| abstract |
A photocatalytic coating material which comprises (a) photocatalytic oxide particles, (b) a hydrophobic-resin emulsion, and (c) water, wherein the photocatalytic oxide particles have a smaller average particle diameter than the particles dispersed in the hydrophobic-resin emulsion. Also provided is a self-cleaning water-based coating composition which comprises (a) an aqueous silicone emulsion or the like, (b) photocatalyst particles or a photocatalyst sol, and (c) water, wherein the amount of the ingredient (b) on a solid basis is less than 5 wt.% of all solid components of the coating composition. Further provided is a self-cleaning water-based coating composition which comprises (a) an aqueous silicone emulsion or the like, (b) whiskers or the like, (c) photocatalyst particles, (d) an inorganic coloring pigment, and (e) water. |