公开(公告)号：EP4063434A1

公开(公告)日：2022-09-28

申请号：EP21880290.8

申请日：2021-08-17

申请人： LG Chem, Ltd.

发明人： LEE, Junwye ,  HAN, Chang Hun ,  WON, Tae Young ,  SOHN, Jungmin ,  LEE, Hyemin ,  RYU, Jihye ,  KIM, Minsu

IPC分类号： C08J3/24 ,  C08J3/12 ,  C08J9/04

摘要： Provided is a method of preparing a superabsorbent polymer, which enables preparation of the superabsorbent polymer exhibiting an improved absorption rate while maintaining excellent absorption performances by minimizing a surface damage phenomenon of the superabsorbent polymer in a pneumatic conveying process during the preparation process of the superabsorbent polymer or in a pneumatic conveying process of the finally prepared superabsorbent polymer.

公开(公告)号：EP3919552A1

公开(公告)日：2021-12-08

申请号：EP20872956.6

申请日：2020-09-08

申请人： LG CHEM, LTD.

发明人： LEE, Junwye ,  WON, Tae Young ,  SOHN, Jungmin ,  LEE, Hyemin ,  SHIN, Kwangin ,  KIM, Minsu ,  HAN, Chang Hun

IPC分类号： C08J3/24 ,  C08J3/12 ,  C08F20/06 ,  C08F6/02

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

公开(公告)号：EP3819330A1

公开(公告)日：2021-05-12

申请号：EP19908136.5

申请日：2019-12-20

申请人： LG Chem, Ltd.

发明人： LEE, Hyemin ,  WON, Tae Young ,  SOHN, Jungmin ,  LEE, Junwye ,  HEO, Seongbeom ,  SHIN, Kwangin ,  HAN, Chang Hun

IPC分类号： C08J3/24 ,  C08J3/12 ,  C08K5/00 ,  C08F2/01

摘要： 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：EP4458885A1

公开(公告)日：2024-11-06

申请号：EP23903654.4

申请日：2023-07-17

申请人： LG Chem, Ltd.

发明人： LEE, Seul Ah ,  PARK, Sung Soo ,  JU, Jin Hyuck ,  LEE, Junwye ,  AHN, Taebin ,  KIM, Tae Yun ,  PARK, Dong Hoon ,  SHIN, Kwangin ,  WOO, Heechang ,  BAEK, Seokhyeon ,  HAN, Sangwon ,  JEE, Min Goo

IPC分类号： C08J3/24 ,  C08J3/12 ,  C08J3/075 ,  C08F4/40 ,  C08F20/06

摘要： The present disclosure relates to a preparation method for a super absorbent polymer capable of improving the absorption rate and overall absorption properties of the super absorbent polymer and effectively reducing extractable components and residual monomers by introducing a radical reaction system in a pulverization process.

公开(公告)号：EP4410874A1

公开(公告)日：2024-08-07

申请号：EP22920810.3

申请日：2022-12-14

申请人： LG Chem, Ltd.

发明人： KIM, Minsu ,  HAN, Chang Hun ,  WON, Tae Young ,  SOHN, Jungmin ,  LEE, Junwye ,  RYU, Jihye

IPC分类号： C08J3/24 ,  C08J3/12 ,  C08F2/50 ,  C08F220/18 ,  C08K5/053 ,  C08K5/109 ,  C08K5/1515 ,  C08J9/08

CPC分类号： C08J9/08 ,  C08F220/18 ,  C08K5/053 ,  C08J3/12 ,  C08J3/24 ,  C08K5/109 ,  C08F2/50 ,  C08K5/1515

摘要： The present disclosure relates to a preparation method of a super absorbent polymer. More specifically, it relates to a method for preparing a super absorbent polymer in which absorption properties of the finally prepared super absorbent polymer are improved by adjusting the timing of adding a reducing agent in the step of forming a hydrogel polymer through foam polymerization.

公开(公告)号：EP3763771A1

公开(公告)日：2021-01-13

申请号：EP19867685.0

申请日：2019-09-24

申请人： LG CHEM, LTD.

发明人： WON, Tae Young ,  LEE, Hyemin ,  LEE, Junwye ,  HEO, Seongbeom ,  SHIN, Kwangin ,  HAN, Chang Hun

IPC分类号： C08J3/24 ,  C08J3/12 ,  C08J3/075 ,  C08K5/00 ,  C08L101/14

摘要： 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.

公开(公告)号：EP4282904A1

公开(公告)日：2023-11-29

申请号：EP22911708.0

申请日：2022-12-08

申请人： LG Chem, Ltd.

发明人： LEE, Junwye

IPC分类号： C08J3/24 ,  C08J3/12

摘要： The present disclosure relates to a preparation method of a super absorbent polymer. More specifically, it relates to a preparation method of a super absorbent polymer, which can improve a drying efficiency in the preparation process and realize excellent absorption-related properties of the prepared super absorbent polymer by using a specific inorganic material in the reassembly process.

公开(公告)号：EP4269477A1

公开(公告)日：2023-11-01

申请号：EP22898922.4

申请日：2022-11-14

申请人： LG Chem, Ltd.

发明人： WON, Tae Young ,  LEE, Junwye ,  KIM, Minsu

IPC分类号： C08J3/24

摘要： Provided is a method of preparing a superabsorbent polymer. More particularly, provided is a method of preparing a superabsorbent polymer, in which degradation of physical properties of the polymer due to a mechanical force generated during a surface crosslinking process is minimized by controlling operating conditions of a surface crosslinking reactor in the step of surface crosslinking, thereby improving absorption properties of the superabsorbent polymer finally prepared.

公开(公告)号：EP3783053A1

公开(公告)日：2021-02-24

申请号：EP19893049.7

申请日：2019-10-01

申请人： LG CHEM, LTD.

发明人： WON, Tae Young ,  SOHN, Jungmin ,  LEE, Hyemin ,  LEE, Junwye ,  HEO, Seongbeom ,  SHIN, Kwangin ,  HAN, Chang Hun

IPC分类号： C08J9/12 ,  C08J9/16 ,  C08J3/12 ,  C08J3/24 ,  C08F2/01

摘要： 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 the steps of: 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.