Hot-melt adhesive capable of being photo-cured under low UV illumination intensity and preparation method of hot-melt adhesive

A functional group is added on the basis of a traditional UV-curable SBR hot melt adhesive, a photo-free radical initiator is decomposed into photo-free radicals under the action of illumination, the photo-free radicals attack an SBC rubber polymer with double bonds at the tail end, and efficient cross-linking of the SBC rubber polymer is initiated; meanwhile, light free radicals attack vinyl-terminated polybutadiene or isoprene-terminated rubber, so that double bonds of the vinyl-terminated polybutadiene or isoprene-terminated rubber are opened for further crosslinking, and the vinyl-terminated SBC rubber polymer with the double bonds at the tail end and the vinyl-terminated polybutadiene or isoprene-terminated rubber can also be subjected to cross-crosslinking, and due to the fact that the vinyl-terminated activity of the polymer in the scheme of the patent is high, the vinyl-terminated SBC rubber polymer with the double bonds at the tail end and the vinyl-terminated polybutadiene or isoprene-terminated The