Water-based adhesive with low glass transition temperature as well as preparation method and application of water-based adhesive

The invention relates to the technical field of functional material preparation, in particular to a water-based adhesive with low glass transition temperature as well as a preparation method and application thereof, and the water-based adhesive is prepared from the following raw materials in parts by weight: 310-335 parts of vinyl acetate; 120 to 165 parts of butyl acrylate; 4.0 to 5.5 parts of acrylic acid; 17 to 88 parts of polyvinyl alcohol, and 30 to 35 parts of polyvinyl alcohol; 25 to 27.5 parts of C12 to C14 secondary alcohol polyoxyethylene ether; 0.9 to 1.0 part of ammonium persulfate; 22 to 25 parts of triethyl citrate; 3.5 to 4.0 parts of sodium bicarbonate; and 675.9 to 801.4 parts of water. The defects that an existing water-based adhesive is high in glass-transition temperature and low in drying speed are overcome, the water-based adhesive high in drying speed is provided by reducing the glass-transition temperature of the water-based adhesive, and meanwhile the prepared water-based adhesive is