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US 9,845,384 B2Granted
Rubber compound for tyre production
AssigneeBridgestone Corporation
InventorsGiancarlo Cossu, Gianluca Forte
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Abstract
A rubber compound for tyres comprising a cross-linkable unsaturated chain polymer base comprising, in turn, at least a rubber of synthetic origin, a silica-free filler at least partially comprising carbon black, a vulcanization system and a mercapto carboxylic acid.
Claims12
A rubber compound for tyres comprising a cross-linkable unsaturated chain polymer base comprising at least a rubber of synthetic origin, a silica-free filler at least partially comprising carbon black, and a vulcanization system;
- said compound being characterized in that it comprises a mercapto carboxylic acid, wherein said mercapto carboxylic acid has the —CO2H and —SH functional groups spaced apart by a chain consisting of 4 to 40 atom, said rubber compound being prepared by a method comprising a pre-treatment step wherein said rubber of synthetic origin and said carbon black are mixed in the presence of a mercapto carboxylic acids.
A method for the production of rubber compounds for the preparation of a tyre portion;
- said rubber compound comprising a cross-linkable unsaturated chain polymer base at least partially comprising a rubber of synthetic origin, a silica-free filler at least partially comprising carbon black, and a vulcanization system;
- said method being characterized in that it comprises a pretreatment step wherein said rubber of synthetic origin and said carbon black are mixed in the presence of a mercapto carboxylic acid.
Dependencies are inferred from the claim text.