NITRILE, Hydrogenated (HNBR)Trade Names(s):
ASTM D1418 Designation: HNBR ASTM D2000/SAE J200 Type, Class: DH Apple Compound Designation: ZT Standard Color: Black Description: HNBR is the product of the hydrogenation of Nitrile, resulting in varying degrees of saturation of the polymeric chain, with accompanying varying degrees of enhanced physical strength and chemical resistance properties. Key Use(s): ALL oil resistant applications, including exposure to such oil additives as detergents, anti-oxidants and anti-wear agents. Exposure to oil soured with metal sludge. Seals for oil well applications. Seals for automotive fuel handling systems. Seals for general industrial usage. Temperature Range: Standard Compound: -40° to +300°F. (Dry Heat Only) Hardness (Shore A): 50 to 90 Features: Compounds can be formulated for service temperature ranging from -85°F to +350°F. Like Nitrile, increasing acrylonitrile content improves oil resistance at a cost of reduced low temperature performance. Like Nitrile, HNBR is not recommended for exposure to ethers, esters, ketones, or chlorinated hydrocarbons. Limitations: As the degree of hydrogenation increases, with improved heat resistance, comes HNBR's tendency to cold flow or "creep". Increased hydrogenation further brings decreased elasticity at low temperatures. |
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