The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 2019
Filed:
Aug. 28, 2017
Jiangsu Arit New Materials Co., Ltd., Nanjing, CN;
Shanshan Qian, Nanjing, CN;
Zhaolai Guo, Nanjing, CN;
Chunyang Zheng, Nanjing, CN;
Chunman Huang, Nanjing, CN;
Haidong Jiang, Nanjing, CN;
Gaoming Wang, Nanjing, CN;
Yi Wang, Nanjing, CN;
Mengting Li, Nanjing, CN;
Ying Qiu, Nanjing, CN;
Jiezhong Gan, Nanjing, CN;
JIANGSU ARIT NEW MATERIALS CO., LTD., Nanjing, CN;
Abstract
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.