The invention relates to a thermoplastic polymer powder and to the use thereof as material for selective laser sintering (SLS). The polymer powder contains a semi-crystalline polyolefin, an amorphous styrene-polymer and a selected polymeric compatibilizer, in addition to optionally further additives and/or auxiliary agents. The semi-crystalline polymer, amorphous polymer and selected polymeric compatibilizer are present in the polymer powder in the form of a polymer blend. The invention also relates to a method for producing the thermoplastic polymer powder and to a method for selective laser sintering (SLS) using the polymer powder according to the invention.