公开(公告)号：US20230144513A1

公开(公告)日：2023-05-11

申请号：US17919565

申请日：2021-11-18

Applicant: LG CHEM, LTD.

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

IPC: C08F212/10 ,  C08L25/12

CPC classification number: C08F212/10 ,  C08L25/12

Abstract: The present disclosure relates to a method for preparing a copolymer, a copolymer prepared therefrom, and a thermoplastic resin composition including the copolymer. The method includes introducing and polymerizing an aromatic vinyl-based monomer, a vinyl cyan-based monomer, and an imide-based monomer, wherein the imide-based monomer is introduced at once in an amount of 1 wt % to 24 wt % before the start of polymerization, and is continuously introduced in an amount of 76 wt % to 99 wt % from the start of the polymerization.

公开(公告)号：US20220275127A1

公开(公告)日：2022-09-01

申请号：US17624561

申请日：2020-11-25

Applicant: LG CHEM, LTD.

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

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

Abstract: Provided is a method of preparing a maleimide-based copolymer, which comprises adding a monomer mixture including an aromatic vinyl-based monomer and a maleimide-based monomer to an aqueous solution consisting of an aqueous solvent and a first vinyl cyanide-based monomer and performing polymerization.

公开(公告)号：US20220235158A1

公开(公告)日：2022-07-28

申请号：US17607295

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: C08F212/10

Abstract: The present invention relates to a method for producing a copolymer, a copolymer produced therefrom, and a thermoplastic resin composition including the same, the method including step (S10) for adding aromatic vinyl-based monomers and vinyl cyan-based monomers to perform polymerization in the presence of polymerization initiators, wherein the polymerization initiators includes at least two different kinds of polymerization initiators, and part or all of the aromatic vinyl-based monomers are continuously divisionally added during the polymerization in step (S10).

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.