申请人:Bridgestone Corporation
公开号:EP0216588A2
公开(公告)日:1987-04-01
A pneumatic tire having a good all-weather running performance utilizes in the tire tread a vulcanized rubber composition containing 2-30 parts by weight of a low-temperature ester type softener, based on 100 parts by weight of a rubber blend of 10-90 parts by weight of at least one diene rubber having a glass transition temperature (Tg) of not more than -65°C and 90-10 parts by weight of at least one diene rubber having a Tg of not less than -55°C, the vulcanized rubber having an elastic modulus of not more than 50 kg/cm² at -20°C under elongation of 100% and a loss tangent (tan δ) of not less than 0.3. Further, in order to improve the brakability on wet roads, a predetermined amount of butyl rubber or halogenated butyl rubber can be compounded with the above rubber blend.
一种具有良好全天候行驶性能的充气轮胎在轮胎胎面中使用硫化橡胶组合物,该组合物含有 2-30 份(按重量计)低温酯类软化剂、以 100 份(重量)的橡胶混合物为基础,其中 10-90 份(重量)的至少一种二烯橡胶的玻璃化转变温度(Tg)不高于-65°C,90-10 份(重量)的至少一种二烯橡胶的玻璃化转变温度(Tg)不低于-55°C,硫化橡胶在-20°C 下伸长率为 100%时的弹性模量不高于 50 kg/cm²,损耗正切(tan δ)不小于 0。3.此外,为了提高在潮湿路面上的制动性,可将预定量的丁基橡胶或卤化丁基橡胶与上述橡胶混合物复合。