Thermoplastic polymer powders and use thereof for selective laser sintering

A thermoplastic polymer powder P comprising:

• (A) 10% to 89.9% by weight, based on the overall polymer powder P, of at least one semicrystalline polyolefin A;
• (B) 10% to 89.9% by weight, based on the overall polymer powder P, of at least one amorphous styrene polymer B;
• (C) 0.1% to 20% by weight, based on the overall polymer powder P, of at least one compatibilizer C selected from the group consisting of styrene-butadiene block copolymers, styrene-polyolefin copolymers, acrylonitrile-styrene-polyolefin copolymers, and acrylonitrile-styrene-butadiene-polyolefin copolymers;
• (D) optionally 0% to 5% by weight, based on the overall polymer powder P, of at least one additive and/or auxiliary;
• wherein the sum total of the percentages by weight of components A, B, C, and, optionally, D together is 100% by weight;
• wherein the semicrystalline polymer A, the amorphous styrene polymer B, and the compatibilizer C are in the form of a polymer blend;
• and wherein the thermoplastic polymer powder P has a median particle diameter D50 in the range from 5 to 200 μm.