Formaldehyde removal emulsion as well as preparation method and application thereof

The invention relates to the technical field of formaldehyde removal coatings, and particularly discloses a formaldehyde removal emulsion as well as a preparation method and application thereof. The formaldehyde removal emulsion comprises a formaldehyde removal functional monomer. In the formaldehyde removal functional monomer, hydrogen atoms of methylene between two carbonyl groups have extremely high reaction activity and can be subjected to nucleophilic addition reaction similar to aldol condensation with formaldehyde, so that the effect of removing formaldehyde is achieved. The reaction product can be further subjected to a cross-linking reaction, and the cross-linking degree and compactness of the formaldehyde-removing emulsion or the formaldehyde-removing coating are improved, so that the mechanical strength of a paint film is improved, and the water resistance and the stain resistance are improved. The reaction mechanism of the formaldehyde-removing functional monomer and formaldehyde is totally differ