Ethylene-propylene compounds are prepared from ethylene and propylene (EPM) and usually a third monomer (EPDM). These compounds are used frequently to seal in brake systems, and for sealing hot water and steam. Ethylene propylene compounds have good resistance to mild acids, detergents, alkalis, silicone oils and greases, ketones, and alcohols. They are not recommended for applications with petroleum oils, mineral oil, di-ester lubricants, or fuel exposure.
Ethylene Propylene has gained wide seal industry acceptance for its excellent ozone and chemical resistance properties and is compatible with many polar fluids that adversely affect other elastomers.
EPDM compounds are typically developed with sulphur or peroxide cure system. Peroxide-cured compounds are suitable for higher temperature exposure and typically have improved compression set performance.
O-rings, rubber seals and custom moulded rubber components for:
Oil resistant applications
Oil well applications
Fuel systems, automotive, marine, and aircraft
General Industrial Use
excellent weather resistance
good low temperature flexibility
excellent chemical resistance
good heat resistance
- poor petroleum oil and solvent resistance
sulphur-cured and peroxide-cured compounds
third co monomer EPDM, copolymer ethylene and propylene EPM
acrylonitrile content (ACN) from 18% to 50%
peroxide vs. sulphur donor cure system
|General Description||Chemical Description||ISO/DIN 1629||Other Trade names & Abbreviations||ASTM D2000 Designations|
|Ethylene-Propylene||Ethylene propylene diene rubber||EPDM||EP, EPT, EPR||BA, CA, DA|
|Temperature Range (Dry Heat)||Low||High|
|Fahrenheit||- 60 °F||300 °F|
|Celsius||-51 °C||149 °C|