Polymeric mixture of butadiene and acrylonitrile in the respective ratio 2:1.

Ratios can be varied to change physical properties...higher levels of acrylonitrile yield low temperature flexibility, and increase compound hardness

Highly polar elastomer (large and reversible elsatic deformation)

  Excellent Good Fair Poor

Tensile strength   •    

Elongation   •    

Low temperature flexibility   •    

Compression Set   •    

Tear resistance   •    

Abrasion resistance •      

Flame resistance       •

Gas permeability   •    

  Excellent Good Fair Poor

Water •      

Petroleum oil •      

Silicone lubricants •      

Dilute acids   •    

Dilute alkalis   •    

Hydraulic fluids   •    

Transmission fluid   •    

Steam     •  

Ozone       •

Weather       •

Ketones       •

Strong acids       •

Brake fluid       •

Vibration Control of horizontal forces up to 125 tons

O Rings, gaskets, sealants, grommets and tubing pads

Frequently used in automotive air conditioning systems employing R-134a refrigerants

Nitrile should not be exposed to › direct sunlight › moderate to high levels of atmospheric

ozone › oxygen

Must be used in a closed system

Nitrile accepts antidegradants, which improve the aforementioned properties› PVC (polyvinyl chloride)› Hydrogenation

High tensile strength Low permanent set Good abrasion resistance High elasticity Stability toward thermal ageing Better properties at low temperatures

Nitrile rubber is hydrogenated in solution using precious metal catalysts

Carbon-carbon bonds are converted to more stable single bonds (controls different states)

Can be crosslinked using sulphur and peroxide cure systems

Nitrile 1/32” thick $14.80

per square yard ¼” thick $72.20 per

square yard

Hydrogenated Nitrile 2 to 3 times more

expensive than the conventional polychloroprene used now

New features will allow it to last 5.5 times longer