公开(公告)号：ZA9101671B

公开(公告)日：1992-11-25

申请号：ZA9101671

申请日：1991-03-07

Applicant: BASF AG

Inventor： NIESSNER MANFRED ,  MANFRED NIESSNER ,  WICKEL STEFAN ,  STEFAN WICKEL ,  SCHNEIDER WALTER ,  WALTER SCHNEIDER ,  BECK JUERGEN ,  JUERGEN BECK ,  HARTMAN HEINRICH ,  HEINRICH HARTMAN ,  MEYER THOMAS ,  THOMAS MEYER

IPC: C08F2/08 ,  C08F2/10 ,  C08F2/44 ,  C08F ,  D21H

CPC classification number: C08F2/10

公开(公告)号：AU590693B2

公开(公告)日：1989-11-09

申请号：AU7042787

申请日：1987-03-20

Applicant: BASF AG

Inventor： NOWAKOWSKY BERNHARD HENRYK ,  BECK JUERGEN ,  HARTMANN HEINRICH ,  VAMVAKARIS CHRISTOS

IPC: A61L15/00 ,  A61L15/60 ,  C08F2/10 ,  C08F2/18 ,  C08F20/00 ,  C08F20/06 ,  C08F20/56 ,  C08F26/10 ,  C08F220/06

公开(公告)号：DE4007313A1

公开(公告)日：1991-09-12

申请号：DE4007313

申请日：1990-03-08

Applicant: BASF AG

Inventor： NIESSNER MANFRED DR ,  WICKEL STEFAN DR ,  SCHNEIDER WALTER ,  BECK JUERGEN ,  HARTMANN HEINRICH DR ,  MEYER THOMAS

IPC: C08F2/08 ,  C08F2/10 ,  C08F2/44

公开(公告)号：AU7271491A

公开(公告)日：1991-09-12

申请号：AU7271491

申请日：1991-03-07

Applicant: BASF AG

Inventor： NIESSNER MANFRED ,  WICKEL STEFAN ,  SCHNEIDER WALTER ,  BECK JUERGEN ,  HARTMANN HEINRICH ,  MEYER THOMAS

IPC: C08F2/08 ,  C08F2/10 ,  C08F2/44 ,  C08F2/16

公开(公告)号：AT63323T

公开(公告)日：1991-05-15

申请号：AT86114234

申请日：1986-10-15

Applicant: BASF AG

Inventor： NOWAKOWSKY BERNHARD HENRYK DR ,  BECK JUERGEN ,  HARTMANN HEINRICH DR ,  VAMVAKARIS CHRISTOS DR

IPC: B01J19/18 ,  C08F2/00 ,  C08F2/10 ,  C08F2/24 ,  C08F20/00 ,  C08F20/02 ,  C08F20/06 ,  C08F20/10 ,  C08F20/28 ,  C08F20/52 ,  C08F20/56 ,  C08F220/04

公开(公告)号：DE3926169A1

公开(公告)日：1991-02-14

申请号：DE3926169

申请日：1989-08-08

Applicant: BASF AG

Inventor： NIESSNER MANFRED DR ,  BECK JUERGEN ,  HARTMANN HEINRICH DR ,  KEMNA ANDREAS H ,  WICKEL STEFAN DR

IPC: A61F13/53 ,  A61F13/15 ,  A61F13/49 ,  B01J20/26 ,  C08F6/00 ,  C08J3/00

Abstract: Process for improving the water absorption capacity of crosslinked, water-swellable polymers by treating water-containing, finely divided polymer gels having a solids content of 20 to 65% by weight at temperatures of at least 50 DEG C with steam, the solids content of the water-containing polymer gels being increased by not more than 30% by weight and the polymer gels then being dried in a conventional manner.

公开(公告)号：AU6022990A

公开(公告)日：1991-02-14

申请号：AU6022990

申请日：1990-08-07

Applicant: BASF AG

Inventor： NIESSNER MANFRED ,  BECK JUERGEN ,  HARTMANN HEINRICH ,  KEMNA ANDREAS H ,  WICKEL STEFAN

IPC: A61F13/53 ,  A61F13/15 ,  A61F13/49 ,  B01J20/26 ,  C08F6/00 ,  C08J3/00

Abstract: Process for improving the water absorption capacity of crosslinked, water-swellable polymers by treating water-containing, finely divided polymer gels having a solids content of 20 to 65% by weight at temperatures of at least 50 DEG C with steam, the solids content of the water-containing polymer gels being increased by not more than 30% by weight and the polymer gels then being dried in a conventional manner.

公开(公告)号：DE3760674D1

公开(公告)日：1989-11-09

申请号：DE3760674

申请日：1987-03-17

Applicant: BASF AG

Inventor： NOWAKOWSKY BERNHARD HENRYK DR ,  BECK JUERGEN ,  HARTMANN HEINRICH DR ,  VAMVAKARIS CHRISTOS DR

IPC: A61L15/00 ,  A61L15/60 ,  C08F2/10 ,  C08F2/18 ,  C08F20/00 ,  C08F20/06 ,  C08F20/56 ,  C08F26/10

公开(公告)号：AU7042787A

公开(公告)日：1987-09-24

申请号：AU7042787

申请日：1987-03-20

Applicant: BASF AG

Inventor： NOWAKOWSKY BERNHARD HENRYK ,  BECK JUERGEN ,  HARTMANN HEINRICH ,  VAMVAKARIS CHRISTOS

IPC: A61L15/00 ,  A61L15/60 ,  C08F2/10 ,  C08F2/18 ,  C08F20/00 ,  C08F20/06 ,  C08F20/56 ,  C08F26/10 ,  C08F220/06

公开(公告)号：AU6414786A

公开(公告)日：1987-04-30

申请号：AU6414786

申请日：1986-10-17

Applicant: BASF AG

Inventor： NOWAKOWSKY BERNHARD HENRYK ,  BECK JUERGEN ,  HARTMAN HEINRICH ,  VAMVAKARIS CHRISTOS

IPC: B01J19/18 ,  C08F2/00 ,  C08F2/10 ,  C08F2/24 ,  C08F20/00 ,  C08F20/02 ,  C08F20/06 ,  C08F20/10 ,  C08F20/28 ,  C08F20/52 ,  C08F20/56 ,  C08F220/04 ,  C08F2/16 ,  C08F26/10

Abstract: Finely divided, gel-like crosslinked polymers are prepared by a continuous method in which a monomer mixture which contains, per 100 parts by weight of acrylic acid or methacrylic acid, from 50 to 100 mol % of which in each case are neutralized, acrylamide, methacrylamide or N-vinylpyrrolidone, from 0 to 30 parts by weight of other water-soluble monoethylenically unsaturated monomers and from 0 to 20 parts by weight of water-insoluble monoethylenically unsaturated monomers is copolymerized with from 0.01 to 5 parts by weight of a crosslinking agent, in 20-65% strength by weight aqueous solution in the presence of an initiator at from 45 DEG to 95 DEG C. in a single-screw cylindrical mixer whose stirrer shaft possesses disk segments which have, at the outer end, mixing bars which are arranged in a manner such that the substances fed in at the entrance of the mixer are conveyed in the axial direction to the exit of the mixer, the aqueous monomer solution in the mixer is polymerized under from 100 to 800 mbar, and some of the water is removed during the polymerization, so that a crumb-like gel having a solids content of from 30 to 70% by weight is discharged.