PNEUMATIC TIRE - BRIDGESTONE CORP

Title:

PNEUMATIC TIRE

Document Type and Number:

WIPO Patent Application WO/2017/043008

Kind Code:

A1

Abstract:

The present invention provides a pneumatic tire that can substantially improve wet performance. The pneumatic tire is provided with a tread rubber that includes a tread-surface rubber layer that is located at the outermost surface of a tread and with a tread-interior rubber layer that is located to the inside of the tread-surface rubber layer in the radial direction of the tire. The pneumatic tire is characterized in that the 100% modulus of the tread-surface rubber layer is larger than the 100% modulus of the tread-interior rubber layer and in that the tread-surface rubber layer is formed from a rubber composition that includes: a rubber component (A) that contains 50 mass% or more of a diene rubber; and, per 100 parts by mass of the rubber component (A), 5-50 parts by mass of at least one type of additive component (B) selected from among thermoplastic resins, oils, and aromatic vinyl compound-conjugated diene compound copolymers that have a weight average molecular weight, in terms of polystyrene, of 5,000-200,000 as measured by gel permeation chromatography.

Inventors:

KUWAYAMA ISAO (JP)
SAKURAI HIDEYUKI (JP)

Application Number:

PCT/JP2016/003508

Publication Date:

March 16, 2017

Filing Date:

July 28, 2016

Export Citation:

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Assignee:

BRIDGESTONE CORP (JP)

International Classes:

B60C1/00; B60C11/00; B60C11/03; B60C11/12; C08L9/00; C08L25/10; C08L91/00

Domestic Patent References:

WO2008016145A1	2008-02-07
WO2013065319A1	2013-05-10

Foreign References:

JP2009166712A	2009-07-30
JP2009173048A	2009-08-06
JP2015514040A	2015-05-18
JP2008018912A	2008-01-31
JP2006224770A	2006-08-31

Other References: