Method for preparing double silica titania complex powders having an excellent scattered reflection effect

摘要

PURPOSE: A process of preparing double silica-titania composite powders by allowing silica to support titanium dioxide and then coating the surface of the silica with titanium oxide is provided. Whereby, the composite powders are excellent in irregular reflection and low in hiding power and can be used in a make-up product, ultraviolet screening products, etc.. CONSTITUTION: Silica is allowed to support a large amount of titanium dioxide by the reaction of silica, titanium alkoxide and an aqueous alcohol solution to produce a silica-titania composite carried with titanium dioxide, which is reacted with titanium chloride and the aqueous alcohol solution to produce silica-titania composite powder, which are surface-modified with silicon oil or a fatty acid soap to produce the double silica-titania composite powder.