A RUBBER COMPOSITION CONTAINING CARBON FIBRILS AND A PNEUMATIC TIRE

摘要

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 .mu. 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.