Biocidal fibrous and film materials comprising silver and chlorite ions
First Claim
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1. A composition comprising:
- (a) a hydrophilic polymer comprising a polyvinylpyridine hydrophilic polymer and a chlorite anion;
(b) a hydrophobic polymer comprising carboxylate substituted hydrophobic polymer; and
(c) a silver ion present at a level of 0.01% to 9.9% by weight,wherein the silver ion is associated with a pyridine group of said polyvinylpyridine hydrophilic polymer and a negatively charged carboyxlate group of said carboxylate substituted hydrophobic polymer so as to form a molecular bridge between the hydrophilic polymer and the hydrophobic polymer; and
wherein said chlorite anion oxidizes any silver metal formed from said silver ion to inhibit formation of silver metal clusters.
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Abstract
Disclosed are compositions comprising a hydrophilic polymer, a hydrophobic polymer, a silver ion, and a chlorite anion, wherein the silver ion associates with at least one hydrophilic or hydrophobic polymer, and wherein the chlorite ion associates with the hydrophilic polymer. Also disclosed are methods of making a photo-stable silver ion and chlorite ion containing wound dressing and methods of reducing or preventing infection of a wound by using the compositions and wound dressings of the present invention.
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Citations
27 Claims
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1. A composition comprising:
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(a) a hydrophilic polymer comprising a polyvinylpyridine hydrophilic polymer and a chlorite anion; (b) a hydrophobic polymer comprising carboxylate substituted hydrophobic polymer; and (c) a silver ion present at a level of 0.01% to 9.9% by weight, wherein the silver ion is associated with a pyridine group of said polyvinylpyridine hydrophilic polymer and a negatively charged carboyxlate group of said carboxylate substituted hydrophobic polymer so as to form a molecular bridge between the hydrophilic polymer and the hydrophobic polymer; and
wherein said chlorite anion oxidizes any silver metal formed from said silver ion to inhibit formation of silver metal clusters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification