Process for the production of spinning solutions of polyacrylonitrile
    15.
    发明授权
    Process for the production of spinning solutions of polyacrylonitrile 失效
    生产聚丙烯腈纺丝溶液的方法

    公开(公告)号:US3044975A

    公开(公告)日:1962-07-17

    申请号:US69200957

    申请日:1957-10-23

    Applicant: BAYER AG

    CPC classification number: D01F6/18 C08F2/36 C08F20/44 D01F6/54

    Abstract: Spinning solutions of polyacrylonitrile or an interpolymer containing a preponderant proportion of acrylonitrile are made by polymerizing the acrylonitrile, optionally containing a minor proportion of an interpolymerizable monomeric material, in an organic solvent, e.g. carbon tetrachloride or 1,2-dichloroethane, which dissolves the monomer but not the polymer, adding after the polymerization is completed a solvent which dissolves the polymer and removing the organic solvent which dissolves the monomer but not the polymer. In the example acrylonitrile and methyl acrylate are interpolymerized in solution in carbon tetrachloride with azoisobutyronitrile as catalyst, dimethyl formamide is added to the reaction mixture and the carbon tetrachloride distilled off under reduced pressure.

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