Halogenated wax grafted to low molecular weight polymer
AssigneeBridgestone Corporation
InventorsYaohong Chen, Xiao-Dong Pan, Dennis R. Brumbaugh, Edward D. Kelley
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Abstract
A wax-polymer compound includes (a) a polymer component that is a polymerized unsaturated monomer, optionally copolymerized with a vinyl-aromatic monomer, and (b) a halogenated hydrocarbon wax component. The polymer component is grafted to the halogenated hydrocarbon wax component, and the wax-polymer compound has a number average molecular weight of about 1,000 to about 100,000. A method of making the wax-polymer compound and a coated silica particle are also disclosed.
Claims20
A tire component comprising:
- a rubber elastomer comprising a polymerized unsaturated monomer and optionally a polymerized vinyl-aromatic monomer, the rubber elastomer having a number average molecular weight of about 100,000 to about 1,000,000;
- a filler in an amount of about 5 to about 200 phr, the filler comprising carbon black, silica, or both;
- and
- a wax-polymer additive that includes:
- (a) a polymer component that is a polymerized unsaturated monomer, optionally copolymerized with a vinyl-aromatic monomer, and
- (b) a halogenated hydrocarbon wax component;
- the polymer component being grafted to the halogenated hydrocarbon wax component, the wax-polymer additive having a number average molecular weight of about 1,000 to about 100,000.
A method for making a composition comprising:
- mixing:
- a rubber elastomer comprising a polymerized unsaturated monomer and optionally a polymerized vinyl-aromatic monomer, the elastomer having a number average molecular weight of about 100,000 to about 1,000,000;
- a filler in an amount of about 5 to about 200 phr, the filler comprising carbon black, silica, or both;
- a wax-polymer additive that includes:
- (a) a polymer component that is a polymerized unsaturated monomer, optionally copolymerized with a vinyl-aromatic monomer, and
- (b) a halogenated hydrocarbon wax component,
- the polymer component grafted to the halogenated hydrocarbon wax component, the wax-polymer additive having a number average molecular weight of about 1,000 to about 100,000;
- and
- curing the composition.
A coated silica compound comprising:
- silica coated with a wax-polymer compound, the wax-polymer compound comprising:
- (a) a polymer component that is a polymerized unsaturated monomer, optionally copolymerized with a vinyl-aromatic monomer, and
- (b) a halogenated hydrocarbon wax component;
- the polymer component grafted to the halogenated hydrocarbon wax component, the wax-polymer compound having a number average molecular weight of about 1,000 to about 100,000.
Dependencies are inferred from the claim text.