Title:
ゴム組成物
Document Type and Number:
Japanese Patent JP6972932
Kind Code:
B2
Abstract:
To provide a rubber composition having excellent abrasion resistance.SOLUTION: There is provided a rubber composition comprising a rubber component and silica, wherein the rubber component is composed of a rubber component (a): a modified styrene-butadiene rubber for silica having a styrene content of 15 to 50 mass%, a weight average molecular weight (Mw) of 200000 or more and a terminal modification rate of 30 to 100%, a component (b): a non-modified styrene-butadiene rubber having a styrene content of 15 to 50 mass%, an Mw of 500000 to 2000000, a rubber component (c): a modified butadiene rubber for silica having an Mw of 100000 or more and a terminal modification rate of 30 to 100% and a rubber component (d): a non-modified BR having a cis content of 90 mass% or more and an Mw of 200000 or more, the content of each rubber component in all rubber components is more than 0 mass% and the rubber composition satisfies the following relational expressions: (expression A) (a)+(b)+(c)+(d)=100 mass%, (expression B) 40 mass%≥(c)+(d)≥10 mass% and (expression C) 90 mass%≥(a)+(b)≥60 mass%.SELECTED DRAWING: None
Inventors:
Takayuki Nagase
Application Number:
JP2017212233A
Publication Date:
November 24, 2021
Filing Date:
November 01, 2017
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
C08L9/00; B60C1/00; C08K3/36; C08L9/06; C08L15/00; C08L25/00; C08L45/02; C08L57/00
Domestic Patent References:
| JP2014118513A | ||||
| JP2009143547A | ||||
| JP2010111753A |
Foreign References:
| WO2014021002A1 | ||||
| WO2012165038A1 |
Attorney, Agent or Firm:
Asahina Patent Office