Mixing system for producing aqueous coating agents with a low VOC

US12234381B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Alexandra Steffens · Munster, DE
• Bernhard Lettmann · Drensteinfurt, DE
• Josef Rademacher · Beverly Hills, US
• Peter Hoffmann · Senden, DE

Key dates

• Filing date: Jul 15, 2020
• Grant date: Feb 25, 2025
• Expiry date: Dec 13, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Described herein is a mixer system for producing aqueous coating materials from at least one aqueous pigment paste A, including at least one color pigment, and at least one pigment-free component B, including an aqueous, acrylate-based microgel dispersion having a glass transition temperature Tg of 50 to 60° C., where both the aqueous pigment paste A and the component B each have a VOC value of less than or equal to 250 g/L. Further described herein is a method for producing aqueous coating materials having a VOC content of 0 to 250 g/L, in which the individual components A and B are stored separately and not mixed until shortly before application, to give the aqueous coating material. Further described herein is a method of using the mixer system for producing aqueous coating materials for refinishing and/or for coating automobile bodies and/or plastics parts.