| 摘要 |
PROBLEM TO BE SOLVED: To obtain a coating agent composition which can impart the effect of persistently inhibiting the formation of black molds, a deodorizing effect and a sterilizing effect to the inside and outside walls of a building and the surface of a sliding paper door by mixing a resin emulsion with ultramicroparticulate transparent titanium oxide having the function of inducing a photocatalytic reaction. SOLUTION: This composition is prepared by mixing 1μm or smaller ultramicroparticulate transparent titanium oxide (A) with a resin emulsion (B). Component A is titanium dioxide having the function of inducing a photocatalytic reaction and is usually in the form of a commercially available ultramicroparticles having a size of 0.005-0.1μm. Component A is capable of semipermanently generating free hydroxyl radicals from water when it receives photoenergy as high as that of sun light and therefore has the function of cleaning black molds and adherent organic matter by decomposition and of inhibiting germination of seeds of plants such as weed. Examples of component B used include aqueous emulsions of vinyl acetate resins, SB resins and acrylic resins. This composition can be prepared by mixing components A and B by means of a common emulsifier/disperser.
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