Patent ID: 8034858
Filing Date: 2011-10-11
Classification: C08K,C08L

Abstract:
1. A polypropylene resin composition comprising: a propylene-ethylene block copolymer (A-1), a first random copolymer rubber (B-1), a second random copolymer rubber (B-2), an inorganic filler (C), and a fatty acid amide (D), wherein in the combined weight of the propylene-ethylene block copolymer (A-1), the first and second random copolymer rubbers (B-1), (B-2) and the inorganic filler (C), the proportion of the propylene-ethylene block copolymer (A-1) is from 45 to 85% by weight, the proportion of the first random copolymer rubber (B-1) is from 5 to 25% by weight, the proportion of the second random copolymer rubber (B-2) is from 5 to 25% by weight, the combined proportion of the first and second random copolymer rubbers (B-1), (B-2) is from 10 to 30% by weight, and the proportion of the inorganic filler (C) is from 5 to 25% by weight, and wherein the amount of the fatty acid amide (D) for 100 parts by weight of a combined weight of the propylene-ethylene block copolymer (A-1), the first and second random copolymer rubbers (B-1), (B-2) and the inorganic filler (C) is from 0.05 to 1 part by weight; wherein the first random copolymer rubber (B-1) is a random copolymer rubber composed of ethylene and α-olefin having 4-20 carbon atoms and the first random copolymer rubber (B-1) has a density of from 0.85 to 0.885 g/cm wherein the second random copolymer rubber (B-2) is a random copolymer rubber composed of ethylene and α-olefin having 4-20 carbon atoms and the second random copolymer rubber (B-2) has a density of from 0.85 to 0.885 g/cm