Goniochromatic luster pigments based on transparent, nonmetallic, platelet-shaped substrates

US5958125A · kind A · utility

Inventors

• Raimund Schmid · Neustadt, DE
• Norbert Mronga · Dossenheim, DE

Key dates

• Filing date: Jul 5, 1996
• Grant date: Sep 28, 1999
• Expiry date: Jul 5, 2016

Classification

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

Abstract

Goniochromatic luster pigments based on multiply coated, high refractive, nonmetallic, platelet-shaped substrates which are at least partially transparent to visible light, comprising at least one layer packet of PA1 A) a colorless coating having a refractive index n.ltoreq.1.8 and PA1 B) a reflecting, selectively or nonselectively absorbing coating which is at least partially transparent to visible light, and also, if desired, additionally PA1 C) an outer protective layer, and their use for coloring paints, inks, including printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations.