Patent ID: 8729189
Filing Date: 2014-05-20
Classification: C08F,C08L

Abstract:
1. A propylene-based block copolymer comprising 5 to 80% by weight of a room temperature n-decane-soluble portion (Dsol) and 20 to 95% by weight of a room temperature n-decane-insoluble portion (Dinsol), with the proviso that the total amount of the Dsol and the Dinsol is 100% by weight, and satisfying the following requirements [1] to [3] at the same time: [1] the molecular weight distribution (Mw/Mn) of the Dsol is not less than 7.0 but not more than 30, [2] the molecular weight distribution (Mw/Mn) of the Dinsol is not less than 7.0 but not more than 30, and Mz/Mw thereof is not less than 6.0 but not more than 20, and [3] the pentad fraction (mmmm) of the Dinsol is not less than 93%, wherein the room temperature n-decane-soluble portion (Dsol) contains, as a main component, a copolymer rubber comprising propylene and one or more olefins selected from ethylene and α-olefins of 4 to 20 carbon atoms, and the room temperature n-decane-insoluble portion (Dinsol) contains, as a main component, a crystalline propylene-based (co)polymer comprising 98.5 to 100% by mol of propylene and 0 to 1.5% by mol of one or more olefins selected from ethylene and α-olefins of 4 to 20 carbon atoms.