CR Neoprene (Polychloroprene Rubber)
cao su neoprene CR
Also known as: neoprene · chloroprene rubber · polychloroprene
CR Neoprene is a synthetic rubber with good weathering, ozone, and flame resistance, operating –40°C to +120°C — used for HVAC duct gaskets, marine seals, and refrigerant O-rings.
Technical Detail
CR (polychloroprene) was one of the first synthetic rubbers. The chlorine in the polymer chain gives moderate oil resistance (better than EPDM, worse than NBR), good flame retardancy, and excellent ozone and UV resistance. Key properties: moderate petroleum oil resistance, good refrigerant R-22/R-134a compatibility, flame retardant (self-extinguishing), good dynamic flex fatigue. Temperature: –40°C to +120°C. Poor compatibility with aromatic solvents, strong oxidising acids, and ketones. Primary applications: refrigeration and HVAC gaskets (including ammonia refrigeration at modest concentrations), marine hatch seals, automotive engine mounts, and fire-suppression system O-rings. Shore A hardness: 40–70, standard 60 Shore A for duct/flange seals.
Reference Standards
- ASTM D2000 BC/BE grade
- ISO 1629 CR
Related Terms
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- EPDM (Ethylene Propylene Diene Monomer) — EPDM is a synthetic rubber with outstanding resistance to water, steam, ozone, and UV, operating fro…
- Shore A Hardness (Durometer) — Shore A hardness (durometer) measures rubber stiffness on a 0–100 scale — standard O-ring compound i…