| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems in which: an aging prevention agent is prone to migration due to high molecular polarity and causes deterioration of a tire appearance in long-term use; particularly, use of a phenylene diamine-based aging prevention agent makes the drawback significant; whereas, a tire rubber composition comprises a softener for improved workability but it reduces hardness; and an increased content of carbon black causes, therefore, deterioration of crack resistance.SOLUTION: The above described problem is solved by a rubber composition by blending 100 pts.mass of a diene rubber containing a butadiene rubber of 50 pts.mass, 5.0 pts.mass or less of a phenylene diamine-based aging prevention agent and 0.5 to 30 pts.ass of a styrenated phenol compound mainly containing distyrenated phenol or tristyrenated phenol.SELECTED DRAWING: None |
