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Nitrile rubber (NBR)
Unsaturated rubbers based on acrilnitrile-butadiene polymer compounds.
Excellent resistance to oils, mineral, vegetable and animal greases, as well as aliphatic hydrocarbons. Resistant to alkali. Not suitable for use with ammines, ketones, esters, benzene esters, chlorinated solvents and concentrated acids.
Applications: oil seal units, O-rings, seals
Use temperature: from -40°C to 120°C

Characteristics of the base elastomer:
Common name: Nitrile rubber NBR
Commercial name: Perbunan N, Europrene N.
It is a butadiene-acrilnitrile copolymer, the ACN percentage can range from 18% to 50%.

Characteristics
- Good mechanical properties
- Good resistance to permanent deformation (compression-set)
- Good air and gas impermeability
- It can be colored
- Poor resistance to UV radiations
- Poor dielectric properties
- No flame resistance
Compatibility and chemical behavior

Good resistance to:
- mineral oils and greases
- light fuel oils, diesel fuel
- aliphatic hydrocarbons
- vegetable and animal oils
- hot water (100°C), salt water, saline solutions

average resistance to:
- Fuels with a high aromatic content
- Some types of freon
- diluted acid solutions
- Petroleum based hydraulic fluids
- diester based synthetic lubricants

poor resistance to:
- Benzene and chlorinated hydrocarbons
- Aromatic hydrocarbons (benzol)
- phosphoric ester based hydraulic fluids
- Various glycol based brake fluids