4、 Fluorosilicone rubber






Fluorosilicone rubber refers to γ - trifluoropylmethylpolysiloxane. Fluorosilicone rubber has excellent chemical resistance, solvent resistance and lubricating oil resistance, and its expansion rate in non-polar solvent is small, It has good cold resistance, thermal stability and fire resistance, so it can be used in aircraft, rocket, missile, space flight, petrochemical industry to contact with fuel oil and lubricating oil, such as rubber tube, gasket, sealing ring, fuel tank village, etc., and can also be used to manufacture corrosion-resistant clothes, gloves, coating materials, adhesives, etc.










5、 Nitrile silicone rubber






Due to the strong polar groups of β - cyanoethyl or γ - cyanopropyl in the polymer molecular side chain, the intermolecular force is greatly increased, and the oil resistance and solvent resistance are improved. At the same time, due to the introduction of a certain amount of cyanoalkyl, the regularity of the polymer structure is destroyed, and the cold resistance is greatly improved. The type and content of cyanoalkyl group have a great influence on the properties. For example, the silicone rubber containing 7.5G% γ - cyanopropyl group has a similar low temperature performance (its glass transition temperature is - 114.5 ℃), and its oil resistance is better than that of phenylsilicone rubber. With the increase of γ - nitrilpropyl content to 33-50g, the cold resistance decreased and the oil resistance improved. Using β - cyanoethyl instead of γ - cyanopropyl can improve the heat resistance of NBR, and can withstand 250 ℃ hot air aging.










The main advantage of NBR is that it has excellent performance of oil resistance and bath resistance agent, and can keep elasticity in the range of - 60 ~ 180 ℃. Therefore, it can be made into oil resistant rubber products for aviation industry, automobile industry and petroleum industry; it can also be used as environmental sealant and oil tank sealant for high-performance aircraft, and can keep sealing above - 54 ℃ to 200 ℃. Nitrile silicone rubber can be processed by ordinary equipment.










6、 Phenylene silicone rubber






The main characteristic of phenylene silicone rubber is its excellent radiation resistance. Its radiation resistance is 10-15 times of that of general methyl vinyl silicone rubber and 5-10 times of that of high phenyl silicone rubber. Therefore, it can be used in aerospace industry, atomic energy industry and nuclear reactor as cables, sheaths, washers and heat shrinkable tubes resistant to high energy radiation.