Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-branching retardation type polycarboxylic acid water reducing agent
The invention discloses a preparation method of a high-branching retardation type polycarboxylic acid water reducing agent. The preparation method comprises the following steps: firstly, preparing a high-branching copolymerization product containing an azide group; secondly, preparing alkynyl methoxy polyethylene glycol; thirdly, performing a click chemical reaction between the high-branching copolymerization product containing the azide group and alkynyl methoxy polyethylene glycol to obtain the high-branching retardation type polycarboxylic acid water reducing agent. The molecular weight of the high-branching copolymerization product containing the azide group is controlled, the product performance is adjusted by the degree of branching and the molecular weight of methoxy polyethylene glycol, the reaction is quick, the efficiency is high, the water reducing agent is nontoxic and pollution-free, and the operation is simple and convenient. The polycarboxylic acid water reducing agent prepared according to the preparation method is a functional polycarboxylic acid high-efficiency water reducing agent, and has the advantages of being strong in concrete adaptability, high in water reducing rate, long in slump retaining time, and stable in product performance.
Preparation method of high-branching retardation type polycarboxylic acid water reducing agent
The invention discloses a preparation method of a high-branching retardation type polycarboxylic acid water reducing agent. The preparation method comprises the following steps: firstly, preparing a high-branching copolymerization product containing an azide group; secondly, preparing alkynyl methoxy polyethylene glycol; thirdly, performing a click chemical reaction between the high-branching copolymerization product containing the azide group and alkynyl methoxy polyethylene glycol to obtain the high-branching retardation type polycarboxylic acid water reducing agent. The molecular weight of the high-branching copolymerization product containing the azide group is controlled, the product performance is adjusted by the degree of branching and the molecular weight of methoxy polyethylene glycol, the reaction is quick, the efficiency is high, the water reducing agent is nontoxic and pollution-free, and the operation is simple and convenient. The polycarboxylic acid water reducing agent prepared according to the preparation method is a functional polycarboxylic acid high-efficiency water reducing agent, and has the advantages of being strong in concrete adaptability, high in water reducing rate, long in slump retaining time, and stable in product performance.
Preparation method of high-branching retardation type polycarboxylic acid water reducing agent
QIAN SHANSHAN (Autor:in) / SHI YU (Autor:in) / DING BEI (Autor:in) / WANG YI (Autor:in) / JIANG HAIDONG (Autor:in) / ZHENG CHUNYANG (Autor:in)
23.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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