Waterborne polyurethane shoe adhesive and preparation method thereof

The invention discloses waterborne polyurethane shoe adhesive and a preparation method thereof and relates to adhesive. The adhesive comprises toluene diisocyanate, polyethyleneglycol, 2,2-dimethylol propionic acid, N-(2-aminoethyl)-2-aminoethyl sulfonate, epoxide resin, diacetone acrylamide, adipic dihy drazides, triethylamine, quadrol, acrylic hydroxy ester monomer, acrylic ester monomer and the like. The preparation method comprises steps of adding butanone, the polyethyleneglycol, the 2,2-dimethylol propionic acid, the toluene diisocyanate and a catalyst into a container, adding the epoxide resin and obtaining a polyurethane solution; adding acrylic hydroxy ester, adding the acrylic ester monomer, the diacetone acrylamide and the triethylamine and obtaining the polyurethane solution; adding the N-(2-aminoethyl)-2-aminoethyl sulfonate, conducting chain extension, adding the quadrol and obtaining the polyurethane solution; adding water and obtaining the polyurethane solution; addinga butanone solution with