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

IPC分类号： B01J20/26 ,  B01J20/28 ,  B01J20/30

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.

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

IPC分类号： C08J9/08 ,  B01J20/26

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.

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.

公开(公告)号：US11466128B2

公开(公告)日：2022-10-11

申请号：US16649341

申请日：2019-06-11

申请人： LG Chem, Ltd.

发明人： Yong Hun Lee ,  Mookon Kim ,  Dae Woo Nam ,  Hyemi Nam ,  Sang Gi Lee ,  Chang Hun Lee ,  Jiyoon Jeong ,  Chang Hun Han

IPC分类号： C08J3/075 ,  C08K3/011 ,  C08J3/12 ,  C08J3/24 ,  C08J9/04 ,  C08L23/06 ,  C08L33/02

摘要： A superabsorbent polymer having optimized gel strength and exhibiting an improved absorption rate without increasing a specific surface area by chemical foaming or a physical method, and a preparation method thereof, are provided.

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

IPC分类号： C08F2/44 ,  C08J3/24 ,  B01J20/26 ,  B01J20/30 ,  C08F2/01 ,  C08J9/08 ,  C08J9/36 ,  C08F220/06

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.

公开(公告)号：US10696766B2

公开(公告)日：2020-06-30

申请号：US15776756

申请日：2017-09-06

申请人： LG CHEM, LTD.

发明人： Jae Bum Seo ,  Dae Woo Lee ,  Jung Tae Park ,  Gyu Sun Kim ,  Chang Hun Han

IPC分类号： C08F2/00 ,  C08F212/10 ,  C08F220/52 ,  C08F212/08 ,  C08F212/14 ,  C08F2/01 ,  C08F2/06 ,  C08F2/38 ,  C08F6/10 ,  C08K5/14 ,  C08K5/23 ,  C08K5/37

摘要： The present invention provides a styrene-acrylonitrile (SAN) resin that exhibits significantly improved thermal resistance and, at the same time, can be produced at high productivity and is highly processable and highly moldable; and a method of producing the same by preparing and storing the solution containing a mixture of an N-substituted maleimide monomer and an unsaturated nitrile monomer at a particular temperature, introducing the solution and a styrene polymer into the polymerization reactor separately, and maintaining the first polymerization reactor and the second polymerization reactor at particular respective temperatures, thereby significantly reducing the amounts of oligomers contained in the SAN resin.

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.

公开(公告)号：US11635421B2

公开(公告)日：2023-04-25

申请号：US16466890

申请日：2018-08-24

申请人： LG Chem, Ltd.

发明人： Yeon Soo Kim ,  Hye Mi Nam ,  Hyunsup Lee ,  Sang Gi Lee ,  Chang Hun Han ,  Myung Han Lee ,  Hyejin Han

IPC分类号： G01N33/32 ,  A61F13/53 ,  G01N15/08 ,  G01N15/00

摘要： A SAP evaluation apparatus includes: a main body installed with a lifting bar that is raised or lowered; a container portion installed under the lifting bar in the main body and having an internal containing space for containing an absorber; an operating portion connected to the lifting bar and having a lifting plate that is raised or lowered within the containing space and applies pressure to the absorber and an injection portion for injecting an ink in the direction of the absorber; a dispersion measurement portion for measuring the dispersion of the ink through the absorber; and a controller installed at the main body to measure absorption of the ink into the absorber and measure swelling capacity of the absorber while the ink is injected into the absorber.

公开(公告)号：US20210040271A1

公开(公告)日：2021-02-11

申请号：US16649341

申请日：2019-06-11

申请人： LG Chem, Ltd.

发明人： Yong Hun Lee ,  Mookon Kim ,  Dae Woo Nam ,  Hyemi Nam ,  Sang Gi Lee ,  Chang Hun Lee ,  Jiyoon Jeong ,  Chang Hun Han

IPC分类号： C08J3/075 ,  C08J3/24 ,  C08J3/12 ,  C08L33/02 ,  C08L23/06 ,  C08K3/011 ,  C08J9/04

摘要： A superabsorbent polymer having optimized gel strength and exhibiting an improved absorption rate without increasing a specific surface area by chemical foaming or a physical method, and a preparation method thereof, are provided.

公开(公告)号：US10053569B2

公开(公告)日：2018-08-21

申请号：US14909942

申请日：2015-04-08

申请人： LG CHEM, LTD.

发明人： Byoung Il Kang ,  Chang Hun Han ,  Eun Jung Choi ,  Da Eun Sung

IPC分类号： C08L25/16 ,  C08F212/12

CPC分类号： C08L25/16 ,  C08F212/12 ,  C08F220/44 ,  C08F226/06 ,  C08L55/02 ,  C08L51/04

摘要： Provided is a styrene resin composition including α-methyl styrene, acrylonitrile and vinyl imidazole, and having an improved conversion rate while maintaining excellent mechanical and chemical properties, a styrene resin composition including the same, and a styrene resin molded product manufactured therefrom. Accordingly, the heat-resistant styrene copolymer is effective in improving a conversion rate without deformation and mechanical and chemical property decline of the material itself, and as a result, commercialization may be readily accomplished due to enhanced productivity. In addition, the styrene resin molded product manufactured from the styrene resin composition according to the present invention includes the heat-resistant styrene copolymer as a matrix copolymer, and therefore, has excellent impact strength, tensile strength, tensile elongation and flowability while having high heat resistance.