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US 10,850,563 B2Granted
Pneumatic tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorsTetsuya Maekawa, Shinichiro Honda
Life of this patent
Estimating the term…
Abstract
Provided is a pneumatic tire having excellent chipping resistance. The present invention relates to a pneumatic tire formed from a rubber composition, the rubber composition having an elongation at break of 540% or higher as measured under the following test conditions: Tensile rate: 8.3 m/sec, Temperature: 75° C., Specimen: No. 3 dumbbell.
Claims8
A pneumatic tire, formed from a rubber composition, the rubber composition comprising:
- a rubber component comprising natural rubber, styrene-butadiene rubber and polybutadiene rubber;
- carbon black having a nitrogen adsorption specific surface area of 140 m2/g to 190 m2/g;
- and
- silica,
- wherein
- an amount of the natural rubber based on 100% by mass of the rubber component is 50 to 90% by mass,
- an amount of the styrene-butadiene rubber based on 100% by mass of the rubber component is 5 to 40% by mass,
- an amount of the polybutadiene rubber based on 100% by mass of the rubber component is 5 to 40% by mass,
- an amount of the carbon black per 100 parts by mass of the rubber component is 50 to 70 parts by mass,
- an amount of the silica per 100 parts by mass of the rubber component is 30 to 50 parts by mass, and
- the rubber composition has an elongation at break of 540% or higher as measured under the following test conditions:
- Tensile rate:
- 8.3 m/sec,
- Temperature:
- 75° C.,
- Specimen:
- No. 3 dumbbell.
14 more elements
Dependencies are inferred from the claim text.