Tread rubber composition and pneumatic tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorTatsuhiro TANAKA
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Abstract
Provided are a tread rubber composition that provides a balanced improvement of fuel economy, fracture strength, and abrasion resistance, and a pneumatic tire including the rubber composition. The present invention relates to a tread rubber composition including: a rubber component; a silica having a nitrogen adsorption specific surface area of 220 m2/g or more; and a mercapto silane coupling agent, the tread rubber composition satisfying the following relationship (A): (A) G*(4%)−G*(64%)≤150 [kPa] wherein G*(4%) is the shear modulus at an applied strain of 4% at 100° C., and G*(64%) is the shear modulus at an applied strain of 64% at 100° C.
Claims3
A pneumatic tire, comprising a tread comprising a tread rubber composition, the tread rubber composition comprising:
- a rubber component;
- a silica having a nitrogen adsorption specific surface area of 220 m2/g or more;
- and
- a mercapto silane coupling agent, the tread rubber composition satisfying the following relationship (A):
- (A) G*(4%)−G*(64%) 150 [kPa]
- wherein G*(4%) is a shear modulus at an applied strain of 4% at 100° C., and G*(64%) is a shear modulus at an applied strain of 64% at 100° C.
Dependencies are inferred from the claim text.