TITANIUM DIOXIDE CONTAINING AND CARBONATE CONTAINING COMPOSITE PIGMENTS AND METHOD FOR PRODUCING SAME

摘要

The invention relates to the production of pigment containing composite pigment particles and to the use thereof in order to improve the pigment light scattering efficiency in coatings plastics and laminate. The composite pigment particles contain titanium dioxide pigment particles at least one inorganic and/or organic filler as an extender and calcium carbonate which is precipitated in the process. The filler is preferably selected from the group consisting of Ca Ca Mg and Mg carbonates natural and synthetic silicon dioxide and oxides. The composite particles are produced in a combined process consisting of precipitation and dispersion. The use of the composite pigment particles according to the invention said particles consisting of fillers and titanium dioxide pigment allows the use of less pigment without or with only a low loss of optical properties depending on the selected combination. Alternatively even greater values can be achieved with respect to tinting strength for example when the same pigment content is used. In particular a part or all of the TiO content in the user system can be replaced with the composite pigment particles according to the invention.