CO/ECO (epichlorohydrin rubber, hydrin)

This is a synthetic rubber, obtained by polymerization of epichlorohydrin (type CO), by copolymerization of epichlorhydrin and ethylene oxide (ECO) or by polymerization of epichlorhydrin, ethylene and diene (type ether). It is very resistant to mineral oils, changing weather conditions and ozone. Vulcanization of this type of rubber requires a longer time and it usually needs tempering.

Usage:

gaskets, membranes, soft pipes, roller coverings.

Advantages:

  • high resistance to mineral oils, grease, fuel, ozone, oxygen, high and low temperatures,
  • low gas permeability.

Disadvantages:

  • does not bind with metal,
  • not resistant to alcohol, esters, ketones,
  • poor rebound resilience,
  • gets permanently deformed at low temperatures.

Temperature resistance: from – 35 °C to 130 °C.

Hardness: 40 to 90 Shore A.