Polymeric compositions that include polyurethane polymers derived from a
polyisocyanate compound and a polyactive hydrogen compound. The
polyurethane compound is at least partially endcapped with a group
including at least one antimicrobial quaternary ammonium compound. The
polymeric composition of the present invention is capable of forming a
self-supporting film. The polymeric compositions are suitable for coating
substrates to effectively kill or prevent the growth of microorganisms
such as bacteria, mold, mildew, algae fungi and the like. The polymeric
compositions are particularly useful for protecting construction
materials used in moist, outdoor environments to prevent discoloration or
decay from microorganisms and for surfaces in health care facilities to
mitigate the spread of pathogens.