Method for polymerizing a methyl methacrylate molding composition
    51.
    发明授权
    Method for polymerizing a methyl methacrylate molding composition 失效
    聚合甲基丙烯酸甲酯模塑组合物的方法

    公开(公告)号:US4833221A

    公开(公告)日:1989-05-23

    申请号:US92207

    申请日:1987-09-02

    申请人: Klaus Albrecht

    发明人: Klaus Albrecht

    CPC分类号: C08F220/14

    摘要: A two step method for making a thermoplastic molding composition predominantly comprising methyl methacrylate by polymerizing monomers in a first stage, in the presence or absence of a solvent, to 50 percent conversion, further polymerizing at 75.degree. C. to 150.degree. C. in a second stage in the presence of a nonpolymerizable organic solvent to a conversion of at least 80 percent, and then evaporating volatile constituents.

    摘要翻译: 一种制备热塑性模塑组合物的主要包含甲基丙烯酸甲酯的两步法,该方法主要是在第一阶段,在存在或不存在溶剂的情况下,将单体聚合至50%转化率,在75℃至150℃进一步聚合 在不可聚合的有机溶剂的存在下的第二阶段转化率至少为80%,然后蒸发挥发成分。