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    • 2. 发明授权
    • Magnesium diacrylate, polyol monoacrylate grouting composition and
method for grouting joints and/or cracks in sewer conduits therewith
    • 二丙烯酸镁,多元醇单丙烯酸酯灌浆组合物和用于在下水道管道中灌浆接缝和/或裂缝的方法
    • US4318835A
    • 1982-03-09
    • US170474
    • 1980-07-21
    • William J. Clarke
    • William J. Clarke
    • C08F2/10C08F220/06E03F3/06F16L55/1645C08L33/02
    • E03F3/06C08F220/06F16L55/16455E03F2003/065
    • This invention is concerned with an aqueous liquid composition comprising unsaturated monomers including (1) magnesium diacrylate and/or calcium diacrylate, (2) a polyol monoacrylate selected from hydroxyethyl acrylate and hydroxypropyl acrylate, and (3) a polyethylenically unsaturated monomer copolymerizable with (1) and (2) to produce covalent cross-linking bonds in the copolymer besides the ionizable magnesium bonds. The weight ratio of (3) to the sum of (1) and (2) is in the range of about 3:97 to about 5:95. Examples of monomers that can be used as part or all of component (3) include N,N'-methylene-bis-acrylamide and ethylene glycol diacrylate. The relative proportions between the several monomers are selected to provide on polymerization a cross-linked vinyl addition polymer gel containing both covalent (non-ionic) cross-linking bonds and ionic cross-linking bonds and the relative proportions between the several components are predetermined to render the composition suitable for application by conventional mixing packer equipment hereinafter described. In such equipment, means is provided to direct a second aqueous solution or suspension containing a water-soluble free radical initiator, such as a persulfate or peroxide, separately but concurrently with the first monomer-containing solution to a common distributor head of the movable packer positioned in the sewer conduit adjacent the joint or crack to be repaired. The monomer solution is provided with a tertiary amine which serves as a reducing agent, thereby providing a redox polymerization system so that when the two liquids mix, upon discharge from the head, a rapid polymerization to a polymer gel occurs at the ambient temperature.
    • 本发明涉及包含(1)二丙烯酸镁和/或二丙烯酸钙的不饱和单体的水性液体组合物,(2)选自丙烯酸羟乙酯和丙烯酸羟丙酯的多元醇单丙烯酸酯,和(3)可与(1)共聚的多烯属不饱和单体 )和(2)除了可电离的镁键之外,在共聚物中产生共价交联键。 (3)与(1)和(2)之和的重量比在约3:97至约5:95的范围内。 可用作组分(3)的一部分或全部的单体的实例包括N,N'-亚甲基双丙烯酰胺和乙二醇二丙烯酸酯。 选择几种单体之间的相对比例以在聚合时提供含有共价(非离子)交联键和离子交联键的交联乙烯基加成聚合物凝胶,并且几种组分之间的相对比例预先确定为 使组合物适合于下文所述的常规混合包装设备的应用。 在这样的设备中,提供了将包含水溶性自由基引发剂(例如过硫酸盐或过氧化物)的第二水溶液或悬浮液与第一含单体溶液分开但同时地引导到可移动封隔器的公共分配器头的装置 定位在污水管道中,邻近关节或裂缝进行修复。 提供单体溶液具有用作还原剂的叔胺,从而提供氧化还原聚合体系,使得当两种液体在从头部排出时混合,在环境温度下发生聚合物凝胶的快速聚合。