| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for a base tread capable of improving low fuel consumption properties, fracture strength and workability in a good balance, and to provide a pneumatic tire using the same.SOLUTION: A rubber composition for a base tread contains a rubber component, silica and a compound represented by the formula (I), and has the content of a conjugated diene polymer having a constitutional unit based on a conjugated diene and a constitutional unit based on a compound represented by the formula (1) of 5 mass% or more in 100 mass% of the rubber component, the content of the silica of 5 to 150 pts.mass based on 100 pts.mass of the rubber component. In the formula (1), m represents the number of 1 to 3, Rrepresents a hydrocarbyl group having a polymerizable carbon-carbon double bond, A represents a substituted amino group, a plurality of As may be same or different if there are a plurality of As, Rrepresents a hydrocarbyl group, a substituted hydrocarbyl group or a substituted amino group, and a plurality of Rs may be same or different if there are a plurality of Rs. |
