The water-based modification of adhesives refers to water-based adhesives prepared with water as the solvent or dispersion medium. By eliminating organic solvents, it completely avoids solvent pollution.
Emulsion-type acrylic pressure-sensitive adhesives can replace solvent-based ones. Water-based laminating adhesives have also started to replace solvent-based counterparts, offering non-toxicity, non-flammability, environmental friendliness and safe use.
Blending isocyanate or prepolymer into polyvinyl alcohol (PVA) aqueous solution to produce vinyl polyurethane emulsion can replace urea-formaldehyde adhesives, thoroughly solving the formaldehyde emission problem.
Water-based adhesives are highly favored for their non-toxicity and environmental friendliness, but they have shortcomings such as slow drying speed, poor water resistance and inadequate frost resistance.
Measures should be taken to increase the solid content, accelerate drying speed, and adopt crosslinking methods to improve drying efficiency and water resistance, thereby expanding their application scope.