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
  • C23C22/54—Treatment of refractory metals 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
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
  • B05D3/102—Pretreatment of metallic substrates
• • 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
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
  • B05D3/141—Plasma treatment
  • B05D3/142—Pretreatment
• • 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
  • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
  • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
• • 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
  • B05D7/14—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 metal, e.g. car bodies
• • 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
  • C23C18/02—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 thermal decomposition
  • C23C18/04—Pretreatment of the material to be 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
  • 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
  • C23C18/02—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 thermal decomposition
  • C23C18/12—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material
  • C23C18/1204—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
  • C23C18/1208—Oxides, e.g. ceramics
  • C23C18/1212—Zeolites, glasses
• • 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
  • C23C18/02—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 thermal decomposition
  • C23C18/12—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material
  • C23C18/1204—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
  • C23C18/1208—Oxides, e.g. ceramics
  • C23C18/1216—Metal oxides
• • 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
  • C23C18/02—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 thermal decomposition
  • C23C18/12—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material
  • C23C18/1204—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material inorganic material, e.g. non-oxide and non-metallic such as sulfides, nitrides based compounds
  • C23C18/122—Inorganic polymers, e.g. silanes, polysilazanes, polysiloxanes
• • 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
  • C23C18/02—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 thermal decomposition
  • C23C18/12—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material
  • C23C18/1229—Composition of the substrate
  • C23C18/1241—Metallic substrates
• • 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
  • C23C18/02—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 thermal decomposition
  • C23C18/12—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 thermal decomposition characterised by the deposition of inorganic material other than metallic material
  • C23C18/125—Process of deposition of the inorganic material
  • C23C18/1254—Sol or sol-gel processing
• • 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
• • 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
  • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
• • 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
  • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
  • C23C2222/20—Use of solutions containing silanes
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31652—Of asbestos
  • Y10T428/31663—As siloxane, silicone or silane
• • 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
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31678—Of metal

Definitions

• the invention relates to a method which is suitable on metal surfaces, especially chrome surfaces, especially of sanitary and kitchen fittings, a permanent, stable, dirt and Apply water-repellent coating, as well the components coated in this way.
• Water fittings in the sanitary area are generally daily in frequent use and are always in immediate field of vision of the user. From these for both reasons they need to be cleaned regularly because dirt on the surface like limescale, Residues of dirt, cream, soaps, toothpaste, etc., as well as fingerprints the visual impression to disturb.
• regular cleaning accompanied by the use of polluting Detergent and mechanical stress of the valve surfaces when using abrasive Cleanser.
• the optically perfect impression of a freshly cleaned faucet usually works with the first lost after use.
• Modern decorative surfaces are characterized by the fact that they are next to the decorative demands multifunctional Have layer properties.
• Layer properties count that for example anti-adhesive behavior of surfaces.
• Such surfaces have a great resistance to further covering, for example with dirt particles or paints. Because of the anti-adhesive behavior these layers also have these surfaces low sensitivity to fingerprints, those during production, assembly or occur in the daily use of sanitary fittings can. Because anti-adhesive surfaces are hydrophobic Have behavior, these layers possess in usually a higher corrosion resistance.
• Leave anti-adhesive, dirt-repellent properties itself for example, by coating a galvanic chrome-plated surface (e.g. a bathroom fitting) with an anti-adhesive coating (e.g. one Sol-gel coating).
• a galvanic chrome-plated surface e.g. a bathroom fitting
• an anti-adhesive coating e.g. one Sol-gel coating.
• the goodness of this Layer systems is in addition to the layer properties in essential of the adhesion of the layer on the Chrome surface dependent. Because the chrome surface is production-related in very different or not is in a defined state, is currently not a procedure known, which is suitable, a sol-gel system to be able to apply firmly to a chrome surface.
• the layer structure of an electrodeposited Chrome layer consists of a copper base layer, an intermediate nickel layer and a chrome top layer. These layers become galvanic one after the other applied. This production chain is supplemented through numerous activation and rinsing treatments between the individual coating steps.
• the surface condition obtained from the coating is therefore a function that consists of both the physical and chemical properties of the Layer material, as well as from the type of used Coating chemicals results.
• a freshly deposited chrome surface becomes common Exposed to atmospheres, so forms on the Surface of the chrome layer is a closed, passivating Chromium oxide layer from several atomic layers.
• This oxide layer prevents further oxidation of the chromium underneath and is one of the causes for poorer wetting behavior strongly polar liquids, so that at further coating of a chrome surface usually Problems with wetting and adhesive strength result.
• So water shows on a smooth, galvanic deposited chrome layer a wetting edge angle of 90 °, a typical value for hydrophobic Surfaces that are not wetted by media with polar Allow groups.
• the latter concept allows due to the Structure no smooth, shiny surfaces, like it has been used in metal fittings for decades are and are expected by the customer.
• the described Microstructures are also not mechanical very stable, resulting in a gradual deterioration the dirt-repellent effect can be expected.
• the present invention pursues the former concept.
• the former coating materials must generally with a relatively high layer thickness (30 to several 100 ⁇ m) are chemical and mechanically mostly of limited stability and exhibit generally not an extremely low surface tension on, so that no decisive one compared to chrome Reduction of the sensitivity to dirt is achieved.
• the perfluoropolymers mentioned must also be high Layer thickness (usually over 100 microns) can be applied.
• the advantages of high chemical resistance and the pronounced anti-adhesive effect furthermore the disadvantages that the formation of a closed layer after application of the polymer dispersion only at very high temperatures (approx. 300 ° C and higher) that the mechanical hardness of the layers is small and that usually no transparent, rather cloudy layers are obtained.
• a method of making mechanically resistant and highly anti-adhesive surfaces which is described in the patent literature has been described several times (e.g. in WO 9842886, US 5753313, CN 1077144), lies in two-layer systems, consisting of a thermally sprayed (or electric arc sprayed) ceramic or Metal layer and a subsequently applied Layer of silicone resin or better fluoropolymer, which covers both the surface of the sprayed layer as well as their depressions and pores.
• this process is complex since it two complex coating steps with completely different Technology involves and through Heat of the spray material and the high processing temperature of the polymer resins temperature-stable substrates is reserved. Also arise here structured, non-transparent surfaces.
• a perfluoropolymer phase can also in the form of an IPN (interpenetrating network) penetrating network) or a nanocomposite with another polymer, e.g. (as in WO 9701599 disclosed) applied a polysiloxane become.
• IPN interpenetrating network
• nanocomposite with another polymer e.g. (as in WO 9701599 disclosed) applied a polysiloxane become.
• Such materials are due low surface tension a good covering of the underground expect the problem of liability on a smooth surface, e.g. of chrome, is still not solved.
• Sol-gel coatings have the advantage, yes with significantly smaller layer thicknesses (1-10 ⁇ m) stable, to form transparent layers. This will little coating material used and the outer Appearance of the coated workpiece so little impaired as possible.
• the networking of such Layers already take place at temperatures between 100 ° C and 150 ° C, which saves energy is less and thermally sensitive substrates (e.g. electroplated chrome-plated plastics) as well can be coated without damage. Because of her These layers have a high degree of crosslinking mechanical stability that of organic Materials is superior. The high inorganic Share of such connections also leads to a high stability against chemical attack and high temperatures.
• Such systems of organofunctional functionalized Nanoparticle sol coatings are made of numerous Patents, such as DE 2446279, JP 06145600, WO 92/21729, DE 19917367, DE 10004132, known.
• sol-gel coatings are predestined for generating dirt and water repellent Layers on sanitary fittings, especially chrome-plated Sanitary fittings, because of them a strong one Non-stick effect can be achieved without doing so the beneficial properties of metal surfaces get lost.
• the so far unsolved problem with this The task was the insufficient surface tension electroplated chrome surfaces, the poor wetting and poor adhesion leads.
• the alternative activation steps Ia), Ib) and Ic) with which the metallic surface is modified are necessary to determine the wetting behavior of the Improve surface and an adhesive coating with sol-gel systems.
• the modification the metallic surface leads to a defined Surface condition, which is characterized by that the surface has a higher surface energy and therefore has better adhesion which enables sol-gel systems on the surface.
• Another variant is based on a physical one Activation of the surface.
• the metallic Surface evacuated in a vacuum chamber and subjected to a plasma treatment.
• the components are thereby evacuated in a vacuum chamber and onto a heated substrate-dependent temperature, the The components are usually heated in an inert manner Atmosphere.
• a glow discharge is ignited at temperature by applying a DC voltage between the component and recipient wall is caused so that ionized gas species accelerated towards the component and hit the surface of the components.
• the surface is then activated from the collision cascades that hit the gas particles trigger while adhering to the surface Remove oxides and impurities (sputtering).
• a passivated surface also be understood a surface that is only partially passivated, and at least one partially activated surface.
• the next step is to activate the one activated in this way and modified metallic surface dirt and water repellent sol-gel layer system applied, which has a good adhesive strength.
• Another decisive advantage lies in the improved hygiene, since the adherence of microorganisms is made more difficult and they cannot develop on the surface in question in the absence of water.
• the latter advantage is of central importance for fittings used in the medical field, for example in clinics.
• Another advantage of the invention lies in the corrosion protection effect of the coating or the layer system due to its high chemical resistance and its high electrical resistance.
• the terms coating and layer system are used as synonyms.
• the formation of local elements with other metals is avoided as effectively as the chemical attack by corrosive gases such as oxygen and SO 2 , which cannot penetrate to the actual metal surface.
• corrosive gases such as oxygen and SO 2
• the method according to the invention is preferred in this way performed that by activating the steps Ia) and / or Ib) and / or Ic, the surface energy the metallic surface to values> 40 mN / m and is particularly preferably increased> 50 mN / m. On this way the defect-free and permanent allows adhesive coating of the metallic surface.
• chemical activation is a to the galvanically coated component DC voltage applied, making it more suitable when used Surfactant solutions the energy state of the chrome surface is changed so that the adhesive strength of sol-gel layers on this surface strongly is improved.
• the Potential enables the oxidation state of to change oxidized metallic surfaces so that the hydrophilicity of the surface are increased can.
• the physical activation i.e. the sputtering process is preferred in a hydrogen-nitrogen-argon atmosphere carried out.
• the coating of the surface following the activation is preferably carried out starting from hydrolyzable silanes, which are placed in a solvent and hydrolyzed with water and a catalyst.
• the resulting silanol groups then condense with one another to form siloxane bonds, as a result of which dispersed polysiloxane particles are formed.
• the resulting polysiloxane particles can be functionalized in virtually any way.
• Alkyl and aryl group-functionalized silanes are suitable for the production of hydrophobic particles and thus hydrophobic layers, while functionalized silanes on the one hand enable optimum adhesion of the layer on the substrate and on the other hand enable the particles to crosslink with one another by means of the reactive groups.
• condensable compounds other than silicon which also form oxide networks (such as B, Al, Ti, Zr, P, Ge, Sn, etc.), enables further options for modifying the sol particles and the resulting layers.
• oxide networks such as B, Al, Ti, Zr, P, Ge, Sn, etc.
• nanoscale oxide particles eg SiO 2 , Al 2 O 3 , etc.
• the layer system from at least one crosslinkable organofunctional functionalized Sol containing compounds formed.
• the at least one sol will be at temperatures between 50 and 250 ° C and particularly preferably between 100 and 200 ° C networked.
• Surfaces are preferably smooth or textured Chrome, VA (stainless steel), nickel and / or aluminum surfaces used.
• a component with a Dirt and / or water repellent sol-gel coating ready on the metallic surface asked by the inventive method was produced.
• the coating has cross-cut adhesion to the surface in question from Gt0 to.
• the coating of the component is transparent and crack-free. Only based on the invention Pretreatment of the surface it is possible that the adhesive strength of the coating is secured can be.
• the surface has of the component has a wetting edge angle of Water of> 100 ° and particularly preferably> 105 °.
• the coating process is used especially in the field of sanitary and kitchen fittings. Faucets in these areas mostly have metal surfaces on that highly contaminants due to media that are difficult to remove, e.g. Oil vapor, Splashes of fat, salt water, egg yolk, are exposed.
• the method is also used for others Household appliances with metallic surfaces.
• Household appliances with metallic surfaces Here is mainly to think of commercial areas, such as e.g. Restaurants, hotels, clinics, public toilets. So far it has been necessary here for a daily or even more frequent cleaning of the fittings becomes.
• the solution according to the invention can now the time required for cleaning is significantly reduced become, whereby in the course of several years of use a Substantial cost reduction results with the cost is not to be weighed for the coating.
• Sol from example 1 is galvanized by flooding chrome-plated dash panel applied. After evaporation the solvent becomes the layer system thermally cured (150 ° C, 1 h). Already during the coating process wetting disorders occur, i.e. the initially closed film on the metal surface tears open in several places. After this Curing gives a transparent coating with numerous defects, which are pronounced anti-adhesive Effect shows itself from a glued on Adhesive tape but can tear off completely.
• Sol from Example 1 is analogous to Example 2 electroplated chrome sample sheet (format 60 x 100 mm) coated. On the coating surface a cross cut is made and then the sheet at 40 ° C a wet climate (100% humidity, DIN 50017) exposed. After four days large peeling of the layer is observed.
• a galvanically chrome-plated sample sheet (format 60 x 100 mm) shows a water-wetting contact angle of 90 °. This sheet is held at 70 ° C for 5 minutes immersed an alkaline silicate solution, then rinsed with distilled water and compressed air dried. A new determination of the wetting contact angle of water after treatment gives one Value of 30 °.
• a galvanically chrome-plated test sheet will last 5 minutes immersed in an alkaline silicate solution at 70 ° C for a long time and electrolytically by applying DC voltage cleaned, then with distilled Purified water and dried with compressed air. A Determination of the wetting contact angle of water after the treatment gives a value of 29 °.
• a galvanically chrome-plated test sheet is in one Hydrogen-nitrogen-argon atmosphere cleaned, by a glow discharge between the sheet and the reactor wall, ignited by applying a DC voltage becomes.
• a determination of the wetting contact angle of water after treatment gives a value of 43 °.
• Sample sheet treated according to Example 4 is treated with the Sol mixture from Example 9 coated by flooding and then thermally cured at 150 ° C for 1 h.
• Sol is made from this adhesive layer Example 1 coated by flooding and then thermally cured at 150 ° C for 1 h. Even the resulting one Two-layer system has cross-cut adhesion by GtO. Shows on this surface Water a wetting contact angle of 109 ° and hexadecane a contact angle of 62 °. Even after 28 days in Wet climate (40 ° C, 100% humidity) observed no peeling of the layers, the adhesion value is still GtO.
• a galvanically chrome-plated bathroom fitting orifice is pretreated analogously to example 4, coated analogously to example 10 and then cut up. Part of the panel coated in this way is stored in the SO 2 climate for three days (DIN 500 18). There is no external change in the coated surface. Then a cross cut is made on the coated surface down to the surface and the SO 2 test is continued for two more days. One only observes brown tarnishing at the place of the cut, there is no infiltration of the coating. The coated surface remains optically unchanged, while the uncoated back is completely corroded.
• Another part of the coated screen from example 11 is a scrub test with detergent (Crocktest) subjected. After 100,000 abrasion cycles no rubbing through on the surface is recognizable.
• a wash basin tap becomes analogous to example 4 pretreated and analogous to Example 11 with adhesive layer coated with an anti-adhesive top layer, however not by flooding, but by spray coating using HVLP spray gun. Subsequently it becomes one in a frequently used washroom Factory installed. After 6 months in use the repellent property of the surface is still intact, it is not flaking or infiltration the coating recognizable.
• Sample sheet treated according to Example 6 becomes analogous to Example 10 with adhesive layer and anti-adhesive top layer coated.
• the wetting contact angles of Water and hexadecane are 108 ° and 61 °, respectively
• Two-layer system has cross-cut adhesion GtO, after 28 days in a humid climate (40 ° C, 100% humidity) no peeling of the Layers, the liability value is still GtO.
• Sample sheet treated according to Example 8 becomes analogous to Example 10 with adhesive layer and anti-adhesive top layer coated.
• the wetting contact angles of Water and hexadecane are 108 ° and 60 °, respectively
• Two-layer system has cross-cut adhesion GtO, after 28 days in a humid climate (40 ° C, 100% humidity) no peeling of the Layers, the liability value is still GtO.

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• 2001
  • 2001-07-16 DE DE10134473A patent/DE10134473B4/de not_active Expired - Fee Related
• 2002
  • 2002-07-10 US US10/192,307 patent/US6887367B2/en not_active Expired - Lifetime
  • 2002-07-15 EP EP02015767A patent/EP1277851A1/fr not_active Withdrawn
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