Title:
RUBBER COMPOSITION AND TIRE
Document Type and Number:
Japanese Patent JP2018177920
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a rubber composition and a tire having excellent processability, wear resistance and grip performance in a balanced manner and suppressing bleeding.SOLUTION: The rubber composition comprises: a rubber component containing a conjugate diene polymer (component A) by 60 mass% or more, which has a weight average molecular weight of 1.5×10to 3.0×10and an aromatic vinyl content of 60 mass% or less; a conjugate diene polymer (component B) by 10 to 200 parts by mass with respect to 100 parts by mass of the above rubber component, which has a weight average molecular weight of 1.0×10to 1.0×10, an aromatic vinyl content of 70 mass% or less, a vinyl bond amount of 20 to 70% in a conjugate diene moiety, a hydrogenation rate of 56% or more, and a viscosity of 100000 or more measured by a B-type viscometer at 25°C; and predetermined component C and component D. The total content of component B, component C and component D is 80 parts by mass or more. An absolute value of the difference between the aromatic vinyl content of the component A and the aromatic vinyl content of component B is less than 15, otherwise, the aromatic vinyl content of component A is greater than the aromatic content of component B as well as an absolute value of the difference between the aromatic vinyl content of component A and the aromatic content of component B is less than 20.SELECTED DRAWING: None
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Inventors:
WASHIZU KENSUKE
Application Number:
JP2017077596A
Publication Date:
November 15, 2018
Filing Date:
April 10, 2017
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
C08L9/06; C08L15/00; C08L91/00
Domestic Patent References:
| JP2006213807A | 2006-08-17 | |||
| JP2016176022A | 2016-10-06 | |||
| JP2016204504A | 2016-12-08 | |||
| JP2014015583A | 2014-01-30 |
Foreign References:
| KR20160040901A | 2016-04-15 |
Attorney, Agent or Firm:
Asahina Patent Office