NBR H - Nitrile butadiene rubber – high ACN

Clwyd reference NBR H
ASTM classification NBR H

On NBR with high ACN: the higher the acrylonitrile content the better the oil and chemical resistance but poorer the low temperature properties. High acrylonitrile will have brittle points at -15C.

Typical applications
  • Aeronautical (good heat resistance, up to around 110 C)
  • Oil resistant seals and diaphragms
  • Non-latex gloves
  • Rollers
Advantages
  • Excellent resistance to oil
  • Good resilience
  • Physical and chemical properties dependent on the ACN content; the higher the ACN content the better the resistance but the lower the flexibility
Disadvantages
  • Inferior to NR in terms of physical strength and flexibility
  • Can be attached by ozone, aromatic hydrocarbons, ketones, esters and aldehydes.
Available hardness range (Shore A) 50 - 95
Upper continuous service temp. 150°C
Min. temp. for sealing applications -25°C
Minimum non-brittle  temp.  -45°C
Tensile strength (up to) 28 MPa
Elongation at break (up to) 400%
Price Bracket Very low
ASTM 1 Oil Excellent
ASTM 2 Oil Excellent
ASTM 3 Oil Excellent
Kerosene Excellent
Liquid B Good
Liquid 101 Excellent
Phosphate ester None
Ketone None
Toluene None
Iso-octane Excellent
Methanol Excellent
Acid (weak) Average
Acid (strong) None
Base (weak) Good
Base (strong) None
Hydrogen sulphide None
Steam None
Ozone Average
Radiation Average
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