PROPYLENE BLOCK COPOLYMER AND PROPYLENE RESIN COMPOSITION

摘要

A propylene block copolymer which comprises the following block (a) and block (b) and has a melt flow rate of 0.1 to 200 g/10 min: block (a): a polymer block which is a propylene homopolymer or a random copolymer of propylene and up to 10 mol % comonomer selected from the group consisting of ethylene and C4-20 alpha -olefins; block (b): a polymer block which is a random copolymer of propylene and 10 to 80 mol % comonomer selected from the group consisting of ethylene and C4-20 alpha -olefins, and which satisfies the following relationship (I): nb