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    METHOD OF PREPARING GRAFT POLYMER
    4.
    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
    5.
    发明申请
    METHOD OF PREPARING GRAFT COPOLYMER 有权

    公开(公告)号：US20220153899A1

    公开(公告)日：2022-05-19

    申请号：US17435637

    申请日：2020-07-21

    申请人： LG CHEM, LTD.

    发明人： Tae Young JEON ,  Joo Byung CHAI ,  Yu Sung JUNG ,  Jong Beom KIM ,  Eun Seon PARK

    IPC分类号： C08F279/04

    摘要： The present invention provides a method of preparing a graft copolymer, which comprises graft emulsion polymerization of a diene-based rubber polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer in the presence of an azo-based initiator having a solubility in water at 20° C. of 10 g/100 g or more and a 10-hour half-life decomposition temperature in water of 80° C. or less, wherein the graft emulsion polymerization is initiated at 45 to 55° C. According to the present invention, a method of preparing a graft copolymer, which allows polymerization to be performed at low temperatures and ensures excellent polymerization stability, can be provided.

    Method for preparing graft copolymer and graft copolymer prepared thereby
    6.
    发明授权
    Method for preparing graft copolymer and graft copolymer prepared thereby 有权

    公开(公告)号：US11332568B2

    公开(公告)日：2022-05-17

    申请号：US16621681

    申请日：2018-10-26

    申请人： LG CHEM, LTD.

    发明人： Jae Bum Seo ,  Dae Woo Lee ,  Jung Tae Park ,  Gyu Sun Kim ,  Ji Uk Jang

    IPC分类号： C08F279/04 ,  C08F2/02 ,  C08F2/04 ,  C08F255/06

    摘要： Provided are a method for preparing a graft copolymer and a graft copolymer prepared thereby, the method comprising: preparing a reaction solution comprising a copolymer comprising a unit derived from a diene-based monomer and a unit derived from an alkene-based monomer, an aromatic vinyl-based monomer, a vinyl cyan-based monomer, and a reaction solvent; and adding the reaction solution to perform primary bulk polymerization at 100 to 110° C., wherein the copolymer comprises the unit derived from a diene-based monomer in an amount of 5 to 10 wt %, and the graft copolymer has an average rubber particle size of 2 to 5μm.

    Thermoplastic resin composition, molded resin article thereof, and coated article
    7.
    发明授权
    Thermoplastic resin composition, molded resin article thereof, and coated article 有权

    公开(公告)号：US11299623B2

    公开(公告)日：2022-04-12

    申请号：US16624657

    申请日：2018-06-18

    申请人： Techno-UMG Co., Ltd.

    发明人： Shinji Yamashita ,  Hiroshi Sakai

    IPC分类号： C08L69/00 ,  C08F212/10 ,  C08F279/04 ,  C08L51/04

    摘要： The present invention provides a thermoplastic resin composition in which occurrence of an absorption phenomenon in a coating step can be suppressed and which is excellent in terms of impact resistance, heat resistance, and fluidity during a molding step; a coated article; and a molded resin article obtained by molding the thermoplastic resin composition. The thermoplastic resin composition contains: 35 to 75 parts by mass of an aromatic polycarbonate resin (A); 15 to 35 parts by mass of a rubber-containing graft copolymer (B) obtained by copolymerizing a monomer mixture comprising an aromatic vinyl compound and a vinyl cyanide compound in the presence of a rubbery polymer; and 10 to 50 parts by mass of a rigid copolymer mixture (C) containing a rigid copolymer (C-I) and a rigid copolymer (C-II), in which in the rigid copolymer mixture (C), an amount of the rigid copolymer (C-II) is 20% to 80% by mass in the mixture.

    METHOD OF PREPARING GRAFT COPOLYMER
    10.
    发明申请
    METHOD OF PREPARING GRAFT COPOLYMER 有权

    公开(公告)号：US20210163652A1

    公开(公告)日：2021-06-03

    申请号：US17047657

    申请日：2019-11-08

    申请人： LG CHEM, LTD.

    发明人： Ji Uk JANG ,  Dae Woo LEE ,  Jae Bum SEO ,  Jung Tae PARK ,  Gyu Sun KIM

    IPC分类号： C08F279/04 ,  C08F226/06 ,  C08F2/02 ,  C08L55/02

    摘要： Provided is a method of preparing a graft copolymer, which includes: preparing a liquid maleimide-based monomer; preparing a reaction solution including a diene-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer; and adding the liquid maleimide-based monomer and the reaction solution to a reactor and carrying out polymerization. According to the preparation method of the present invention, the amount of the maleimide-based monomer involved in the polymerization can be increased, and the color characteristics, glass transition temperature, and softening temperature of the graft copolymer are improved.