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Being applications of the water soluble polymer of the ester which consists of with the applications null acrylic Acid and
Being applications of the water soluble polymer of the ester which consists of with the applications null acrylic Acid and
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机译:作为酯的水溶性聚合物的应用,其由无效的丙烯酸和
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摘要
PROBLEM TO BE SOLVED: To provide a water-soluble polymer useful as an additive to a cementitious composition and its manufacturing method.;SOLUTION: The water-soluble polymer of an ester comprises acrylic acid, methacrylic acid and an alkylpolyalkylene glycol and is obtained by subjecting a mixture of acrylic acid (A), methacrylic acid (B) and the alkylpolyalkylene glycol (C) having a moleclar weight (Mw) of 350-4,000 to an azeotropic esterification in the presence of at least 85 mass%, based on the alkylpolyalkylene glycol (C), of an organic solvent forming an azeotropic mixture with water, subsequently free-radically polymeizing in an aqueous medium a mixture obtained during the esterification while removing the organic solvent during the polymerization by azeotropic distillation from the reaction mixture, and returning water removed by distillation to the mixture or feeding fresh water for replacement.;COPYRIGHT: (C)2003,JPO
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机译:解决的问题:提供一种用作水泥组合物的添加剂的水溶性聚合物及其制造方法。解决方案:酯的水溶性聚合物包含丙烯酸,甲基丙烯酸和烷基聚亚烷基二醇,并通过以下方法获得:使丙烯酸(A),甲基丙烯酸(B)和分子量(M w Sub>)为350-4,000的烷基聚亚烷基二醇(C)的混合物在50℃存在下进行共沸酯化。以烷基聚亚烷基二醇(C)为基准,至少85质量%的有机溶剂与水形成共沸混合物,随后在水性介质中自由基共聚合酯化过程中获得的混合物,同时通过共沸除去聚合过程中的有机溶剂从反应混合物中蒸馏,并通过蒸馏除去水回到混合物中或加入新鲜水进行置换。;版权所有:(C)2003,JPO
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