Liquid phase and aqueous solutions of poly(vinyl methyl ether) from
highly purified vinyl methyl ether monomer
    2.
    发明授权
    Liquid phase and aqueous solutions of poly(vinyl methyl ether) from highly purified vinyl methyl ether monomer 失效
    来自高纯度乙烯基甲基醚单体的聚(乙烯基甲基醚)的液相和水溶液

    公开(公告)号:US5393856A

    公开(公告)日:1995-02-28

    申请号:US105889

    申请日:1993-08-11

    CPC分类号: C07C41/42 C07C41/36 C08F16/18

    摘要: A process is disclosed for the preparation of liquid and aqueous solutions of amorphous colorless poly (vinyl methyl ether) polymer with low level of impurities from purified vinyl methyl ether. The polymer has relatively high molecular weight, narrow molecular weight distribution and does not degrade readily due to the presence of impurities. The purification of the monomer uses a procedure selected from the group consisting of a vapor-liquid separation, a solid-liquid separation and combinations thereof to remove the impurities at a temperature within the range of from -20.degree. C. to +30.degree. C. The aqueous solution is prepared by devolitilization of solvent solutions of the polymerized purified vinyl methyl ether monomer. The solid polymer is prepared by heating the aqueous solution of the poly(vinyl methyl ether). The amorphous polymers of poly(vinyl methyl ether) are particularly suited for adhesive applications.

    摘要翻译: 公开了一种用于从纯化的乙烯基甲基醚制备具有低水平杂质的无定形无色聚(乙烯基甲基醚)聚合物的液体和水溶液的方法。 该聚合物具有相对高的分子量,窄的分子量分布,并且由于杂质的存在而不会容易地降解。 单体的纯化使用选自气液分离,固液分离及其组合的方法,以在-20℃至+ 30℃的温度下除去杂质 该水溶液是通过将聚合的纯化的乙烯基甲基醚单体的溶剂溶液脱挥发制备的。 通过加热聚(乙烯基甲基醚)的水溶液制备固体聚合物。 聚(乙烯基甲基醚)的无定形聚合物特别适用于粘合剂应用。