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：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：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：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：US20210002425A1

公开(公告)日：2021-01-07

申请号：US16976706

申请日：2019-05-03

Applicant: LG CHEM, LTD.

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

IPC: C08G69/28 ,  B32B27/08 ,  B32B27/34

Abstract: The present disclosure relates to a polyamide block copolymer and a polyamide film including the same. The polyamide block copolymer according to the present disclosure makes it possible to provide a polyamide film exhibiting excellent mechanical properties while being colorless and transparent.

公开(公告)号：US20190263095A1

公开(公告)日：2019-08-29

申请号：US16320356

申请日：2017-11-14

Applicant: LG CHEM, LTD.

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

IPC: B32B27/08 ,  B32B27/28 ,  B32B27/34 ,  C08L77/00 ,  C08L79/08 ,  C08K5/5415

Abstract: The plastic laminated film has both excellent mechanical properties and UV weathering resistance while being colorless and transparent, and can be suitably used as cover films for various flexible or foldable devices.

公开(公告)号：US20190153161A1

公开(公告)日：2019-05-23

申请号：US16320623

申请日：2017-11-29

Applicant: LG CHEM, LTD.

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

IPC: C08G73/14 ,  C08J5/18

Abstract: A polyamideimide copolymer which is an imide of a polyamic acid resulting from copolymerizing an aromatic diamine monomer, an aromatic dianhydride monomer, and an aromatic dicarbonyl monomer and a colorless and transparent polyamideimide film including the polyamideimide copolymer. The polyamideimide copolymer according to the present disclosure makes it possible to provide a polyamideimide film exhibiting excellent scratch resistance while being colorless and transparent.