Tread for a tire
AssigneeMichelin Recherche et Technique S.A.
InventorDidier Vasseur
Life of this patent
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Abstract
A tire tread and a tire comprising a tire tread, the tire tread having a rubber composition based on a diene elastomer; more than 50 phr of an inorganic filler as reinforcing filler; between 2 and 15 phr of an inorganic filler/diene elastomer coupling agent; between 1 and 10 phr of a methylene acceptor, and between 0.5 and 5 phr of a methylene donor. The tread may be characterized as having a radially increasing rigidity gradient from the surface towards the inside of the tread after mechanical run-in of the tread. In particular embodiments, the tread may be characterized as having a nominal secant modulus at 10% elongation is between 3 and 7 MPa at a radially outer surface of the tread and between 9 and 13 MPa at the most radially inside of the tread.
Claims20
A tire, the tire comprising a tread, the tread comprising:
- a rubber composition, the rubber composition based on:
- a diene elastomer;
- more than 50 phr of silica as an inorganic reinforcing filler;
- between 2 and 15 phr of an inorganic filler/diene elastomer coupling agent;
- between 1 and 10 phr of a methylene acceptor,
- between 0.5 and 5 phr of a methylene donor;
- and
- optionally carbon black, present in an amount less than 20% by weight relative to the quantity of total reinforcing filler, the quantity of total reinforcing filler being the sum of the silica and the carbon black, wherein the tread presents a radially increasing rigidity gradient from the surface towards the inside of the tread after mechanical run-in of the tread.
Dependencies are inferred from the claim text.