Nitrile rubber NBR is a special material for oil-resistant flexible rubber joints

Technical parameters of NBR:

　　Menny viscosity(ML1+4100%)50 Gel content %10~30

　　Judberd self-developed high temperature and oil resistant rubber joints have been put on the market after long-term tests. No matter used in any environment, our high temperature rubber joints will not degum and warp. At present, they are widely used in steam pipes, hot water pipes and high temperature powder pipes.

　　Oil resistant rubber supporting system for various oil resistant rubber joints:

　　I. Curing system

　　Generally speaking, increasing the crosslink density can improve the oil resistance performance of vulcanized rubber. In oxidized fuel oil, NBR vulcanized with peroxide or semi-effective vulcanization system has better oil resistance performance than NBR vulcanized with sulfur. Peroxide vulcanized NBR has the best stability at 40°C, while it is less stable at 125°C. And the nitrile rubber vulcanized with cadmium sulfur system has better long-term thermal aging resistance in oxidized fuel oil at 125℃.

　　2. The filling system and plasticizer

　　Adding carbon black and silica can improve the oil resistance. Softeners should be those that are not easily extracted by oil. The best choice for low molecular polymers, such as low molecular polyethylene, oxidized polyethylene, polyester plasticizer and liquid rubber. Softeners or plasticizers with high polarity and molecular weight are beneficial for oil resistance.

　　Rubber is classified by oil resistance (polar rubber): Cr, NBR, HNBR, ACM, AEM, CSM, FKM, fmvq, Co, pur.

       Non-oil resistant rubber (non-polar rubber) classification: NR, IR, Br, SBR, IIR, EPR, EPDM

NBR is copolymerized from butadiene and acrylonitrile, which is an oil and aging resistant synthetic rubber with excellent oil resistance, abrasion resistance and air tightness. The higher the content of acrylonitrile in NBR, the better its oil and solvent resistance.

NBR can be divided into general-purpose nitrile rubber and extraordinary nitrile rubber according to its performance and application scope.

In terms of morphology, in addition to solid NBR (lumpy, granular). There are also powder nitrile rubber, liquid nitrile rubber and nitrile latex, etc. NBR has good resistance to oil, water, solvents and high pressure. These factors determine the good compressibility, abrasion resistance and anti-pull-off of rubber joints. NBR is the most widely used and lowest cost raw material for making rubber joints and other seals.