Jiangsu Arit New Materials Co., Ltd.

Mengting Li

Shanshan Qian

Chunyang Zheng

Chunman Huang

Jiezhong Gan

Haidong Jiang

Yi Wang

Ying Qiu

Zhaolai Guo

Gaoming Wang

The present invention discloses a preparation method of a polycarboxylate superplasticizer with carbon dioxide, comprising the following steps: (1) preparing a polycarboxylate superplasticizer prepolymer: performing an oxidation-reduction radical polymerization of an unsaturated macromonomer, an unsaturated phenol derivative, a reducing agent, an initiator and a chain transfer agent with different proportions under a nitrogen atmosphere to obtain a novel polycarboxylate superplasticizer prepolymer with different molecular weight; adjusting the pH by adding an alkali; (2) preparing a polycarboxylate superplasticizer: performing a Koble-Schmitt reaction between the polycarboxylate superplasticizer prepolymer and a carbon dioxide for a certain time to obtain the polycarboxylate superplasticizer. The polycarboxylate superplasticizer prepared by the method of the present invention retains the advantages of the existing water-reducing admixture of the polyether monomer compounds, and the production process is simple, safe, controllable, less side effect and has a better cost effective and competitive advantage.

Preparation method of polycarboxylate superplasticizer with carbon dioxide

Growing community of inventors

Nanjing, China

Mengting Li