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公开(公告)号:US4067827A
公开(公告)日:1978-01-10
申请号:US743434
申请日:1976-11-19
申请人: Yoshinari Takano , Keiji Fujita , Yasuo Teraoka , Masahiro Nishida , Ryoichi Fujitani , Yaichi Kuratomo
发明人: Yoshinari Takano , Keiji Fujita , Yasuo Teraoka , Masahiro Nishida , Ryoichi Fujitani , Yaichi Kuratomo
CPC分类号: C08J9/20 , C08J9/0023 , C08J9/0061 , C08J2333/12
摘要: A process for improving the production of polymethyl methacrylate beads or copolymeric methyl methacrylate and vinyl beads wherein the monomer is polymerized in the presence of a foaming agent and foaming agent stabilizer and within an atmosphere of inert gas, such as nitrogen, at a pressure of at least 4 kg/cm.sup.2.G. The polymerizatin is pressurized after the reaction has proceeded to a conversion ratio of from 30 to 70%. The process essentially eliminates aggregation and "sticking together" of the beads produced thereby.
摘要翻译: 一种用于改进聚甲基丙烯酸甲酯珠或共聚甲基丙烯酸甲酯和乙烯珠的生产方法,其中单体在发泡剂和发泡剂稳定剂的存在下在惰性气体如氮气的气氛中在压力为 至少4公斤/厘米2。 在反应进行到30至70%的转化率之后,聚合物加压。 该方法基本上消除了由此产生的珠的聚集和“粘在一起”。