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51.
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
IPC分类号: C08F6/00 , C08F2/00 , C08F2/06 , C08F4/36 , C08F6/06 , C08F20/02 , C08F212/00 , C08F212/08 , C08F220/10 , C08F220/12 , C08F220/14 , C08F222/06
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。