Detachable polyurethane hot melt adhesive, preparation raw materials and preparation method and bonding method of detachable polyurethane hot melt adhesive

The invention belongs to the field of polyurethane adhesives, and relates to a detachable polyurethane hot melt adhesive, preparation raw materials, and a preparation method and a bonding method of the detachable polyurethane hot melt adhesive. The detachable polyurethane hot melt adhesive is prepared from the following raw materials: a polyol compound, a polyisocyanate compound, a modifier I, a modifier II and a catalyst, wherein the modifier I is selected from at least one of furfuryl alcohol, furfuryl mercaptan and furfuryl amine, the modifier II is bismaleimide and/or p-benzoquinone, the equivalence ratio of hydroxyl in the polyol compound to isocyanate groups in the polyisocyanate compound to active functional groups in the modifier I is 1:(1.8-2.4):(0.16-1.12), and the equivalent weight of the isocyanate groups in the polyisocyanate compound is not less than the sum of the equivalent weight of the hydroxyl in the polyol compound and the equivalent weight of the active functional groups in the modifier I