as measured in tetralin at 135.degree. C. and represented by [.eta.].sub.RC of 0.2-10 dl/g.