Title:
RUBBER COMPOSITION FOR TIRES
Document Type and Number:
WIPO Patent Application WO/2024/038830
Kind Code:
A1
Abstract:
Provided is a rubber composition for tires which is excellent in terms of wear resistance and wet performance and has excellent moldability. The rubber composition is one obtained by incorporating 50-150 parts by mass of silica and 10-80 parts by mass of a thermoplastic resin into 100 parts by mass of diene-based rubbers comprising a styrene/butadiene rubber (A), a styrene/butadiene rubber (B), and butadiene rubber, and is characterized in that the butadiene rubber and the styrene/butadiene rubber (A) are contained in amounts of 30 mass% or larger and 15-35 mass%, respectively, with respect to the diene-based rubbers, the amount of which is taken as 100 mass%, that the content of the styrene/butadiene rubber (B) is 1-2 times by mass that of the styrene/butadiene rubber (A), that the styrene/butadiene rubber (A) has a glass transition temperature of -75°C to -50°C, and that the styrene/butadiene rubber (B) has a weight-average molecular weight which is at least twice the weight-average molecular weight of the styrene/butadiene rubber (A).
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Inventors:
MURASE KEISUKE (JP)
Application Number:
PCT/JP2023/029302
Publication Date:
February 22, 2024
Filing Date:
August 10, 2023
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08L9/06; B60C1/00; C08K3/36
Domestic Patent References:
| WO2021084858A1 | 2021-05-06 |
Foreign References:
| JP2020029474A | 2020-02-27 | |||
| JP2019001898A | 2019-01-10 | |||
| JP2022035560A | 2022-03-04 | |||
| JP2015196814A | 2015-11-09 | |||
| JP2021004332A | 2021-01-14 |
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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