Biostatic Polymer Formed Articles
AssigneeNovapham Research ( Australia) Pty Ltd
InventorSteven Kritzler
Life of this patent
Estimating the term…
Abstract
Compositions comprising a polyvinyl alcohol in combination with a biocide which is a plasticiser, such as a quaternary ammonium compound, or in combination with a biocide and a compatible plasticiser, and wherein the biocide forms a complex with the polyvinyl alcohol, said combination having been heated to above its melting point, said composition having a surface which remains biostatic or biocidal for at least 7 days. A hot melt of the composition may be cast or applied as a film or coating or may be extruded moulded or otherwise into articles. Volatiles formed during heating may be removed from the combination e.g. by low pressure.
Claims42
A composition comprising a polyvinyl alcohol in combination with a biocide which is a plasticizer, or in combination with a biocide and a compatible plasticiser, and wherein the biocide forms a complex with the polyvinyl alcohol, said combination having been heated to above its melting point, said composition having a surface which remains biostatic or biocidal for at least 7 days.
A method of forming a composition comprising the steps of combining a polyvinyl alcohol with a biocide which is a plasticiser, or with a biocide and a plasticiser, and wherein the biocide forms a complex with the polyvinyl alcohol, and heating the combination to above its melting point.
41-44. (canceled)
Dependencies are inferred from the claim text.