A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
New acrylic binder technologies for water-based exterior wood coatings
Multiphase straight acrylic particles give a means to fulfil the contradictive properties which modern water-based wood coatings demand. Morphology control in particles containing hard and soft polymer fractions is here the tool to combine excellent blocking resistance and hardness with the necessary elasticity for good outdoor durability on wood. To improve further application properties, such as in can-clarity, blushing resistance and interaction with associative thickeners the particle size has to be reduced to values lower then 50 nm in conjunction with the lowest surfactant levels. Further improvements in properties are possible by replacing the hard polymer fractions by nanoscale fine inorganic particles (e.g. silica), leading to organic-inorganic hybrid materials. Such nanocomposite dispersions can be produced via a special emulsion polymerization process using silica sols and acrylic monomers. The resulting nanocomposite films and formulated wood coating materials show interesting hot blocking behaviour, enhanced water vapour permeability, excellent blushing resistance and outstanding durability especially in top coats for joinery application.
New acrylic binder technologies for water-based exterior wood coatings
Multiphase straight acrylic particles give a means to fulfil the contradictive properties which modern water-based wood coatings demand. Morphology control in particles containing hard and soft polymer fractions is here the tool to combine excellent blocking resistance and hardness with the necessary elasticity for good outdoor durability on wood. To improve further application properties, such as in can-clarity, blushing resistance and interaction with associative thickeners the particle size has to be reduced to values lower then 50 nm in conjunction with the lowest surfactant levels. Further improvements in properties are possible by replacing the hard polymer fractions by nanoscale fine inorganic particles (e.g. silica), leading to organic-inorganic hybrid materials. Such nanocomposite dispersions can be produced via a special emulsion polymerization process using silica sols and acrylic monomers. The resulting nanocomposite films and formulated wood coating materials show interesting hot blocking behaviour, enhanced water vapour permeability, excellent blushing resistance and outstanding durability especially in top coats for joinery application.
New acrylic binder technologies for water-based exterior wood coatings
Neue Technologien für Acryl-Bindemittel in wasserbasierten Holzanstrichen für Außenanwendungen
Baumstark, Roland (author) / Tuchbreiter, Arno (author)
2008
18 Seiten, 16 Bilder, 16 Quellen
Conference paper
English
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