Method for the production of dyestuff pastes

US6980292B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Claudia Sierakowski · Seeheim-Jugenheim, DE
• Ines Mangels · Hachenburg, DE
• Zenon Paul Czornij · Brighton, US
• Thomas Krüger · Leverkusen, DE
• Peter Hoffmann · Senden, DE
• Thomas Frey · Brighton, US
• Benno Sens · Neustadt, DE
• Manfred Mielke · Heidelberg, DE
• Paul Gunthert · Schifferstadt, DE
• Gerhard Berger · Stuttgart, DE
• Peter Blaschka · Ludwigshafen, DE
• Gunter Etzrodt · Stuttgart, DE

Key dates

• Filing date: Nov 22, 2002
• Grant date: Dec 27, 2005
• Expiry date: Dec 13, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D17/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method of producing color pastes, in which a component comprising colorant particles is dispersed in a binder. In the method of the invention the dispersing operation is controlled by beaming excitational light of a defined wavelength range into a mixture of the component comprising colorant particles and the binder, detecting the light transmitted, reflected and/or scattered by the mixture and determining a sample spectrum, evaluating the sample spectrum and hence determining parameters of the color paste, and monitoring changes in the sample spectrum over time and terminating the dispersing operation when predetermined target parameters are attained.