Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Synthetic method of polycarboxylate-type water reducing agent with high water reducing rate and super slump loss resistance
The invention relates to a synthetic method of a polycarboxylate-type water reducing agent with high water reducing rate and super slump loss resistance. The method comprises the following steps: (1)weighing an initiator reducing component, a chain transfer agent and deionized water, and performing uniform mixing to prepare a solution A; (2) weighing an unsaturated acid monomer, a slump-retainingfunctional monomer and deionized water, and performing uniform mixing to prepare a solution B; (3) under a water bath condition, adding unsaturated polyether macromonomers and deionized water into the reaction container, and performing stirring and mixing; (4) adding an initiator oxidation component into the reaction container in the step (3), and dropwise adding the solution A and the solution Bat the same time to start polymerization reaction; and (5) after finishing dropwise adding, performing continuous stirring and preserving heat for a certain time, and performing cooling to room temperature to obtain a target water reducing agent. Compared with the prior art, the polycarboxylate-type water reducing agent synthesized by adopting the method has the advantages of the small mixing amount, the high water reducing rate, long slump retaining time, strong cement adaptability, simple and environment-friendly synthesis process and the like, and does not need to be compounded with a water reducing agent with high water reducing rate.
本发明涉及一种兼具高减水率和超保坍性的聚羧酸系减水剂的合成方法，包括以下步骤：(1)称取引发剂还原组分、链转移剂和去离子水混合均匀，配成A溶液；(2)称取不饱和酸类单体、保坍型功能单体和去离子水混合均匀，配成B溶液；(3)在水浴条件下，往反应容器中加入不饱和聚醚大单体和去离子水，搅拌混合；(4)往步骤(3)的反应容器中加入引发剂氧化组分，再接着同时滴加A溶液和B溶液开始聚合反应；(5)滴加完成后，持续搅拌并保温一定时间，冷却至常温后即可得到目的减水剂。与现有技术相比，本发明合成的聚羧酸系减水剂具有掺量少、减水率高、无需与高减水率减水剂复配、保坍时间长、与水泥适应性强、合成工艺简单环保等优点。
Synthetic method of polycarboxylate-type water reducing agent with high water reducing rate and super slump loss resistance
The invention relates to a synthetic method of a polycarboxylate-type water reducing agent with high water reducing rate and super slump loss resistance. The method comprises the following steps: (1)weighing an initiator reducing component, a chain transfer agent and deionized water, and performing uniform mixing to prepare a solution A; (2) weighing an unsaturated acid monomer, a slump-retainingfunctional monomer and deionized water, and performing uniform mixing to prepare a solution B; (3) under a water bath condition, adding unsaturated polyether macromonomers and deionized water into the reaction container, and performing stirring and mixing; (4) adding an initiator oxidation component into the reaction container in the step (3), and dropwise adding the solution A and the solution Bat the same time to start polymerization reaction; and (5) after finishing dropwise adding, performing continuous stirring and preserving heat for a certain time, and performing cooling to room temperature to obtain a target water reducing agent. Compared with the prior art, the polycarboxylate-type water reducing agent synthesized by adopting the method has the advantages of the small mixing amount, the high water reducing rate, long slump retaining time, strong cement adaptability, simple and environment-friendly synthesis process and the like, and does not need to be compounded with a water reducing agent with high water reducing rate.
本发明涉及一种兼具高减水率和超保坍性的聚羧酸系减水剂的合成方法，包括以下步骤：(1)称取引发剂还原组分、链转移剂和去离子水混合均匀，配成A溶液；(2)称取不饱和酸类单体、保坍型功能单体和去离子水混合均匀，配成B溶液；(3)在水浴条件下，往反应容器中加入不饱和聚醚大单体和去离子水，搅拌混合；(4)往步骤(3)的反应容器中加入引发剂氧化组分，再接着同时滴加A溶液和B溶液开始聚合反应；(5)滴加完成后，持续搅拌并保温一定时间，冷却至常温后即可得到目的减水剂。与现有技术相比，本发明合成的聚羧酸系减水剂具有掺量少、减水率高、无需与高减水率减水剂复配、保坍时间长、与水泥适应性强、合成工艺简单环保等优点。
Synthetic method of polycarboxylate-type water reducing agent with high water reducing rate and super slump loss resistance
一种兼具高减水率和超保坍性的聚羧酸系减水剂的合成方法
SUN ZHENPING (Autor:in) / GE HAOSHENG (Autor:in)
05.05.2020
Patent
Elektronische Ressource
Chinesisch
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