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XNBR - Carboxylated nitrile butadiene rubber

Clwyd referenceXNBR
ASTM classificationXNBR
Typical applications
  • V-belts
  • Shoes
  • Printing rolls
Advantages
  • Better tensile properties than NBR
  • Higher continuous service temperature
  • Good chemical resistance
  • Improved tear and abrasion properties than NBR
Disadvantages
  • Not suitable for brake fluids, ketones, strong acids or phosphate esters
  • Poor resistance to ozone and weathering
  • Higher compression set
Available hardness range (Shore A)50 - 95
Upper continuous service temp.125°C
Min. temp. for sealing applications-15°C
Minimum non-brittle  temp. -30°C
Tensile strength (up to)25 MPa
Elongation at break (up to)250%
Price BracketVery low
ASTM 1 OilExcellent
ASTM 2 OilExcellent
ASTM 3 OilExcellent
KeroseneExcellent
Liquid BAverage
Liquid 101Excellent
Phosphate esterNone
KetoneNone
TolueneNone
Iso-octaneGood
MethanolExcellent
Acid (weak)Average
Acid (strong)None
Base (weak)Good
Base (strong)None
Hydrogen sulphideNone
SteamNone
OzoneAverage
RadiationAverage

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