公开(公告)号：US20190318855A1

公开(公告)日：2019-10-17

申请号：US16461969

申请日：2017-11-20

Applicant: Arkema France

Inventor： Arnaud LEMAITRE ,  François TANGUY

IPC: H01F1/08 ,  H01F1/113 ,  B22F1/00 ,  B22F3/105 ,  B22F9/04

Abstract: A sinterable magnetic powder composition including: from 50 to 95% of a powder magnet; and from 5 to 50% by weight of at least one thermoplastic polymer; for the total weight of the composition, said powder composition having a D50 comprised within the range of 0.1 to 100 μm. And, to the use of the composition in processes used to agglomerate powders, layer by layer, by melting or sintering, for manufacturing three-dimensional magnetic objects.

公开(公告)号：US20240092014A1

公开(公告)日：2024-03-21

申请号：US17767954

申请日：2020-10-12

Applicant: Arkema France

Inventor： Emilie-Marie SOARES LATOUR ,  Ornella ZOVI ,  Arnaud LEMAITRE ,  Hervé STER

IPC: B29C64/153 ,  C08G69/08 ,  C08G69/26

CPC classification number: B29C64/153 ,  C08G69/08 ,  C08G69/26 ,  B29K2105/251

Abstract: A polyamide powder for use in a process of powder agglomeration by sintering, including at least one chain limiting agent. A process for preparing a powder including at least one chain limiting agent, wherein the chain limiter is mixed with the polyamide powder, and if need be at least one thioether antioxidant, by dry blending.

公开(公告)号：US20220213319A1

公开(公告)日：2022-07-07

申请号：US17604789

申请日：2020-04-16

Applicant: Arkema France

Inventor： Geoffroy CAMMAGE ,  Arnaud LEMAITRE ,  Emilie-Marie SOARES LATOUR

IPC: C08L77/02 ,  B29C64/153

Abstract: The invention relates to a seeded particle of polyamide (PA) powder consisting of: a polyamide core with a D50 within the range from 15 to 60 μm, and a polyamide shell, characterized in that the shell has an inherent viscosity in solution and a melting temperature which are respectively higher than those of the core.

公开(公告)号：US20210348008A1

公开(公告)日：2021-11-11

申请号：US17282891

申请日：2019-10-11

Applicant: Arkema France

Inventor： Ornella ZOVI ,  Arnaud LEMAITRE ,  Jean-Charles DURAND

IPC: C09D11/102 ,  C08K5/37 ,  B33Y70/00

Abstract: A powder intended for 3D printing, based on thermoplastic polymer, wherein it contains at least 0.1% by weight of at least one thioether antioxidant relative to the total weight of powder. Also, a process for stabilizing the color of a powder based on polymer in a 3D printing process, in which at least 0.1% by weight of at least one thioether antioxidant is incorporated relative to the total weight of powder.