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.
|Medium density terpolymer of acrylonitrile, butadiene, and a diene monomer containg carboxylic acid.|
|Low temperature flexibility||•|
|Dilute acids and bases||•|
|Petroleum oils and fuels||•|
|-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.