公开(公告)号：US11472949B2

公开(公告)日：2022-10-18

申请号：US16956149

申请日：2018-12-21

Applicant: LG Chem, Ltd.

Inventor： Joongsoo Kim ,  Hyuck Ju Kwon ,  Yi Young Choi ,  Ki Soo Lee ,  Jongsang Park ,  Daesik Hong ,  Ye Jin Lee ,  Jinyoung Kwak

IPC: C08L23/08 ,  C08F4/653 ,  C08F4/6592 ,  C08F210/16 ,  C08F4/646

Abstract: Provided is an ethylene/1-butene copolymer having excellent processability and stress cracking resistance. The ethylene/1-butene copolymer according to the present invention may be applied to a high-pressure resistant heating pipe, a PE-RT pipe, a large diameter pipe, etc.

公开(公告)号：US11072670B2

公开(公告)日：2021-07-27

申请号：US16765352

申请日：2018-11-28

Applicant: LG Chem, Ltd.

Inventor： Ye Jin Lee ,  Hye Kyung Lee ,  Eun Kyoung Song ,  Daesik Hong ,  Byung Seok Kim ,  Eunyoung Shin ,  Jinyoung Kwak

IPC: C08F110/02 ,  C08F210/16 ,  C08F210/14

Abstract: A catalyst composition and a method for preparing an olefin polymer by using the same are provided herein. In some embodiments, a catalyst composition includes a transition metal compound having a compound (A) represented by Chemical Formula 1 and a compound (B) represented by Chemical Formula 2 present in a molar ratio of 1.6:1 to 18. The catalyst composition has high activity in an olefin polymerization reaction and can contribute to a reduction of catalyst cost. The catalyst composition aides in high copolymerizability of olefin monomers, and the produced olefin polymers can exhibit excellent processability and long-term physical properties, suitable for a pipe.

公开(公告)号：US20210054120A1

公开(公告)日：2021-02-25

申请号：US17043194

申请日：2020-01-15

Applicant: LG Chem, Ltd.

Inventor： Ye Jin Lee ,  Eun Kyoung Song ,  Daesik Hong ,  Hye Kyung Lee ,  Joongsoo Kim ,  Eunyoung Shin ,  Jinyoung Kwak

IPC: C08F210/16 ,  C07F17/00

Abstract: A catalyst composition, a method from preparing an olefin polymer using the same, and an olefin polymer prepared from the same are disclosed herein. In some embodiments, a catalyst composition includes a first metallocene compound represented by the Chemical Formula 1, a second metallocene compound represented by the Chemical Formula 2, and a support. The catalyst composition can exhibit high activity in an olefin polymerization reaction and thus contribute to reducing catalyst costs, and can also exhibit high copolymerizability which can secure excellent processability and long-term physical properties, and thus, is suitable for providing polymers for pipes.

公开(公告)号：US20210032449A1

公开(公告)日：2021-02-04

申请号：US16635239

申请日：2018-12-06

Applicant: LG Chem, Ltd.

Inventor： Jongsang Park ,  Ki Soo Lee ,  Eun Kyoung Song ,  Daesik Hong ,  Ye Jin Lee ,  Joongsoo Kim ,  Eunyoung Shin ,  Youngsuk You ,  Jinyoung Kwak

IPC: C08L23/08 ,  C08F210/02 ,  C08F210/04 ,  C08F210/14 ,  C08F210/16 ,  C08F4/649 ,  C08F4/6592

Abstract: The present invention relates to a polyethylene copolymer which has excellent processability and long-term durability, and thus is useful for hollow molding of a pipe or the like.

公开(公告)号：US10894843B2

公开(公告)日：2021-01-19

申请号：US16478692

申请日：2018-11-29

Applicant: LG Chem, Ltd.

Inventor： Seul Ki Im ,  Seungmi Lee ,  Ohjoo Kwon ,  Eunji Shin ,  Ki Soo Lee ,  Daesik Hong ,  Sung Ho Park ,  Youngsuk You ,  Jinyoung Lee

IPC: C08F110/02 ,  C08F10/02 ,  C08F210/16 ,  C08F10/04 ,  C08F4/646 ,  C08F4/659 ,  C08F4/6592 ,  C08F10/14 ,  C08J5/18

Abstract: An olefin polymer capable of simultaneously satisfying excellent drop impact strength and transparency, a preparation method of the same, and a film using the same, can be provided. In an embodiment, an olefin polymer comprises a plurality of polymer chains, and satisfies the following conditions: i) each polymer chain of the plurality having an average number of short chain branches (SCBs) per 1000 carbon atoms of 20/1000C or more, wherein an SCB has C2 to C7 carbon atoms, ii) a molded film of the olefin polymer having a drop impact strength of 1500 g to 2400 g as measured in accordance with ASTM D1709A, wherein the molded film having a thickness of 100 μm, and iii) a molded film of the olefin polymer having a haze is 10% to 30% as measured in accordance with ASTM D1003, wherein the molded film having a thickness of 0.05 mm.