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公开(公告)号:CA2346492A1
公开(公告)日:2000-05-04
申请号:CA2346492
申请日:1999-10-14
Applicant: BASF AG
Inventor: SCHLIWA RUDOLF , STUVEN UWE , DENTLER JOACHIM , KLOTZSCHE HELMUT , HERFERT NORBERT
Abstract: The present invention relates to a complete drying method for hydrogels, whereby the following steps are carried out successively: a) the hydrogels a re contact dried or dried by convection, b) the hydrogels are pre-crushed, c) t he pre-crushed hydrogels are ground by means of a coarse crushing mill or a crushing roller mill, d) the damp elastic hydrogel particles are separated, e) the damp elastic hydrogel particles are finally dried.
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公开(公告)号:CA2345727A1
公开(公告)日:2000-04-20
申请号:CA2345727
申请日:1999-09-28
Applicant: BASF AG
Inventor: STUVEN UWE , ENGELHARDT FRITZ , SCHLIWA RUDOLF , DENTLER JOACHIM , HERFERT NORBERT
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: The invention relates to a method for producing water-swellable hydrophilic polymers by neutralising the acid hydrogel with a degree of neutralisation o f 0 40 mol. % to a final degree of neutralisation of 60 85 mol. % by mixing wi th a neutralising agent in an opener using a system consisting of a screw, a rotating blade, a restricted flow area and a breaker plate, the capacity of the opener being 1000 to 6000 Wh/m3, the hydrogel being guided through an ar ea with an energy dissipation density of 400 to 800 W/l mixing volume, the average residence time of the hydrogel in the opener being 5 to 30 seconds, and the free perforated surface of the breaker plate being 20 to 40 %.
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公开(公告)号:PL347244A1
公开(公告)日:2002-03-25
申请号:PL34724499
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%.
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公开(公告)号:MXPA01003429A
公开(公告)日:2001-07-01
申请号:MXPA01003429
申请日:2001-04-03
Applicant: BASF AG
Inventor: DENTLER JOACHIM , FUNK RUEDIGER , HERFERT NORBERT , WANIOR MARIOLA , ENGELHARDT FRIEDRICH
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
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5.
公开(公告)号:ES2228104T3
公开(公告)日:2005-04-01
申请号:ES99947451
申请日:1999-10-01
Applicant: BASF AG
Inventor: DENTLER JOACHIM , FUNK RUDIGER , HERFERT NORBERT , WANIOR MARIOLA , ENGELHARDT FRIEDRICH
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
Abstract: Hidrogel hidrófilo altamente hinchable a base de monómeros (co)polimerizados o a base de (co)polímeros de injerto, obtenido por a) (co)polimerización por medio de radicales de uno o varios monómeros hidrófilos de la fórmula en la cual R1 significa hidrógeno, metilo o etilo, R2 significa un grupo ¿COOR4. hidroxisulfonilo, fosfonilo, el grupo fosfonilo esterificado con alcanol con 1 a 4 átomos de carbono o un grupo de la fórmula general (II) R3 significa hidrógeno, metilo, etilo o el grupo carboxilo, R4 significa hidrógeno, aminoalquilo con 1 a 4 átomos de carbono o hidroxialquilo con 1 a 4 átomos de carbono, y R5 significa hidroxisulfonilo, fosfonilo o carboxilo, o (co)polimerización de injerto de uno o varios monómeros hidrófilos de la fórmula sobre una base de injerto, ascendiendo el grado medio de neutralización de los monómeros, que contienen grupos ácido, a un 0 hasta un 40 % en mol, b) trituración del hidrogel ácido, c) neutralización de hidrogel ácido hasta un grado terminal de neutralización de un 50 hasta un 85 % en mol mediante adición de un neutralizante, y d) secado, molienda y tamizado de las partículas de hidrogel, caracterizado porque el hidrogel -muestra una retención de centrífuga para una solución acuosa al 0, 9 % de NaCl de al menos 29 g/g, -una altura de hinchamiento a una absorción vertical (1 g) de al menos 3, 5 cm, y -un contenido de extraíble (valor de 16 h) menor de un 5 %, o -muestra una retención de centrífuga para una solución acuosa al 0, 9 % de NaCl de la menos 23 g/g, -una altura de hinchamiento a una absorción vertical (3 g) de al menos 5 cm, y -un contenido de extraíble (valor de 16 h) menor de un 4 %.
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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%.
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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%.
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公开(公告)号:DE59910531D1
公开(公告)日:2004-10-21
申请号:DE59910531
申请日:1999-10-01
Applicant: BASF AG
Inventor: DENTLER JOACHIM , FUNK RUEDIGER , HERFERT NORBERT , WANIOR MARIOLA , ENGELHARDT FRIEDRICH
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
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公开(公告)号:AT276288T
公开(公告)日:2004-10-15
申请号:AT99947451
申请日:1999-10-01
Applicant: BASF AG
Inventor: DENTLER JOACHIM , FUNK RUEDIGER , HERFERT NORBERT , WANIOR MARIOLA , ENGELHARDT FRIEDRICH
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
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公开(公告)号:MX220853B
公开(公告)日:2004-06-10
申请号:MXPA01003429
申请日:2001-04-03
Applicant: BASF AG
Inventor: DENTLER JOACHIM , FUNK RUEDIGER , HERFERT NORBERT , WANIOR MARIOLA , ENGELHARDT FRIEDRICH
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
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