Aqueous coating compositions pigmented with flake-form metallic effect pigments, processes for preparing them and use thereof for producing multicoat paint finish

US9249316B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Stephen Schwarte · Emsdetten, DE
• Ulrich Uekötter · Hachenburg, DE
• Peter Sonntag · Munich, DE
• Norbert Low · Neustadt an der Aisch, DE
• Elke Roehr · Höchberg, DE

Key dates

• Filing date: Feb 18, 2011
• Grant date: Feb 2, 2016
• Expiry date: May 25, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed are curable aqueous coating compositions comprising at least one polyurethane (A) as binder, at least one laminar metallic effect pigment (B), and at least one inorganic thickener C1) selected from the group of the phyllosilicates, and at least one organic thickener C2) selected from the group of the (meth)acrylic acid-(meth)acrylate copolymer thickeners and polyurethane thickeners, where the amount of B), based on the total binder content of the coating material composition is >9% by weight, the total solids based on the coating material composition is between 12.5% and 17% by weight, the total amount of the thickeners C1 and C2), based on the total binder content of the coating composition is <12.5% by weight, the weight ratio of C2) to C1) is >0.4, and the amount of B), based on the coating material composition, is between 1.2 and 2.3% by weight.