Preparation method of nuclear shell water-based polyurethane-acrylate composite emulsion adhesive for polyolefin film composition

The invention discloses a preparation method of a core-shell water-based polyurethane-acrylate composite emulsion adhesive for polyolefin film lamination. The preparation method comprises: preparation of a vinyl-terminated net-shaped polyurethane emulsion, preparation of a core layer polyurethane-acrylate interpenetrating network polymer and preparation of the core-shell polyurethane-acrylate composite emulsion adhesive. By using the method, the defects that the existing water-based laminating glue product is low in adhering strength, poor in water tolerance and low in drying speed are solved. The adhesive prepared by using the method has the advantages of high peeling strength, good water tolerance, high drying speed and low VOC (volatile organic compound) content and the like.