DIENE RUBBER AND RUBBER COMPOSITION

Title:

DIENE RUBBER AND RUBBER COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2020/235619

Kind Code:

A1

Abstract:

The present invention provides: a diene rubber which enables the achievement of a rubber composition or a crosslinked product, which has a good balance between ice grip performance and wet grip performance at high levels; a rubber composition which contains this diene rubber; a tire member which is formed of this rubber composition or a crosslinked product of this rubber composition; and a tire which at least partially uses this rubber composition or a crosslinked product of this rubber composition. The present invention also provides a resin modifying agent which is composed of a diene rubber and enables the achievement of a resin composition that has the above-described characteristics.　A diene rubber (A) which contains a butadiene unit having a weight average molecular weight of 5,000-50,000, wherein if β12 mol% is the percentage by mole of a 1, 2-linked butadiene unit and βcp mol% is the percentage by mole of a specific structural unit, respectively relative to all butadiene units contained in the diene rubber (A), the following (i)-(iii) are satisfied: (i) βcp > 0; (ii) β12 > 40; and (iii) βcp/(β12 – 40) ≤ 2.

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Inventors:

UENO YOSHIKAZU (JP)
KODA DAISUKE (JP)

Application Number:

PCT/JP2020/020051

Publication Date:

November 26, 2020

Filing Date:

May 21, 2020

Export Citation:

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Assignee:

KURARAY CO (JP)

International Classes:

B60C1/00; C08F36/06; C08K3/013; C08L9/00; C08L21/00

Domestic Patent References:

WO2019044893A1

2019-03-07

Foreign References:

US3966691A	1976-06-29
JPH09132609A	1997-05-20
JPH06239909A	1994-08-30
JP2005200598A	2005-07-28
JP2013139522A	2013-07-18
JP2002060549A	2002-02-26
JP2006515897A	2006-06-08
JP2011132298A	2011-07-07

Other References: