Biofilm growth prevention
AssigneeNovapharm Research (Australia) Pty Ltd
InventorSteven Kritzler
Life of this patent
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Abstract
A biostatic coating comprising a coating composition which on drying produces an intrinsically hydrophobic film. The coating composition includes a biocidal complex A-B in which A is a phenolic biocide and B is selected from polyvinylpyrrolidone (“PVP”), PVP polymers, PVP copolymers and mixtures thereof. The coating composition for example is selected from acrylic and methacrylic polymer based compositions, acrylic and methacrylic copolymer based compositions, vinyl polymer based compositions, vinyl copolymer based compositions, epoxy resins, epoxy esters, and mixtures thereof. Suitable biocides for use in the invention include, but are not limited to complexes of PVP or PVP copolymer with triclosan; diclosan; dichlorophen; orthophenylphenol; orthobenzylparachlorophenol, cresols, xylols, and substituted diphenyl ethers.
Claims49
A water-insoluble biostatic composition suitable for application to surfaces and effective to inhibit biofilm growth for at least 12 months when the surface is moist or wet, the composition comprising:
- a film forming combination of a biocidal complex A-B and a film forming water insoluble polymer wherein A of the biocidal complex A-B is a phenolic biocide and B of the biocidal complex A-B comprises a polyvinylpyrrolidone copolymer,
- wherein B is selected so that the biocidal complex A-B is not water-soluble but is dispersed in a water-based emulsion by inclusion of a polar solvent or is dispersed in a solvent based vehicle;
- and
- wherein the composition dries to a water-insoluble coating when applied to surfaces.
A biostatic coating formed by drying a film or thin layer of a biostatic coating composition on a surface,
- wherein the biostatic coating composition is suitable for application to surfaces and is effective to inhibit biofilm growth on the surface when the surface is moist or wet for at least 12 months;
- wherein the composition dries to a water insoluble coating effective to inhibit biofilm growth on the surface when applied to the surface;
- and
- wherein the composition comprises a film forming combination of a biocidal complex A-B and a film forming water insoluble polymer wherein A of the biocidal complex A-B is a phenolic biocide and B of the biocidal complex A-B comprises a polyvinylpyrrolidone copolymer, and wherein B is selected so that the biocidal complex A-B is not water soluble but is dispersed in a water based emulsion by inclusion of a polar solvent or is dispersed in a solvent based vehicle.
A method of inhibiting the formation of a biofilm on a surface susceptible to such formation when the surface is moist or wet, the method comprising the steps of:
- applying a coating of a biostatic composition to the surface;
- and
- drying the biostatic composition or allowing the composition to dry,
- wherein the biostatic composition of the coating comprises a film forming combination of a biocidal complex A-B and a film forming water insoluble polymer wherein A of the biocidal complex A-B is a phenolic biocide and B of the biocidal complex A-B comprises a polyvinylpyrrolidone copolymer, and wherein B is selected so that the biocidal complex A-B is not water soluble but is dispersed in a water based emulsion by inclusion of a polar solvent or is dispersed in a solvent based vehicle, and
- wherein the biostatic composition dries to a water insoluble coating effective to inhibit biofilm growth for at least 12 months on the surface.
Dependencies are inferred from the claim text.