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Temperature Range

Standard NBR Low Temperature Rating: -35°C/-31°F
Standard NBR High Temperature Rating: 110°C/ 230°F

Special Compound Low Temperature Rating: -40°C/-40°F
Special Compound High Temperature Rating: 150°C/300°F

Acrylonitrile Content

The acrylonitrile (ACN) content of the polymer chains can be varied from 18% to 50%. Lower ACN content gives better low temperature properties but poorer fuels and polar lubricants. Higher ACN content gives poorer low temperature properties but improved fuels and polar lubricants resistance. Standard NBRs typically have 34% ACN content.

Cure system - Sulfur-Cured vs. Peroxide-Cured

Standard Nitriles are usually sulfur-cured. Sulfur-cured compounds offer better low temperature properties but are more prone to hardening with high temperatures. Peroxide-cured nitriles have better heat resistance and lower compression sets but are more expensive and are more difficult to process.

Performs Well In...

  • Petroleum based oils and fuels
  • Aliphatic hydrocarbons
  • Vegetable oils
  • Silicone oils and greases
  • Ethylene glycol
  • Dilute acids
  • Water to below 100°C
  • Much more with the variations of compounds

Does Not Perform Well In...

  • Aromatic hydrocarbons
  • Automotive Brake Fluid
  • Chlorinated Hydrocarbons
  • Ketones
  • Ethers
  • Phosphate ester hydraulic Fluids
  • Strong Acids
  • Ozone/weathering/sunlight

Available Compounds