Core-shell styrene-acrylic emulsion for priming paint and preparation method and application of core-shell styrene-acrylic emulsion

The invention relates to a core-shell styrene-acrylic emulsion for priming paint and belongs to the technical field of waterproof paint. The core-shell styrene-acrylic emulsion comprises the followingingredients in parts by mass: 5.07-30 parts of core monomer, 5.07-30 parts of shell monomer, 0.6-12 parts of emulsifier, 0.02-5 parts of initiator, 0.02-5 parts of chain transfer agent, 0.02-5 partsof pH buffering agent, 0.02-2 parts of first antifoamer, 0.02-2 parts of first preservative agent and 40-50 parts of deionized water; the core monomer is a main monomer, and the shell monomer comprises 4.93-20 parts of main monomer, 0.02-2.55 parts of polar monomer, 0.02-2.5 parts of phosphate monomer and 0.05-5 parts of ureido monomer. The invention further provides a preparation method of the core-shell styrene-acrylic emulsion for priming paint and application of the core-shell styrene-acrylic emulsion for priming paint in aqueous sealing priming paint. The priming paint prepared by using the core-shell styrene-acry