CALCITE TYPE CALCIUM CARBONATE FILLER AND MANUFACTURE

1. Calcitic calcium carbonate filler in needle, fibre and/or rod form, having a specific BET surface area of 15-200 m**2 /g, an average shape factor of > 5 and having a phosphate content of 2.5-25% by weight, calculated as PO4-3- and based on calcium carbonate, and prepared by precipitation of an...

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Bibliographische Detailangaben
Hauptverfasser:	HAINRITSUHI HOPUFU, HERUBERUTO ETSUKU, RAINHARUTO YUIRA
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS CONCRETE DYES INORGANIC CHEMISTRY LIME, MAGNESIA METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES PREPARATION OF CARBON BLACK REFRACTORIES SLAG THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES TREATMENT OF NATURAL STONE USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	1. Calcitic calcium carbonate filler in needle, fibre and/or rod form, having a specific BET surface area of 15-200 m2 /g, an average shape factor of > 5 and having a phosphate content of 2.5-25% by weight, calculated as PO4-3- and based on calcium carbonate, and prepared by precipitation of an aqueous 3-25% strength by weight calcium hydroxide suspension using carbon dioxide, if appropriate mixed with air or nitrogen, at temperatures of from 0-25 degrees C, where 3-25% by weight, based on the calcium hydroxide employed, of PO4-3- being added in the form of Ha Me3-a PO4 (a = 0-3; Me = H, NH4-+ (a Not= 0), Na+ , or K**+ ) before commencement of the pH decrease, thorough mixing being ensured during the entire reaction, and, if appropriate, the finished product, being dried and/or coated in a known manner.