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US 2021/0230402 A1Published application
Tire Tread Rubber Composition
AssigneeBridgestone Americas Tire Operations, LLC
InventorsJames P. Kleckner, Anthony M. Unger, 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 styrene-butadiene rubber and polybutadiene.
Claims21
1-21. (canceled)
A tire tread rubber composition comprising:
- a. 100 parts of an elastomer component comprising
- i. 30-60 parts of styrene-butadiene rubber, and
- ii. 30-60 parts of polybutadiene rubber having a cis bond content of at least 95% and a Tg of less than −101° C.,
- b. at least one reinforcing silica filler in an amount of 81-120 phr,
- c. no more than 15 phr of carbon black filler,
- d. 11-35 phr of at least one hydrocarbon resin having a Tg of about 30 to about 50° C.,
- e. 0-40 phr, and
- f. a cure package,
- wherein the total amount of (d) and (e) is no more than 59 phr.
6 more elements
A tire tread rubber composition comprising:
- a. 100 parts of an elastomer component comprising
- i. 40-60 parts of styrene-butadiene rubber having a vinyl bond content of no more than 20% and a Tg of about −40 to about −50° C., and
- ii. 40-60 parts of polybutadiene rubber having a cis bond content of at least 95% and a Tg of less than −101° C.,
- wherein the total amount of (i) and (ii) is 100 parts,
- b. at least one reinforcing silica filler in an amount of 81-120 phr,
- c. no more than 15 phr of carbon black filler,
- d. 11-35 phr of at least one hydrocarbon resin having a Tg of about 30 to about 50° C.,
- e. 0-40 phr, and
- f. a cure package,
- wherein the total amount of (d) and (e) is no more than 50 phr.
7 more elements
A tire tread rubber composition comprising:
- a. 100 parts of an elastomer component comprising
- i. 40-60 parts of styrene-butadiene rubber having a vinyl bond content of no more than 20% and a Tg of about −40 to about −50° C., and
- ii. 40-60 parts of polybutadiene rubber having a cis bond content of at least 95% and a Tg of less than −101° C.,
- wherein the total amount of (i) and (ii) is 100 parts,
- b. at least one reinforcing silica filler in an amount of 81-120 phr,
- c. no more than 15 phr of carbon black filler,
- d. 11-30 phr of at least one aromatic hydrocarbon resin having a Tg of about 30 to about 50° C.,
- e. 0-30 phr oil, and
- f. a cure package,
- wherein the total amount of (d) and (e) is no more than 49 phr.
7 more elements
Dependencies are inferred from the claim text.