公开(公告)号：US20210317243A1

公开(公告)日：2021-10-14

申请号：US17265118

申请日：2019-10-30

Applicant: LG CHEM, LTD.

Inventor： Jae Hyun PARK ,  Hyun Min LEE ,  Hyun Kyou HA ,  Kun Ji KIM ,  Kwang Jin LEE ,  Yang Jun JEON ,  Jin Hyuck JU

IPC: C08F114/06 ,  C08K3/26

Abstract: The present disclosure provides a method of preparing a vinyl chloride-based polymer, and the method provides excellent productivity while having reduced amount of a volatile organic compound generated so as to provide the vinyl chloride-based polymer suitable for an eco-friendly material, and improved foaming and viscosity properties of a plastisol including the prepared polymer, by adding a carbonate-based metal salt and a transition metal catalyst together, and controlling input time and amount of the transition metal catalyst.

公开(公告)号：US20180282447A1

公开(公告)日：2018-10-04

申请号：US15763726

申请日：2017-06-07

Applicant: LG CHEM, LTD.

Inventor： Jin Hyuck JU ,  Hyun Kyou HA ,  Joong Chul LIM ,  Yang Jun JEON ,  Min Jeong KANG

IPC: C08F114/06

Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer, and more specifically, to a method comprising the steps of, (S1) preparing a mixture in which a first protective colloid auxiliary agent and a chain regulator are mixed; (S2) preparing a second protective colloid auxiliary agent including the chain regulator activated by stirring the mixture prepared in step (S1); and (S3) performing polymerization by adding a vinyl chloride-based monomer and a polymerization initiator in the presence of the second protective colloid auxiliary agent prepared in step (S2).

公开(公告)号：US20180265608A1

公开(公告)日：2018-09-20

申请号：US15760158

申请日：2017-03-14

Applicant: LG CHEM, LTD.

Inventor： Joong Chul LIM ,  Hyun Kyou HA ,  Yang Jun JEON ,  Jin Hyuck JU ,  Min Jeong KANG

IPC: C08F14/06 ,  C08K5/13 ,  C08F2/18 ,  C08F2/44

CPC classification number: C08F14/06 ,  C08F2/18 ,  C08F2/44 ,  C08K5/13 ,  C08K5/138

Abstract: The present invention provides a method for preparing a vinyl chloride-based polymer comprising performing suspension polymerization of vinyl chloride-based monomer, wherein an aromatic hydrocarbon-based compound is added when a pressure change is 0.5 to 1.5 kg/cm2 with respect to an equilibrium pressure at a polymerization temperature in a polymerization reactor after the vinyl chloride-based monomer is added to the polymerization reactor, wherein the aromatic hydrocarbon-based compound comprises a reactive functional group having an intracarbon double bond and a hydroxyl group; and a vinyl chloride-based polymer prepared by the method and having a high polymerization degree and excellent fusion processability.

公开(公告)号：US20160017116A1

公开(公告)日：2016-01-21

申请号：US14774052

申请日：2014-09-30

Applicant: LG CHEM, LTD.

Inventor： Dong Kwon LEE ,  Kwang Hyon KIM ,  Bo Hee PARK ,  Se Woong LEE ,  Jin Hyuck JU

IPC: C08K5/053 ,  B01J19/24 ,  C08F114/06

CPC classification number: C08K5/053 ,  B01J19/24 ,  B01J2219/24 ,  C08F2/01 ,  C08F2/02 ,  C08F2/44 ,  C08F14/06 ,  C08F114/06 ,  C08K5/05 ,  C08L27/06

Abstract: Disclosed are a bulk PVC composition and a bulk PVC polymerization method using the same. According to the present invention, a bulk PVC composition that may effectively prevent generation of fine particles and scale (adhering to a reactor wall) during bulk polymerization and may be prepared without a post-treatment process of an antistatic agent added to easily isolate fine particles after bulk PVC polymerization, and a method and apparatus for polymerizing the same may be provided.

Abstract translation: 公开了使用该组合物的散装PVC组合物和本体PVC聚合方法。 根据本发明，可以在本体聚合期间可以有效地防止细小颗粒的产生和结垢（附着在反应器壁上）的块状PVC组合物，并且可以在没有加入抗静电剂的后处理工艺的情况下制备以容易地分离细颗粒 在聚氯乙烯聚合之后，可以提供其聚合方法和装置。

公开(公告)号：US20230149897A1

公开(公告)日：2023-05-18

申请号：US17916952

申请日：2022-01-14

Applicant: LG CHEM, LTD.

Inventor： Hyungki YOON ,  Young Jae HUR ,  Jin Hyuck JU ,  Taebin AHN ,  Dong Hoon PARK ,  Kwangin SHIN ,  Jae Soon KIM

IPC: B01J20/26 ,  C08F220/06 ,  C08J3/12 ,  C08J3/24 ,  B01J20/30

CPC classification number: B01J20/267 ,  B01J20/3021 ,  B01J20/3085 ,  C08F220/06 ,  C08J3/12 ,  C08J3/244 ,  C08J3/245 ,  C08F2810/20 ,  C08J2333/02

Abstract: The present disclosure relates to a method for preparing a super absorbent polymer. More specifically, it relates to a method for preparing a super absorbent polymer capable of preparing a super absorbent polymer in which the residual monomer content and the extractable content are simultaneously reduced by adding a reducing agent capable of a redox reaction with a thermal polymerization initiator before drying the hydrogel polymer.

公开(公告)号：US20170121438A1

公开(公告)日：2017-05-04

申请号：US15242192

申请日：2016-08-19

Applicant: LG CHEM, LTD.

Inventor： Jin Hyuck JU ,  Hyun Kyou HA ,  Joong Chul LIM ,  Yang Jun JEON ,  Min Jeong KANG

IPC: C08F214/06

CPC classification number: C08F214/06 ,  C08F222/40 ,  C08F259/04 ,  C08G73/12

Abstract: The present invention relates to a method for preparing a vinyl chloride copolymer having good heat resistance and a vinyl chloride copolymer produced by the same. In the preparation method, by not injecting an N-substituted maleimide based compound used as a comonomer together with a vinyl chloride monomer at one time in a pre-polymerization step, but in division in a specific ratio, a copolymer with a uniform distribution of the N-substituted maleimide based compound and the vinyl chloride monomer may be easily prepared, and the vinyl chloride copolymer may have good heat resistance. Accordingly, the preparation method of a vinyl chloride copolymer and the vinyl chloride copolymer according to the present invention may be easily applied to industries requiring the copolymer, particularly industries requiring a resin having good heat resistance as well as industries using a vinyl chloride resin.