Alkyds have for a long time been one of the first choices as binders in outdoor wood coatings. Addition of hard and stiff nano particles would typically reinforce the coating. However, we report that addition of colloidal nano silica reduces the stiffness of alkyd binder due to influence on auto-oxidation curing. Influence on the curing has the potential to extend the time before alkyds become too brittle and crack. This is explored through prolonged curing at increased temperature.
Keywords: auto-oxidation, crosslinking, nano silica, alkyd, wood coatings
Authors
Nikolic M.
Biomass science and technology group, Department of Geosciences and Natural resource Management, IGN, Copenhagen University, Frederiksberg C, Denmark
Barsberg S.
Biomass science and technology group, Department of Geosciences and Natural resource Management, IGN, Copenhagen University, Frederiksberg C, Denmark
Loef D.
Dyrup/PPG, Søborg, Denmark
Sanadi A.
Biomass science and technology group, Department of Geosciences and Natural resource Management, IGN, Copenhagen University, Frederiksberg C, Denmark
Login to download the PDF