SiO2 coated pearlescent pigments

The invention relates to pearlescent pigments comprising platelet-shaped substrate, comprising metal oxide, and protective layer, said metal oxide having a refractive index of more than 1.8, where the protective layer is composed of an organic chemically surface modified SiO2 layer, the organic chem...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SCHMIDT ULRICH, HENGLEIN FRANK
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DYES LIME, MAGNESIA METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES PREPARATION OF CARBON BLACK REFRACTORIES SLAG TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	The invention relates to pearlescent pigments comprising platelet-shaped substrate, comprising metal oxide, and protective layer, said metal oxide having a refractive index of more than 1.8, where the protective layer is composed of an organic chemically surface modified SiO2 layer, the organic chemical surface modification being applied on the SiO2 layer. The invention further relates to a process for preparing these pearlescent pigments and to their use.