Patent ID: 7022766
Filing Date: 2006-04-04
Classification: C08F,C08L,C10M

Abstract:
1. An olefin block copolymer having a Mw/Mn (Mw: weight average molecular weight, Mn: number average molecular weight) of not more than 1.5, which copolymer comprises. (i) a polymer block comprising ethylene and an α-olefin of 3 to 20 carbon atoms, having a molar ratio (ethylene/α-olefin) of ethylene units to α-olefin units of from 20/80 to 65/35, a weight average molecular weight of 50,000 to 2,000,000, and having a slope of an intramolecular composition distribution of absolute value of 0.1 to 0, and (ii) a polymer block comprising ethylene and an α-olefin of 3 to 20 carbon atoms, having a molar ratio (ethylene/α-olefin) of ethylene units to α-olefin units of from 70/30 to 85/15, a weight average molecular weight of 10,000 to 400,000, and having a slope of an intramolecular composition distribution of absolute value of 0.1 to 0.