SURFACE COATING METHOD OF TITANIUM DIOXIDE FOR PIGMENT FOR PRECIPITATING AND FORMING CRYSTALLINE ALUMINA HYDRATE ON PARTICLE SURFACE

PROBLEM TO BE SOLVED: To provide a surface coating method of titanium dioxide for a pigment for uniformly and densely precipitating and forming hydrargillite AlO-3HO of crystalline alumina hydrate on a surface of a titanium dioxide particle.SOLUTION: In order to uniformly and densely precipitate and...

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Bibliographische Detailangaben
Hauptverfasser:	TAMANOI HIDEO, SHIMIZU TOSHIRO, IKEDA KIYOKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F DYES INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES PREPARATION OF CARBON BLACK TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a surface coating method of titanium dioxide for a pigment for uniformly and densely precipitating and forming hydrargillite AlO-3HO of crystalline alumina hydrate on a surface of a titanium dioxide particle.SOLUTION: In order to uniformly and densely precipitate and form crystalline alumina hydrate on the surface of the titanium dioxide particle, dispersion liquid of titanium dioxide slurry containing a titanyl ion and sodium aluminate is kept at a temperature of equal to or lower than 40°C, and a hydrolytic rate of sodium aluminate is adjusted without generating the alumina hydrate in a liquid part, and the crystalline alumina hydrate can therefore be uniformly and densely precipitated and formed on the surface of the titanium dioxide particle.