公开(公告)号：US06448354B1

公开(公告)日：2002-09-10

申请号：US09696958

申请日：2000-10-27

申请人： Shin-ichi Hieda ,  Tadashi Kawabata ,  Shojiro Kuwabara ,  Masahiro Kurokawa

发明人： Shin-ichi Hieda ,  Tadashi Kawabata ,  Shojiro Kuwabara ,  Masahiro Kurokawa

IPC分类号： C08F2006

CPC分类号： C08F20/14 ,  C08F2/02

摘要： A methyl methacrylate syrup is produced by the steps of (1) preparing a starting material comprising methyl methacrylate or a monomer mixture mainly comprising methyl methacrylate, and dividing the starting material into 20 to 70% by weight of an initial charge and 30 to 80% by weight of an after-charge; (2) heating the initial charge in a reactor; (3) adding a whole protion of a chain transfer agent at the time when the initial charge reaches a reaction temperature; (4) adding the after-charge over 0.1 to 10 hours together with a polymerization initiator having a half-life of 10 to 300 seconds at the reaction temperature; (5) continuing the heating after the addition of the after-charge and the polymerization initiator is complete; and (6) adding a hindered phenol polymerization inhibitor at the time the heating is finished. The methyl methacrylate syrup thus produced is excellent in storage stability.

摘要翻译： 通过以下步骤制备甲基丙烯酸甲酯浆料：（1）制备包含甲基丙烯酸甲酯或主要包含甲基丙烯酸甲酯的单体混合物的原料，并将原料分成20至70重量％的初始电荷和30至80重量％ （重量）; （2）加热反应器中的初始装料; （3）在初始电荷达到反应温度时加入链转移剂的全部物质; （4）在反应温度下，将半衰期为10〜300秒的聚合引发剂与0.1〜10小时的后处理相加; （5）在加入后充电和聚合引发剂完成后继续加热; 和（6）在加热结束时加入受阻酚聚合抑制剂。 由此制备的甲基丙烯酸甲酯浆料的储存稳定性优异。