Poliuretan AU, EU Vulkollan, Urepan, Desmopan, Elastothone, Pellethane, Adipren, Simputhar

Polyurethanes, in contrast to other elastomers are obtained by polyaddition of low molecular weight and a little viscous intermediates. Processing is carried out either by a thermoplastic molding from prepared granules ( PUR thermoplastic elastomers ), or by casting the reactive mixtures. One can also use the conventional methods of processing the polymer by mixing the elastomer with the fillers and crosslinking of the final roll of the vulcanization molds. AU and EU due to extremely high strength, pliability and flexibility can be classified in terms of properties between the elastomers and thermoplastics, thermosets . They are characterized by very high resistance to abrasion, resistant to oils, fuels and ozone, have a fairly significant mechanical damping. AU has a slightly better water resistance than the EU. Due to the above mentioned advantages of this material, it is used for the production of seals in the high pressure hydraulics and pneumatics./

Operating temperature range is from -30 to +80°C, for refined variations in mineral oil to 105°C.

Polyurethanes are resistant to:

• mineral oils and greases
• aliphatic hydrocarbons
• water and non-flammable hydraulic fluids type HSA and HSB

Polyurethanes are not resistant to:

• hot water above 40°C and water vapor
• dilute alkalis and acids
• amines
• refined mineral oils
• organic solvents such as acetone or tri