Polyurethane coating material composition, multistage coating methods using these coating material compositions, and also the use of the coating material composition as clearcoat material and pigmented coating material, and application of the coating method for automotive refinish and/or for the coating of plastics substrates and/or of utility vehicles

US9139751B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Elke Westhoff · Steinfurt, DE
• Peter Hoffmann · Senden, DE
• Bernadette Moeller · Reken, DE
• Benedikt Schnier · Warendorf, DE

Key dates

• Filing date: Jan 30, 2012
• Grant date: Sep 22, 2015
• Expiry date: Jan 30, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/22
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Disclosed are coating material compositions comprising at least one polyhydroxyl group-containing compound (A), at least one polyisocyanate group-containing compound (B) having free and/or blocked isocyanate groups, at least one catalyst (D) based on a zinc-amidine complex which comprises the reaction product of 1.0 moles of at least one zinc(II) biscarboxylate with more than 2.0 moles of at least one amidinewhere R5=hydrogen and R1, R2, R3, and R4 are each identical or different radicals, R1 and R3 being hydrogen or an alkyl radical or an aryl radical, and R2 and R4 being an alkyl radical or an aryl radical, and at least one monomeric aromatic, optionally substituted carboxylic acid (S) whose carboxyl group is in conjugation with a π-electron system.