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    3.
    发明专利
    未知

    公开(公告)号：ES2083059T3

    公开(公告)日：1996-04-01

    申请号：ES92119513

    申请日：1992-11-14

    Applicant: HOECHST AG

    Inventor： KUSSMAUL ULRICH DR ,  STUVEN 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.

    5.
    发明专利
    未知

    公开(公告)号：DE3338431A1

    公开(公告)日：1985-05-02

    申请号：DE3338431

    申请日：1983-10-22

    Applicant: HOECHST AG

    Inventor： HILLE MARTIN DR ,  FRIEDE WOLFGANG DR ,  WITTKUS HEINZ ,  ENGELHARDT FRIEDRICH DR ,  RIEGEL ULRICH

    IPC: C08F220/00 ,  C04B24/16 ,  C04B24/26 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F26/02 ,  C08F220/04 ,  C08F220/06 ,  C08F220/54 ,  C08F220/58 ,  C08F226/02 ,  C08F228/02 ,  C08F246/00 ,  C09K8/24 ,  C09K8/46

    Abstract: For the Contracting states BE, CH, DE, FR, GB, IT, LI, NL 1. A copolymer consisting of-9-95 % by weight of (meth)acrylic acid or ammonium or alkali metal salts thereof or partly hydrolysed (meth)acrylamide and of 5-95 % by weight of groups of the formula II, III or IV see diagramm : EP0141327,P6,F1 in which R**3 denotes hydrogen, C1 -C6 -alkyl or phenyl, R**4 denotes a hydrogen atom or CH3 , and R**5 denotes C1 -C10 -alkylene and K**+ denotes ammonium, lithium, sodium or potassium For the Contracting state AT 1. A process for the preparation of a copolymer consisting of 5-95 % by weight of (meth)acrylic acid or ammonium or alkali metal salts thereof or partly hydrolysed (meth)acrylamide and of 5-95 % by weight of groups of the formula II, III ou IV see diagramm : EP0141327,P6,F1 in which R**3 denotes hydrogen, C1 -C6 -alkyl or phenyl, R**4 denotes a hydrogen atom or CH3 , and R**5 denotes C1 -C10 -alkylene and K**+ denotes ammonium, lithium, sodium or potassium, characterized in that (meth)acrylic acid or ammonium or alkali metal salts thereof partly hydrolysed (meth)-acrylamide and the definitely unsaturated monomers on which the formulae II-IV are based are polymerized in the stated proportions.

    8.
    发明专利
    未知

    公开(公告)号：ES2079124T3

    公开(公告)日：1996-01-01

    申请号：ES92115391

    申请日：1992-09-09

    Applicant: HOECHST AG

    Inventor： ENGELHARDT FRIEDRICH DR ,  STUVEN UWE ,  MAYER MANFRED DR

    IPC: B01F3/12 ,  B29B7/30 ,  C08F8/00 ,  B29B7/10 ,  C08J3/12 ,  C08J3/20 ,  C08J3/24

    Abstract: The present invention relates to a process for modifying hydrophilic polymers by incorporating a modifier, characterised in that pulverulent polymer and the modifier are introduced continuously into a vertical, cylindrical mixer, mixed at a residence time of 1-10 s and a power of from 1,000 to 5,000 Wh/m powder by means of rotating blades at a blade frequency of from 100 to 300 s , while the powder passes through zones having energy dissipation densities of from 300 to 600 W/l of mixer volume.

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