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    METHOD OF PREPARING GRAFT POLYMER
    1.
    发明申请
    METHOD OF PREPARING GRAFT POLYMER 有权

    公开(公告)号：US20220177629A1

    公开(公告)日：2022-06-09

    申请号：US17436520

    申请日：2020-09-07

    申请人： LG CHEM, LTD.

    发明人： Hyung Joon KIM ,  Geon Soo KIM ,  Moon Ja HWANG ,  Hee Jung JEON ,  Chang Hoe KIM ,  Min Su CHAE

    IPC分类号： C08F279/04

    摘要： Provided is a method of preparing a graft polymer, which includes: polymerizing a monomer mixture comprising a carboxylic acid monomer and methyl acrylate, wherein the carboxylic acid monomer is included at 1.5 to 2.5 wt %, and thus preparing an acrylic coagulant having an average particle diameter of 60 to 70 nm; polymerizing diene-based monomers in the presence of an emulsifier containing a salt of a compound and thus preparing a first diene-based rubber polymer; enlarging the first diene-based rubber polymer using the acrylic coagulant and thus preparing a second diene-based rubber polymer; and graft-polymerizing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer to the second diene-based rubber polymer and thus preparing a graft polymer.

    METHOD OF PREPARING GRAFT COPOLYMER AND METHOD OF PREPARING THERMOPLASTIC RESIN COMPOSITION INCLUDING THE SAME
    4.
    发明申请
    METHOD OF PREPARING GRAFT COPOLYMER AND METHOD OF PREPARING THERMOPLASTIC RESIN COMPOSITION INCLUDING THE SAME 有权

    公开(公告)号：US20220411559A1

    公开(公告)日：2022-12-29

    申请号：US17771679

    申请日：2021-07-22

    申请人： LG CHEM, LTD.

    发明人： Heejung JEON ,  Geon Soo KIM ,  Moon Ja HWANG ,  Hyung Joon KIM ,  Changhoe KIM ,  Minsu CHAE

    IPC分类号： C08F279/04 ,  C08F6/18 ,  C08F220/06 ,  C08F220/14 ,  C08F220/18

    摘要： Disclosed is a method of preparing a graft copolymer and a method of preparing a thermoplastic resin composition including the prepared graft copolymer. Also disclosed is a method of preparing a graft copolymer including a process of adding an aromatic vinyl monomer and a vinyl cyanide monomer to a conjugated diene rubber latex that is enlarged with a polymer particle diameter control agent that has a specific glass transition temperature and an average particle diameter in a specific ratio to an average particle diameter of a conjugated diene rubber latex, and graft-polymerizing the same; and a method of preparing a thermoplastic resin composition including the prepared graft copolymer.
    Also disclosed is a graft copolymer prepared using the conjugated diene rubber latex enlarged with the polymer particle diameter control agent exhibiting the synergistic effect of improving both impact strength and fluidity.