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Slump-retaining water-reducing type polycarboxylic acid water reducing agent as well as preparation method and application thereof
The invention belongs to the field of additives, and relates to a slump-retaining water-reducing type polycarboxylic acid water reducing agent as well as a preparation method and application thereof. The preparation method of the slump-retaining water-reducing type polycarboxylic acid water reducer comprises the following steps: dissolving an unsaturated polyether macromonomer, an esterified monomer, an oxidant I and a reducing agent I in a solvent to obtain a substrate; the solution A, the solution B and the solution C are dropped into a substrate for free radical copolymerization, the solution A is a mixed solution of unsaturated carboxylic acid and unsaturated carboxylic ester, the solution B is an oxidant II solution, and the solution C is a mixed solution of a chain transfer agent and a reducing agent II. According to the invention, normal-temperature production can be realized, and the obtained polycarboxylate superplasticizer also has excellent slump retaining performance and water reducing performance, and has wide application prospects.
本发明属于外加剂领域，涉及一种保坍减水型聚羧酸减水剂及其制备方法和应用。所述保坍减水型聚羧酸减水剂的制备方法包括：将不饱和聚醚大单体、酯化单体、氧化剂Ⅰ和还原剂Ⅰ溶于溶剂中得到底物；将A溶液、B溶液和C溶液滴入底物中进行自由基共聚反应，A溶液为不饱和羧酸和不饱和羧酸酯的混合溶液，溶液B为氧化剂Ⅱ溶液，C溶液为链转移剂和还原剂Ⅱ的混合溶液。本发明不仅可以实现常温生产，并且所得聚羧酸减水剂还具有优异的保坍性能和减水性能，应用前景广阔。
Slump-retaining water-reducing type polycarboxylic acid water reducing agent as well as preparation method and application thereof
The invention belongs to the field of additives, and relates to a slump-retaining water-reducing type polycarboxylic acid water reducing agent as well as a preparation method and application thereof. The preparation method of the slump-retaining water-reducing type polycarboxylic acid water reducer comprises the following steps: dissolving an unsaturated polyether macromonomer, an esterified monomer, an oxidant I and a reducing agent I in a solvent to obtain a substrate; the solution A, the solution B and the solution C are dropped into a substrate for free radical copolymerization, the solution A is a mixed solution of unsaturated carboxylic acid and unsaturated carboxylic ester, the solution B is an oxidant II solution, and the solution C is a mixed solution of a chain transfer agent and a reducing agent II. According to the invention, normal-temperature production can be realized, and the obtained polycarboxylate superplasticizer also has excellent slump retaining performance and water reducing performance, and has wide application prospects.
本发明属于外加剂领域，涉及一种保坍减水型聚羧酸减水剂及其制备方法和应用。所述保坍减水型聚羧酸减水剂的制备方法包括：将不饱和聚醚大单体、酯化单体、氧化剂Ⅰ和还原剂Ⅰ溶于溶剂中得到底物；将A溶液、B溶液和C溶液滴入底物中进行自由基共聚反应，A溶液为不饱和羧酸和不饱和羧酸酯的混合溶液，溶液B为氧化剂Ⅱ溶液，C溶液为链转移剂和还原剂Ⅱ的混合溶液。本发明不仅可以实现常温生产，并且所得聚羧酸减水剂还具有优异的保坍性能和减水性能，应用前景广阔。
Slump-retaining water-reducing type polycarboxylic acid water reducing agent as well as preparation method and application thereof
一种保坍减水型聚羧酸减水剂及其制备方法和应用
LAI HUAZHEN (author) / WANG ZHAOPENG (author) / FANG YUNHUI (author) / CHEN HAO (author) / GUO YUANQIANG (author) / LI XIAOMING (author) / WANG YANGJIE (author) / CHEN XIAOBIN (author) / LIN TIANXING (author)
2024-06-21
Patent
Electronic Resource
Chinese
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