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