Thermoplastic polymer powder for 3D printing
AssigneeArkema France
InventorJean-Charles DURAND
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Abstract
The present invention relates to a polymer powder for the manufacture of articles by 3D printing, in particular by sintering, comprising a thermoplastic polymer, antioxidants, and a particular metal oxide, metal hydroxide and/or hydrotalcite, having improved thermal stability, improved recyclability and improved consistency of mechanical properties of the sintered parts. The invention also relates to a process for preparing this powder and to the use thereof in a process for manufacturing by sintering, and to the articles manufactured from said powder.
Claims18
A polymer powder suitable for 3D printing by sintering, comprising:
- (a) a semicrystalline thermoplastic polymer,
- (b) one or more antioxidants and
- (c) a metal oxide, a metal hydroxide, and/or a hydrotalcite, the metal oxide, the metal hydroxide and the hydrotalcite being derived from one or more alkaline-earth metals, or from one or more post-transition metals.
A method of using a metal oxide, a metal hydroxide, and/or a hydrotalcite derived from one or more alkaline-earth metals, or from one or more post-transition metals, in a polymer powder suitable for 3D printing by sintering, for improving the thermal stability of said powder.
A method of using a metal oxide, a metal hydroxide, and/or a hydrotalcite derived from one or more alkaline-earth metals, or from one or more post-transition metals, in a polymer powder suitable for 3D printing by sintering, for improving the mechanical property of the printed parts manufactured from said powder.
Dependencies are inferred from the claim text.