| 摘要 |
PURPOSE: An EPDM rubber composition is provided to have mechanical properties which are the same as natural rubber material, to improve heat resistance and fatigue resistance, such that the composition can be applied to an engine mount which requires high heat resistance and high durability. CONSTITUTION: An EPDM rubber composition comprises: a first EPDM rubber of which weight average molecular weight is 300,000-500,000 g/mol, the composition ratio of ethylene is 40-70 weight%, and the contents of unconjugated diene is 4-6 weight%; a second EPDM rubber of which weight average molecular weight is 400,000-600,000 g/mol, the composition ratio of ethylene is 50-70 weight%, and the contents of unconjugated diene is 3-5 weight%; a vulcanizer; an accelerator; and a filler. The weight ratio of the first EPDM rubber and the second EPDM rubber is 6-2:4-8. |
