| abstract |
The present invention relates to a method for preparing a porous organic-inorganic composite powder, comprising depositing inorganic oxide nanoparticles in multiple layers by repeating the steps of depositing a polyphenol on a porous polymethylmethacrylate (PMMA) microsphere and depositing inorganic oxide nanoparticles on the polyphenol deposited porous polymethylmethacrylate (PMMA) microsphere, and a cosmetic composition containing the same. According to the present invention, a porous organic-inorganic composite powder can be prepared by uniformly depositing an inorganic material on the surface of a porous organic polymer support, and applying a porous organic-inorganic composite powder prepared as described above to UV protection products can prevent cohesion between particles by uniformly depositing the inorganic particles used as a UV protecting agent on a support, and thus can maintain unique and excellent properties of an inorganic UV protecting agent, as well as have an excellent UV protection effect. Also, the organic-inorganic UV protection material having a colloid form prepared according to the method of the present invention can be widely used as functional materials, such as, cosmetics, paints, etc. |