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US 2021/0229494 A1Published application
Tire Tread Rubber Composition
AssigneeBridgestone Americas Tire Operations, LLC
InventorsJamie L. Whyte, Yasushi Yamagishi, Benjamin C. Galizio
Life of this patent
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Abstract
Disclosed herein are tire tread rubber compositions comprising a specified elastomer component, reinforcing silica filler, a specified hydrocarbon resin, a cure package, and optionally oil. The elastomer component includes at least one styrene-butadiene rubber having a silica-reactive functional group; and natural rubber, polyisoprene, or a combination thereof.
Claims21
1-19. (canceled)
A tire tread rubber composition comprising:
- a. 100 parts of an elastomer component comprising:
- i. at least 45 parts of one or more styrene-butadiene rubbers having a silica-reactive functional group, and
- ii. 10-55 parts of natural rubber, polyisoprene, or a combination thereof,
- b. at least one reinforcing silica filler in an amount of 50-150 phr,
- c. 11-40 phr of at least one hydrocarbon resin having a Tg of about 35 to about 60° C.,
- d. less than 10 phr of oil, and
- e. a cure package.
- wherein (c) and (d) are present in a total amount of less than 50 phr.
5 more elements
A tire tread rubber composition comprising:
- a. 100 parts of an elastomer component comprising:
- i. at least 50 parts, of one or more styrene-butadiene rubbers having a silica-reactive functional group and each having a Tg of about −65 to about −40° C., and
- ii. 10-50 parts of natural rubber, polyisoprene, or a combination thereof,
- b. at least one reinforcing silica filler in an amount of 50-89 phr,
- c. 11-40 phr of at least one hydrocarbon resin having a Tg of about 35 to about 60° C.,
- d. less than 10 phr of oil, and
- e. a cure package,
- wherein (c) and (d) are present in a total amount of no more than 40 phr and the composition contains no more than 20 phr of carbon black filler.
5 more elements
A tire tread rubber composition comprising:
- a. 100 parts of an elastomer component comprising:
- i. at least 50 parts of two styrene-butadiene rubbers having a silica-reactive functional group each rubber having a Tg of about −65 to about −40° C. and a Mw of 250,000 to 600,000 grams/mole,
- ii. 10-50 parts of natural rubber, polyisoprene, or a combination thereof, and
- iii. 0-5 phr of polybutadiene rubber.
- b. at least one reinforcing silica filler in an amount of 50-89 phr,
- c. 11-40 phr of at least one hydrocarbon resin having a Tg of about 35 to about 60° C.,
- d. less than 10 phr of oil, and
- e. a cure package,
- wherein (c) and (d) are present in a total amount of no more than 40 phr and the composition contains no more than 20 phr of carbon black filler.
6 more elements
Dependencies are inferred from the claim text.