CA2678624A1 - Deposition products, composite materials and processes for the production thereof - Google Patents

Deposition products, composite materials and processes for the production thereof Download PDF

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Publication number
CA2678624A1
CA2678624A1 CA002678624A CA2678624A CA2678624A1 CA 2678624 A1 CA2678624 A1 CA 2678624A1 CA 002678624 A CA002678624 A CA 002678624A CA 2678624 A CA2678624 A CA 2678624A CA 2678624 A1 CA2678624 A1 CA 2678624A1
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comprised
deposition
silver
deposition product
substrate
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CA002678624A
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French (fr)
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CA2678624C (en
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Stojan Djokic
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Exciton Technologies Inc
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Priority claimed from CA002428922A external-priority patent/CA2428922A1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L17/00—Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters
    • A61L17/005—Materials for surgical sutures or for ligaturing blood vessels ; Materials for prostheses or catheters containing a biologically active substance, e.g. a medicament or a biocide
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/54—Biologically active materials, e.g. therapeutic substances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/14—Materials characterised by their function or physical properties, e.g. lubricating compositions
    • A61L29/16—Biologically active materials, e.g. therapeutic substances
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L31/16—Biologically active materials, e.g. therapeutic substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1646—Characteristics of the product obtained
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/42—Coating with noble metals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/10—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing inorganic materials
    • A61L2300/102—Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
    • A61L2300/104—Silver, e.g. silver sulfadiazine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
    • A61L2300/404—Biocides, antimicrobial agents, antiseptic agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/294—Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2942—Plural coatings
    • Y10T428/2949—Glass, ceramic or metal oxide in coating

Abstract

Methods for the production of deposition products including an oxidized metal species under acidic conditions, methods for the production of composite materials including a substrate and the deposition product, and products in the nature of deposition products and composite materials. The methods are particularly suited for depositing a very thin layer of a deposition product on a substrate and may be used to produce composite materials for use in many applications, including but not limited to electronics, materials engineering and medical applications. In a preferred embodiment, the metal is silver, the substrates are medical devices or components of medical devices and the deposition product includes an antimicrobially active oxidized silver species.

Claims (100)

1. A method for producing a deposition product, wherein the deposition product is comprised of at least one oxidized species of a metal, the method comprising the following steps:

(a) providing a deposition solution comprising an amount of ions of the metal and an amount of an oxidizing agent; and (b) producing the deposition product by facilitating a chemical reaction in the deposition solution between the ions of the metal and the oxidizing agent.
2. The method as claimed in claim 1 wherein the metal is comprised of silver and wherein the ions of the metal are comprised of silver ions.
3. The method as claimed in claim 2 wherein the deposition solution is comprised of an aqueous solution of a silver salt.
4. The method as claimed in claim 3 wherein the silver salt is comprised of silver nitrate.
5. The method as claimed in claim 3 wherein the oxidizing agent is selected from the group of oxidizing agents consisting of persulfates, permanganates, peroxides, hypochlorites and mixtures thereof.
6. The method as claimed in claim 5 wherein the oxidizing agent is comprised of a persulfate.
7. The method as claimed in claim 6 wherein the persulfate is selected from the group of persulfates consisting of potassium persulfate, sodium persulfate, ammonium persulfate and mixtures thereof.
8. The method as claimed in claim 7 wherein the persulfate is comprised of potassium persulfate.
9. The method as claimed in claim 6 wherein the amount of the oxidizing agent is selected to be a stoichiometrically appropriate amount relative to the amount of the ions of the metal.
10. The method as claimed in claim 7 wherein the amount of the silver ions is selected so that a concentration of the silver salt in the deposition solution is between about 1 gram per liter and about 20 grams per liter.
11. The method as claimed in claim 10 wherein the amount of the oxidizing agent is selected so that a concentration of the oxidizing agent in the deposition solution is between about 1 gram per liter and about 50 grams per liter.
12. The method as claimed in claim 7, further comprising the step of adding an amount of a source of anions to the deposition solution for combining with the ions of the metal in order to produce the deposition product.
13. The method as claimed in claim 12 wherein the source of anions is comprised of at least one acid.
14. The method as claimed in claim 13 wherein the acid is selected from the group of acids consisting of carbonic acid, nitric acid, perchloric acid, sulfuric acid, acetic acid, fluoroboric acid, citric acid, acetylsalicylic acid and mixtures thereof.
15. The method as claimed in claim 12 wherein the amount of the source of anions is selected to be a stoichiometrically appropriate amount relative to the amount of the ions of the metal.
16. The method as claimed in claim 7 wherein the deposition product producing step is comprised of maintaining the deposition solution at a temperature of between about 2 degrees Celsius and about 60 degrees Celsius.
17. The method as claimed in claim 7 wherein the deposition product producing step is comprised of maintaining the deposition solution at a temperature of between about 2 degrees Celsius and about 40 degrees Celsius.
18. The method as claimed in claim 7 wherein the deposition product producing step is comprised of maintaining the deposition solution at a temperature of between about 10 degrees Celsius and about 25 degrees Celsius.
19. The method as claimed in claim 7 wherein the deposition product producing step is comprised of agitating the deposition solution during at least a portion of the deposition product producing step.
20. The method as claimed in claim 7, further comprising the following steps:
(a) providing a substrate; and (b) contacting the substrate with the deposition solution during the deposition product producing step, thereby producing a composite material comprising the substrate and the deposition product.
21. The method as claimed in claim 20 wherein the silver salt is comprised of silver nitrate.
22. The method as claimed in claim 21 wherein the persulfate is selected from the group of persulfates consisting of potassium persulfate, ammonium persulfate and mixtures thereof.
23. The method as claimed in claim 22 wherein the substrate is a medical device.
24. The method as claimed in claim 23 wherein the amount of the silver ions is selected so that a concentration of the silver nitrate in the deposition solution is between about I
gram per liter and about 20 grams per liter.
25. The method as claimed in claim 24 wherein the amount of the oxidizing agent is selected so that a concentration of the oxidizing agent in the deposition solution is between about 1 gram per liter and about 50 grams per liter.
26. A method for producing a composite material comprising a substrate and a deposition product, the method comprising the following steps:

(a) providing a deposition solution comprising an amount of an aqueous solution of a silver salt comprised of an amount of silver ions and an amount of an oxidizing agent, wherein the silver salt is comprised of silver nitrate, wherein the oxidizing agent is comprised of a persulfate, wherein a concentration of the silver salt in the deposition solution is between about 1 gram per liter and about 20 grams per liter, wherein a concentration of the oxidizing agent in the deposition solution is between about 1 gram per liter and about 50 grams per liter, and wherein the deposition solution has a pH below 7;

(b) producing the deposition product by facilitating a chemical reaction in the deposition solution between the silver ions and the oxidizing agent while maintaining the deposition solution at a temperature of between about 2 degrees Celsius and about 40 degrees Celsius, wherein the deposition product consists essentially of at least one oxidized silver species, and wherein the deposition product is comprised of a compound having the formula Ag7O8X, where X is an anion;

(c) providing the substrate, wherein the substrate is a medical device; and (d) contacting the substrate with the deposition solution during the deposition product producing step (b), thereby producing the composite material.
27. The method as claimed in claim 26 wherein the persulfate is selected from the group of persulfates consisting of potassium persulfate, sodium persulfate, ammonium persulfate and mixtures thereof.
28. The method as claimed in claim 27 wherein the persulfate is comprised of potassium persulfate.
29. The method as claimed in claim 26 wherein the amount of the oxidizing agent is selected to be a stoichiometrically appropriate amount relative to the amount of the silver ions.
30. The method as claimed in claim 27, further comprising the step of adding an amount of a source of anions to the deposition solution for combining with the silver ions in order to produce the deposition product.
31. The method as claimed in claim 30 wherein the source of anions is comprised of at least one acid.
32. The method as claimed in claim 31 wherein the acid is selected from the group of acids consisting of carbonic acid, nitric acid, perchloric acid, sulfuric acid, acetic acid, fluoroboric acid, citric acid, acetylsalicylic acid and mixtures thereof.
33. The method as claimed in claim 30 wherein the amount of the source of anions is selected to be a stoichiometrically appropriate amount relative to the amount of the silver ions.
34. The method as claimed in claim 27 wherein the deposition product producing step is comprised of maintaining the deposition solution at a temperature of between about 10 degrees Celsius and about 25 degrees Celsius.
35. The method as claimed in claim 27 wherein the deposition product producing step is comprised of agitating the deposition solution during at least a portion of the deposition product producing step.
36. The method as claimed in claim 20 or 26 wherein the substrate contacting step is performed for at least about 1 minute.
37. The method as claimed in claim 36 wherein the substrate contacting step is performed for between about 1 minute and about 60 minutes.
38. The method as claimed in claim 37 wherein the substrate contacting step is performed for between about 1 minute and about 20 minutes.
39. The method as claimed in claim 38 wherein the substrate contacting step is performed for between about 2 minutes and about 10 minutes.
40. The method as claimed in claim 20 or 26, further comprising the step, following the substrate contacting step, of washing the composite material.
41. The method as claimed in claim 20 or 26, further comprising the step, prior to the substrate contacting step, of etching the substrate by immersing the substrate in an etching solution.
42. The method as claimed in claim 41 wherein the etching solution is comprised of a mixture of an alcohol and an aqueous solution of a hydroxide compound.
43. The method as claimed in claim 42 wherein the hydroxide compound is selected from the group of hydroxide compounds consisting of sodium hydroxide, potassium hydroxide and mixtures thereof.
44. The method as claimed in claim 42 wherein the hydroxide compound is comprised of sodium hydroxide.
45. The method as claimed in claim 42 wherein the etching step is performed for between about 5 minutes and about 20 minutes.
46. The method as claimed in claim 42, further comprising the step, following the etching step, of washing the substrate to remove residual alkali from the substrate.
47. The method as claimed in claim 20 or 26, further comprising the step, following the substrate contacting step, of immersing the composite material in boiling water.
48. The method as claimed in claim 47 wherein the immersing step is performed for at least about 1 minute.
49. The method as claimed in claim 23 or 26 wherein the substrate is comprised of a wound dressing.
50. The method as claimed in claim 49 wherein the substrate is comprised of a high density polyethylene material.
51. The method as claimed in claim 50 wherein the substrate is comprised of a skin adhesive layer, wherein the skin adhesive layer is comprised of a cross-linked silicon gel, and wherein the deposition product is deposited on the skin adhesive layer.
52. The method as claimed in claim 51 wherein the skin adhesive layer has adhesive properties and wherein the deposition product does not materially interfere with the adhesive properties of the skin adhesive layer.
53. A method for producing a deposition product, the method comprising the following steps:

(a) providing a deposition solution comprising an amount of an aqueous solution of a silver salt comprised of an amount of silver ions and an amount of an oxidizing agent, wherein the silver salt is comprised of silver nitrate, wherein the oxidizing agent is comprised of a persulfate, wherein a concentration of the silver salt in the deposition solution is between about 1 gram per liter and about 20 grams per liter, wherein a concentration of the oxidizing agent in the deposition solution is between about 1 gram per liter and about 50 grams per liter, and wherein the deposition solution has a pH below 7; and (b) producing the deposition product by facilitating a chemical reaction in the deposition solution between the silver ions and the oxidizing agent while maintaining the deposition solution at a temperature of between about 2 degrees Celsius and about 40 degrees Celsius, wherein the deposition product consists essentially of at least one oxidized silver species, and wherein the deposition product is comprised of a compound having the formula Ag7O8X, where X is an anion.
54. The method as claimed in claim 53 wherein the persulfate is selected from the group of persulfates consisting of potassium persulfate, sodium persulfate, ammonium persulfate and mixtures thereof.
55. The method as claimed in claim 54 wherein the persulfate is comprised of potassium persulfate.
56. The method as claimed in claim 53 wherein the amount of the oxidizing agent is selected to be a stoichiometrically appropriate amount relative to the amount of the silver ions.
57. The method as claimed in claim 54, further comprising the step of adding an amount of a source of anions to the deposition solution for combining with the silver ions in order to produce the deposition product.
58. The method as claimed in claim 57 wherein the source of anions is comprised of at least one acid.
59. The method as claimed in claim 58 wherein the acid is selected from the group of acids consisting of carbonic acid, nitric acid, perchloric acid, sulfuric acid, acetic acid, fluoroboric acid, citric acid, acetylsalicylic acid and mixtures thereof.
60. The method as claimed in claim 57 wherein the amount of the source of anions is selected to be a stoichiometrically appropriate amount relative to the amount of the silver ions.
61. The method as claimed in claim 54 wherein the deposition product producing step is comprised of maintaining the deposition solution at a temperature of between about 10 degrees Celsius and about 25 degrees Celsius.
62. The method as claimed in claim 54 wherein the deposition product producing step is comprised of agitating the deposition solution during at least a portion of the deposition product producing step.
63. The method as claimed in claim 26 or 53 wherein the deposition product is further comprised of Ag2SO4.
64. The method as claimed in claim 26 or 53 wherein the deposition product is further comprised of at least one silver oxide selected from the group of silver oxides consisting of monovalent silver oxide, bivalent silver oxide, trivalent silver oxide and mixtures thereof.
65. The method as claimed in claim 26 or 53 wherein X is derived from an acid.
66. The method as claimed in claim 26 or 53 wherein the deposition product is comprised of a plurality of valent states of silver.
67. The method as claimed in claim 26 or 53 wherein X is selected from the group of anions consisting of HCO3-, CO3 2-, NO3-, ClO4-, SO4 2-, F-, and mixtures thereof.
68. The method as claimed in claim 67 wherein X is comprised of NO3-.
69. A medical device comprising a composite material, wherein the composite material is comprised of a substrate and a deposition product and wherein the deposition product is comprised of an antimicrobially active oxidized silver species comprising a silver salt and a silver oxide.
70. The medical device as claimed in claim 69 wherein the medical device is comprised of a wound dressing.
71. The medical device as claimed in claim 70 wherein the substrate is comprised of a high density polyethylene material.
72. The medical device as claimed in claim 70 wherein the substrate is comprised of a cross-linked silicon gel.
73. The medical device as claimed in claim 70 wherein the substrate is comprised of a skin adhesive layer, wherein the skin adhesive layer is comprised of a cross-linked silicon gel, and wherein the deposition product is deposited on the skin adhesive layer.
74. The medical device as claimed in claim 73 wherein the skin adhesive layer has adhesive properties and wherein the deposition product does not materially interfere with the adhesive properties of the skin adhesive layer.
75. The medical device as claimed in any one of claims 69 to 74 wherein the oxidized silver species is comprised of a compound having the general formula Ag7OBX, where X is an anion.
76. The medical device as claimed in claim 75 wherein the oxidized silver species is further comprised of Ag2SO4.
77. The medical device as claimed in claim 75 wherein the oxidized silver species is further comprised of at least one silver oxide selected from the group of silver oxides consisting of monovalent silver oxide, bivalent silver oxide, trivalent silver oxide and mixtures thereof.
78. The medical device as claimed in claim 75 wherein X is derived from an acid.
79. The medical device as claimed in claim 75 wherein the oxidized silver species is comprised of a plurality of valent states of silver.
80. The medical device as claimed in claim 75 wherein X is selected from the group of anions consisting of HCO3-, CO3 2-, NO3-, ClO4-, SO4 2-, F-, and mixtures thereof.
81. The medical device as claimed in claim 80 wherein X is comprised of NO3-.
82. A composite material comprising a substrate and a deposition product, wherein the substrate is a medical device, and wherein the deposition product consists essentially of at least one oxidized silver species, and wherein the deposition product is comprised of a compound having the formula Ag7O8X, where X is an anion.
83. The composite material as claimed in claim 82 wherein the medical device is comprised of a wound dressing.
84. The composite material as claimed in claim 83 wherein the medical device is comprised of a high density polyethylene material.
85. The composite material as claimed in claim 83 wherein the medical device is comprised of a cross-linked silicon gel.
86. The composite material as claimed in claim 83 wherein the medical device is comprised of a skin adhesive layer, wherein the skin adhesive layer is comprised of a cross-linked silicon gel, and wherein the deposition product is deposited on the skin adhesive layer.
87. The composite material as claimed in claim 86 wherein the skin adhesive layer has adhesive properties and wherein the deposition product does not materially interfere with the adhesive properties of the skin adhesive layer.
88. The composite material as claimed in any one of claims 82 to 87 wherein the deposition product is further comprised of Ag2SO4.
89. The composite material as claimed in any one of claims 82 to 87 wherein the deposition product is further comprised of at least one silver oxide selected from the group of silver oxides consisting of monovalent silver oxide, bivalent silver oxide, trivalent silver oxide and mixtures thereof.
90. The composite material as claimed in any one of claims 82 to 87 wherein X
is derived from an acid.
91. The composite material as claimed in any one of claims 82 to 87 wherein the deposition product is comprised of a plurality of oxidized silver species having a plurality of valent states of silver.
92. The composite material as claimed in any one of claims 82 to 87 wherein X
is selected from the group of anions consisting of HCO3-, CO3 2-, NO3-, ClO4 , SO4 2-, F-, and mixtures thereof.
93. The composite material as claimed in claim 92 wherein X is comprised of NO3-.
94. The use of a deposition product for providing an antimicrobial effect, the deposition product consisting essentially of at least one oxidized silver species, and wherein the deposition product is comprised of a compound having the formula Ag7O8X, where X is an anion.
95. The use as claimed in claim 94 wherein the deposition product is further comprised of Ag2SO4.
96. The use as claimed in claim 94 wherein the deposition product is further comprised of at least one silver oxide selected from the group of silver oxides consisting of monovalent silver oxide, bivalent silver oxide, trivalent silver oxide and mixtures thereof.
97. The use as claimed in claim 94 wherein X is derived from an acid.
98. The use as claimed in claim 94 wherein the deposition product is comprised of a plurality of oxidized silver species having a plurality of valent states of silver.
99. The use as claimed in claim 94 wherein X is selected from the group of anions consisting of HCO3-, CO3 2-, NO3-, ClO4-, SO4 2-, F-, and mixtures thereof.
100. The use as claimed in claim 99 wherein X is comprised of NO3-.
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US20080075650A1 (en) 2008-03-27
US7687076B2 (en) 2010-03-30
US7300673B2 (en) 2007-11-27
WO2004101014A2 (en) 2004-11-25
WO2004101014A3 (en) 2005-07-07
US20040229034A1 (en) 2004-11-18
US20080233161A1 (en) 2008-09-25
US20080075860A1 (en) 2008-03-27
US7998504B2 (en) 2011-08-16
CA2678624C (en) 2012-11-06

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