公开(公告)号：US20220372236A1

公开(公告)日：2022-11-24

申请号：US17765725

申请日：2020-10-08

Applicant: Arkema France

Inventor： Alexis MORFIN ,  Jean-Charles DURAND

IPC: C08J5/12 ,  B33Y10/00 ,  B33Y70/10

Abstract: The invention relates to a composition for the layer-by-layer building of a three-dimensional article by sintering of the composition brought about by electromagnetic radiation, the composition comprising a semicrystalline thermoplastic polymer powder and at least one wax, the wax having a dropping point which is greater than the crystallization temperature of the semicrystalline thermoplastic polymer, said composition in addition optionally comprising a flow agent.
The invention also relates to a process for the preparation of said composition and also to its use for the layer-by-layer building of a three-dimensional article.

公开(公告)号：US20240101834A1

公开(公告)日：2024-03-28

申请号：US18272165

申请日：2022-01-14

Applicant: ARKEMA FRANCE

Inventor： Alexis MORFIN

IPC: C09D5/03 ,  B33Y70/00 ,  C09D7/61 ,  C09D177/12

CPC classification number: C09D5/035 ,  B33Y70/00 ,  C09D5/031 ,  C09D7/61 ,  C09D177/12 ,  C08K3/04

Abstract: The invention is targeted mainly at a polymer powder suitable for 3D printing by sintering, comprising:



(a) a polymer composition comprising at least one thermoplastic elastomer;
(b) a pigment composition comprising at least one pigment exhibiting an absorbance of the light with a wavelength of 1000 nm, as measured according to the standard ASTM E1790, of less than 50%; and also, if appropriate,
(c) one or more fillers or reinforcements; and
(d) one or more additional additives.




The invention is also targeted at a process for the preparation of said powder and also at the use of said powder for 3D printing by sintering. Finally, it is targeted at the use of a pigment exhibiting an absorbance of the light with a wavelength of 1000 nm, as measured according to the standard ASTM E1790, of less than 50% to improve the definition and/or the mechanical properties of the articles printed by a process of 3D printing by sintering of a thermoplastic elastomer powder.

公开(公告)号：US20220213274A1

公开(公告)日：2022-07-07

申请号：US17610830

申请日：2020-05-15

Applicant: Arkema France

Inventor： Alexis MORFIN ,  Benoît BRULE ,  Apolline PALAIS ,  Nadine DECRAEMER

IPC: C08G81/00 ,  C08K3/36 ,  C08K3/22 ,  C08J3/12 ,  C08G69/40 ,  C09D177/00 ,  B33Y10/00 ,  B33Y40/10 ,  B33Y70/00 ,  B29C64/153 ,  B29C64/314

Abstract: A powder of a copolymer with polyamide blocks and polyether blocks. The invention concerns a composition comprising a powder of a copolymer with polyamide blocks and polyether blocks, the copolymer being in particle form with a pulverulent filler content of 0 to 10% by mass and the copolymer having a ratio by mass of the polyamide blocks to the polyether blocks of less than or equal to 0.7, the polyamide blocks having a number-average molar mass of less than or equal to 1000 g/mol; and the composition comprising a flow aid at a content of greater than or equal to 0.3% by mass. The invention also concerns the process for producing this composition, the use of the composition for constructing three-dimensional articles, and the three-dimensional articles manufactured from said composition.