Methods of preparing encapsulated pigments

US4874433A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Akos Kiss · Alzenau, DE
• Peter Kleinschmit · Hanau, DE
• Juergen Hanich · Frankfurt, DE
• Guenter Halbritter · Rodenbach, DE
• Jenny Horst · Gelnhausen, DE

Key dates

• Filing date: Jun 3, 1988
• Grant date: Oct 17, 1989
• Expiry date: Jun 3, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2002/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Encapsulation pigments comprising chromophoric particles embedded in glaze-stable casings are prepared by means of calcination from the appropriate initial products. High yields and strong color intensities are obtained if the chromophoric substance or its initial compounds are bound in and/or to a zeolite and are calcined in this form with the remaining constituents.