TIRE RUBBER COMPOSITION AND TIRE - YOKOHAMA RUBBER CO LTD

Title:

TIRE RUBBER COMPOSITION AND TIRE

Document Type and Number:

WIPO Patent Application WO/2021/241746

Kind Code:

A1

Abstract:

The objective of the present invention is to provide a tire rubber composition with excellent crack growth resistance, groove crack resistance, wear resistance, and chipping resistance, and a tire using the same. The tire rubber composition according to the present invention is a conjugated diene rubber containing a rubber component, silica, and a silane coupling agent, in which in the rubber component, the content of specific conjugated diene rubber is 35% by mass or more, the content of natural rubber is 10% by mass or more, and the specific conjugated diene rubber comprises a block A containing isoprene units, a block B containing 1,3-butadiene units, and a siloxane compound modified structure at the end, wherein at least one of A or B contains units of a vinyl compound containing an amino group, the Mw of A is from 1,000 to 30,000, the overall Mw is from 50,000 to 5,000,000, the overall aromatic vinyl content is from 30% to 45% by mass, and the overall vinyl bond content is from 15% to 35% by mass.

Inventors:

SATO MASAKI (JP)
SAWA HIDEAKI (JP)
ITO KEISUKE (JP)
IZUNO KAKERU (JP)

Application Number:

PCT/JP2021/020495

Publication Date:

December 02, 2021

Filing Date:

May 28, 2021

Export Citation:

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Assignee:

YOKOHAMA RUBBER CO LTD (JP)

International Classes:

B60C1/00; C08C19/25; C08F297/04; C08K3/32; C08K3/36; C08K5/541; C08L7/00; C08L15/00; C08L53/02; C08L101/12

Domestic Patent References:

WO2013099325A1	2013-07-04
WO2013099324A1	2013-07-04
WO2019073828A1	2019-04-18
WO2019073828A1	2019-04-18

Foreign References:

JP2019199533A	2019-11-21
JP2019048921A	2019-03-28
JP2013108042A	2013-06-06
JP2016037543A	2016-03-22
JP2016003280A	2016-01-12
JP2021054260A	2021-04-08
US5708092A	1998-01-13
GB2241239A	1991-08-28
US5527753A	1996-06-18

Other References: