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    • 2. 发明授权
    • Pneumatic tire including cap tread portion
    • 气动轮胎,包括胎冠部分
    • US5851321A
    • 1998-12-22
    • US584419
    • 1996-01-11
    • Shingo MidorikawaKinya KawakamiEri Miura
    • Shingo MidorikawaKinya KawakamiEri Miura
    • B60C11/00B60C1/00C08K3/04C08L9/00
    • B60C1/0016
    • A pneumatic tire in which the cap tread portion is composed of a rubber composition comprising (i) 100 parts by weight of a diene rubber having a glass transition temperature (Tg) of not more than -45.degree. C. and (ii) not more than 65 parts by weight of carbon black having a nitrogen specific surface area (N.sub.2 SA) of not less than 140 m.sup.2 /g, a DBP oil absorption of not less than 120 ml/100 g, a .DELTA.DBP of not less than 30 ml/100 g, and a half value (.DELTA.Dst) of distribution of aggregates, measured by a centrifugal precipitation method, of not more than 50 m.mu., or a pneumatic tire in which a cap tread portion is composed of a rubber composition comprising (A) 100 parts by weight of a rubber component mainly comprising natural rubber and polybutadiene rubber and having a hardness at 0.degree. C. of not more than 60 and (B) (i) carbon black having a nitrogen specific surface area (N.sub.2 SA) of not less than 120 m.sup.2 /g and a 24M4DBP of not less than 90 ml/100 g and (ii) a silica in an amount of 5 to 40 parts by weight, with the total weight of the carbon black and silica being not more than 60 parts by weight.
    • 一种充气轮胎,其中所述胎冠部分由橡胶组合物构成,所述橡胶组合物包含(i)100重量份的玻璃化转变温度(Tg)不大于-45℃的二烯橡胶和(ii)不超过 65重量份的具有不小于140m 2 / g的氮比表面积(N2SA)的碳黑,DBP吸油量不小于120ml / 100g,DELTA DBP不小于30ml / 100g,通过离心沉淀法测定的聚集体分布的一半值(DELTA Dst)不大于50μm,或胎面部由橡胶组合物构成的充气轮胎,所述橡胶组合物包含(A )100重量份主要包含天然橡胶和聚丁二烯橡胶并且硬度在0℃以下不大于60的橡胶组分和(B)(i)具有氮比表面积(N2SA)的炭黑不是 小于120m2 / g和不小于90ml / 100g的24M4DBP,和(ii)量为5的二氧化硅 至40重量份,碳黑和二氧化硅的总重量不超过60重量份。