A novel N-halamine monomer has been prepared which can be copolymerized with a commercial waterborne acrylic polyol and a commercial isocyanate to produce a polyurethane coating which can be applied to a broad variety of surfaces. The coating can then be chlorinated with a source of free chlorine, such as bleach, to render it biocidal. Once the coating loses its chlorine loading, and hence its biocidal activity, regeneration is possible by further exposure to free chlorine. In one experimental observation a coating on a wall has retained its biocidal activity for more than six months. The biocidal coating should have many applications, including in medical facilities, in food preparation areas, in prevention of biofouling in aqueous and humid environments, etc.
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