Title:
RUBBER COMPOSITION FOR RIM CUSHIONS
Document Type and Number:
WIPO Patent Application WO/2023/223593
Kind Code:
A1
Abstract:
The present invention provides a rubber composition for rim cushions, the rubber composition being improved in terms of low possibility of heat generation, while maintaining good hardness, elongation at break and wear resistance and achieving a good balance among these properties at high levels. According to the present invention, silica having a CTAB adsorption specific surface area of 60 m2/g to 100 m2/g, carbon black having a CTAB adsorption specific surface area of 60 m2/g to 160 m2/g, and a sulfur-containing silane coupling agent are added to a diene rubber that contains 35% by mass to 65% by mass of an isoprene rubber and 35% by mass to 65% by mass of a butadiene rubber; at least one terminally modified butadiene rubber for silica is used as the butadiene rubber; the addition amount of the silica relative to 100 parts by mass of the diene rubber is set to 10 parts by mass or more; the total addition amount of the silica and the carbon black relative to 100 parts by mass of the diene rubber is set to more than 50 parts by mass; and the product of the stress M100 at 100% elongation and the hardness is set to 150 or more.
Inventors:
KARASAWA YUICHIRO (JP)
KITAMURA TAKAMASA (JP)
KITAMURA TAKAMASA (JP)
Application Number:
PCT/JP2022/047591
Publication Date:
November 23, 2023
Filing Date:
December 23, 2022
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
C08L7/00; B60C1/00; B60C15/06; C08K3/04; C08K3/06; C08K3/36; C08K5/548; C08L9/00; C08L15/00
Domestic Patent References:
| WO2020064960A1 | 2020-04-02 |
Foreign References:
| JP2014185338A | 2014-10-02 | |||
| JP2019065238A | 2019-04-25 |
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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