| 摘要 |
PROBLEM TO BE SOLVED: To form a coated surface excellent in resistance to stains without detriment to excellent moisture absorbing and desorbing properties and woody texture originally possessed by wood by employing a fluorine-containing silicone resin emulsion specified in its solid concentration, surface tension and pH and without employing organic materials which release formaldehyde or a volatile organic compound. SOLUTION: As a water-base coating material for wood is employed a fluorine-containing silicone resin emulsion having a solid concentration of 4-10 wt.%, a surface tension of 27-34 mN/m and a pH of 4.5-8.5. From the viewpoint of the wetting property to the surface of wood, penetrability, recoatability and the like, the surface tension is preferably low and can be regulated by the addition of a surfactant. As the surfactant capable of attaining uniform coating without bubbles and lowering the surface tension, an acetylene diol type surfactant is preferable. Preferably, the fluorine-containing silicone resin emulsion contains around 20 wt.% of fluorine so as to ensure excellent resistance to stains of the coated surface.
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