Nitrile rubber is two monomer by emulsion polymerization of butadiene and acrylonitrile copolymer.
The performance of NBR is as follows: 1.
Of nonpolar or weak polarity mineral oil, animal and plant oil, liquid fuels, and solvent with higher stability.
Oil is the biggest specialty.
The higher the acrylonitrile content, the better.
Heat resistance is better than that of natural rubber, butylbenzene rubber, neoprene.
Good air tightness.
Only time and butyl rubber.
Hardy is poor.
Because is a crystallization of rubber, raw rubber strength is low, must join the reinforcing agent to improve the wear-resisting property, but decreased elasticity.
Dielectric properties is poor, belong to the semiconductor rubber 7.
Oil resistance and permanent deformation of the balance.
Cooperate with NBR general requirements: matching principle and natural rubber, butylbenzene rubber, the vulcanization accelerator vulcanization system can also be low sulphur, no sulfur curing system or peroxide vulcanization.
Must join the reinforcing filler.
Carbon black rubber spray process performance is good, light color products is multi-purpose white carbon black, hard clay, cohesive energy is larger between macromolecules.
So high viscosity, poor processability, join plasticizer, softener can reduce viscosity, improving process performance and low temperature vulcanized rubber performance.
Nitrile rubber USES: mainly used in making oil resistant rubber products, widely used in the manufacture of seals, gaskets, etc.
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