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    • 34. 发明授权
    • Compositions for on-site mannich polymer process
    • 用于现场甘露聚糖工艺的组合物
    • US4405728A
    • 1983-09-20
    • US339563
    • 1982-01-15
    • Richard F. KrebsPatrick J. MarekKenneth G. Phillips
    • Richard F. KrebsPatrick J. MarekKenneth G. Phillips
    • C08F8/28C08J3/03C08J3/06C08L33/26
    • C08J3/03C08F8/28C08J2333/24
    • The abstract of the disclosure is a method of rapidly preparing a dilute aqueous solution of poly N,N lower dialkylaminomethyl acrylamide and copolymers thereof having a molecular weight greater than 500,000 and a cationic charge of 1-90% which comprises:A. forming a water-in-oil emulsion of polyacrylamide or copolymers thereof, said water-in-oil emulsion containing in weight percentages:(1) 5 to 60% polymer;(2) 5 to 75% hydrophobic liquid;(3) 0.1 to 21% water-in-oil emulsifying agent;(4) 2 to 90% water;B. adding to the water-in-oil emulsion of step A a water soluble salt of a secondary amine having alkyl groups containing 1-3 carbon atoms in an amount, so as to provide 0.1-1.1 moles of secondary amine for each mole of amide functionality on said polymer;C. preparing a dry formaldehyde composition by mixing together:(1) paraformaldehyde;(2) dry alkalinity control agent(3) water-soluble high HLB surfactant capable of inverting the water-in-oil emulsion of step A;D. mixing together the water-in-oil emulsion containing the lower alkyl secondary amine salt with a quantity of the dry formaldehyde composition sufficient to provide from 0.1-1.1 mole of formaldehyde per mole of secondary amine and from 0.05-10% water-soluble surfactant based on the weight of water-in-oil emulsion used with a quantity of water, so as to obtain a 0.1-10% by weight aqueous solution of N,N-dialkylaminomethyl acrylamide.
    • 本公开的摘要是快速制备分子量大于500,000的聚N,N低级二烷基氨基甲基丙烯酰胺及其共聚物的稀水溶液的方法,阳离子电荷为1-90%,其包括:A.形成水 - 聚丙烯酰胺的油包水乳液或其共聚物,所述油包水乳液含有重量百分比:(1)5-60%的聚合物; (2)5至75%的疏水液体; (3)油包水乳化剂0.1〜21% (4)2〜90%的水; B.向步骤A的油包水乳液中加入一定量的具有1-3个碳原子的烷基的仲胺的水溶性盐,从而为每摩尔的 所述聚合物上的酰胺官能度; C.通过混合在一起制备干甲醛组合物:(1)多聚甲醛; (2)干燥碱性控制剂(3)能够翻转步骤A的油包水乳液的水溶性高HLB表面活性剂; D.将含有低级烷基仲胺盐的油包水乳液与一定量的干甲醛组合物混合在一起,足以提供每摩尔仲胺0.1-1.1摩尔甲醛和0.05-10%水溶性 基于与一定量的水一起使用的油包水乳液的重量的表面活性剂,以获得0.1-10重量%的N,N-二烷基氨基甲基丙烯酰胺的水溶液。