| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a particle size and a blending amount of carbon black are adjusted because a tire bead filler is required to have high hardness, but it is difficult to highly balance workability, hardness and temperature dependency.SOLUTION: A rubber composition contains 60-90 pts.mass of carbon black having a nitrogen adsorption specific area (NSA) of 25-85 m/g, and 1-20 pts.mass of a thermosetting resin, with respect to 100 pts.mass of a diene-based rubber containing 50-80 pts.mass of a natural rubber and 20-50 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 |
