Surface-modified inorganic fillers and pigments

C - Chemistry – Metallurgy – 09 – C

Patent

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Details

C09C 3/00 (2006.01) C09C 1/02 (2006.01) C09C 3/04 (2006.01) C09C 3/10 (2006.01) D21H 17/67 (2006.01) D21H 19/38 (2006.01)

Patent

CA 2566335

The invention relates to a method for producing surface-modified inorganic fillers or pigments of a desired particle size. Said method is characterised in that filler or pigment slurries of inorganic fillers or pigments are milled to the desired particle size under the action of compressive and shear forces using polymer dispersions, whereby the fillers and/or pigments are additionally brought into contact with conventional milling auxiliary agents and/or dispersants (active agent) in a quantity of between 0.1 and 2.0 wt. %, in relation to the fillers or pigments. The invention also relates to the fillers and pigments that are obtained by said method and to their use for producing dispersion inks, adhesives, coatings or coating compounds for the paper industry, in particular coating compounds used in various industry segments, such as sheet-fed offset printing, roll offset printing, gravure printing and for the production of cardboard and special papers.

L'invention concerne un procédé permettant de produire des charges ou des pigments inorganiques de grosseur de grain voulue, modifiés en surface, qui se caractérise en ce que des boues liquides de charges ou de pigments inorganiques sont broyées sous l'effet de forces de pression et de cisaillement, à l'aide de dispersions polymères, à la grandeur de grain voulu. Les charges et/ou les pigments sont ensuite mis en contact, avec des agents auxiliaires de broyage et/ou des dispersants (substance active) connus en soi, dans une quantité allant de 0,1 à 2,0 % en poids, par rapport aux charges ou aux pigments. L'invention concerne également les charges et les pigments ainsi obtenus et leur utilisation pour produire des peintures de dispersion, des adhésifs, des revêtements ou des pâtes de couchage pour l'industrie du papier, notamment des pâtes de couchage pour différents segments, comme l'offset à feuilles, l'offset à bobines, l'héliogravure, le carton et les papiers spéciaux.

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