公开(公告)号：US20240417281A1

公开(公告)日：2024-12-19

申请号：US18700153

申请日：2023-09-01

Applicant: LG CHEM, LTD.

Inventor： Sung Kyun KIM ,  Sung Kyu LEE ,  Min Wook LEE

IPC: C02F1/04 ,  C02F101/32 ,  C02F103/36 ,  C07C29/14 ,  C07C29/80 ,  C07C45/64

Abstract: A method for treating wastewater of a neopentyl glycol production process, the method including: recovering wastewater including a catalyst from one or more processes of an aldol purification process, a_neopentyl glycol purification process, and an extractant recovery process, and supplying the wastewater to a volatile organic compounds to a separation column; obtaining, from the separation column for volatile organic compound separation column; obtaining an upper discharge stream including the catalyst and a lower discharge stream including wastewater from which the catalyst has been removed in the volatile organic compound separation column; and supplying the lower discharge stream to a wastewater treatment system to treat the wastewater.

公开(公告)号：US20240092974A1

公开(公告)日：2024-03-21

申请号：US18254543

申请日：2022-09-14

Applicant: LG CHEM, LTD.

Inventor： Mi Eun KANG ,  Chan Hyo PARK ,  Jinyoung PARK ,  Chae Won PARK ,  Min Wook LEE

IPC: C08G73/10 ,  C08J5/18

CPC classification number: C08G73/1042 ,  C08G73/1067 ,  C08J5/18 ,  C08J2379/08

Abstract: The present disclosure relates to a polyimide-based resin film comprising a polyimide-based resin containing a polyimide repeating unit represented by Chemical Formula 1 and a polyimide repeating unit represented by Chemical Formula 2, a substrate for display device, and an optical device using the same.

公开(公告)号：US20240294710A1

公开(公告)日：2024-09-05

申请号：US18044100

申请日：2022-05-17

Applicant: LG CHEM, LTD.

Inventor： Mi Eun KANG ,  Ye Ji HONG ,  Chan Hyo PARK ,  Hangah PARK ,  Min Wook LEE

IPC: C08G73/10 ,  C08J5/18 ,  C08K5/523 ,  H10K77/10

CPC classification number: C08G73/1071 ,  C08G73/1032 ,  C08G73/1042 ,  C08G73/1067 ,  C08J5/18 ,  C08K5/523 ,  H10K77/111 ,  C08J2379/08

Abstract: The present disclosure relates to a polyimide-based resin film in which a refractive index difference (Δn) obtained by Equation 1 is 0.0068 or less, and a yellow index at a thickness of 10 μm is 5.5 or less, and a substrate for display device, and an optical device using the same.

公开(公告)号：US20230133697A1

公开(公告)日：2023-05-04

申请号：US17912351

申请日：2021-09-08

Applicant: LG CHEM, LTD.

Inventor： Min Wook LEE ,  Kyunghwan KIM ,  Chan Hyo PARK

IPC: C08L79/08 ,  C08G73/10 ,  C08J5/18 ,  G02B1/04

Abstract: The present disclosure relates to a polyimide-based polymer film comprising a polyimide-based polymer containing a polyimide repeating unit synthesized by the reaction of an acid anhydride compound having a specific structure and a diamine compound, wherein a glass transition temperature is 400° C. or more, and a thickness direction retardation value at a thickness of 10 μm is 150 nm or less, and a substrate for a display device and an optical device using the same.

公开(公告)号：US20230132166A1

公开(公告)日：2023-04-27

申请号：US17912345

申请日：2021-09-06

Applicant: LG CHEM, LTD.

Inventor： Min Wook LEE ,  Chan Hyo PARK

IPC: C08G73/10 ,  C08J5/18 ,  G02B1/04 ,  H05K1/03

Abstract: The present disclosure relates to a polyimide-based polymer film comprising a polyimide-based polymer containing a polyimide repeating unit synthesized by the reaction of an acid anhydride compound having a specific structure and a diamine compound, wherein an average transmittance at a wavelength of 380 nm or more and 780 nm or less is 60% or more, and a thickness direction retardation value at a thickness of 10 pm is 150 nm or less, and a substrate for a display device, a circuit board, an optical device, and an electronic device using the same.