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Patent Searching and Data


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.

Inventors:
UENO YOSHIKAZU (JP)
KODA DAISUKE (JP)
Application Number:
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:
WO2019044893A12019-03-07
Foreign References:
US3966691A1976-06-29
JPH09132609A1997-05-20
JPH06239909A1994-08-30
JP2005200598A2005-07-28
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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