Acrylate emulsion for electrical steel coating and preparation method thereof

The invention belongs to the technical field of preparation of organic emulsions for electrical steel functional coatings, and discloses an acrylate emulsion for electrical steel coatings and a preparation method thereof.The acrylate emulsion is prepared from, by mass, 50-75 parts of hard monomers, 30-50 parts of soft monomers, 3-7 parts of functional monomers, 2-5 parts of polymerizable emulsifiers and 0.2-0.8 part of initiators, 0.5 to 0.8 part of a buffering agent and 100 to 150 parts of deionized water. According to the invention, a process of combining soap-free emulsion polymerization and core-shell emulsion polymerization is adopted, and a self-crosslinking monomer is introduced, so that the thermosetting acrylate emulsion with a core-shell structure is prepared. The electrical steel insulating paint prepared from the acrylate emulsion as an organic resin emulsion and a certain acidic inorganic salt solution is low in curing temperature, a pre-coating layer formed after curing has good compatibility wi