XNBR | Carboxylated Nitrile Butadiene Rubber

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