公开(公告)号：US20190135993A1

公开(公告)日：2019-05-09

申请号：US16217740

申请日：2018-12-12

Applicant: BASF SE

Inventor： Thomas Daniel ,  Norbert Herfert ,  Stephan Bauer ,  Katrin Baumann ,  Birgit Reinhard ,  Jürgen Freiberg ,  Christophe Bauduin ,  Katarzyna Dobrosielska-Oura ,  Michael A. Mitchell

IPC: C08J3/24 ,  C08F6/00 ,  B01J20/28 ,  B01J20/26 ,  A61L15/22 ,  C08F220/06 ,  A61L15/42 ,  C08J9/00 ,  A61L15/60

Abstract: The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles by coating of water-absorbent polymer particles having a content of residual monomers in the range from 0.03 to 15% by weight with at least one surface-postcrosslinker and thermal surface-postcrosslinking at temperatures in the range from 100 to 180° C.

公开(公告)号：US09944739B2

公开(公告)日：2018-04-17

申请号：US15661543

申请日：2017-07-27

Applicant: BASF SE

Inventor： Thomas Daniel ,  Norbert Herfert ,  Stephan Bauer ,  Katrin Baumann ,  Birgit Reinhard ,  Jürgen Freiberg ,  Rudolf Schliwa

IPC: A61L15/22 ,  C08F220/06 ,  C08L33/02 ,  B01J20/28 ,  B01J20/26 ,  A61L15/24 ,  C08F6/00 ,  A61L15/42 ,  A61L15/60

CPC classification number: C08F220/06 ,  A61L15/22 ,  A61L15/24 ,  A61L15/42 ,  A61L15/60 ,  B01J20/267 ,  B01J20/28023 ,  B01J20/2805 ,  C08F6/005 ,  C08L33/02 ,  C08L33/08 ,  C08F2222/1013

Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution comprising less than 0.3% by weight of persulfate and at least 0.05% by weight of azo initiator and thermal aftertreatment of the formed polymer particles at less than 100° C. in a fluidized bed for 60 to 300 minutes.

公开(公告)号：US20180043052A1

公开(公告)日：2018-02-15

申请号：US15552849

申请日：2016-01-26

Applicant: BASF SE

Inventor： Stephan Bauer ,  Yvonne Hagen ,  Katrin Baumann ,  Christophe Bauduin ,  Thomas Daniel ,  Thomas Pfeiffer

IPC: A61L15/60 ,  B01J19/24 ,  B01J4/00 ,  C08J3/24 ,  C08F2/06 ,  C08F2/34 ,  C08F220/06 ,  B01J19/20 ,  B01J8/44

CPC classification number: A61L15/60 ,  B01J4/002 ,  B01J8/44 ,  B01J19/20 ,  B01J19/2415 ,  B01J2219/185 ,  B01J2219/1943 ,  C08F2/06 ,  C08F2/34 ,  C08F220/06 ,  C08J3/245 ,  C08J2333/02 ,  C08F2222/1013

Abstract: The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution, wherein water-absorbent polymer particles having an average particle diameter from 420 to 700 μm, an amount of water-absorbent polymer particles having a particle size of less than 300 μm of less than 5% by weight and an amount of water-absorbent polymer particles having a particle size of more than 800 μm of less than 5% by weight are coated with at least one surface-postcrosslinker and thermal surface-postcrosslinked.

公开(公告)号：US20160272745A1

公开(公告)日：2016-09-22

申请号：US14442501

申请日：2013-11-11

Applicant: BASF SE

Inventor： Thomas Daniel ,  Norbert Herfert ,  Stephan Bauer ,  Katrin Baumann ,  Birgit Reinhard ,  Jürgen Freiberg ,  Rudolf Schliwa

IPC: C08F220/06 ,  B01J20/28 ,  B01J20/26 ,  A61L15/24 ,  A61L15/60

CPC classification number: C08F220/06 ,  A61L15/22 ,  A61L15/24 ,  A61L15/42 ,  A61L15/60 ,  B01J20/267 ,  B01J20/28023 ,  B01J20/2805 ,  C08F6/005 ,  C08L33/02 ,  C08L33/08 ,  C08F2222/1013

Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution comprising less than 0.3% by weight of persulfate and at least 0.05% by weight of azo initiator and thermal aftertreatment of the formed polymer particles at less than 100° C. in a fluidized bed for 60 to 300 minutes.

Abstract translation: 本发明涉及通过聚合包含小于0.3重量％的过硫酸盐和至少0.05重量％的偶氮引发剂的单体溶液的液滴制备吸水性聚合物颗粒的方法，并且所形成的聚合物颗粒的热后处理少 在流化床中超过100℃，持续60至300分钟。