Invention Grant
- Patent Title: Method for producing spherical thermoplastic polymer particles
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Application No.: US17596628Application Date: 2020-06-18
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Publication No.: US11897169B2Publication Date: 2024-02-13
- Inventor: Andreas Bauder , Kerstin Muelheims , Michael Freese , Achim Stammer
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen am Rhein
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen am Rhein
- Agency: Grüneberg and Myers PLLC
- Priority: EP 180876 2019.06.18
- International Application: PCT/EP2020/066966 2020.06.18
- International Announcement: WO2020/254498A 2020.12.24
- Date entered country: 2021-12-15
- Main IPC: B29B9/10
- IPC: B29B9/10 ; B29B9/12 ; B29B9/16 ; B33Y10/00 ; B33Y70/00 ; B33Y80/00 ; B29C64/153 ; B29C48/36 ; C08J3/16 ; B29K75/00

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.
Public/Granted literature
- US11850770B2 Method for producing spherical thermoplastic polymer particles Public/Granted day:2023-12-26
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