公开(公告)号：US20220250283A1

公开(公告)日：2022-08-11

申请号：US17596628

申请日：2020-06-18

Applicant: BASE SE

Inventor： Andreas Bauder ,  Kerstin Muelheims ,  Michael Freese ,  Achim Stammer

IPC: B29B9/10 ,  B29C64/153 ,  B29B9/12 ,  B29C48/36 ,  C08J3/16 ,  B33Y70/00 ,  B33Y10/00 ,  B33Y80/00

Abstract: A process for producing particles of a thermoplastic polymer in spherical form involves providing at least one thermoplastic polymer in a molten state and providing an aqueous solution of at least one surface-active substance. The aqueous solution is in a temperature range from 100 to 300° C. The process also involves dispersing the thermoplastic polymer in the aqueous solution to obtain an aqueous solution containing dispersed thermoplastic polymer, which is cooled down to a temperature below the solidification point of the thermoplastic polymer to obtain a suspension containing an aqueous solution and particles of the thermoplastic polymer suspended in a solid state and in spherical form. The particles can be separated from the suspension and, optionally, dried. The particles obtained from the process have a particle size distribution having a d[4,3] value of more than 10 μm and a d90.3 value of more than 20 μm.