Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ether polycarboxylate superplasticizer as well as preparation method and application thereof
The invention relates to the technical field of water reducing agents, and particularly discloses an ether polycarboxylic acid water reducing agent as well as a preparation method and application thereof. The ether polycarboxylate superplasticizer is obtained by copolymerizing a macromonomer and a micromonomer aqueous solution, the macromonomer is methylallyl polyoxyethylene ether, and the micromonomer comprises acrylic acid and hydroxyethyl acrylate; wherein the weight ratio of the large monomer to the small monomer is 1:(3-5) and the weight ratio of acrylic acid to hydroxyethyl acrylate is 1:(1-3). The preparation method comprises the following steps: mixing a macromonomer with deionized water to obtain a mixed solution A; mixing a small monomer with deionized water to obtain a mixed solution B; dropwise adding the mixed solution B into the mixed solution A, and dropwise adding a chain transfer agent and an initiator at the same time to obtain a mixed solution C; and adding a sodiumhydroxide solution into the mixed solution C to neutralize until the pH value is 5-7. The product can be applied to concrete, wherein the ether polycarboxylate superplasticizer provided by the invention has good slump retaining performance, and can significantly reduce the slump of concrete.
本申请涉及减水剂技术领域，具体公开了一种醚类聚羧酸减水剂、其制备方法及应用。醚类聚羧酸减水剂由大单体和小单体水溶液共聚合获得，大单体为甲基烯丙基聚氧乙烯醚，小单体包括丙烯酸和丙烯酸羟乙酯；大单体与小单体的重量比为1：（3‑5）；丙烯酸与丙烯酸羟乙酯的重量比为1：（1‑3）。其制备方法为：将大单体和去离子水混合得到混合液A；将小单体和去离子水混合得到混合液B；向混合液A中滴加混合液B，同时滴加链转移剂和引发剂，得到混合液C；向混合液C中加入氢氧化钠溶液中和至PH=5‑7。其应用于混凝土中。本申请的醚类聚羧酸减水剂的保坍性能较好，可显著降低混凝土的坍落度。
Ether polycarboxylate superplasticizer as well as preparation method and application thereof
The invention relates to the technical field of water reducing agents, and particularly discloses an ether polycarboxylic acid water reducing agent as well as a preparation method and application thereof. The ether polycarboxylate superplasticizer is obtained by copolymerizing a macromonomer and a micromonomer aqueous solution, the macromonomer is methylallyl polyoxyethylene ether, and the micromonomer comprises acrylic acid and hydroxyethyl acrylate; wherein the weight ratio of the large monomer to the small monomer is 1:(3-5) and the weight ratio of acrylic acid to hydroxyethyl acrylate is 1:(1-3). The preparation method comprises the following steps: mixing a macromonomer with deionized water to obtain a mixed solution A; mixing a small monomer with deionized water to obtain a mixed solution B; dropwise adding the mixed solution B into the mixed solution A, and dropwise adding a chain transfer agent and an initiator at the same time to obtain a mixed solution C; and adding a sodiumhydroxide solution into the mixed solution C to neutralize until the pH value is 5-7. The product can be applied to concrete, wherein the ether polycarboxylate superplasticizer provided by the invention has good slump retaining performance, and can significantly reduce the slump of concrete.
本申请涉及减水剂技术领域，具体公开了一种醚类聚羧酸减水剂、其制备方法及应用。醚类聚羧酸减水剂由大单体和小单体水溶液共聚合获得，大单体为甲基烯丙基聚氧乙烯醚，小单体包括丙烯酸和丙烯酸羟乙酯；大单体与小单体的重量比为1：（3‑5）；丙烯酸与丙烯酸羟乙酯的重量比为1：（1‑3）。其制备方法为：将大单体和去离子水混合得到混合液A；将小单体和去离子水混合得到混合液B；向混合液A中滴加混合液B，同时滴加链转移剂和引发剂，得到混合液C；向混合液C中加入氢氧化钠溶液中和至PH=5‑7。其应用于混凝土中。本申请的醚类聚羧酸减水剂的保坍性能较好，可显著降低混凝土的坍落度。
Ether polycarboxylate superplasticizer as well as preparation method and application thereof
一种醚类聚羧酸减水剂、其制备方法及应用
DING ANWEI (Autor:in)
12.03.2021
Patent
Elektronische Ressource
Chinesisch
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