Goniochromatic luster pigments with silicon-containing coating

US5763086A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Oct 9, 1996
• Grant date: Jun 9, 1998
• Expiry date: Oct 9, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• 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 nonselectively absorbing, silicon-containing layer which 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, are useful for coloring paints, inks, including printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations.