Pearlescent pigments coated with mixed inorganic/organic layers and method for the production thereof

US8980976B2 · kind B2 · utility

Assignee

• ECKART GmbH · DE

Inventors

• Frank Henglein · Nuremberg, DE
• Stefan Trummer · Koblenzer Straße, DE
• Ulrich Schmidt · Flörsheim, DE
• Günter Kaupp · Jessenitz Siedlung, DE
• Peter Kruger · Lübeck, DE

Key dates

• Filing date: Feb 22, 2007
• Grant date: Mar 17, 2015
• Expiry date: Nov 27, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09C2220/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to platelet-shaped pearlescent pigments that are coated with at least one mixed inorganic/organic layer for improving their application properties, and of these, particularly their mechanical properties, and to methods for the production thereof and to the use thereof. The said mixed inorganic/organic layer comprises at least one at least partially crosslinked inorganic metal-oxide component and an organic component. The organic component is at least one organic oligomer and/or polymer, which is covalently bonded, at least in part, to the inorganic network via network formers, wherein the coating comprises at least one mixed inorganic/organic layer, which mixed layer comprises, at least in part, an inorganic network having one or more inorganic oxide component(s) and at least one organic component, the organic component being, at least in part, an organic oligomer and/or polymer covalently bonded, at least in part, to the inorganic network via one or more organic network formers.The invention also relates to a method for the production of such pearlescent pigments.