| 摘要 |
PURPOSE:To obtain the titled polymer useful as flocculant for use in municipal sewage treatment, by reaction of an amino alkylated polymer with an alkylating agent at specific pH value to effect high degree of quaternization. CONSTITUTION:Normally 3-20wt% aqueous solution of an acrylamide polymer is made to react with, (A) pref. 0.1-1 molar time, based on the amide group in said polymer,of HCHO and (B) pref. 0.1-1.1 molar times, based on the above amide group, of a dialkylamine (e.g., dimetylamine) to prepare an amino alkylated polymer. The resulting polymer is made to react with (C) normally 0.5-1.5 molar times, based on the aminoalkyl group in the above polymer, of an alkylating agent (e.g., an ethyl chloride, diethyl sulfate) at a pH 3-7, pref. at 20-45 deg.C for 15-120min, thus obtaining the objective quaternized cationic polymer.
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