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Nitrile Butadiene Rubber

Nitrile-butadiene rubber (NBR) is a copolymer made from butadiene and acrylonitrile. NBR is essential for technical rubber products that need to be resistant to mineral oils, service fluids, and greases in automotive applications and machinery.

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Krynac® 2645 F Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 45 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 26,0 wt % ISO 24698
Density 0,96 g/cm³ Internal Method
Krynac® 2850 F Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 48 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 27,5 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
Krynac® 2865 F Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 65 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 28,0 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
Krynac® 33110 F High Mooney
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 110 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 33,0 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
Krynac® 3330 B Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 30 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 33,0 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
Krynac® 3330 F Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 30 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 33,0 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
Krynac® 3344 VP Low VOC
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 44 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 33,0 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
Krynac® 3345 B Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 40 60 MU ISO 248 / ASTM D 5668 ML (1+8) 45 °C
Solution Viscosity 14 cps ISO 247 / ASTM D 5667 45 kg
Brookfield Viscosity 10 cps ISO 248 / ASTM D 5668 20 °C
Dissolving Time 23 hrs m53
Melt Flow Index 20 °C 33 g/10mi ISO 248 / ASTM D 5668
Molecular Weight Distribution 20 wt % Broad ISO 247 / ASTM D 5667
Polymer Structure 66 %
Bromine Content 12 40 wt % ASTM D 5774
Chlorine Content 33 12 wt % ASTM D 3314
Ethylene Content 33 wt % ASTM D 5668
ENB Content 34 wt % MO AQ 255 LAB
Acrylonitrile Content 33,0 wt % ISO 24698
Vinyl Acetate Content 23 12 wt %
Styrene Content > 45 wt %
Vinyl Content < 55 wt %
Density 0,97 g/cm3 Internal Method 20 °C
Ash Content 23 wt % ASTM D 3314
Volatile Content > 22 wt % ASTM D 297
Color 10 ISO 248 / ASTM D 5668
Free Soap > ISO 248 / ASTM D 5668
Organic Acid Content 45 wt % ISO 248 / ASTM D 5668
Particle Size 56 mm Internal Method
pH > 7
Krynac® 3345 F Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 45 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 33,0 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
Krynac® 3370 F Medium Cure
Property Nominal Value Test Method Condition Temperature
Mooney Viscosity 70 MU ISO 289 / ASTM D 1646 ML (1+4) 100 °C
Acrylonitrile Content 33,0 wt % ISO 24698
Density 0,97 g/cm3 Internal Method
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