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146 records (took 0.026 seconds)

    131.
    发明专利
    未知

    公开(公告)号：AT286915T

    公开(公告)日：2005-01-15

    申请号：AT01978432

    申请日：2001-10-17

    Applicant: BASF AG

    Inventor： HEIDE WILFRIED ,  WICKEL STEFAN ,  DANIEL THOMAS ,  STUEVEN UWE

    IPC: C08F2/01 ,  B01J19/20 ,  C08F2/04 ,  C08F2/10 ,  C08F8/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/56 ,  C08F290/06

    Abstract: The invention relates to a cross-linked, water-swellable polymer that contains polymerized into it moieties of a) water-soluble, monoethylenically unsaturated monomers, and b) 0.001 to 5 mole % based on the monomers a) of a cross-linking combination, b1) a first cross-linking agent with at least two (meth)acrylic ester moieties in the molecule and b2) a second cross-linking agent with at least two (meth)allyloxy moieties in the molecule, the molar ratio of b1) to b2) ranging from 0.7:1 to 10:1. The polymer according to the invention has a balanced property profile as regards absorptivity, gel strength, absorption speed and extractable componenents and can be advantageously produced by a continuous method.

    135.
    发明专利
    未知

    公开(公告)号：DE59908601D1

    公开(公告)日：2004-03-25

    申请号：DE59908601

    申请日：1999-11-23

    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

    Abstract: Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the crosslinker comprises a compound of the formula Iwhere R is hydrogen, C1-C4-alkyl, C1-C4-hydroxyalkyl, trialkylsilyl or acetyl and R , R , R , R , R , R are each independently hydrogen, C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl, dissolved in an inert solvent, and are used in hygiene articles, packaging materials and nonwovens.

    136.
    发明专利
    未知

    公开(公告)号：AT259834T

    公开(公告)日：2004-03-15

    申请号：AT99963322

    申请日：1999-11-23

    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

    Abstract: Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the crosslinker comprises a compound of the formula Iwhere R is hydrogen, C1-C4-alkyl, C1-C4-hydroxyalkyl, trialkylsilyl or acetyl and R , R , R , R , R , R are each independently hydrogen, C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl, dissolved in an inert solvent, and are used in hygiene articles, packaging materials and nonwovens.

    METHOD FOR PRODUCING POLYMERS
    137.
    发明专利
    METHOD FOR PRODUCING POLYMERS 未知

    公开(公告)号：AU2003250114A1

    公开(公告)日：2004-02-23

    申请号：AU2003250114

    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.

    CONTINUOUS PRODUCTION OF CROSSLINKED FINE PARTICLES OF POLYMER GEL
    140.
    发明专利
    CONTINUOUS PRODUCTION OF CROSSLINKED FINE PARTICLES OF POLYMER GEL 未知

    公开(公告)号：CA2390871A1

    公开(公告)日：2001-05-31

    申请号：CA2390871

    申请日：2000-11-10

    Applicant: BASF AG

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

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

    Abstract: The invention relates to a method for continuously producing cross-linked, fine-particle geleous polymerizates by copolymerizing: a) water-soluble, monoethylenically unsaturated monomers; b) 0.001 to 5 mol %, with regard to monomers (a), of monomers containing at least two ethylenically unsaturated double bonds, and; (c) 0 to 20 mol %, with regard to monomers (a), of water- insoluble monoethylenically unsaturated monomers in 20 to 80 wt. % of an aqueous solution in the presence of an initiator and at temperatures ranging from 0 to 140 ~C, whereby the aqueous solution of the monomers, together wit h the initiator and an inert gas, are continuously fed to a kneader-mixer havi ng at least two shafts which rotate parallel to the axis. A number of kneading and transport elements are situated on the shafts and deliver the substances , which are added at the entry to the kneader-mixer, in an axial direction to the end of the mixer. The inventive method is characterized in that the proportion of the heat dissipation effected by evaporating water out of the reaction mixture equals at least 5 % of the reaction heat, and the proportio n of the heat dissipation effected by product discharge equals at least 25 % o f the reaction heat, and the remaining heat dissipation is effected by cooling the reactor walls.

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