公开(公告)号：US20210253790A1

公开(公告)日：2021-08-19

申请号：US16973692

申请日：2019-12-19

Applicant: LG CHEM, LTD.

Inventor： Kyung Min MIN ,  Sung Kyoung KIM ,  Seung Young PARK ,  Sang Cheol SHIN

IPC: C08G64/40 ,  B01J31/12 ,  C08G64/34 ,  B01D71/26 ,  B01D71/10 ,  B01D69/12

Abstract: The present disclosure relates to a method for separating an organic zinc catalyst dispersed in a polyalkylene carbonate resin solution by filtering the polyalkylene carbonate resin solution using a composite filtering membrane, which is a composite material comprising a hydroxyl group-containing material and polyolefin material and has a form in which one or both surfaces of the polyolefin material is coated with the hydroxyl group-containing material.

公开(公告)号：US20220348536A1

公开(公告)日：2022-11-03

申请号：US17628717

申请日：2021-07-09

Applicant: LG CHEM, LTD.

Inventor： Sang Cheol SHIN ,  Jun Seok KO ,  Yong Heon CHO ,  Joon Ho SHIN

IPC: C07C253/34 ,  C07C253/02

Abstract: Disclosed is a recovery method of a nitrile-based monomer including: supplying a feed stream including a nitrile-based monomer, a nitrogen compound, and water to a first distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; condensing the upper discharge stream of the first distillation tower and supplying the condensed stream to a decanter to separate the stream into a water layer and an organic layer; supplying an organic layer stream discharged from the decanter to a second distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; and splitting a part of the upper discharge stream from the second distillation tower and refluxing the split stream to the second distillation tower.

公开(公告)号：US20220143589A1

公开(公告)日：2022-05-12

申请号：US17437907

申请日：2020-09-28

Applicant: LG CHEM, LTD.

Inventor： Kyung Min MIN ,  Seung Young PARK ,  Sung Kyoung KIM ,  Sang Cheol SHIN ,  Won Seok KIM ,  Won Hee WOO

IPC: B01J31/12 ,  C08G64/40 ,  C08F6/02

Abstract: The present invention relates to a method for separating an organozinc catalyst from a polyalkylene carbonate polymerization solution, and the method of the present invention includes: stirring and aging a polymerization solution including a polyalkylene carbonate resin, an organozinc catalyst, an alkylene oxide and a polymerization solvent; and filtering the polymerization solution after completing the aging.

公开(公告)号：US20210246263A1

公开(公告)日：2021-08-12

申请号：US17054375

申请日：2019-12-20

Applicant: LG CHEM, LTD.

Inventor： Sung Kyoung KIM ,  Seung Young PARK ,  Sang Cheol SHIN ,  Kyung Min MIN

IPC: C08G64/34 ,  C07F3/06

Abstract: The present disclosure relates to a method of preparing an organic zinc catalyst through solid phase blending that does not require a solvent and a washing process, and a method of preparing a polyalkylene carbonate resin by using the organic zinc catalyst prepared thereby.

公开(公告)号：US20250083371A1

公开(公告)日：2025-03-13

申请号：US18280582

申请日：2023-02-16

Applicant: LG CHEM, LTD.

Inventor： Sang Ho LEE ,  Hyun Taek OH ,  Seong Beom HEO ,  Gyo Hee KIM ,  Seon Cheol CHA ,  Seo Hwa KIM ,  Yeong Min KIM ,  Sang Cheol SHIN

IPC: B29C48/00 ,  B29C48/78 ,  B29K55/02 ,  B29K75/00 ,  B29K105/26 ,  C08J11/24 ,  C08L55/02

Abstract: Provided is a method for preparing a recycled ABS resin, and the method for preparing a recycled ABS resin includes: preparing an extrusion feed including an acrylonitrile butadiene styrene (ABS) base resin including polyurethane, a metal carboxylic acid salt, and a polyhydric alcohol; and supplying the extrusion feed to an extruder to perform a depolymerization reaction of the polyurethane and extruding the extrusion feed.

公开(公告)号：US20220220300A1

公开(公告)日：2022-07-14

申请号：US17606863

申请日：2021-01-22

Applicant: LG CHEM, LTD.

Inventor： Won Hee WOO ,  Seung Young PARK ,  Sung Kyoung KIM ,  Sang Cheol SHIN ,  Kyung Min MIN ,  Won Seok KIM

IPC: C08L67/04 ,  C08L69/00

Abstract: The present disclosure provides a polyalkylene carbonate-based resin having excellent thermal stability, thereby having an improved heat shrinkage phenomenon, and a molded article produced using the same. The polyalkylene carbonate-based resin includes 100 parts by weight of a base resin including a polyalkylene carbonate resin and a polylactide resin, and 5 parts by weight to 10 parts by weight of a heat shrinkage prevention agent, wherein the base resin includes the polyalkylene carbonate resin and the polylactide resin in a weight ratio of 6:4 to 4:6, and the heat shrinkage prevention agent is one or more selected from the group consisting of a polyalkyl(meth)acrylate-based resin, a polyalphaolefin-vinyl acetate-based resin, and a polyoxyalkylene-based resin.