Improved process for the manufacture of organosilicon compound-treated pigments, and coating compositions employing the same

An improved process is provided for making organosilicon compound surface-treated titanium dioxide pigments, involving aqueous treatment with alkyltrialkoxysilanes and dialkyldialkoxysilanes at mildly acidic pH values and in the presence of a monoprotic acid, and using heat from spray drying a high...

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Bibliographische Detailangaben
Hauptverfasser:	ELLIOTT, JEFFREY D, KIDDER, MICHAEL E, CRAIG, DANIEL H, RAY, HARMON E, PERAKIS, GEORGE A, WESTMEYER, MARK D
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PREPARATION OF CARBON BLACK TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	An improved process is provided for making organosilicon compound surface-treated titanium dioxide pigments, involving aqueous treatment with alkyltrialkoxysilanes and dialkyldialkoxysilanes at mildly acidic pH values and in the presence of a monoprotic acid, and using heat from spray drying a high solids dispersion of filter cake and optionally from micronization as well to effectively promote the desired bounding of the alkyltrialkoxysilane and dialkyldialkoxysilane surface treatments with the pigment surface and thereby reduce the manufacturing cycle time for the pigments to a commercially practical cycle time. Further, improved gloss and tint strength aqueous coating compositions are provided comprising water, a film-forming component and ccrtain of these same alkyltrialkoxysilane and dialkyldialkoxysilane surface treated titanium dioxide materials.