Medium-resistant polyurethane laminating adhesive as well as preparation method and application thereof

The invention relates to a medium-resistant polyurethane laminating adhesive, which comprises a component A as a curing agent and a component B as a main component. When in use, the component A and the component B are film-laminated in accordance with a ratio of NCO to OH of 1.1 to 2, wherein the component A is an isocyanate-terminated prepolymer prepared from isocyanate, polyol a, epoxy resin, asolvent a, and the component B is a hydroxyl-terminated prepolymer prepared from special polyol, polyol b, epoxy resin, isocyanate and a solvent b. The invention also discloses a preparation method and application of the medium-resistant polyurethane laminating adhesive. The medium-resistant polyurethane laminating adhesive disclosed by the invention can be used for laminating plastic, aluminum and plastic structures and the like, and the laminated packaging material can package food additives such as vinegar-pepper, salt, oil, baijiu, and ethyl maltol, and mixed solvents such as toluene, xylene, DMF, ethyl acetate, c