Rubber composition for tires, and pneumatic tires
AssigneeSumitomo Rubber Industries, Ltd.
InventorHayato YOSHIYASU
Life of this patent
Estimating the term…
Abstract
The present invention provides a rubber composition for tires which provides a balanced improvement in ice performance, fuel economy, and abrasion resistance, and a pneumatic tire containing the rubber composition. The present invention relates to a rubber composition for tires containing a rubber component including at least 80% by mass in total of at least one of an isoprene-based rubber, a polybutadiene rubber, or a styrene-butadiene rubber, the rubber composition containing, per 100 parts by mass of the rubber component, 10 to 120 parts by mass of silica, 0.2 to 10 parts by mass of a tetrazine compound of formula (1), and 1 to 50 parts by mass of a low-molecular-weight diene polymer having a weight average molecular weight of 200,000 or less.
Claims7
A rubber composition for tires, comprising a rubber component comprising at least 80% by mass in total of at least one of an isoprene-based rubber, a polybutadiene rubber, or a styrene-butadiene rubber,
- the rubber composition comprising, per 100 parts by mass of the rubber component:
- 10 to 120 parts by mass of silica;
- 0.2 to 10 parts by mass of a tetrazine compound represented by the formula (1) below;
- and
- 1 to 50 parts by mass of a low-molecular-weight diene polymer having a weight average molecular weight of 200,000 or less,
- wherein R1 and R2 may be the same or different and each represent a hydrogen atom, —COOR3 in which R3 represents either a hydrogen atom or an alkyl group, or a C1-C11 monovalent hydrocarbon group optionally containing a heteroatom, and R1 and R2 may each form a salt.
Dependencies are inferred from the claim text.