CR
Chloroprene Rubber (CR)
Chloroprene was one of the first successful synthetic elastomers in 1931 made by Dupont, and the trade name is Neoprene. It is prepared by emulsion polymerization of chloroprene or 2-chlorobutadiene. CR is a multi-purposed elastomer which yields a balanced combination of properties. It has good resistance to sun, ozone, weather and performs well in contact with oils and many chemicals. It also displays outstanding physical toughness and good resistance to fire.
Cure system
Metal oxide cured
Standard CRs are metal oxides& organic accelerators.
Other Common Variations
- Chloroprene has been used in thousands of diverse environment, including automotive, wire and cable industries.
- CR is usually used in air condition system, especially old refrigerated media like R12 or R22 and lubricant with mineral oil.
General Information
ASTM D 1418 Designation
CR
Standard Color(s)
Black
ISO/DIN 1629 Designation
CR
Hardness Range
30-90 Shore A
ASTM D2000 / SAE J 200 Codes
BC, BE
Relative Cost
Low
Service Temperatures
Standard Low Temperature
-40°C / -40°F
Special Compound Low Temperature
-55C / -67°F
Standard High Temperature
125°C / 257°F
Special Compound High Temperature
135°C / 275°F
Performs Well In...
- Refrigerants
- Ammonia
- Water
- Silicone grease and oils
- High aniline point mineral oil
Doesn’t Perform Well In...
- Aromatic hydrocarbons
- Ketones
- Esters
- Ethers
- Strong oxidizing acids
- Chlorinated hydrocarbons