Ethlylene Propylene Diene Monomer (EPDM) is a copolymer of ethylene and propylene and a smaller amount of a diene monomer which forms chemically unsaturated ethylene groups pendant from the main saturated chain. These facilitate cross-linking reactions which do not affect the integrity of the polymer backbone.
- EPDM has excellent heat, ozone and chemical resistance.
- Physical properties are good and resistance to polar fluids is generally good.
- Low temperature resistance is excellent and EPDM can be compounded to give excellent electrical resistance.
- EPDM is not suitable for exposure to petroleum based fluids and di-ester lubricants.
- Typical applications include accumulator bladders, cable connectors and insulators, diaphragms, gaskets, hoses and seals.
- Potable water (WRAS) grades are available as well as ‘Food Quality’ mixes suitable for the food and pharmaceutical industries.
- Typical working temperature range: – 45°C to +125°C, up to 150°C for peroxide cured EPDM.