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公开(公告)号：US20230330629A1
公开(公告)日：2023-10-19
申请号：US18008254
申请日：2021-11-17
申请人： LG Chem, Ltd.
发明人： Tae Young Won , Jungmin Sohn , Hyemin Lee , Jihye Ryu
IPC分类号： B01J20/28 , B01J20/32 , B01J20/26 , C08K7/02 , C08F220/06 , C08F222/10 , C08F2/44 , C08F2/26
CPC分类号： B01J20/28007 , B01J20/3282 , B01J20/261 , B01J20/28047 , C08K7/02 , C08F220/06 , C08F222/102 , C08F2/44 , C08F2/26 , C08K2201/004 , C08K2201/011 , B01J2220/68
摘要： A method of preparing a superabsorbent polymer and the superabsorbent polymer maintaining excellent basic absorption performances such as centrifuge retention capacity, while exhibiting improved gel strength and absorption rate are provided. The nanocellulose fiber is introduced during the preparation of the superabsorbent polymer to improve mechanical strength, to form a porous structure, and to rapidly absorb the surrounding water through capillary action and delivering the water to the inside of the superabsorbent polymer.
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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：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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公开(公告)号：US20210309777A1
公开(公告)日：2021-10-07
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 , C08J3/24 , C08J3/12 , C08J3/075
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：US20240326014A1
公开(公告)日：2024-10-03
申请号：US18578177
申请日：2022-07-18
申请人： LG Chem, Ltd.
发明人： Woongchan Jeong , Yeonsoo Kim , Chang Hun Han , Jungmin Sohn , Myunghan Lee , Hyemin Lee , Jihye Ryu
CPC分类号： B01J20/267 , B01J20/28045 , B01J20/28085 , B01J20/3064 , B01J20/3085
摘要： Provided is a method of preparing a superabsorbent polymer. More particularly, provided is a method of preparing a superabsorbent polymer, in which a multi-step foaming process using a foam stabilizer is performed to form a hierarchical bubble distribution in the superabsorbent polymer to be prepared, thereby preparing the superabsorbent polymer having excellent absorption rate and absorption performance.
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公开(公告)号：US20240238759A1
公开(公告)日：2024-07-18
申请号：US18280511
申请日：2023-02-08
申请人： LG Chem, Ltd.
发明人： Jihye Ryu , Jungmin Sohn , Tae Young Won
CPC分类号： B01J20/267 , B01J20/28047 , B01J20/3021 , B01J20/3064 , B01J20/3085
摘要： A preparation method for a super absorbent polymer capable of minimizing bubble loss during foam polymerization. According to the preparation method of the present disclosure, a large number of small and uniform pores are formed to produce a super absorbent polymer having a high surface area. Since the super absorbent polymer exhibits an excellent absorption rate, it can be used in various products requiring high absorption properties.
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公开(公告)号：US20240124671A1
公开(公告)日：2024-04-18
申请号：US18274586
申请日：2022-10-12
申请人： LG Chem, Ltd.
发明人： Kihoon Kim , Hyemin Lee , Chang Hun Han , Jungmin Sohn
CPC分类号： C08J9/08 , B01J20/26 , B01J20/261 , B01J2220/46 , C08J2201/026 , C08J2203/02
摘要： The present disclosure relates to a preparation method for a super absorbent polymer capable of minimizing bubble loss during foam polymerization by a radical polymerization method. According to the preparation method of the present disclosure, a super absorbent polymer having a high surface area can be manufactured by forming many small and uniform pores. Since it exhibits an excellent absorption rate, it can be used in various products requiring high absorption properties.
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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：US20240247110A1
公开(公告)日：2024-07-25
申请号：US18027543
申请日：2021-12-17
申请人： LG Chem, Ltd.
发明人： Hyemin Lee , Jungmin Sohn , Jihye Ryu , Chang Hun Han , Taebin Ahn
CPC分类号： C08J3/075 , C08J3/12 , C08J3/245 , C08J9/122 , C08K3/36 , C08K5/0025 , C08K5/098 , C08J2201/026 , C08J2205/022 , C08J2205/044 , C08J2333/02
摘要： The present disclosure relates to a super absorbent polymer and a method for preparing the same. More specifically, it relates to a super absorbent polymer including a plurality of micropores, specifically an average of 7 or more micropores per particle, having an average diameter of 100 μm or less and a maximum diameter of 300 μm or less, and thus exhibiting an improved absorption rate and a high surface tension, and a method for preparing the super absorbent polymer.
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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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