HNBR - modified form of NBR

What is hydrogenated nitrile rubber (HNBR)?

Hydrogenated nitrile rubber (HNBR, Hydrogenated Nitrile Butadiene Rubber) is a modified form of NBR in which the double bonds in the butadiene portion are saturated by hydrogenation. This structural change significantly improves the thermal stability, ozone and ageing resistance, while retaining the excellent oil and fuel resistance of NBR.

HNBR is therefore frequently used in applications where high temperatures, aggressive media and mechanical loads occur simultaneously. Its combination of robustness and media resistance makes it a valued material for demanding applications. Molded Rubber such as seals, diaphragms or bearing elements - but also for complex composite parts, whether as Metal-rubber composite part for force-transmitting assemblies, as Plastic-rubber composite part for lightweight optimised constructions or as a Fabric-reinforced composite part.

 

What are the properties of hydrogenated nitrile rubber (HNBR)?

  • Excellent resistance to Mineral oils, fuels, greases and many chemicals
  • High temperature resistance of approx. -40 °C until +150 °C
  • Excellent ozone, UV and Resistance to ageing without additional protective additives
  • Very high mechanical strength, abrasion and tear resistance
  • Low compression set for long-lasting sealing effect
  • Better low-temperature flexibility than many other high-performance rubbers in a comparable temperature range
  • Good resistance to hot water and steam (in special Compounds)

 

What areas of application & material combinations of hydrogenated nitrile rubber (HNBR) are there?

HNBR is often used for high-performanceSeals, O-rings, Sealing lips, Valves, hoses and various Rubber-Metal Composite Parts the high temperatures, Oiling or are exposed to aggressive media.

Typical applications can be found in automotive engineering (e.g. drive belts, fuel systems), in hydraulic and pneumatic systems, in the oil and gas industry and in machine components with high dynamic loads. In combination with fillers and plasticisers, HNBR can be used specifically in Degree of hardness, flexibility and media resistance.