COPOLYMER RUBBER AND METHOD FOR PRODUCING SAME, AND CROSSLINKED RUBBER COMPOSITION

Title:

COPOLYMER RUBBER AND METHOD FOR PRODUCING SAME, AND CROSSLINKED RUBBER COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2018/084128

Kind Code:

A1

Abstract:

Provided are: a copolymer rubber which has all of processability, strength and homogeneity and is suitable as a modifier for resins or the like; and a crosslinked rubber composition having excellent mechanical strength, wear resistance and the like. A copolymer rubber produced by copolymerizing a raw material comprising a polyfunctional vinyl aromatic copolymer (A), a conjugated diene compound (B) and an aromatic vinyl compound (C), wherein the polyfunctional vinyl aromatic copolymer (A) contains structural units (a) each derived from a divinyl aromatic compound, structural units (b) each derived from a monovinyl aromatic compound and structural units (d) each constituting a terminal, the structural units (a) are contained in an amount of 2 mol% or more and less than 95 mol%, at least some of the structural units (a) are vinyl-group-containing structural units (a1) and at least some of the remaining structural units are structural units each constituting the structural unit (d), and the number average molecular weight of the copolymer rubber is 300 to 100000.

Inventors:

KURATOMI TADASHI (JP)
KAWABE MASANAO (JP)

Application Number:

PCT/JP2017/039254

Publication Date:

May 11, 2018

Filing Date:

October 31, 2017

Export Citation:

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Assignee:

NIPPON STEEL & SUMIKIN CHEM CO (JP)

International Classes:

C08F257/02; C08K3/04; C08L9/00; C08L51/00

Domestic Patent References:

WO2016104748A1	2016-06-30
WO2002000779A1	2002-01-03

Foreign References:

JP2010511071A	2010-04-08
JP2004123873A	2004-04-22
JP2013100433A	2013-05-23
JP2009544824A	2009-12-17
JP2003073434A	2003-03-12
JP2004517202A	2004-06-10
JP2005213381A	2005-08-11
JP2004123873A	2004-04-22

Other References: