| abstract |
In the present invention, the metal is selected from the group consisting of aluminum, cerium, iron, titanium, zinc and zirconium, and the surface modification contains 1 to 99 mol% of N-vinylamide N-vinylpyrrolidone as monomer A) and B) as It contains 99 to 1 mol% of α, β-ethylenically unsaturated double bonds which can be polymerized by the free radical mode and one monomer containing one anionic and / or anionic group per molecule, and containing monoethylenically unsaturated C 3- C 8 -C 30 -alkyl esters of C 8 -carboxylic acids, N-alkyl substituted or N, N-dialkyl substituted amides of acrylic acid or methacrylic acid with C 8 -C 18 alkyl radicals, or aliphatic C To a surface modified nanoparticulate metal oxide, characterized in that it comprises a coating with copolymer P which should not contain further monomers selected from the group consisting of vinyl esters of 8- C 30 -carboxylic acids. It is about.n n n Nanoparticulate Metal Oxides, Cosmetics, Sunscreens, N-Vinylamide, Zinc Oxide |