Abstract: The invention relates to a method for producing surface-modified inorganic fillers or pigments of a desired particle size. Said method is characterized 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.

Abstract: The invention relates to a process for the preparation of coating dispersions for use in the paper industry by co-grinding natural calcium carbonate (GCC) and precipitated calcium carbonate (PCC), characterized in that powdery GCC is co-ground with a slurry containing from 5 to 70% by weight of PCC to obtain a particle size distribution of the calcium carbonate with at least 90% by weight of smaller than 5 ?m, at least 70% by weight of smaller than 2 ?m, and at least 20% by weight of smaller than 1 ?m, with a weight average particle size within a range of from 0.7 to 3 ?m.

Abstract: The invention relates to a process for the preparation of coating dispersions for use in the paper industry by co-grinding natural calcium carbonate (GCC) and precipitated calcium carbonate (PCC), characterized in that powdery GCC is co-ground with a slurry containing from 5 to 70% by weight of PCC to obtain a particle size distribution of the calcium carbonate with at least 90% by weight of smaller than 5 ?m, at least 70% by weight of smaller than 2 ?m, and at least 20% by weight of smaller than 1 ?m, with a weight average particle size within a range of from 0.7 to 3 ?m.

Abstract: The core of the present invention resides in supplying pigment in a kind of “basic grade”, preferably as a solid, and milling in an aqueous phase in situ in a satellite milling plant to obtain the desired whiteness and grain size. As a result of this invention, papermakers are no longer bound to predetermined particle sizes of the fresh pigments and/or fresh fillers and pigment slurries obtainable from suppliers of raw materials. Papermakers are capable of preparing themselves pigment slurries in a satellite plant in situ according to the current needs. This permits a flexible and quick reaction to changing quality and production requirements, as well as lower shipping costs because no water is shipped as would be necessary in the usual slurry, and an improved stability of the self-prepared pigment slurry, as compared to the prior art.

Abstract: The present invention relates to a process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard found in the residual water sludges from coating plant waste waters, deinking plants, internal water treatment plants or separators, and to the use of a thus obtained pigment slurry for the preparation of a coating compound for the paper industry or in the paper stock for papermaking. An essential element of the invention is a process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard found in the residual water sludges from coating plant waste waters, deinking plants, internal water treatment plants or separators, characterized in that the residual water sludges containing the fillers and coating pigments are subjected to mixing and then milling together with fresh pigments or fresh fillers in the form of powders, fresh-pigment containing slurries and/or fresh-filler containing slurries to yield a pigment slurry.

Abstract: The present invention relates to a process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard found in the residual water sludges from coating plant waste waters, deinking plants, internal water treatment plants or separators, and to the use of a thus obtained pigment slurry for the preparation of a coating compound for the paper industry or in the paper stock for papermaking. An essential element of the invention is a process for recycling fillers and coating pigments from the preparation of paper, paperboard and cardboard found in the residual water sludges from coating plant waste waters, deinking plants, internal water treatment plants or separators, characterized in that the residual water sludges containing the fillers and coating pigments are subjected to mixing and then milling together with fresh pigments or fresh fillers in the form of powders, fresh-pigment containing slurries and/or fresh-filler containing slurries to yield a pigment slurry.