Title:
TIRE RUBBER COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/176830
Kind Code:
A1
Abstract:
The present invention provides a tire rubber composition which has outstanding wear resistance, dry performance, and wet performance, and which maintains a high level of grip performance even after extended use. The present invention is such that 15 parts by mass or more of a thermoplastic resin is blended into 100 parts by mass of a diene rubber containing 55 mass% or more of a styrene butadiene rubber, the styrene butadiene rubber has a glass transition temperature of -55°C or less, the total of styrene monomer-derived units and vinyl monomer-derived units is 50 mol% or less, and the following are satisfied: (i) in a mixture in which the diene rubber and the thermoplastic resin are blended at a mass ratio of 1:1, a difference Tga-Tgm between a theoretical value Tga and a measurement value Tgm of the glass transition temperature of the mixture is 10°C or less; and (ii) in relation to a rubber composition B in which all of the thermoplastic resin of the tire rubber composition has been replaced with oil, the ratio of maximum loss tangents tanδMAXA and tanδMAXB at -40°C to 60°C of the tire rubber composition and the rubber composition B is greater than 0.8.
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| WO/2019/043930 | RUBBER COMPOSITION FOR TIRE |
| WO/2018/150948 | TIRE |
| WO/2023/104783 | FUNCTIONALIZED DIENE RUBBERS PREPARED WITH UNSATURATED SILOXANE-BASED COUPLING AGENTS |
Inventors:
NAKAGAWA RYUTARO (JP)
OSUMI KAORI (JP)
TAKEUCHI KENTARO (JP)
OSUMI KAORI (JP)
TAKEUCHI KENTARO (JP)
Application Number:
PCT/JP2023/009843
Publication Date:
September 21, 2023
Filing Date:
March 14, 2023
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08L9/06; B60C1/00; 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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