| abstract |
The present invention provides a surface-modified nanoparticle metal oxide, wherein the metal is selected from the group consisting of aluminum, cerium, iron, titanium, zinc, and zirconium. The modification is as follows: A) N-vinylamide N-vinylpyrrolidone as a monomer 1-99 mol% B) One α, β-ethylenically unsaturated polymer that can be polymerized by free radical method per molecule Surface-modified nanoparticulate metal oxide, characterized in that it comprises a coating with copolymer P containing 99 to 1 mol% of monomers containing double bonds and anionic groups and / or anionic groups Copolymer P is a monoethylenically unsaturated C 3 -C 8 -carboxylic acid C 8 -C 30 -alkyl ester, C 8 -C 18 -alkyl group-containing acrylic acid or methacrylic acid N-alkyl- Or an additional monomer selected from the group consisting of N, N-dialkyl-substituted amides or vinyl esters of aliphatic C 8 -C 30 -carboxylic acids] About. [Selection figure] None |