Preparation of reinforced elastomer, elastomer composite, and tire having component thereof
AssigneeThe Goodyear Tire & Rubber Company
InventorsSun-Lin Chen, Howard Allen Colvin
Life of this patent
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Abstract
This invention relates to the preparation of a silica reinforced elastomer via preparation of a silica-elastomer masterbatch as a composite of synthetic silica and an emulsion polymerization prepared synthetic elastomer. Such masterbatch is prepared by introducing such silica and a silane into a latex of the synthetic elastomer and recovering the composite thereof The invention further includes a rubber composition of at least two elastomers wherein at least one of said elastomers is such masterbatched composite. A tire having a component of such rubber composition, particularly a tire tread, is specifically contemplated.
Claims20
A method for preparing a composite comprised of at least one elastomer and a homogeneously dispersed silica reinforcement therein comprises, based upon parts by weight of an ingredient per 100 parts by weight rubber:
- (A) preparing a water dispersion of a composite formed by blending an aqueous colloidal silica slurry, rubber latex comprised of colloidal elastomer particles therein, and a pre-formed emulsion of oil and an organosilane by blending:
- (1) an aqueous suspension of a negatively charged colloidal silica aggregates which contains from about 10 to about 100 phr of silica aggregates therein,
- (2) an aqueous rubber latex which contains 100 phr of diene-based rubber colloidal particles therein, and
- (3) oil emulsion of an organosilane polysulfide having from 2 to 6, with an average of from 2 to 2.6 or from 3.5 to 4, sulfur atoms in its polysulfidic bridge, which contains from 0.4 to about 4, phr of said organosilane polysulfide therein, wherein said organosilane component of said organosilane polysulfide is reactive with silanol groups contained on the surface of said silica aggregates, and
- (B) recovering said water dispersed product by coagulation.
Dependencies are inferred from the claim text.