Method For Producing Polyamide Powder For 3 D Printing

Abstract: The invention relates to a method for producing a polyamide powder by anionic polymerization in a solvent, comprising the following steps: a) forming a reaction medium comprising the introduction of at least one lactam monomer into said solvent, the introduction of at least one catalyst into said solvent and the introduction of at least one activator into said solvent at a given temperature; b) polymerizing the lactam monomer to give polyamide in the reaction medium; c) precipitating the polyamide in powder form in the reaction medium; and d) heating, after step a), preferably after step c), the reaction medium to a temperature higher than the temperature at which the at least one activator was introduced and which ranges from 140 to 200°C The invention also relates to a powder obtained by such a method and to uses of such a powder.

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