公开(公告)号：US20240301200A1

公开(公告)日：2024-09-12

申请号：US18569869

申请日：2023-02-27

Applicant: LG CHEM, LTD.

Inventor： Jeong Hun CHO ,  Yujin An ,  Minchang SUNG ,  Wan Kyu OH

IPC: C08L67/04 ,  C08K5/3462

CPC classification number: C08L67/04 ,  C08K5/3462 ,  C08L2201/06 ,  C08L2201/10 ,  C08L2205/025 ,  C08L2205/24

Abstract: A polylactide resin composition that is used in combination with a specific nucleating agent, the composition being excellent in crystallinity degree and excellent in dispersibility between components and thus also is excellent in transparency. Accordingly, it is possible to maintain the properties inherent in the polylactide resin while having excellent processability.

公开(公告)号：US20210301051A1

公开(公告)日：2021-09-30

申请号：US17266078

申请日：2019-11-01

Applicant: LG CHEM, LTD.

Inventor： Jong Gil KIM ,  Chang Hun KIM ,  Jeong Hun CHO ,  Hyun Min KIM ,  Joon Hee CHO ,  Hyo Yong KIM

IPC: C08F220/46 ,  C01B32/05 ,  D01F9/22

Abstract: Provided is a method of preparing an acrylonitrile-based copolymer for a carbon fiber, which comprises: preparing a reaction solution including a monomer mixture comprising a sulfonate-based monomer represented by Chemical Formula 1, a carboxylic acid-based monomer, and an acrylonitrile-based monomer and an organic solvent; and subjecting the reaction solution to polymerization, wherein the monomer mixture comprises the sulfonate-based monomer represented by Chemical Formula 1 at 0.55 to 1.6 mol %.

公开(公告)号：US20240270938A1

公开(公告)日：2024-08-15

申请号：US18568775

申请日：2023-02-27

Applicant: LG CHEM, LTD.

Inventor： Jeong Hun CHO ,  Jeongkyu LEE ,  Yujin AN ,  Yeonji CHOE ,  Sung Joon OH ,  Wan Kyu OH

IPC: C08K5/3462 ,  C08K5/11

CPC classification number: C08K5/3462 ,  C08K5/11 ,  C08K2201/018

Abstract: Provided is a polylactide resin composition that is used in combination with a specific nucleating agent, wherein the composition is excellent in crystallization half-life and crystallinity degree, and thus can maintain the properties inherent in the polylactide resin while having excellent processability.

公开(公告)号：US20240262981A1

公开(公告)日：2024-08-08

申请号：US18565864

申请日：2023-02-27

Applicant: LG CHEM, LTD.

Inventor： Yujin AN ,  Jeong Hun CHO ,  Minchang SUNG ,  Wan Kyu OH

IPC: C08K5/09

CPC classification number: C08K5/09

Abstract: Provided is a polylactide resin composition prepared by combining specific nucleating agents and heat-treating them, and is characterized by having an excellent crystallinity degree. The polylactide resin composition comprises a polylactide resin, a first nucleating agent, and a second nucleating agent heat-treated at 25 to 120° C. for 1 to 30 minutes, wherein the first nucleating agent is uracil or orotic acid, and the second nucleating agent is a compound containing a lactide oligomer structure.

公开(公告)号：US20200149196A1

公开(公告)日：2020-05-14

申请号：US16335076

申请日：2017-11-22

Applicant: LG CHEM, LTD.

Inventor： Jeong Kyu LEE ,  Chang Hun KIM ,  In Young SONG ,  Jeong Hun CHO ,  Jong Soo DO ,  Sung Joon OH ,  Joon Hee CHO

IPC: D01F9/22 ,  C08F220/44 ,  C08F220/04 ,  C08F220/18

Abstract: The present invention relates to a method for producing a polyacrylonitrile-based fiber, wherein the method polymerizes a monomer mixture including an acrylonitrile-based monomer, a carboxylic acid-based comonomer, and an acrylate-based comonomer, wherein the acrylate-based comonomer includes the steps of producing a polyacrylonitrile-based copolymer so as to be included in an amount of 4 to 20 parts by weight based on 100 parts by weight of the monomer mixture, fiberizing the polyacrylonitrile-based copolymer, oxidizing and stabilizing the fiberized polyacrylonitrile-based copolymer, which may control the oxidation stabilization reaction, particularly the cyclization reaction. Accordingly, the energy consumption of the oxidation stabilization reaction may be reduced, economical efficiency of the production of polyacrylonitrile-based fiber may be obtained, and the physical and mechanical properties of the carbon fiber may be improved.

公开(公告)号：US20190315889A1

公开(公告)日：2019-10-17

申请号：US16469030

申请日：2018-09-14

Applicant: LG CHEM, LTD.

Inventor： Jeong Hun CHO ,  Young Soo SONG ,  Hyun Min KIM ,  Chang Hun KIM ,  Hyo Yong KIM ,  Joon Hee CHO

IPC: C08F2/01 ,  C08F2/06 ,  C08F20/44 ,  D01F9/22

Abstract: The present invention relates to a method of preparing a (meth)acrylonitrile-based polymer for preparing a carbon fiber, which comprises adding a reaction solution comprising a (meth)acrylonitrile-based monomer and a reaction solvent to a reactor to perform solution polymerization, performing solution polymerization under a condition in which a power consumption of the reactor is 1 to 5 kW/m3 when the reaction solution in the reactor has a viscosity of 0.1 poise or more and 250 poise or less, and performing solution polymerization under a condition in which a power consumption of the reactor is 8 to 13 kW/m3 when the reaction solution in the reactor has a viscosity of more than 250 poise and 450 poise or less.