公开(公告)号：DE59913529D1

公开(公告)日：2006-07-20

申请号：DE59913529

申请日：1999-11-18

Applicant: BASF AG

Inventor： RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  FRENZ VOLKER ,  DANIEL THOMAS ,  ENGELHARDT FRITZ

IPC: A21B1/22 ,  C08F8/30 ,  A21B1/44 ,  A61F13/53 ,  A61L15/60 ,  C08J3/24 ,  C08K5/353 ,  C08L101/00 ,  D04H1/42 ,  D06M15/263

Abstract: Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the surface postcrosslinking solution comprises as crosslinker a compound of the formula IwhereR1, R2, R3 and R4 are independently hydrogen, C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl or C1-C12-alkoxy,R5 is C1-C16-alkyl, C1-C4-hydroxyalkyl, C6-C12-aryl, C1-C16-alkenyl or a group of the formula -(CH2)n-COOH or -(CH2)n-SO3H in the form of the acid or a respective metal salt, ammonium salt or triethanolammonium salt thereof or -(CH2-CH2-O-)m-R6,R6 is hydrogen or C1-C16-alkyl,n is from 1 to 10,m is from 1 to 20dissolved in an inert solvent,and are used in hygiene articles, packaging materials and nonwovens.

公开(公告)号：ES2217814T3

公开(公告)日：2004-11-01

申请号：ES99948879

申请日：1999-09-28

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  HERFERT NORBERT ,  SCHLIWA RUDOLF ,  STIVEN UWE ,  ENGELHARDT FRITZ

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08F8/44 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/00 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08J3/12 ,  C09K3/00

Abstract: Water-swellable hydrophilic polymers are prepared by neutralization of the acidic hydrogel having a degree of neutralization of 0-40 mol % to an ultimate degree of neutralization of 60-85 mol % by mixing with a neutralizing agent in a mincer comprising a system of screw, rotating blade, restricted flow zone and breaker plate, whereinthe mincer has a power output of from 1000 to 6000 Wh/m3the hydrogel passes through a zone having-an energy dissipation density of from 400 to 800 W/1 of mixing volumethe average residence time of the hydrogel in the mincer is from 5 to 30 secondsthe breaker plate has an open area of from 20 to 40%.

公开(公告)号：ES2205788T3

公开(公告)日：2004-05-01

申请号：ES99910242

申请日：1999-02-19

Applicant: BASF AG

Inventor： FUNK RUDIGER ,  FRENZ VOLKER ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  ENGELHARDT FRITZ ,  DANIEL THOMAS

IPC: C07D263/20 ,  A61L15/00 ,  A61L15/60 ,  C08F8/30

公开(公告)号：DE59908768D1

公开(公告)日：2004-04-08

申请号：DE59908768

申请日：1999-09-28

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  HERFERT NORBERT ,  SCHLIWA RUDOLF ,  STUEVEN UWE ,  ENGELHARDT FRITZ

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08F8/44 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/00 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08J3/12 ,  C09K3/00

Abstract: Water-swellable hydrophilic polymers are prepared by neutralization of the acidic hydrogel having a degree of neutralization of 0-40 mol % to an ultimate degree of neutralization of 60-85 mol % by mixing with a neutralizing agent in a mincer comprising a system of screw, rotating blade, restricted flow zone and breaker plate, whereinthe mincer has a power output of from 1000 to 6000 Wh/m3the hydrogel passes through a zone having-an energy dissipation density of from 400 to 800 W/1 of mixing volumethe average residence time of the hydrogel in the mincer is from 5 to 30 secondsthe breaker plate has an open area of from 20 to 40%.

公开(公告)号：ES2216617T3

公开(公告)日：2004-10-16

申请号：ES99963322

申请日：1999-11-23

Applicant: BASF AG

Inventor： RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  FRENZ VOLKER ,  DANIEL THOMAS ,  ENGELHARDT FRITZ

IPC: A61F5/44 ,  A61F13/15 ,  A61F13/53 ,  A61F13/49 ,  A61L15/00 ,  C08F8/30 ,  C08J3/24 ,  C08K5/357 ,  C08L101/00

Abstract: Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the crosslinker comprises a compound of the formula Iwhere R is hydrogen, C1-C4-alkyl, C1-C4-hydroxyalkyl, trialkylsilyl or acetyl and R , R , R , R , R , R are each independently hydrogen, C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl, dissolved in an inert solvent, and are used in hygiene articles, packaging materials and nonwovens.

公开(公告)号：AT260946T

公开(公告)日：2004-03-15

申请号：AT99948879

申请日：1999-09-28

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  HERFERT NORBERT ,  SCHLIWA RUDOLF ,  STUEVEN UWE ,  ENGELHARDT FRITZ

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08F8/44 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/00 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08J3/12 ,  C09K3/00

Abstract: Water-swellable hydrophilic polymers are prepared by neutralization of the acidic hydrogel having a degree of neutralization of 0-40 mol % to an ultimate degree of neutralization of 60-85 mol % by mixing with a neutralizing agent in a mincer comprising a system of screw, rotating blade, restricted flow zone and breaker plate, whereinthe mincer has a power output of from 1000 to 6000 Wh/m3the hydrogel passes through a zone having-an energy dissipation density of from 400 to 800 W/1 of mixing volumethe average residence time of the hydrogel in the mincer is from 5 to 30 secondsthe breaker plate has an open area of from 20 to 40%.

公开(公告)号：DE59906512D1

公开(公告)日：2003-09-11

申请号：DE59906512

申请日：1999-02-19

Applicant: BASF AG

Inventor： FUNK RUEDIGER ,  FRENZ VOLKER ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  ENGELHARDT FRITZ ,  DANIEL THOMAS

IPC: C07D263/20 ,  A61L15/00 ,  A61L15/60 ,  C08F8/30

公开(公告)号：DE19854573A1

公开(公告)日：2000-05-31

申请号：DE19854573

申请日：1998-11-26

Applicant: BASF AG

Inventor： RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  FRENZ VOLKER ,  DANIEL THOMAS ,  ENGELHARDT FRITZ

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/00 ,  C08F8/30 ,  C08J3/24 ,  C08K5/357 ,  C08L101/00 ,  C08F8/00

Abstract: The invention relates to a method for the secondary cross-linking of gels or surfaces of water-absorbing polymers by treating the polymer with a surface secondary cross-linking agent and subsequently subjecting it to a secondary cross-linking reaction during or after the treatment by raising the temperature and drying the polymer. According to the invention, the cross-linking agent is a compound of formula (I), wherein R is hydrogen, C1-C4 alkyl, C1-C4 hydroxyalkyl, trialkylsilyl or acetyl and R , R , R , R , R , R independently is hydrogen, C1-C12 alkyl, C2-C12 alkenyl or C6-C12 aryl, dissolved in an inert solvent. The invention also relates to the liquid-absorbing polymers obtained by said method, to their use in hygiene items, packaging material and nonwovens.

公开(公告)号：DE19846413A1

公开(公告)日：2000-04-13

申请号：DE19846413

申请日：1998-10-08

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  HERFERT NORBERT ,  SCHLIWA RONALD ,  STUEVEN UWE ,  ENGELHARDT FRITZ

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08F8/44 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/00 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08J3/12 ,  C09K3/00 ,  C08F6/02

Abstract: Preparation of a water-swellable hydrophilic polymer (I) involves: (a) radical (co)polymerization of hydrophilic monomer(s) (II), or graft (co)polymerization of (II) onto a substrate, where the average degree of neutralization of acid monomers is 0-40 mol. %, (b) comminuting, (c) post-neutralizing (60-85 mol. %) in a shredder under specific conditions; (d) charging the particles to a band drier, without further mechanical shear; (e) drying; and (f) grinding and sieving. Preparation of a water-swellable hydrophilic polymer (I) involves: (a) radical (co)polymerization of one or more hydrophilic monomer(s) (II), or graft (co)polymerization of one or more (II) onto a substrate (III), where the average degree of neutralization of the monomers containing acid groups is 0-40 mol. %, (b) comminuting the acid hydrogel, (c) post-neutralizing to a final neutralization degree of 60-85 mol. % in a shredder of a system having a screw, rotating knives, damming zones and perforated disks, operating at an output of 1000-6000 Wh/m , energy dissipation density 400-800 W/l, dwell time 5-30 s and free hole surface 20-40% of the perforated disk; (d) charging the neutralized hydrogel particles to a band drier, without application of further mechanical shear force; (e) drying the particles in the band drier; and (f) grinding and sieving the dried hydrogel particles.

公开(公告)号：DE19846412A1

公开(公告)日：2000-04-13

申请号：DE19846412

申请日：1998-10-08

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  FUNK RUEDIGER ,  HERFERT NORBERT ,  WANIOR MARIOLA ,  ENGELHARDT FRITZ

IPC: A61F13/15 ,  A61F13/53 ,  A61L15/00 ,  A61L15/60 ,  B01J20/26 ,  C08F2/10 ,  C08F6/02 ,  C08F6/26 ,  C08F8/00 ,  C08F8/42 ,  C08F20/02 ,  C08F22/00 ,  C08F28/02 ,  C08F30/02 ,  C08F220/06 ,  C08F251/00 ,  C08F261/04 ,  C08F283/02 ,  C08F283/06 ,  C08F291/00 ,  C08F283/00

Abstract: A new hydrophilic, highly swellable hydrogel (I) is obtained by: (a) radical (co)polymerization of hydrophic monomer(s) (II), or graft (co)polymerization of (II) onto a substrate; (b) comminuting; (c) post-neutralizing; and (d) drying, grinding and sieving, and has characteristic centrifuge retention, swelling height on vertical absorption and extractable content properties. A novel hydrophilic, highly swellable hydrogel (I) is obtained by; (a) radical (co)polymerization of one or more hydrophic monomer(s) (II), or graft (co)polymerization of one or more (II) onto a substrate (III), where the average degree of neutralization of the monomers containing acid groups is 0-40 mol. %; (b) comminuting the acid hydrogel; (c) post-neutralizing to a final neutralization degree of 50-85 mol. %; (d) and drying, grinding and sieving the hydrogel particles. (I) has either: (i) a centrifuge retention for 0.9% aqueous sodium chloride solution of at least 29 g/g, a swelling height on vertical absorption (1 g) of at least 3.5 cm and an extractable content (16 hour value) of less than 5%; or (ii) a centrifuge retention for 0.9% aqueous sodium chloride solution of at least 23 g/g, a swelling height on vertical absorption (3 g) of at least 3.5 cm and an extractable content (16 hour value) of less than 4%.