Silica-rich rubber compositions and methods of making same
AssigneeThe Goodyear Tire & Rubber Company
InventorPaul Harry Sandstrom
Life of this patent
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Abstract
The invention includes a silica-rich rubber composition, which exhibits good processing characteristics and improved wet traction characteristics, a method for making and a tire having a tread component including the same. In one embodiment, a rubber composition includes at least one elastomer, from about 30 phr to about 120 phr silica reinforcing filler, from about 0 phr to about 30 phr carbon black reinforcing filler, from about 3 phr to about 10 phr of rosin acid, and from about phr to about 7 phr of zinc oxide, provided that no free stearic acid is separately included in the rubber composition.
Claims19
A rubber composition comprising:
- at least one elastomer,
- from about 30 phr to about 120 phr silica reinforcing filler,
- from about 0 phr to about 30 phr carbon black reinforcing filler,
- from about 3 phr to about 10 phr of rosin acid, and
- from about 1 phr to about 7 phr of zinc oxide, with the proviso that no free stearic acid is separately included in the rubber composition.
A tire comprising:
- A tire tread including a rubber composition comprising:
- at least one elastomer,
- from about 30 phr to about 120 phr silica reinforcing filler,
- from about 0 phr to about 30 phr carbon black reinforcing filler,
- from about 3 phr to about 10 phr of rosin acid, and
- from about 1 phr to about 7 phr of zinc oxide, with the proviso that no free stearic acid is separately included in the rubber composition.
A method of preparing a tire tread rubber composition comprising:
- in a non-productive stage, mixing at least the following components at a temperature from about 140° C. to about 190° C.:
- (1) at least one elastomer;
- (2) about 0 phr to about 30 phr of carbon black reinforcing filler;
- (3) about 30 phr to about 120 phr silica reinforcing filler;
- (4) from about 3 phr to about 10 phr of rosin acid, and
- (5) from about 1 phr to about 7 phr of zinc oxide;
- and
- subsequently mixing with the non-productive stage components, a sulfur curing agent at a temperature from about 100° C. to about 120° C.,
- with the proviso that no free stearic acid is separately included in the rubber composition.
Dependencies are inferred from the claim text.