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Acrylonitrile-Butadiene (NBR)
Copolymers of butadiene and acrylonitrile are known by several generic names, Buna N, Nitrile Rubber and NBR. The acrylonitrile content of NBR compounds varies considerably (18% to 50%) and influences the physical properties of the finished material.
The higher the acrylonitrile content, the better the resistance to oil and fuel. At the same time, elasticity, compression set resistance to low temperature is adversely affected. The lower acrylonitrile content obtains, the better low temperature resistance, but sacrifice some resistance to oil and fuel. In view of these opposing realities, a compromise selection is the medium acrylonitrile content rubber. NBR has good mechanical properties when compared with other elastomers and high wear resistance.
NBR is not resistant to weathering and ozone. Some special compound can improve this defect or use NBR/PVC blending compound which has excellent weathering and ozone resistance and good resistant to fuel but compression set is not so good.
SERVICE TEMPERATURE
For NBR the service temperature can be designed from -55℃ to 100℃ or up to 125℃ depending on different acrylonitrile content and formula. Generally higher than 100℃, life time will be shortened.
HARDNESS
40 to 90 Shore A are available.
COLOR
Black, brown, green, white, rust, yellow, blue, red, orange, and gray are available, or any assigned color from customers.
APPLICATION
NBR compounds have excellent resistance to abrasion, non-polar oils and solvent, water and permeation (higher acrylonitrile content will be better). NBR also can be used in conditions of dilute acids, alkalis and salt solution at low temperatures.
Applying in aromatic hydrocarbons, chlorinated hydrocarbons and polar solvents are not suitable
Standard Products List
| Durometer Shore A |
Color |
Polymer |
Comments |
|
70 |
Black |
NBR |
Std. Compound M2BG714 |
|
70 |
Black |
NBR |
Sulfur cured Meet FDA 21CFR177.2600 Class II spc. |
|
70 |
Black |
NBR |
Sulfur cured Meet FDA 21CFR177.2600 Class I (contact with milk & edible oil, carbon black below 10%) spc. |
|
70 |
Black |
NBR |
General Peroxide curing |
|
70 |
Black |
NBR |
40% ACN compound, good fuel resistance |
|
70 |
Black |
NBR |
Std. Compound, molysulfide internal-lubrication |
|
70 |
Black |
NBR |
Std. Compound, PTFE internal-lubrication |
|
70 |
Black |
NBR |
Sulfur cured Meet FDA 21CFR177.2600 Class II spc. Compatible with ABS, LAXAN, Polycarbonate |
|
70 |
Black |
NBR |
NBR/PVC blending, excellent ozone resistance, good fuel resistance |
|
70 |
Black |
NBR |
Higher heat resistance M2CH714 A25 EO15 EO35 |
|
70 |
Black |
NBR |
18% ACN compound, excellent low temperature resistance(-55℃) M2BF712 |
|
50 |
Black |
NBR |
Std. Compound improve ozone resistance 50pphm |
|
70 |
Black |
NBR |
40% ACN compound, peroxide cured, good fuel resistance |
|
70 |
Black |
NBR |
Higher heat&oil resistance M2CH714 A25 EO16 EO36, Compatible with ABS, LAXAN, Polycarbonate |
|
70 |
Black |
NBR |
40% ACN compound, meet FDA 21CFR177.2600 Class II, good fuel resistance |
|
70 |
Black |
NBR |
NSF61 approval M2BG714 |
|
70 |
Black |
NBR |
Std. Compound erucamide internal-lubrication |
|
60 |
Black |
NBR |
Insulation, resist to 2kV |
|
70 |
Black |
NBR |
Sulfur cured Meet FDA 21CFR177.2600 Class II spc., erucamide internal-lubrication |
|
50 |
Black |
NBR |
Good resistant to oil, below 60 Shore A M2BG512 A14B14EO14EO34 |
|
65 |
Black |
NBR |
Std. Compound graphite internal-lubrication |
|
70 |
Black |
NBR |
Std. Compound oleamide internal-lubrication |
|
70 |
Black |
NBR |
Std. Compound for adhesion metal seal |
|
50 |
Black |
NBR |
Low hardness and high strength, good resistant to oil, M2BG517 A14 B14 EF11 EF21 EO14EO34 |
|
82 |
Black |
NBR |
Good resistant to impact |
|
90 |
Black |
NBR |
Non-nitrosamine |
|
70 |
Black |
NBR |
Std.Compound made in China plant of GE MAO |