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Title:
RUBBER COMPOSITION FOR TIRE, TREAD RUBBER, AND TIRE
Document Type and Number:
WIPO Patent Application WO/2022/249767
Kind Code:
A1
Abstract:
A rubber composition for tires is provided with which it is possible to improve the wet grip performance of tires. The rubber composition for tires comprises a diene-based rubber component A, a diene-based rubber component B, and a resin component C, and is characterized in that the difference in SP value between the diene-based rubber component A and the diene-based rubber component B is 0.25 (cal/cm3)1/2 or larger, the difference in SP value between the resin component C and the diene-based rubber component A is 1.40 (cal/cm3)1/2 or less, the mass ratio R of the resin component C to the diene-based rubber component A, (resin component C)/(diene-based rubber component A), is 0.5 or greater, and, when the loss factor at a frequency F (Hz) determined with an atomic force microscope is expressed by tanδF, a given relationship (a) is satisfied when F≥100.

Inventors:
KAWASHIMA MASAHIRO (JP)
Application Number:
PCT/JP2022/016940
Publication Date:
December 01, 2022
Filing Date:
March 31, 2022
Export Citation:
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Assignee:
BRIDGESTONE CORP (JP)
International Classes:
C08L9/00; B60C1/00; C08F236/10; C08L7/00; C08L9/06; C08L101/00
Domestic Patent References:
WO2017209261A12017-12-07
WO2017209263A12017-12-07
WO2017209262A12017-12-07
WO2003046020A12003-06-05
Foreign References:
JP2019108515A2019-07-04
JP2017203111A2017-11-16
JP2011099026A2011-05-19
JP2011088988A2011-05-06
JP2011088998A2011-05-06
JP2019194289A2019-11-07
JP2011094012A2011-05-12
JP2013227375A2013-11-07
JP2020527185A2020-09-03
JP2007217562A2007-08-30
Other References:
"Nanorheological Mapping of Rubbers by Atomic Force Microscopy", MACROMOLECULES, vol. 46, 2013, pages 1916 - 1922
R. R. HAMPTON, ANALYTICAL CHEMISTRY, vol. 21, 1949, pages 923
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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