RUBBER COMPOSITION FOR TIRE

摘要

PROBLEM TO BE SOLVED: To provide a rubber composition for a tire for improving low heat generation property and mechanical characteristics.SOLUTION: There is provided a rubber composition for a tire obtained by blending 30 to 80 pts.wt. of carbon black having a nitrogen adsorption specific surface area of 20 to less than 90 m/g and more than 0.8 pt.wt to less than 3 pts.wt. of a sulfur component in terms of pure sulfur based on 100 pts.wt. of a rubber component which is a rubber component composed of 40 wt.% or more of a natural rubber and/or an isoprene rubber, 30 to 100 wt.% of a masticated rubber masterbatch in which 0.3 to 5.0 wt.% of a compound having an amino group represented by the formula (i) is coexisted with 100 wt.% of a diene-based rubber optionally including a butadiene rubber and a total of 70 to 0 wt.% of a butadiene rubber, a natural rubber and an isoprene rubber and contains a total 30 to 70 wt.% of a natural rubber and an isoprene rubber and a total of 70 to 30 wt.% of a butadiene rubber.SELECTED DRAWING: None