A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shrinkage-reducing polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of building additives, in particular to a shrinkage-reducing polycarboxylate superplasticizer and a preparation method thereof. The shrinkage-reducing polycarboxylate superplasticizer comprises an esterification product, unsaturated polyoxyethylene ether, an emulsifier, an initiator solution, a chain transfer agent solution, an ester macromonomer, acrylic acid, a shrinkage-reducing functional monomer and an unsaturated sulfonate mixed solution. The preparation method comprises the following steps: preparing an esterification product; performing copolymerization reaction; and performing neutralization reaction. The esterification product is prepared by esterification of coconut diethanolamide and unsaturated acid and has the advantages of low cost and simplicity and convenience in operation, and the prepared esterification product and the shrinkage-reducing functional monomer are subjected to copolymerization reaction, so that a main chain of the polycarboxylate superplasticizer has hydrophilic groups such as amide and shrinkage-reducing groups; and the prepared polycarboxylate superplasticizer has low surface tension, effectively reduces the drying shrinkage of concrete, effectively improves the internal mechanical properties and strength of concrete, and has significant application value.
本发明涉及建筑外加剂技术领域，特别涉及一种减缩型聚羧酸减水剂及其制备方法。所述减水剂包括：酯化产物、不饱和聚氧乙烯醚、乳化剂、引发剂溶液、链转移剂溶液、酯类大单体、丙烯酸、减缩功能单体和不饱和磺酸盐混合溶液。其制备方法中包括酯化产物制备；共聚反应；中和反应；利用椰油酸二乙醇酰胺与不饱和酸进行酯化制备酯化产物，具有成本低廉、操作简便的优点，而且所制得的酯化产物与减缩功能单体共聚反应，使聚羧酸减水剂主链上带有酰胺等亲水基团和减缩基团，所制备的聚羧酸减水剂具有较低的表面张力，有效降低混凝土的干燥收缩，有效提高了混凝土内部的力学性能和强度，具有显著的应用价值。
Shrinkage-reducing polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of building additives, in particular to a shrinkage-reducing polycarboxylate superplasticizer and a preparation method thereof. The shrinkage-reducing polycarboxylate superplasticizer comprises an esterification product, unsaturated polyoxyethylene ether, an emulsifier, an initiator solution, a chain transfer agent solution, an ester macromonomer, acrylic acid, a shrinkage-reducing functional monomer and an unsaturated sulfonate mixed solution. The preparation method comprises the following steps: preparing an esterification product; performing copolymerization reaction; and performing neutralization reaction. The esterification product is prepared by esterification of coconut diethanolamide and unsaturated acid and has the advantages of low cost and simplicity and convenience in operation, and the prepared esterification product and the shrinkage-reducing functional monomer are subjected to copolymerization reaction, so that a main chain of the polycarboxylate superplasticizer has hydrophilic groups such as amide and shrinkage-reducing groups; and the prepared polycarboxylate superplasticizer has low surface tension, effectively reduces the drying shrinkage of concrete, effectively improves the internal mechanical properties and strength of concrete, and has significant application value.
本发明涉及建筑外加剂技术领域，特别涉及一种减缩型聚羧酸减水剂及其制备方法。所述减水剂包括：酯化产物、不饱和聚氧乙烯醚、乳化剂、引发剂溶液、链转移剂溶液、酯类大单体、丙烯酸、减缩功能单体和不饱和磺酸盐混合溶液。其制备方法中包括酯化产物制备；共聚反应；中和反应；利用椰油酸二乙醇酰胺与不饱和酸进行酯化制备酯化产物，具有成本低廉、操作简便的优点，而且所制得的酯化产物与减缩功能单体共聚反应，使聚羧酸减水剂主链上带有酰胺等亲水基团和减缩基团，所制备的聚羧酸减水剂具有较低的表面张力，有效降低混凝土的干燥收缩，有效提高了混凝土内部的力学性能和强度，具有显著的应用价值。
Shrinkage-reducing polycarboxylate superplasticizer and preparation method thereof
一种减缩型聚羧酸减水剂及其制备方法
ZHANG XIAOFANG (author) / SHI YANNA (author) / FANG YUNHUI (author) / LIN YANMEI (author) / GUO YUANQIANG (author) / ZHU SHAOHONG (author)
2021-04-27
Patent
Electronic Resource
Chinese
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