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US 2014/0350159 A1Published application
Functionalized silica with elastomer binder
AssigneeCooper Tire & Rubber Company
InventorsPeter John Wallen, Howard Colvin
Life of this patent
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Abstract
A functionalized silica product includes particles of a hydrophobated silica having a coating of a polymer. A ratio of the hydrophobated silica to the polymer is from about 0.3/1 to about 100/1. The functionalized silica product may be in the form of a friable crumb or a powder, or in the form of a bale, that may be mixed into an elastomer formulation for a rubber article, such as a tire component.
Claims20
A functionalized silica product, comprising:
- particles of a hydrophobated silica having a coating of a polymer, wherein a ratio of the hydrophobated silica to the polymer is from about 0.3/1 to about 100/1, wherein the hydrophobated silica includes a high surface area silica having a BET specific surface area greater than about 200 m2/g.
A rubber formulation, comprising:
- a quantity of elastomer;
- and
- a quantity of particles of a hydrophobated silica having a coating of a polymer, wherein a ratio of the hydrophobated silica to the polymer is from about 0.3/1 to about 100/1, wherein the hydrophobated silica includes a high surface area silica having a BET specific surface area greater than about 200 m2/g,
- the particles substantially evenly distributed throughout the elastomer.
1 more element
A method for manufacturing a functionalized silica product, the method comprising the steps of:
- providing a hydrophobated high surface area silica in a rotary dryer;
- introducing a polymer cement to the rotary dryer, the polymer cement having a solution polymer at least partially dissolved in a solvent;
- and
- heating the rotary dryer to drive off the solvent, wherein a functionalized silica product is formed with particles of the hydrophobated silica having a coating of the solution polymer, wherein a ratio of the hydrophobated silica to the solution polymer is from about 0.3/1 to about 100/1, wherein the hydrophobated silica includes a high surface area silica having a BET specific surface area greater than about 200 m2/g.
1 more element
Dependencies are inferred from the claim text.