A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polyurethane wood coatings - the waterborne approach
In order to further optimize the technology of waterborne low-VOC 2K polyurethane coatings, both the polyol and the hardener (polyisocyanate) were investigated with the goal of achieving a property level comparable to conventional polyurethane coatings. A basic consideration was that the properties as well as the application and drying parameters should be maintained or even improved compared to solventborne systems. A sterically hindered amino sulfonic acid salt was reacted with a hexamethylenediisocyanurate to produce a hydrophilic polyisocyanate crosslinker with internal anionic hydrophilicity. As the anionic group is much more effective than polyether chains, a small particle size of the dispersed polyisocyananate was achieved at low concentrations of ionic groups. The chemical resistance of white pigmented polyurethane formulations with the new crosslinker was compared to a conventional system.
Polyurethane wood coatings - the waterborne approach
In order to further optimize the technology of waterborne low-VOC 2K polyurethane coatings, both the polyol and the hardener (polyisocyanate) were investigated with the goal of achieving a property level comparable to conventional polyurethane coatings. A basic consideration was that the properties as well as the application and drying parameters should be maintained or even improved compared to solventborne systems. A sterically hindered amino sulfonic acid salt was reacted with a hexamethylenediisocyanurate to produce a hydrophilic polyisocyanate crosslinker with internal anionic hydrophilicity. As the anionic group is much more effective than polyether chains, a small particle size of the dispersed polyisocyananate was achieved at low concentrations of ionic groups. The chemical resistance of white pigmented polyurethane formulations with the new crosslinker was compared to a conventional system.
Polyurethane wood coatings - the waterborne approach
Irle, Christoph (author) / Bayona, Martin (author) / Roschu, Rolf (author)
2004
10 Seiten, 4 Bilder, 2 Tabellen, 6 Quellen
Conference paper
English
Polyol , Wasserlack , Polyurethanbeschichtung , Polyisocyanat , Hexamethylendiisocyanat , Quervernetzung , Quervernetzungsmittel , chemische Beständigkeit , giftiger organischer Bestandteil , Dispersion , Holzschutzmittel , Anstrich (Überzug) , weiße Farbe , Vergleich , Trocknen , Teilchengröße , hydrophile Gruppe , Umweltfreundlichkeit , Lack
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