Rubber composition usable in the vulcanized state as a tire safety support and such a support

摘要

The present invention provides a rubber composition which when vulcanized may be used to form a safety support intended to be mounted on a wheel rim within a tire. The invention also is directed to such a support, capable of supporting a tread of the tire in the event of a drop in inflation pressure, and to a mounted assembly comprising this support. A rubber composition according to the invention comprises (phr: parts by weight per 100 parts of diene elastomer(s)): - natural rubber or synthetic polyisoprene in a quantity of greater than or equal to 60 phr, more than 60 phr of a reinforcing white filler, and from 3 to 8 phr of sulphur.