A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for synthesizing cement dispersing agent by copolymerization of fatty acid vinyl ester monomers
The invention relates to a method for synthesizing a cement dispersing agent by copolymerization of fatty acid vinyl ester monomers. According to the method provided by the invention, fatty acid vinyl ester is used as a main reaction raw material, and the cement dispersing agent is prepared by a method of copolymerization after auto polymerization and alcoholysis. The method comprises the following concrete steps: with the fatty acid vinyl ester as a reaction monomer, a large fatty acid vinyl ester monomer with a certain molecular weight and with double bonds on the macromolecular tail end is polymerized under the action of an initiator and a particular chain transfer agent, then alcoholysis is carried out on the large monomer to obtain a large monomer with double bonds on the tail end and containing a polyvinyl alcohol structure, and the large monomer is copolymerized with small carboxylic acid monomers to synthesize the cement dispersing agent. The method provided by the invention is simple and easy to control the process, low in cost, environment-friendly and pollution-free, and the fatty acid vinyl ester is used for replacing ethylene oxide and epoxy propane. The cement dispersing agent prepared from the large monomer has good cement grout fluidity and holding capacity and embodies good cement adaptability and concrete application performance, thereby having a good market application prospect and competitiveness.
Method for synthesizing cement dispersing agent by copolymerization of fatty acid vinyl ester monomers
The invention relates to a method for synthesizing a cement dispersing agent by copolymerization of fatty acid vinyl ester monomers. According to the method provided by the invention, fatty acid vinyl ester is used as a main reaction raw material, and the cement dispersing agent is prepared by a method of copolymerization after auto polymerization and alcoholysis. The method comprises the following concrete steps: with the fatty acid vinyl ester as a reaction monomer, a large fatty acid vinyl ester monomer with a certain molecular weight and with double bonds on the macromolecular tail end is polymerized under the action of an initiator and a particular chain transfer agent, then alcoholysis is carried out on the large monomer to obtain a large monomer with double bonds on the tail end and containing a polyvinyl alcohol structure, and the large monomer is copolymerized with small carboxylic acid monomers to synthesize the cement dispersing agent. The method provided by the invention is simple and easy to control the process, low in cost, environment-friendly and pollution-free, and the fatty acid vinyl ester is used for replacing ethylene oxide and epoxy propane. The cement dispersing agent prepared from the large monomer has good cement grout fluidity and holding capacity and embodies good cement adaptability and concrete application performance, thereby having a good market application prospect and competitiveness.
Method for synthesizing cement dispersing agent by copolymerization of fatty acid vinyl ester monomers
LIU XIAO (author) / WANG ZIMING (author) / ZHAO MING (author) / LIU WEI (author) / YIN DONGJIE (author) / XUE LONG (author)
2015-05-20
Patent
Electronic Resource
English
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