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    • 14. 发明授权
    • Process for producing acrylamide polymers in an acetone-water solvent system
    • 在丙酮 - 水溶剂体系中制备丙烯酰胺聚合物的方法
    • US3919140A
    • 1975-11-11
    • US53686574
    • 1974-12-27
    • SUMITOMO CHEMICAL CO
    • HIRATA HIDEKAZUSAKAI SIRO
    • C02F1/54C08F20/56C08L1/10C08F120/52C08L51/00
    • C08F20/56C02F1/54
    • A process for producing acrylamide polymers involves polymerization of acrylamide or methacrylamide or polymerizable monovinylic monomers containing predominantly acrylamide or methacrylamide in a mixture of acetone and water in the presence of polyvinyl alcohol, the amount of acetone being from about 23 to 30 %, preferably up to 29.5 %, by weight based on the weight of the acetone-water mixture and the amount of polyvinyl alcohol being from 0.5 to 4 % by weight based on the weight of the polymerizable monomers. The water-soluble acrylamide polymers obtained by this process are in the form of a powder and possess high intrinsic viscosity or high molecular weight so that they are useful as flocculating agents.
    • 制备丙烯酰胺聚合物的方法包括在聚乙烯醇存在下,丙烯酰胺或甲基丙烯酰胺或主要含丙烯酰胺或甲基丙烯酰胺的丙烯酰胺或甲基丙烯酰胺的混合物中聚合,丙酮的量为约23至30%,优选至多 29.5重量%,基于丙酮 - 水混合物的重量,聚乙烯醇的量为可聚合单体重量的0.5-4重量%。 通过该方法获得的水溶性丙烯酰胺聚合物为粉末形式,具有高特性粘度或高分子量,因此它们可用作絮凝剂。