| 摘要 |
PROBLEM TO BE SOLVED: To relieve a fall of the inner pressure in a tire and the crack growth of the inner liner by the repeated flexion deformity with the tire running and to relieve the rolling resistance furthermore, in the pneumatic tire equipped with the inner liner. SOLUTION: In the pneumatic tire in which the inside of the carcass ply tire loaded across a pair of bead parts includes the inner liner, the inner liner consists of the first layer arranged inside the tire and the second layer arranged so as to come in contact with the rubber layer of the carcass ply. At least either of the first layer and the second layer is an isobutylene based block copolymer which consists of the polymeric block (A) made mainly of the isobutylene and a polymeric block (B) made mainly of the aromatic vinyl based compound, and at least one block is an elastomer composition containing the isobutylene based modified copolymer of a random copolymer containingβ-pinene. COPYRIGHT: (C)2012,JPO&INPIT |
