Patent ID: 8960247
Filing Date: 2015-02-24
Classification: B60C,C08K,C08L

Abstract:
1. A pneumatic tire comprising a tread portion having a cap rubber and a base rubber, characterized in that: a rubber composition comprising not less than 30 parts by mass of carbon black and not less than 2 parts by mass of silica based on 100 parts by mass of a rubber component but not comprising a silane coupling agent is used in the base rubber, the rubber composition used in the base rubber further comprises 0.1-5 parts by mass of a hydrazide compound and 0.1-5 parts by mass of a compound (Z) having in its molecule at least one reactive group a for the rubber component and two or more adsorption groups b for the silica based on 100 parts by mass of the rubber component, the base rubber has a tensile stress at 300% elongation (M the carbon black has a nitrogen adsorption specific surface area (N