CR - Polychloroprene (CR; aka Neoprene)

Clwyd referenceCR
ASTM classificationCR
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 BracketVery low
ASTM 1 OilExcellent
ASTM 2 OilGood
ASTM 3 OilGood
KeroseneGood
Liquid BNone
Liquid 101None
Phosphate esterNone
KetoneAverage
TolueneNone
Iso-octaneAverage
MethanolExcellent
Acid (weak)Good
Acid (strong)None
Base (weak)Good
Base (strong)Average
Hydrogen sulphideAverage
SteamAverage
OzoneGood
RadiationGood
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