Silver coatings and methods of manufacture
First Claim
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1. A method of making an antimicrobial wound dressing, the method comprising:
- preparing a composition comprising silver sulfate and water;
wherein any stabilizing agent is present in an amount less than 50 ppm based on the total weight of the silver sulfate composition;
coating the silver sulfate composition on a cellulosic substrate;
drying the coated substrate at a temperature of 125°
C. to 190°
C., such that the coated substrate darkens in proportion to the temperature, turning to a yellow color, a brown color, or a dark brown color;
wherein after drying, the composition includes less than 20 wt % silver metal, based on the total weight of silver components in the composition; and
maintaining the dried silver sulfate coated substrate at a relative humidity of no more than 50%;
wherein the dry antimicrobial wound dressing is color stable.
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Abstract
A silver composition comprising silver sulfate and a method of coating the composition on a substrate is disclosed.
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Citations
28 Claims
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1. A method of making an antimicrobial wound dressing, the method comprising:
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preparing a composition comprising silver sulfate and water;
wherein any stabilizing agent is present in an amount less than 50 ppm based on the total weight of the silver sulfate composition;coating the silver sulfate composition on a cellulosic substrate; drying the coated substrate at a temperature of 125°
C. to 190°
C., such that the coated substrate darkens in proportion to the temperature, turning to a yellow color, a brown color, or a dark brown color;wherein after drying, the composition includes less than 20 wt % silver metal, based on the total weight of silver components in the composition; and maintaining the dried silver sulfate coated substrate at a relative humidity of no more than 50%; wherein the dry antimicrobial wound dressing is color stable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 26, 27, 28)
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11. A method of making an antimicrobial wound dressing, the method comprising:
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preparing a composition comprising silver sulfate and water;
wherein any stabilizing agent is present in an amount less than 50 ppm based on the total weight of the silver sulfate compositioncoating the silver sulfate composition on a cellulosic substrate; drying the coated substrate at a temperature of 125°
C. to 190°
C. such that the coated substrate changes color to a color is selected from the group consisting of yellow, gold, tan, and brown;
wherein the dried composition includes less than 20 wt % silver metal, based on the total weight of silver components in the composition;wherein the dry antimicrobial wound dressing is color stable. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification