A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polyether slow-release slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention discloses a polyether slow-release slump-retaining polycarboxylate superplasticizer and a preparation method thereof, and belongs to the technical field of building materials and additives. The water reducing agent has slow release and slump retaining effects, and compared with a commercially available polycarboxylic acid water reducing agent, the water reducing agent has better water reducing, flowing, slump retaining and other properties. The concrete can be used for solving the technical problems of high sand content, poor quality and large slump loss caused by long-time transportation of concrete or long-time pumping in super high-rise building construction. Besides, the offset degree of electron clouds on C = C-double bonds in the unsaturated polyether structure (C = C-O-C-) used in the invention is greater than that of a vinyl alcohol structure, so that the stability of the C = C-double bonds is reduced, the C = C-double bonds are easier to break to generate a polymerization reaction, the reaction can be carried out under the conditions of no heating and short reaction time, the energy consumption is reduced, and the production cost is reduced. And the problems of long reaction time of the vinyl alcohol macromonomer and high energy consumption in the reaction process are solved.
本发明公开了一种聚醚缓释保坍型聚羧酸减水剂及制备方法，属于建筑材料和外加剂技术领域。该减水剂具有缓释保坍效果，与市售聚羧酸减水剂相比，减水、流动、保坍等性能更佳。可用于解决因沙石含量高、品质差和混凝土经长时间运输或超高层建筑施工中长时间泵送而导致的坍落度损失大的技术问题。此外，本发明使用的不饱和聚醚结构(C=C‑O‑C‑)中的C=C‑双键上电子云发生偏移程度大于乙烯醇结构，使得C=C‑双键稳定性降低，更容易断裂发生聚合反应，反应可在无需加热和短反应时间的条件下进行，降低能耗，弥补了乙烯醇类大单体反应时间长、反应过程能耗高的不足的问题。
Polyether slow-release slump-retaining polycarboxylate superplasticizer and preparation method thereof
The invention discloses a polyether slow-release slump-retaining polycarboxylate superplasticizer and a preparation method thereof, and belongs to the technical field of building materials and additives. The water reducing agent has slow release and slump retaining effects, and compared with a commercially available polycarboxylic acid water reducing agent, the water reducing agent has better water reducing, flowing, slump retaining and other properties. The concrete can be used for solving the technical problems of high sand content, poor quality and large slump loss caused by long-time transportation of concrete or long-time pumping in super high-rise building construction. Besides, the offset degree of electron clouds on C = C-double bonds in the unsaturated polyether structure (C = C-O-C-) used in the invention is greater than that of a vinyl alcohol structure, so that the stability of the C = C-double bonds is reduced, the C = C-double bonds are easier to break to generate a polymerization reaction, the reaction can be carried out under the conditions of no heating and short reaction time, the energy consumption is reduced, and the production cost is reduced. And the problems of long reaction time of the vinyl alcohol macromonomer and high energy consumption in the reaction process are solved.
本发明公开了一种聚醚缓释保坍型聚羧酸减水剂及制备方法，属于建筑材料和外加剂技术领域。该减水剂具有缓释保坍效果，与市售聚羧酸减水剂相比，减水、流动、保坍等性能更佳。可用于解决因沙石含量高、品质差和混凝土经长时间运输或超高层建筑施工中长时间泵送而导致的坍落度损失大的技术问题。此外，本发明使用的不饱和聚醚结构(C=C‑O‑C‑)中的C=C‑双键上电子云发生偏移程度大于乙烯醇结构，使得C=C‑双键稳定性降低，更容易断裂发生聚合反应，反应可在无需加热和短反应时间的条件下进行，降低能耗，弥补了乙烯醇类大单体反应时间长、反应过程能耗高的不足的问题。
Polyether slow-release slump-retaining polycarboxylate superplasticizer and preparation method thereof
一种聚醚缓释保坍型聚羧酸减水剂及制备方法
XIE GUIMING (author) / ZHOU JUN (author) / YANG RUI (author) / WANG ZHIYANG (author)
2022-06-03
Patent
Electronic Resource
Chinese
| European Patent Office | 2024
| European Patent Office | 2023
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2024
Slump-retaining polycarboxylate superplasticizer and preparation method thereof
| European Patent Office | 2023
Synthesis process of slow-release slump retaining agent polycarboxylate superplasticizer
| European Patent Office | 2022