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EPM Rubber – Ethylene Propylene Rubber

EPM Rubber – Ethylene Propylene Rubber

EPM rubber is produced by the coordination copolymerization of eylene and propylene. The percentage of this rubber is 55-60% ethylene and 40-45% propylene. There are no double bonds in the EPM molecule, therefore sulfur is not used in the vulcanization process. The appropriate properties are obtained in the peroxide vulcanization process. The EPM material itself is a synthetic elastomer product.

What does EPM stand for?

Ethylene-propylene rubber is known as EPM, but it is also described as EPR. Its variation is EPDM rubber. These include ethylene propylene polymers and ethylene propylene diene terpolymers. Double bonds are isolated in EPDM molecules.

EPM rubber application

EPM rubber is a very recognized material, mainly due to its properties. It is resistant to heat, it behaves stably in the case of work, where oxygen is present in the environment – it does not oxidize. It is resistant to ozone and thanks to the stable structure of the molecule, it remains undamaged in changing weather conditions. It is also valued for the color stability of the rubber. EPM is resistant to temperatures of 130 and 160 degrees Celsius, if previously cured with peroxides. It is resistant to tearing, abrasion and also shows adequate elasticity. It is non-conductive and can be used as an insulator.

Polymers of this rubber are used in the automotive industry as seals and insulations. It is also perfect for protecting and sealing radiators, garden hoses, roof tiles, technical rubber products. It is very common in the application of high voltage cable insulator. Thanks to the flexibility of the material, it will be useful where the work of cables is observed, for example in the mining industry.

Due to its resistance to mineral oils, EPM can also be used in the presence of engine oils. EPM gaskets are resistant to weather conditions, so they are also widely used in construction and in the conditions of operation of selected chemicals. It works well as a material for the production of acid-resistant hoses.

Chemical resistance of the EPM rubber compound

Like any rubber compound, the EPM compound has its own chemical resistance. And this is how it exhibits chemical resistance to:

  • acetone
  • ethyne C2H2
  • methanol
  • aniline
  • nitrogen
  • sodium nitrate
  • calcium nitrate
  • zinc chloride
  • sodium phosphate
  • hydrocyanic acid
  • acetic acid
  • vinegar
  • silicone oils
  • brine
  • salt water – sea water

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