Industry News

December 23, 2019 2019
Nitrile Type And Classification

There are more than 320 brands of NBR.  It depends on the content of acrylonitrile, polymerization temperature, Mooney viscosity, physical form, processing performance and antioxidant type.


Commercial acrylonitrile-butadiene rubber in the scope of 18-50% of the amount of propylene, the main brand 28-40% , and in turn divided into 5 grades.

 

1) Extremely high nitrile grade with acrylonitrile content of 42%

 

2) Extremely high nitrile grade with acrylonitrile content of 36-41%

 

3) Extremely high nitrile grade with acrylonitrile content of 31-35%

 

4)Extremely high nitrile grade with acrylonitrile content of 25-30%

 

5) Extremely high nitrile grade with acrylonitrile content of below 24%

 

Classified by polymerization temperature


There are two kinds of high temperature polymerized nitrile rubber and low temperature polymerized nitrile rubber, which are mainly produced by low temperature polymerization.

 

 Classified by Mooney viscosity


The MOONEY viscosity of Commercial NBR is 20-140 at 100 °c 1 + 4 and 25-100 for the main varieties

 

Physical type

 

There are block, sheet, powder or granular and liquid form of several forms of nitrile rubber.

 

 Classification by processing and using performance

 

NBR is of universal, processable, soluble, partially cross-linked, non-corrosive to metals, auxiliaries, carboxylated NBR, polyvinyl chloride modified NBR, resin and other types.

 

Classified by antioxidant

 

There are pollution type, micro-pollution type and non-pollution type NBR.


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