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    METHOD FOR PRODUCING POLYACRYLONITRILE-BASED FIBER AND POLYACRYLONITRILE-BASED COPOLYMER USED THEREIN
    2.
    发明申请
    METHOD FOR PRODUCING POLYACRYLONITRILE-BASED FIBER AND POLYACRYLONITRILE-BASED COPOLYMER USED THEREIN 审中-公开

    公开(公告)号：US20200149196A1

    公开(公告)日：2020-05-14

    申请号：US16335076

    申请日：2017-11-22

    申请人： LG CHEM, LTD.

    发明人： Jeong Kyu LEE ,  Chang Hun KIM ,  In Young SONG ,  Jeong Hun CHO ,  Jong Soo DO ,  Sung Joon OH ,  Joon Hee CHO

    IPC分类号： D01F9/22 ,  C08F220/44 ,  C08F220/04 ,  C08F220/18

    摘要： The present invention relates to a method for producing a polyacrylonitrile-based fiber, wherein the method polymerizes a monomer mixture including an acrylonitrile-based monomer, a carboxylic acid-based comonomer, and an acrylate-based comonomer, wherein the acrylate-based comonomer includes the steps of producing a polyacrylonitrile-based copolymer so as to be included in an amount of 4 to 20 parts by weight based on 100 parts by weight of the monomer mixture, fiberizing the polyacrylonitrile-based copolymer, oxidizing and stabilizing the fiberized polyacrylonitrile-based copolymer, which may control the oxidation stabilization reaction, particularly the cyclization reaction. Accordingly, the energy consumption of the oxidation stabilization reaction may be reduced, economical efficiency of the production of polyacrylonitrile-based fiber may be obtained, and the physical and mechanical properties of the carbon fiber may be improved.

    METHOD OF PREPARING (METH)ACRYLONITRILE-BASED POLYMER FOR PREPARING CARBON FIBER
    3.
    发明申请
    METHOD OF PREPARING (METH)ACRYLONITRILE-BASED POLYMER FOR PREPARING CARBON FIBER 审中-公开

    公开(公告)号：US20190315889A1

    公开(公告)日：2019-10-17

    申请号：US16469030

    申请日：2018-09-14

    申请人： LG CHEM, LTD.

    发明人： Jeong Hun CHO ,  Young Soo SONG ,  Hyun Min KIM ,  Chang Hun KIM ,  Hyo Yong KIM ,  Joon Hee CHO

    IPC分类号： C08F2/01 ,  C08F2/06 ,  C08F20/44 ,  D01F9/22

    摘要： The present invention relates to a method of preparing a (meth)acrylonitrile-based polymer for preparing a carbon fiber, which comprises adding a reaction solution comprising a (meth)acrylonitrile-based monomer and a reaction solvent to a reactor to perform solution polymerization, performing solution polymerization under a condition in which a power consumption of the reactor is 1 to 5 kW/m3 when the reaction solution in the reactor has a viscosity of 0.1 poise or more and 250 poise or less, and performing solution polymerization under a condition in which a power consumption of the reactor is 8 to 13 kW/m3 when the reaction solution in the reactor has a viscosity of more than 250 poise and 450 poise or less.