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    SUPER ABSORBENT RESIN
    3.
    发明公开
    SUPER ABSORBENT RESIN 审中-公开
    超吸收性树脂

    公开(公告)号：EP3156427A1

    公开(公告)日：2017-04-19

    申请号：EP15806538.3

    申请日：2015-06-12

    申请人： LG Chem, Ltd.

    发明人： LEE, Hyemin ,  PARK, Sung Hyun ,  LEE, Myung Han ,  IM, Ye Hoon ,  KIM, Sang Eun

    IPC分类号： C08F20/10 ,  C08J3/075 ,  C08J3/24

    摘要： The present invention relates to a super absorbent polymer which exhibits totally well-balanced and excellent physical properties through the optimization of a centrifuge retention capacity, an absorbency under pressure, a liquid permeability and a gel strength. Such a super absorbent polymer is a super absorbent polymer comprising a cross-linked polymer in which a base polymer in the form of a powder obtained by polymerizing water-soluble ethylene-based unsaturated monomers having an acidic group in which at least a part thereof is neutralized is subjected to a surface crosslinking, and a centrifuge retention capacity (CRC), an absorbency under pressure (AUP), a liquid permeability (physiological saline solution flow conductivity; SFC), a horizontal gel strength (G') or the like can satisfy a predetermined relationship of formula.

    摘要翻译： 本发明涉及一种超吸收性聚合物，其通过优化离心保持能力，加压下吸收性，液体渗透性和凝胶强度而表现出完全平衡和优异的物理性能。 这种超吸收性聚合物是包含交联聚合物的超吸收性聚合物，其中通过聚合具有酸性基团的水溶性乙烯基不饱和单体获得的粉末形式的基础聚合物，其中至少一部分是 （AUP），液体渗透性（生理盐水溶液导流率; SFC），水平凝胶强度（G'）等可以进行表面交联 满足公式的预定关系。

    METHOD FOR PREPARING SUPERABSORBENT POLYMER
    5.
    发明公开
    METHOD FOR PREPARING SUPERABSORBENT POLYMER 审中-公开

    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.

    METHOD FOR PREPARING SUPER-ABSORBENT POLYMER
    7.
    发明公开
    METHOD FOR PREPARING SUPER-ABSORBENT POLYMER 审中-公开

    公开(公告)号：EP3770206A1

    公开(公告)日：2021-01-27

    申请号：EP19894696.4

    申请日：2019-11-18

    申请人： LG CHEM, LTD.

    发明人： SOHN, Jungmin ,  WON, Tae Young ,  LEE, Hyemin

    IPC分类号： C08J3/24 ,  C08J3/12 ,  C08F20/06 ,  C08F20/38 ,  C08F20/26 ,  C08F20/56 ,  C08L101/14 ,  C08L33/02 ,  C08L33/08

    摘要： The present disclosure relates to a preparation method of a super absorbent polymer capable of improving absorption performance of the super absorbent polymer by adding a simple additive later. The preparation method of a super absorbent polymer includes the steps of: forming a hydrogel polymer by cross-linking and polymerizing a water-soluble ethylene-based unsaturated monomer having at least partially neutralized acidic groups in the presence of 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, adding a monovalent to trivalent metal cation on the surface cross-linked base resin powder at a temperature of 25 °C to 80 °C, and maintaining and aging the resulting metal cation-added product at a temperature of 40 °C to 60 °C for 10 to 30 minutes.

    METHOD FOR PREPARING SUPER ABSORBENT POLYMER, AND SUPER ABSORBENT POLYMER
    8.
    发明公开
    METHOD FOR PREPARING SUPER ABSORBENT POLYMER, AND SUPER ABSORBENT POLYMER 审中-公开

    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.