| 摘要 |
A pneumatic tyre having a sidewall rubber, which has improved weatherability and flexing fatigue resistance and is not discoloured. The pneumatic tyre comprises a pair of bead cores (1), a toroidal carcass fixed by turning up both edges thereof around the bead core (11), a belt layer (3) arranged in the peripheral direction outside of the crown of the carcass, a tread (4) arranged outside of the belt layer (3), and a sidewall rubber (5) arranged outside of the carcass, wherein the sidewall rubber (5) has a two-layer structure comprising an inner layer rubber (6) adjacent to the carcass and an outer layer rubber (7) arranged outside thereof, and the outer layer rubber (7) comprises 40 to 90% by weight of at least one diene rubber selected from a group consisting of a natural rubber, an isoprene rubber, a styrene-butadiene rubber and a butadiene rubber, and 10 to 60% by weight of a rubber obtained by halogenating a copolymer of an iso-monooelfin having 4 to 7 carbon atoms and p-alkylstyrene, as a rubber component. <IMAGE> |
