Patent ID: 9096762
Filing Date: 2015-08-04
Classification: B82Y,C01P,C09C,C09D,D21H

Abstract:
1. A method for the surface treatment of titanium dioxide particles, comprising the steps of a) Providing an aqueous suspension of titanium dioxide pigment particles; b) Precipitating one or more inorganic compounds, selected from the group consisting of oxides and sulfates of silicon, aluminum, zirconium, titanium and mixtures thereof, from a second aqueous solution by mixing at least two components in aqueous solution and appropriate control of pH value and/or temperature in a separate vessel to form a suspension of a precipitation product, where the precipitation product consists of agglomerates of fine primary particles and/or of single crystals; c) Adding the suspension containing the precipitation product to the aqueous suspension of titanium dioxide pigment particles such that the precipitation product adsorbs on the titanium dioxide particles in the form of non-continuous discrete flocs.