HNBR

The hydrogenation process of NBR elastomers provide excellent heat and ozone resistance. Peroxide cured HNBR’s have the best compression set and heat resistance, and high-nitrile (ACN) HNBR elastomers have better resistance to mineral oils. HNBR’s combine best resistance and low temperature flexibility, although they are more expensive than NBR’s. HNBR’s are useful where resistance is required to ozone and weather, ageing in hot air and industrial lubricants, hot water and steam to 150°C, amine based corrosion inhibitors and sour gas (H2S), and high-energy radiation. HNBR’s fill the gap between NBR’s and FKM’s in many areas of application where resistance to heat and aggressive media are required simultaneously, and may therefore provide a lower cost alternative to FKM elastomers.