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    Production of a water-absorbing resin to which a particulate additive is admixed
    28.
    发明授权
    Production of a water-absorbing resin to which a particulate additive is admixed 失效
    生产混合有微粒添加剂的吸水性树脂

    公开(公告)号：US08349946B2

    公开(公告)日：2013-01-08

    申请号：US12861338

    申请日：2010-08-23

    Applicant: Uwe Stueven ,  Rüdiger Funk ,  Matthias Weismantel ,  Thomas Daniel ,  Annemarie Hillebrecht ,  Dominicus van Esbroeck ,  Karl J. Possemiers

    Inventor： Uwe Stueven ,  Rüdiger Funk ,  Matthias Weismantel ,  Thomas Daniel ,  Annemarie Hillebrecht ,  Dominicus van Esbroeck ,  Karl J. Possemiers

    IPC: C08G18/63

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

    Abstract: The invention relates to a process for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and, if appropriate, at least one crosslinker in a reactor, which comprises admixing the reaction mixture with at least one first portion of a particulate additive before the reaction mixture has reached a residence time of 40% of the overall residence time in the reactor and with at least one second portion of a particulate additive when the reaction mixture has reached a residence time of 45% or more of the overall residence time in the reactor, the additive being selected from water-absorbing resin powders, fillers and mixtures thereof, the total solids content of monomer and additive being in the range from 30% to 60% by weight, the amount of additive being in the range from 5% to 50% by weight, based on the monomers, and the weight ratio of the first portion to the second portion of the additive being in the range from 10:1 to 1:5. The resin powder is recycled fine-sized material for example. Not only the residual monomer content, specifically the residual crosslinker content, but also the level of extractables in the water-absorbing resin are reduced by the method of addition described. A high fraction of additives can be incorporated without the properties of the water-absorbing resin obtained being adversely affected. The additives enter a sufficiently firm bond with the resin, so that no excessive dusting occurs on exposure to mechanical stress.

    Abstract translation: 本发明涉及通过聚合包含至少一种亲水单体和如果合适的反应器中至少一种交联剂的反应混合物来生产吸水树脂的方法，其包括将反应混合物与至少一个第一部分 的反应混合物在反应混合物的停留时间达到总反应器停留时间的40％的停留时间和至少一个第二部分的颗粒状添加剂之前，当反应混合物达到45％或更多的停留时间时， 在反应器中的总停留时间，添加剂选自吸水树脂粉末，填料及其混合物，单体和添加剂的总固体含量在30重量％至60重量％的范围内，添加剂的量为 基于单体的5重量％至50重量％的范围，并且添加剂的第一部分与第二部分的重量比在10:1至 1：5。 树脂粉末是例如再循环的精细尺寸的材料。 通过所述的添加方法，不仅残留单体含量，特别是残留交联剂含量，而且吸水性树脂中的可萃取物的含量都降低。 可以并入高分数的添加剂，而不会对获得的吸水性树脂的性能产生不良影响。 添加剂与树脂进行足够牢固的粘合，使得在暴露于机械应力时不会发生过度的除尘。

    Method using a dry fluidized bed for producing thin, absorbent surface structures
    29.
    发明授权
    Method using a dry fluidized bed for producing thin, absorbent surface structures 有权
    使用干燥流化床制造薄的吸收性表面结构的方法

    公开(公告)号：US08063266B2

    公开(公告)日：2011-11-22

    申请号：US11818281

    申请日：2007-06-14

    Applicant: Wolfgang Heider ,  Jürgen Hofmann ,  Mariola Wanior ,  Rüdiger Funk ,  Ulrike Licht ,  Michael Ehle

    Inventor： Wolfgang Heider ,  Jürgen Hofmann ,  Mariola Wanior ,  Rüdiger Funk ,  Ulrike Licht ,  Michael Ehle

    IPC: A61F13/15 ,  A61F13/20

    CPC classification number: A61F13/534 ,  A61F13/15658 ,  A61F13/15699 ,  A61F13/15707 ,  A61F2013/15382 ,  A61L15/58 ,  Y10T442/2484 ,  Y10T442/277 ,  Y10T442/614 ,  C08L33/02 ,  C08L75/04

    Abstract: A process for producing thin absorbent planar structures which may be used in hygiene products such as diapers, incontinence products, wound contact materials or sanitary napkins to absorb body fluids, comprises the steps of: A) producing a mixture of an adhesive in dispersion form and a particulate absorbent by fluidizing the components, B) applying the mixture of adhesive and absorbent uniformly to the surface of one side of a first planar backing material, C) one side of a second planar backing material is applied to the mixture of adhesive and absorbent that is present on the surface of one side of the first planar backing material, so producing a sandwichlike intermediate, and D) the sandwichlike intermediate is processed to the end product at a temperature of at least 90° C., a pressure of from 4 to 50 bar, and a pressing time of from 0.5 to 5 min.

    Abstract translation: 用于生产可用于卫生产品如尿布，失禁产品，缠绕接触材料或卫生巾以吸收体液的薄吸收性平面结构的方法包括以下步骤：A）制备分散形式的粘合剂和 通过使组分流态化的颗粒吸收剂，B）将粘合剂和吸收剂的混合物均匀地施加到第一平面背衬材料的一侧的表面，C）将第二平面背衬材料的一侧施加到粘合剂和吸收剂的混合物 其存在于第一平面背衬材料的一侧的表面上，因此产生夹心状的中间体，D）将夹层状中间体在至少90℃的温度下加工成最终产物，压力为4 至50巴，加压时间为0.5至5分钟。

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