NBR, as well known as Acrylonitrile Butadiene Rubber, was first developed in 1941 in a project meant to find an oil resistant rubber. However, NBR’s oil resistance depends on the grade of acrylonitrile. The higher the grade of acrylonitrile the better is resistance to oil and fuel. However, as the grade of acrylonitrile increases, the endurance to low temperatures decreases. NBR has good abrasion resistance nonetheless its physical properties are moderate in comparison with the Natural Rubber.
There must be also considered that ozone and electrical properties are poor. Fireproof capabilities are also poor and decrease even more if used with some solvents (mostly polar).
|GENERAL PROPERTIES||min - max|
|Hardness ShA||30 - 90 ShA|
|Hardness IRHD||30 - 90 IRHD|
|Tensile Strength||8 - 20|
|Elongation at break||100% - 900%|
|Continuous Temperature||-20 C° - 115C°|
|Point Température||-20 C° - 120C°|
|Resistance to solvents|
|Resistance to acids|
Most common applications: fuel bladders, gaskets, o-rings & seals, bladders, diaphragms, etc.