METHODS FOR PROCESSING SUBSTRATES HAVING AN ANTIMICROBIAL COATING

• US 20090317435A1
• Filed: 06/20/2008
• Published: 12/24/2009
• Est. Priority Date: 06/20/2008
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: CARTER, Phillip W., KRONGAUZ, Vadim V., CAWTHON, Dustin C., VANDESTEEG, Nathan A., GREEN, John-Bruce D.
• Granted Patent: US 8,178,120 B2
• Time in Patent Office: Days
• US Class Current: 424/411
• CPC Class Codes: A01N 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 25/08 containing solids as carriers or diluents
• CPC Class Codes: A01N 25/34 Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
• CPC Class Codes: A01N 59/02 Sulfur; Selenium; Tellurium; Compounds thereof
• CPC Class Codes: A01N 59/08 Alkali metal chlorides; Alkaline earth metal chlorides
• CPC Class Codes: A01N 59/12 Iodine, e.g. iodophors; Compounds thereof
• CPC Class Codes: A01N 59/16 Heavy metals; Compounds thereof
• CPC Class Codes: A01N 59/20 Copper
• CPC Class Codes: A61K 2300/00 Mixtures or combinations of active ingredients, wherein at least one active ingredient is fully defined in groups A61K31/00 - A61K41/00
• CPC Class Codes: A61K 33/18 Iodine; Compounds thereof
• CPC Class Codes: A61K 33/24 Heavy metals; Compounds thereof
• CPC Class Codes: A61K 33/242 Gold; Compounds thereof
• CPC Class Codes: A61K 33/243 Platinum; Compounds thereof
• CPC Class Codes: A61K 33/244 Lanthanides; Compounds thereof medicinal preparations containing radioactive lanthanides for use in therapy or testing in vivo A61K51/00
• CPC Class Codes: A61K 33/30 Zinc; Compounds thereof
• CPC Class Codes: A61K 33/34 Copper; Compounds thereof
• CPC Class Codes: A61K 33/38 Silver; Compounds thereof
• CPC Class Codes: A61K 45/06 Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• CPC Class Codes: A61L 2300/102 Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
• CPC Class Codes: A61L 2300/104 Silver, e.g. silver sulfadiazine
• CPC Class Codes: A61L 2300/404 : Biocides, antimicrobial agents, antiseptic agents
• CPC Class Codes: A61L 2300/624 : Nanocapsules
• CPC Class Codes: A61L 2400/12 : Nanosized materials, e.g. nanofibres, nanoparticles, nanowires, nanotubes; Nanostructured surfaces
• CPC Class Codes: A61L 29/106 : Inorganic materials other than carbon
• CPC Class Codes: A61L 29/16 : Biologically active materials, e.g. therapeutic substances A61L29/048 takes precedence

Abstract

Methods for processing substrate surfaces carrying coatings comprising a metal are disclosed. The methods involve providing a substrate surface having a coating comprising a metal, and exposing the substrate surface to a mixture including an oxidizing agent and an anion.

Claims

1. A method for processing a substrate having a coating comprising a metal comprising:

providing a substrate surface having a coating comprising a metal, and exposing the substrate surface to a mixture comprising an oxidizing agent and an anion.

2. The method of claim 1, wherein the substrate surface comprises at least one plastic, glass, metal, ceramic, elastomer, or mixtures or laminates thereof.

3. The method of claim 1, wherein the substrate surface comprises a plastic or elastomer selected from the group consisting of:

acrylonitrile butadiene styrenes, polyacrylonitriles, polyamides, polycarbonates, polyesters, polyetheretherketones, polyetherimides, polyethylenes, polyethylene terephthalates, polylactic acids, polymethyl methyacrylates, polypropylenes, polystyrenes, polyurethanes, poly(vinyl chlorides), polyvinylidene chlorides, polyethers, polysulfones, silicones, natural rubbers, synthetic rubbers, styrene butadiene rubbers, ethylene propylene diene monomer rubbers, polychloroprene rubbers, acrylonitrile butadiene rubbers, chlorosulfonated polyethylene rubbers, polyisoprene rubbers, isobutylene-isoprene copolymeric rubbers, chlorinated isobutylene-isoprene copolymeric rubbers, brominated isobutylene-isoprene copolymeric rubbers, and blends and copolymers thereof.

4. The method of claim 1, wherein the substrate surface comprises a surface of a medical device or medical device component.

5. The method of claim 1, wherein the substrate surface comprises a surface of a medical fluid container or medical fluid flow system.

6. The method of claim 1, wherein the substrate surface comprises a surface of an I.V. set.

7. The method of claim 1, wherein the substrate surface comprises a surface of a medical device or medical device component selected from the group consisting of:

I.V. tubing, I.V. fluid bags, access devices for I.V. sets, septa, stopcocks, I.V. set connectors, I.V. set adaptors, clamps, I.V. filters, catheters, needles, and cannulae.

8. The method of claim 1, wherein the substrate surface comprises a surface of a luer access device or a needleless luer access device.

9. The method of claim 1, wherein the substrate surface comprises an antimicrobial metal coating.

10. The method of claim 1, wherein the metal comprises silver, copper, gold, zinc, cerium, platinum, palladium, tin, or mixtures thereof.

11. The method of claim 1, wherein the metal comprises silver.

12. The method of claim 1, wherein the metal comprises metallic nanoparticles.

13. The method of claim 12, wherein the metallic nanoparticles have an initial diameter of about 1 nm to about 1000 nanometers.

14. The method of claim 1, wherein the exposing occurs for about 0.1 seconds to about 24 hours.

15. The method of claim 1, wherein the exposing occurs for about 0.1 seconds to about 2 hours.

16. The method of claim 1, wherein the oxidizing agent is selected from the group consisting of:

metal ions, metal compounds, halogens, halogen-containing compounds, organic compounds of oxygen, inorganic compounds of oxygen, and mixtures thereof.

17. The method of claim 1, wherein the oxidizing agent is selected from the group consisting of:

Fe³⁺, Fe²⁺, Cu²⁺, Cu⁺, MnO₄⁻

, Ce⁴⁺, IO₃⁻

, I₃⁻

, I₂, BrO₃⁻

, Br₂, Br₃⁻

, ClO₃⁻

, Cl₂, NO₃⁻

, O₂, S₂O₈²⁻

, H₂O₂, quinones, fumarate, methylene blue, and mixtures thereof.

18. The method of claim 1, wherein the anion is selected from the group consisting of:

organic oxyanions, inorganic oxyanions, halides, nitrogen anions, and mixtures thereof.

19. The method of claim 1, wherein the anion is selected from the group consisting of:

acetate, hydroxide, carbonate, oxalate, phosphates, pyrophosphates, phosphonates, phospholipids, sulfates, sulfonates, fluoride, chloride, bromide, iodide, chlorate, bromate, iodate, citrate, deoxycholate, stearate, succinate, sulfadiazine anion, carboxymethylcellulose, alginic acid, amides, cyanate, cyanide, and mixture thereof.

20. The method of claim 1, wherein the oxidizing agent and the anion are the same.

21. The method of claim 1, wherein the exposing comprises exposing the substrate surface to povidone iodine.

22. The method of claim 1, wherein the exposing comprises exposing the substrate surface to more than one mixture comprising an oxidizing agent and an anion.

23. The method of claim 1, wherein the coating prior to said exposing has a first metal content, the coating after said exposing has a second metal content, and the second metal content is at least 5% of the first metal content.

24. The method of claim 1, wherein the coating prior to said exposing has a first metal content, the coating after said exposing has a second metal content, and the second metal content is at least 10% of the first metal content.

25. The method of claim 1, wherein the coating prior to said exposing has a first metal content, the coating after said exposing has a second metal content, and the second metal content is at least 20% of the first metal content.

26. The method of claim 1, wherein the coating prior to said exposing has a first metal content, the coating after said exposing has a second metal content, and the second metal content is at least 40% of the first metal content.

27. The method of claim 1, wherein the coating prior to said exposing has a first anion content, the coating after said exposing has a second anion content, and the second anion content is increased compared to the first anion content.

28. The method of claim 1, wherein the mixture further comprises a polymeric additive.

29. The method of claim 28, wherein the polymeric additive comprises polyvinyl pyrrolidone.