The present invention provides a rubber composition that comprises a rubber component containing a polybutadiene and a dienic rubber or an olefinic rubber immiscible with the polybutadiene, and a filler, in which the Mooney viscosity (ML1+4/100°C) of the polybutadiene referred to as ML(I), and the Mooney viscosity (ML1+4/100°C) of the dienic rubber or the olefinic rubber immiscible with the polybutadiene referred to as ML(II) are in a relation of ML(I) ≥ ML(II), a method for producing the rubber composition and a tire using the rubber composition. The rubber composition is excellent in fracture resistance and capable of attaining good workability not lowering the durability such as abrasion resistance and the like of tires, and can reduce the rolling resistance of tires.
本发明提供了一种橡胶组合物,该组合物包括含有聚
丁二烯和二元橡胶或与聚
丁二烯不相溶的烯烃橡胶的橡胶组分,以及填料,其中聚
丁二烯的门尼粘度(ML1+4/100°C)称为 ML(I),二元橡胶或与聚
丁二烯不相溶的烯烃橡胶的门尼粘度(ML1+4/100°C)称为 ML(II)、和与聚
丁二烯不相溶的二元橡胶或烯烃橡胶的门尼粘度(ML1+4/100°C)(称为 ML(II))的关系为 ML(I)≥ML(II)。该橡胶组合物具有优异的抗断裂性,能够获得良好的加工性,不会降低轮胎的耐磨性等耐用性,并能降低轮胎的滚动阻力。