PNEUMATIC TIRE - YOKOHAMA RUBBER CO LTD

Title:

PNEUMATIC TIRE

Document Type and Number:

WIPO Patent Application WO/2018/211874

Kind Code:

A1

Abstract:

Provided is a pneumatic tire wherein road ability on poor-quality surfaces, abrasion resistance, cut/chip resistance, and degree of pyrogenicity are improved over the conventional level. This pneumatic tire is characterized by: comprising a tread rubber 7 with a shoulder groove depth d of 10 mm or more; the rubber composition constituting the tread rubber 7 being obtained by blending 60 to 70 parts by mass of carbon black having a nitrogen adsorption specific surface area of 70 to 130 m2/g, 0.5 parts by mass or more of sulfur, and a vulcanization accelerator per 100 parts by mass of a diene rubber comprising 50 to 70 mass% of styrene butadiene rubber, 20 to 30 mass% of butadiene rubber, and 10 to 30 mass% of natural rubber; the average glass transition temperature of the diene rubber being -65°C or less; the ratio Ma/Ms of vulcanization accelerator content parts by mass Ma to sulfur content parts by mass Ms being 1.0-1.3; and the rubber hardness at 20°C of the tread rubber 7 being 65-70.

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Inventors:

SUGIURA HIROKI (JP)

Application Number:

PCT/JP2018/015273

Publication Date:

November 22, 2018

Filing Date:

April 11, 2018

Export Citation:

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Assignee:

YOKOHAMA RUBBER CO LTD (JP)

International Classes:

B60C1/00; B60C11/01; B60C11/03; C08K3/04; C08K3/06; C08L7/00; C08L9/00; C08L9/06

Domestic Patent References:

WO2018003526A1	2018-01-04
WO2017164329A1	2017-09-28

Foreign References:

JPH01314605A	1989-12-19
JP2012007145A	2012-01-12
JP2013237724A	2013-11-28
JPH05117450A	1993-05-14
US20060266454A1	2006-11-30
JP2015206029A	2015-11-19
JP2017222315A	2017-12-21
EP3327080A1	2018-05-30
JPH05117450A	1993-05-14

Other References: