nitrilebutadiene

Nitrile butadiene rubber, often abbreviated as NBR, is a synthetic rubber copolymer of acrylonitrile and butadiene. The properties of NBR depend on the acrylonitrile content, which can range from 18% to 50%. Higher acrylonitrile content leads to improved resistance to oils, fuels, and chemicals, but can reduce flexibility at low temperatures. NBR is known for its excellent resistance to petroleum-based oils, greases, and a wide range of solvents. It also offers good abrasion resistance, tear strength, and tensile strength.

NBR finds extensive use in industries where resistance to oils and fuels is critical. Common applications include automotive seals, gaskets, hoses, O-rings, and fuel lines. It is also used in the manufacturing of conveyor belts, protective gloves, and footwear. The material's ability to withstand moderate temperatures, typically from -40°C to 120°C, further broadens its applicability. While NBR exhibits good mechanical properties, it is susceptible to degradation from ozone, sunlight, and weathering. Blending NBR with other polymers or adding specific stabilizers can enhance its resistance to these environmental factors. Its cost-effectiveness compared to some specialty elastomers makes it a popular choice for many industrial applications.