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    Hydroxyethyl hydroxypropyl methylcellulose as a protective colloid in vinyl chloride polymerization
    6.
    发明授权
    Hydroxyethyl hydroxypropyl methylcellulose as a protective colloid in vinyl chloride polymerization 失效
    羟乙基羟丙基甲基纤维素作为氯乙烯聚合中的保护胶体

    公开(公告)号：US3879365A

    公开(公告)日：1975-04-22

    申请号：US43127274

    申请日：1974-01-07

    申请人： DOW CHEMICAL CO

    发明人： GREMINGER JR GEORGE K ,  JOHNSON EARL H

    IPC分类号： C08F14/06 ,  C08F3/30 ,  C08F15/02 ,  C08F15/08

    CPC分类号： C08F14/06 ,  C08F2/20

    摘要： An improvement in the process for preparing polymers from vinyl chloride monomer in suspension comprising the use, as a protective colloid, in the suspension media, of hydroxyethyl hydroxypropyl methylcellulose having a thermal gel point greater than about 70*C, a hydroxyethoxyl substitution of about 10-22 weight percent, a hydroxypropyl substitution of about 14-32 weight percent, a methoxyl substitution of about 6-12.5 weight percent, and a total degree of substitution of greater than about 1.5.

    摘要翻译： 在悬浮液中由氯乙烯单体制备聚合物的方法的改进，其包括在悬浮介质中使用热凝胶点大于约70℃的羟乙基羟丙基甲基纤维素，羟乙氧基取代为约10 -22重量％，约14-32重量％的羟丙基取代，约6-12.5重量％的甲氧基取代和大于约1.5的总取代度。