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