公开(公告)号：US20220251056A1

公开(公告)日：2022-08-11

申请号：US17611057

申请日：2020-09-03

Applicant: LG CHEM, LTD.

Inventor： Dayoung LEE ,  Ki Jae LEE ,  Mooho HONG ,  Young Young HWANG ,  Youngwook SON ,  Daehyeon HWANG

IPC: C07D307/68 ,  C07D333/38 ,  C08G64/24 ,  C08G64/08 ,  C08G63/64 ,  C08G64/30

Abstract: Provided are a diol compound which may be used to prepare a polycarbonate having excellent weather resistance, hardness, heat resistance, transparency, impact resistance, etc. while having excellent mechanical properties, a polycarbonate prepared by using the same, and a preparation method thereof.

公开(公告)号：US20210292550A1

公开(公告)日：2021-09-23

申请号：US17262112

申请日：2019-08-19

Applicant: LG CHEM, LTD.

Inventor： Byoungkue JEON ,  Young In YANG ,  Daehyeon HWANG ,  Mooho HONG ,  Ki Jae LEE ,  Youngwook SON

IPC: C08L69/00 ,  C08K5/17 ,  G02B1/04 ,  C08G64/06

Abstract: The present disclosure relates to a polycarbonate resin composition exhibiting excellent heat stability and optical properties, and an optical molded article comprising the same. The polycarbonate resin composition includes polycarbonate resin; and [[4-(dimethylamino)phenyl]methylene] propanedioic acid dimethyl ester as a hindered amine UV absorber that selectively absorbs UVA having a wavelength of 420 nm or less.

公开(公告)号：US20210230360A1

公开(公告)日：2021-07-29

申请号：US15734954

申请日：2019-08-09

Applicant: LG CHEM, LTD.

Inventor： Youngwook SON ,  Young In YANG ,  Ki Jae LEE ,  Mooho HONG ,  Byoungkue JEON ,  Young Young HWANG

IPC: C08G64/30 ,  C08G64/08

Abstract: Provided is a polycarbonate of Chemical Formula 1: wherein in Chemical Formula 1: Ar is C6-60 arylene unsubstituted or substituted with C1-10 alkyl; and n and m are each independently an integer from 1 to 50, provided that n+m is 2 or more and a preparation method thereof.

公开(公告)号：US20210269590A1

公开(公告)日：2021-09-02

申请号：US17276678

申请日：2020-07-29

Applicant: LG CHEM, LTD.

Inventor： Young Young HWANG ,  Youngwook SON ,  Daehyeon HWANG ,  Mooho HONG

IPC: C08G64/18 ,  C08L69/00 ,  C08G64/08

Abstract: Provided are a copolycarbonate- and a polycarbonate composition comprising the same. The copolycarbonate comprises repeat units of the following Chemical Formula 1 and repeat units of the following Chemical Formula 2:

公开(公告)号：US20200239691A1

公开(公告)日：2020-07-30

申请号：US16756090

申请日：2019-04-18

Applicant: LG CHEM, LTD.

Inventor： Byoungkue JEON ,  Youngwook SON ,  Daehyeon HWANG ,  Mooho HONG

IPC: C09B1/503 ,  C08G64/06 ,  C08K5/103 ,  C08K5/18 ,  C08K5/00 ,  G02B1/04

Abstract: Provided are a polycarbonate resin composition comprising a polycarbonate resin, pentaerythritol tetrastearate, a black dye, and a blue dye, and an optical molded product comprising same.

公开(公告)号：US20240368346A1

公开(公告)日：2024-11-07

申请号：US18576734

申请日：2023-05-11

Applicant: LG CHEM, LTD.

Inventor： Dayoung LEE ,  Youngwook SON ,  Hyong Min BAHN ,  Yeji YU

IPC: C08G64/12 ,  C08G64/30

Abstract: The present disclosure relates to a polycarbonate copolymer, and can provide a polycarbonate copolymer that includes a repeating unit having a specific structure, thereby being improved particularly in heat resistance.

公开(公告)号：US20240002595A1

公开(公告)日：2024-01-04

申请号：US18265516

申请日：2022-08-08

Applicant: LG CHEM, LTD. ,  YONSEI UNIVERSITY, UNIVERSITY - INDUSTRY FOUNDATION (UIF)

Inventor： Youngwook SON ,  Hyong Min BAHN ,  Byeong-Su KIM ,  Taehyung KIM ,  Yeji YU

IPC: C08G64/12 ,  C08G64/30

CPC classification number: C08G64/12 ,  C08G64/307

Abstract: Provided is a polycarbonate copolymer including a repeating unit of the following Chemical Formula 1, where the polycarbonate copolymer can have improved heat resistance:




wherein in Chemical Formula 1, R1, R2, n1 and n2 are as defined in the specification.

公开(公告)号：US20210253851A1

公开(公告)日：2021-08-19

申请号：US17261471

申请日：2019-08-09

Applicant: LG CHEM, LTD.

Inventor： Ki Jae LEE ,  Young In YANG ,  Youngwook SON ,  Mooho HONG ,  Byoungkue JEON ,  Young Young HWANG

IPC: C08L69/00 ,  C08G64/08 ,  C08G64/24

Abstract: The present disclosure relates to a polycarbonate and a preparation method thereof, which has a novel structure with an improvement in weather resistance and refractive index, while having excellent mechanical properties.

公开(公告)号：US20240018301A1

公开(公告)日：2024-01-18

申请号：US18039906

申请日：2022-06-08

Applicant: LG CHEM, LTD.

Inventor： Dayoung LEE ,  Youngwook SON ,  Hyong Min BAHN

IPC: C08G63/64 ,  C08G63/87

CPC classification number: C08G63/64 ,  C08G63/87

Abstract: Provided is a polycarbonate copolymer having improved surface hardness while maintaining impact strength. The polycarbonate copolymer including a specific ester repeating unit according to the present disclosure is characterized by having excellent surface hardness while maintaining intrinsic basic physical properties of polycarbonate.

公开(公告)号：US20230348714A1

公开(公告)日：2023-11-02

申请号：US18026320

申请日：2022-06-09

Applicant: LG CHEM, LTD.

Inventor： Youngwook SON ,  Dayoung LEE ,  Hyong Min BAHN

IPC: C08L69/00

CPC classification number: C08L69/00

Abstract: A polycarbonate compound composition and a method of preparing the same are provided. The polycarbonate compound composition comprises a polycarbonate including a repeating unit represented by Formula 1, and a polymer including a repeating unit represented by the following Formula 2, and has improved surface hardness while maintaining high impact strength.