Title:
RUBBER COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2024/034665
Kind Code:
A1
Abstract:
Provided is a rubber composition constituted so as to achieve a balance between abrasion resistance, low rolling resistance and wet grip performance. This rubber composition contains 20-150 parts by mass of a white filler and a total of not less than 20 parts by mass and less than 50 parts by mass of a thermoplastic resin and, optionally, a plasticizer relative to 100 parts by mass of a diene-based rubber including a styrene-butadiene rubber. The thermoplastic resin accounts for 75 mass% or more of the total amount. The relationships |σbf-σaf| ≥ 4 and |tanδbf-tanδaf| ≤ 0.02 are satisfied when: the half value width of a tanδ temperature dependency curve of the rubber composition is denoted by σbf (ºC); the tanδ value at a temperature that is 90°C higher than the peak temperature at a maximum tanδ value of the rubber composition is denoted by tanδbf; the half value width of a tanδ temperature dependency curve of the rubber composition after the rubber composition is treated by being immersed in toluene and then dried is denoted by σaf (ºC); and the tanδ value at a temperature that is 90°C higher than the peak temperature at a maximum tanδ value of the treated rubber composition is denoted by tanδaf.
Inventors:
NAKAGAWA RYUTARO (JP)
Application Number:
PCT/JP2023/029284
Publication Date:
February 15, 2024
Filing Date:
August 10, 2023
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08K3/013; C08L9/00; C08L23/20; C08L25/16; C08L93/00
Domestic Patent References:
| WO2020179582A1 | 2020-09-10 | |||
| WO2020066527A1 | 2020-04-02 |
Foreign References:
| JP2017206583A | 2017-11-24 | |||
| JP2013166864A | 2013-08-29 |
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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