Title:
RUBBER COMPOSITION FOR TIRE
Document Type and Number:
WIPO Patent Application WO/2023/106081
Kind Code:
A1
Abstract:
Provided is a rubber composition that is for a tire and that achieves wear resistance and also has dry-grip performance and steering stability in a wide temperature range. The present invention is a mixture that is obtained by blending a total of at least 100 parts by mass of a white filler and carbon black, 0.3-10 parts by mass of a cyclic polysulfide, and 8-50 parts by mass of a thermoplastic resin, to 100 parts by mass of a diene rubber containing at least 30 mass% of a styrene-butadiene rubber having a glass transition temperature of at least -40°C, and that is characterized in that: the diene rubber and the thermoplastic resin are mixed at a mass ratio of 1:1; and the difference Tga-Tgm 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, is at least 10°C.
Inventors:
NAKAGAWA RYUTARO (JP)
Application Number:
PCT/JP2022/043114
Publication Date:
June 15, 2023
Filing Date:
November 22, 2022
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08L9/06; B60C1/00; C08K3/04; C08K5/372; C08L91/00; C08L93/04
Domestic Patent References:
| WO2019026477A1 | 2019-02-07 | |||
| WO2020075829A1 | 2020-04-16 |
Foreign References:
| JP2010235663A | 2010-10-21 | |||
| JP2019131742A | 2019-08-08 | |||
| JP2019019310A | 2019-02-07 |
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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