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公开(公告)号：US20240058789A1
公开(公告)日：2024-02-22
申请号：US18271764
申请日：2022-11-14
申请人： LG Chem, Ltd.
发明人： Tae Young Won , Junwye Lee , Minsu Kim
IPC分类号： B01J20/26 , B01J20/28 , C08J3/24 , C08F220/06 , C08F222/10
CPC分类号： B01J20/267 , B01J20/261 , B01J20/28047 , C08J3/245 , C08F220/06 , C08F222/102 , B01J2220/68
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.
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公开(公告)号：US11718694B2
公开(公告)日：2023-08-08
申请号：US17271414
申请日：2019-12-20
申请人： LG Chem, Ltd.
发明人： Hyemin Lee , Tae Young Won , Jungmin Sohn , Junwye Lee , Seongbeom Heo , Kwangin Shin , Chang Hun Han
IPC分类号： C08F220/06 , C08J3/075 , C08J3/12 , C08J3/24
CPC分类号： C08F220/06 , C08J3/075 , C08J3/122 , C08J3/245 , C08J2333/02
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.
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公开(公告)号：US12030967B2
公开(公告)日：2024-07-09
申请号：US17057790
申请日：2019-10-01
申请人： LG Chem, Ltd.
发明人： Tae Young Won , Jungmin Sohn , Hyemin Lee , Junwye Lee , Seongbeom Heo , Kwangin Shin , Chang Hun Han
CPC分类号： C08F2/44 , B01J20/267 , B01J20/3064 , C08F2/01 , C08F220/06 , C08J3/245 , C08J9/08 , C08J9/36 , B01J2220/68 , C08J2201/026 , C08J2333/08
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: 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.
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公开(公告)号：US20230119016A1
公开(公告)日：2023-04-20
申请号：US17796055
申请日：2021-08-17
申请人： LG Chem, Ltd.
发明人： Junwye Lee , Chang Hun Han , Tae Young Won , Jungmin Sohn , Hyemin Lee , Jihye Ryu , Minsu Kim
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.
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公开(公告)号：US20210179790A1
公开(公告)日：2021-06-17
申请号：US16962947
申请日：2018-12-06
申请人： LG Chem, Ltd.
发明人： Junwye Lee , Chang Hun Lee , Kwangin Shin , Chang Hun Han , Sang Gi Lee
摘要： The present disclosure relates to a super absorbent polymer having a high water content and a method for preparing the same. The super absorbent polymer according to the present disclosure has a relatively high water content compared to a conventional one but has no degradation in absorption-related physical properties, and thereby can be used in various fields.
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公开(公告)号：US20240110018A1
公开(公告)日：2024-04-04
申请号：US18539951
申请日：2023-12-14
申请人： LG Chem, Ltd.
发明人： Tae Young Won , Hyemin Lee , Junwye Lee , Seongbeom Heo , Kwangin Shin , Chang Hun Han
IPC分类号： C08J3/075 , C08J3/12 , C08J3/24 , C08L101/14
CPC分类号： C08J3/075 , C08J3/12 , C08J3/24 , C08L101/14 , C08J2323/06 , C08L2312/00
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.
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公开(公告)号：US20240034844A1
公开(公告)日：2024-02-01
申请号：US18282393
申请日：2022-12-08
申请人： LG Chem, Ltd.
发明人： Junwye Lee
CPC分类号： C08J3/075 , C08J3/12 , C08J3/245 , C08J2333/02
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.
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公开(公告)号：US20210230316A1
公开(公告)日：2021-07-29
申请号：US17057790
申请日：2019-10-01
申请人： LG Chem, Ltd.
发明人： Tae Young Won , Jungmin Sohn , Hyemin Lee , Junwye Lee , Seongbeom Heo , Kwangin Shin , Chang Hun Han
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: 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.
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公开(公告)号：US11891487B2
公开(公告)日：2024-02-06
申请号：US17051859
申请日：2019-09-24
申请人： LG Chem, Ltd.
发明人： Tae Young Won , Hyemin Lee , Junwye Lee , Seongbeom Heo , Kwangin Shin , Chang Hun Han
IPC分类号： C08J3/075 , C08J3/12 , C08J3/24 , C08L101/14
CPC分类号： C08J3/075 , C08J3/12 , C08J3/24 , C08L101/14 , C08J2323/06 , C08L2312/00
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: 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.
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公开(公告)号：US20220145018A1
公开(公告)日：2022-05-12
申请号：US17598609
申请日：2020-09-08
申请人： LG Chem, Ltd.
发明人： Junwye Lee , Tae Young Won , Jungmin Sohn , Hyemin Lee , Kwangin Shin , Minsu Kim , Chang Hun Han
摘要： 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.
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