Rubber NBR

It is generally referred to as nitrile rubber nbr and is used in the sealing of oils and fuels. It also exhibits good flexural and abrasion resistance.

The acryl-nitrile content in the compound can vary between 20% and 50%, which leads to large variations in the chemical-physical behaviour of the rubber.

NBR does not have a good resistance to ageing in contact with oxygen and ozone, and the tendency to degrade increases with increasing operating temperature; for better use, it is prudent to avoid direct contact between the rubber and air, using it in immersion applications or maintaining a protective layer of lubricating oil.

General Features: Rubber NBR

Operating temperature: (-30) -15 to 100 (110) C°

Shore hardness: 40 ÷ 90 / Specific weight: 1.15 ÷ 1.50

  • Good mechanical properties
  • Good resistance to permanent deformation (compression-set)
  • Good air and gas impermeability
  • Good colourability
  • Absence of toxicity
  • Poor resistance to UV radiation
  • Poor dielectric properties
  • Zero flame resistance

Trade names: Rubber NBR

Perbunan (Bayer AG), Hycar (B.F. Goodrich Chem. Co.), Krynac (Polymer Corp.), Elaprim (Montedison), JSR-N (Japan Synth. Rubber Co.).

Compatibility and Chemical Behaviour: Rubber NBR

NBR Rubber Chemist

  • Mineral oils and greases
  • Light fuel oils, diesel
  • Aliphatic hydrocarbons
  • Vegetable and animal oils and fats
  • Hot water (+ 100 °C)
  • sea water, saline solutions

Medium resistance:

  • Fuels with high aromatics content
    Different types of Freon
    Dilute acid solutions
    Concentrated alkaline solutions
    Oil-based hydraulic fluids
    Synthetic lubricants based on diesters

Poor resistance:

  • Benzene and chlorinated hydrocarbons
  • Ozone and atmospheric agents
  • (except compounds with protective agents)
  • Aromatic hydrocarbons (benzole)
  • Phosphoric ester-based hydraulic fluids
  • Various glycol-based brake fluids
  • Phenol
  • Ketones and esters
  • Concentrated strong mineral acids and hot dilute alkaline solutions

Specialising in industrial seals

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