Polyolefin coating for film and preparation method thereof

The invention discloses a preparation method of a polyolefin coating for a film. The preparation method comprises the following steps: (1) preparing a core emulsion of a hybrid polyolefin emulsion with a core-shell structure; (2) preparing a hybrid polyolefin emulsion with a core-shell structure; (3) preparation of hybrid polyolefin powder; and (4) preparing the polyolefin coating for the film. The invention has the following beneficial effects: (1) in the hybrid polyolefin emulsion, a plurality of monomers are subjected to a reaction, the copolymerization effect is improved, vinylidene norbornene is introduced, and the crystallization ability of the product is reduced; vinyl chloride is introduced to improve the toughness of the product; chlorine-containing elements such as chlorinated olefin are introduced, so that the toughness of a low-crystallization product is ensured; the chlorinated organosilicon compound is introduced, so that the surface tension of the material is reduced, the damp-heat aging resist