发明授权
- 专利标题： Process for producing high molecular weight acrylamide water-soluble polymers by controlling the viscosity of the polymerization reaction medium with a water-miscible organic solvent
- 专利标题（中）： 通过用水混溶性有机溶剂控制聚合反应介质的粘度来生产高分子量丙烯酰胺水溶性聚合物的方法
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申请号： US541623申请日： 1975-01-16
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公开(公告)号： US3969329A公开(公告)日： 1976-07-13
- 发明人: Eiichi Hirata , Shin-ichi Isaoka , Shiro Sakai
- 申请人： Eiichi Hirata , Shin-ichi Isaoka , Shiro Sakai
- 申请人地址： JA
- 专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人地址： JA
- 优先权： JA49-8069 19740116
- 主分类号： B01D21/01
- IPC分类号： B01D21/01 ; C02F1/54 ; C08F2/00 ; C08F2/10 ; C08F20/56 ; C08F28/00 ; C08F120/52 ; C08G75/00
摘要：
Water-soluble high molecular weight polymers, useful as coagulating agents, are prepared by initiating the polymerization of acrylamide or a monovinyl monomer mixture containing a predominant amount of acrylamide in an acetone-water mixture at a temperature of not lower than 5.degree.C but of lower than 25.degree.C in the presence of polyvinyl alcohol and a catalyst, the concentration of the monomer in the polymerization reaction mixture being 15 to 30 % by weight and the concentration of acetone in the acetone-water mixture being 15 to 35 % by weight, and continuing the polymerization reaction while controlling the viscosity of the reaction system by adding a water-miscible organic solvent having a small chain transfer coefficient to the reaction system with the progress of the polymerization reaction.
公开/授权文献
- US4989880A Tossing game apparatus 公开/授权日：1991-02-05