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CR - Polychloroprene (CR; aka Neoprene)

Clwyd reference CR
ASTM classification CR
Polychloroprene (CR; aka Neoprene) has good all-round properties, resists degradation from sun, ozone and weather. Typical applications include wetsuits and professional diving suits, gloves, refrigeration seals, gaskets, hoses and car fan belts.neoprene
Typical applications
Wetsuits and professional diving suits, gloves, refrigeration seals, gaskets, hoses and car fan belts.
Advantages
  • Good all-round properties
  • Resists degradation from sun, ozone and weather
  • Performs well in contact with oils and many chemicals
  • Remains useful over a wide temperature range
  • Displays outstanding physical toughness
  • Resists burning inherently better than exclusively hydrocarbon rubbers
  • Outstanding resistance to damage caused by flexing and twisting
Disadvantages
  • Attacked by strong oxidizing acids, esters, ketones, chlorinated, aromatic and nitro hydrocarbons
  • Limited flexibility at low temperatures
Available hardness range (Shore A) 35 - 95
Upper continuous service temp. 100°C
Min. temp. for sealing applications -40°C
Minimum non-brittle  temp.  -50°C
Tensile strength (up to) 23 MPa
Elongation at break (up to) 450%
Price Bracket Very low
ASTM 1 Oil Excellent
ASTM 2 Oil Good
ASTM 3 Oil Good
Kerosene Good
Liquid B None
Liquid 101 None
Phosphate ester None
Ketone Average
Toluene None
Iso-octane Average
Methanol Excellent
Acid (weak) Good
Acid (strong) None
Base (weak) Good
Base (strong) Average
Hydrogen sulphide Average
Steam Average
Ozone Good
Radiation Good

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