TITANIUM DIOXIDE PIGMENT FEATURING GREAT OPACITY, AND METHOD FOR THE PRODUCTION THEREOF

摘要

The invention relates to a rutile titanium dioxide pigment to be used in decorative paper that is provided with greater opacity compared to prior art as well as a method for the production thereof. The inventive pigment comprises a coating containing aluminum phosphate, aluminum oxide, silicon oxide, and titanium oxide while containing no significant amounts of a zirconium compound. The silicon oxide is loosely precipitated, the specific surface according to BET amounting to at least 15 m/g. The inventive production method is characterized in that an aluminum component and a phosphorus component are initially added to a TiOsuspension, whereupon an alkaline silicon component, an acidically reacting titanium component, and an optional additional pH-regulating component are added, the pH value being adjusted to a value ranging from 4 to 9.