Patent ID: 7531605
Filing Date: 2009-05-12
Classification: C08F,C08L

Abstract:
1. A process for producing a polyolefin-based resin composition which comprises: in a first polymerization stage, polymerizing or copolymerizing at least one monomer selected from the group consisting of ethylene, propylene, an α-olefin comprising 4 to 20 carbon atoms, a styrene and a cyclic olefin, in the presence of a catalyst comprising a combination of a catalyst component (A) comprising at least one compound selected from compounds of transition metals of Group 4 of the Periodic Table comprising a cyclopentadienyl skeleton structure and a promoter component (B), thereby obtaining a homopolymer or copolymer; and in a second polymerization stage, copolymerizing the homopolymer or the copolymer obtained in the first polymerization stage with at least one monomer selected from the group consisting of propylene, an α-olefin comprising 4 to 20 carbon atoms, a styrene and a cyclic olefin, in a presence of a polyene having at least two polymerizable double bonds in one molecule, wherein the polyene is at least one compound selected from the group consisting of a polyene of a styrene-compound, a styrene/α-olefin polyene which comprises a residue group of styrene and a residue group of an α-olefin in the same molecule, a compound of formula (VI) wherein n is 0, 1, or 2, a compound of formula (VII) wherein n is 0, 1, or 2, and m is an integer of from 1 to 11, and a compound of formula (VIII) wherein n is an integer of from 0 to 6; the polyene being used in an amount of 1.0×10 wherein the composition produced by the process satisfies the following requirements (a) to (c);