Rubber composition for tire treads

Details Rubber composition for tire treads Rubber composition for tire treads

C - Chemistry, Metallurgy

08

L

C08L 23/22 (2006.01) B60C 1/00 (2006.01) C08L 23/28 (2006.01)

Patent

CA 2364806

The object of the present invention is to provide a rubber composition for a tire tread particularly in a pneumatic tire characterized in that said rubber composition comprises a low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a low-gel, high molecular weight butyl rubber, or a low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol%, a molecular weight M W of greater than 240 kg/mol and a gel content of less than 1.2 wt.% and/or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer, in particular a halogenated, low-gel, high molecular weight butyl rubber, or a halogenated, low-gel, high molecular weight isoolefin multiolefin copolymer synthesized from isobutene, isoprene and optionally further monomers, with a multiolefin content of greater than 2.5 mol%, a molecular weight M W of greater than 240 kg/mol and a gel content of less than 1.2 wt.%, a process for the preparation of said rubber composition, and a tire tread comprising said rubber composition.

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