Polyurethane adhesive for single-side gluing shoes and preparation method of polyurethane adhesive

The invention discloses a polyurethane adhesive for single-side gluing shoes and a preparation method of the polyurethane adhesive. The adhesive is prepared by mixing a component A and a component B in a ratio of 100: (5-10). The component A is prepared from a fluorine-modified polybutadiene polyurethane dispersion, colloidal sulfur and a thickening agent, and the viscosity of the component A is proper; and the component B is prepared by dissolving an isocyanate curing agent and a europium vulcanization accelerator in a solvent. The adhesive can quickly form a physical riveting effect with a shoe material at the initial stage of adhesive brushing, the isocyanate curing agent can improve the cohesive force and hydrolysis resistance of the adhesive, and the vulcanization accelerator can improve the cohesive force of the adhesive and can form chemical crosslinking with the shoe material. According to the adhesive, the double-sided sizing effect of a conventional adhesive can be achieved only through single-sided