A METHOD FOR IMPROVING RHEOLOGICAL PROPERTIES OF AN AQUEOUS PIGMENT SLURRY AND A DISPERSION AGENT

The invention relates to a method for improving rheological properties of an aqueous pigment slurry. In the method dispersion agent is added to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added. The dispersion agent com...

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Bibliographische Detailangaben
Hauptverfasser:	HEISKA, PERTTU, HUHTALA, KIMMO, AARNI, ESKO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PREPARATION OF CARBON BLACK TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention relates to a method for improving rheological properties of an aqueous pigment slurry. In the method dispersion agent is added to an aqueous phase of a slurry comprising pigment particles or to the aqueous phase into which the pigment particles are to be added. The dispersion agent comprises styrene acrylate copolymer. The invention relates also to dispersion agent for a pigment slurry comprising a first component comprising styrene acrylate copolymer and a second component comprising a conventional dispersion agent such as a straight-chain polyacrylate. Linvention a trait à un procédé damélioration des propriétés rhéologiques dune suspension aqueuse de pigments. Dans le procédé, un agent de dispersion est ajouté à une phase aqueuse dune suspension comprenant des particules pigmentaires ou à la phase aqueuse à laquelle les particules pigmentaires doivent être ajoutées. Lagent de dispersion comprend un copolymère styrène/acrylate. Linvention concerne également un agent de dispersion pour une suspension pigmentaire comprenant un premier composant comportant un copolymère styrène/acrylate et un deuxième composant comprenant un agent de dispersion classique tel quun polyacrylate à chaîne droite.