Process for polymerizing vinyl chloride monomer
    3.
    发明授权
    Process for polymerizing vinyl chloride monomer 失效
    聚合氯乙烯单体的方法

    公开(公告)号:US4113932A

    公开(公告)日:1978-09-12

    申请号:US874748

    申请日:1978-02-03

    CPC分类号: C08F14/06

    摘要: In a process for polymerizing vinyl chloride monomer by the polymerization of vinyl chloride alone or a mixture of vinyl chloride as a main component and a monomer copolymerizable therewith in an aqueous medium, an improvement which comprises carrying out said polymerization in the presence of a polycyclic nitrogen-containing compound of the formula, ##STR1## wherein m and n are each an integer of 1 to 3, the amount of said compound being 1 ppm to less than 100 ppm by weight based on said monomer or monomer mixture. By this process, it is possible to substantially prevent the formation of scale attached to the polymerization vessel and the like without damaging the physical properties of the produced vinyl chloride polymer.