Process for Grinding Minerals in Aqueous Dispersion Using A Dispersing Agent Comprising Homopolymers and/or Copolymers of (Meth)Acrylic Acid

The process of the present invention produces an aqueous dispersion of mineral materials, suitable for use in pigments and other coatings, by introducing a fully neutralized dispersing agent to an aqueous dispersion of coarse mineral materials, grinding the aqueous dispersion and, during grinding, a...

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Bibliographische Detailangaben
Hauptverfasser:	MANNA, JOSEPH, SANTOS, DANIELE CRISTINA, KRASNANSKY, ROBERT, CREAMER, MARIANNE P
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMISTRY DYES INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING NATURAL RESINS PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATION OF CARBON BLACK TRANSPORTING TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	The process of the present invention produces an aqueous dispersion of mineral materials, suitable for use in pigments and other coatings, by introducing a fully neutralized dispersing agent to an aqueous dispersion of coarse mineral materials, grinding the aqueous dispersion and, during grinding, adding a partially neutralized dispersing agent to the aqueous dispersion. The process of the present invention produces aqueous dispersions of very fine particles, having a solids content of at least 75% by weight, based on the total weight of the aqueous dispersion, and wherein 95% or more of the particles are below 2 microns.