Method for producing olefin block polymer using plurality of types of transition metal catalysts

Patent metadata

Field	Value
Publication number	US-9695260-B2
Application number	US-201414291303-A
Country	US
Kind code	B2
Filing date	May 30, 2014
Priority date	Dec 2, 2011
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A method for producing an olefin block polymer, the method includes: polymerizing olefin using a polymerization catalyst (X), a polymerization catalyst (Y), and an organometallic compound (C) having an atom of any of Groups 2, 12, and 13 of the periodic table of the elements, the organometallic compound (C) excluding an activating co-catalyst agent (B), wherein: the polymerization catalyst (X) is formed by bringing a transition metal compound (A-X) represented by a general formula (1-X) into contact with an activating co-catalyst agent (B); and the polymerization catalyst (Y) is formed by bringing a transition metal compound (A-Y) represented by a general formula (1-Y) into contact with the activating co-catalyst agent (B).

[Chem. 2]

(ML a X b E c ) n   (1-Y)

First claim

The invention claimed is:

1. An ethylene/propylene block copolymer composition satisfying all of the following conditions (1) to (5):
(1) to have one or more melting points having 130° C. or more;
(2) to have 2.0 or more wt % of H EP BHIS content;
(3) to have 80.0 mol % or more but 94.5 mol % or less of H C 2 ′ BHIS ;
(4) to have 0.1 mol % or more but 9.0 mol % or less of L C 2 ′ BHIS ; and
(5) to have 5.0 mol % or less of an absolute value of a difference between the H C 2 ′ BHIS and the H C 2 ′ BHS ;
wherein H EP BHIS represents a high-ethylene-content ethylene/propylene copolymer content in the boiling hexane insoluble component; wherein H C 2 ′ BHIS represents an ethylene content in the high-ethylene-content ethylene/propylene copolymer component in the boiling hexane insoluble component; wherein L C 2 ′ BHIS represents an ethylene content in the low-ethylene-content ethylene/propylene copolymer component in the boiling hexane insoluble component; and wherein H C 2 ′ BHS represents an ethylene content in the high-ethylene-content ethylene/propylene copolymer component in the boiling hexane soluble component.

2. The ethylene/propylene block copolymer composition as set forth in claim 1 satisfying the following condition (6):
(6) to satisfy 12000≦Young's modulus (MPa)×tensile impact (kJ/m2).

3. The ethylene/propylene block copolymer composition as set forth in claim 2 satisfying the following condition (7):
(7) to have 18% or less of haze value.

Assignees

• Sumitomo Chemical Co

Inventors

• Ishiwata Koji
• Takaoki Kazuo
• Ito Kazuyuki

Classifications

• C08F2410/04

  Dual catalyst, i.e. use of two different catalysts, where none of the catalysts is a metallocene · CPC title

• C08F297/083

  the monomers being ethylene or propylene · CPC title

• C08F210/06 Primary

  Propene · CPC title

• C08F293/00

  Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule (on to polymers modified by introduction of unsaturated end groups C08F290/02) · CPC title

• C08L23/08

  Copolymers of ethene (C08L23/16 takes precedence) · CPC title