公开(公告)号：US20240326014A1

公开(公告)日：2024-10-03

申请号：US18578177

申请日：2022-07-18

Applicant: LG Chem, Ltd.

Inventor： Woongchan Jeong ,  Yeonsoo Kim ,  Chang Hun Han ,  Jungmin Sohn ,  Myunghan Lee ,  Hyemin Lee ,  Jihye Ryu

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

CPC classification number: B01J20/267 ,  B01J20/28045 ,  B01J20/28085 ,  B01J20/3064 ,  B01J20/3085

Abstract: 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

Applicant: LG Chem, Ltd.

Inventor： Kihoon Kim ,  Hyemin Lee ,  Chang Hun Han ,  Jungmin Sohn

IPC: C08J9/08 ,  B01J20/26

CPC classification number: C08J9/08 ,  B01J20/26 ,  B01J20/261 ,  B01J2220/46 ,  C08J2201/026 ,  C08J2203/02

Abstract: 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

Applicant: LG Chem, Ltd.

Inventor： Tae Young Won ,  Hyemin Lee ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

IPC: C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08L101/14

CPC classification number: C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08L101/14 ,  C08J2323/06 ,  C08L2312/00

Abstract: 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

Applicant: LG Chem, Ltd.

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

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

Abstract: 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

Applicant: LG Chem, Ltd.

Inventor： Tae Young Won ,  Jungmin Sohn ,  Hyemin Lee ,  Junwye Lee ,  Seongbeom Heo ,  Kwangin Shin ,  Chang Hun Han

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

Abstract: 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

Applicant: LG CHEM, LTD.

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

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

Abstract: 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：US10767039B2

公开(公告)日：2020-09-08

申请号：US16286490

申请日：2019-02-26

Applicant: LG CHEM, LTD.

Inventor： Dong Kun Shin ,  Seo Hwa Kim ,  Byoung Il Kang ,  Chang Hun Han

IPC: C08L25/12 ,  C08L67/02 ,  C08L67/03 ,  C08L55/02 ,  C08L51/06 ,  C08F255/02 ,  C08F279/04 ,  C08L53/00 ,  C08L23/08

Abstract: The present invention provides a thermoplastic resin and a molded article using the same, wherein the thermoplastic resin comprises: (A) 10 parts by weight to less than 30 parts by weight of a butadiene-based graft copolymer; (B) 5 parts by weight or more to less than 30 parts by weight of an acrylate-based graft copolymer; (C) 35 parts by weight to 65 parts by weight of a vinyl cyanide-aromatic vinyl-based copolymer; (D) 1 part by weight to 10 parts by weight of an ethylene-alkyl acrylate-based copolymer elastomer based on the total 100 parts by weight of (A), (B), and (C); and (E) 1 part by weight to 10 parts by weight of a polyester-based elastomer.

公开(公告)号：US10570229B2

公开(公告)日：2020-02-25

申请号：US15739674

申请日：2016-11-02

Applicant: LG CHEM, LTD.

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

IPC: C08F212/10 ,  C08F6/10 ,  C08F2/38 ,  C08F2/04 ,  C08F2/44

Abstract: The present invention relates to a method of preparing a styrene-based resin having a low oligomer content and a styrene-based resin prepared thereby. The preparation method according to the present invention may prepare a styrene-based resin having a reduced oligomer content by using a polymerization initiator having a 1 hour half-life temperature, which is 5° C. to 25° C. lower than a temperature during polymerization, and controlling devolatilization conditions.

公开(公告)号：US20190194367A1

公开(公告)日：2019-06-27

申请号：US16329980

申请日：2018-06-26

Applicant: LG Chem, Ltd.

Inventor： Yong Hun Lee ,  Tae Young Won ,  Jun Wye Lee ,  Kwangin Shin ,  Chang Hun Han

IPC: C08F20/14 ,  C08J3/24 ,  C08J3/075 ,  C08J3/12 ,  C08K5/109 ,  C08K5/103 ,  C08K5/00

CPC classification number: C08F20/14 ,  C08J3/075 ,  C08J3/12 ,  C08J3/24 ,  C08J3/245 ,  C08J2333/04 ,  C08K3/00 ,  C08K3/011 ,  C08K5/00 ,  C08K5/0025 ,  C08K5/103 ,  C08K5/109

Abstract: Provided are a superabsorbent polymer having a high bulk density value and showing a reduction in unpleasant odors which may be caused by various additives included in a preparation process while basically maintaining excellent absorption performance and absorption rate, and a preparation method thereof.

公开(公告)号：US10174193B2

公开(公告)日：2019-01-08

申请号：US15508472

申请日：2016-06-17

Applicant: LG CHEM, LTD.

Inventor： Jae Bum Seo ,  Chang Hun Han ,  Dae Woo Lee ,  Jung Tae Park ,  Eun Jung Choi ,  Byoung Il Kang ,  Da Eun Sung ,  Gyu Sun Kim

IPC: C08L25/10 ,  C08L55/02 ,  C08F2/02 ,  C08F2/06 ,  C08F279/02 ,  C08F2/00

Abstract: The present invention relates to method for preparing a modified acrylonitrile-butadiene-styrene resin having excellent matteness, impact resistance, and heat resistance, as well as having a low total volatile organic compounds content, and to a modified acrylonitrile-butadiene-styrene resin prepared thereby.