Patent ID: 6518363
Filing Date: 2003-02-11
Classification: C08F,C08L

Abstract:
A polypropylene resin composition comprising:95 to 80% by weight of a polypropylene resin (A) selected from the group consisting of a propylene-ethylene block copolymer (i) having a propylene homopolymer portion and propylene-ethylene random copolymer portion, and a mixture (ii) of the propylene-ethylene block copolymer (i) and a propylene homopolymer, wherein an intrinsic viscosity [&eegr;]AP of the propylene homopolymer portion when the resin (A) is the copolymer (i), or of the mixture of the propylene homopolymer portion and the propylene homopolymer when the resin (A) is the mixture (ii), is not more than 1.3 dl/g, and an intrinsic viscosity [&eegr;]AEP of the propylene-ethylene random copolymer portion is not more than 3.0 dl/g,; and 5 to 20% by weight of a propylene-ethylene block copolymer (B) composed of a propylene homopolymer portion and propylene-ethylene random copolymer portion wherein an intrinsic viscosity [&eegr;]BEP of the propylene-ethylene random copolymer is 8.0 to 15 dl/g, and wherein the polypropylene resin composition has a melt flow rate (MFR) of from 5.0 to 150 g/10 min., and the sum of the (A) and (B) is 100% by weight.