| 摘要 |
PURPOSE: Provided is a rubber composition which forms a uniform wax layer on rubber surface and shows improved ozone resistance even at low temperature, by comprising more low molecular carbon and less isomer than existing rubber composition. CONSTITUTION: The rubber composition comprises 0.5-4 phr of wax with respect to 100 phr of rubber material, so as to improve ozone resistance. The rubber material is a mixture of 10-40 phr of styrene butadiene, 20-40 phr of butadiene rubber, and 20-30 phr of natural rubber, or a mixture of 40-60 phr of natural rubber and 40-60 phr of butadiene rubber. The wax shows a carbon distribution having 22.0-36.0% of C20-C27, 58.0-72.0% of C28-C34, 1.0-10.0% of C35-42, 15.0-25.0% of microcrystalline, and 75.0-85.0% of paraffin. |
