Patent ID: 7105604
Filing Date: 2006-09-12
Classification: C08F,C08L

Abstract:
1. A soft propylene-based resin composition, comprising block (I) and block (II), wherein: block (I) is a propylene-based polymer having propylene unit chain segments that bond in a mode of head-to-tail bonding, in which the chain segment has an isotactic block-containing stereoblock structure; and wherein block (I) satisfies the following condition (C): (C) a partial structure assigned to a pentad represented by rmrm exists in the head-to-tail-bonding propylene unit chain segments in the polymer, and its proportion is at most 7% relative to all pentads of the head-to-tail-bonding propylene unit chain segments of the polymer; and block (II) is a copolymer of at least propylene and ethylene.