Preparation Principle of Polycarboxylate Superplasticizer


Today, I will simply talk about the preparation principle of polycarboxylic acid superplasticizer. As we all know, it is a polymer surfactant with comb structure synthesized by the principle of free radical copolymerization in aqueous solution by macromolecular compounds with sulfonic acid group, carboxyl group, amino group and polyoxyethylene side chain. The main raw materials required for the synthesis of polycarboxylic acid superplasticizer are: methacrylic acid, acrylic acid, ethyl acrylate, hydroxyethyl acrylate, sodium allyl sulfonate, methyl methacrylate, 2-acrylamido-2-methacrylic acid, methoxy polyoxyethylene methacrylate, ethoxy polyethylene glycol acrylate, allyl ether, etc. The initiators that can be used in the polymerization process are: persulfate aqueous initiator, benzoyl peroxide, azodiisobutyronitrile; chain transfer agents are: 3-mercaptopropionic acid, mercaptoacetic acid, mercaptoethanol, isopropanol, and the like. The above is the preparation principle of polycarboxylic acid superplasticizer. Hope to help everyone.

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