SIDEWALL SUPPORT FOR A RUNFLAT TIRE

摘要

Run-flat tires having a sidewall support that is manufactured from particular rubber composition. These compositions are based upon a cross-linkable elastomer composition having, per 100 parts by weight of rubber, a polybutadiene rubber having a Mooney viscosity of between 55 and 85 and a low-surface area, high-structure carbon black. An additional second rubber component may also be included in the elastomer composition. The low-surface area, high-structure carbon black may be characterized as having a nitrogen surface area of between 15 m2/g and 25 m2/g and a COAN of between 65 ml/100 g and 85 ml/100 g.

主权项

1. A run-flat tire having a sidewall support, the sidewall support manufactured from a rubber composition that is based upon a cross-linkable elastomer composition, the cross-linkable elastomer composition comprising, per 100 parts by weight of rubber (phr):
a polybutadiene rubber having a Mooney viscosity of between 55 and 85; a second rubber component; and a low-surface area, high-structure carbon black having a nitrogen surface area of between 15 m2/g and 25 m2/g and a COAN of between 65 ml/100 g and 85 ml/100 g.