Phosphonic acid ester containing two-component coating system, their preparation and use thereof

The present invention, one or more polyisocyanates as components (a), as component (b), to react with components (a), one or more oligomeric and / or polymeric compounds, as component (c), the diester phosphonate and one or more phosphonic acid ester selected from the group consisting of diphosphonic diesters, or a two-component coating system, (i) all of the oligomer component (b) can react with component (a) and / or comprises a polymer compound, present in the two-component coating system, the (ii) component (b), with respect to the total weight of components (b), of 15 mass% or less, an amino group capable of reacting with an isocyanate including oligomeric and / or polymeric compounds, related to the two-component coating systems. A further object of the present invention is a method for producing a two-component coating system, clear coat, in particular, as a clearcoat in automotive multilayer coating, the use of the coating systems.