Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Compound polycarboxylate superplasticizer and preparation method thereof
The invention provides a compound polycarboxylate superplasticizer and a preparation method thereof. The compound polycarboxylate superplasticizer comprises a polycarboxylate superplasticizer mother solution, wherein the polycarboxylate superplasticizer mother solution is obtained by the steps of mixing a terminal hydroxyl esterifiable polyether macromonomer, water, an initiator, a chain transfer agent and acrylic acid, reacting while heating and neutralizing until the pH value is up to 6-7; and the terminal hydroxyl esterifiable polyether macromonomer is obtained by carrying out esterification reaction on the terminal hydroxyl of a polyether macromonomer and carboxyl of macromolecular carboxylic acid under the catalytic action of a catalyst. The terminal hydroxyl esterifiable polyether macromonomer takes the macromolecular carboxylic acid as a terminal blocking group of the polyether macromonomer, so that the physical size of the tail end of a side chain is greatly increased, then, the physical size of the tail end of the side chain of the polycarboxylate superplasticizer mother solution synthesized and prepared by using the terminal hydroxyl esterifiable polyether macromonomer is greatly increased, the polycarboxylate superplasticizer mother solution is not easily inserted to a laminated structure of clay, and furthermore, a mud-resistant effect is achieved. Then, the polycarboxylate superplasticizer mother solution is compound to form the compound polycarboxylate superplasticizer provided by the invention, so that the working performance of concrete is better ensured.
Compound polycarboxylate superplasticizer and preparation method thereof
The invention provides a compound polycarboxylate superplasticizer and a preparation method thereof. The compound polycarboxylate superplasticizer comprises a polycarboxylate superplasticizer mother solution, wherein the polycarboxylate superplasticizer mother solution is obtained by the steps of mixing a terminal hydroxyl esterifiable polyether macromonomer, water, an initiator, a chain transfer agent and acrylic acid, reacting while heating and neutralizing until the pH value is up to 6-7; and the terminal hydroxyl esterifiable polyether macromonomer is obtained by carrying out esterification reaction on the terminal hydroxyl of a polyether macromonomer and carboxyl of macromolecular carboxylic acid under the catalytic action of a catalyst. The terminal hydroxyl esterifiable polyether macromonomer takes the macromolecular carboxylic acid as a terminal blocking group of the polyether macromonomer, so that the physical size of the tail end of a side chain is greatly increased, then, the physical size of the tail end of the side chain of the polycarboxylate superplasticizer mother solution synthesized and prepared by using the terminal hydroxyl esterifiable polyether macromonomer is greatly increased, the polycarboxylate superplasticizer mother solution is not easily inserted to a laminated structure of clay, and furthermore, a mud-resistant effect is achieved. Then, the polycarboxylate superplasticizer mother solution is compound to form the compound polycarboxylate superplasticizer provided by the invention, so that the working performance of concrete is better ensured.
Compound polycarboxylate superplasticizer and preparation method thereof
XU YILUN (Autor:in) / DAN WEI (Autor:in) / LYU HONGYU (Autor:in)
08.07.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2023
Polycarboxylate superplasticizer and preparation method thereof
| Europäisches Patentamt | 2024
Polycarboxylate superplasticizer and preparation method thereof
| Europäisches Patentamt | 2024
| Europäisches Patentamt | 2020
Polycarboxylate superplasticizer and preparation method thereof
| Europäisches Patentamt | 2024