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    51.
    发明专利
    未知

    公开(公告)号：DE19854574A1

    公开(公告)日：2000-05-31

    申请号：DE19854574

    申请日：1998-11-26

    Applicant: BASF AG

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

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

    Abstract: The invention relates to a method for the secondary gel and/or surface cross-linking of water-absorbent polymers, according to which the polymers are treated with a surface cross-linking solution and during or after this treatment subjected to secondary cross-linking and drying by temperature elevation. The method is characterized in that as cross-linking agent the solution for secondary surface cross-linking contains, dissolved in an inert solvent, a compound of formula (I) in which R , R , R , R independently of each other are hydrogen, C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl or C1-C12-alkoxy; R 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 acid form or in the form of their metal salts, ammonium salts or triethanol ammonium salts or -(CH2-CH2-O-)m-R ; R is hydrogen or C1-C16-alkyl; n is a number between 1 and 10; and m is a number between 1 and 20. The invention also relates to the liquid-absorbent polymers obtained in this manner and to their use in hygiene articles, packaging materials and nonwovens.

    Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones
    52.
    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.

    57.
    发明专利
    未知

    公开(公告)号：BRPI0507132A

    公开(公告)日：2007-06-19

    申请号：BRPI0507132

    申请日：2005-01-18

    Applicant: BASF AG

    Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  ELLIOTT MARK

    IPC: C08F20/00 ,  C08F220/06

    Abstract: (Meth)acrylate salt polymers are prepared by free-radical polymerization of (meth)acrylate salt with or without other monomers in an aqueous medium by using a supersaturated aqueous solution of (meth)acrylate salt. The resulting highly concentrated reaction mixtures are notable for their high solids content and increased space-time yield.

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