Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method for sulfate-compatible polycarboxylic water reducer
The invention relates to a preparation method for a sulfate-compatible polycarboxylic water reducer, and belongs to the field of cement concrete water reducers. The preparation method comprises the following specific steps: firstly, under the action of lauryl sodium sulfate and an initiator, preparing terpolymer from 2-acrylamide-2-methyl propane sulfonic acid, a vinyl aromatic compound monomer A and an unsaturated amide monomer B; secondly, under the action of a redox system initiator and a chain transfer agent, producing an aqueous-phase free radical polymerization reaction of the terpolymer, a polyoxyethylene-polyoxypropylene copolymer monomer C, an unsaturated carboxylic monomer D and a silane coupling agent monomer E, and after finishing the reaction, regulating the pH (potential of hydrogen) value to prepare the sulfate-compatible polycarboxylic water reducer. The sulfate-compatible polycarboxylic water reducer prepared with the method has the advantages of high cost performance, simplicity for reaction, easiness for control, strong cement adaptability and the like, and is polymerized in an aqueous solution and free of 'three-waste' emission, thereby belonging to clean production.
Preparation method for sulfate-compatible polycarboxylic water reducer
The invention relates to a preparation method for a sulfate-compatible polycarboxylic water reducer, and belongs to the field of cement concrete water reducers. The preparation method comprises the following specific steps: firstly, under the action of lauryl sodium sulfate and an initiator, preparing terpolymer from 2-acrylamide-2-methyl propane sulfonic acid, a vinyl aromatic compound monomer A and an unsaturated amide monomer B; secondly, under the action of a redox system initiator and a chain transfer agent, producing an aqueous-phase free radical polymerization reaction of the terpolymer, a polyoxyethylene-polyoxypropylene copolymer monomer C, an unsaturated carboxylic monomer D and a silane coupling agent monomer E, and after finishing the reaction, regulating the pH (potential of hydrogen) value to prepare the sulfate-compatible polycarboxylic water reducer. The sulfate-compatible polycarboxylic water reducer prepared with the method has the advantages of high cost performance, simplicity for reaction, easiness for control, strong cement adaptability and the like, and is polymerized in an aqueous solution and free of 'three-waste' emission, thereby belonging to clean production.
Preparation method for sulfate-compatible polycarboxylic water reducer
CHEN GUOXIN (Autor:in) / ZHU YERAN (Autor:in) / HUANG GUOHONG (Autor:in) / WANG DONG (Autor:in) / DU ZHIQIN (Autor:in) / LIU XINGRONG (Autor:in) / CAI MING (Autor:in) / FU DANHUA (Autor:in) / WANG FENG (Autor:in)
06.05.2015
Patent
Elektronische Ressource
Englisch
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