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-containing 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, R2:
• independently of one another denote the same or different radicals, selected from the group consisting of alkyl radicals, cycloalkyl radicals, aryl radicals, aralkyl radicals and alkenyl radicals having 1-24 carbon atoms, wherein the radicals optionally contain a heteroatom and/or a functional group and wherein R1 may also be hydrogen,
• and wherein R2 may also be
• and
• A is selected from the group consisting of A1 and A3:
• wherein R3:
• independently of one another denote the same or different radicals, selected from the group consisting of hydrogen, alkyl radicals, cycloalkyl radicals, aryl radicals, aralkyl radicals and alkenyl radicals having 1-24 carbon atoms, wherein the radicals optionally contain a heteroatom and/or a functional group and wherein two or more R3 substituents optionally are linked to one another to form a ring;
• wherein the β-hydroxyalkylamide exists in solid form below 150° C.;
• C) optionally, a processing aid and/or an additive;
• wherein the ratio of β-hydroxyalkylamide groups to the carboxylate groups ranges between 0.5:1 and 1.5:1.