公开(公告)号：US20210230449A1

公开(公告)日：2021-07-29

申请号：US15734971

申请日：2019-10-25

Applicant: LG CHEM, LTD.

Inventor： Jin Young PARK ,  Bi Oh RYU ,  Young Ji TAE ,  Youngseok PARK ,  Yongjoon HEO ,  Yeongrae CHANG

IPC: C09D177/06 ,  C09D179/08 ,  C08F293/00 ,  H01L51/00 ,  H01L51/52

Abstract: The present disclosure relates to a cover window for a flexible display device including a polymer substrate including a polyamide resin; and a hard coating layer formed on at least one surface of the polymer substrate, wherein a yellow index of the polymer substrate measured in accordance with STM E 313 is 4.00 or less, and an elastic modulus of the polymer substrate measured at a strain rate of 12.5 mm/min in accordance with ISO 527-3 is 4 to 9 GPa.

公开(公告)号：US20200369816A1

公开(公告)日：2020-11-26

申请号：US16636233

申请日：2018-12-07

Applicant: LG CHEM, LTD.

Inventor： Bi Oh RYU ,  Soonyong PARK ,  Youngseok PARK ,  Il Hwan CHOI ,  Young Ji TAE ,  Kwanyeol PAEK

IPC: C08F283/00 ,  C08J5/18

Abstract: The present invention relates to an aromatic poly(amide-imide) copolymer film having high retardation in the thickness direction and exhibiting a low moisture absorption rate, and a method for preparing the same.

公开(公告)号：US20200024401A1

公开(公告)日：2020-01-23

申请号：US16488064

申请日：2018-04-10

Applicant: LG CHEM, LTD.

Inventor： Bi Oh RYU ,  Soon Yong PARK ,  Young Ji TAE ,  Young Seok PARK ,  Kwan Yeol PAEK ,  Il Hwan CHOI

IPC: C08G73/14 ,  C08K5/3475 ,  C08J5/18

Abstract: A poly(amide-imide) copolymer composition comprising an imide of a polyamic acid and an ultraviolet stabilizer, and a colorless and transparent poly(amide-imide) film including the composition. The poly(amide-imide) copolymer composition according to the present disclosure makes it possible to provide a poly(amide-imide) film exhibiting excellent scratch resistance, UV shielding property, and UV weather resistance while being colorless and transparent. This film can be suitably used as a cover film of various flexible or foldable devices.

公开(公告)号：US20220073680A1

公开(公告)日：2022-03-10

申请号：US17418402

申请日：2020-11-30

Applicant: LG CHEM, LTD.

Inventor： Il Hwan CHOI ,  Jiae YEO ,  Soonyong PARK ,  Young Ji TAE

IPC: C08G69/32 ,  C08J5/18

Abstract: The present disclosure relates to a polymer resin composition including a polyamide resin in which an average particle size of individual crystals measured by a small-angle X-ray scattering apparatus is reduced through an alternating segment structure, and at least one selected from the group consisting of a metal salt compound and an end-capping agent compound, and a polymer film and a resin laminate using the same.

公开(公告)号：US20220033653A1

公开(公告)日：2022-02-03

申请号：US16972485

申请日：2019-11-01

Applicant: LG CHEM, LTD.

Inventor： Il Hwan CHOI ,  Soonyong PARK ,  Bi Oh RYU ,  Young Ji TAE ,  Youngseok PARK

IPC: C08L77/10 ,  C08J7/046 ,  C08G81/00

Abstract: The present invention relates to a polyamide resin in which an average particle size of individual crystals measured by a small-angle X-ray scattering apparatus is 8.0 nm or less, and a UV-cut slope (dT/dλ) measured for a specimen having a thickness of 45 μm or more and 55 μm or less according to ASTM E424 is 0.25 or more in the range of 10% to 80% transmittance, and a polymer film and resin laminate using the same. In addition, the present invention relates to a polyamide resin with characteristic profile in which a small-angle X-ray scattering function obtained by irradiating the polyamide resin with X-rays having an energy of 10 KeV to 20 KeV using a small-angle X-ray scattering apparatus satisfies Equation 1 and Equation 2, and a polymer film and resin laminate using the same.

公开(公告)号：US20210222007A1

公开(公告)日：2021-07-22

申请号：US17256055

申请日：2019-12-26

Applicant: LG CHEM, LTD.

Inventor： Il Hwan CHOI ,  Young Ji TAE ,  Soonyong PARK ,  Youngseok PARK ,  Bi Oh RYU

IPC: C08L77/10 ,  C08G69/26 ,  C08G69/42 ,  C08K5/3475 ,  C08J5/18

Abstract: The present invention relates to a polyamide resin film having improved UV shielding function by using a polyamide resin having a backbone chain of alternative structure of two types of polyamide segments; and a resin laminate using the polyamide resin film.

公开(公告)号：US20210189067A1

公开(公告)日：2021-06-24

申请号：US16079810

申请日：2018-01-31

Applicant: LG CHEM, LTD.

Inventor： Bi Oh RYU ,  Soon Yong PARK ,  Young Ji TAE ,  Young Seok PARK ,  Kwan Yeol PAEK

IPC: C08G73/14 ,  C08J5/18

Abstract: The present invention relates to a polyamideimide copolymer and a colorless and transparent polyamideimide copolymer film. The polyamideimide copolymer according to the present invention enables to provide a polyamideimide film having improved UV shielding function while exhibiting excellent scratch resistance and mechanical properties.

公开(公告)号：US20170313916A1

公开(公告)日：2017-11-02

申请号：US15521359

申请日：2015-12-08

Applicant: LG CHEM, LTD.

Inventor： Young Ji TAE ,  Young Seok PARK ,  Byeong In AHN

IPC: C09J151/00 ,  B32B27/28 ,  H05K1/03 ,  C09J9/00 ,  C09J11/08 ,  B32B7/12 ,  C09J7/00 ,  B32B15/08 ,  H05K1/09

CPC classification number: C09J151/003 ,  B32B7/12 ,  B32B15/08 ,  B32B27/281 ,  B32B2309/105 ,  B32B2457/08 ,  C08G59/4042 ,  C08G59/50 ,  C08G59/5073 ,  C09J7/00 ,  C09J7/10 ,  C09J9/00 ,  C09J11/08 ,  C09J151/006 ,  C09J163/00 ,  C09J2201/622 ,  C09J2203/326 ,  C09J2205/114 ,  C09J2425/00 ,  C09J2451/00 ,  C09J2463/00 ,  H05K1/0346 ,  H05K1/0353 ,  H05K1/0393 ,  H05K1/09 ,  H05K2201/015 ,  H05K2201/0154 ,  C08L63/00

Abstract: The present invention relates to an adhesive resin composition including a styrene-ethylene-butylene-styrene copolymer with a specific chemical structure, an epoxy resin, an acid anhydride compound, and a curing catalyst, an adhesive film obtained from the resin composition, and a flexible metal laminate including the adhesive film.

公开(公告)号：US20210230425A1

公开(公告)日：2021-07-29

申请号：US16972389

申请日：2019-12-26

Applicant: LG CHEM, LTD.

Inventor： Il Hwan CHOI ,  Soonyong PARK ,  Young Ji TAE ,  Youngseok PARK ,  Bi Oh RYU

IPC: C08L77/10 ,  C08K5/3475 ,  C08K5/3492 ,  B32B27/34 ,  B32B27/08

Abstract: The present invention relates to a polyamide resin film having improved light resistance by minimizing color difference variation rate due to long-term ultraviolet irradiation, and a resin laminate using the same.

公开(公告)号：US20210214497A1

公开(公告)日：2021-07-15

申请号：US17059975

申请日：2019-11-01

Applicant: LG CHEM, LTD.

Inventor： Il Hwan CHOI ,  Young Ji TAE ,  Soonyong PARK ,  Youngseok PARK

IPC: C08G69/32 ,  C08G69/28 ,  C08G69/42 ,  C08L77/10

Abstract: The present invention relates to a polyamide resin having a main chain having a structure in which two polyamide segments are linked in an alternating way, a preparation method thereof, and a polyamide film and resin laminate including the same.