公开(公告)号：DE19955861A1

公开(公告)日：2001-05-23

申请号：DE19955861

申请日：1999-11-20

Applicant: BASF AG

Inventor： HEIDE WILFRIED ,  WICKEL STEFAN ,  DANIEL THOMAS ,  NILGES JOACHIM ,  HOFMANN JUERGEN

IPC: B01J14/00 ,  B01J19/00 ,  B01J19/20 ,  C08F2/01 ,  C08F2/10 ,  C08F220/00 ,  C08F220/06 ,  C08F220/56

Abstract: In a process for the continuous production of crosslinked, finely-divided gel polymers by co polymerisation of water-soluble mono-unsaturated monomers and poly-unsaturated comonomers in a multi-screw mixer-kneader, at least 5% of the heat of reaction is removed by evaporation of water, at least 25% with the product and the rest by cooling the reactor. A process for the continuous production of crosslinked, finely-divided gel polymers (I) involves the co polymerisation of (a) water-soluble mono-unsaturated monomers, (b) 0.001-5 mol% (based on a) monomers with at least two ethylenic double bonds and (c) 0-20 mol% water-insoluble mono-unsaturated monomers in 20-80 wt% aqueous solution in presence of initiators at 0-140 deg C, by feeding the monomer solution with the initiator and inert gas into a mixer-kneader with at least two parallel rotating shafts fitted with several kneading and transporting elements to move the materials through the mixer. In this process, at least 5% of the heat of reaction is removed by evaporation of water from the reaction mixture, at least 25% is removed with the product and the rest is removed by cooling the reactor walls.

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：DE19807502A1

公开(公告)日：1999-09-16

申请号：DE19807502

申请日：1998-02-21

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 ,  C08J3/24 ,  B65D65/42 ,  B65D81/20 ,  C08F220/06 ,  D06M15/19

Abstract: The invention relates to a method for the gel-phase or surface secondary cross-linking of water-absorbent polymers, characterized in that the polymer is treated with a solution for surface secondary cross-linking, during or after treatment undergoes secondary cross-linking by temperature elevation and is then dried. Dissolved in an inert solvent the cross-linking agent contains a compound of formula (I), where R and R independently of each other are H, hydroxy, phenyl or C1-C6-alkyl, R is hydrogen, C1-C12-alkyl, C1-C12-alkenyl or C6-C12-aryl and R and R independently of each other are C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl, hydroxy, C1-C12-alkoxy or hydrogen. The invention also relates to water-absorbent polymers obtained according to the above method, and to their use in hygiene articles, packaging materials and non-woven materials.

公开(公告)号：AU2927199A

公开(公告)日：1999-09-06

申请号：AU2927199

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：CA2319786A1

公开(公告)日：1999-08-26

申请号：CA2319786

申请日：1999-02-18

Applicant: BASF AG

Inventor： FUNK RUDIGER ,  DANIEL THOMAS ,  FRENZ VOLKER ,  STUVEN UWE ,  ENGELHARDT FRIEDRICH

IPC: A61L15/00 ,  A61L15/60 ,  C07F7/07 ,  C08F8/42 ,  C08G85/00 ,  C08J3/24

Abstract: The invention relates to a method for surface cross-linking particles of superabsorbent polymers, characterized by the use of compounds of formula (1) as cross-linking agents, where R and R' independently of each other are hydrogen or C1-C6 alkyl.

公开(公告)号：CA2316342A1

公开(公告)日：1999-07-29

申请号：CA2316342

申请日：1999-01-20

Applicant: BASF AG

Inventor： RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  FUNK RUDIGER ,  ENGELHARDT FRITZ ,  DANIEL THOMAS ,  HERFERT NORBERT

IPC: C08J7/04 ,  B01J13/02 ,  B01J20/26 ,  C08F251/00 ,  C08F251/02 ,  C08J3/12 ,  C08L51/00 ,  C08L51/02

Abstract: The invention relates to a hydrogel, comprising a hydrophilic hydrogel with a high swelling capacity which is reversibly coated with a material which delays or prevents the uptake of water or aqueous fluids. The invention also relates to a method for producing the hydrogel and to a method for releasing said hydrophilic hydrogel with a high swelling capacity.

公开(公告)号：DE50308186D1

公开(公告)日：2007-10-25

申请号：DE50308186

申请日：2003-07-18

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  ELLIOTT MARK

IPC: C08F20/06

Abstract: A process for producing sodium acrylate polymers by free-radical polymerization of sodium acrylate with or without other monomers in an aqueous medium, which comprises using sodium acrylate in the form of an aqueous solution or dispersion obtainable by dissolving or dispersing solid sodium acrylate in an aqueous medium. The polymers thus obtainable have an improved color number and a lower residual monomer content than conventional comparable polymers.

公开(公告)号：ES2271690T3

公开(公告)日：2007-04-16

申请号：ES03794935

申请日：2003-08-25

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  ELLIOTT MARK ,  WEISMANTEL MATTHIAS ,  WENDKER MARTIN

IPC: B01J20/26 ,  A61L15/24 ,  C08L39/02 ,  A61L15/60 ,  C08J3/24 ,  C08L33/02 ,  C08L33/24 ,  C08L33/26 ,  C08L57/00 ,  C08L101/00 ,  C08L101/14

Abstract: Agente absorbente del agua, que comprende (a) partículas de un polímero absorbente del agua, y (b) un polímero nitrogenado, que contiene desde 5 hasta 17 mol/kg, referido al peso total del polímero nitrogenado, de átomos de nitrógeno protonizables.

公开(公告)号：DE102005001789A1

公开(公告)日：2006-07-27

申请号：DE102005001789

申请日：2005-01-13

Applicant: BASF AG

Inventor： WEISMANTEL MATTHIAS ,  FUNK RUEDIGER ,  DANIEL THOMAS ,  STUEVEN UWE

IPC: B07B1/00 ,  C08F6/04 ,  C08F20/06

公开(公告)号：DE102004038015A1

公开(公告)日：2006-03-16

申请号：DE102004038015

申请日：2004-08-04

Applicant: BASF AG

Inventor： EXNER KAI MICHAEL ,  DANIEL THOMAS ,  ELLIOTT MARK ,  RIEGEL ULRICH

IPC: C08J3/24 ,  A61L15/22 ,  C08F8/00 ,  C08K5/353

Abstract: Disclosed is a process for postcrosslinking a water absorbing polymer by the polymer being treated with at least one postcrosslinker and postcrosslinked and dried during or after the treatment by raising the temperature, the at least one postcrosslinker being a cyclic carbamate or a cyclic urea, wherein the cyclic carbamate or the cyclic urea was obtained by reacting respectively an aminoalcohol or a diamine with a cyclic carbonate.