中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

15 records (took 0.014 seconds)

    Super absorbent polymer and preparation method thereof
    3.
    发明授权
    Super absorbent polymer and preparation method thereof 有权

    公开(公告)号：US11718694B2

    公开(公告)日：2023-08-08

    申请号：US17271414

    申请日：2019-12-20

    Applicant: LG Chem, Ltd.

    Inventor： Hyemin Lee ,  Tae Young Won ,  Jungmin Sohn ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

    IPC: C08F220/06 ,  C08J3/075 ,  C08J3/12 ,  C08J3/24

    CPC classification number: C08F220/06 ,  C08J3/075 ,  C08J3/122 ,  C08J3/245 ,  C08J2333/02

    Abstract: The present disclosure relates to a super absorbent polymer and a preparation method of the same, which not only has excellent basic absorption performance, but also exhibits an improved absorption rate, and the like. The super absorbent polymer includes a base resin powder containing a first cross-linked polymer of a water-soluble ethylene-based unsaturated monomer having at least partially neutralized acidic groups; and a surface cross-linked layer containing a second cross-linked polymer in which the first cross-linked polymer is additionally cross-linked by a surface cross-linking agent on the base resin powder, wherein the super absorbent polymer contains less than 9.9% by number of super absorbent polymer particles having an aspect ratio, which is defined as shortest diameter/longest diameter of each super absorbent polymer particle, of less than 0.5, a vortex time is 5 to 55 seconds by a vortex method, and a surface tension is 50 to 80 mN/m.

    Preparation Method of Super Absorbent Polymer
    5.
    发明公开
    Preparation Method of Super Absorbent Polymer 审中-公开

    公开(公告)号：US20240139712A1

    公开(公告)日：2024-05-02

    申请号：US18276810

    申请日：2022-11-21

    Applicant: LG Chem, Ltd.

    Inventor： Jin Hyuck Ju ,  Hyungki Yoon ,  Kwangin Shin ,  Taebin Ahn

    IPC: B01J20/26 ,  B01J20/30 ,  B01J20/32

    CPC classification number: B01J20/267 ,  B01J20/3021 ,  B01J20/3085 ,  B01J20/321 ,  B01J20/3219 ,  B01J20/327 ,  C08F2810/20

    Abstract: Provided is a method of preparing a superabsorbent polymer, more particularly, a method of preparing a superabsorbent polymer, in which a cationic polymer is included as a surface crosslinking agent, thereby achieving excellent general absorption-related properties. There is also provided a superabsorbent polymer including a base polymer powder including a crosslinked polymer of a water-soluble ethylenically unsaturated monomer having acidic groups, of which at least part is neutralized; and a surface-crosslinked layer which is formed on the base polymer powder by further crosslinking the crosslinked polymer via a surface crosslinking agent, wherein the surface-crosslinked layer includes a cationic polymer including quaternary ammonium ions in repeating units.

    Preparation Method of Super Absorbent Polymer and Super Absorbent Polymer Therefrom
    7.
    发明公开
    Preparation Method of Super Absorbent Polymer and Super Absorbent Polymer Therefrom 审中-公开

    公开(公告)号：US20240110018A1

    公开(公告)日：2024-04-04

    申请号：US18539951

    申请日：2023-12-14

    Applicant: LG Chem, Ltd.

    Inventor： Tae Young Won ,  Hyemin Lee ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

    IPC: C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08L101/14

    CPC classification number: C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08L101/14 ,  C08J2323/06 ,  C08L2312/00

    Abstract: The present disclosure relates to a preparation method of a super absorbent polymer having excellent basic absorbency and liquid permeability at the same time by optimizing the degree of cross-linking of a base resin powder and a surface cross-linked layer, and a super absorbent polymer prepared therefrom. The preparation method of a super absorbent polymer includes the steps of: forming a hydrogel polymer by cross-linking and polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer having at least partially neutralized acidic groups and an internal cross-linking agent; drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; and forming a surface cross-linked layer by further cross-linking a surface of the base resin powder in the presence of a surface cross-linking agent, wherein the water-soluble ethylene-based unsaturated monomer has a degree of neutralization of less than 70 mol % in the step of forming a hydrogel polymer, and the preparation method further includes a step of further neutralizing the base resin powder by treating the base resin powder with a basic solution during the step of forming a surface cross-linked layer or after the step of forming a surface cross-linked layer.

    Preparation Method of Super Absorbent Polymer
    9.
    发明申请
    Preparation Method of Super Absorbent Polymer 有权

    公开(公告)号：US20210230316A1

    公开(公告)日：2021-07-29

    申请号：US17057790

    申请日：2019-10-01

    Applicant: LG Chem, Ltd.

    Inventor： Tae Young Won ,  Jungmin Sohn ,  Hyemin Lee ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

    IPC: C08F2/44 ,  C08J3/24 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08J9/08 ,  C08J9/36 ,  C08F220/06

    Abstract: The present disclosure relates to a preparation method of a super absorbent polymer capable of preparing a super absorbent polymer exhibiting an improved absorption rate while reducing an amount of a blowing agent used. The preparation method of a super absorbent polymer includes: preparing a monomer mixture including a water-soluble ethylene-based unsaturated monomer having at least partially neutralized acidic groups and an internal cross-linking agent; adjusting a dynamic pressure applied to the monomer mixture being transferred to 140 Pa or more by controlling a transfer rate while transferring the monomer mixture to a polymerization reactor; cross-linking and polymerizing the monomer mixture transferred to the polymerization reactor to form a hydrogel polymer; drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; and further cross-linking a surface of the base resin powder in the presence of a surface cross-linking agent to form a surface cross-linked layer.

Patent Agency Ranking