① Ozone resistance is worse than CR and better than NR;
(2) The rubber is endowed with better physical and mechanical properties and wear resistance through reinforcement;
③ When the acrylonitrile content of NBR is 39%, the air tightness is equivalent to that of IIR rubber, and the air tightness is good;
④ Low temperature flexibility is average;
⑤ Excellent antistatic performance;
⑥ The plasticizing effect with polar lipid is better;
⑦ Good compatibility with polar substances, such as PVC, acid resin, nylon, etc.
⑥ The coating performance is not good, the self-adhesion is low, and the heat generated in the mixing process is large.
Excellent oil resistance
Nitrile rubber is one of the most representative rubbers, which has excellent comprehensive properties such as oil resistance, physical and mechanical properties and chemical resistance. Effective use of these characteristics can make it meet various purposes.
Among general rubber, NBR rubber is far superior to nonpolar rubber such as NR, SBR and IIR in benzene resistance, petroleum-based oil resistance and nonpolar solvent resistance, and also superior to polar CR, but NBR rubber is not good enough in polar solvent resistance and polar oil resistance.
Extended data:
China's NBR is mainly used in military industry, automobile industry and aviation industry, mainly used in oil-resistant parts such as oil tanks and plates, and also used in seals, transmission belts, hoses and plastic modified materials. The dosage is increasing year by year. Almost all rubber hose factories and food factories use nitrile rubber to some extent.
The second largest application field of NBR is sealing rubber products, which are widely used in aerospace devices, transformers, liquefied gas pipelines, gas cover drops, type 0 vehicles and so on. Among them, automobile seals account for about 50% of the total consumption of sealed rubber products. In China, the nitrile rubber used in wire and cable products is about10 million tons every year.
NBR/PP, NBR/polystyrene and NBR/PVC can be prepared by dynamic vulcanization technology and compatibilization technology. New alloy materials such as NBR/PA, NBR/ACR, NBR/CSM, NBR/EPDM and NBR/BR have good market prospects. NBR is also used to manufacture oil-resistant rubber sheets, printing rubber sticks, flame-retardant hydraulic hoses for coal mines, oil tanks, oil drums, oil drums and oil-resistant rubber shoes. ?
Foreign countries are mainly used in aviation, automobile, printing, textile and machinery manufacturing. Due to the development of modified varieties of NBR, the application prospect of NBR is expanded. To sum up, the main activities are: manufacturing flexible Shantou boxes, fuel pipes, oil-leg fabrics, oil seals, oil filling pipes, oil-resistant rubber parts and various products in contact with Shantou.
NBR has good compatibility with PVC and cool acid resin, and is often mixed with resin to modify materials. PVC is usually used to improve processability and impact resistance. The flexible material is made of phenolic resin, and the fluidity material after asphalt mixing is made.
Baidu encyclopedia -NBR