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Polimocznik kontra hybryda
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Polimocznik kontra hybryda

These specialty amines generally possess soft, flexible polyoxypropylene
backbones that significantly contribute to the hydrophobic/waterproof nature
of the respective polyurea coatings. These alternating hard block/soft block
polymer units are linked by DETDA, which is commonly referred to as the
“chain extender” of the system.
Spray equipment
Processing of spray polyurea coatings requires specialised, high pressure/
high temperature impingement mix equipment. The capability of heating the
components prior to mixing is a key attribute of the spray equipment, as it
was found that heating of the materials prior to spray was necessary to
reduce system viscosity (i.e. the isocyanate amine resin blend components).
Viscosity reduction improves the mix, flow, and leveling of the applied material
and leads to significant improvements in the performance and appearance
of the coating. To ensure proper mixing, it was found that the use of a highpressure
proportioner and a spray or pour gun are essential.
Application areas
The concept of instant, high-performance coatings has attracted the interest
of many who possess an entrepreneurial spirit, as well as those with vivid
imaginations. In the infancy of this new polyurea technology, spray applications
of structures and objects too numerous to fully list, were attempted.
As already mentioned, the reaction of the isocyanate component with the
amine blend is generally a very rapid, predictable reaction. The fast reactivity
allows for rapid return to service for coating application work.
The current polyurea technology allows the preparation of both aromatic
and aliphatic (light stable) elastomer systems. By selecting the appropriate
isocyanate component and amine blend, a variety of system reactivities is
possible. Slower systems can be utilised for a variety

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