Title:
RUBBER COMPOSITION FOR TIRES
Document Type and Number:
WIPO Patent Application WO/2023/176832
Kind Code:
A1
Abstract:
Provided is a rubber composition for tires which is excellent in wear resistance and wet performance, and which is configured to reduce rolling resistance and temperature dependency. The rubber composition for tires is obtained by blending, in 100 parts by mass of a diene rubber comprising a 55 mass% or more solution-polymerized styrene-butadiene rubber having a glass transition temperature of -50°C, at least 30 parts by mass but less than 100 parts by mass of a white filling agent, at least 15 parts by mass of a thermoplastic resin, and, with respect to the mass of the white filling agent, a 3-20 mass% silane coupling agent represented by a specific average composition formula. The rubber composition is characterized in that, with respect to a mixture of the diene rubber and the thermoplastic resin at a mass ratio of 1:1, a difference, Tga-Tgm, is 10°C or less, said difference being between: a theoretical value Tga of the glass transition temperature of the mixture, calculated from the glass transition temperatures of the diene rubber and the thermoplastic resin; and a measured value Tgm of the glass transition temperature of the mixture.
Inventors:
TAKEUCHI KENTARO (JP)
NAKAGAWA RYUTARO (JP)
OSUMI KAORI (JP)
NAKAGAWA RYUTARO (JP)
OSUMI KAORI (JP)
Application Number:
PCT/JP2023/009846
Publication Date:
September 21, 2023
Filing Date:
March 14, 2023
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08L9/06; B60C1/00; C08K3/00; C08K5/548; C08L101/00
Domestic Patent References:
| WO2013001826A1 | 2013-01-03 | |||
| WO2023281854A1 | 2023-01-12 | |||
| WO2023281855A1 | 2023-01-12 |
Foreign References:
| JP2013185092A | 2013-09-19 | |||
| JP2011122057A | 2011-06-23 | |||
| JP2013227375A | 2013-11-07 | |||
| JP2019104484A | 2019-06-27 |
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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