C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
C09C 1/02 (2006.01) C01F 11/18 (2006.01) C09C 3/04 (2006.01) D21H 17/00 (2006.01) D21H 19/00 (2006.01)
Patent
CA 2613325
It is an object of the present invention to provide a process of manufacturing calcium carbonate-containing slurries, wherein said calcium carbonate- containing slurries are prepared by adding one or more zirconium compounds, and possibly one or more further phosphate-free additives acting as dispersing and / or grinding aid agents. An other object of the invention lies in calcium carbonate-containing slurries thus obtained, and dry calcium carbonate mineral pigments resulting from the drying of such slurries. A further object of the invention is the use of such slurries and such dry mineral pigments in paper manufacturing, plastic coatings, as fillers for plastics or for aqueous paint compositions and the like. Papers, paints and plastics containing such slurries and such dry pigments are also an object of the present invention.
La présente invention a trait à un procédé de fabrication de suspensions contenant du carbonate de calcium, dans lequel les suspensions contenant du carbonate de calcium sont préparées par l'addition d'un ou de plusieurs composés à base de zirconium, et éventuellement un ou des additifs supplémentaires exempts de phosphate agissant comme agents de dispersion et/ou de broyage. L'invention a également trait à des suspensions contenant du carbonate de calcium ainsi obtenues, et des pigments minéraux de carbonate de calcium obtenus par le séchage desdites suspensions. L'invention a trait en outre à l'utilisation de telles suspensions et de tels pigments minéraux séchés dans la fabrication de papier, de revêtements en matière plastique, en tant que charges pour la matière plastique ou pour des compositions de peinture aqueuses et analogues. L'invention a trait enfin à des papiers, peintures et matières plastiques contenant de telles suspensions et de tels pigments secs.
Buri Matthias
Kaessberger Michael
Schoelkopf Joachim
Omya Development Ag
Robic
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