DISPERSION, COATING AND RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide an aqueous dispersion containing metal oxide powder and/or metalloid oxide powder in an amount of 20 to 80 wt.%. SOLUTION: This stable aqueous is characterized in that the metal oxide powder and/or the metalloid oxide powder are contained in the dispersion in the for...

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Bibliographische Detailangaben
Hauptverfasser:	SCHARFE THOMAS, LORTZ WOLFGANG DR, BATZ-SOHN CHRISTOPH DR
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COLOUR PRINTING CORRECTING FLUIDS DYES FILLING PASTES INKS LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATION OF CARBON BLACK PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL STAMPS THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an aqueous dispersion containing metal oxide powder and/or metalloid oxide powder in an amount of 20 to 80 wt.%. SOLUTION: This stable aqueous is characterized in that the metal oxide powder and/or the metalloid oxide powder are contained in the dispersion in the form of primary particle aggregates. The average diameter of the aggregates is 10 to 300 nm, and the average diameter of the primary particles is 5 to 50 nm. The powder includes at least two kinds of powder types. The powder types have the same mark surface electric charges at a prescribed pH-value of the dispersion, and have a zeta electric potential acting on a larger electrostatic repulsion than van der Waals attraction. The average diameters of the primary particles are different by at least 1.5 times between the two powder types. The average aggregate diameter of the second and other powder types in the dispersion is 60 to 150% of that of the first powder type. Each powder type is contained in an amount up to at least 1 wt.% in the dispersion. COPYRIGHT: (C)2004,JPO