Rubber composition
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsJosé-Carlos ARAUJO DA SILVA, Aurore CROCHET, Frédéric LEMERLE
Life of this patent
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Abstract
A rubber composition based at least on natural rubber, on a copolymer of ethylene and of a 1,3-diene, on a carbon black and on a crosslinking system is provided. The carbon black content ranges from 20 phr to 40 phr, the volume fraction of carbon black ranges from 8% to 15%, the copolymer content ranges from 20 phr to less than 50 phr, the natural rubber content is greater than 50 phr, and the copolymer contains more than 50 mol % of ethylene. Such a composition exhibits an improved compromise between the properties of cohesion, stiffness, hysteresis and resistance to ozone. Such a composition is preferentially used in a tire sidewall.
Claims18
A rubber composition based at least on natural rubber, on a copolymer of ethylene and of a 1,3-diene, on a carbon black and on a crosslinking system,
- the ethylene units in the copolymer representing more than 50 mol % of the monomer units of the copolymer,
- the carbon black content in the rubber composition ranging from 20 phr to 40 phr,
- the volume fraction of carbon black in the rubber composition ranging from 8% to 15%,
- the copolymer content in the rubber composition ranging from 20 phr to less than 50 phr,
- the natural rubber content in the rubber composition being greater than 50 phr.
Dependencies are inferred from the claim text.