Abstract: The invention relates to a process for painting substrates comprising the following steps: 1. applying a coating composition to an optionally pre-coated substrate and 2. hardening the applied coating composition, wherein the coating composition comprises: A) at least one binder having functional groups containing active hydrogen, B) at least one polyisocyanate cross-linking agent having free isocyanate groups and C) at least one urethane compound having at least two —O—CO—NH— groups, wherein the urethane compound is substantially free from functional groups which are capable of entering into a cross-linking reaction with components A) and/or B) and wherein the hardening is carried out under conditions such that the component C) does not contribute to the cross-linking of the applied coating composition by chemical reaction.

Abstract: The present invention relates to isocyanate-curing two-component coating compositions containing urethane compounds having at least two —O—CO—NH-groups. The invention relates to coating compositions comprising A) at least one binder having functional groups containing active hydrogen, B) at least one polyisocyanate crosslinking agent having free isocyanate groups and C) at least one urethane compound having at least two —O—CO—NH-groups, wherein the urethane compound has a number-average molecular mass Mn of from 400 to 5,000 and is substantially free from functional groups which are capable of entering into a crosslinking reaction with components A) and/or B). Preferred urethane compounds C) are obtained by reacting polyisocyanate compounds with monohydroxy compounds.

Abstract: The invention is directed to a process for the production of a multi-layer coating comprising the following steps: A) applying a base coat layer of a pigmented color-imparting and/or special effect-imparting base coat composition onto a substrate precoated with at least one coating layer, B) applying a coating layer of a coating composition curable by means of high-energy radiation, wherein the coating composition comprises at least one oligomeric and/or polymeric binder curable by means of high-energy radiation and does contain low molecular weight reactive diluents curable by means of high-energy radiation, C) curing the coating layer applied in step B) by irradiation with high-energy radiation, D) applying a clear coat layer of a transparent clear coat composition curable by means of high-energy radiation which comprises low molecular weight reactive diluents curable by means of high-energy radiation and E) curing the clear coat layer applied in step D) by irradiation with high-energy radiation.

Abstract: A process for repairing a vehicle coating, comprising the following steps: I) applying a UV radiation coating composition onto a coated vehicle or vehicle part, having a blemished area on the coated surface to be repaired, wherein the coating composition comprises A) at least one free-radically polymerizable oligomeric and/or polymeric binder containing olefinically unsaturated groups, B) optionally, at least one free-radically polymerizable monomeric reactive diluent containing one or more olefinically unsaturated groups, C) at least one photoinitiator, D) at least one metal compound of a metal salt containing the metal in the cation and/or anion of the compound, organometallic compounds, metal coordination compounds and mixtures thereof, wherein the metal is from groups 13-14 of the periodic system of elements and a transition metal, and is able to occur in at least 2 oxidation states other than zero and E) optionally, water, organic solvents, pigments, fillers and/or conventional coating additives, and