A rubber composition containing carbon fibrils and a...

Details A rubber composition containing carbon fibrils and a... A rubber composition containing carbon fibrils and a...

C - Chemistry, Metallurgy

08

K

C08K 7/06 (2006.01) B60C 1/00 (2006.01) C08K 3/04 (2006.01) H01B 1/24 (2006.01)

Patent

CA 2171466

A rubber composition containing carbon fibrils in which 0.5 to 60parts by weight of carbon fibril material comprised primarily of an aggregate of fibrils having an average particle diameter of 0.05 to 50 µ in which fine, filiform carbon fibrils of 3.5 to 75 nm in diameter are intertwined with each other is mixed with 99.5 to 40 parts by weight of synthetic rubber and/or natural rubbher and a pneumatic tire in which the surface layer is provided with this rubber composition. Vulcanized rubber of high hardness, high strength, high wear resistance and conductivity can be obtained while processing capacity is maintained. In addition, the tines can be made ligther.

L'invention concerne une composition de caoutchouc contenant des fibrilles de carbone dans laquelle 0,5 à 60 parties en poids de la matière desdites fibrilles, constituée d'un agrégat de fibrilles présentant un diamètre particulaire moyen de 0,05 à 50 mu m, dans lequel des fibrilles de carbone fines et filiformes de 3,5 à 75 nm de diamètre sont entrelacées, sont mélangées avec 99,6 à 40 parties en poids de caoutchouc synthétique et/ou naturel. L'invention porte également sur un pneumatique dont la couche de surface comprend cette composition de caoutchouc. On peut ainsi obtenir un caoutchouc vulcanisé de dureté, de résistance, de résistance à l'usure et de conductivité élevées sans modifier la capacité de traitement. On peut, par ailleurs, réduire le poids des pneumatiques selon l'invention.

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