C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 3/36 (2006.01) B60C 1/00 (2006.01) C08L 9/00 (2006.01) C08L 9/04 (2006.01) C08L 9/06 (2006.01)
Patent
CA 2417681
The invention concerns a tyre running tread consisting, at least partly, of a rubber composition based on at least: (i) a diene elastomer; (ii) more than 50 parts by weight for 100 elastomer parts (pce) of an inorganic filler as reinforcing filler; (iii) between 2 and 15 pce of a coupling agent (inorganic filler/diene elastomer); (iv) between 1 and 10 pce of a methylene acceptor; and (v) between 0.5 and 5 pce of a methylene donor. Said running tread has, after mechanical breaking in of the tyre whereto it is destined (auto-accommodation), a rigidity gradient radially increasing from the surface inwards of the running tread. The invention also concerns the use of such a running tread for making or retreading tyres. The invention further concerns tyres comprising said running tread, in particular, for snow or ice (winter tyres).
Bande de roulement de pneumatique formée, au moins en partie, d'une composition de caoutchouc à base d'au moins: -(i) un élastomère diénique; - (ii) plus de 50 pce d'une charge inorganique à titre de charge renforçante; -(iii) entre 2 et 15 pce d'un agent de couplage (charge inorganique/élastomère diénique); -(iv) entre 1 et 10 pce d'un accepteur de méthylène, et -(v) entre 0,5 et 5 pce d'un donneur de méthylène. Cette bande de roulement présente, arpès un rodage mécanique du pneumatique auquel elle est destinée ("auto-accommodation"), un gradient de rigidité radialement croissant de la surface vers l'intérieur de la bande de roulement. Utilisation d'une telle bande de roulement pour la fabrication ou le rechapage de pneumatiques. Pneumatiques comportant une bande de roulement conforme à l'invention, en particulier du type neige ou glace (pneumatiques "hiver").
Michelin Recherche Et Technique S.a.
Robic
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