Water-borne thermally reactive adhesive film formed from acrylic latex particles and blocked polyisocyanate

Abstract An adhesive film composed of acrylic latex particles and blocked polyisocyanate nanoparticles is developed as a water-borne, thermally reactive system. The adhesive film exhibits sufficient mobility, enabling intimate contact with adherend surfaces, and subsequently hardens through formation of urethane crosslinking upon heating. High adhesive strength is achieved for solvent-sensitive polymer substrates (e.g., polycarbonate and poly(ethylene terephthalate)), whose critical surface tension values are close to that of the adhesive film.