| 摘要 |
PURPOSE: Provided is a carcass rubber composition for automobiles and light trucks, which can improve the productivity by lowering viscosity and can improve the endurance of tires. CONSTITUTION: The carcass rubber composition contains: 100phr of a two membered raw rubber comprising 60-80phr of a natural rubber and 20-40phr of a styrene butadiene rubber or a three membered raw rubber comprising 60-80phr of the natural rubber, 20-40phr of the styrene butadiene rubber, and about 20phr of a butadiene rubber; 40-62phr of a carbon black having a dibutyl phthalate absorption value of 70-125cc/100g and an iodine adsorption value of 30-85mg/g; 0.5-4phr of zinc salts containing 4-8% of zinc and comprising C14-C20 organic substances or calcium salts containing 3-8% of calcium and comprising C14-C20 organic substances; 0.5-1.5phr of an accelerator such as benzothiazyl sulfanamide or dibenzothiazyl disulfanamide. |
