Rubber mixtures containing surface-modified cross-linked rubber gels
AssigneeBayer Aktiengesellschaft
InventorsWerner Obrecht, Thomas Scholl, Ulrich Eisele, Winfried Jeske
Life of this patent
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Abstract
The rubber mixtures containing modified rubber gels according to the invention prepared from at least one rubber gel modified with compounds containing sulphur and reactive towards C═C double bonds and at least one rubber containing double bonds are preferable suitable for the production of vulcanizates which have an unusually strong reinforcing action in rubber vulcanizates. The vulcanisates furthermore exhibit unusually low dynamic damping at relatively elevated temperatures. They are thus particularly suitable for the production of low rolling resistance motor vehicle tire treads.
Claims16
A rubber mixture comprising a reaction product of
- (A) about 1 to 50 wt. % of at least one surface-modified, cross-linked rubber gel which has been surface-modified after having been cross-linked with about 0.05 to 20 wt. % of at least one sulfur-containing compound which is reactive towards C═C double bonds, with
- (B) about 50 to 99 wt. % of at least one rubber compound containing double bonds, optionally, a filler, and optionally, a rubber auxiliary substance.
A rubber mixture comprising a reaction product of
- (A) about 1 to 50 wt. % of at least one surface-modified, cross-linked rubber gel, which has been surface-modified after having been cross-linked with about 0.05 to 20 wt. % of at least one sulfur-containing compound which is reactive towards C═C double bonds, wherein the at least one surface-modified, cross-linked rubber gel has a swelling index in toluene of 1 to 15, with
- (B) about 50 to 99 wt. % of at least one rubber compound containing double bonds, optionally, a filler, and optionally, a rubber auxiliary substance.
A rubber mixture comprising a reaction product of
- (A) about 1 to 50 wt. % of at least one surface-modified, cross-linked rubber gel having a particle size of 5 to 2000 nm which has been surface-modified after having been cross-linked with about 0.05 to 20 wt. % of at least one sulfur-containing compound which is reactive towards C═C double bonds, wherein the at least one surface-modified, cross-linked rubber gel has a particle size of 5 to 2000 nm, with
- (B) about 50 to 99 wt. % of at least one rubber compound containing double bonds, optionally, a filler, and optionally, a rubber auxiliary substance.
A rubber mixture comprising a reaction product of
- (A) about 1 to 50 wt. % of at least one surface-modified, cross-linked rubber gel which has been surface-modified after having been cross-linked with 0.05 to 20 wt. % of at least one sulfur-containing compound which is reactive towards C═C double bonds, wherein the at least one sulfur-containing compound which is reactive towards C═C double bonds is elemental sulfur, hydrogen sulphide, a mercapto compound, a dithiocarbamate, a polysulphide, a xanthogenate, a thiobenzothiazole, a dithiophosphoric acid, a salt thereof, or a mixture thereof, with
- (B) about 50 to 99 wt. % of at least one rubber compound containino double bonds, optionally, a filler, and optionally, a rubber auxiliary substance.
Dependencies are inferred from the claim text.