A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of composite functional polycarboxylate superplasticizer
The invention discloses a preparation method of a composite functional polycarboxylate superplasticizer. Modified polyether isopentenol polyoxyethylene ether is used as a functional large monomer, methyl acyloxyethyl trimethyl ammonium chloride, 2-cyano-3-ethyoxyl ethyl acrylate, acrylic acid and maleic anhydride are used as functional small monomers, a hydrogen peroxide-ascorbic acid redox system is used as an initiator, thiohydracrylic acid is used as a chain transfer agent, and a chain extender is used as a chain extender. The composite functional polycarboxylate superplasticizer with both mud resistance and slump loss resistance is prepared through an aqueous solution free radical polymerization method. Compared with a commercially available common polycarboxylic acid water reducing agent, the water reducing agent not only can maintain excellent dispersing performance in the presence of clay, but also has good slump retaining performance.
本申请公开了一种复合功能型聚羧酸减水剂的制备方法；以改性聚醚异戊烯醇聚氧乙烯醚为功能大单体，甲基酰氧乙基三甲基氯化铵、2‑氰基‑3‑乙氧基丙烯酸乙酯、丙烯酸、顺丁烯二酸酐为功能小单体，以过氧化氢—抗坏血酸氧化还原体系为引发剂，以巯基丙酸为链转移剂，通过水溶液自由基聚合法制备一种兼具抗泥性能和保坍性能的复合功能型聚羧酸减水剂；该减水剂与市售普通聚羧酸减水剂相比，在黏土存在的情况下不仅能保持优良的分散性能且同时具有良好的保坍性能。
Preparation method of composite functional polycarboxylate superplasticizer
The invention discloses a preparation method of a composite functional polycarboxylate superplasticizer. Modified polyether isopentenol polyoxyethylene ether is used as a functional large monomer, methyl acyloxyethyl trimethyl ammonium chloride, 2-cyano-3-ethyoxyl ethyl acrylate, acrylic acid and maleic anhydride are used as functional small monomers, a hydrogen peroxide-ascorbic acid redox system is used as an initiator, thiohydracrylic acid is used as a chain transfer agent, and a chain extender is used as a chain extender. The composite functional polycarboxylate superplasticizer with both mud resistance and slump loss resistance is prepared through an aqueous solution free radical polymerization method. Compared with a commercially available common polycarboxylic acid water reducing agent, the water reducing agent not only can maintain excellent dispersing performance in the presence of clay, but also has good slump retaining performance.
本申请公开了一种复合功能型聚羧酸减水剂的制备方法；以改性聚醚异戊烯醇聚氧乙烯醚为功能大单体，甲基酰氧乙基三甲基氯化铵、2‑氰基‑3‑乙氧基丙烯酸乙酯、丙烯酸、顺丁烯二酸酐为功能小单体，以过氧化氢—抗坏血酸氧化还原体系为引发剂，以巯基丙酸为链转移剂，通过水溶液自由基聚合法制备一种兼具抗泥性能和保坍性能的复合功能型聚羧酸减水剂；该减水剂与市售普通聚羧酸减水剂相比，在黏土存在的情况下不仅能保持优良的分散性能且同时具有良好的保坍性能。
Preparation method of composite functional polycarboxylate superplasticizer
一种复合功能型聚羧酸减水剂的制备方法
WANG HAI (author) / MO XIANGYIN (author) / LIN JUN (author)
2023-06-30
Patent
Electronic Resource
Chinese
| European Patent Office | 2023
| European Patent Office | 2021