| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for a tire, maintained and improved in mechanical properties while being lessened in tanδ (60°C) by being blended with carbon black controlled in colloidal properties.SOLUTION: A rubber composition for a tire contains 5 to 120 pts.wt. of carbon black blended with 100 pts.wt. of a diene rubber, wherein an aggregate of the carbon black has a mode diameter Dst of ≥145 nm in a mass distribution curve of the stokes diameter, a nitrogen absorption specific surface area NSA of 45 to 70 m/g, and a ratio NSA/IA of the nitrogen absorption specific surface area NSA to an iodine absorption amount IA (unit: mg/g) of 1.00 to 1.40. |
