GB2468704A - Anti-microbial copper or brass surfaces - Google Patents
Anti-microbial copper or brass surfaces Download PDFInfo
- Publication number
- GB2468704A GB2468704A GB0904731A GB0904731A GB2468704A GB 2468704 A GB2468704 A GB 2468704A GB 0904731 A GB0904731 A GB 0904731A GB 0904731 A GB0904731 A GB 0904731A GB 2468704 A GB2468704 A GB 2468704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- component
- copper
- brass
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000010949 copper Substances 0.000 title claims abstract description 18
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 18
- 229910001369 Brass Inorganic materials 0.000 title claims abstract description 16
- 239000010951 brass Substances 0.000 title claims abstract description 16
- 230000000845 anti-microbial effect Effects 0.000 title claims abstract description 10
- 239000004599 antimicrobial Substances 0.000 title claims description 4
- 239000002253 acid Substances 0.000 claims abstract description 17
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000001680 brushing effect Effects 0.000 claims abstract description 7
- 238000007654 immersion Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 241001311547 Patina Species 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004202 carbamide Substances 0.000 claims abstract description 4
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 4
- 229940016373 potassium polysulfide Drugs 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims 9
- 241000894006 Bacteria Species 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 241000228245 Aspergillus niger Species 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 241000588724 Escherichia coli Species 0.000 description 2
- 241000589248 Legionella Species 0.000 description 2
- 208000007764 Legionnaires' Disease Diseases 0.000 description 2
- 241000186779 Listeria monocytogenes Species 0.000 description 2
- RJQXTJLFIWVMTO-TYNCELHUSA-N Methicillin Chemical compound COC1=CC=CC(OC)=C1C(=O)N[C@@H]1C(=O)N2[C@@H](C(O)=O)C(C)(C)S[C@@H]21 RJQXTJLFIWVMTO-TYNCELHUSA-N 0.000 description 2
- 241000589516 Pseudomonas Species 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229960003085 meticillin Drugs 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
-
- 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
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/23—Solid substances, e.g. granules, powders, blocks, tablets
- A61L2/232—Solid substances, e.g. granules, powders, blocks, tablets layered or coated
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/52—Treatment of copper or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Epidemiology (AREA)
- Mechanical Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
A process for preparing a copper or brass surface for use in a fitting comprises the steps of applying an acid to the surface, terminating the reaction once an artificial oxide layer or patina has been created and neutralising the surface by washing with water. The acid may be a solution containing potassium polysulfide, ferric nitrate, cupric nitrate or urea. Preferably, the acid and water are applied by immersion, brushing or spraying. The copper or brass surface may be immersed in a heated tank containing an acid solution. The use of an artificially patinated copper or brass surface to manufacture a component having anti-microbial properties is also disclosed. The component is for use in furniture, medical applications, food preparation or for domestic or kitchen use.
Description
Description 1
ANTI-MICROBIAL SURFACES
Technical Field
[0001] The present application relates to materials for surfaces in furniture and fittings for medical applications, commercial catering and I or food preparation, as well as for domestic and kitchen use.
Background Art
[0002] Bacteria including Escherichia coli, Listeria monocytogenes, MRSA (methicillin resistant staphylococus aureus), Enterobachter aerogenes, legionella, aspergillus niger, and pseudomonas aeroginosa can easily contaminate surfaces in our environment. These microbes are transferred by contact or can be deposited on surfaces from the air.
[0003] Copper and brass are known to have anti-microbial properties. Bacteria have been demonstrated to die when present on copper and brass surfaces, including oxidised or patinated surfaces. In the USA some copper alloys have been approved by the Environmental Protection Agency as capable of supporting the claim that they kill kills 99.9% of bacteria within two hours. See FEDER, Barnaby J. Regulators Stamp Copper as a Germ Killer. New York Times. 26 March 2008.
Technical Problem [0004] However, copper and brass tarnish readily, and, in the initial stages of natural oxidation have a very unattractive appearance.
[0005] Artificial patination of copper bearing material after the material is installed in a building construction is described, for example in EP 0742291 A (OUTOKUMPU COPPER OY) 13/11/1996.
Technical Solution [0006] In order to produce a surface suitable for immediate use, the present invention provides a process for preparing the surface. The treated surface combines the anti-microbial effect with a decorative finish.
[0007] The present invention provides a process for preparing a copper or brass surface of a component for use in a fitting, comprising the steps of (a) applying an acid to the surface of the component; (b) terminating the reaction when an artificial oxide layer or patina has been created and; (c) neutralising the surface by washing with water.
Advantageous Effects of the Invention [0008] The evidence is that copper and brass retain their anti-microbial properties with a tarnished surface. See MICHELS, H.T. , et al. Copper Alloys for Human Infectious Disease Control. Materials Science and Technology Conference. September 2005, vol. 1.
Mode(s) for Carrying Out the Invention [0009] The artificial oxide layer or patina with decorative properties is created on the surface of a component prior to its incorporation into a fitting by applying an acid to the surface of the component to be patinated. The acid can be applied by immersion, brushing or spraying. The reaction is terminated, and the copper or brass component rendered neutral by washing in water. The water is applied by immersion, brushing or spraying.
[0010] Acids that can be used include solutions of potassium polysulfide, ferric nitrate, cupric nitrate and urea, to achieve different decorative finishes.
[0011] Patination is accelerated by heat, either by heating the component or by heating the acid solution, especially in the case of components being immersed in a tank.
[0012] Copper and brass components with artificially induced patinas will kill bacteria present on their surfaces. Bacteria that will be killed include Escherichia coli, Listeria monocytogenes, MRSA (methicillin resistant staphylococus aureus, Enterobachter aerogenes, legionella, aspergillus niger, and pseudomonas aeroginosa.
Claims (7)
- Claims 3 1. A process for preparing a copper or brass surface of a component for use in a fitting, comprising the steps of (a) applying an acid to the surface of the component; (b) terminating the reaction when an artificial oxide layer or patina has been created and; (c) neutralising the surface by washing with water.
- 2. A process as claimed in any one of the preceding claims, wherein the acid is a solution of potassium polysulfide, ferric nitrate, cupric nitrate or urea.
- 3. A process as claimed in claim 1, wherein the acid is applied by immersion, brushing or spraying.
- 4. A process as claimed in claim 1 or 2, wherein the water is applied by immersion, brushing or spraying.
- 5. A process as claimed in claim 1 or 2, wherein the component is immersed in a heated tank containing an acid solution.
- 6. Use of an artificially patinated copper or brass surface to manufacture a component having anti-microbial properties for use in furniture and fittings for medical applications, commercial catering and I or food preparation, or for domestic or kitchen use.Amendment to the claims have been filed as follows 1. A process when used for preparing a copper or brass surface which has anti-microbial and decorative properties of a component for use in a fitting, comprising the steps of (a) applying an acid to the surface of the component; (b) terminating the reaction when an artificial oxide layer or patina has been created and; (c) neutralising the surface by washing with water.2. A process as claimed in any one of the preceding claims, wherein the acid is a solution of potassium polysulfide, ferric nitrate, cupric nitrate or urea.3. A process as claimed in claim 1, wherein the acid is applied by immersion, brushing or spraying.4. A process as claimed in claim 1 or 2, wherein the water is applied by immersion, brushing or spraying.5. A process as claimed in claim 1 or 2, wherein the component is immersed in a heated tank containing an acid solution.6. Use of a component having an artificially patinated copper or brass surface having anti-microbial and decorative properties to manufacture furniture and fittings for medical applications, commercial catering and I or food preparation, or for commercial or domestic kitchen use.
- 7. Use of artificially pre-patinated brass or copper surfaces to provide both (a) anti-microbial properties; and (b) a decorative finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0904731A GB2468704A (en) | 2009-03-19 | 2009-03-19 | Anti-microbial copper or brass surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0904731A GB2468704A (en) | 2009-03-19 | 2009-03-19 | Anti-microbial copper or brass surfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0904731D0 GB0904731D0 (en) | 2009-05-06 |
| GB2468704A true GB2468704A (en) | 2010-09-22 |
Family
ID=40639810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0904731A Withdrawn GB2468704A (en) | 2009-03-19 | 2009-03-19 | Anti-microbial copper or brass surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2468704A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994998A (en) * | 2012-12-15 | 2013-03-27 | 铜陵市青铜时代雕塑有限责任公司 | Multicolor penetrating coloring process of colorful copper |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3497401A (en) * | 1967-09-20 | 1970-02-24 | Intern Copper Research Ass Inc | Patination of copper |
| US3725138A (en) * | 1971-03-15 | 1973-04-03 | Anaconda American Brass Co | Production of synthetic patina |
| JPS5638477A (en) * | 1979-09-04 | 1981-04-13 | Nippon Peroxide Co Ltd | Formation of cupric oxide coating |
| JPS63219588A (en) * | 1987-03-09 | 1988-09-13 | Japan Carlit Co Ltd:The | Surface oxidation treatment for copper |
| GB2354774A (en) * | 1999-06-30 | 2001-04-04 | Hiraoka Environmental Science | Forming patina on copper using sodium hydrogen carbonate |
| US6253495B1 (en) * | 1996-07-09 | 2001-07-03 | Hugo Weber | Metal roof plate |
| JP2003089880A (en) * | 2001-09-14 | 2003-03-28 | Gantan Beauty Ind Co Ltd | Patina color emitting composition liquid and patina forming method |
| US20030091795A1 (en) * | 2000-06-08 | 2003-05-15 | Matti Kiik | Metal flake-surfaced roofing materials |
| US20050103409A1 (en) * | 2002-08-11 | 2005-05-19 | Hugo Weber | Cleaning System for Surfaces Exposed to Poor Weather Conditions |
| US20060172013A1 (en) * | 2005-02-03 | 2006-08-03 | Akira Hirai | Process for preparing copper oxide-coated antibacterial material |
| US20060226115A1 (en) * | 2002-05-10 | 2006-10-12 | Bernards Roger F | Composition and method for preparing chemically-resistant roughened copper surfaces for bonding to substrates |
-
2009
- 2009-03-19 GB GB0904731A patent/GB2468704A/en not_active Withdrawn
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3497401A (en) * | 1967-09-20 | 1970-02-24 | Intern Copper Research Ass Inc | Patination of copper |
| US3725138A (en) * | 1971-03-15 | 1973-04-03 | Anaconda American Brass Co | Production of synthetic patina |
| JPS5638477A (en) * | 1979-09-04 | 1981-04-13 | Nippon Peroxide Co Ltd | Formation of cupric oxide coating |
| JPS63219588A (en) * | 1987-03-09 | 1988-09-13 | Japan Carlit Co Ltd:The | Surface oxidation treatment for copper |
| US6253495B1 (en) * | 1996-07-09 | 2001-07-03 | Hugo Weber | Metal roof plate |
| GB2354774A (en) * | 1999-06-30 | 2001-04-04 | Hiraoka Environmental Science | Forming patina on copper using sodium hydrogen carbonate |
| US20030091795A1 (en) * | 2000-06-08 | 2003-05-15 | Matti Kiik | Metal flake-surfaced roofing materials |
| JP2003089880A (en) * | 2001-09-14 | 2003-03-28 | Gantan Beauty Ind Co Ltd | Patina color emitting composition liquid and patina forming method |
| US20060226115A1 (en) * | 2002-05-10 | 2006-10-12 | Bernards Roger F | Composition and method for preparing chemically-resistant roughened copper surfaces for bonding to substrates |
| US20050103409A1 (en) * | 2002-08-11 | 2005-05-19 | Hugo Weber | Cleaning System for Surfaces Exposed to Poor Weather Conditions |
| US20060172013A1 (en) * | 2005-02-03 | 2006-08-03 | Akira Hirai | Process for preparing copper oxide-coated antibacterial material |
Non-Patent Citations (2)
| Title |
|---|
| Faye Clarke, 15 June 1999, "copper patina" [online]. Available from http://www.potters.org/subject22138.htm/ [Accessed 19 August 2009] * |
| Science Company, "Patina Formulas for Brass, Bronze and Copper" [online], created/modified 03.07.06. Available from http://web.archive.org/web/20060703161003/http://www.sciencecompany.com/patinas/patinaformulas.htm * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994998A (en) * | 2012-12-15 | 2013-03-27 | 铜陵市青铜时代雕塑有限责任公司 | Multicolor penetrating coloring process of colorful copper |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0904731D0 (en) | 2009-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |