Thermoplastic polymer powder for selective laser sintering (sls)

A thermoplastic polymer powder P comprising

• (A) from 10 to 89.9% by weight, based on the entire polymer powder P, of at least one semicrystalline polymer A;
• (B) from 10 to 89.9% by weight, based on the entire polymer powder P, of at least one amorphous polymer B, where the amorphous polymer B is at least one polymer selected from the group consisting of styrene-butadiene block copolymers, acrylonitrile-butadiene-styrene copolymers, styrene-acrylonitrile copolymers, a(alpha)-methylstyrene-acrylonitrile copolymers, acrylate-styrene-acrylonitrile copolymers, methyl methacrylate-acrylonitrile-butadiene-styrene copolymers, methyl methacrylate-butadiene-styrene copolymers, styrene-methyl methacrylate copolymers, amorphous polystyrene, and impact-modified polystyrene;
• (C) from 0.1 to 15% by weight, based on the entire polymer powder P, of at least one compatibilizer C, selected from the group consisting of styrene-acrylonitrile-maleic anhydride terpolymers, styrene-N-phenylmaleimide-maleic anhydride terpolymers, and methylmethacrylate-maleic anhydride copolymers;
• (D) optionally from 0 to 5% by weight, based on the entire polymer powder P, of at least one additive and/or auxiliary;
• where the sum of the % s by weight of components A, B, C, and optionally D is 100% by weight;
• where the semicrystalline polymer A, the amorphous polymer B, and the compatibilizer C are present in the form of a polymer blend;
• and where the D50 median particle diameter of the thermoplastic powder P is in the range from 5 to 200 μm.