CR – Polychloroprene (Neoprene®)

Chloroprene Rubber (CR), widely known as Neoprene®, was one of the first oil resistant synthetic rubbers. It is a good general purpose rubber with an excellent balance of physical and chemical properties.

  • However, it has only moderate resistance to petroleum based oils and fuels.
  • It has better chemical, oil, ozone and heat resistance than natural rubber but a rather lower level of physical properties.
  • Chloroprene tends to slowly absorb water and its electrical properties are poor.
  • Its gas permeability is fairly low and flame resistance is excellent, chloroprene being one of the few rubbers that are self-extinguishing.
  • Gives excellent rubber-metal bonds and good resilience.
  • Certain grades of Neoprene may crystallise and harden during storage although they will thaw on heating.
  • Chloroprene is widely used because of its wide range of useful properties and reasonable price.
  • Typical applications include belting, coated fabrics, cable jackets, seals and gaiters.
  • Typical working temperature range: -35°C to +100°C

Neoprene® is a registered trademark of DuPont Performance Elastomers.