XNBR or Carboxylated Nitrile
- Abbreviation: XNBR
- ASTM D-2000 Classification: BF, BG. BK
- Chemical Definition: Carboxylated Nitrile
Physical & Mechanical Properties
- Durometer or Hardness Range: 50 – 90 Shore A
- Tensile Strength Range: 1,000 – 3,500 PSI
- Elongation (Range %): 250% – 600%
- Abrasion Resistance: Excellent
- Adhesion to Metal: Good to Excellent
- Adhesion to Rigid Materials: Good to Excellent
- Compression Set: Fair to Good
- Flex Cracking Resistance: Fair
- Impact Resistance: Good to Excellent
- Resilience / Rebound: Fair to Good
- Tear Resistance: Excellent
- Vibration Dampening: Fair to Good
Chemical Resistance
- Acids, Dilute: Good
- Acids, Concentrated: Fair to Good
- Acids, Organic (Dilute): Good
- Acids, Organic (Concentrated): Poor
- Acids, Inorganic: Fair to Good
- Alcohol’s: Fair to Good
- Aldehydes: Poor to Fair
- Alkalies, Dilute: Good
- Alkalies, Concentrated: Poor to Good
- Amines: Poor
- Animal & Vegetable Oils: Good to Excellent
- Brake Fluids, Non-Petroleum Based: Poor
- Diester Oils: Fair to Good
- Esters, Alkyl Phosphate: Poor
- Esters, Aryl Phosphate: Poor to Fair
- Ethers: Poor
- Fuel, Aliphatic Hydrocarbon: Good to Excellent
- Fuel, Aromatic Hydrocarbon: Fair to Good
- Fuel, Extended (Oxygenated): Fair to Good
- Halogenated Solvents: Poor
- Hydrocarbon, Halogenated: Poor
- Ketones: Poor
- Lacquer Solvents: Fair
- LP Gases & Fuel Oils: Good to Excellent
- Mineral Oils: Good to Excellent
- Oil Resistance: Good to Excellent
- Petroleum Aromatic: Good
- Petroleum Non-Aromatic: Excellent
- Refrigerant Ammonia: Good
- Refrigerant Halofluorocarbons: R-11, R-12, R-13
- Refrigerant Halofluorocarbons w/ Oil: R-11, R-12
- Silicone: Oil Good
- Solvent Resistance: Good
Thermal Properties
- Low Temperature Range: -50º F to -20º F
- Minimum for Continuous Use (Static): -40º F
- Brittle Point: -50° F to -20º F
- High Temperature Range: +210º F to +250º F
- Maximum for Continuous Use (Static): +250º F
Environmental Performance
- Colorability: Good
- Flame Resistance: Poor
- Gas Permeability: Fair to Excellent
- Odor: Good
- Ozone Resistance: Fair
- Oxidation Resistance: Good
- Radiation Resistance: Fair to Good
- Steam Resistance: Fair to Good
- Sunlight Resistance: Poor to Good
- Taste Retention: Fair to Good
- Weather Resistance: Fair to Good
- Water Resistance: Good
For assistance in identifying the appropriate polymer or material, or to develop and formulate a XNBR or carboxylated nitirle rubber compound to meet your specific application and performance requirements, please contact Rahco Rubber, Inc. at sales@rahco-rubber.com or 847-298-4200.
Rahco Rubber, Inc. makes no expressed or implied warranty as to any qualities, attributes, or characteristics of any polymer or material. This information is provided for reference only.