METAL OXIDE/SILICA COMPOSITE AND COSMETIC COMPRISING THE SAME

摘要

A metal oxide/silica composite which comprises a finely dispersed system comprising metal oxide particles having a primary particle diameter of 1 to 1000 nm and silica particles which are both dispersed in each other substantially in the state of primary particles; and a metal oxide/silica composite, characterized in that it is prepared by admixing (1) a dispersion containing a silica sol having a primary particle diameter of 1 to 150 nm and (2) a particulate metal oxide or metal oxide sol having a primary particle diameter of 1 to 1000 nm. In particular, the metal oxide/silica composite, wherein the particulate metal oxide or metal oxide sol comprises one or more of titanium oxide, zinc oxide and cerium oxide. A cosmetic comprising the above metal oxide/silica composite. The metal oxide/silica composite exhibits enhanced dispersion of the metal oxide and thus can be used for preparing an ultraviolet ray protecting powder and cosmetic which have satisfactory ultraviolet ray protecting capability and transparency.