公开(公告)号：US11905354B2

公开(公告)日：2024-02-20

申请号：US17266078

申请日：2019-11-01

申请人： LG CHEM, LTD.

发明人： Jong Gil Kim ,  Chang Hun Kim ,  Jeong Hun Cho ,  Hyun Min Kim ,  Joon Hee Cho ,  Hyo Yong Kim

IPC分类号： C08F220/46 ,  C01B32/05 ,  D01F9/22

CPC分类号： C08F220/46 ,  C01B32/05 ,  D01F9/22 ,  C08F2800/10

摘要： Provided is a method of preparing an acrylonitrile-based copolymer for a carbon fiber, which comprises: preparing a reaction solution including a monomer mixture comprising a sulfonate-based monomer represented by Chemical Formula 1, a carboxylic acid-based monomer, and an acrylonitrile-based monomer and an organic solvent; and subjecting the reaction solution to polymerization, wherein the monomer mixture comprises the sulfonate-based monomer represented by Chemical Formula 1 at 0.55 to 1.6 mol %.

公开(公告)号：US11046792B2

公开(公告)日：2021-06-29

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.