Rubber AU - Polyester urethane rubber
Polyurethane, such as polyester urethane rubber, differs from other elastomers. It is obtained from low-molecular-weight and low-viscosity intermediates in a polyaddition process. The processing of this material is achieved through thermoplastic forming or casting of mixtures that are radioactive.
Urethane rubber, both polyester and polyether, is characterized by an extremely high level of strength and elasticity. For this reason, it can be classified as an elastomer, thermoplastic, and thermoset. AU rubber is resistant to abrasion, oils, fuels, and ozone. It also has damping properties. Polyester urethane rubber has slightly better water resistance than polyether urethane rubber. Due to its many advantages, polyester urethane rubber finds applications in various fields. It is used, for example, in the production of seals, which are particularly useful in hydraulics and pneumatic systems.
The operating temperature range of AU rubber is from -30 degrees Celsius to +80 degrees Celsius. For some variations, the temperature resistance can reach up to +105 degrees Celsius in mineral oils.
AU Rubber - Properties
Polyurethanes are resistant to:
- Mineral greases and oils
- Aliphatic hydrocarbons
- Water and non-flammable fluids, such as HSA or HSB
However, they are not resistant to:
- Hot water and steam above 40 degrees Celsius
- Alkalis and acids
- Amines
- Mineral oils
- Organic solvents
What does the abbreviation AU Rubber mean?
The abbreviation AU comes from the English language. It stands for Polyester Urethane rubber.
AU Rubber - Applications
Due to its wide range of properties, polyester urethane rubber is used in high-pressure hydraulic systems as a sealing material - due to its resistance to high pressure - and in pneumatic systems.