| 摘要 |
PURPOSE: Provided is a support ring rubber composition of a support ring type run-flat tire, which has high acid-resistance, heat-resistance, ozone-resistance, and hardness and is good for injection molding. CONSTITUTION: The support ring rubber composition contains 100phr of a raw rubber, 50-350phr of clay, 50-350phr of light calcium carbonate, 4-6phr of zinc oxide, 55-70phr of paraffin oil, 0.5-2.0phr of stearic acid, 6-9phr of titanium oxide, 1-2phr of polyethylene glycol, and 0.32-1.83phr of TMTD, wherein the raw rubber is EPDM rubber containing 65-75wt% of ethylene and 5-6wt% of diene. |
