The present invention relates to a powder coating composition for the production of matte coatings, containing A) a hydroxyl group-containing component, B) an addition polymerization compound which is based on aliphatic and/or cycloaliphatic diisocyanates and contains uretdione groups, C) a component which contains carboxyl and/or carboxylic acid anhydride groups and is selected from C1) aliphatic and/or cycloaliphatic dicarboxylic acids containing 4 to 20 carbon atoms, C2) monomeric and/or polymeric anhydrides of the acids C1) which may optionally be modified and C3) aliphatic hydroxycarboxylic acids containing 4 to 18 carbon atoms, and D) a component which contains groups which are reactive with carboxyl and/or carboxylic acid anhydride groups, provided that components A), B), C) and D) are present in amounts such that 0.6 to 1.4 isocyanate groups of component B) are present for each hydroxyl group of component A), 0.3 to 1.5 groups of component D) which are reactive with carboxyl and/or carboxylic acid anhydride groups are present for each carboxyl equivalent of component C) and the amount of components C) and D) is 10 to 40% by weight of the total amount of components A), B), C) and D). The present invention also relates to the use of this powder coating composition for coating heat-resistant substrates.