Tyre tread comprising an emulsion styrene/butadiene copolymer

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 1/00 (2006.01) C08F 2/24 (2006.01) C08F 236/10 (2006.01) C08K 3/00 (2006.01) C08K 3/04 (2006.01) C08L 9/08 (2006.01)

Patent

CA 2368002

The invention concerns a tyre tread comprising a crosslinkable rubber composition comprising at least a styrene and a butadiene copolymer prepared in emulsion, and a method for improving wear resistance of such a tyre tread. The invention concerns a tyre tread including for the major part black carbon as reinforcing filler. The inventive tyre tread includes at least a crosslinkable rubber composition comprising at least a styrene and butadiene elastomeric copolymer prepared in emulsion and a reinforcing filler comprising as major constituent carbon black, said carbon black being present in said composition in an amount not less than 55 parts per hundred parts of said or each polymeric elastomer. Said composition is characterised in that each or said copolymer comprises an emulsifier in an amount varying substantially between 1 and 3.5 parts per hundred of said or each elastomeric copolymer.

La présente invention concerne une bande de roulement de pneumatique comportant une composition de caoutchouc réticulable qui comprend au moins un copolymère de styrène et de butadiène préparé en émulsion, et un procédé pour améliorer la résistance à l'usure d'une telle bande de roulement. L'invention s'applique à une bande de roulement comportant majoritairement du noir de carbone à titre de charge renforçante. Une bande de roulement de pneumatique selon l'invention comporte une composition de caoutchouc réticulable qui comprend, d'une part, au moins un copolymère élastomère de styrène et de butadiène préparé en émulsion et, d'autre part, une charge renforçante comprenant à titre majoritaire du noir de carbone, ledit noir étant présent dans ladite composition selon une quantité égale ou supérieure à 55 pce. Cette composition est telle que ledit ou chaque copolymère comprend un émulsifiant selon une quantité variant sensiblement de 1 à 3,5 pce (pce: parties en poids pour cent parties dudit ou de chaque copolymère élastomère).

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