公开(公告)号：US20220332017A1

公开(公告)日：2022-10-20

申请号：US17753082

申请日：2020-08-20

申请人： BASF SE

发明人： Michael Freese ,  Torben Kaminsky

IPC分类号： B29B9/06

摘要： An underwater granulation system has a water box, a perforated plate with multiple through-openings for feeding a polymer melt into the water box, and a cutting plate support which is arranged in the water box so as to be driven in rotation about an axis of rotation (X) in a cutting direction. The cutting plate support has multiple cutting plates which face the perforated plate and are adapted to form granules by shearing particles from the polymer melt entering through the perforated plate. The water box is connected to a water supply for heat evacuation and for evacuating the separated particles from the water box. The water box also has a hollow cylindrical portion relative to the axis of rotation (X), in which multiple water inlets distributed over the circumference and multiple water outlets distributed over the circumference are arranged.

公开(公告)号：US11850770B2

公开(公告)日：2023-12-26

申请号：US17596628

申请日：2020-06-18

申请人： BASF SE

发明人： Andreas Bauder ,  Kerstin Muelheims ,  Michael Freese ,  Achim Stammer

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

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

摘要： 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

申请人： BASF SE

发明人： Andreas Bauder ,  Kerstin Muelheims ,  Michael Freese ,  Achim Stammer

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

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

摘要： 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：US20220025097A1

公开(公告)日：2022-01-27

申请号：US17309421

申请日：2019-11-29

申请人： BASF SE

发明人： Frank Schaefer ,  Michael Freese ,  Elmar Poeselt ,  Etsuhiro Yamamoto ,  Yasuyuki Suzuki ,  Dai Watanabe ,  Patrick Drawe

IPC分类号： C08G18/10 ,  C08G18/32 ,  C08G18/48

摘要： A thermoplastic polyurethane having a glass transition temperature of the soft phase of not more than −25° C. measured using DMA and a heating rate of 2K/min at 1 Hz under torsion based on DIN EN ISO 6721: 2016; maximum G″ can be obtained by a process at least including the reaction of a polyol composition including a polypropylene glycol, wherein the proportion of the secondary terminal OH groups based on the total number of terminal OH groups of the polypropylene glycol is in the range of more than 90%, with a polyisocyanate to obtain a polyol composition including a prepolymer and the reaction of the polyol composition including the prepolymer with a polyisocyanate composition including at least one polyisocyanate and at least one chain extender having a molecular weight