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    PROCESS FOR PRODUCING SUPERABSORBENT PARTICLES
    21.
    发明申请
    PROCESS FOR PRODUCING SUPERABSORBENT PARTICLES 有权

    公开(公告)号：US20250041828A1

    公开(公告)日：2025-02-06

    申请号：US18694478

    申请日：2022-09-16

    Applicant: BASF SE

    Inventor： Thomas Daniel ,  Sebastian Marius Raupp ,  Monte Alan Peterson ,  Vernon Lynn Adey ,  Karl Possemiers

    IPC: B01J20/26 ,  B01J20/28 ,  B01J20/30

    Abstract: A process for producing surface postcrosslinked superabsorbent particles, wherein an aqueous monomer solution with a small amount of initiator is polymerized to give a polymer gel, the resultant polymer gel is extruded through a die plate, the extruded polymer gel is dried on an air circulation belt drier having one or more zones, and the resultant polymer particles are ground and classified and then thermally surface postcrosslinked, wherein the temperatures of the drying gas supplied in the course of drying in the forward zones of the air circulation belt drier are from 120 to 160° C., and the speeds of the air supplied are from 1.2 to 3.0 m/s.

    Fluid-absorbent article
    22.
    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
    25.
    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.

    Ultrathin fluid-absorbent article
    26.
    发明授权
    Ultrathin fluid-absorbent article 有权

    公开(公告)号：US10806640B2

    公开(公告)日：2020-10-20

    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 ,  A61L15/22 ,  A61L15/24 ,  A61L15/60 ,  A61L15/58

    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.

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