The properties of hydrogenated nitrile rubber qualities (HNBR) are dependent on the acrylonitrile content and the degree of hydrogenation of the butadiene copolymer. They have better oil and chemical resistance than nitrile rubber compounds, and can withstand higher temperatures.
HNBR has excellent resistance to hot water, steam and ozone.
Top mechanical properties like
- tensile and tear strength
- abrasion resistance
- compression set, etc.
and the compounds display strong dynamic behavior at elevated temperatures. The typical temperature range is between -30°C and 150°C (-20°F to + 302°F). HNBR can either be cured with sulphur or with peroxide, depending on which properties are the most important.
Typical applications include
- rubber moulded parts
- dynamic seals
and products where high tensile strength or abrasion resistance is needed, e.g.
- mud motors
- rotary steerable tools
- Measurement While Drilling (MWD)
- Logging While Drilling (LWD), etc.
Typical applications also include accumulator bladders, diaphragms, and gaskets. Limitations include poor electrical properties, poor flame resistance and swelling with aromatic oils.
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