| abstract |
The purpose of this invention is the use of a combination of at least one homopolymer and/or at least one copolymer of (meth)acrylic acid and/or at least one phosphate compound, and/or at least one cationic polymer, and at least one compound carrying fluoride ions, as a dispersing agent in order to disperse mineral materials containing precipitated calcium carbonate (PCC) in water. Another purpose of the invention lies in aqueous suspensions of mineral materials containing PCC thus obtained, and in dry pigments obtained by drying said suspensions. A final purpose of the invention lies in the use of the suspensions and dry pigments mentioned above in manufacturing of paper, and particularly in the formulation of paper coating slips and in manufacturing of paper sheet, and manufacturing of paints, plastics and rubbers. |