This invention discloses a tire having crack resistant sidewalls which include a micronized rubber powder. The tire comprises a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, and wherein the sidewalls are comprised of 20 phr to 80 phr of natural rubber, 20 phr to 80 phr of polybutadiene rubber, and 3% over batch weight to 20% over batch weight of micronized rubber powder, wherein the micronized rubber powder has a particle size which is within the range of 40 Mesh to 300 Mesh. The tire may comprise a tread which includes at least one circumferential groove which separates circumferential ribs, each groove having a first and second side and a base which is situated between the said sides. The tire may comprise a carcass ply which is situated radially inward from the tread. Finally the sidewalls may be comprised of EPDM rubber.
Tire having crack resistant sidewalls
2016-12-14
Patent
Electronic Resource
English
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |