Preparation process and application of high-toughness polyurethane adhesive

The invention relates to an adhesive (IPC classification number: C09J167/00), in particular to a preparation process and application of a high-toughness polyurethane adhesive. The preparation process comprises the following steps: adding polyol and an auxiliary agent into a reaction kettle, heating, vacuumizing, cooling, adding isocyanate and part of a solvent, introducing nitrogen, carrying out prepolymerization, adding a catalyst, reacting, finally adding a silane modified polyester pre-product and the residual solvent, cooling, and discharging to obtain the high-toughness polyurethane adhesive. According to the preparation process of the high-toughness polyurethane adhesive provided by the invention, a film layer with sufficient toughness is formed by utilizing moisture curing reaction, and the high-toughness polyurethane adhesive is excellent in washing resistance. The temperature and the feeding sequence are strictly controlled, so that the reaction is promoted to be smoothly carried out, the intermediat