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CARBOXYLATED NITRILE

DESCRIPTION
Carboxylated Nitrile, or XNBR, is produced by adding a carboxylic acid side group to nitrile rubber, thereby adding more crosslinking sites than traditional NBR. As a result, solvent swell and abrasion resistance are significantly improved, as well as modulus, tensile strength and tear resistance. Accordingly, XNBR is frequently specified in dynamic applications such as rod seals or wipers.  Water resistance, resilience and some low temperature properties are somewhat diminished.
COMPOSITION
Medium density terpolymer of acrylonitrile, butadiene, and a diene monomer containg carboxylic acid.

PHYSICAL PROPERTIES* Excellent Good Fair Poor
Abrasion resistance      
Compression Set      
Elongation      
Flame resistance      
Gas permeability      
Low temperature flexibility      
Tear resistance      
Tensile strength      


CHEMICAL RESISTANCE* Excellent Good Fair Poor
Dilute acids and bases      
Esters      
LP Gas      
Oxidation      
Petroleum oils and fuels      
Silicone Fluids      
Solvents      
Steam      
Water      
Weather      

OPERATING TEMPERATURE
-10 to 250 °F

*Excellent, good, fair and poor are intended to serve as general guidelines only. Actual testing in the application environment is always recommended.