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    PRODUCTION OF POROUS, HYDROPHILIC AND HIGHLY SWELLING HYDROGEL
    2.
    发明专利
    PRODUCTION OF POROUS, HYDROPHILIC AND HIGHLY SWELLING HYDROGEL 失效

    公开(公告)号：JPH107830A

    公开(公告)日：1998-01-13

    申请号：JP7599297

    申请日：1997-03-27

    Applicant: HOECHST AG

    Inventor： FUNK RUEDIGER DR ,  HERFERT NORBERT DR ,  RIEGEL ULRICH

    IPC: C08J9/00 ,  C08J9/28

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a porous, hydrophilic and highly swelling hydrogel, capable of confirming pore diameters and a distribution of the pore diameters in a prescribed value by performing freeze drying (sublimation drying) of the hydrophilic and highly swelling hydrogel swelled by water. SOLUTION: This porous, hydrophilic and highly swelling hydrogel is produced by performing freeze drying of (A) the hydrophilic and highly swelling hydrogel swelled by water. The weight ratio of water to the hydrogel in the component A is preferably (2:1) to (500:1). The obtained hydrogel preferably has 2-15m /g BET specific surface area, 1.3×10 to 2×10 cm /g specific pore volume and 1.5-5cm /g×Å radius distribution of the pores. Thereby, the rate of swelling can be increased without causing a blocking of the gel.

    7.
    发明专利
    未知

    公开(公告)号：NO300643B1

    公开(公告)日：1997-06-30

    申请号：NO914252

    申请日：1991-10-30

    Applicant: HOECHST AG

    Inventor： HILLE MARTIN ,  WITTKUS HEINZ ,  TONHAUSER JUERGEN ,  ENGELHARDT FRITZ ,  RIEGEL ULRICH

    IPC: C04B24/16 ,  C04B24/26 ,  C08F20/52 ,  C08F26/02 ,  C08F26/10 ,  C08F220/58 ,  C08F226/04 ,  C08F226/10 ,  C08L33/24 ,  C08L33/26 ,  C08L39/00 ,  C08L39/02 ,  C09D17/00 ,  C09K8/04 ,  C09K8/24 ,  C09K8/46 ,  C09K8/487 ,  C08F226/00 ,  C09K7/02

    Abstract: The water-soluble copolymer comprises 5-90% by weight of groups of the formula in which R is hydrogen or methyl, R is C2-C10-alkylene, Me is ammonium or an alkali metal, 5-90% by weight of groups of the formula -CH=CH-CH2-N R R -CH2-CH=CH-X II in which X is a halogen, R and R , independently of one another, are C1-C6-alkyl, 0-60% by weight of groups of the formula in which R and R together are a propylene group which forms a pyrrolidone radical with inclusion of the radical and 0-30% by weight of groups of the formula -CHR -CHR - IV in which R is hydrogen or methyl, and R is CONH2, CON(CH3)2, cyano, SO3H, SO3Me, C6H4SO3H, C6H4SO3Me, CH2SO3H, CH2SO3Me, COOH, COOMe or carboxyl-C1-C15-alkyl, where Me is an ammonium cation or an alkali metal cation, and the components I to IV may be in any desired sequence. The copolymer is used as a water-binding additive for suspensions of solids, preferably for cement slurries, plaster slurries, mortar, drilling muds or pigment suspensions, or as a water-binding additive for aqueous salt solutions.

    8.
    发明专利
    未知

    公开(公告)号：AT133693T

    公开(公告)日：1996-02-15

    申请号：AT92119513

    申请日：1992-11-14

    Applicant: HOECHST AG

    Inventor： KUSSMAUL ULRICH DR ,  STUEVEN UWE ,  ENGELHARDT FRIEDRICH DR ,  MAYER MANFRED DR ,  RIEGEL ULRICH

    IPC: A61L15/00 ,  A61L15/60 ,  C08F251/00 ,  C08F283/06

    Abstract: The invention relates to hydrophilic, swellable graft polymers which comprise, in a random distribution, from 0.5 to 50% by weight of radicals of the formula I and radicals of the general formula II from 49 to 99% by weight of acid group-containing radicals of the general formula III and from 0.1 to 2% by weight of radicals of a crosslinking agent which are derived from monomers containing at least two olefinically unsaturated double bonds, where the radicals R to R , X and Y and n and m are defined as indicated in claim 1, to their preparation, and to their use as absorbents for water and aqueous solutions.

    9.
    发明专利
    未知

    公开(公告)号：MX9101832A

    公开(公告)日：1992-06-05

    申请号：MX9101832

    申请日：1991-10-29

    Applicant: HOECHST AG

    Inventor： HILLE MARTIN ,  WITTKUS HEINZ ,  TONHAUSER JURGEN ,  ENGELHARDT FRITZ ,  RIEGEL ULRICH

    IPC: C04B24/16 ,  C04B24/26 ,  C08F20/52 ,  C08F26/02 ,  C08F26/10 ,  C08F220/58 ,  C08F226/04 ,  C08F226/10 ,  C08L33/24 ,  C08L33/26 ,  C08L39/00 ,  C08L39/02 ,  C09D17/00 ,  C09K8/04 ,  C09K8/24 ,  C09K8/46 ,  C09K8/487 ,  B01F17/52 ,  C08G

    Abstract: The water-soluble copolymer comprises 5-90% by weight of groups of the formula in which R is hydrogen or methyl, R is C2-C10-alkylene, Me is ammonium or an alkali metal, 5-90% by weight of groups of the formula -CH=CH-CH2-N R R -CH2-CH=CH-X II in which X is a halogen, R and R , independently of one another, are C1-C6-alkyl, 0-60% by weight of groups of the formula in which R and R together are a propylene group which forms a pyrrolidone radical with inclusion of the radical and 0-30% by weight of groups of the formula -CHR -CHR - IV in which R is hydrogen or methyl, and R is CONH2, CON(CH3)2, cyano, SO3H, SO3Me, C6H4SO3H, C6H4SO3Me, CH2SO3H, CH2SO3Me, COOH, COOMe or carboxyl-C1-C15-alkyl, where Me is an ammonium cation or an alkali metal cation, and the components I to IV may be in any desired sequence. The copolymer is used as a water-binding additive for suspensions of solids, preferably for cement slurries, plaster slurries, mortar, drilling muds or pigment suspensions, or as a water-binding additive for aqueous salt solutions.

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