BigPatents India

An antimicrobial composition is formed from about 30 to about 70 wt% of an antimicrobial formulation and about 30 to about 70 wt% of a polyurethane resin or polyurethane hybrids, copolymers, or mixtures with other polymers such as polyesters, nitriles, PVC, and synthetic rubber latexes. The antimicrobial formulation is formed from about 60 to about 95 wt% of an antimicrobial material, about 1 to about 30 wt% calcium chelator, about 0.001 to about 0.25 wt% pigment, and about 0.5 to about 3.5 wt% lubricant. The polyurethane resin may be a prepolymer that polymerizes when exposed to moisture or it may be a latex dispersion in water. An antimicrobial coating may be formed on the surface of an article by applying an antimicrobial composition to the article; if a polyurethane prepolymer is used, the composition is exposed to moisture and if an aqueous dispersion is used, the water is evaporated. A coating may also be formed by making a mixture of the antimicrobial formulation and a resin and molding, overmolding, or extruding the article from the compounded mixture.