Rubber compositions with increased reinforcing filler dispersion
AssigneeBridgestone Corporation
InventorsWilliam L. Hergenrother, Anthony J. Ramic, James D. Ulmer
Life of this patent
Estimating the term…
Abstract
A polar surfactant, preferably organic, is disclosed to increase dispersion of reinforcing filler aggregates in rubber compositions. The surfactant acts on binders present in the reinforcing filler aggregates so that the surfactant associates with the water soluble binder on carbon black to increase carbon black dispersion. The polar surfactant has an hydrophilic-lipophilic balance value of about 3 to about 35. Rubber products using the composition and methods of making the composition are also disclosed.
Claims19
A vilcanizable elastomer composition comprising:
- a polymer;
- about 5 to about 100 parts by weight of reinforcing filler per 100 parts said polymer;
- about 0.5 to about 10 parts by weight of a polar surfactant per 100 parts of said polymer;
- about 0.5 to about 15 parts of cure agent per 100 parts of said polymer;
- and
- a water-soluble binder.
A vulcanizable elastomer composition produced by a process comprising the step of:
- mixing 100 parts by weight of a polymer, about 0.5 to about 10 parts by weight of a polar surfactant per 100 parts of the polymer, about 5 to about 100 parts by weight of a carbon-black per 100 parts of the polymer, where the carbon black filler is bound by a water-soluble binder, and about 0.5 to about 15 parts by weight of cure agents per 100 parts of the polymer.
A vulcanizate produced by a process comprising the steps of:
- mixing 100 parts by weight of a polymer, about 0.5 to about 10 parts by weight of a polar surfactant per 100 parts of the polymer, about 5 to about 100 parts by weight of a carbon-black per 100 parts of the polymer, where the carbon black filler is bound by a water-soluble binder, and about 0.5 to about 15 parts by weight of cure agents per 100 parts of the polymer;
- and
- curing the mixture.
A vulcanizate comprising:
- a rubber;
- about 5 to about 100 parts by weight of reinforcing filler per 100 parts of the cured rubber;
- about 0.5 to about 10 parts by weight of a polar surfactant per 100 parts of the cured rubber;
- and
- a water-soluble binder.
Dependencies are inferred from the claim text.