TIRE - SUMITOMO RUBBER IND

Title:

TIRE

Document Type and Number:

WIPO Patent Application WO/2021/246128

Kind Code:

A1

Abstract:

Provided is a tire including a tread section and at least one outermost member other than the tread section. A rubber composition that composes the tread section and a rubber composition that composes the at least one outermost member other than the tread section each include a rubber component containing a diene rubber and a multi-component polymer. The multi-component polymer has an aromatic vinyl unit, a non-conjugated olefin unit, and a conjugated diene unit. For each rubber component that constitutes the rubber component of the tread section, the value obtained by multiplying the aromatic-vinyl-unit content (mass%) by the mass fraction in the rubber component is calculated, and these obtained values are summed to calculate the aromatic-vinyl-unit content TArm (mass%) in the rubber component of the tread section. Meanwhile, the aromatic-vinyl-unit content OMMArm (mass%) in the rubber component of the at least one outermost member other than the tread section is similarly calculated. At this time, TArm is greater than OMMArm. The tire is a tire in which crack resistance has been improved.

Inventors:

IKAI TAKUMA (JP)

Application Number:

PCT/JP2021/018250

Publication Date:

December 09, 2021

Filing Date:

May 13, 2021

Export Citation:

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Assignee:

SUMITOMO RUBBER IND (JP)

International Classes:

B60C1/00; C08K3/36; C08L7/00; C08L9/06

Domestic Patent References:

WO2008038462A1	2008-04-03
WO2018092733A1	2018-05-24

Foreign References:

JP2017145342A	2017-08-24
JP2018083884A	2018-05-31
JPH0598102A	1993-04-20
JP2016074808A	2016-05-12
JP2015013924A	2015-01-22
JP2019073579A	2019-05-16
JP2019014796A	2019-01-31
JP2018083884A	2018-05-31

Other References: