Patent ID: 6730294
Filing Date: 2004-05-04
Classification: A01N,A61L,C11D,D06M,D21H

Abstract:
A method of forming a water soluble biocidal film on a solid surface which is one of a solid household surface, a food preparation surface, or medical surface, which protects the solid surface against reinfection by microorganisms, the method comprising:providing a liquid biocidal composition comprised of, based on total weight of the liquid biocidal composition: from 0.1 to 5.0 wt. % of a phenolic biocide; from an amount effective to impart film-forming properties to the liquid biocidal composition up to 8 wt. % of a polyvinylpyrrolidone polymer or copolymer which is one of (A) a polyvinylpyrrolidone polymer with a degree of polymerization (K value) of from 15-90 or (B) a polyvinylpyrrolidone copolymer with vinyl acetate comprising 20-80 wt % polyvinylpyrrolidone; and an aqueous alcoholic solvent in which the phenolic biocide and the polyvinylpyrrolidone polymer or copolymer are dissolved; treating the solid surface with the liquid biocidal composition; and evaporating the aqueous alcoholic solvent to provide a clear film, wherein a ratio of the phenolic biocide to the polyvinylpyrrolidone polymer or copolymer is selected to range from 1:0.8 to 1:3 so that a complex there between is provided which dries clear.