Heat-curing powder-lacquer compositions yielding a matte surface after curing of the coating, as well as a simple method for production of same

A powder-lacquer composition, comprising:

• A) at least one carboxylate-group-comprising polymer having an acid number of 5 to 250 mg KOH/g and a glass transition temperature Tg higher than 40° C.;
• and
• B) at least one β-hydroxyalkylamide having two or three or four β-hydroxyalkylamide groups per molecule of formula (I)
• wherein
• R1 and R2, independently of one another denote the same or different radicals, selected from the group consisting of an alkyl radical, a cycloalkyl radical, an aryl radical, an aralkyl radical, and an alkenyl radical, having 1-24 carbon atoms, optionally comprising at least one member selected from the group consisting of a heteroatom and a functional group,
• or R1 is hydrogen,
• or R2 is
• and A is at least one member selected from the group consisting of
• wherein R3 independently of one another denote the same or different radicals, selected from the group consisting of hydrogen, an alkyl radical, a cycloalkyl radical, an aryl radical, an aralkyl radical, and an alkenyl radical, having 1-24 carbon atoms, optionally comprising at least one member selected from the group consisting of a heteroatom and a functional group, and wherein two or more R3 substituents are optionally linked to one another to form rings;
• wherein the β-hydroxyalkylamide exists in solid form below 150° C.;
• C) optionally, at least one member selected from the group consisting of a processing aid and an additive;
• wherein a ratio of β-hydroxyalkylamide groups to carboxylate groups ranges between 0.5:1 and 1.5:1,
• and wherein component (B) has two endothermic peaks according to DSC analysis (differential scanning calorimetry).