Coating materials, method for their production and use of said materials

A coating material comprising:

• (A) at least one hydroxyl-containing (meth)acrylate (co)polymer having a hydroxyl number of from 100 to 250 mg KOH/g, an acid number of from 0 to 35 mg KOH/g, a number-average molecular weight Mn of from 1,200 to 20,000 daltons, and a glass transition temperature of not more than +70° C.,
• (B) at least one carbamate- and hydroxyl-functional compound having a hydroxyl number of from 10 to 150 mg KOH/g, a carbamate equivalent weight CEW of from 250 to 700 g/equivalent and an equivalents ratio of hydroxyl to carbamate groups of from 1:20 to 1:0.5,
• (C) at least one amino resin, and
• (D) at least one compound of the general formula
• in which the variable R stands for an alkyl group having 1 to 12 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms or an aryl group having 6 to 20 carbon atoms and the variable X stands for a nitrogen, oxygen or sulfur atom;
• where
• (I) at least 10 equivalent % of the hydroxyl groups present in the (meth)acrylate (co)polymers (A) and/or the compounds (B) are primary hydroxyl groups and
• (II) the coating material, after it has been cured, has a storage modulus E′ in the rubber-elastic range of at least 1.5*107 Pa, the storage modulus E′ having been measured by dynamic mechanical thermoanalysis (DMTA) on homogeneous free films with a thickness of 40±10 μm.