Title:
TIRE SIDEWALL RUBBER MEMBER AND PNEUMATIC TIRE
Document Type and Number:
WIPO Patent Application WO/2018/070248
Kind Code:
A1
Abstract:
A tire sidewall rubber member according to an embodiment is made of a rubber composition comprising: a diene-based rubber; a reinforcing filler including at least 75 mass% carbon black; a processing aid; and a compound represented by formula (I) (wherein R1 and R2 each represent a hydrogen atom, an alkyl group, an alkenyl group or an alkynyl group, and M+ is Na+, K+ or Li+). The processing aid to be used is at least one type selected from the group consisting of fatty acid metal salts, fatty acid amides and fatty acid esters, and the difference (Tm3-Tm1) between a start point (Tm1) and an end point (Tm3) of an endothermic peak of the processing aid as measured by a differential scanning calorimeter is at least 50°C. Thus, tear resistance is improved while maintaining hardness and low heat-generating properties.
Inventors:
KURIHARA AKIE (JP)
Application Number:
PCT/JP2017/034969
Publication Date:
April 19, 2018
Filing Date:
September 27, 2017
Export Citation:
Assignee:
TOYO TIRE & RUBBER CO (JP)
International Classes:
C08L9/00; B60C1/00; C08K3/04; C08K5/09; C08K5/20
Foreign References:
| JP2014095017A | 2014-05-22 | |||
| JP2013177113A | 2013-09-09 | |||
| JP2013047328A | 2013-03-07 | |||
| JP2005523967A | 2005-08-11 | |||
| JP2011246640A | 2011-12-08 | |||
| JP2008150435A | 2008-07-03 | |||
| JP2015232071A | 2015-12-24 | |||
| JP2017025221A | 2017-02-02 |
Attorney, Agent or Firm:
TSUTADA, Masato et al. (JP)
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