A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High-workability slow-release polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of building materials, in particular to a high-workability slow-release polycarboxylate superplasticizer and a preparation method thereof. The high-workability slow-release polycarboxylate superplasticizer comprises an unsaturated polyether macro-monomer, a modified polyether macro-monomer, a functional monomer and unsaturated carboxylic acid (ester), wherein the functional monomer DM is prepared by carrying out hydroxymethylation reaction on acrylic acid hydroxyl mono-ester. The modified polyether macro-monomer is added into the high-workability slow-release polycarboxylate superplasticizer provided by the invention, and the steric hindrance effect is enhanced by virtue of the characteristic that a molecular chain in the molecular structure of the modified polyether macro-monomer is easy to curl up and fold, so that the synthesized water reducing agent is improved in the workability application of concrete. Meanwhile, the molecular structure of the superplasticizer contains multiple groups such as hydroxyl, carboxyl and ester groups, the difference of the hydrolysis rate of nonionic groups can be influenced by adjusting the proportion of all the groups, the preparation process is simple, heating and cooling processes are not needed, power consumption is small, and good production and application benefits are achieved.
本发明涉及建筑材料技术领域，特别涉及一种高和易性缓释型聚羧酸减水剂及其制备方法。所述高和易性缓释型聚羧酸减水剂，包括不饱和聚醚大单体、改性聚醚大单体、功能单体及不饱和羧酸(酯)；其中，所述功能单体DM为丙烯酸羟基单酯经羟甲基化反应制得。本发明提供的高和易性缓释型聚羧酸减水剂添加改性聚醚大单体，通过其分子结构中分子链易蜷缩折叠的特性，从而增强空间位阻效应，使得所合成的减水剂对混凝土和易性应用得到改善。同时本发明的减水剂分子结构中具备羟基、羧基、酯基等多元基团，可通过调整各基团的比例，影响非离子基团水解速率的差异，并且制备工艺简单，无需加热和降温过程，功耗较小，具备良好的生产和应用效益。
High-workability slow-release polycarboxylate superplasticizer and preparation method thereof
The invention relates to the technical field of building materials, in particular to a high-workability slow-release polycarboxylate superplasticizer and a preparation method thereof. The high-workability slow-release polycarboxylate superplasticizer comprises an unsaturated polyether macro-monomer, a modified polyether macro-monomer, a functional monomer and unsaturated carboxylic acid (ester), wherein the functional monomer DM is prepared by carrying out hydroxymethylation reaction on acrylic acid hydroxyl mono-ester. The modified polyether macro-monomer is added into the high-workability slow-release polycarboxylate superplasticizer provided by the invention, and the steric hindrance effect is enhanced by virtue of the characteristic that a molecular chain in the molecular structure of the modified polyether macro-monomer is easy to curl up and fold, so that the synthesized water reducing agent is improved in the workability application of concrete. Meanwhile, the molecular structure of the superplasticizer contains multiple groups such as hydroxyl, carboxyl and ester groups, the difference of the hydrolysis rate of nonionic groups can be influenced by adjusting the proportion of all the groups, the preparation process is simple, heating and cooling processes are not needed, power consumption is small, and good production and application benefits are achieved.
本发明涉及建筑材料技术领域，特别涉及一种高和易性缓释型聚羧酸减水剂及其制备方法。所述高和易性缓释型聚羧酸减水剂，包括不饱和聚醚大单体、改性聚醚大单体、功能单体及不饱和羧酸(酯)；其中，所述功能单体DM为丙烯酸羟基单酯经羟甲基化反应制得。本发明提供的高和易性缓释型聚羧酸减水剂添加改性聚醚大单体，通过其分子结构中分子链易蜷缩折叠的特性，从而增强空间位阻效应，使得所合成的减水剂对混凝土和易性应用得到改善。同时本发明的减水剂分子结构中具备羟基、羧基、酯基等多元基团，可通过调整各基团的比例，影响非离子基团水解速率的差异，并且制备工艺简单，无需加热和降温过程，功耗较小，具备良好的生产和应用效益。
High-workability slow-release polycarboxylate superplasticizer and preparation method thereof
一种高和易性缓释型聚羧酸减水剂及其制备方法
CHEN HAO (author) / FANG YUNHUI (author) / KE YULIANG (author) / LAI HUAZHEN (author) / AN XIAOQIANG (author) / CHEN CHANGJUN (author)
2022-02-08
Patent
Electronic Resource
Chinese
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