Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Crosslinking type polycarboxylic acid water reducing agent and preparation method thereof
The invention belongs to the technical field of preparation of concrete admixtures, and particularly relates to a cross-linked polycarboxylic acid water reducer and a preparation method thereof. The method comprises the following steps: (1) preparing hydroxyalkyl vinyl-terminated polyoxypropylene polyoxyethylene ether; (2) preparing trimethylolpropane polyoxyethylene polyoxypropylene ether triacrylate; and (3) carrying out free radical polymerization reaction on the hydroxyalkyl-terminated vinyl polyoxypropylene polyoxyethylene ether and trimethylolpropane polyoxyethylene polyoxypropylene ether triacrylate to prepare the cross-linking type polycarboxylic acid water reducing agent. In the polymerization process, the reaction rate is controllable, heat release is mild and stable, the phenomena of local implosion and the like caused by high temperature in the polymerization reaction process are avoided, the reaction speed can be stably controlled, and the polycarboxylic acid water reducer with high water reducing rate, high slump retention, good wrapping property and excellent workability is obtained under the condition of normal temperature. And moreover, the preparation method of the water reducing agent is suitable for most production lines.
本发明属于混凝土外加剂制备技术领域，具体涉及一种交联型聚羧酸减水剂及其制备方法。该方法包括(一)制备羟烷基端乙烯基聚氧丙烯聚氧乙烯醚；(二)制备三羟甲基丙烷聚氧乙烯聚氧丙烯醚三丙烯酸酯；(三)羟烷基端乙烯基聚氧丙烯聚氧乙烯醚与三羟甲基丙烷聚氧乙烯聚氧丙烯醚三丙烯酸酯自由基聚合反应制得交联型聚羧酸减水剂。该聚合过程反应速率可控，放热温和平稳，避免了聚合反应过程中由于高温导致的局部爆聚等现象，能平稳的控制反应速度，在常温条件下得到具有高减水率、高保塌、包裹性好和和易性优异的聚羧酸减水剂，将该减水剂用于混凝土中，不会对混凝土性能产生不利影响，且该减水剂的制备方法适合大多数生产线。
Crosslinking type polycarboxylic acid water reducing agent and preparation method thereof
The invention belongs to the technical field of preparation of concrete admixtures, and particularly relates to a cross-linked polycarboxylic acid water reducer and a preparation method thereof. The method comprises the following steps: (1) preparing hydroxyalkyl vinyl-terminated polyoxypropylene polyoxyethylene ether; (2) preparing trimethylolpropane polyoxyethylene polyoxypropylene ether triacrylate; and (3) carrying out free radical polymerization reaction on the hydroxyalkyl-terminated vinyl polyoxypropylene polyoxyethylene ether and trimethylolpropane polyoxyethylene polyoxypropylene ether triacrylate to prepare the cross-linking type polycarboxylic acid water reducing agent. In the polymerization process, the reaction rate is controllable, heat release is mild and stable, the phenomena of local implosion and the like caused by high temperature in the polymerization reaction process are avoided, the reaction speed can be stably controlled, and the polycarboxylic acid water reducer with high water reducing rate, high slump retention, good wrapping property and excellent workability is obtained under the condition of normal temperature. And moreover, the preparation method of the water reducing agent is suitable for most production lines.
本发明属于混凝土外加剂制备技术领域，具体涉及一种交联型聚羧酸减水剂及其制备方法。该方法包括(一)制备羟烷基端乙烯基聚氧丙烯聚氧乙烯醚；(二)制备三羟甲基丙烷聚氧乙烯聚氧丙烯醚三丙烯酸酯；(三)羟烷基端乙烯基聚氧丙烯聚氧乙烯醚与三羟甲基丙烷聚氧乙烯聚氧丙烯醚三丙烯酸酯自由基聚合反应制得交联型聚羧酸减水剂。该聚合过程反应速率可控，放热温和平稳，避免了聚合反应过程中由于高温导致的局部爆聚等现象，能平稳的控制反应速度，在常温条件下得到具有高减水率、高保塌、包裹性好和和易性优异的聚羧酸减水剂，将该减水剂用于混凝土中，不会对混凝土性能产生不利影响，且该减水剂的制备方法适合大多数生产线。
Crosslinking type polycarboxylic acid water reducing agent and preparation method thereof
一种交联型聚羧酸减水剂及其制备方法
HE XINYAO (Autor:in) / LI YAJIE (Autor:in) / FANG FUXIAN (Autor:in) / LI YUBO (Autor:in)
12.07.2022
Patent
Elektronische Ressource
Chinesisch
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