Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing liquid alkali-free accelerator through esterification and compounding of polycarboxylic acid
The invention relates to a method for preparing a liquid alkali-free accelerator by esterification and compounding of polycarboxylic acid, which comprises the following steps: carrying out ring-opening polymerization on a cyclic amide monomer, carrying out esterification reaction on the cyclic amide monomer and polycarboxylic acid to synthesize a carboxyl-ammonia organic complexing agent, and compounding other components to prepare the liquid alkali-free accelerator, namely, carrying out ring-opening polymerization on the cyclic amide monomer to obtain a polymer main chain; then carrying out esterification reaction with polycarboxylic acid to obtain a carboxyl-ammonia organic complexing agent, and compounding the carboxyl-ammonia organic complexing agent with components such as aluminum sulfate and montmorillonite powder to obtain the liquid alkali-free accelerator. The carboxyl-ammonia organic complexing agent component prepared based on molecular structure innovative design combines the performance advantages of cyclic amide polymer and polycarboxylic acid, and the composite polyfunctional group has excellent ion complexing ability, so that the problems of poor stability, low energy efficiency, insufficient aluminum ion capacity and the like of the accelerator can be obviously improved; the prepared liquid alkali-free accelerator can greatly shorten the setting time of a cement-based material and improve the early strength, and has excellent application potential and development prospect.
本发明涉及聚羧酸酯化复合制备液体无碱速凝剂的方法，通过环酰胺单体开环聚合再与聚羧酸酯化反应合成羧氨有机络合剂而后复合其它组分的方法制备一种液体无碱速凝剂，即环酰胺单体开环聚合得到多聚体主链，然后与聚羧酸发生酯化反应得到羧氨有机络合剂，再与硫酸铝、蒙脱石散等组分复合得到液体无碱速凝剂。本发明基于分子结构创新设计制备的羧氨有机络合剂组分，结合了环酰胺多聚体与聚羧酸的性能优势，复合的多官能团具有优异的离子络合能力，可显著改善速凝剂稳定性差、能效低、铝离子容量不足等问题，制备的液体无碱速凝剂能够大幅缩短水泥基材料的凝结时间并提升早期强度，具有优良的应用潜力及发展前景。
Method for preparing liquid alkali-free accelerator through esterification and compounding of polycarboxylic acid
The invention relates to a method for preparing a liquid alkali-free accelerator by esterification and compounding of polycarboxylic acid, which comprises the following steps: carrying out ring-opening polymerization on a cyclic amide monomer, carrying out esterification reaction on the cyclic amide monomer and polycarboxylic acid to synthesize a carboxyl-ammonia organic complexing agent, and compounding other components to prepare the liquid alkali-free accelerator, namely, carrying out ring-opening polymerization on the cyclic amide monomer to obtain a polymer main chain; then carrying out esterification reaction with polycarboxylic acid to obtain a carboxyl-ammonia organic complexing agent, and compounding the carboxyl-ammonia organic complexing agent with components such as aluminum sulfate and montmorillonite powder to obtain the liquid alkali-free accelerator. The carboxyl-ammonia organic complexing agent component prepared based on molecular structure innovative design combines the performance advantages of cyclic amide polymer and polycarboxylic acid, and the composite polyfunctional group has excellent ion complexing ability, so that the problems of poor stability, low energy efficiency, insufficient aluminum ion capacity and the like of the accelerator can be obviously improved; the prepared liquid alkali-free accelerator can greatly shorten the setting time of a cement-based material and improve the early strength, and has excellent application potential and development prospect.
本发明涉及聚羧酸酯化复合制备液体无碱速凝剂的方法，通过环酰胺单体开环聚合再与聚羧酸酯化反应合成羧氨有机络合剂而后复合其它组分的方法制备一种液体无碱速凝剂，即环酰胺单体开环聚合得到多聚体主链，然后与聚羧酸发生酯化反应得到羧氨有机络合剂，再与硫酸铝、蒙脱石散等组分复合得到液体无碱速凝剂。本发明基于分子结构创新设计制备的羧氨有机络合剂组分，结合了环酰胺多聚体与聚羧酸的性能优势，复合的多官能团具有优异的离子络合能力，可显著改善速凝剂稳定性差、能效低、铝离子容量不足等问题，制备的液体无碱速凝剂能够大幅缩短水泥基材料的凝结时间并提升早期强度，具有优良的应用潜力及发展前景。
Method for preparing liquid alkali-free accelerator through esterification and compounding of polycarboxylic acid
聚羧酸酯化复合制备液体无碱速凝剂的方法
LIU XIAO (Autor:in) / XIE HUI (Autor:in) / ZHU YIZHOU (Autor:in) / YANG WEIGANG (Autor:in) / YANG JIAN (Autor:in) / WANG ZIMING (Autor:in) / LUO QIFENG (Autor:in) / ZHANG YUANYUAN (Autor:in) / CHEN JIAHAO (Autor:in) / XU FANDING (Autor:in)
10.05.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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