| 摘要 |
The invention relates to a run flat safety support ring intended to be mounted on a wheel rim (12) inside a tire (14) equipping a vehicle for supporting the tire tread in case of loss of inflation pressure, the support ring (10) comprising a generally cylindrical crown (18) intended to come in contact with the interior of the tire tread in the event of the loss of inflation pressure, and leaving a clearance from the tire tread interior at normal pressure. The crown (18) comprises a self lubricating rubber composition, the self lubricating rubber composition comprising at least one rubber and from 1 to 50 phr of at least one additive selected from alcohols of formula I, esters of formula II, or amides of formula III
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ R 1 -OH€ƒ€ƒ€ƒ€ƒ€ƒ(I)
wherein R 1 and R 2 are independently selected from C 12 - C 36 alkyl, C 12 - C 36 alkenyl, or C 12 - C 36 alkadienyl. |
