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

摘要

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 amidine;;where 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.

主权项

1. A coating material composition 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 one or more zinc(II) biscarboxylates with more than 2.0 moles of an amidine of the formula (I) or with more than 2.0 moles of a mixture of two or more amidines of the formula (I) where R5=hydrogen and R1, R2, R3, and R4 are each identical or different radicals, R1 and R3 being selected from the group consisting of hydrogen, an alkyl radical, and 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.