| abstract |
An aqueous dispersion containing oxide particles produced by pyrolysis of titanium, zinc, iron or cerium having an average particle size of less than 250 nm expressed as a median value in the dispersion, the oxide in the dispersion The particle size of the particles is not symmetrically distributed and the dispersion serves as a dispersant as at least one compound of general formula I and / or at least one copolymer of general formula IIa and / or of general formula IIb An aqueous dispersion characterized in that it contains at least one copolymer. The dispersion is produced by dispersing a pre-dispersion stream with a high energy mill. The dispersion can be used in a sunscreen formulation. |