Water-dispersible copolymer for removing formaldehyde

The present invention relates to a water-dispersible copolymer for removing formaldehyde, wherein the water-dispersible copolymer is based on an acrylic copolymer, and contains one or a plurality of acetoacetyl functional groups and one or a plurality of hydrophilic groups, the acetoacetyl functional groups and the hydrophilic groups are chemically bonded to the molecular skeleton of the water-dispersible copolymer, the acrylic polymer has a number average molecular weight of 2000-100000 g/mol, and the acrylic copolymer comprises 10-30 wt% of the acetoacetyl functional groups. The invention further relates to an aqueous dispersion body containing the water-dispersible acrylic copolymer, and a product coated with the aqueous dispersion body.