公开(公告)号：US11203005B2

公开(公告)日：2021-12-21

申请号：US15532153

申请日：2015-11-24

Applicant: BASF SE

Inventor： Tina Mark ,  Thomas Daniel ,  Erich Lutz ,  Stefan Molter ,  Anna Kowalski

IPC: C08F2/18 ,  B01J20/26 ,  A61L15/60 ,  C08J3/24 ,  A61F13/53 ,  A61L15/24 ,  B01J20/30 ,  C08F20/06

Abstract: A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the agglomerated base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 100 to 190° C.

公开(公告)号：US20210362126A1

公开(公告)日：2021-11-25

申请号：US16958793

申请日：2019-01-02

Applicant: BASF SE

Inventor： Stephan Bauer ,  Katrin Baumann ,  Markus Toennessen ,  Christophe Bauduin ,  Markus Christian Biel ,  Thomas Daniel

IPC: B01J20/28 ,  A61L15/60

Abstract: Superabsorbent mixtures M comprising at least 70% by weight of superabsorbent A having a liquid absorption of 20 g/g (T20) of less than 300 s and/or a volumetric liquid absorption under pressure 0.3 psi (2.07 kPa) (VAUL) with a τ value of less than 400 s, and at least 5% by weight of superabsorbent B having a centrifuge retention capacity (CRC) of at least 30 g/g.

公开(公告)号：US20210301040A1

公开(公告)日：2021-09-30

申请号：US16321638

申请日：2017-08-01

Applicant: BASF SE

Inventor： Kristine Hartnagel ,  Thomas Gieger ,  Thomas Daniel ,  Marcus Schroeder ,  Michelle Morano ,  Nathaniel Troy Greene

IPC: C08F2/22 ,  A61L15/60 ,  C08F2/01 ,  C08F2/44 ,  C08K3/011 ,  C08J3/24 ,  C08J3/12 ,  C08F220/06 ,  C08K5/5317 ,  C08K3/30 ,  B01J20/28 ,  B01J20/26 ,  C08F6/14

Abstract: A process for producing superabsorbents, comprising polymerization of a monomer solution and thermal surface postcrosslinking, wherein the monomer solution comprises at least 0.75% by weight of a hydroxyphosphonic acid or salts thereof, calculated on the basis of the total amount of monomer used, and at least 0.09% by weight of aluminum cations, calculated on the basis of the total amount of polymer particles used, is added to the polymer particles before, during or after the thermal surface postcrosslinking.

公开(公告)号：US20210033516A1

公开(公告)日：2021-02-04

申请号：US16968225

申请日：2019-02-18

Applicant: BASF SE

Inventor： Markus Toennessen ,  Marc Haefner ,  Karsten Kraemer ,  Christophe Bauduin ,  Thomas Daniel

IPC: G01N15/08

Abstract: A method of measuring indices in superabsorbents, by initially charging excess aqueous solution or dispersion, swelling the superabsorbent in the initially charged aqueous solution or dispersion while stirring, dissolving or dispersing a component A in the aqueous solution or dispersion, measuring the enrichment of component A in the aqueous solution or dispersion during the swelling of the superabsorbent, using the enrichment of component A in the aqueous solution or dispersion to measure the time-dependent swelling characteristics and using these to determine the swelling constant k or the characteristic swell time T, the index being dependent on the permeability of the superabsorbent, and ascertaining the index by means of a correlation measured beforehand between swelling constant k and index or characteristic swell time T and index.

公开(公告)号：US20200332038A1

公开(公告)日：2020-10-22

申请号：US16913170

申请日：2020-06-26

Applicant: BASF SE

Inventor： Stephan Bauer ,  Tina Mark ,  Lydia König ,  Yvonne Hagen ,  Thomas Daniel

IPC: C08F220/06 ,  A61L15/60 ,  A61L15/42 ,  A61F13/53 ,  A61F13/534 ,  A61L15/24

Abstract: A process for producing water-absorbing polymer particles by suspension polymerization and thermal surface postcrosslinking, wherein the base polymer obtained by suspension polymerization has a centrifuge retention capacity of at least 37 g/g and the thermal surface postcrosslinking is conducted at 100 to 190° C.

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：US20180126030A1

公开(公告)日：2018-05-10

申请号：US15564215

申请日：2016-03-29

Applicant: BASF SE

Inventor： Tina Mark ,  Thomas Daniel ,  Erich Lutz

IPC: A61L15/22 ,  A61L15/60 ,  C08F265/06 ,  C08F222/38 ,  C08L51/00 ,  C08J11/02

CPC classification number: A61L15/22 ,  A61L15/60 ,  C08F6/18 ,  C08F222/385 ,  C08F265/04 ,  C08F265/06 ,  C08J11/02 ,  C08L51/003 ,  C08F265/02 ,  C08F220/06

Abstract: A process for agglomerating superabsorbent particles, wherein polymer particles having a particle size of 250 μm or less are dispersed in a hydrophobic organic solvent, the dispersed polymer particles are mixed with an aqueous monomer solution, the amount of unneutralized monomer applied with the monomer solution being from 0.5% to 80% by weight, based on the dispersed polymer particles, and the monomer solution is polymerized.

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：US20180043051A1

公开(公告)日：2018-02-15

申请号：US15552844

申请日：2016-02-17

Applicant: BASF SE

Inventor： Tina Mark ,  Thomas Daniel ,  Stefan Molter ,  Erich Lutz

IPC: A61L15/60 ,  C08F2/14 ,  C08F2/18

CPC classification number: A61L15/60 ,  C08F2/14 ,  C08F2/18 ,  C08F220/06 ,  C08F222/385

Abstract: A process for producing water-absorbing polymer particles by suspension polymerization, wherein the polymerization is conducted in the presence of dissolved oxygen.