Nitrile butadiene rubber – low ACN

Clwyd reference	NBR L
ASTM classification	NBR L
On NBR with low ACN: the lower the acrylonitrile content the poorer the oil and chemical resistance but higher the low temperature properties. Low acrylonitrile will have brittle points at -45C.
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)	40 - 95
Upper continuous service temp.	150°C
Min. temp. for sealing applications	-40°C
Minimum non-brittle temp.	-55°C
Tensile strength (up to)	24 MPa
Elongation at break (up to)	500%

Price Bracket	Very low
ASTM 1 Oil	Good
ASTM 2 Oil	Good
ASTM 3 Oil	Good
Kerosene	Good
Liquid B	Average
Liquid 101	Good
Phosphate ester	None
Ketone	None
Toluene	None
Iso-octane	Good
Methanol	Good
Acid (weak)	Average
Acid (strong)	None
Base (weak)	Average
Base (strong)	None
Hydrogen sulphide	None
Steam	None
Ozone	Average
Radiation	Average