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. 10, 2023
Filed:
Feb. 26, 2019
Sobute New Materials Co., Ltd., Nanjing, CN;
Bote Building Materials (Tianjin) Co., Ltd., Tianjin, CN;
Nanjing Bote New Materials Co., Ltd., Nanjing, CN;
Bote New Materials Taizhou Jiangyan Co., Ltd, Taizhou, CN;
Shuying Zhai, Nanjing, CN;
Yong Yang, Nanjing, CN;
Dongliang Zhou, Nanjing, CN;
Xin Shu, Nanjing, CN;
Qianping Ran, Nanjing, CN;
Han Yan, Nanjing, CN;
Hongxia Zhao, Nanjing, CN;
SOBUTE NEW MATERIALS CO., LTD., Nanjing, CN;
NANJING BOTE NEW MATERIALS CO., LTD., Tianjin, CN;
BOTE BUILDING MATERIALS (TIANJIN) CO., LTD., Taizhou, CN;
Abstract
Disclosed is a preparation method of a polycarboxylate water reducer having a regular sequence structure. The preparation method of the present invention comprises: performing Michael addition on polyethylene glycol ether acrylate macromonomer A and amino-containing carboxylic acid B for 5-12 hours, then cooling to 0° C., dropwise adding acryloyl chloride slowly and evenly, and further reacting for 12 hours at room temperature to obtain carboxyl-containing polyether macromonomer C; mixing the carboxyl-containing polyether macromonomer C, a small molecular RAFT reagent, an initiator, and water adequately; and holding the polymerization mass concentration at 30%-60% and heating to 60-80° C. in the atmosphere of N2 to react for 2-5 hours to obtain the polycarboxylate water reducer having a regular sequence structure.