Because the polymer molecular side chain contains β-nitrileethyl or γ-nitrilepropyl strong polar groups, the inter-molecular force is greatly increased, and the oil and solvent resistance are improved. At the same time, due to the introduction of a certain amount of nitrile alkyl groups, the regularity of the polymer structure is destroyed, and the cold resistance is also greatly improved. The type and content of nitrile alkyl groups have a great impact on performance. For example, silicone rubber containing 7.5 mol% γ-nitrilepropyl has similar low temperature performance to low phenyl silicone rubber (its glass transition temperature is -114.5 ° C). Oil resistance is better than phenyl silicone rubber. As the content of γ-nitrilepropyl increases to 33-50 mol%, cold resistance decreases and oil resistance improves. Using β-nitrileethyl instead of γ-nitrilepropyl can improve the heat resistance of nitrile silicone rubber, and can withstand hot air aging at 250 ° C.

The main advantage of nitrile silicone rubber is that it has excellent oil and bath resistance, and can maintain elasticity in the range of -60 to 180 ° C. Therefore, it can be made into oil resistant rubber products for the aviation industry, automobile industry and petroleum industry; It can be used as the environmental sealant and fuel tank sealant of high-performance aircraft, and can maintain the seal at -54 ° C to 200 ° C or more. Nitrile silicone rubber can be processed with ordinary equipment.