Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for synthesizing cement dispersing agent by using terminated functional polyethylene fatty acid ester macromonomer
The invention relates to a method for synthesizing a cement dispersing agent by using a terminated functional polyethylene fatty acid ester macromonomer. The cement dispersing agent is prepared by taking fatty acid vinyl ester as a main reaction raw material through a method comprising the steps of autopolymerization, substitution, alcoholysis and copolymerization, namely, polymerizing by taking fatty acid vinyl ester as a reaction monomer under the action of an initiator and a chain transfer agent to generate a polymer; then, carrying out substitution reaction on the polymer and an unsaturated chlorinated substance to obtain a polyethylene fatty acid ester macromonomer of which the macromolecular chain terminal is a double bond; next, carrying out alcoholysis on the macromonomer to prepare a macromonomer with the double bond at the terminal and with a polyvinyl alcohol structure; and finally, carrying out copolymerization reaction on the macromonomer and a carboxylic acid micromonomer to prepare the cement dispersing agent. The method is simple and easily-controlled in process, low in cost, environment-friendly and pollution-free; and the cement dispersing agent prepared by taking fatty acid vinyl ester as the raw material has favorable net cement paste flowability and holding capacity and shows favorable cement adaptability and concrete application property.
Method for synthesizing cement dispersing agent by using terminated functional polyethylene fatty acid ester macromonomer
The invention relates to a method for synthesizing a cement dispersing agent by using a terminated functional polyethylene fatty acid ester macromonomer. The cement dispersing agent is prepared by taking fatty acid vinyl ester as a main reaction raw material through a method comprising the steps of autopolymerization, substitution, alcoholysis and copolymerization, namely, polymerizing by taking fatty acid vinyl ester as a reaction monomer under the action of an initiator and a chain transfer agent to generate a polymer; then, carrying out substitution reaction on the polymer and an unsaturated chlorinated substance to obtain a polyethylene fatty acid ester macromonomer of which the macromolecular chain terminal is a double bond; next, carrying out alcoholysis on the macromonomer to prepare a macromonomer with the double bond at the terminal and with a polyvinyl alcohol structure; and finally, carrying out copolymerization reaction on the macromonomer and a carboxylic acid micromonomer to prepare the cement dispersing agent. The method is simple and easily-controlled in process, low in cost, environment-friendly and pollution-free; and the cement dispersing agent prepared by taking fatty acid vinyl ester as the raw material has favorable net cement paste flowability and holding capacity and shows favorable cement adaptability and concrete application property.
Method for synthesizing cement dispersing agent by using terminated functional polyethylene fatty acid ester macromonomer
LIU XIAO (Autor:in) / ZHAO MING (Autor:in) / WANG ZIMING (Autor:in) / LIU WEI (Autor:in) / YIN DONGJIE (Autor:in) / PANG XIAOFAN (Autor:in)
20.05.2015
Patent
Elektronische Ressource
Englisch
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