Coupling system (white filler/diene elastomer) based on...

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/31 (2006.01) C08K 5/5398 (2006.01) C08K 5/54 (2006.01) C08K 5/548 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2338150

The invention concerns a coupling system (white filler/diene elastomer) for a rubber composition based on diene elastomer reinforced with a white filler, formed by combining a polysulphide alkoxysilane, a zinc dithiophosphate and a guanidine derivative. The invention also concerns a rubber composition useful for making tyres, comprising at least (i) a diene elastomer (ii) a white filler as reinforcing agent, (iii) a polysulphide alkoxysilane, (iv) a zinc dithiophosphate and (v) a guanidine derivative. The invention further concerns a method for preparing said rubber composition. Finally the composition concerns a tyre or semi-finshed product in particular a running tread for tyre comprising said rubber composition.

Système de couplage (charge blanche/élastomère diénique) pour composition de caoutchouc à base d'élastomère diénique renforcée par une charge blanche, constitué par l'association d'un alkoxysilane polysulfuré, d'un dithiophosphate de zinc et d'un dérivé guanidique. Composition de caoutchouc utilisable pour la fabrication de pneumatiques, comportant au moins (i) un élastomère diénique, (ii) une charge blanche à titre de charge renforçante, (iii) un alkoxysilane polysulfuré à titre d'agent de couplage (charge blanche/élastomère diénique) auquel sont associés (iv) un dithiophosphate de zinc et (v) un dérivé guanidique. Procédé pour préparer une telle composition de caoutchouc. Pneumatique ou produit semi-fini, notamment bande de roulement, pour pneumatique comportant une composition de caoutchouc conforme à l'invention.

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