Patent ID: 6423782
Filing Date: 2002-07-23
Classification: C08L

Abstract:
A propylene-based copolymer comprising from 50 to 90% by weight of a propylene-ethylene copolymer [A] that satisfies the following (1) to (3), and from 10 to 50% by weight of a propylene-ethylene copolymer [B] having an ethylene content of from 10 to 25% by weight:(1) Its ethylene content (&agr;) measured in 13C-NMR falls between 0.2 and 10% by weight; (2) The amount of its fraction (Wp) eluted within the temperature range between (Tpâˆ’5)Â° C. and (Tp+5)Â° C. is at least 20% by weight, with Tp (Â°C.) being the peak temperature for essential elution in temperature-programmed fractionation chromatography of the copolymer; and (3) The amount of its fraction (W0) eluted within the temperature range not higher than 0Â° C. in temperature-programmed fractionation chromatography of the copolymer, and &agr; satisfy a relation of W0&lE;(3+2&agr;)/4.