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    21.
    发明专利
    未知

    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.

    29.
    发明专利
    未知

    公开(公告)号：BR0208502A

    公开(公告)日：2004-04-20

    申请号：BR0208502

    申请日：2002-03-15

    Applicant: PROCTER & GAMBLE ,  BASF AG

    Inventor： MERRIGAN STEVE RAY ,  GOLDMANN STEPHEN ALLEN ,  STRUILLOU ARNAUD PIERRE ,  GORTH FELIX CHRISTIAN ,  FRENZ VOLKER ,  BECKER MARTIN

    IPC: C08F2/50 ,  A61L24/06 ,  C08F20/58 ,  C09J11/06 ,  C09J133/26 ,  A61L24/04

    Abstract: The present invention relates to polymerized hydrogel adhesives, in particular those wherein the hydrogel is formed from monomers which include acrylamido-2-methane propanesulfonic acid or salts thereof (AMPS monomers) and those which contain glycerol as a humectant. In such adhesives, the levels of unpolymerized residual monomers, such as unpolymerized AMPS, acrylonitrile, acrylamide and t-butyl acrylamide; and the levels of other impurities such as acrolein, are kept very low. The present invention also relates to a process for making hydogel adhesives with very low levels of such unwanted materials. Such a process involves preparation of reaction mixtures under selected pH and/or temperature conditions and polymerization of AMPS monomers using selected conditions of pH and UV curing.

    30.
    发明专利
    未知

    公开(公告)号：DE59906513D1

    公开(公告)日：2003-09-11

    申请号：DE59906513

    申请日：1999-02-24

    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 ,  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.

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