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What is HNBR rubber?

HNBR is a hydrogenated version of NBR (nitrile) rubber. HNBRs have better oil and chemical resistance than nitrile rubbers and can also withstand higher temperatures. HNBR rubber has excellent resistance to oils and fuels but it also has excellent resistance to many chemicals, steam / hot water and ozone. The mechanical properties e.g. tensile and tear strength, elongation, and abrasion resistance are excellent.

BUR-A-LOY and ProFlex

Properties of HNBR Rubber

These are some of the properties of HNBR rubber compounds:

Grades
Acrylonitrile content, degree of unsaturation
Hardness Range (ShA)
50 – 90
Thermal Resistance continuous/peak (°C)
140 / 160
Low temperature (°C)
– 40 to – 30
Chemical Resistance
Apolar fluids, oils, greases, diluted acids and bases, hydraulic fluids, diluted acids and bases, sour gases, steam
Weatherability
Ozone resistance
Others
Excellent mechanics and resistace to abrasion
Curing
Sulphur, peroxide

Material processing

The manufacturing technologies of these types of compounds are the traditional compression and injection moulding, extrusion, calendering and coating process. All unsaturated elastomers are generally reticulated through sulphur, but peroxides can also be used. Those which do not have unsaturated bonds like EPM compounds can be reticulated with peroxides only. Some specialities require exclusive reticulation agents that take advantage of specific chemical properties.

What is HNBR rubber typically used for?

HNBR is widely used in automotive, industrial applications, oil and gas industries, food and pharma, and medical markets. The automotive market uses HNBR for a host of dynamic and static seals, hoses, belts, coolants, AdBlue / oil and fuel systems. HNBR has also been widely employed in industrial sealing for oil field exploration and processing, as well as rolls for steel and paper mills.

HNBR Serpentine belt engine mechanism

Rubber Application Matrix

HEXPOL’s rubber compounds can be used in a variety of different applications. Download our Application Matrix to see which compounds can fit your application.

Rubber Application Matrix

Contact Us to Discuss HNBR

Sara Cotelli

High Performance Compounding, Europe, Middle East, Asia, and India

info@mesgo.it
+39 (0) 35 42 52 000
Gary Moore

Gary Moore

Advanced Rubber & High Performance Compounding, Americas

gary.moore@hexpol.com
+1 682 215 7096
Marc Pignataro

Marc Pignataro

Advanced Rubber & High Performance Compounding, Americas

marc.pignataro@hexpol.com
+1 440 391 4318

High performance compounds

Learn more about typical high performance polymers in our material range.

Contact our global experts

To learn more about how we can make a material difference in your business, contact our skilled staff representatives for more detailed information.

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