Perbunan® | Perbunan® represents a range of oil-resistant acrylonitrile-butadiene rubbers (NBR) with a particularly high level of quality and properties. The product range includes grades with 18 to 45% acrylonitrile content and Mooney viscosity from 30 to 125. With Perbunan®, it is possible to obtain oil-resistant vulcanizates that can resist extremely low temperatures. In comparison with vulcanizates based on other NBRs, Perbunan vulcanizates show clearly better physical properties, heat aging resistance and abrasion and wear behavior.
For the manufacturer of rubber articles, an important feature of Perbunan® is its vulcanization behavior. Perbunan® compounds are fast-curing, a property that contributes to an improvement in productivity.
Perbunan® can look back on a long history. It was developed by Bayer in the 1930s as the first-ever oil-resistant rubber. Since then there have been several "modernizing" improvements and today it is manufactured according to principles that take into consideration not only the good physiological properties of the rubber but also protection of the environment.
Perbunan® is recommended for many technical rubber articles. Perbunan® is the first choice for oil seals. Here, the "second generation" Perbunan® grades were developed to allow consistent and trouble-free production.
A series of special applications in the automotive and construction industries would not be possible without Perbunan®. For example, applications in the automotive industry, where the maximum operating temperature does not substantially exceed 120°C, are oil filter seals, torsional vibration dampeners, membranes, membranes in fuel injection systems, fuel and oil pipes, hose in hydraulic systems.
In machines and installations, Perbunan® is used in all sorts of static and dynamic seals, from O-rings to complicated shaft seals, in heat exchanger seals, in pressure hose, rolls and drive belts.
Perbunan® is a possible base material for articles for food contact applications such as milking inflation tubes, aerosol seals and food-carrying hoses.
Key Properties
- very good resistance to oils, greases and fuels
- very good low temperature flexibility
- good physical properties (modulus, compression set)
- good resistance to aging
- high resistance to wear
- low gas permeability
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