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US 9,751,992 B2Granted
Elastomeric composition having a very good dispersion of the filler in the elastomeric matrix
AssigneesCompagnie Generale Des Etablissements Michelin, Michelin Recherche et Technique S.A.
InventorsMarc Sevignon, Cécile Belin
Life of this patent
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Abstract
The invention relates to a rubber composition based on at least one diene elastomer, a reinforcing filler comprising at least carbon black having a CTAB specific surface of greater than or equal to 130 m2/g, a plasticizing oil and also a crosslinking system, the dispersion of the filler in the elastomeric matrix having a Z score of greater than or equal to 70.
Claims9
A process for the preparation of a rubber composition comprising the steps of:
- providing a dried coagulum comprising at least one diene elastomer and a reinforcing filler, the reinforcing filler comprising at least carbon black having a CTAB specific surface of greater than or equal to 130 m2/g;
- providing a plasticizing system consisting of a plasticizing oil selected from the group consisting of a polyolefinic oil, a paraffinic oil, a naphthenic oil, an aromatic oil, a mineral oil, or mixtures thereof;
- incorporating the dried coagulum and the plasticizing system in a mixer, and kneading everything thermomechanically until a maximum temperature of between 130° C. and 200° C. is reached,
- cooling the combined mixture to a temperature of less than 100° C.,
- subsequently incorporating a crosslinking system into the mixture,
- kneading everything up to a maximum temperature of less than 120° C., wherein the dispersion of the filler in the rubber composition has a Z score of 70 or greater.
3 more elements
Dependencies are inferred from the claim text.