公开(公告)号：US20230020924A1

公开(公告)日：2023-01-19

申请号：US17783682

申请日：2021-11-25

Applicant: LG CHEM, LTD.

Inventor： Sung Won HONG ,  Hyung Sub LEE ,  Dae Woo LEE ,  Min Cheol JU ,  Seong Jae SHIN ,  Min Seung SHIN ,  In Soo KIM

IPC: C08F212/12 ,  C08F212/10 ,  C08F2/18 ,  C08F212/08 ,  C08F220/44

Abstract: The present invention relates to a method of preparing a polymer, which includes: adding a first reaction solution including an aqueous solvent and a monomer mixture including an alkyl-substituted aromatic vinyl-based monomer, an alkyl-unsubstituted aromatic vinyl-based monomer, and a vinyl cyanide-based monomer to a reactor and initiating polymerization; and performing polymerization by continuously adding an alkyl-substituted aromatic vinyl-based monomer to the reactor, wherein the first reaction solution satisfies Expression 1 (see the description of the invention).

公开(公告)号：US20210054124A1

公开(公告)日：2021-02-25

申请号：US16979841

申请日：2019-12-04

Applicant: LG CHEM, LTD.

Inventor： Min Cheol JU ,  Min Seung SHIN ,  Sung Won HONG ,  In Soo KIM ,  Hyung Sub LEE

IPC: C08F212/10 ,  C08F2/18 ,  C08L25/12 ,  C08L55/02

Abstract: The present invention relates to a method for preparing a thermoplastic copolymer using monomer droplets, a thermoplastic copolymer prepared therefrom and a thermoplastic resin composition including the same. In the preparation method, monomer droplets including an aromatic vinyl-based monomer are injected after reaching a polymerization conversion ratio of 10% to participate in the reaction after initiating polymerization, and a thermoplastic copolymer having an increased average particle diameter may be prepared in high yield.

公开(公告)号：US20190225788A1

公开(公告)日：2019-07-25

申请号：US16325156

申请日：2017-10-31

Applicant: LG CHEM,LTD.

Inventor： In Soo KIM ,  Hyung Sub LEE ,  Min Cheol JU ,  Min Seung SHIN ,  Sung Won HONG

IPC: C08L25/12 ,  C08F297/04 ,  C08J3/16 ,  C08L35/04

Abstract: The present invention relates to a method of preparing a thermoplastic resin. More particularly, the present invention relates to a method of preparing a thermoplastic resin, the method including A) a step of coagulating an emulsion-polymerized latex with an acid; B) a step of treating the coagulated aggregate (slurry) with a base, followed by dehydration; and C) a step of treating the dehydrated wet powder with an acid, followed by dehydration. A method of preparing a thermoplastic resin which exhibits reduced gas generation, color improvement, and superior thermal stability is provided.

公开(公告)号：US20170260384A1

公开(公告)日：2017-09-14

申请号：US14903485

申请日：2015-10-15

Applicant: LG CHEM, LTD.

Inventor： Jeong Su CHOI ,  Min Cheol JU ,  Min Seung SHIN ,  Sung Won HONG ,  In Soo KIM ,  Ho Hoon KIM ,  Sang Hoo PARK ,  Keun Hoon YOO ,  Roo Da LEE ,  Won Seok LEE ,  Hyung Sub LEE ,  Seok Goo JANG

IPC: C08L33/12 ,  C08L25/14

CPC classification number: C08L33/12 ,  C08F6/22 ,  C08F279/02 ,  C08F279/06 ,  C08L25/14 ,  C08L33/04 ,  C08L51/04 ,  C08F220/14 ,  C08F212/08 ,  C08F220/44

Abstract: Disclosed are a thermoplastic resin composition and a method of preparing the same. More particularly, the present invention relates to a thermoplastic resin composition including 10 to 90% by weight of a graft copolymer resin coagulated by an organic acid or an organic acid salt; and 90 to 10% by weight of a non-graft copolymer resin and having a moist-heat characteristic of 20 or less, wherein a refractive index difference between the graft copolymer resin and the non-graft copolymer resin is less than 0.01, a method of preparing the same, and a molded product comprising the same. According to the present disclosure, provided are a thermoplastic resin composition having superior overall property balance, color, and transparency, and being applicable to products that are exposed to high-temperature water or should be sterilized, due to excellent moist-heat resistance thereof, a method of preparing the same, and a molded product comprising the same.

公开(公告)号：US20170260300A1

公开(公告)日：2017-09-14

申请号：US15528487

申请日：2016-08-31

Applicant: LG CHEM, LTD.

Inventor： Sung Won HONG ,  Hyung Sub LEE ,  Min Cheol JU ,  Min Seung SHIN ,  In Soo KIM

IPC: C08C1/15 ,  C08K3/34 ,  C08L13/02

CPC classification number: C08C1/15 ,  C08F6/22 ,  C08F212/12 ,  C08K3/34 ,  C08L13/02 ,  C08L25/16 ,  C08L25/12 ,  C08F220/44 ,  C08L55/02

Abstract: The present invention relates to a thermoplastic resin. In accordance with the present invention, a thermoplastic resin exhibiting superior heat resistance, gloss, and whiteness while having mechanical properties identical to or higher than those of a conventional thermoplastic resin and a thermoplastic resin composition including the same are provided.

公开(公告)号：US20240150504A1

公开(公告)日：2024-05-09

申请号：US18280845

申请日：2023-01-17

Applicant: LG CHEM, LTD.

Inventor： Sung Won HONG ,  Hyung Sub LEE ,  Dae Woo LEE ,  Woo Ri KIM ,  Min Cheol JU ,  Min Seung SHIN ,  In Soo KIM

IPC: C08F212/10 ,  C08F2/18

CPC classification number: C08F212/10 ,  C08F2/18

Abstract: The present disclosure relates to a method of preparing a polymer, which includes: adding an alkyl-substituted aromatic vinyl-based monomer and a vinyl cyanide-based monomer to a reactor and initiating polymerization; and performing polymerization while continuously adding an alkyl-substituted aromatic vinyl-based monomer and a multifunctional initiator to the reactor, wherein the continuous addition of the alkyl-substituted aromatic vinyl-based monomer and the multifunctional initiator is initiated when a polymerization conversion rate is 10 to 30%, and the continuous addition of the alkyl-substituted aromatic vinyl-based monomer and the multifunctional initiator is terminated when a polymerization conversion rate is 70 to 80%.

公开(公告)号：US20230039916A1

公开(公告)日：2023-02-09

申请号：US17783184

申请日：2021-10-18

Applicant: LG CHEM, LTD.

Inventor： In Soo KIM ,  Hyung Sub LEE ,  Dae Woo LEE ,  Min Cheol JU ,  Min Seung SHIN ,  Sung Won HONG

IPC: C08F2/18 ,  C08F212/08 ,  C08F220/44 ,  C08F222/40

Abstract: Provided is a polymer production method including: batch-adding a reaction solution including a monomer mixture including a maleimide-based monomer, a vinyl aromatic monomer, and a vinyl cyanide-based monomer and an aqueous solvent to a reactor and initiating polymerization; and carrying out the polymerization while continuously adding the maleimide-based monomer and the aqueous solvent to the reactor, wherein the reaction solution satisfies the above Formula 1.

公开(公告)号：US20180155507A1

公开(公告)日：2018-06-07

申请号：US14900043

申请日：2015-08-31

Applicant: LG CHEM, LTD.

Inventor： Min Cheol JU ,  Min Seung SHIN ,  Won Seok LEE ,  Hyung Sub LEE ,  Seok Goo JANG ,  Jeong Su CHOI ,  Sung Won HONG ,  In Soo KIM ,  Ho Hoon KIM ,  Sang Hoo PARK ,  Keun Hoon YOO ,  Roo Da LEE

IPC: C08J3/16 ,  C08F279/02 ,  B01J19/18

CPC classification number: C08J3/16 ,  B01J19/1812 ,  C08C1/15 ,  C08F6/18 ,  C08F6/22 ,  C08F279/02 ,  C08F279/06 ,  C08J2309/10 ,  C08J2351/04 ,  C08L9/10 ,  C08L51/04 ,  C08F220/44

Abstract: Disclosed are a method of preparing a resin powder and an integrated reactor for the same. When a coagulation process is performed using an acidic coagulant in the integrated coagulator for latex coagulation and aging according to the present invention, a remaining acidic coagulant is also removed from a reactor through neutralization, and thus, a resin powder having enhanced moist-heat resistance and thermal stability may be prepared.

公开(公告)号：US20220204666A1

公开(公告)日：2022-06-30

申请号：US17606710

申请日：2020-10-27

Applicant: LG CHEM, LTD.

Inventor： Min Cheol JU ,  Min Seung SHIN ,  Sung Won HONG ,  In Soo KIM ,  Hyung Sub LEE

IPC: C08F212/12

Abstract: The present invention relates to a method for producing a copolymer, the method for producing a copolymer including: step (S10) for adding aromatic vinyl-based monomers substituted with alkyl groups and vinyl cyan-based monomers to perform polymerization in the presence of a polymerization initiator, wherein the vinyl cyan-based monomers are collectively added before initiation of the polymerization in step (S10), monomer droplets are continuously divisionally added during the polymerization in step (S10), and the monomer droplets contain part or all of the aromatic vinyl-based monomers substituted with alkyl groups, and relates to a copolymer produced therefrom, and a thermoplastic resin composition including the same.

公开(公告)号：US20210403621A1

公开(公告)日：2021-12-30

申请号：US16469546

申请日：2018-12-19

Applicant: LG CHEM, LTD.

Inventor： In Soo KIM ,  Min Cheol JU ,  Min Seung SHIN ,  Sung Won HONG ,  Hyung Sub LEE

IPC: C08F212/10

Abstract: Provided is a method of preparing a copolymer which includes 1) initiating polymerization by batch-adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor; and 2) performing polymerization by continuously adding an aromatic vinyl-based monomer to the reactor at a predetermined rate after the initiation of polymerization, wherein the continuous addition of the aromatic vinyl-based monomer is initiated when a polymerization conversion rate is 10% or less and terminated when a polymerization conversion rate is between 80 and 90%, and step 2) includes a first temperature phase and a second temperature phase, each of which maintains a constant temperature, wherein a temperature of the second temperature phase is higher than that of the first temperature phase, and thereby a copolymer with a small standard deviation for a vinyl cyan-based unit composition and excellent transparency may be prepared.