A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Inorganic nano-particles as functional additives in waterborne one-component coatings.
The use of two different inorganic nano particles was investigated in waterborne one component coatings. Main application area for these coatings is wood. A first type of functional inorganic nano particle are organically modified colloidal silica sols. They contribute to vastly improved mechanical properties of the coatings without detracting from the esthetical aspects. In a second application of nano-technology layered silicates with a cationic surface charge have been found to be very effective in stopping the bleeding of tannins or other staining substances from wood. This prevents the discoloration of the coating often observed when the coated article is exposed to humidity. The modification (exfoliation, intercalation) of the layered silicate and its introduction into the coating is discussed. Hydrotalcite (Mg4Al2(OH)12CO3.H2O), a layered double hydroxide, also performed well. A clear tannin blocking sealer was prepared containing self-crosslinking acrylic dispersion, hydrotalcite slurry (2.5 % solids), methoxy propanol, and additives. It stopped the bleeding of merbau and redwood testpieces.
Inorganic nano-particles as functional additives in waterborne one-component coatings.
The use of two different inorganic nano particles was investigated in waterborne one component coatings. Main application area for these coatings is wood. A first type of functional inorganic nano particle are organically modified colloidal silica sols. They contribute to vastly improved mechanical properties of the coatings without detracting from the esthetical aspects. In a second application of nano-technology layered silicates with a cationic surface charge have been found to be very effective in stopping the bleeding of tannins or other staining substances from wood. This prevents the discoloration of the coating often observed when the coated article is exposed to humidity. The modification (exfoliation, intercalation) of the layered silicate and its introduction into the coating is discussed. Hydrotalcite (Mg4Al2(OH)12CO3.H2O), a layered double hydroxide, also performed well. A clear tannin blocking sealer was prepared containing self-crosslinking acrylic dispersion, hydrotalcite slurry (2.5 % solids), methoxy propanol, and additives. It stopped the bleeding of merbau and redwood testpieces.
Inorganic nano-particles as functional additives in waterborne one-component coatings.
Anorganische Nanopartikel zur Verbesserung von Einkomponenten-Wasserbasislack
Mestach, Dirk (author) / Twene, Derrick (author)
2005
14 Seiten, 13 Bilder, 5 Tabellen, 8 Quellen
Conference paper
English
Wax Emulsion Additives for Waterborne Coatings
| British Library Online Contents | 1996
Water-insoluble additives for waterborne coatings - a contradiction?
| Tema Archive | 2004
Effect of nano-Fe2O3 particles on the corrosion behavior of alkyd based waterborne coatings
| British Library Online Contents | 2009
Using 'High performance two-component waterborne polyurethane' wood coatings
| Tema Archive | 1997
Qualifying Waterborne Coatings
British Library Online Contents | 1994