High solid coating compositions

The invention relates to coating compositions comprising: A) at least one low molecular weight reactive compound with a molecular weight (Mn) of 300-1,500 g/mol, preferably of 300-1,200 g/mol, with at least one secondary and/or tertiary amino group and at least two hydroxyl groups per molecule, which compound is obtained by reacting A1) at least one hydroxyalkyl ester of an olefinically unsaturated carboxylic acid with 2-12 C atoms in the hydroxyalkyl residue with A2) at least one lactone and with A3) at least one hydroxy-functional alkyl-, cycloalkyl- and/or alkoxyamine with at least one primary and/or secondary amino group per molecule and with 2-10 C atoms per molecule, B) at least one cross-linking agent with functional groups reactive towards active hydrogen and optionally, C) at least one binder with functional groups containing active hydrogen.