| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire insulation rubber which has high hardness and sufficient insulation workability for bundling and integrating bead wires having greatly different Young's modulus (deposition rate to wire of rubber is high and viscosity in insulation work is lowered), and has a high vulcanization rate to a certain extent.SOLUTION: A rubber composition contains 70-150 pts.mass of carbon black having a nitrogen adsorption specific area (NSA) of 40 m/g or less, 10-100 pts.mass of an inorganic filler having an NSA of 40 m/g or less, with respect to 100 pts.mass of a diene-based rubber containing 50-100 pts.mass of a natural rubber and 0-50 pts.mass of a styrene-butadiene copolymer rubber, and 0.1-5 mass% of a sulfide compound having a specific structure with respect to the carbon black.SELECTED DRAWING: None |
