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US 2021/0229496 A1Published application
Tire Tread Rubber Composition
AssigneeBridgestone Americas Tire Operations, LLC
InventorsAnthony M. Unger, Adrian C. Stalnaker, Jessica L. Placke, Benjamin C. Galizio
Life of this patent
Estimating the term…
Abstract
Disclosed herein are tire tread rubber compositions comprising a specified elastomer component, reinforcing silica filler, a specified hydrocarbon resin, oil, and a cure package. The elastomer component includes styrene-butadiene rubber; polybutadiene; and natural rubber, polyisoprene, or a combination thereof.
Claims21
1-18. (canceled)
A tire tread rubber composition comprising:
- a. 100 parts of an elastomer component comprising
- i. 25-45 parts of at least one styrene-butadiene rubber having a Tg of about −10 to about −20° C.,
- ii. 30-50 parts of polybutadiene having a cis bond content of at least 95% and a Tg of less than −101° C., and
- iii. 20-35 parts of natural rubber, polyisoprene, or a combination thereof,
- b. 100-150 phr of at least one reinforcing silica filler having a surface area of about 100 to about 400 m2/g,
- c. 15-40 phr of at least one hydrocarbon resin having a Tg of about 70 to about 110° C.,
- d. 10-30 phr of at least one oil,
- e. a cure package.
5 more elements
A tire tread rubber composition comprising
- a. 100 parts of an elastomer component comprising
- i. 25-45 parts of at least one oil-extended styrene-butadiene rubber having a Tg of about −10 to about −20° C. and a Mw of 700,000 to 950,000 grams/mole,
- ii. 30-50 parts of polybutadiene having a cis bond content of at least 95% and a Tg of less than −101° C., and
- iii. 20-35 parts of natural rubber, polyisoprene, or a combination thereof,
- b. 100-150 phr of at least one reinforcing silica filler having a surface area of about 100 to about 400 m2/g,
- c. 15-40 phr of at least one hydrocarbon resin having a Tg of about 80 to about 100° C.,
- d. 10-30 phr of at least one oil, and
- e. a cure package.
5 more elements
A tire tread rubber composition comprising
- a. 100 parts of an elastomer component comprising
- i. 25-45 parts of at least one oil-extended styrene-butadiene rubber having a Tg of about −10 to about −20° C. and a Mw of 700,000 to 950,000 grams/mole,
- ii. 30-50 parts of polybutadiene having a cis bond content of at least 95% and a Tg of less than −101° C., and
- iii. 20-35 parts of natural rubber, polyisoprene, or a combination thereof,
- b. 110-150 phr of at least one reinforcing silica filler having a surface area of about 100 to about 400 m2/g and no more than 20 phr of carbon black filler,
- c. 15-40 phr of at least one cycloaliphatic hydrocarbon resin having a Tg of about 70 to about 110° C.,
- d. 10-30 phr of at least one oil, and
- e. a cure package.
5 more elements
Dependencies are inferred from the claim text.