Core-shell type acrylate polyurethane emulsion primer as well as preparation method and application thereof

The invention belongs to the technical field of polymer films, and particularly relates to a core-shell type acrylate polyurethane emulsion primer as well as a preparation method and application thereof, the primer is formed by mixing a soft-core and hard-shell type acrylate polyurethane emulsion, a coalescing agent, other auxiliaries and an ink absorbing agent; wherein the Tg of the acrylate polyurethane emulsion core layer is-30 to-5 DEG C, the Tg of the shell layer containing a small amount of polyurethane is 10-45 DEG C, the mass of polymerizable polyurethane acrylate accounts for 1-10% of the mass of shell layer monomers, the mass ratio of the core layer monomers to the shell layer monomers is 1: (1-6), the mass of the film-forming agent accounts for 1-20% of the mass of the acrylate polyurethane emulsion, and the mass of other auxiliaries accounts for 0.1-2% of the mass of the acrylate polyurethane emulsion. And the ink absorbing agent accounts for 0.1-1% of the mass of the acrylate polyurethane emulsio