公开(公告)号：US11286580B2

公开(公告)日：2022-03-29

申请号：US16491476

申请日：2018-09-27

Applicant: LG CHEM, LTD.

Inventor： Sang Jin Kim ,  Chang Hong Bak ,  Hye Jin Han ,  Ki Yeon Jo ,  Jeong Hun Cho ,  Joon Hee Cho

IPC: D01D1/02 ,  D01D10/02 ,  D01D10/06 ,  D01F1/10 ,  C01B32/05 ,  C08F222/30 ,  C08J5/00 ,  D01D5/06 ,  D01F6/18 ,  D01F9/22 ,  D01D5/04 ,  D01F6/38

Abstract: The present invention relates to a method for producing an acrylonitrile-based fiber, the method including: providing a polymer solution including an acrylonitrile-based copolymer containing a carboxylic acid group; mixing 100 parts by weight of the polymer solution with 1 to 6 parts by weight of a hydrophilization solution containing an organic solvent and ammonia water in a weight ratio of 95:5 to 60:40 to prepare a spinning stock solution; and spinning the spinning stock solution. The method controls the viscosity of the spinning stock solution to improve the stretchability and strength of the acrylonitrile-based fiber, and suppresses the occurrence of gelation.

公开(公告)号：US11214665B2

公开(公告)日：2022-01-04

申请号：US16468998

申请日：2017-12-27

Applicant: LG Chem, Ltd.

Inventor： Jae Hoon Choe ,  Jong Young Choi ,  Dong Cheol Choe ,  Hyun Ju Kim ,  Hyeon Hui Kim ,  Jung Yong Lee ,  Chan Joong Kim ,  Myung Han Lee ,  Hye Jin Han

IPC: C08K5/18 ,  C07C209/70 ,  C07C211/53 ,  C08F236/10

Abstract: A polymerization initiator composition includes isomers of the polymerization initiator, thereby preventing instability and inertness of the polymerization initiator and physical property degradation of the SSBR, minimizing by-products and unreacted materials, and remarkably improving a conversion ratio. In addition, when the polymerization initiator composition according to the present invention is used, there is no need to add a polar additive separately upon polymer polymerization, since the polar additive is already added at the time of preparing the polymerization initiator. Further, the polymer initiator composition has high polarity so that the hydrophobic SSBR and the hydrophilic silica can be effectively dispersed.

公开(公告)号：US11747318B2

公开(公告)日：2023-09-05

申请号：US16614687

申请日：2018-05-21

Applicant: LG CHEM, LTD.

Inventor： Jeong Yong Lee ,  Ji Eun Kim ,  Seung Ha Kim ,  Hye Jin Han ,  Dong Wook Lee ,  Myung Han Lee

IPC: G01N33/44 ,  C08L33/10 ,  C08K5/00 ,  C08K5/01 ,  C08K5/13 ,  C08K5/1545 ,  C08K5/3415 ,  C08K5/3432 ,  C08K5/3445 ,  C08K5/3492 ,  C08L25/06 ,  C08L27/16 ,  C08L31/04 ,  C08L33/08 ,  G01N21/64 ,  H10K50/00

CPC classification number: G01N33/442 ,  C08K5/0025 ,  C08K5/0041 ,  C08K5/01 ,  C08K5/13 ,  C08K5/1545 ,  C08K5/3415 ,  C08K5/3432 ,  C08K5/3445 ,  C08K5/34924 ,  C08L25/06 ,  C08L27/16 ,  C08L31/04 ,  C08L33/08 ,  C08L33/10 ,  G01N21/64 ,  H10K50/00 ,  C08L2203/16 ,  C08L2203/20 ,  G01N2201/06193

Abstract: The present application provides a resin composition which effectively inhibits a photobleaching phenomenon as well as realizes excellent external blocking properties and optical properties through the secondary structure transition concentration and relaxation time of the resin composition, a reliability evaluation method thereof, and a color conversion film comprising the same.

公开(公告)号：US20210230330A1

公开(公告)日：2021-07-29

申请号：US17265462

申请日：2019-11-01

Applicant: LG CHEM, LTD.

Inventor： Chang Hun Kim ,  Jong Gil Kim ,  Hyun Min Kim ,  Yeon Soo Kim ,  Jeong Hun Cho ,  Hye Jin Han ,  Joon Hee Cho

IPC: C08F220/46 ,  D01F9/22

Abstract: Provided is an acrylonitrile-based copolymer for a carbon fiber which includes a sulfonate-based monomer unit, a carboxylic acid-based monomer unit, and an acrylonitrile-based monomer unit, and the acrylonitrile-based copolymer for a carbon fiber includes the sulfonate-based monomer unit at 0.55 to 1.55 mol %, and the carboxylic acid-based monomer unit at 0.60 to 1.40 mol %.

公开(公告)号：US20190330447A1

公开(公告)日：2019-10-31

申请号：US16468998

申请日：2017-12-27

Applicant: LG Chem, Ltd.

Inventor： Jae Hoon Choe ,  Jong Young Choi ,  Dong Cheol Choe ,  Hyun Ju Kim ,  Hyeon Hui Kim ,  Jung Yong Lee ,  Chan Joong Kim ,  Myung Han Lee ,  Hye Jin Han

IPC: C08K5/18 ,  C08F236/10 ,  C07C211/53 ,  C07C209/70

Abstract: A polymerization initiator composition includes isomers of the polymerization initiator, thereby preventing instability and inertness of the polymerization initiator and physical property degradation of the SSBR, minimizing by-products and unreacted materials, and remarkably improving a conversion ratio. In addition, when the polymerization initiator composition according to the present invention is used, there is no need to add a polar additive separately upon polymer polymerization, since the polar additive is already added at the time of preparing the polymerization initiator. Further, the polymer initiator composition has high polarity so that the hydrophobic SSBR and the hydrophilic silica can be effectively dispersed.