GOLDFARBENE FARBGLANZPIGMENTE.

摘要

(A) Gloss pigments, based on flake substrates (esp. mica or metal oxide-coated mica) coated with a metal oxide layer contg. both Ti and Fe, are claimed, the novelty being that the metal oxide layer is pseudobrookite pref. of compsn. (Fe2O3)x.(TiO2) (x is 0.75-1.5). (B) Also claimed is prodn. of gloss pigments by coating flake substrates (e.g. glass, mica or metal oxide-coated mica) with an Fe- and Ti-contg. metal oxide layer and then firing, the novelty being that an aq. suspension of the flake substrates is contacted at 50-100 deg.C and pH 2-6 simultaneously with an aq. Fe(III) salt soln., an aq. Ti(IV) salt soln. and a base while maintaining the pH constant, the Fe/Ti mol. ratio being 1.5-2.5.