Title:
TIRE RUBBER COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/176831
Kind Code:
A1
Abstract:
Provided is a tire rubber composition by which snow performance, wet performance, and wear resistant performance can be improved, and these performances can be demonstrated with a high degree of balance. The tire rubber composition is obtained by blending a white filler in an amount of 30 parts by mass or more and less than 100 parts by mass and a thermoplastic resin in an amount of 15-80 parts by mass with respect to 100 parts by mass of a diene rubber containing: 55 mass% or more of a styrene-butadiene copolymer having a glass transition temperature of -55°C or more; and 5 mass% or more of a butadiene copolymer. In a mixture obtained by blending the diene rubber and the thermoplastic resin at a mass ratio of 1:1, the difference Tga-Tgm between a theoretical value Tga of the glass transition temperature of the mixture, which is 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 10°C or more.
Inventors:
OSUMI KAORI (JP)
NAKAGAWA RYUTARO (JP)
TAKEUCHI KENTARO (JP)
NAKAGAWA RYUTARO (JP)
TAKEUCHI KENTARO (JP)
Application Number:
PCT/JP2023/009844
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; C08L9/00; 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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