Composition of a polyurethane coating agent, multi-stage coating process using those compositions of a coating agent, as well as the use of the composition of a coating agent such as transparent varnish and pigmented lacquer, as well as application of the coating process for car repair lacquering and / or for coating plastic substrates and / or utility vehicles

摘要

Composition of a coating agent containing at least one compound (A) containing polyhydroxyl groups, at least one compound (B) containing polyisocyanate groups with free and / or blocked isocyanate groups, at least one catalyst (D) based on a zinc-amidine complex, which can be produced by reacting 1.0 mol of one or more zinc (II) bis-carboxylates with 0.1 to 1.8 mol of an amidine of the formula ( I) or with 0.1 to 1.8 moles of a mixture of two or more amidines of formula (I) ** Formula ** where R5 = hydrogen and R1, R2, R3, and R4 are respectively equal radicals or different, where R1 and R3 are hydrogen or an alkyl radical or an aryl radical and R2 and R4 are an alkyl radical or an aryl radical, and at least one possibly substituted aromatic monomeric carboxylic acid (S), the carboxyl group of which is in conjugation with a system of π - electrons.