公开(公告)号：US11850770B2

公开(公告)日：2023-12-26

申请号：US17596628

申请日：2020-06-18

Applicant: BASF SE

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

IPC: B29B9/10 ,  B29B9/12 ,  B29B9/16 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  B29C64/153 ,  B29C48/36 ,  C08J3/16 ,  B29K75/00

CPC classification number: B29B9/10 ,  B29B9/12 ,  B29C48/36 ,  B29C64/153 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  C08J3/16 ,  B29B2009/166 ,  B29K2075/00 ,  C08J2375/04

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.

公开(公告)号：US11897169B2

公开(公告)日：2024-02-13

申请号：US17596628

申请日：2020-06-18

Applicant: BASF SE

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

IPC: B29B9/10 ,  B29B9/12 ,  B29B9/16 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  B29C64/153 ,  B29C48/36 ,  C08J3/16 ,  B29K75/00

CPC classification number: B29B9/10 ,  B29B9/12 ,  B29C48/36 ,  B29C64/153 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  C08J3/16 ,  B29B2009/166 ,  B29K2075/00 ,  C08J2375/04

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.

公开(公告)号：US20180297001A1

公开(公告)日：2018-10-18

申请号：US15769158

申请日：2016-10-20

Applicant: BASF SE

Inventor： Marion Winkelmann ,  Kerstin Muelheims ,  Ralph Tauber ,  Yannick Fuchs ,  Murat Cetinkaya ,  Bernd Sachweh

IPC: B01J13/18 ,  A01N25/28 ,  A01N25/04

Abstract: Provided herein is a process for preparing an aqueous dispersion of microparticles containing a water-insoluble, solid, non-polymeric, organic active or functional material (M) and an aminoplast resin (A) which surrounds or embeds material (M). The process includes the following steps: i) providing an aqueous slurry of the material (M) in the form of coarse particles; ii) subjecting the aqueous slurry to shear forces such that the coarse particles of the material (M) are comminuted and an aqueous suspension of fine particles of the material (M) is obtained; and iii) performing a polycondensation of an aminoplast pre-condensate during step (ii) or in the aqueous suspension of the fine particles of the material (M) obtained in step (ii); wherein step (ii) is performed in the presence of at least one protective colloid and in the presence of at least a portion of the aminoplast pre-condensate subjected to the polycondensation of step (iii).