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US 12,466,214 B2Granted
Tire tread rubber composition
AssigneeBridgestone Americas Tire Operations, LLC
InventorsAnthony M. Coffman, 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 guayule natural rubber.
Claims20
A tire tread rubber composition for an all weather tire comprising
- a. 100 parts of an elastomer component comprising
- i. 10-20 parts of polybutadiene rubber having a cis bond content of at least 95% and a Tg of less than −101° C.,
- ii. 30-45 parts of at least one styrene-butadiene rubber having a Tg of about −50 to about −75° C. and a Mw of 300,000 to 600,000 grams/mole, wherein the at least one styrene-butadiene rubber has a silica-reactive functional group comprising alkoxysilyl groups, and
- iii. 40-50 parts of natural rubber consisting of guayule natural rubber;
- b. 80-140 phr of at least one reinforcing silica filler having a surface area of about 100 to about 400 m2/g and 1-20 phr of carbon black filler;
- c. 30-50 phr of at least one hydrocarbon resin having a Tg of about 30 to about 50° C.;
- d. 15-30 phr of oil;
- and
- e. a cure package.
6 more elements
A tire tread rubber composition for an all weather tire comprising
- a. 100 parts of an elastomer component comprising
- i. 10-20 parts of polybutadiene rubber having a cis bond content of at least 95% and a Tg of less than −101° C.,
- ii. 30-45 parts of at least one styrene-butadiene rubber having a Tg of about −50 to about −75° C. and having a Mw of 300,000 to 600,000 grams/mole, wherein the at least one styrene-butadiene rubber has a silica-reactive functional group comprising alkoxysilyl groups,
- iii. 40-50 parts of natural rubber consisting of guayule natural rubber;
- b. 100-130 phr of at least one reinforcing silica filler having a surface area of about 100 to about 400 m2/g and 1-20 phr of carbon black filler;
- c. 30-50 phr of at least one aromatic hydrocarbon resin having a Tg of about 30 to about 50° C.;
- d. 15-30 phr of oil;
- and
- e. a cure package.
6 more elements
A tire tread rubber composition for an all weather tire comprising
- a. 100 parts of an elastomer component comprising
- i. 10-20 parts of polybutadiene having a cis bond content of at least 95% and a Tg of less than −101° C.,
- ii. 30-45 parts of at least one styrene-butadiene rubber having a Tg of about −50 to about −65° C. and having a silica-reactive functional group comprising alkoxysilyl groups,
- iii. 40-50 parts of natural rubber consisting of guayule natural rubber;
- b. 100-130 phr of at least one reinforcing silica filler having a surface area of about 100 to about 140 m2/g and 1-20 phr of carbon black filler,
- c. 30-50 phr of at least one aromatic hydrocarbon resin having a Tg of about 30 to about 50° C.,
- d. 15-24 phr of oil, and
- e. a cure package.
5 more elements
Dependencies are inferred from the claim text.