An aqueous antibacterial polymer emulsion and coating compositions are provided. The aqueous antibacterial polymer emulsion comprising a polymer A, an oxidant and a metal complexed with a copolymer B comprising heterocyclic containing monomers wherein the metal is selected from copper, silver, gold, tin, zinc and combinations thereof and wherein the emulsion is heat stable. The coating compositions made therefrom provide persistent, broad spectrum antibacterial activity without discoloration problem upon exposure to heat and/or sun light.
