Use of fullerene carbon in curable rubber compounds

Details Use of fullerene carbon in curable rubber compounds Use of fullerene carbon in curable rubber compounds

C - Chemistry, Metallurgy

08

L

C08L 9/00 (2006.01) C08K 3/04 (2006.01) C08L 7/00 (2006.01)

Patent

CA 2206280

This invention relates to curable rubber compositions containing a fullerene form of carbon which is used as a reinforcing agent in the rubber compositions, the fullerene form of carbon being used in place of at least a portion of, or in addition to, the normally used forms of carbon black reinforcement additives. The invention particularly relates to tires having treads composed of such rubber composition(s). The fullerenes may optionally have surface modifications such as partial or complete hydrogen or functional group substitution. The fullerene form of non-conventional carbon reinforcement of rubber composition(s) may exist as discrete particles, aggregates of particles and/or agglomerates. The carbon fullerene has a lower specific gravity than conventional carbon black, thereby allowing a reduced weight tire or other article made from the rubber compound(s) for comparable volumes of carbon black used.

L'invention porte sur des compositions de caoutchouc réticulable, renfermant du carbone sous forme de fullerène, utilisé comme renfort dans ces compositions; le fullerène est utilisé à la place d'au moins une partie ou en plus des additifs de renfort généralement employés sous forme de noir de carbone. L'invention porte notamment sur des pneus possédant des semelles constituées de ces compositions de caoutchouc. Les fullerènes peuvent être facultativement modifiés en surface, comme par substitution partielle ou complète par de l'hydrogène ou un groupe fonctionnel. Le renforcement non classique de compositions de caoutchouc en carbone sous forme de fullerène peut se présenter en particules discrètes, en agrégats de particules et (ou) en agglomérats. Le fullerène a une densité inférieure au noir de carbone classique, ce qui permet d'obtenir des pneus ou d'autres produits plus légers avec ces compositions de caoutchouc, comparativement à des volumes équivalents de noir de carbone.

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