| 摘要 |
PROBLEM TO BE SOLVED: To obtain a rubber composition suitable for a tread rubber for a large-scale tire of a track, a bus or the like, and having both abrasion resistance and low heat build-up. SOLUTION: This rubber composition is obtained by compounding 40-60 pts.wt. carbon black satisfying the following conditions (1) to (5), and 0.5-5 pts.wt. aliphatic amine and/or fatty acid salt with 100 pts.wt. dienic rubber: (1) having 100-120 cm3/100 g compression DBP; (2) having 120-160 m2/g specific surface area measured by nitrogen adsorption (N2SA); (3) having 1.0-1.2 ratio N2SA/IA of the specific surface area measured by nitrogen adsorption (N2SA) to iodine adsorption (IA); (4) having 60-90 m Stokes mode size (Dst); (5) having 40-60 nm half value width (ΔDst).
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