The invention relates to a method for preparing a polycarboxylate
superplasticizer by carrying out graft copolymerization on acrylic ester
polymer and
fatty acid vinyl ester. According to the method for preparing the polycarboxylate
superplasticizer by carrying out graft copolymerization on the acrylic ester
polymer and
fatty acid vinyl ester, acrylic ester
polymer and
fatty acid vinyl ester are taken as main reaction raw materials,
polymerization is carried out firstly, then
grafting is carried out and then alcoholysis and
hydrolysis are carried out to prepare the polycarboxylate
superplasticizer grafted and polymerized with the
acrylic polymer and fatty acid vinyl ester, namely acrylic ester is taken as a reaction
monomer,
polymerization is carried out under the actions of an initiating agent and a molecular weight regulating agent, then graft
polymerization is carried out with the fatty acid vinyl ester to obtain a graft
copolymer with the acrylic ester polymer as a main chain and polyvinyl ester fatty acid as a
side chain, and finally alcoholysis and
hydrolysis are carried out on the graft
copolymer. The method for preparing the polycarboxylate superplasticizer by carrying out graft copolymerization on the acrylic ester polymer and fatty acid vinyl ester has the advantages that a process is simple and easy to control, cost is low,
environmental protection is realized, no
pollution is produced, the fatty acid vinyl ester is used for replacing the existing polycarboxylate superplasticizer, and diversification of raw materials is enriched; and the prepared superplasticizer has good
cement paste fluidity and holding capability and shows good
cement adaptability and concrete application property.