Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of shrinkage-reducing macromonomer and shrinkage-reducing polycarboxylate superplasticizer
The invention discloses a preparation method of a shrinkage-reducing macromonomer and a shrinkage-reducing polycarboxylate superplasticizer. The preparation method of the shrinkage-reducing macromonomer comprises the following steps: S1, reacting an unsaturated acid small monomer or anhydride with a small molecular ether monomer under the action of a first catalyst, a water-carrying agent and a polymerization inhibitor to obtain an esterified small monomer A; S2, adding an organic solvent into a reaction kettle, adding a first initiator, and dropwise adding a mixed solution of the esterified small monomer A and a terminal group functionalizing agent to obtain a self-polymerization product solution B; and S3, adding unsaturated halogenated hydrocarbon, an acid-binding agent and a second catalyst into the self-polymerization product solution B, and removing the organic solvent to obtain the shrinkage-reducing macromonomer. The preparation method of the shrinkage-reducing polycarboxylatesuperplasticizer comprises the following steps: S4, polymerizing a carboxylic acid small monomer aqueous solution, a shrinkage-reducing macromonomer and an unsaturated macromonomer for 4 hours to 7 hours under the action of an initiator aqueous solution and a chain transfer agent aqueous solution; and S5, adding solvent water to obtain the reduced polycarboxylate superplasticizer with different mass concentrations.
本发明公开了一种减缩大单体及减缩型聚羧酸减水剂的制备方法，减缩大单体的制备方法包括以下步骤：S1、将不饱和酸类小单体或者酸酐与小分子醚单体在第一催化剂、带水剂、阻聚剂的作用下得到酯化小单体A；S2、将有机溶剂加入反应釜中，加入第一引发剂并滴加酯化小单体A与端基官能化剂的混合溶液，得到自聚合产物溶液B；S3、将不饱和卤代烃、缚酸剂和第二催化剂加入自聚合产物溶液B中，脱去有机溶剂后得到减缩大单体。减缩型聚羧酸减水剂的制备方法包括以下步骤：S4、将羧酸类小单体水溶液、减缩大单体、不饱和大单体在引发剂水溶液、链转移剂水溶液的作用下聚合4h~7h；S5、加溶剂水后得到不同质量浓度的减缩型聚羧酸减水剂。
Preparation method of shrinkage-reducing macromonomer and shrinkage-reducing polycarboxylate superplasticizer
The invention discloses a preparation method of a shrinkage-reducing macromonomer and a shrinkage-reducing polycarboxylate superplasticizer. The preparation method of the shrinkage-reducing macromonomer comprises the following steps: S1, reacting an unsaturated acid small monomer or anhydride with a small molecular ether monomer under the action of a first catalyst, a water-carrying agent and a polymerization inhibitor to obtain an esterified small monomer A; S2, adding an organic solvent into a reaction kettle, adding a first initiator, and dropwise adding a mixed solution of the esterified small monomer A and a terminal group functionalizing agent to obtain a self-polymerization product solution B; and S3, adding unsaturated halogenated hydrocarbon, an acid-binding agent and a second catalyst into the self-polymerization product solution B, and removing the organic solvent to obtain the shrinkage-reducing macromonomer. The preparation method of the shrinkage-reducing polycarboxylatesuperplasticizer comprises the following steps: S4, polymerizing a carboxylic acid small monomer aqueous solution, a shrinkage-reducing macromonomer and an unsaturated macromonomer for 4 hours to 7 hours under the action of an initiator aqueous solution and a chain transfer agent aqueous solution; and S5, adding solvent water to obtain the reduced polycarboxylate superplasticizer with different mass concentrations.
本发明公开了一种减缩大单体及减缩型聚羧酸减水剂的制备方法，减缩大单体的制备方法包括以下步骤：S1、将不饱和酸类小单体或者酸酐与小分子醚单体在第一催化剂、带水剂、阻聚剂的作用下得到酯化小单体A；S2、将有机溶剂加入反应釜中，加入第一引发剂并滴加酯化小单体A与端基官能化剂的混合溶液，得到自聚合产物溶液B；S3、将不饱和卤代烃、缚酸剂和第二催化剂加入自聚合产物溶液B中，脱去有机溶剂后得到减缩大单体。减缩型聚羧酸减水剂的制备方法包括以下步骤：S4、将羧酸类小单体水溶液、减缩大单体、不饱和大单体在引发剂水溶液、链转移剂水溶液的作用下聚合4h~7h；S5、加溶剂水后得到不同质量浓度的减缩型聚羧酸减水剂。
Preparation method of shrinkage-reducing macromonomer and shrinkage-reducing polycarboxylate superplasticizer
一种减缩大单体及减缩型聚羧酸减水剂的制备方法
WANG XIAOYING (Autor:in) / MA JIANFENG (Autor:in) / YANG WENJIE (Autor:in) / SHI LONGFEI (Autor:in) / LUO ZILONG (Autor:in) / ZHANG YEMING (Autor:in) / SU PENGJU (Autor:in) / ZHOU YULUN (Autor:in) / HUANG TIANYONG (Autor:in)
02.04.2021
Patent
Elektronische Ressource
Chinesisch
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