US 12,391,615 B1
Solid polycarboxylate superplasticizer as well as preparation method therefor and use thereof
Shanshan Qian, Wuhu (CN); Feng Ding, Wuhu (CN); Feng Jin, Wuhu (CN); Feng Chen, Wuhu (CN); Jinying Peng, Wuhu (CN); and Chang Zhao, Wuhu (CN)
Assigned to ANHUI CONCH MATERIAL TECHNOLOGY CO., LTD., Wuhu (CN)
Filed by Anhui Conch Material Technology Co., Ltd., Wuhu (CN)
Filed on Nov. 4, 2024, as Appl. No. 18/935,841.
Claims priority of application No. 202410795994.4 (CN), filed on Jun. 20, 2024.
Int. Cl. C04B 24/16 (2006.01); C08G 81/02 (2006.01); C04B 103/32 (2006.01)
CPC C04B 24/165 (2013.01) [C08G 81/025 (2013.01); C04B 2103/32 (2013.01)] 8 Claims
 
1. A preparation method for a solid polycarboxylate superplasticizer, comprising the following steps:
(1) mixing an unsaturated acid monomer, an unsaturated benzenesulfonic acid monomer, an oxidizing agent, a reducing agent, and a chain transfer agent to carry out a redox free radical polymerization reaction to obtain a polycarboxyl polymer; and
(2) mixing the polycarboxyl polymer with a monohydroxyl/monoamino polyoxyethylene ether to carry out a reaction, and after the reaction is completed and cooled, performing slicing or milling to obtain a solid polycarboxylate superplasticizer;
the solid polycarboxylate superplasticizer has a structure as follows:

OG Complex Work Unit Chemistry
wherein R1, R2, and R3 are selected from H, CH3, COOH, or CHCH3CH3, and the R2 and the R3 are not COOH simultaneously; a is equal to 0 or 1; A is O or NH; b and c are integers; x, y, and z are positive integers, and b+c is equal to 22-105; and x+y+z is equal to 23-63.