WO2017005287A1 - Monture pour pierre décorative, pourvue d'un revêtement de laiton à aspect ancien - Google Patents

Monture pour pierre décorative, pourvue d'un revêtement de laiton à aspect ancien Download PDF

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Publication number
WO2017005287A1
WO2017005287A1 PCT/EP2015/065273 EP2015065273W WO2017005287A1 WO 2017005287 A1 WO2017005287 A1 WO 2017005287A1 EP 2015065273 W EP2015065273 W EP 2015065273W WO 2017005287 A1 WO2017005287 A1 WO 2017005287A1
Authority
WO
WIPO (PCT)
Prior art keywords
gemstone
brass
masking
socket
degreasing
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.)
Ceased
Application number
PCT/EP2015/065273
Other languages
German (de)
English (en)
Inventor
Martin Rauch
Christoph TRIENDL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
D Swarovski KG
Original Assignee
D Swarovski KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by D Swarovski KG filed Critical D Swarovski KG
Priority to PCT/EP2015/065273 priority Critical patent/WO2017005287A1/fr
Publication of WO2017005287A1 publication Critical patent/WO2017005287A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • B05D5/062—Wrinkled, cracked or ancient-looking effect
    • 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
    • C23C22/73—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 characterised by the process
    • 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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment
    • 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
    • B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • B05D1/322—Removable films used as masks
    • B05D1/325—Masking layer made of peelable film
    • 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
    • B05D2202/00—Metallic substrate

Definitions

  • the invention relates to a process for the production of an artificial "antique brass discoloration" on a blank of a gemstone setting, as well as the products which are produced by this process.
  • the "antique brass discoloration” is protected from environmental influences by a protective layer.
  • a jewelery base is often made of a low-cost material, for example brass, a copper-zinc alloy or pure zinc. Brass has a gold-like appearance and is cheaper than gold. Natural aging of the gold or brass results in partial surface discoloration. By wearing on the skin, as is usually the case with jewelery, the desired "Vi ntage effect", would become very unsightly as a result of the reaction with sweat after a short time, it is therefore desirable to develop a brass discoloration, which in particular in the jewelry sector the decorative demands of a "vintage effect" and the wearing requirements, especially a protection against skin sweat, is sufficient.
  • the gemstone mount is made of brass or a brass-containing alloy, since brass is well suited for processing technical reasons and has a gold-like appearance. Brass and all other metals and alloys mentioned herein are used in the purity known to those skilled in the art.
  • a partial masking is applied on the gemstone mount.
  • the masking serves to leave areas of the surface of the gemstone setting free to be able to process them for the desired aging effect.
  • the masking must be sufficiently resistant to oxidants.
  • a stripping lacquer is preferably used for the masking. Peel-off coatings have the advantage that they can be applied to the material like a protective skin and then removed again without residue. Particularly preferred for the masking PVC Abziehlacke be used. Peel-off properties, such as adhesiveness, can be altered by monomeric and polymeric plasticizers.
  • To apply the Abziehlackes there are a variety of ways, for example, there is the possibility of spraying or liquid application. The methods are the specialist well known.
  • the masking is preferably applied according to the invention with a stencil.
  • the template can be made of a variety of materials, such as plastic, metal or textile. The template releases those areas that are to be further processed, the others remain covered.
  • the free areas of the masked gemstone casing are treated with an oxidizing agent.
  • Potassium permanganate is preferably used as the oxidizing agent.
  • the gemstone collection is immersed, for example, in an aqueous potassium permanganate solution or sprayed with an aqueous potassium permanganate solution. The uncovered areas react with the oxidizing agent and are thereby discolored brownish.
  • a solvent for example ethyl acetate.
  • the protective varnish prevents the metal parts from reacting with the sweat of the skin and also improves the resistance of the metal layers.
  • varnish is understood as meaning a liquid or pulverulent coating material which is applied thinly to objects and is built up by chemical or physical processes, for example evaporation of the solvent, to form a continuous, solid layer. Paints often contain binders, fillers, pigments, solvents, resins and / or acrylates and additives, such as biocides. Suitable examples are acrylic lacquers, epoxy lacquers or polyurethane lacquers.
  • Acrylic paints are manufactured on the basis of acrylic resins.
  • Acrylic resins are synthetic resins and are considered particularly durable.
  • Acrylic resins are based on polymers or copolymers of acrylic acid or methacrylic acid and their esters. They are often copolymerized with other unsaturated monomers, such as styrene or acrylonitrile.
  • Acrylic paints are either dissolved in solvents or dispersed in water and applied to the coated gemstone mount.
  • Acrylic coatings have a high weather resistance and are UV-resistant and are therefore particularly well suited according to the invention.
  • Epoxy paints often contain the two components epoxy resin and hardener.
  • Epoxy resins are polyadducts of epichlorohydrin with bisphenol derivatives, for example A, F or S. These are crosslinked with a hardener. Usually, the two components epoxy resin and hardener are mixed shortly before processing. Epoxy coatings are characterized by high chemical and mechanical resistance, but are not optimal in terms of UV resistance.
  • the urethane group is characteristic. They are commercially available as one-component and multicomponent coatings, for example the hardener is already mixed with the base coat in the case of one-component lacquer and the hardener and base coat are separated in the two-component lacquer. Polyurethane coatings are particularly hard, abrasion resistant and resistant to water, oils and chemicals.
  • a polyurethane varnish is preferably used as the protective varnish.
  • Polyurethane paints have good adhesion properties and are resistant.
  • Two-component polyurethane acrylic resin paints have proven to be advantageous, in particular the products DE 4259x from Hesse and Lignal, since they are saliva and sweat resistant according to DIN 53160. They can be applied without thermal aftertreatment and are lightfast.
  • the gemstone socket Before applying the masking a) the gemstone socket can optionally be cleaned or degreased.
  • Degreasing is the removal of adhering fats, oils or other contaminants with degreasing agents.
  • the cleaning or degreasing of, for example, brass has the advantage that the adhesion of the protective coating d) is improved.
  • the cleaning can be done mechanically, with solvents, for example ethyl acetate, or else with ultrasound, for example with the Evolution WP-K device from German Sonic.
  • Another option for pretreatment is electrolytic degreasing.
  • electrolytic degreasing the gemstone socket is in an electrolytic solution and is then cleaned by applying a current.
  • electrolytic degreasing a distinction is made between cathodic and anodic degreasing.
  • the cathodic degreasing proceeds under hydrogen evolution and the anodic degreasing under evolution of oxygen.
  • the cathodic degreasing is preferably used because it can be achieved in the jewelry bodies such as brass very good cleaning.
  • the brass surface may optionally be treated with acid to remove oxide layers. Sulfuric acid has proven to be advantageous for the cleaning of brass jewel casings.
  • the surface of the gemstone is roughened, for example brass optional before applying the partial masking a) the surface of the gemstone.
  • the gemstone socket thus receives a surface that corresponds to a surface caused by weathering and aging.
  • the brass is preferably dipped in nitric acid.
  • the optional cleaning or degreasing and the optional roughening of the surface of the gemstone setting can be done in any order.
  • Another object of the application are products which are obtainable by the process according to the invention.
  • the preferred embodiments of the process lead to inventively preferred products.
  • the gemstone frame is optionally cleaned or degreased.
  • degreasing of brass parts is especially the cathodic, alkaline electrolytic degreasing.
  • the solution contains, for example, caustic soda and surfactants.
  • the degreasing is carried out for a period of at least 1 minute, a temperature of 35 ⁇ - 55 ⁇ and a current density of at least 3 A / dm 2, for example with the 1018 agent IWG-Plating Vienna. Thereafter, the gemstone socket is cleaned with deionized water.
  • the brass is immersed in nitric acid (about 55 to 65% by weight) for at least 20 seconds.
  • a masking is partially applied to the gemstone socket.
  • a stencil is preferably used.
  • peelable coatings for example Redowax 1 12 from Erne or Galvanolack GC 1 10 from Adhesive Products, are suitable on account of their adhesion properties.
  • the masked gemstone casing is aftertreated with an oxidizing agent by being immersed for at least 20 seconds in an aqueous potassium permanganate solution (about 10 to 15% by weight) with a solution temperature of about 70 ° to 90 °.
  • the masked Gemstone socket receives by the reaction with the oxidizing agent at the left by the masking sites a brownish discoloration.
  • step c) of the process the masking is removed with a solvent, for example ethyl acetate.
  • a protective varnish is applied to the gemstone casing in order to prevent, for example, the reaction of skin sweat with the gemstone casing.
  • a protective varnish acrylic varnish, epoxy varnish, for example Duralit 1516-754 S from Rohm and Haas or also polyurethane varnish can be used.
  • the gemstone frame made of the FRMSBR alloy from AGS Alpha Guss Metals and Alloys GmbH Pforzheim was degreased electrolytically with the agent 1018 from IWG-Plating Wien for 5 minutes at a temperature of 45 ° and a current density of 5 A / dm 2 . Thereafter, the degreased brass parts were washed with deionized water.
  • the brass jewelery frame was dipped in 10% sulfuric acid (wt.%) For about 1 minute. Thereafter, the gemstone socket was washed again with deionized water. Subsequently, the gemstone socket was immersed in nitric acid (60% by weight) for about 30 seconds.
  • the masked gemstone socket was immersed in an aqueous 10% potassium permanganate solution (wt%) at about 80 ° C for about 30 seconds.
  • the stripping lacquer was removed with the solvent ethyl acetate.
  • the gemstone socket was coated with the protective coating by being dipped in the two-component polyurethane-acrylic resin paint DE 42597-0040 from Hesse & Lignal and dried at about 25 ° C. for a period of about 14 hours.

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

La présente invention concerne un procédé de coloration en partie artificiel d'une monture pour pierre décorative. La coloration du laiton pour obtenir un aspect ancien se caractérise par un aspect qui correspond au processus de vieillissement naturel, et est protégée par une couche de protection. La présente invention concerne également des produits fabriqués selon ledit procédé.
PCT/EP2015/065273 2015-07-05 2015-07-05 Monture pour pierre décorative, pourvue d'un revêtement de laiton à aspect ancien Ceased WO2017005287A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/065273 WO2017005287A1 (fr) 2015-07-05 2015-07-05 Monture pour pierre décorative, pourvue d'un revêtement de laiton à aspect ancien

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/065273 WO2017005287A1 (fr) 2015-07-05 2015-07-05 Monture pour pierre décorative, pourvue d'un revêtement de laiton à aspect ancien

Publications (1)

Publication Number Publication Date
WO2017005287A1 true WO2017005287A1 (fr) 2017-01-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/065273 Ceased WO2017005287A1 (fr) 2015-07-05 2015-07-05 Monture pour pierre décorative, pourvue d'un revêtement de laiton à aspect ancien

Country Status (1)

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WO (1) WO2017005287A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR401112A (fr) * 1909-03-22 1909-08-19 Philippe Brod Procédé pour colorer des bronzes ou autres objets métalliques
US3284249A (en) * 1963-06-28 1966-11-08 Anaconda American Brass Co Decorative finish for copper
WO1997035046A1 (fr) * 1996-03-15 1997-09-25 Brumagne Jean Claude Procede de traitement de surface metallique d'un materiau compose ou revetu de cuivre et/ou de zinc
US7018677B2 (en) 2003-07-17 2006-03-28 Crown-Pn L.L.C. Simulated patina for copper
US20090139264A1 (en) 2007-11-30 2009-06-04 Rachel Brown Antique jewelry articles and methods of making same
US8956510B2 (en) 2011-06-03 2015-02-17 Frederick Goldman, Inc. Coated metallic products and methods for making the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR401112A (fr) * 1909-03-22 1909-08-19 Philippe Brod Procédé pour colorer des bronzes ou autres objets métalliques
US3284249A (en) * 1963-06-28 1966-11-08 Anaconda American Brass Co Decorative finish for copper
WO1997035046A1 (fr) * 1996-03-15 1997-09-25 Brumagne Jean Claude Procede de traitement de surface metallique d'un materiau compose ou revetu de cuivre et/ou de zinc
US7018677B2 (en) 2003-07-17 2006-03-28 Crown-Pn L.L.C. Simulated patina for copper
US8007866B2 (en) 2003-07-17 2011-08-30 BFS Diversified Products Company, LLC Simulated patina for copper
US20090139264A1 (en) 2007-11-30 2009-06-04 Rachel Brown Antique jewelry articles and methods of making same
US8956510B2 (en) 2011-06-03 2015-02-17 Frederick Goldman, Inc. Coated metallic products and methods for making the same

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