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 %.

公开(公告)号：MX225754B

公开(公告)日：2005-01-24

申请号：MXPA01005256

申请日：2001-05-25

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  HERFERT NORBERT ,  ENGELHARDT FRIEDRICH

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/18 ,  A61L15/60 ,  C08F2/44 ,  C08F20/04 ,  C08K3/34

Abstract: The invention relates to hydrogels capable of absorbing aqueous fluids, which hydrogels are produced by polymerization of olefinically unsaturated carboxylic acids or their derivatives. The hydrogels are characterized in that before, during or after the polymerization reaction and before drying a silicic acid alkali salt of the general formula (I) M2O×nSiO2 is added to the polymerization reaction mixture. In said formula M is an alkali metal and n is a number between 0.5 and 4. The hydrogel obtained in this way is then dried at an elevated temperature. The invention also relates to a method for producing said hydrogels and to their use for absorbing aqueous fluids.

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：DE59909423D1

公开(公告)日：2004-06-09

申请号：DE59909423

申请日：1999-11-18

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  HERFERT NORBERT ,  ENGELHARDT FRIEDRICH

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/18 ,  A61L15/60 ,  C08F2/44 ,  C08F20/04 ,  C08K3/34

Abstract: The invention relates to hydrogels capable of absorbing aqueous fluids, which hydrogels are produced by polymerization of olefinically unsaturated carboxylic acids or their derivatives. The hydrogels are characterized in that before, during or after the polymerization reaction and before drying a silicic acid alkali salt of the general formula (I) M2O×nSiO2 is added to the polymerization reaction mixture. In said formula M is an alkali metal and n is a number between 0.5 and 4. The hydrogel obtained in this way is then dried at an elevated temperature. The invention also relates to a method for producing said hydrogels and to their use for absorbing aqueous fluids.

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：BR0116621A

公开(公告)日：2003-12-23

申请号：BR0116621

申请日：2001-12-28

Applicant: BASF AG

Inventor： FRENZ VOLKER ,  HERFERT NORBERT ,  RIEGEL ULRICH ,  VOLZ WILLIAM E ,  MAJETTE THOMAS H ,  HILL JAMES M

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/60 ,  B01J20/26 ,  C08J3/12 ,  A61L15/18

Abstract: The invention relates to non-water soluble hydrogels which can swell in water, and which are coated with steric or electrostatic spacers. Before being coated, the hydrogels comprise the following characteristics: absorbency under load (AUL) (0.7 psi) of at least 20 g/g, and gel strength of at least 1600 Pa. The coated hydrogels preferably have the following characteristics: centrifuge retention capacity (CRC) of at least 24 g/g, saline flow conductivity (SFC) of at least 30 x 10 cm s/g, and free swell rate (FSR) of at least 0.15 g/g s and/or a maximum vortex time of 160 s.

公开(公告)号：CA2433044A1

公开(公告)日：2002-07-11

申请号：CA2433044

申请日：2001-12-28

Applicant: BASF AG

Inventor： HILL JAMES M ,  FRENZ VOLKER ,  MAJETTE THOMAS H ,  HERFERT NORBERT ,  VOLZ WILLIAM E ,  RIEGEL ULRICH

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/60 ,  B01J20/26 ,  C08J3/12 ,  A61L15/18

Abstract: The invention relates to non-water soluble hydrogels which can swell in wate r, and which are coated with steric or electrostatic spacers. Before being coated, the hydrogels comprise the following characteristics: absorbency und er load (AUL) (0.7 psi) of at least 20 g/g, and gel strength of at least 1600 P a. The coated hydrogels preferably have the following characteristics: centrifu ge retention capacity (CRC) of at least 24 g/g, saline flow conductivity (SFC) of at least 30 x 10-7 cm3 s/g, and free swell rate (FSR) of at least 0.15 g/g s and/or a maximum vortex time of 160 s.

公开(公告)号：MXPA01007454A

公开(公告)日：2001-12-01

申请号：MXPA01007454

申请日：2001-07-24

Applicant: BASF AG

Inventor： FUNK RUEDIGER ,  HERFERT NORBERT ,  WANIOR MARIOLA ,  BROWN PATRICIA D ,  ENGELHARDT FRIEDRICH ,  WOODRUM GUY T

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/60 ,  B01J20/26 ,  B01J20/30 ,  C08F8/00 ,  C08F20/06 ,  C08F20/58 ,  C08F22/02 ,  C08F22/38 ,  C08F28/02 ,  C08F220/04 ,  C08F291/00 ,  C08J3/12 ,  C08J3/24

公开(公告)号：MXPA01005256A

公开(公告)日：2001-09-01

申请号：MXPA01005256

申请日：2001-05-25

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  HERFERT NORBERT ,  ENGELHARDT FRIEDRICH

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/18 ,  A61L15/60 ,  C08F2/44 ,  C08F20/04 ,  C08K3/34

Abstract: The invention relates to hydrogels capable of absorbing aqueous fluids, which hydrogels are produced by polymerization of olefinically unsaturated carboxylic acids or their derivatives. The hydrogels are characterized in that before, during or after the polymerization reaction and before drying a silicic acid alkali salt of the general formula (I) M2O×nSiO2 is added to the polymerization reaction mixture. In said formula M is an alkali metal and n is a number between 0.5 and 4. The hydrogel obtained in this way is then dried at an elevated temperature. The invention also relates to a method for producing said hydrogels and to their use for absorbing aqueous fluids.

公开(公告)号：ES2271287T3

公开(公告)日：2007-04-16

申请号：ES02745400

申请日：2002-06-21

Applicant: BASF AG

Inventor： FUNK RUDIGER ,  HERFERT NORBERT ,  WANIOR MARIOLA ,  STUVEN UWE ,  BECK MARTIN

IPC: C08F20/06 ,  C08F220/04 ,  A61L15/00 ,  D04H1/40 ,  D06M15/263

Abstract: Polímeros formadores de hidrogeles absorbentes de fluidos acuosos, teniendo los polímeros un índice de absorbencia de pH pHAI, que se calcula como sigue pHAI = A pH u (AUL0.7 psi + CRC) con A pH = 7-pH del producto correspondiente AUL0.7 psi corresponde a la absorción a presión de 0.7 psi CRC corresponde a la capacidad de retención centrífuga de al menos 80, y con un pH no superior a 5, 7.