Rubber composition for tire tread and tire
AssigneeToyo Tire Corporation
InventorYuma Nishikawa
Life of this patent
Estimating the term…
Abstract
A rubber composition for a tire tread according to an embodiment includes 100 parts by mass of a diene rubber, 60 to 200 parts by mass of silica, and 20 to 60 parts by mass of a terpene-based resin having a β-pinene unit content of 40 mass % or more, and further includes 5 to 20 parts by mass of a thioester group-containing silane coupling agent per 100 parts by mass of silica. The diene rubber component contains a butadiene rubber and a styrene butadiene rubber having a glass transition temperature of −50° C. or less, in which the content of the butadiene rubber is 20 parts by mass or more, and the average glass transition temperature of the diene rubber component is −60° C. or less.
Claims16
A rubber composition for a tire tread, comprising:
- 100 parts by mass of a diene rubber component containing a butadiene rubber and a styrene butadiene rubber having a glass transition temperature of −50° C. or less, wherein the content of the butadiene rubber is 20 parts by mass or more, and the average glass transition temperature of the diene rubber component is −60° C. or less;
- 60 to 200 parts by mass of silica;
- and
- 20 to 60 parts by mass of a terpene-based resin having a β-pinene unit content of 40 mass % or more,
- the rubber composition for a tire tread further comprising 5 to 20 parts by mass of a thioester group-containing silane coupling agent per 100 parts by mass of the silica.
Dependencies are inferred from the claim text.