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    METHOD FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES WITH IMPROVED PROPERTIES
    23.
    发明申请
    METHOD FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES WITH IMPROVED PROPERTIES 有权
    生产具有改进性能的吸水聚合物颗粒的方法

    公开(公告)号：US20150119531A1

    公开(公告)日：2015-04-30

    申请号：US14407490

    申请日：2013-06-21

    Applicant: BASF SE

    Inventor： Christophe Bauduin ,  Thomas Daniel ,  Asif Karim

    IPC: C08J3/24 ,  A61L15/42 ,  A61L15/24

    CPC classification number: C08J3/245 ,  A61L15/22 ,  A61L15/24 ,  A61L15/42 ,  A61L15/60 ,  C08F6/008 ,  C08J2333/02

    Abstract: The present invention relates to a process for producing water-absorbing polymer particles having an improved profile of properties, comprising thermal surface postcrosslinking in the presence of a salt of a polyvalent metal cation and a complexing anion and subsequent aftertreatment, the aftertreatment comprising coating with a salt of a polyvalent metal cation and a non-complexing anion, and remoisturization with further drying.

    Abstract translation: 本发明涉及具有改进的性能特征的吸水性聚合物颗粒的制造方法，其包括在多价金属阳离子的盐和络合阴离子存在下的热表面后交联和随后的后处理，后处理包括用 多价金属阳离子和非络合阴离子的盐，并进一步干燥进行再润湿。

    Fluid-absorbent article
    24.
    发明授权
    Fluid-absorbent article 有权

    公开(公告)号：US12042365B2

    公开(公告)日：2024-07-23

    申请号：US16482045

    申请日：2018-02-12

    Applicant: BASF SE

    Inventor： Thomas Daniel ,  Christophe Bauduin ,  Katrin Baumann ,  Katarzyna Dobrosielska-Oura

    IPC: A61F13/15 ,  A61F13/537 ,  A61L15/60 ,  A61F13/53

    CPC classification number: A61F13/537 ,  A61L15/60 ,  A61F2013/530708

    Abstract: A fluid-absorbent article includes an upper liquid-pervious layer (A), a lower liquid-impervious layer (B), a fluid-absorbent core (C) between (A) and (B) including at least 60% by weight of non-surface postcrosslinked fluid-absorbent polymer particles and not more than 40% by weight of fibrous material, based on the sum of non-surface postcrosslinked fluid-absorbent polymer particles and fibrous material. An acquisition-distribution layer (D) between (A) and (C) includes at least 90% by weight of synthetic fibers and not more than 10% by weight of cellulose based fibers, based on the sum of synthetic fibers and cellulose based fibers. The basis weight of the acquisition-distribution layer (D) is at least 70 gsm. The fluid-absorbent polymer particles have a saline flow conductivity (SFC) of less than 5×10−7 cm3s/g and an AUHL of less than 15 g/g. Preferably the acquisition-distribution layer (D) is a non-woven web including a three dimensional network of fibers.

    Permeable Superabsorbent and Process for Production Thereof
    26.
    发明申请
    Permeable Superabsorbent and Process for Production Thereof 有权

    公开(公告)号：US20210016247A1

    公开(公告)日：2021-01-21

    申请号：US17043764

    申请日：2019-04-01

    Applicant: BASF SE

    Inventor： Christophe Bauduin ,  Thomas Daniel

    IPC: B01J20/26 ,  C08F220/06 ,  B01J20/08 ,  B01J20/30 ,  A61L15/60 ,  A61L15/24 ,  A61L15/54 ,  A61L15/18

    Abstract: A highly permeable superabsorbent is prepared by a process comprising
    polymerizing an aqueous monomer solution comprising a) at least one ethylenically unsaturated monomer which bears acid groups and is optionally 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), and e) optionally one or more water-soluble polymers; drying the resulting polymer, optionally grinding the dried polymer and sieving the ground polymer, optionally surface postcrosslinking the dried and optionally ground and sieved polymer, wherein, after drying, grinding or sieving, and, if surface postcrosslinking is conducted, during or after this surface postcrosslinking, x-ray-amorphous aluminum hydroxide powder is added.

    DEVICE AND METHOD FOR PRODUCING POWDERED POLYMERS
    27.
    发明申请
    DEVICE AND METHOD FOR PRODUCING POWDERED POLYMERS 审中-公开

    公开(公告)号：US20200231711A1

    公开(公告)日：2020-07-23

    申请号：US16488659

    申请日：2018-02-26

    Applicant: BASF SE

    Inventor： Stephan Bauer ,  Markus Toennessen ,  Christophe Bauduin ,  Katrin Baumann ,  Marco Krüger ,  Andreas Daiss ,  Markus Muehl

    IPC: C08F2/01 ,  B01J19/24 ,  B01J8/24 ,  B01J19/18 ,  B01J19/00 ,  C08F220/14

    Abstract: An apparatus for production of pulverulent polymers having a reactor for droplet polymerization with an apparatus for dropletization of a monomer solution for the preparation of the polymer. The apparatus for dropletization has holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point at the periphery of the reactor and a fluidized bed, wherein at least one of the following is fulfilled: an apparatus for increasing turbulence in the gas flow is disposed in the region of the apparatus for dropletization of the monomer solution, an apparatus for increasing turbulence in the gas flow is disposed in the region of the addition point for the gas, the addition point for gas is configured such that elevated turbulence is generated. A process for producing pulverulent polymers, in which an increase in flow turbulence in the gas flow in the region of the apparatus for dropletization also is disclosed.

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