COMPOSITE finely divided titanium dioxide, and a composition containing finely divided COMPOSITE BASED ON TITANIUM DIOXIDE

摘要

FIELD: chemistry.;SUBSTANCE: invention can be used in cosmetic industry when producing preparations which protect the skin from UV radiation. The finely dispersed titanium dioxide-based composite contains finely dispersed titanium dioxide particles which are combined with one or more polymers containing constituent monomers in form of carboxylic acid and/or a carboxylic acid derivative represented by the formula , where R is a C₁-C₁₅ alkenyl group, wherein hydrogen atoms can be substituted with a carboxyl group or a hydroxyl group; and X is a hydrogen atom or an alkali metal or a polyoxyethylene or polyoxypropylene group with 1-12 bonded moles. The average peak width of the maximum diffraction intensity assigned to titanium dioxide crystals is 2.0° or less in X-ray powder diffraction analysis.;EFFECT: invention increases transparency and stability of finely dispersed titanium dioxide-based composite, UV radiation absorption capacity thereof and re-dispersion capacity thereof.;11 cl, 9 tbl, 12 ex