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
ISO/DIN 1629 Designation: CR
ASTM D2000 / SAE J 200 Codes: BC, BE
Standard Color(s): Black
Hardness Range: 30 to 90 Shore A
Relative Cost: Low

Service Temperatures

Standard Low Temperature: -40°C / -40°F
Standard High Temperature: 100°C / 212°F
Special Compound Low Temperature: -55C / -67°F
Special Compound High Temperature: 125°C / 257°F

Performs Well In	Doesn't Perform Well In
• Refrigerants • Ammonia • Water • Silicone grease and oils • High aniline point mineral oil	• Aromatic hydrocarbons • Ketones • Esters • Ethers • Strong oxidizing acids • Chlorinated hydrocarbons

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