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    METHOD FOR PRODUCING COPOLYMER, COPOLYMER PRODUCED THEREFROM, AND THERMOPLASTIC RESIN COMPOSITION INCLUDING THE SAME
    2.
    发明申请
    METHOD FOR PRODUCING COPOLYMER, COPOLYMER PRODUCED THEREFROM, AND THERMOPLASTIC RESIN COMPOSITION INCLUDING THE SAME 有权

    公开(公告)号：US20220204666A1

    公开(公告)日：2022-06-30

    申请号：US17606710

    申请日：2020-10-27

    申请人： LG CHEM, LTD.

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

    IPC分类号： C08F212/12

    摘要： 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.

    METHOD OF PREPARING COPOLYMER
    3.
    发明申请
    METHOD OF PREPARING COPOLYMER 有权

    公开(公告)号：US20210403621A1

    公开(公告)日：2021-12-30

    申请号：US16469546

    申请日：2018-12-19

    申请人： LG CHEM, LTD.

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

    IPC分类号： C08F212/10

    摘要： 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.

    METHOD OF PREPARING POLYMER
    4.
    发明公开
    METHOD OF PREPARING POLYMER 审中-公开

    公开(公告)号：US20240150504A1

    公开(公告)日：2024-05-09

    申请号：US18280845

    申请日：2023-01-17

    申请人： LG CHEM, LTD.

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

    IPC分类号： C08F212/10 ,  C08F2/18

    CPC分类号： C08F212/10 ,  C08F2/18

    摘要： 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%.