RUBBER COMPOSITION FOR TIRES, TREAD RUBBER, AND TIRE

WIPO Patent Application WO/2022/249765

A1

Provided is a rubber composition that is for tires and that is capable of achieving, at a high-level, a balance between low fuel consumption performance and wet-grip performance of a tire.　The rubber composition for tires according to the present invention contains rubber components, a resin component, and a filler, and is characterized in that the rubber components include a diene-based rubber component A containing an isoprene backbone rubber and having a glass transition temperature of -50°C or less and include a diene-based rubber component B containing a butadiene backbone rubber and being uncompatible with the diene-based rubber component A, the total contained amount of styrene in the diene-based rubber component B is 15 mass% or less, the resin component has a weight average molecular weight (Mw) of 200-1600 g/mol, the contained amount of the resin component is 1-45 parts by mass with respect to 100 parts by mass of the rubber components, and 0°C tanδ/50°C tanδ of the composition is 2.7 or more.

KAWASHIMA MASAHIRO (JP)

PCT/JP2022/016937

December 01, 2022

March 31, 2022

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BRIDGESTONE CORP (JP)

B60C1/00; C08C19/25; C08K3/013; C08K3/04; C08L7/00; C08L9/00; C08L9/06; C08L15/00; C08L101/00

WO2019117168A1	2019-06-20
WO2015079703A1	2015-06-04
WO2003046020A1	2003-06-05

JP2017203111A	2017-11-16
JP2001288329A	2001-10-16
JP2019151743A	2019-09-12
JP2018100321A	2018-06-28
JP2019206652A	2019-12-05
JP2019038298A	2019-03-14
JP2022015909A	2022-01-21
JP2007217562A	2007-08-30

R.R. HAMPTON, ANALYTICAL CHEMISTRY, vol. 21, 1949, pages 923

SUGIMURA Kenji (JP)

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