HNBR – Hydrogenated Nitrile Rubber

Hydrogenated Nitrile Rubber (HNBR) properties depend upon the acrylonitrile content and the degree of hydrogenation of the butadiene copolymer.

  • They have rather better oil and chemical resistance than Nitrile Rubber and can withstand much higher temperatures.
  • HNBR has excellent resistance to sour oil and gas, steam, hot water and ozone.
  • Physical properties (e.g. tensile and tear strength, elongation, abrasion resistance, compression set, etc.) are also excellent and compounds exhibit good dynamic behaviour at elevated temperatures.
  • Like EPDM, HNBR can either be cured with sulphur or peroxide, depending upon which properties are the most important.
  • Components in HNBR offer an excellent range of performance at a cost between Nitrile rubber and Fluoroelastomers.
  • Limitations include poor electrical properties, poor flame resistance and attack by aromatic oils and polar organic solvents.
  • Typical applications include accumulator bladders, diaphragms, gaskets and seals, especially for the oil and gas industries.
  • Typical working temperature range: -25°C to +175°C