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Ester polycarboxylic acid water reducer and preparation method thereof
The invention provides an ester polycarboxylic acid water reducer and a preparation method thereof, and relates to a concrete admixture technology. The ester polycarboxylic acid water reducing agent is prepared from the following components in parts by weight: 100 parts of methacrylic acid polyethylene glycol ester, 20 to 30 parts of unsaturated monomer, 0.7 to 2 parts of initiator, 0.1 to 0.4 part of reducing agent, 1 to 2 parts of chain transfer agent, 4 to 6 parts of sodium hydroxide and 180 to 200 parts of water. The water reducing agent has excellent water reducing performance and slump retaining performance, has good adaptability to different concrete raw materials, and can effectively solve the problems of poor cohesiveness, poor wrapping performance, slow flow velocity, segregation, bleeding and the like of concrete caused by material fluctuation and wide application of inferior materials. The preparation method adopts a one-step synthesis method, can effectively shorten the synthesis time, is simple in process, does not need harsh reaction conditions and equipment, saves the production cost, and can be used for large-scale production.
本发明提出了一种酯类聚羧酸减水剂及其制备方法，涉及混凝土外加剂技术。一种酯类聚羧酸减水剂，采用包括如下重量份数的各组分制备而成：甲基丙烯酸聚乙二醇酯100份、不饱和单体20～30份、引发剂0.7～2份、还原剂0.1～0.4份、链转移剂1～2份、氢氧化钠4～6份和水180～200份。该减水剂具有优异的减水性能和保坍性能，对不同混凝土原材料适应性较好，可有效解决因材料波动、劣质材料广泛应用导致混凝土粘聚性差、包裹性差、流速慢、离析以及泌水等问题。该制备方法采用一步合成法，可以有效缩短合成时间，且工艺简单，不需要严苛的反应条件及设备，节约生产成本，可用于大规模生产。
Ester polycarboxylic acid water reducer and preparation method thereof
The invention provides an ester polycarboxylic acid water reducer and a preparation method thereof, and relates to a concrete admixture technology. The ester polycarboxylic acid water reducing agent is prepared from the following components in parts by weight: 100 parts of methacrylic acid polyethylene glycol ester, 20 to 30 parts of unsaturated monomer, 0.7 to 2 parts of initiator, 0.1 to 0.4 part of reducing agent, 1 to 2 parts of chain transfer agent, 4 to 6 parts of sodium hydroxide and 180 to 200 parts of water. The water reducing agent has excellent water reducing performance and slump retaining performance, has good adaptability to different concrete raw materials, and can effectively solve the problems of poor cohesiveness, poor wrapping performance, slow flow velocity, segregation, bleeding and the like of concrete caused by material fluctuation and wide application of inferior materials. The preparation method adopts a one-step synthesis method, can effectively shorten the synthesis time, is simple in process, does not need harsh reaction conditions and equipment, saves the production cost, and can be used for large-scale production.
本发明提出了一种酯类聚羧酸减水剂及其制备方法，涉及混凝土外加剂技术。一种酯类聚羧酸减水剂，采用包括如下重量份数的各组分制备而成：甲基丙烯酸聚乙二醇酯100份、不饱和单体20～30份、引发剂0.7～2份、还原剂0.1～0.4份、链转移剂1～2份、氢氧化钠4～6份和水180～200份。该减水剂具有优异的减水性能和保坍性能，对不同混凝土原材料适应性较好，可有效解决因材料波动、劣质材料广泛应用导致混凝土粘聚性差、包裹性差、流速慢、离析以及泌水等问题。该制备方法采用一步合成法，可以有效缩短合成时间，且工艺简单，不需要严苛的反应条件及设备，节约生产成本，可用于大规模生产。
Ester polycarboxylic acid water reducer and preparation method thereof
一种酯类聚羧酸减水剂及其制备方法
BIAN YANWEI (author) / LI JUAN (author) / ZHAO JUN (author)
2023-04-11
Patent
Electronic Resource
Chinese
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