Low rolling resistance coating composition
AssigneeThe Goodyear Tire & Rubber Company
InventorsDawn Michelle Johnson, Carolin Anna Welter, Ryan Michael Schmidt
Life of this patent
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Abstract
A rubber composition suited to forming a tire ply includes 100 phr of elastomer, at least 30 phr of an intermediate carbon black, at least 5 phr silica, such as high surface area silica particles, at least 0.1 phr of a tear strength agent, a sulfur-based curing agent, and an accelerator for the curing agent. The elastomer incudes 60-100 phr of a conjugated diene elastomer. The intermediate carbon black has a statistical thickness surface area (STSA) of from 50 m2/g to 70 m2/g.
Claims20
A rubber composition comprising:
- 100 phr of elastomer, the elastomer comprising 60-100 phr of a conjugated diene elastomer;
- at least 20 phr of an intermediate carbon black, the intermediate carbon black having a statistical thickness surface area (STSA), as determined according to ASTM D6556-21, of from 50 m2/g to 70 m2/g;
- at least 5 phr silica;
- at least 0.1 phr of a tear strength agent;
- a sulfur-based curing agent;
- and
- an accelerator for the curing agent.
A method of forming a cord-reinforced rubber component comprising:
- forming a rubber composition, comprising combining 100 phr of elastomer, the elastomer comprising 60-100 phr of a conjugated diene elastomer, at least 30 phr of an intermediate carbon black, the intermediate carbon black having a surface area (STSA) of from 50 m2/g to 70 m2/g, at least 0.1 phr of a tear strength agent, a sulfur-based curing agent, and an accelerator for the curing agent;
- coating at least one cord with the rubber composition;
- and
- curing the rubber composition coating the at least one cord to form the cord-reinforced rubber component.
A ply of a tire formed by coating a plurality of cords with a rubber composition and curing the rubber composition, the rubber composition comprising:
- 100 phr of elastomer comprising 60-100 phr cis 1,4 polyisoprene;
- 20-60 phr of an intermediate carbon black;
- 6-20 phr silica having a CTAB surface area of at least 220 m2/g;
- 0.1-6 phr of a silica coupling agent;
- 0.1-3 phr of a tear strength agent;
- 0.1-5 phr of a cobalt salt;
- 0.1-10 phr of an antidegradant;
- 0.5-10 phr of a fatty acid;
- 1-20 phr of zinc oxide;
- 0.1-10 phr of a sulfur-based curing agent;
- and
- 0.2-5 phr of a cure accelerator.
Dependencies are inferred from the claim text.