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Chlorosulfonated Polyethylene (CSM)/ Hypalon
hlorosulfonated polyethylene or CSM is a synthetic rubber based on polyethylene. This rubber is a material with Neoprene Polychloroprene plus other qualities. The CSM rubber is suitable for continuous use up to about 130 degree celcius. It is also suitable for intermittent use up to some 30 degree celcius above this. Chlorosulfonated polyethylene is used in a variety of industrial and automotive applications that require high performance.

Hypalon
Hypalon® is the trade mark of CSM. Hypalon® has always demonstrated durability in harsh environments. This type of rubber is known to be used in applications that require high performance and resistance to chemicals, temperature extremes, and ultraviolet light. This type of chlorosulfonated polyethylene is a product of DuPont Performance Elastomers, a subsidiary of DuPont. However, it is also manufactured by other manufacturers as well.

Properties of Hypalon or Chlorosulfonated polyethylene (CSM)
  • This rubber has excellent resistance to oxygen, ozone and most chemicals, water.
  • It has poor fuel resistance.
  • It also has poor compression set resistance which limits its utility in dynamic sealing applications.
  • It also has poor compression set resistance which limits its usefulness in dynamic sealing applications.
  • It is resistant to weather.
  • It is also resistant to abrasion.
Uses of Chlorosulfonated polyethylene
CSM is used in a number of applications. Variety of products are made using CSM. Some of the popular uses and applications of Hypalon or chlorosulfonated polyethylene (CSM) are as follows:
  • Adhesives
  • Insulation
  • Shoe soles
  • Automotive components like high-temperature timing belts, power steering
  • Coatings
  • Flexible tubes
  • Seals
  • Flexible magnetic binders
  • Industrial products such as hose, rolls, seals, gaskets, diaphragms and lining for chemical processing equipment
  • Jacketing and insulation for wire and cable
  • Liners and covers for portable water reservoirs
  • Variety of protective and decorative coatings