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US 10,590,254 B2Granted
Rubber composition and pneumatic tire
AssigneeSumitomo Rubber Industries, Ltd.
InventorsRyota Kitago, Yuuki Kawana
Life of this patent
Estimating the term…
Abstract
The present invention provides rubber compositions that can achieve both abrasion resistance and low heat build-up properties, and pneumatic tires including such rubber compositions. The present invention relates to a rubber composition containing one or more carbon blacks, at least one of which is produced from a feedstock oil that has a BMCI value of not greater than 150 and an aliphatic hydrocarbon content of not less than 30% by mass.
Claims15
A rubber composition, comprising:
- a rubber component, oil, an isoprene-based rubber, and one or more carbon blacks,
- wherein at least one of the one or more carbon blacks has, as aggregate properties, a mode diameter (Dmod) of a Stokes' diameter distribution curve of not greater than 79 nm, a ratio (ΔD50/Dmod) of a half width (ΔD50) of the distribution curve to the Dmod of not less than 1.0, a 24M4 dibutyl phthalate oil absorption of 70 to 120 cm3/100 g, a cetyltrimethylammonium bromide adsorption specific surface area (CTAB) of 60 to 135 m2/g, an iodine adsorption of 120 to 250 mg/g, and a ratio of a cetyltrimethylammonium bromide adsorption specific surface area (CTAB) to the iodine adsorption of 0.9 to 1.1 m2/mg, and
- wherein the oil is present in an amount of 1 to 8 parts,
- the amount of isoprene-based rubber based on 100% by mass of the rubber component is not less than 60% by mass.
1 more element
Dependencies are inferred from the claim text.