Patent ID: 7732530
Filing Date: 2010-06-08
Classification: C08F,C08L

Abstract:
1. A propylene copolymer composition comprising: A) a propylene copolymer containing from 1 to 20% by weight of olefins other than propylene; and B) at least one propylene copolymer containing from 10 to 30% by weight of olefins other than propylene, where the propylene copolymer A and the propylene copolymer B are present as separate phases and a portion of n-hexane soluble material is ≦2.6% by weight, the propylene copolymer composition comprising a tensile E modulus ranging from 150 MPa to 800 MPa, and the propylene copolymer composition is obtained from a polymerization process comprising at least two successive polymerization steps, wherein a catalyst system comprising a metallocene compound is used in each successive polymerization step; wherein the metallocene compound is of formula VIII: wherein: M is zirconium, hafnium or titanium; X are identical or different and are each, independently of one another, hydrogen or halogen or an —R, —OR, —OSO L is a radical selected from the group consisting of —SiMe R R R R R R where R R