Polyurethane coating material composition, multi-stage coating methods

US9644111B2 · kind B2 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Peter Hoffmann · Senden, DE
• Matthijs Groenewolt · Hachenburg, DE
• Benedikt Schnier · Warendorf, DE
• Elke Westhoff · Steinfurt, DE

Key dates

• Filing date: May 29, 2013
• Grant date: May 9, 2017
• Expiry date: Oct 9, 2033

Classification

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

Abstract

Described are nonaqueous coating material compositions comprising (A) at least one polyhydroxyl group-containing compound, (B) at least one polyisocyanate group-containing compound having free or blocked isocyanate groups, (D) at least one catalyst (D) based on a zinc-amidine complex which is preparable by reacting one or more zinc(II) biscarboxylates with an amidine of the formula (I) or with a mixture of two or more amidines of the formula (I)and (S) at least one monomeric aromatic optionally substituted carboxylic acid (S) whose carboxyl group is in conjugation with a π-electron system, wherein the component (B) comprises at least one structural unit —NR—(X—SiR″x(OR′)3-x) (II), and/or at least one structural unit —N(X—SiR″x(OR′)3-x)n(X′—SiR″y(OR′)3-y)m (III). Also described are multistage coating methods, and the use of the coating material compositions.