FIELD: production of composite materials.
SUBSTANCE: present invention relates to a composite salt containing calcium salt, a method for production thereof, use thereof, as well as to structural parts, obtained by selective laser sintering method, in addition to implants for applications in neurosurgery, oral surgery, maxillofacial surgery, surgery in neck, nose and ears, as well as surgery in the hands, feet, chest, ribs and shoulders. Described is a composite powder for laser sintering, comprising microstructured particles obtained by a method, in which coarse particles are combined with fine particles, wherein coarse particles have an average particle diameter in range of 10 mcm to 10 mm, coarse particles include at least one polymer, fine particles are placed on surface of coarse particles and/or heterogeneously dispersed inside coarse particles, fine particles include calcium salt, fine particles have average particle size in range of 0.01 mcm to 1.0 mcm, where composite powder particles have average particle size d50 in range of 10 mcm to less than 200 mcm, and the fraction of the fine fraction in the composite powder is less than 50 vol %, and the polymer includes repeating structural units of lactic acid, hydroxybutyric acid and/or glycolic acid or is a polyolefin. Composite powder (versions) and an implant are also described.
EFFECT: there is created material with improved characteristics of laser sintering, which has especially improved flowability, during laser sintering it is possible to produce structural parts with improved surface purity and surface quality, as well as with improved density of structural parts, and in particular with improved shrinkage characteristics and improved dimensional stability of the obtained structural parts, and also exhibits improved heat conductivity characteristics outside the laser processing areas.
19 cl, 9 dwg, 4 tbl, 15 ex
