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    Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones
    5.
    发明专利
    Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones 未知

    公开(公告)号：AU2726199A

    公开(公告)日：1999-09-15

    申请号：AU2726199

    申请日：1999-02-24

    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 ,  C08G73/06 ,  C08J3/24

    Abstract: The invention contains a process for the surface postcrosslinking of water-absorbing polymers in which the polymers are treated with a surface postcrosslinking solution and during or after the treatment are postcrosslinked by means of an increase in temperature and are dried, wherein the crossiinker comprises a bis-2-oxazolidinone or a poly-2-oxazolidinone comprising structural units of the formulain which R1 is branched or unbranched C1-C18-alkylene, branched or unbranched C2-C18-alkenylene, C5-C18-cycloalkylene, phenylene, naphthylene, anthracenylene, hydrocarbon-substituted phenylene, naphthylene or anthracenylene or another substituted or unsubstituted C6-C18-arylene radical, R2 is branched or unbranched C1-C18-alkylene and n is an integer from 1 to 50 or a mixture of bis-2-oxazolidinones and poly-2-oxazolidinones dissolved in an inert solvent.

    HIDROGELES HIDROFILOS ALTAMENTE HINCHABLES ASI COMO UN PROCEDIMIENTO PARA SU OBTENCION Y SU EMPLEO.
    6.
    发明专利
    HIDROGELES HIDROFILOS ALTAMENTE HINCHABLES ASI COMO UN PROCEDIMIENTO PARA SU OBTENCION Y SU EMPLEO. 未知

    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 %.

    METHOD FOR BINDING PARTICULATE, WATER-ABSORBING, ACID GROUP-CONTAINING POLYMERS TO A BASE MATERIAL
    8.
    发明专利
    METHOD FOR BINDING PARTICULATE, WATER-ABSORBING, ACID GROUP-CONTAINING POLYMERS TO A BASE MATERIAL 未知

    公开(公告)号：AU2003236706A1

    公开(公告)日：2003-12-22

    申请号：AU2003236706

    申请日：2003-06-06

    Applicant: BASF AG

    Inventor： HOSS ULRIKE ,  FUNK RUDIGER

    IPC: C08L101/14 ,  A61L15/60 ,  C08F8/44 ,  D06M15/263 ,  D06M15/285 ,  D06M15/356 ,  C08J3/00

    Abstract: A process for binding particulate water-absorbing acid-functional polymers to a carrier material by means of compounds comprising amino groups, which comprises contacting the carrier material with particulate water-absorbing acid-functional polymers whose acid groups have been 0 to not more than 55 mol % neutralized with alkali metal and/or ammonium bases and then raising the degree of neutralization of these polymers to not less than 60 mol % by treatment with amino-containing compounds. The use of compounds comprising amino groups and selected from the group of the compounds consisting of the alkanolamines and compounds which contain ethyleneimine and/or vinylamine units to neutralize and bind particulate water-absorbing acid-functional polymers neutralized 0 to not more than 55 mol % with alkali metal and/or ammonium bases to a carrier material.

    METHOD FOR CROSS-LINKING HYDROGELS WITH BIS- AND POLY-2-OXAZOLIDINONES
    9.
    发明专利
    METHOD FOR CROSS-LINKING HYDROGELS WITH BIS- AND POLY-2-OXAZOLIDINONES 未知

    公开(公告)号：CA2319453A1

    公开(公告)日：1999-09-02

    申请号：CA2319453

    申请日：1999-02-24

    Applicant: BASF AG

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

    IPC: C07D263/20 ,  A61L15/00 ,  A61L15/60 ,  C08F8/30 ,  C08G73/06 ,  C08J3/24

    Abstract: The invention relates to a method for surface subsequent cross-linking of water absorbing polymers. The invention is characterized in that the polymers are treated with a surface subsequent cross-linking solution and are subsequently cross-linked and dried during or after treatment by increasing the temperature. The invention is additionally characterized in that the crosslinking agent contains a bis-2-oxazolidinone or a poly-2-oxazolidinone which is dissolved in an inert solvent and which comprises structural units of general formula (I), wherein R1 is a branched or unbranched C1-C18-alkylene, a branched or unbranched C2-C18-alkenylene, C5-C8-cycloalkylene, phenylene, naphthylene, anthracenylene, phenylene substituted with hydrocarbons, naphthylene or anthracenylene or another substituted or non-substituted C6-C18-arylene radical; R2 is a branched or unbranched C1-C18-alkylene, and; n is a whole number from 1 to 50. In addition, the cross-linking agent can also contain a mixture of bis-2-oxazolidinones and poly-2-oxazolidinones dissolved in an inert solvent.

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