Rubber composition and tire comprising sustainable resources and related methods
AssigneeBridgestone Americas Tire Operations, LLC
InventorJustin J. Styer
Life of this patent
Estimating the term…
Abstract
Recycled elements and/or renewable resources, such as recycled carbon black or recycled carbon black and recycled particulate rubber, are incorporated into a rubber composition. The rubber composition can be used to manufacture tires or various tire components including tire subtreads.
Claims20
A tire subtread comprising a rubber composition comprising
- a rubber elastomer comprising 25 to 90 phr of natural rubber or polyisoprene and 75 to 10 phr of polybutadiene or styrene-butadiene,
- a recycled particulate rubber in an amount of about 1 phr to about 45 phr,
- about 1 to about 40 phr of a plant oil, and
- reinforcing filler including about 1 to about 45 phr of a recycled carbon black, up to about 30 phr of a carbon black other than the recycled carbon black, and about 1 to about 30 phr of silica,
- wherein the composition contains no more than 10 phr of any oil other than the plant oil.
A tire subtread comprising a rubber composition comprising a rubber elastomer comprising at least 50 phr of natural rubber or polyisoprene, a recycled particulate rubber in an amount of about 5 to about 45 phr, about 1 to about 40 phr of a plant oil, reinforcing filler including about 1 to about 45 phr of a recycled carbon black, up to about 30 phr of a carbon black other than the recycled carbon black, and about 1 to about 30 phr of silica, wherein the composition contains no more than 10 phr of any oil other than the plant oil.
A tire subtread comprising a rubber composition comprising
- a rubber elastomer comprising 25 to 90 phr of guayule natural rubber and 75 to 10 phr of polybutadiene or styrene-butadiene,
- a recycled particulate rubber in an amount of about 1 phr to about 45 phr,
- about 1 to about 40 phr of a plant oil selected from soybean oil, sunflower oil, or a mixture thereof, and
- reinforcing filler including about 1 to about 45 phr of a recycled carbon black, about 10 to about 30 phr of a carbon black other than the recycled carbon black, and about 10 to about 30 phr of silica,
- wherein the composition contains no more than 10 phr of any oil other than the plant oil, and
- wherein the reinforcing filler has an overall ratio of carbon black to silica of 2/1 to ½.
Dependencies are inferred from the claim text.