| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition for tires which prevents changes in appearance such as browning of the tire surface, etc., caused by cross- migration of amine antioxidants, without deteriorating the ozone resistance and the oxidation resistance. SOLUTION: A rubber composition is prepared by mixing at least one rubber chosen from the group consisting of natural rubbers and diene synthetic rubbers with an amine aging inhibitor. Here, against 100 pts.wt. the above-mentioned rubber, from 0.5 to 10 pts.wt. porous carbon black is blended. A carbon black wherein the DBP oil adsorption is 300 cm<3> /100 g or larger or a ketchen black is used as the porous carbon black. |
