公开(公告)号：US20210024667A1

公开(公告)日：2021-01-28

申请号：US17046038

申请日：2019-07-04

Applicant: LG Chem, Ltd.

Inventor： Yutaek Sung ,  Youn Sun Nam ,  Choong Hoon Lee ,  Young Hoon Na ,  Jeongyong Lee ,  Hyojoon Lee

IPC: C08F210/02 ,  C08F2/44

Abstract: Provided are an ethylene-vinyl acetate copolymer having a high degree of crosslinking by controlling a temperature difference in an autoclave reactor and an input ratio of an initiator during polymerization, even though a reduced amount of a crosslinking agent is used, and a preparation method thereof.

公开(公告)号：US20250059307A1

公开(公告)日：2025-02-20

申请号：US18726279

申请日：2023-03-07

Applicant: LG Chem, Ltd.

Inventor： Joongsoo Kim ,  Yutaek Sung ,  Ka Ram Sun ,  Jinyoung Lee ,  Hyojoon Lee ,  Yeonsoo Kim ,  So Dam Jeong ,  Min Hong Jeon

IPC: C08F210/16

Abstract: Provided is an ethylene/1-hexene copolymer satisfying the following conditions, having excellent long-term stability and processability as well as pipe resistance to internal pressure, and being useful for manufacturing high-pressure heating pipes, PE-RT pipes or large-diameter pipes, a molecular weight distribution (Mw/Mn) is 8 to 12, a broad orthogonal co-monomer distribution (BOCD) is 1 to 2, an integral value in the region where Log M is 6 or more in a gel permeation chromatography GPC curve graph having an x-axis of log M and a y-axis of dw/dlogM is 3.0% or more of the total integral value, and a tie molecule fraction is 6.0% or more.

公开(公告)号：US20210395411A1

公开(公告)日：2021-12-23

申请号：US17282524

申请日：2019-12-20

Applicant: LG Chem, Ltd.

Inventor： Jinyoung Lee ,  Sung Min Lee ,  Jeongkyu Lee ,  Hyojoon Lee ,  Seyoung Kim ,  Sung Ho Park ,  Seul Ki Im ,  Seok Hwan Kim ,  Daesik Hong

IPC: C08F210/16

Abstract: The present invention relates to polyolefin. More specifically, the present invention relates to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency, and such polyolefin has a density of 0.915 g/cm3 to 0.930 g/cm3 measured according to ASTM D1505; a nd has an ethylene sequence inhomogeneity(I) calculated by the following Equation 1 of 1.25 to 1.40, when analyzed by SSA(Successive Self-nucleation and Annealing): Inhomogeneity (I)=Lw/Ln   [Equation 1] in the Equation 1, Lw is weighted average(unit: nm) of ESL(Ethylene sequence length), and Ln is arithmetic m ean(unit: nm) of ESL(Ethylene sequence length).

公开(公告)号：US20200231789A1

公开(公告)日：2020-07-23

申请号：US16487715

申请日：2018-12-03

Applicant: LG Chem, Ltd.

Inventor： Sol Cho ,  Yi Young Choi ,  Chang Hwan Jang ,  Seyoung Kim ,  Sung Min Lee ,  Seul Ki Im ,  Jinyoung Lee ,  Hyojoon Lee

IPC: C08L23/08

Abstract: Provided is a polyethylene resin film exhibiting more improved transparency while exhibiting excellent processability and mechanical properties. The polyethylene resin film having a density of 0.910 g/cm3 to 0.930 g/cm3, and a haze of 10% or less at a thickness of 90 μm to 110 μm includes a first polyethylene resin and a second polyethylene resin at a weight ratio of 6:4 to 8:2, wherein the first polyethylene resin has an MFRR (21.6/2.16) value of 27 to 40, and the second polyethylene resin has an MFRR (21.6/2.16) value of 15 to 23, and the MFRR (21.6/2.16) value is obtained by dividing a melt flow rate (MFR21.6) measured at a temperature of 230° C. under a load of 21.6 kg in accordance with ISO 1133 by a melt flow rate (MFR2.16) measured at a temperature of 230° C. under a load of 2.16 kg in accordance with ISO 1133.

公开(公告)号：US20250154301A1

公开(公告)日：2025-05-15

申请号：US18838446

申请日：2023-10-16

Applicant: LG Chem, Ltd.

Inventor： Yutaek Sung ,  Joongsoo KIM ,  Hyojoon Lee

IPC: C08F210/02

Abstract: Provided is a polyethylene resin satisfying the following conditions 1) to 3), and being excellent in both mechanical properties and thermal resistance: 1) an inflection point exists in the range of −1.0≤log G*≤−0.5 in a modified VGP (Van Gurp Palmen) plot having an x-axis of log G* (G* is complex modulus, unit: dyne/cm2) and a y-axis of phase angle (unit: °); 2) Δ tan δ at 50 to 80° C. is less than 0.025 when measured by DMTA (Dynamic Mechanical Thermal Analysis); and 3) a melt index (MI2.16) measured at 190° C. under a load of 2.16 kg according to ASTM D1238 is 0.10 g/10 min or more.

公开(公告)号：US11118040B2

公开(公告)日：2021-09-14

申请号：US16487715

申请日：2018-12-03

Applicant: LG Chem, Ltd.

Inventor： Sol Cho ,  Yi Young Choi ,  Chang Hwan Jang ,  Seyoung Kim ,  Sung Min Lee ,  Seul Ki Im ,  Jinyoung Lee ,  Hyojoon Lee

IPC: C08L23/08 ,  C08L23/16

Abstract: Provided is a polyethylene resin film exhibiting more improved transparency while exhibiting excellent processability and mechanical properties. The polyethylene resin film having a density of 0.910 g/cm3 to 0.930 g/cm3, and a haze of 10% or less at a thickness of 90 μm to 110 μm includes a first polyethylene resin and a second polyethylene resin at a weight ratio of 6:4 to 8:2, wherein the first polyethylene resin has an MFRR (21.6/2.16) value of 27 to 40, and the second polyethylene resin has an MFRR (21.6/2.16) value of 15 to 23, and the MFRR (21.6/2.16) value is obtained by dividing a melt flow rate (MFR21.6) measured at a temperature of 230° C. under a load of 21.6 kg in accordance with ISO 1133 by a melt flow rate (MFR2.16) measured at a temperature of 230° C. under a load of 2.16 kg in accordance with ISO 1133.

公开(公告)号：US12221498B2

公开(公告)日：2025-02-11

申请号：US17282524

申请日：2019-12-20

Applicant: LG Chem, Ltd.

Inventor： Jinyoung Lee ,  Sung Min Lee ,  Jeongkyu Lee ,  Hyojoon Lee ,  Seyoung Kim ,  Sung Ho Park ,  Seul Ki Im ,  Seok Hwan Kim ,  Daesik Hong

IPC: C08F210/16 ,  C08F210/18

Abstract: The present invention relates to polyolefin. More specifically, the present invention relates to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency, and such polyolefin has a density of 0.915 g/cm3 to 0.930 g/cm3 measured according to ASTM D1505; and has an ethylene sequence inhomogeneity (I) calculated by the following Equation 1 of 1.25 to 1.40, when analyzed by SSA (Successive Self-nucleation and Annealing): Inhomogeneity (I)=Lw/Ln  [Equation 1] in the Equation 1, Lw is weighted average (unit: nm) of ESL (Ethylene sequence length), and Ln is arithmetic mean (unit: nm) of ESL (Ethylene sequence length).

公开(公告)号：US11987655B2

公开(公告)日：2024-05-21

申请号：US17278005

申请日：2019-12-20

Applicant: LG Chem, Ltd.

Inventor： Sung Min Lee ,  Jeongkyu Lee ,  Hyojoon Lee ,  Seyoung Kim ,  Sung Ho Park ,  Seul Ki Im ,  Jinyoung Lee ,  Chang Hwan Jang ,  Daesik Hong ,  Jisoo Song

IPC: C08F210/16

CPC classification number: C08F210/16 ,  C08F2500/10

Abstract: The present invention relates to polyolefin. More specifically, the present invention relate s to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency and satisfying one of the following 1)˜4):



1) when density is 0.9165 g/cm3 or more and less than 0.9175 g/cm3, the content of SCB (Short Chain Branch) is 9.5 to 10.5 wt %,
2) when density is 0.9175 g/cm3 or more and less than 0.9185 g/cm3, the content of SCB (Short Chain Branch) is 9.0 to 10.0 wt %,
3) when density is 0.9185 g/cm3 or more and less than 0.9195 g/cm3, the content of SCB (Short Chain Branch) is 8.5 to 9.5 wt %,
4) when density is 0.9195 g/cm3 or more and less than 0.9205 g/cm3, the content of SCB (Short Chain Branch) is 7.5 to 8.5 wt %,
wherein the density is measured according to ASTM D1505.

公开(公告)号：US10961333B2

公开(公告)日：2021-03-30

申请号：US16464469

申请日：2018-08-31

Applicant: LG Chem, Ltd.

Inventor： Yutaek Sung ,  Youn Sun Nam ,  Eun Jung Joo ,  Choong Hoon Lee ,  Dae Young Shin ,  Sungho Choi ,  Juho Yoon ,  Young Hoon Na ,  Hyojoon Lee

IPC: C08F210/02 ,  C08F218/08 ,  C08F10/02 ,  C08F2/01

Abstract: An ethylene vinyl acetate copolymer with a high degree of cross-linking and a method of preparing the same are provided, by controlling a temperature and polymerization heat in an autoclave reactor during polymerization, even when a reduced amount of a cross-linking agent is used.

公开(公告)号：US11584814B2

公开(公告)日：2023-02-21

申请号：US17046038

申请日：2019-07-04

Applicant: LG Chem, Ltd.

Inventor： Yutaek Sung ,  Youn Sun Nam ,  Choong Hoon Lee ,  Young Hoon Na ,  Jeongyong Lee ,  Hyojoon Lee

IPC: C08F210/02 ,  C08F210/08 ,  C08F2/44

Abstract: Provided are an ethylene-vinyl acetate copolymer having a high degree of crosslinking by controlling a temperature difference in an autoclave reactor and an input ratio of an initiator during polymerization, even though a reduced amount of a crosslinking agent is used, and a preparation method thereof.