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    VERFAHREN ZUR HERSTELLUNG WASSERABSORBIERENDER POLYMERPARTIKEL
    73.
    发明公开
    VERFAHREN ZUR HERSTELLUNG WASSERABSORBIERENDER POLYMERPARTIKEL 有权

    公开(公告)号：EP2274087A1

    公开(公告)日：2011-01-19

    申请号：EP09738002.6

    申请日：2009-04-14

    Applicant: BASF SE

    Inventor： WEISMANTEL, Matthias ,  FUNK, Rüdiger ,  BECKER, Ann ,  VAN MIERT, Leo

    IPC: B01F7/08 ,  C08F220/06

    CPC classification number: C08F220/06 ,  B01F7/081 ,  C08F222/1006 ,  F26B9/063 ,  F26B17/1491 ,  F26B25/002

    Abstract: The invention relates to a method for producing water-absorbing polymer particles, wherein a polymer gel is taken from a polymerization reactor, kept temporarily as a particulate polymer gel in a residence time container, removed by means of a first conveying device at the lower end of the residence time container and dried and wherein the temporarily stored particulate polymer gel in the residence time container is conveyed by means of at least a second conveying device above the first conveying device in the direction of the first conveying device.

    Abstract translation: 本发明涉及一种制备吸水聚合物颗粒的方法，其中聚合物凝胶从聚合反应器中取出，暂时作为粒状聚合物凝胶保留在停留时间容器中，借助第一输送装置在下端 并且其中暂停储存的粒状聚合物凝胶在停留时间容器中借助于第一输送装置上方的至少第二输送装置在第一输送装置的方向上输送。

    HERSTELLUNG EINES WASSERABSORBIERENDEN HARZES UNTER EINMISCHEN EINES TEILCHENFÖRMIGEN ADDITIVS
    79.
    发明公开
    HERSTELLUNG EINES WASSERABSORBIERENDEN HARZES UNTER EINMISCHEN EINES TEILCHENFÖRMIGEN ADDITIVS 有权
    制备吸水树脂混合下一个颗粒添加剂

    公开(公告)号：EP1969017A2

    公开(公告)日：2008-09-17

    申请号：EP06830841.0

    申请日：2006-12-28

    Applicant: BASF SE

    Inventor： STUEVEN, Uwe ,  DANIEL, Thomas ,  FUNK, Rüdiger ,  WEISMANTEL, Matthias ,  VAN ESBROECK, Dominicus ,  POSSEMIERS, Karl ,  HILLEBRECHT, Annemarie

    IPC: C08F2/00 ,  C08F2/44

    CPC classification number: C08F2/44 ,  C08F220/06 ,  C08F222/1006

    Abstract: The invention relates to a method for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and optionally at least one cross-linker, in a reactor. According to said method, at least one first fraction of a particulate additive is admixed to the reaction mixture before the reaction mixture reaches a dwell time of 40 % of the total dwell time in the reactor, and at least one second fraction of a particulate additive is admixed when the reaction mixture reaches a dwell time of 45 % or more of the total dwell time in the reactor. The additive is selected from the group of water-adsorbing resin powders, fillers and mixtures thereof, the total solids content of the monomer and the additive being 30 to 60 % by weight, the amount of the additive being 5 to 50 % by weight, based on the monomer, and the weight ratio of the first fraction to the second fraction of the additive being 10:1 to 1:5. The resin powder is constituted of, e.g., recycled fines. Bot the residual monomer content, especially the residual cross-linker content, and the content in extractable substances of the water-absorbing resin are reduced by the described manner of admixture. A high percentage of additives can be incorporated without deteriorating the properties of the water-absorbing resin so obtained. The additives form a sufficiently strong compound with the resin without excessive dust formation when the resin is exposed to mechanical stress.

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