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    • 38. 发明授权
    • Method for producing methyl methacrylate polymer
    • 生产甲基丙烯酸甲酯聚合物的方法
    • US09133282B2
    • 2015-09-15
    • US13978267
    • 2011-12-27
    • Fuminobu Kitayama
    • Fuminobu Kitayama
    • C08F2/18C08F220/10C08F220/14
    • C08F2/18C08F220/10C08F220/14
    • Provided herein is a (meth)acrylic resin that has less impurities and is less likely to deteriorate in transparency or turn yellow during molding processing, which is not obtainable by conventional suspension polymerization. The invention is a method for producing a methyl methacrylate polymer, comprising suspension polymerization of 30 to 100 wt % of methyl methacrylate and 70 to 0 wt % of a monomer copolymerizable therewith to produce a methyl methacrylate polymer, wherein the polymerization is initiated in the presence of 350 ppm or less of a suspension stabilizer relative to the monomer(s) and then a suspension stabilizer is added when a polymerization conversion ratio reaches 20 to 90%.
    • 本文提供的是(在(例如)丙烯酸树脂中,杂质少,在模塑加工过程中透明度变差或变黄的可能性不大,这是常规悬浮聚合所不能得到的。 本发明是一种生产甲基丙烯酸甲酯聚合物的方法,其包括30至100重量%的甲基丙烯酸甲酯和70至0重量%的可与其共聚的单体的悬浮聚合产生甲基丙烯酸甲酯聚合物,其中聚合是在存在下引发的 相对于单体为350ppm以下的悬浮稳定剂,然后当聚合转化率达到20〜90%时添加悬浮稳定剂。