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    33.
    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
    34.
    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.

    35.
    发明专利
    未知

    公开(公告)号：AT328910T

    公开(公告)日：2006-06-15

    申请号：AT99958068

    申请日：1999-11-18

    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

    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 surface postcrosslinking solution comprises as crosslinker a compound of the formula IwhereR1, R2, R3 and R4 are independently hydrogen, C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl or C1-C12-alkoxy,R5 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 form of the acid or a respective metal salt, ammonium salt or triethanolammonium salt thereof or -(CH2-CH2-O-)m-R6,R6 is hydrogen or C1-C16-alkyl,n is from 1 to 10,m is from 1 to 20dissolved in an inert solvent,and are used in hygiene articles, packaging materials and nonwovens.

    38.
    发明专利
    未知

    公开(公告)号：BR0312290A

    公开(公告)日：2005-04-12

    申请号：BR0312290

    申请日：2003-06-20

    Applicant: BASF AG ,  PROCTER & GAMBLE

    Inventor： FRENZ VOLKER ,  GOERTH FELIX CHRISTIAN ,  STEPHAN OSKAR ,  WEIDL CHRISTIAN HUBERT ,  MERRIGAN STEVEN R ,  HUHN WOLFGANG EDGAR ,  GOLDMAN STEPHEN A ,  BECK MARTIN

    IPC: A61L24/00 ,  A61L26/00 ,  C08F2/38 ,  C08F20/04 ,  C09J133/02 ,  C09J201/00

    Abstract: The present invention relates to polymerized hydrogels and processes to make such hydrogels, in particular hydrogel adhesives which are capable of attaching to mammalian skin and can be used in various personal care products, such as waste-management articles, and a variety of functional articles to be worn by a human. The hydrogels described herein are characterized by very low amount of residual starting monomers, impurities, and/or by-products that could be formed during polymerization. Specifically, the hydrogels are made by adding scavengers and/or chain transfer agent prior to polymerization. It has been found, that upon addition of same scavengers the material properties of the polymerized hydrogel differ from the properties of gels polymerized without the scavenger. This is due to the fact, that these specific scavengers act also as chain transfer agents in the radical polymerization. Further studies showed that also chain transfer agents, that are no scanvengers for residual monomer(s), impurities or byproducts influence the material properties of the polymerized hydrogel adhesive.

    POLYMERIZED HYDROGEL ADHESIVES WITH HIGH LEVELS OF MONOMER UNITS IN SALT FORM
    40.
    发明专利
    POLYMERIZED HYDROGEL ADHESIVES WITH HIGH LEVELS OF MONOMER UNITS IN SALT FORM 未知

    公开(公告)号：AU2003270219A1

    公开(公告)日：2004-04-19

    申请号：AU2003270219

    申请日：2003-09-18

    Applicant: BASF AG

    Inventor： WEIDL CHRISTIAN HUBERT ,  GORTH FELIX CHRISTIAN ,  FRENZ VOLKER

    IPC: A61F13/00 ,  A61L15/58 ,  A61L15/60 ,  A61L24/04 ,  C09J133/02 ,  C09J201/08

    Abstract: The present invention relates to hydrogel adhesives which are capable of attaching to mammalian skin, exhibit excellent attachment and painless removal properties, and which show excellent stability upon storage at room temperature or even at elevated temperatures and for longer periods of time. The adhesive hydrogel described in the present invention can be used as body adhesive in products for e.g. personal care, medical devices, beauty care and a variety of functional articles to be worn by a human. The hydrogel adhesive of the invention comprises 10-60 wt. % of a cross-linked hydrophilic polymer, 5-80 wt. % of a water-soluble non-ionic humectant, and from about 10-85 wt. % water, wherein the hydrophilic polymer comprises at least 80 mole % of one or more weak-acid monomer units having a pKa above 3, the weak-acid monomer being more than 60 mole % in its salt form, the level of monomer in acid form in said hydrophilic polymer not exceeding 50 mole % of all monomer units and the hydrogel adhesive having a peel strength on PET of 0.3 to 5.0 N/cm and a stability index measured after 14 days SIx 14 below 0.50, preferably below 0.20, most preferably below 0.10.

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