Method for producing flame resistant acrylic fibers
    4.
    发明授权
    Method for producing flame resistant acrylic fibers 失效
    生产阻燃丙烯酸纤维的方法

    公开(公告)号:US4101621A

    公开(公告)日:1978-07-18

    申请号:US688259

    申请日:1976-05-20

    CPC分类号: D01F6/40

    摘要: Flame resistant acrylic fibers are produced by, in a solution polymerization of a mixture consisting of 30-80% by weight of acrylonitrile, 20-70% by weight of vinyl chloride or vinylidene chloride and 0-15% by weight of the other unsaturated monomer in a solvent of dimethylformamide, adding a polymer (referred to as blendmer) consisting of acrylonitrile, vinyl chloride or vinylidene chloride and an anionic monomer and zinc salt of an aromatic sulfonic acid prior to starting of the polymerization, subjecting the resulting mixture to the solution polymerization, removing unreacted monomers from the formed polymer solution, adding sulfur dioxide and adding water to adjust water content, spinning the thus formed spinning solution into an aqueous solution of dimethylformamide.

    摘要翻译: 通过在由30-80重量%丙烯腈,20-70重量%氯乙烯或偏二氯乙烯和0-15重量%的其它不饱和单体组成的混合物的溶液聚合中,制备耐火丙烯酸纤维 在二甲基甲酰胺的溶剂中,在开始聚合之前加入由丙烯腈,氯乙烯或偏二氯乙烯组成的聚合物(称为混合器)和芳族磺酸的阴离子单体和锌盐,将所得混合物进行溶液 聚合,从形成的聚合物溶液中除去未反应的单体,加入二氧化硫并加水调节水分,将由此形成的纺丝溶液纺丝成二甲基甲酰胺水溶液。