公开(公告)号：EP3781107A1

公开(公告)日：2021-02-24

申请号：EP19717287.7

申请日：2019-04-09

Applicant: BASF SE

Inventor： BAUER, Stephan ,  BAUMANN, Katrin ,  HERFERT, Norbert ,  DUAN, Li Guo ,  LI, Le ,  LIU, Xiao Yan ,  SUN, Gao Min

IPC: A61F13/53 ,  A61F13/537 ,  A61L15/60

公开(公告)号：EP3381956A1

公开(公告)日：2018-10-03

申请号：EP18155569.9

申请日：2013-11-07

Applicant: BASF SE

Inventor： DANIEL, Thomas ,  HERFERT, Norbert ,  BAUMANN, Katrin ,  REINHARD, Birgit ,  FREIBERG, Juergen ,  BAUDUIN, Christophe ,  DOBROSIELSKA-OURA, Katarzyna ,  MITCHELL, Michael

IPC: C08F220/06 ,  A61L15/22

CPC classification number: C08J3/245 ,  A61L15/225 ,  A61L15/425 ,  A61L15/60 ,  B01J20/267 ,  B01J20/28004 ,  B01J20/28011 ,  B01J20/28019 ,  C08F6/008 ,  C08F220/06 ,  C08F222/1006 ,  C08J3/247 ,  C08J9/00 ,  C08J2207/12 ,  C08J2333/02

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-post-crosslinker and thermal surface-postcrosslinking at temperatures in the range from 100 to 180°C.

公开(公告)号：EP2922879B1

公开(公告)日：2017-01-11

申请号：EP13789302.0

申请日：2013-11-11

Applicant: BASF SE

Inventor： DANIEL, Thomas ,  HERFERT, Norbert ,  BAUER, Stephan ,  BAUMANN, Katrin ,  REINHARD, Birgit ,  FREIBERG, Jürgen ,  SCHLIWA, Rudolf

IPC: A61L15/42 ,  C08F6/00 ,  A61L15/22 ,  C08L33/02 ,  A61L15/60 ,  C08F220/06

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：EP2950829A1

公开(公告)日：2015-12-09

申请号：EP14700906.2

申请日：2014-01-20

Applicant: BASF SE

Inventor： BAUER, Stephan ,  HERFERT, Norbert ,  KÖNIG, Lydia ,  HAGEN, Yvonne ,  ROMANI FERNANDEZ, Xiana ,  SCHÖPPLER, Marcus

IPC: A61L15/22 ,  A61L15/60 ,  C08F6/00 ,  C08L33/02

CPC classification number: C08F220/06 ,  A61L15/24 ,  A61L15/60 ,  C08F6/005 ,  C08F6/008 ,  C08L33/02 ,  C08L2201/54 ,  C08L2312/00

Abstract: The invention relates to a method for removing residual monomers from water-absorbing polymer particles, wherein the water-absorbing polymer particles are thermally post-treated in a mixer having rotating mixing tools at a temperature of at least 60°C in the presence of water and a tenside.

公开(公告)号：EP2550306B1

公开(公告)日：2014-07-02

申请号：EP11709720.4

申请日：2011-03-23

Applicant: BASF SE

Inventor： DANIEL, Thomas ,  KRÜGER, Marco ,  FLORE, Karin ,  BLEI, Stefan ,  STUEVEN, Uwe ,  HERFERT, Norbert ,  MITCHELL, Michael A.

IPC: C08F2/10

CPC classification number: C08F2/10 ,  A61L15/60 ,  B01J8/0045 ,  B01J8/006 ,  B01J8/1827 ,  B01J2208/00274 ,  B01J2219/00006 ,  C08F2/34 ,  C08F220/06 ,  C08F222/1006

公开(公告)号：EP2547705B1

公开(公告)日：2014-07-02

申请号：EP11707684.4

申请日：2011-03-14

Applicant: BASF SE

Inventor： HERFERT, Norbert ,  DANIEL, Thomas ,  PARCHANA, Bootsara

IPC: C08F220/06 ,  A61L15/60 ,  C08F6/00 ,  C08J3/24 ,  C08K5/42 ,  C08K5/53

CPC classification number: C08F220/06 ,  A61L15/60 ,  C08F6/008 ,  C08F222/1006 ,  C08J3/245 ,  C08J2333/02 ,  C08K5/0025 ,  C08K5/42 ,  C08L33/02

公开(公告)号：EP2134772B1

公开(公告)日：2013-06-05

申请号：EP08717547.7

申请日：2008-03-10

Applicant: BASF SE

Inventor： HERFERT, Norbert ,  WENDKER, Martin ,  BARTHEL, Holger ,  CHIANG, William G-J

IPC: C08J3/24 ,  C08L101/14

CPC classification number: C08J3/245 ,  C08J2300/14

公开(公告)号：EP2190393B1

公开(公告)日：2012-08-15

申请号：EP08804075.3

申请日：2008-09-12

Applicant: BASF SE

Inventor： HERFERT, Norbert ,  FEISE, Hermann Josef ,  WOLF, Hanno Rüdiger

IPC: A61F13/15 ,  A61L15/60

CPC classification number: A61F13/15617 ,  A61F13/15764

Abstract: Superabsorbents are metered by a process using a screw conveyor, wherein the superabsorbent is selected, or treated with a cohesion control agent, to have an uncon- fined yield strength of from 0.75 to 1.5 kPa at consolidation stress of 6 kPa.

公开(公告)号：EP2307486A2

公开(公告)日：2011-04-13

申请号：EP09781227.5

申请日：2009-07-29

Applicant: BASF SE

Inventor： RIEGEL, Ulrich ,  DANIEL, Thomas ,  HERFERT, Norbert ,  ELLIOTT, Mark

IPC: C08J3/075 ,  A61L15/42

CPC classification number: A61L15/60 ,  A61L15/42 ,  C08J3/075 ,  C08J2300/14 ,  C08L101/14

Abstract: Superabsorbents containing a compound of formula (I) where M represents a hydrogen atom, an ammonium ion, a monovalent metal ion or one equivalent of a divalent metal ion of groups 1, 2, 8, 9, 10, 12 or 14 of the periodic table; R
1 represents OH or NR
4 R
5 , where R
4 and R
5 independently represent H or C
1 -C
6 -alkyl; R
2 represents H or an alkyl, alkenyl, cycloalkyl or aryl group which optionally has 1, 2 or 3 substituents selected independently from C
1 -C
6 -alkyl, OH, O-C
1 -C
6 -alkyl, halogen and CF
3 ; and R
3 represents COOM, SO
3 M, COR
4 , CONR
4 R
5 or COOR
4 , where M, R
4 and R
5 are each as defined above, or, when R
2 represents aryl which is optionally substituted as indicated above, also represents H, salts thereof or mixtures of such compounds and/or salts thereof display improved stability to discoloration in storage under elevated temperatures or elevated relative humidity.

公开(公告)号：EP1611165B1

公开(公告)日：2009-11-11

申请号：EP04721845.8

申请日：2004-03-19

Applicant: BASF SE

Inventor： HERFERT, Norbert ,  AZAD, Michael, M. ,  CARRICO, Peter, W.

IPC: C08F4/04 ,  C08F4/32 ,  C08F4/40 ,  C08J3/28 ,  C08J3/12 ,  C08F6/00 ,  C08F2/10 ,  C08F2/48

CPC classification number: C08J3/28 ,  A61L15/60 ,  C08F6/006 ,  C08J2300/14 ,  Y10T428/2982

Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The color-stable superabsorbent polymer is prepared in the essential absence of a persulfate, and is subjected to a low dose of ultraviolet radiation. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.