C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
C09C 1/02 (2006.01) B01F 3/12 (2006.01) C08K 3/26 (2006.01) C09C 3/04 (2006.01) D21H 17/67 (2006.01) D21H 17/69 (2006.01) D21H 19/38 (2006.01)
Patent
CA 2636474
The present invention consists in a process for preparing at least one mineral material and/or at least one pigment, comprising a calcium carbonate made both partially organophilic and partially hydrophilic, wherein the carbonate is mixed and/or ground and/or concentrated in aqueous medium in the presence of at least one salt of ethylene acrylic acid, a dispersant and/or grinding aid being introduced before and/or during this treatment step. Another subject of the invention lies in the resulting dispersions and aqueous suspensions of calcium carbonate. They may be dried, and the dry pigments obtained likewise constitute a subject of the invention. The use of these aqueous dispersions and of these dry pigments in the field of plastics, paints and paper constitutes another subject of the invention.
La présente invention consiste en un procédé de préparation d'au moins une matière minérale et / ou d'au moins un pigment, comprenant un carbonate de calcium rendu à la fois partiellement organophile et partiellement hydrophile, dans lequel le carbonate est mélangé et / ou broyé et / ou concentré en milieu aqueux, en présence d'au moins un sel de l'acide éthylène acrylique, un agent dispersant et / ou d'aide au broyage étant introduit avant et / ou pendant cette étape de traitement. Un autre objet de l'invention réside dans les dispersions et les suspensions aqueuses de carbonate de calcium ainsi obtenues. Elles peuvent être séchées et les pigments secs obtenus constituent aussi un objet de l'invention. L'utilisation de ces dispersions aqueuses et de ces pigments secs dans le domaine du plastique, des peintures et du papier constitue un autre objet de l'invention.
Buri Matthias
Burkhalter Rene
Gane Patrick
Hunziker Philipp
Karth Beat
Borden Ladner Gervais Llp
Omya Development Ag
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