Goniochromatic luster pigments with aluminum coating

US5733364A · kind A · utility

Assignee

• BASF SE

Inventors

• Raimund Schmid · Neustadt, DE
• Norbert Mronga · Dossenheim, DE
• Jorg Adel · Ludwigshafen, DE

Key dates

• Filing date: Apr 25, 1996
• Grant date: Mar 31, 1998
• Expiry date: Apr 25, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2220/20
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Goniochromatic luster pigments based on multiply coated platelet-shaped metallic substrates comprising at least one layer packet of PA1 A) a layer consisting essentially of silicon oxide, silicon oxide hydrate, aluminum oxide and/or aluminum oxide hydrate, and PA1 B) a metallic layer which consists essentially of aluminum and is at least partially transparent to visible light, and also, if desired, additionally PA1 C) an outer layer which consists essentially of colorless or selectively absorbing metal oxide and/or is phosphate-, chromate- and/or vanadate-containing, are useful for coloring paints, inks, including printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations.