Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of powder polycarboxylate water reducer
The invention relates to the technical field of additives for mortar and concrete, in particular to a preparation method of a powder polycarboxylate water reducer. The preparation method comprises thefollowing steps: step 1, adding deionized water into a container, heating, stirring, dropwise adding a water solution formed by mixing methoxy polyethylene glycol ether methacrylate monoester, mercaptopropionic acid, methacrylic acid and deionized water, dropwise adding an initiator, carrying out heat preservation after dropwise adding, then cooling, and adjusting the pH value so as to obtain a polycarboxylate water reducer mother liquor; step 2, adding a defoaming agent into the polycarboxylate water reducer mother liquor, stirring; then adjusting the viscosity of the feed liquid, conveyingthe feed liquid into an atomizer of a drying chamber; adding a parting agent into an air inlet pipeline, wherein the air inlet temperature is controlled to be 180-220 DEG C, and the feed liquid temperature is controlled to be 20-40 DEG C; atomizing the feed liquid by pressure, contacting and mixing the atomized feed liquid with a hot drying medium, evaporating and drying the fog drops, and then separating the hot drying medium and the powder by using a cyclone separator to obtain the powder polycarboxylate water reducer with good moisture absorption resistance and dispersion performance.
本发明涉及砂浆和混凝土用外加剂技术领域，具体为一种粉体聚羧酸减水剂的制备方法。采用的技术方案是，包括以下步骤：步骤一，在容器中加入去离子水，加热后，搅拌并滴加甲氧基聚乙二醇醚甲基丙烯酸单酯、巯基丙酸、甲基丙烯酸、去离子水混合的水溶液，滴加引发剂，滴完后保温，然后降温，调节pH值，得到聚羧酸减水剂母液；步骤二，在聚羧酸减水剂母液中加入消泡剂搅拌，然后调节料液黏度，将料液输送到干燥室的雾化器中，在进风管道处加入隔离剂，控制进风温度为180～220℃、进料液温度为20～40℃，料液经压力雾化后与热干燥介质接触混合，将雾滴蒸发干燥，然后用旋风分离器将热干燥介质与粉体分离，得到抗吸湿性和分散性能较好的粉体聚羧酸减水剂。
Preparation method of powder polycarboxylate water reducer
The invention relates to the technical field of additives for mortar and concrete, in particular to a preparation method of a powder polycarboxylate water reducer. The preparation method comprises thefollowing steps: step 1, adding deionized water into a container, heating, stirring, dropwise adding a water solution formed by mixing methoxy polyethylene glycol ether methacrylate monoester, mercaptopropionic acid, methacrylic acid and deionized water, dropwise adding an initiator, carrying out heat preservation after dropwise adding, then cooling, and adjusting the pH value so as to obtain a polycarboxylate water reducer mother liquor; step 2, adding a defoaming agent into the polycarboxylate water reducer mother liquor, stirring; then adjusting the viscosity of the feed liquid, conveyingthe feed liquid into an atomizer of a drying chamber; adding a parting agent into an air inlet pipeline, wherein the air inlet temperature is controlled to be 180-220 DEG C, and the feed liquid temperature is controlled to be 20-40 DEG C; atomizing the feed liquid by pressure, contacting and mixing the atomized feed liquid with a hot drying medium, evaporating and drying the fog drops, and then separating the hot drying medium and the powder by using a cyclone separator to obtain the powder polycarboxylate water reducer with good moisture absorption resistance and dispersion performance.
本发明涉及砂浆和混凝土用外加剂技术领域，具体为一种粉体聚羧酸减水剂的制备方法。采用的技术方案是，包括以下步骤：步骤一，在容器中加入去离子水，加热后，搅拌并滴加甲氧基聚乙二醇醚甲基丙烯酸单酯、巯基丙酸、甲基丙烯酸、去离子水混合的水溶液，滴加引发剂，滴完后保温，然后降温，调节pH值，得到聚羧酸减水剂母液；步骤二，在聚羧酸减水剂母液中加入消泡剂搅拌，然后调节料液黏度，将料液输送到干燥室的雾化器中，在进风管道处加入隔离剂，控制进风温度为180～220℃、进料液温度为20～40℃，料液经压力雾化后与热干燥介质接触混合，将雾滴蒸发干燥，然后用旋风分离器将热干燥介质与粉体分离，得到抗吸湿性和分散性能较好的粉体聚羧酸减水剂。
Preparation method of powder polycarboxylate water reducer
一种粉体聚羧酸减水剂的制备方法
LUO ZHANG (Autor:in) / DU JUNJUN (Autor:in) / YIN LIXIAO (Autor:in)
18.09.2020
Patent
Elektronische Ressource
Chinesisch
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