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Preparation method of solid polycarboxylate superplasticizer
The invention discloses a preparation method of a solid polycarboxylate superplasticizer. The method comprises the following steps of: (1) adding unsaturated polyoxyethylene ether to a reaction device, and heating the unsaturated polyoxyethylene ether until the unsaturated polyoxyethylene ether is completely melted; (2) under the heat preservation condition of 50-70 DEG C, adding 1/3 of a first mixture to the material obtained in the step (1) for performing stirring evenly, adding a first initiator and 1/4 of a second initiator at a time, performing stirring for 2-3 minutes, and then dropwiseadding a second mixture into a reactor separately, wherein the dropwise adding time is 2-4 hours; after 1/4 of dropwise adding time, feeding 1/4 of the second initiator at a time; after 2/4 of dropwise adding time, feeding 1/4 of the second initiator at a time; after 3/4 of dropwise adding time, feeding 1/4 of remaining second initiator at a time; further reacting for 1-2 hours after dropwise adding is completed; and adding a neutralizer to adjust pH to be 6-7 after reacting is completed, pouring out a reaction product while the reaction product is hot, and cooling the reaction product to roomtemperature to obtain a solid polycarboxylate superplasticizer.
本发明公开了一种固体聚羧酸减水剂的制备方法，包括如下步骤：(1)将不饱和聚氧乙烯醚加入反应装置中，加热至完全熔化；(2)在50‑70℃的保温条件下，在步骤(1)所得的物料中加入1/3第一混合物搅拌均匀后，一次性加入第一引发剂及1/4第二引发剂，搅拌2‑3min，然后分别向反应釜里滴加第二混合物，滴加时间为2‑4h；当滴加1/4时间后，一次性投入1/4第二引发剂；当滴加2/4时间后，一次性投入1/4第二引发剂；当滴加3/4时间后，一次性投入剩余的1/4第二引发剂；滴加完毕后继续反应1‑2h；反应完成后，加入中和剂调节pH至6‑7，趁热将反应产物倒出，冷却至室温，即得所述固体聚羧酸减水剂。
Preparation method of solid polycarboxylate superplasticizer
The invention discloses a preparation method of a solid polycarboxylate superplasticizer. The method comprises the following steps of: (1) adding unsaturated polyoxyethylene ether to a reaction device, and heating the unsaturated polyoxyethylene ether until the unsaturated polyoxyethylene ether is completely melted; (2) under the heat preservation condition of 50-70 DEG C, adding 1/3 of a first mixture to the material obtained in the step (1) for performing stirring evenly, adding a first initiator and 1/4 of a second initiator at a time, performing stirring for 2-3 minutes, and then dropwiseadding a second mixture into a reactor separately, wherein the dropwise adding time is 2-4 hours; after 1/4 of dropwise adding time, feeding 1/4 of the second initiator at a time; after 2/4 of dropwise adding time, feeding 1/4 of the second initiator at a time; after 3/4 of dropwise adding time, feeding 1/4 of remaining second initiator at a time; further reacting for 1-2 hours after dropwise adding is completed; and adding a neutralizer to adjust pH to be 6-7 after reacting is completed, pouring out a reaction product while the reaction product is hot, and cooling the reaction product to roomtemperature to obtain a solid polycarboxylate superplasticizer.
本发明公开了一种固体聚羧酸减水剂的制备方法，包括如下步骤：(1)将不饱和聚氧乙烯醚加入反应装置中，加热至完全熔化；(2)在50‑70℃的保温条件下，在步骤(1)所得的物料中加入1/3第一混合物搅拌均匀后，一次性加入第一引发剂及1/4第二引发剂，搅拌2‑3min，然后分别向反应釜里滴加第二混合物，滴加时间为2‑4h；当滴加1/4时间后，一次性投入1/4第二引发剂；当滴加2/4时间后，一次性投入1/4第二引发剂；当滴加3/4时间后，一次性投入剩余的1/4第二引发剂；滴加完毕后继续反应1‑2h；反应完成后，加入中和剂调节pH至6‑7，趁热将反应产物倒出，冷却至室温，即得所述固体聚羧酸减水剂。
Preparation method of solid polycarboxylate superplasticizer
一种固体聚羧酸减水剂的制备方法
YU YANHUA (author) / LI FANG (author) / YANG XIUFANG (author) / HUANG YONGYI (author) / CHEN XIAMIN (author)
2020-11-24
Patent
Electronic Resource
Chinese
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