Title:
RUBBER COMPOSITION FOR TIRES
Document Type and Number:
WIPO Patent Application WO/2022/224663
Kind Code:
A1
Abstract:
Provided is a rubber composition for tires that, when used in tires, enables reduction in rolling resistance while favorably maintaining or improving operation stability and durability. In the present invention, relative to 100 parts by mass of a rubber component comprising 50 mass% or more of a natural rubber and 10-40 mass% of a butadiene rubber, 35-60 parts by mass of a carbon black having a CTAB adsorption specific surface area of less than 70 m2/g and 3-30 parts by mass of a silica having a CTAB adsorption specific surface area of less than 180 m2/g are blended, and an unmodified butadiene rubber is used as the butadiene rubber. The unmodified butadiene rubber has a cis-1,4 linkage content of 97% or more, a Mooney viscosity ML1+4 at 100℃ of 45 or more, and the ratio Tcp/ML1+4 of a 5 mass% toluene solution viscosity Tcp (units: cps) at 25℃ to the Mooney viscosity ML1+4 is 2.0-3.0.
Inventors:
OZAKI MAKOTO (JP)
SHIMIZU KATSUNORI (JP)
SHIMIZU KATSUNORI (JP)
Application Number:
PCT/JP2022/012782
Publication Date:
October 27, 2022
Filing Date:
March 18, 2022
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
B60C1/00; B60C11/00; C08K3/04; C08K3/36; C08K5/17; C08L7/00; C08L9/00; C08L9/06
Domestic Patent References:
| WO2019012945A1 | 2019-01-17 |
Foreign References:
| JPH1036559A | 1998-02-10 | |||
| JP2014084312A | 2014-05-12 |
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
Download PDF:
Previous Patent: MOTOR
Next Patent: FEATURE AMOUNT DETERMINATION SYSTEM, FEATURE AMOUNT DETERMINATION METHOD, AND SERVER
Next Patent: FEATURE AMOUNT DETERMINATION SYSTEM, FEATURE AMOUNT DETERMINATION METHOD, AND SERVER