Nitrile And Hydrogenated (H-nbr)

Nitrile and Hydrogenated (H-nbr)

Key Use: All oil
resistance application, including exposure to such oil additives as
detergents, anti-wear agents. Exposure to oil soured with metal sludge.
Seal for oil well applications. Seal for automobile fuel handling
systems. Seal for general industrial usage.Working Temperature Range: - 20 oF to + 275 oF. (Dry Heat Only).Features:
In the areas of heat resistance, tensile strength, abrasion resistance,
and oil additive resistance, H-NBR exhibits improved performance
characteristics over non-hydrogenated Nitrile, while showing about five
times strength sour gasoline and ozone resistance. Tensile strength at
77 oF has been increased from 2,900psi for Nitrile, to 4350 psi for H-NBR.Various
H-NBR compounds have been created with performance characteristics
rivaling those of other polymers, such as fluorocarbon, polyacrylate,
ethylene propylene and neoprene. H-NBR ozone and fuel resistance
compares favorably with Fluorocarbon. Its excellent heat and oil
resistance rivals that of polyacrylate. Its resistance to steam (to
347 oF) is close to that of ethylene propylene. Its high abrasion and
heat resistance enables. In most cases, the tensile strength of H-NBR
is unsurpassed.Limitation: Like
nitrite, increasing acrylonitrile content improves oil resistance at a
cost of reduced of hydrogenation increase, with improved heat
resistance comes H-NBRs tendency to cold flow or "creep". Increased
hydrogenation further brings decreased elasticity at low temperatures.Like Nitrite, H-NBR is not recommended for exposure to ethers, esters, ketones, or chlorinated hydrocarbons.