Multiply coated metallic luster pigments

US5624486A · kind A · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Aug 30, 1994
• Grant date: Apr 29, 1997
• Expiry date: Aug 30, 2014

Classification

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

Abstract

Luster pigments based on multiply coated plateletlike metallic substrates comprising A) a first layer consisting essentially of silicon oxide, aluminum oxide and/or aluminum oxide hydrate, B) a second layer consisting essentially of metal and/or nonselectively absorbing metal oxide, and C) if desired, a third layer consisting essentially of colorless or selectively absorbing metal oxide.