High solid coating compositions

A coating composition comprising:

• A) at least one low molecular weight reactive compound with a molecular weight (Mn) of 300–1,500 g/mol with at least one group selected from the group consisting of secondary amino group, tertiary amino group and a mixture thereof 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 amine having 2–10 carbon atoms per molecule and where the amino group is selected from the group consisting of primary amines, secondary amines and mixtures thereof and the hydroxy-functional amine is selected from the group consisting of hydroxy functional alkyl amines, hydroxy-functional cyclo alkylamines, hydroxy-functional alkoxyamines and any mixtures thereof;
• 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.