Use of polyhydroxyalkanoates as additives in coating compositions

A coating composition comprising polyhydroxyalkanoate particles, wherein the coating composition comprises 0.01-10 wt % of polyhydroxyalkanoate particles, based in each case on the total amount of the coating composition, wherein the polyhydroxyalkanoate particles have a particle size d50 of 0.5 μm to 7 μm, and the coating composition comprises at least one self-crosslinking or externally crosslinking polymeric resin as binder selected from the group of polyurethane, polyester, polyester polyol, acrylic, polyacrylate, polymethacrylate, polyester acrylate, epoxy and/or alkyd resins and optionally at least one crosslinking agent in a total fraction of 15 to 99.5 wt % and at least one solvent in a fraction of 0 to 84.99 wt %, based in each case on the total amount of the coating composition, and the coating composition is a chemically curable and/or radiation-curing coating composition.