| 摘要 |
PURPOSE: Provided is a bladder rubber composition having improved fatigue-resistance, which contains a carbon black having low coloring degree and broad particle size distribution. CONSTITUTION: The bladder rubber composition contains: 100pts.wt. of a raw rubber comprising 70-90pts.wt. of butyl rubber having an unsaturation degree of 1.2-1.8mol% and 10-30pts.wt. of butyl rubber having an unsaturation degree of 0.6-1.0mol%; about 10pts.wt. of neoprene rubber containing a chlorine group(-Cl); 40-80pts.wt. of the carbon black having an iodine adsorption value of 80-88g/kg, a DBP oil absorption amount of 90-110ml/100g, a nitrogen adsorption specific surface area of 65-75m2/g, and a coloring degree of 60-80%. |
