NBR is a copolymer of butadiene and acrylonitrile. The characteristic is its excellent resistance to gasoline and fatty hydrocarbon oils, second only to polysulfide rubber, acrylic ester, and fluororubber, and superior to other general-purpose rubbers. Good heat resistance, air tightness, wear resistance, and water resistance, with strong adhesion. The disadvantages are poor cold and ozone resistance, low strength and elasticity, poor acid resistance, poor electrical insulation, and poor resistance to polar solvents. Temperature range for use: approximately -30 ℃ to+100 ℃. Mainly used for manufacturing various oil resistant products, such as rubber hoses, sealing products, etc. (Translated from Sohu. com)