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    ULTRATHIN FLUID-ABSORBENT ARTICLE
    43.
    发明申请
    ULTRATHIN FLUID-ABSORBENT ARTICLE 审中-公开

    公开(公告)号：US20170281422A1

    公开(公告)日：2017-10-05

    申请号：US15471281

    申请日：2017-03-28

    Applicant: BASF SE

    Inventor： Norbert Herfert ,  Somjate Sonkaew ,  Thomas Daniel ,  Tanyatorn Sitkhunthod

    IPC: A61F13/53 ,  A61L15/58 ,  A61L15/60 ,  B32B5/02 ,  A61L15/22 ,  B32B37/12 ,  B32B7/12 ,  B32B38/00 ,  A61F13/15 ,  A61L15/24

    Abstract: An absorbent core and an absorbent article respectively with improved properties, especially rewet performance, are disclosed. The absorbent core has at least two layers, wherein each layer comprising from 0 to 10% by weight fibrous material and from 90 to 100% by weight water-absorbent polymer particles, based on the sum of water-absorbent polymer particles and fibrous material. The surface-postcrosslinked water absorbent polymer particles within the upper layer have a sphericity of at least 0.89 and a CRC of at least 34 g/g. Preferably the water-absorbent polymer particles have a sphericity of at least 0.89 and the sum of the CRC and AUL (0.3 psi, 21 g cm−2) (EDANA 442.2-02) of the water absorbent polymer particles is at least 65 g/g.

    Color-Stable Superabsorbent
    45.
    发明申请
    Color-Stable Superabsorbent 审中-公开
    颜色稳定超吸收剂

    公开(公告)号：US20130256593A1

    公开(公告)日：2013-10-03

    申请号：US13853425

    申请日：2013-03-29

    Applicant: BASF SE

    Inventor： Norbert Herfert ,  Thomas Daniel ,  Klaus Dieter Hörner

    IPC: B01J20/26 ,  B01J20/30

    CPC classification number: B01J20/267 ,  A61L15/56 ,  A61L15/60 ,  B01J20/3021 ,  C08F8/40 ,  C08F220/06 ,  C08K5/0025 ,  C08K5/42 ,  C08K5/5317 ,  C08K5/5353

    Abstract: A superabsorbent obtainable by a process for producing superabsorbents by polymerizing a monomer solution comprising a) at least one ethylenically unsaturated monomer which bears acid groups and is optionally present at least partly in salt form, b) at least one crosslinker, c) at least one initiator, d) optionally one or more ethylenically unsaturated monomers copolymerizable with the monomers mentioned under a), e) optionally one or more water-soluble polymers, the process further comprising drying of the resulting polymer and optionally grinding of the dried polymer and sieving of the ground polymer and optionally surface postcrosslinking of the dried and optionally ground and sieved polymer, wherein at least one sulfonic acid derivative is added to the monomer mixture and/or to the polymer prior to the drying, and at least one phosphonic acid derivative is added to the polymer after the drying or optionally after the surface postcrosslinking, exhibits improved stability to discoloration in the course of storage at elevated temperatures or under elevated air humidity.

    Abstract translation: 通过聚合单体溶液来生产超吸收剂的方法可获得的超吸收剂，该单体溶液包含：a）至少一种带有酸基并且任选以至少部分为盐形式存在的烯属不饱和单体，b）至少一种交联剂，c）至少一种 引发剂，d）任选的一种或多种烯属不饱和单体，其可与a），e）所述的单体共聚，e）任选的一种或多种水溶性聚合物，该方法还包括干燥所得聚合物和任选地研磨干燥聚合物和筛分 研磨的聚合物和任选地表面后干燥和任选研磨和筛分的聚合物的后交联，其中在干燥之前将至少一种磺酸衍生物加入到单体混合物和/或聚合物中，并加入至少一种膦酸衍生物 在干燥之后或任选地在表面后交联之后的聚合物表现出改善的变色稳定性 在高温或高空气湿度下储存过程中。

    METHOD FOR DETERMINING CHARACTERISTICS OF SUPER-ABSORBENTS
    50.
    发明申请
    METHOD FOR DETERMINING CHARACTERISTICS OF SUPER-ABSORBENTS 有权

    公开(公告)号：US20220317006A1

    公开(公告)日：2022-10-06

    申请号：US17616705

    申请日：2020-06-24

    Applicant: BASF SE

    Inventor： Thomas Daniel ,  Markus Toennessen ,  Christophe Bauduin

    IPC: G01N5/02 ,  G01N15/08

    Abstract: In a method of measuring parameters of superabsorbents, the absorption capacity of superabsorbents is determined under pressure, by reducing the pressure applied to a sample of the superabsorbent stepwise and determining the absorption capacity at each pressure. In addition, the rise in absorption capacity after a reduction in pressure is measured as a function of time and this is used to calculate the swelling constant k or the characteristic swelling time τ. Swelling constant or characteristic swelling time or the magnitude of the difference in absorption capacity at two different pressures are used to determine further parameters of the superabsorbent.

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