公开(公告)号：US20190085106A1

公开(公告)日：2019-03-21

申请号：US15528492

申请日：2016-09-08

Applicant: LG CHEM, LTD.

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

IPC: C08F212/12 ,  C08J3/07 ,  C08K3/34 ,  C08L25/16

CPC classification number: C08F212/12 ,  C08F6/22 ,  C08F2800/10 ,  C08J3/07 ,  C08K3/10 ,  C08K3/34 ,  C08K2003/162 ,  C08K2003/3045 ,  C08K2003/343 ,  C08L25/16 ,  C08L25/12 ,  C08F220/44 ,  C08F212/08 ,  C08L55/02

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 coagulation step of adding a water-soluble silicate compound and a metal salt coagulant to an α-methylstyrene-vinyl cyan compound copolymer latex, followed by coagulation. In accordance with the present invention, a method of preparing a thermoplastic resin having superior heat resistance by adding an additive during coagulation and aging of α-methylstyrene-vinyl cyan compound copolymer latex while controlling an addition time point of the additive is provided.

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.