公开(公告)号：US11891487B2

公开(公告)日：2024-02-06

申请号：US17051859

申请日：2019-09-24

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: forming a hydrogel polymer by cross-linking and polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer having a degree of neutralization of less than 72 mol % and an internal cross-linking agent; drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; 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; and further neutralizing the base resin powder by treating the base resin powder with a basic solution during or after forming a surface cross-linked layer.

公开(公告)号：US20220145018A1

公开(公告)日：2022-05-12

申请号：US17598609

申请日：2020-09-08

Applicant: LG Chem, Ltd.

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

IPC: C08J3/24 ,  C08F20/06 ,  C08J3/12

Abstract: According to the method for preparation of a super absorbent polymer according to of the present disclosure, fine particles present in the prepared super absorbent polymer are removed, thereby solving a dispersion problem of the fine particles and a problem of reduction in the physical properties of the super absorbent polymer.

公开(公告)号：US20210309777A1

公开(公告)日：2021-10-07

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 ,  C08J3/24 ,  C08J3/12 ,  C08J3/075

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.

公开(公告)号：US20210230376A1

公开(公告)日：2021-07-29

申请号：US17051859

申请日：2019-09-24

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

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 forming a hydrogel polymer by cross-linking and polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer having a degree of neutralization of less than 72 mol % and an internal cross-linking agent; drying, pulverizing and classifying the hydrogel polymer to form a base resin powder; 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 and further neutralizing the base resin powder by treating the base resin powder with a basic solution during or after forming a surface cross-linked layer.

公开(公告)号：US10894844B2

公开(公告)日：2021-01-19

申请号：US16329980

申请日：2018-06-26

Applicant: LG Chem, Ltd.

Inventor： Yong Hun Lee ,  Tae Young Won ,  Jun Wye Lee ,  Kwangin Shin ,  Chang Hun Han

IPC: C08J3/24 ,  C08J3/075 ,  C08J3/12 ,  C08F20/14 ,  C08K3/18 ,  C08K3/22 ,  C08K3/28 ,  C08K5/092 ,  C08K5/109 ,  C08K5/103 ,  C08K5/00 ,  C08K3/00 ,  C08K3/011

Abstract: Provided are a superabsorbent polymer having a high bulk density value and showing a reduction in unpleasant odors which may be caused by various additives included in a preparation process while basically maintaining excellent absorption performance and absorption rate, and a preparation method thereof.