Imports of nitrile rubber O-ring what is imported nitrile rubber o-rings? Nitrile rubber, butadiene and propylene by Green obtained by emulsion polymerization, nitrile rubber emulsion produced mainly by low temperature, excellent oil resistance, high abrasion resistance, heat resistance and good adhesive power . The disadvantage is poor low temperature resistance, ozone resistance poor, poor electrical properties, elastic lower. Nitrile rubber is mainly used to produce oil and rubber products. Nitrile rubber o-ring Description: English name: nitrile butadiene rubber which is also known as NBR. Green copolymer of butadiene and propylene prepared a synthetic rubber. Is oil (particularly paraffin oil), anti-aging better performance synthetic rubber. Nitrile rubber green propylene content (%) 42 ~ 46,36 ~ 41,31 ~ 35,25 ~ 30, 18 ~ 24 other five. Green propylene content of more oil the better, but the cold is correspondingly reduced. It can be used in an oil or long-term 150 ℃ in air 120 ℃ in. In addition, it has good water resistance, air tightness and excellent bonding properties. Widely used in making a variety of oil and rubber products, a variety of oil washers, gaskets, sleeves, flexible packaging, soft tube, printing rollers, cable plastic materials in the automotive, aerospace, petroleum, copying and other industries become indispensable elastic material. Nitrile butadiene rubber, also known as a green propylene rubber, referred to as NBR, the average molecular weight of about 700,000. Off-white to pale yellow solid lump or powder, the relative density of 0.95 to 1.0. Propylene content of 26% green rubber Dêngqên a glass transition temperature Tg = 52 ℃, brittle transition temperature Tb = a 47 ℃, while the propylene content of 40% of green rubber Dêngqên a glass transition temperature Tg = 22 ℃. The solubility parameter δ = 8.9 ~ 9.9, dissolved in ethyl acetate, butyl acetate, chlorobenzene, and methyl ethyl ketone. Nitrile rubber having excellent oil resistance, oil resistance after its polysulfide rubber and fluorine rubber, and has wear resistance and air tightness. Disadvantages Dingqing rubber is intolerant of ozone and aromatic, halogenated hydrocarbons, ketones and esters solvents, insulation material should not be done. Heat resistance than rubber, chloroprene rubber, can be long-term work at 120 ℃. Tightness behind butyl rubber. Properties affected Dingqing propylene rubber content of green, blue with increasing propylene content, tensile strength, heat resistance, oil resistance, airtightness, hardness, but the elastic, cold resistance decrease. Ding Qing rubber ozone resistance and electrical insulation properties is poor. Good water resistance. Nitrile rubber o-ring role: polar nitrile rubber is very strong, and compatibility with other polymers is generally very good, but, and neoprene, modified phenolic resins, polyvinyl chloride and other polar strong polymers, especially chlorinated polymer having good compatibility, is usually carried out with. In addition, in order to improve the workability and performance, often Dingqing rubber and natural rubber, styrene butadiene rubber, butadiene rubber and other non-polar rubber and use. It should be noted that: the characteristics Dêngqên rubber is good oil resistance, and used with other polymers (other than PVC) have a tendency to reduce the presence of oil resistance.