Fabrication of Nano TiO2-Polymer Encapsulated Fluorescent Pigments for Weatherability Improvement of Powder Coating

Fluorescent coatings have attracted attention due to their bright colors. However, they fewer outdoor applications low stability, especially the poor weather resistance of fluorescent pigments. In order improve and maintain excellent appearance, this study used polymer binders coat a light shielding agent nano TiO2 on surface pigment extend durability. Three organic binders, polyester varnish, polyurethane polyvinyl alcohol, were selected. Each binder was dissolved mixed with pigments particles make polymer-TiO2 layer surface. The effects types loadings investigated evaluated by accelerating test corresponding powder coatings. According SEM ash test, successfully coated modified shows strong ability absorb ultraviolet rays, prepared has been significantly improved compared original coating. When using clear PE as setting ratio 1:2, UV exposure time can be extended over twelve times for same color change. This provides an effective approach enhance thus expand applications.