A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ether polycarboxylic acid water reducing agent as well as preparation method and application thereof
The invention relates to the technical field of concrete admixtures, in particular to an ether polycarboxylic acid water reducer as well as a preparation method and application thereof. The preparation method of the ether polycarboxylic acid water reducing agent comprises the following steps: carrying out esterification reaction on hydroxycinnamic acid and polyethylene glycol, and carrying out free radical polymerization reaction on an obtained esterification monomer, an unsaturated polyether monomer, an unsaturated carboxylic acid monomer and a carboxylic acid phenyl ester monomer. The preparation method is characterized in that an unsaturated polyether monomer, an unsaturated carboxylic acid monomer, an esterification monomer and a carboxylic acid phenyl ester monomer are copolymerized to be introduced into a polycarboxylic acid molecular chain at the same time, the esterification monomer contains polyhydroxy phenyl and a polyethylene glycol chain segment, the carboxylic acid phenyl ester monomer contains two benzoic acid groups/benzoate groups/benzoate, and the two benzoic acid groups/benzoate groups/benzoate are copolymerized. Therefore, the obtained ether polycarboxylic acid water reducer not only is small in slump and expansion degree gradual loss, but also is low in corresponding concrete bleeding rate and has good mud resistance and workability.
本发明涉及混凝土外加剂技术领域，涉及一种醚类聚羧酸减水剂及其制备方法和应用。所述醚类聚羧酸减水剂的制备方法包括以下步骤：将羟基苯丙烯酸与聚乙二醇进行酯化反应，将所得酯化单体与不饱和聚醚单体、不饱和羧酸单体以及羧酸苯酯单体进行自由基聚合反应。本发明的关键在于将不饱和聚醚单体、不饱和羧酸单体、酯化单体以及羧酸苯酯单体进行共聚以同时引入聚羧酸分子链上，其中，酯化单体既含有多羟基苯基又含有聚乙二醇链段，羧酸苯酯单体中含有两个苯甲酸基/苯甲酸酯基/苯甲酸盐，如此所得醚类聚羧酸减水剂不仅坍落度和扩展度经时损失小，而且对应的混凝土泌水率低并具有良好抗泥性及和易性。
Ether polycarboxylic acid water reducing agent as well as preparation method and application thereof
The invention relates to the technical field of concrete admixtures, in particular to an ether polycarboxylic acid water reducer as well as a preparation method and application thereof. The preparation method of the ether polycarboxylic acid water reducing agent comprises the following steps: carrying out esterification reaction on hydroxycinnamic acid and polyethylene glycol, and carrying out free radical polymerization reaction on an obtained esterification monomer, an unsaturated polyether monomer, an unsaturated carboxylic acid monomer and a carboxylic acid phenyl ester monomer. The preparation method is characterized in that an unsaturated polyether monomer, an unsaturated carboxylic acid monomer, an esterification monomer and a carboxylic acid phenyl ester monomer are copolymerized to be introduced into a polycarboxylic acid molecular chain at the same time, the esterification monomer contains polyhydroxy phenyl and a polyethylene glycol chain segment, the carboxylic acid phenyl ester monomer contains two benzoic acid groups/benzoate groups/benzoate, and the two benzoic acid groups/benzoate groups/benzoate are copolymerized. Therefore, the obtained ether polycarboxylic acid water reducer not only is small in slump and expansion degree gradual loss, but also is low in corresponding concrete bleeding rate and has good mud resistance and workability.
本发明涉及混凝土外加剂技术领域，涉及一种醚类聚羧酸减水剂及其制备方法和应用。所述醚类聚羧酸减水剂的制备方法包括以下步骤：将羟基苯丙烯酸与聚乙二醇进行酯化反应，将所得酯化单体与不饱和聚醚单体、不饱和羧酸单体以及羧酸苯酯单体进行自由基聚合反应。本发明的关键在于将不饱和聚醚单体、不饱和羧酸单体、酯化单体以及羧酸苯酯单体进行共聚以同时引入聚羧酸分子链上，其中，酯化单体既含有多羟基苯基又含有聚乙二醇链段，羧酸苯酯单体中含有两个苯甲酸基/苯甲酸酯基/苯甲酸盐，如此所得醚类聚羧酸减水剂不仅坍落度和扩展度经时损失小，而且对应的混凝土泌水率低并具有良好抗泥性及和易性。
Ether polycarboxylic acid water reducing agent as well as preparation method and application thereof
一种醚类聚羧酸减水剂及其制备方法和应用
KE YULIANG (author) / MIAO DONGHUI (author) / FANG YUNHUI (author) / CHEN HAO (author) / QUAN LONG (author)
2024-03-29
Patent
Electronic Resource
Chinese
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