Sustained release, transparent biocidal compositions
AssigneeBernard Technologies, Inc.
InventorsStephen T. Wellinghoff, Joel J. Kampa, Sumner A. Barenberg, Peter N. Gray
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Abstract
A composition for retarding bacterial, fungal and viral contamination and mold growth containing an acid releasing polymer, a hydrophilic material, and chlorite anions. Each component of the composition has a particle size of not more than about 1,000 angstroms. The composition is substantially free of water and capable of releasing chlorine dioxide upon hydrolysis of the acid releasing polymer.
Claims59
A composition for retarding bacterial, fungal and viral contamination and mold growth comprising an acid releasing polymer, a hydrophilic material, and chlorite anions, each component of the composition having a particle size of not more than about 1,000 angstroms, and the composition being substantially free of water and capable of releasing chlorine dioxide upon hydrolysis of the acid releasing polymer.
A composition for retarding bacterial, fungal and viral contamination and mold growth comprising an amide, chlorite anions, and an acid releasing terpolymer formed from polyvinylpyrrolidone, lactic acid and glycolic acid, each component of the composition having a particle size of not more than about 1,000 angstroms, and the composition being substantially free of water and capable of releasing chlorine dioxide upon hydrolysis of the acid releasing polymer.
A multilayered composite for providing sustained release of chlorine dioxide comprising:
- a water-soluble layer comprising an acid releasing polymer, a hydrophilic material and chlorite anions, the layer being substantially free of water and each component of the layer having a particle size of not more than about 1,000 angstroms;
- and
- an upper moisture regulating layer in contact with an upper surface of the water-soluble layer, and a lower moisture regulating layer in contact with a lower surface of the water-soluble layer, the moisture regulating layers being water insoluble, such that moisture permeating either of the moisture regulating layers hydrolyzes the acid releasing polymer to initiate release of chlorine dioxide from the multilayered composite.
A multilayered composite for providing time pulsed release of chlorine dioxide comprising:
- at least two water-soluble layers comprising an acid releasing polymer, a hydrophilic material and chlorite anions, the layers being substantially free of water and each component of the layers having a particle size of not more than about 1,000 angstroms;
- and
- at least three water-insoluble, water-permeable barrier layers to control the diffusion of water or the diffusion of hydronium ions produced by hydrolysis of the acid releasing polymer into the water-soluble layer;
- the arrangement of the layers in the composite being defined by the formula C(ACA).sub.n C wherein C is a barrier layer, A is a water-soluble layer, and n is an integer ranging from 1 to 10.
A process for preparing a composition comprising:
- mixing a hydrophilic material, a chlorite salt, an acid releasing polymer and an organic solvent to form a mixture in which each component has a particle size of not more than about 1,000 angstroms, the mixture being substantially free of water and capable of releasing chlorine dioxide upon hydrolysis of the acid releasing polymer.
A process for preparing a composition comprising:
- mixing an amine and an acid releasing polymer to form a mixture;
- and
- exposing the mixture to chlorine dioxide that reacts with the amine to form iminium chlorite within the mixture, the mixture having a particle size of not more than about 1,000 angstroms and being capable of releasing chlorine dioxide upon hydrolysis of the acid releasing polymer.
Dependencies are inferred from the claim text.