EP3171672B1 - Systeme de revetement electroluminescent et au moins un objet presentant une surface de revetement, equipe du systeme de revetement, et utilisation du systeme de revetement pour la fabrication de parois, de sols ou de plafonds electroluminescents - Google Patents

Systeme de revetement electroluminescent et au moins un objet presentant une surface de revetement, equipe du systeme de revetement, et utilisation du systeme de revetement pour la fabrication de parois, de sols ou de plafonds electroluminescents Download PDF

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Publication number
EP3171672B1
EP3171672B1 EP15195724.8A EP15195724A EP3171672B1 EP 3171672 B1 EP3171672 B1 EP 3171672B1 EP 15195724 A EP15195724 A EP 15195724A EP 3171672 B1 EP3171672 B1 EP 3171672B1
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EP
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Prior art keywords
layer
coating system
electrically conductive
frontward
layers
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EP15195724.8A
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German (de)
English (en)
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EP3171672A1 (fr
Inventor
Christian Walter
Oliver Nickel
Stefan Kairies
Patrick Gengenbach
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DAW SE
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DAW SE
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces

Definitions

  • the present invention relates to a luminous coating system and to an article having at least one coatable surface, which is provided with the luminous coating system according to the invention. Furthermore, the invention relates to the use of the inventive luminous coating system for the production of luminous walls, floors and ceilings.
  • the WO 2013/091605 A1 a light image of an imaging material, such as a silver halide-based photographic material, and an electroluminescent device, wherein the electroluminescent device comprises a light-emitting layer containing pigments, in particular zinc sulfide, in an aqueous dispersion and an insulating layer containing titanium dioxide in an aqueous binder matrix, which on the imaging material is attached and forms with this a multi-layer dressing.
  • the electroluminescent device can be connected in one embodiment by means of an adhesive film with a transparent support.
  • the lighting image according to the WO 2013/091605 A1 should be easy to produce, have a particularly good durability and brightness and give the impression of a bright photo. From Of particular importance for this is the multi-layered bond between an imaging material and the electroluminescent device, which allows a solid bond with little to no space between the imaging material and the electroluminescent device.
  • an electroluminescent device may comprise a luminescent layer containing inorganic electroluminescent particles, in particular doped or encapsulated zinc sulfide, and water-dispersible or water-soluble protective colloids, such as gelatin, and optionally a plasticizer.
  • This luminescent layer should have a thickness of less than 40 ⁇ m and be arranged on a support and also have an alcohol-soluble, transparent, conductive front electrode layer.
  • the layers mentioned should be able to be produced in a casting process.
  • the ease of manufacture and good durability of the luminous element according to WO 2013/091604 A1 should be ensured by the presence of a protective colloid.
  • the luminous element on a carrier should have the following layers: an adhesive layer which improves the adhesion of the overlying layers to the carrier, a transparent and electrically conductive layer as the front electrode, a layer which can be excited by an AC electric field Leuchtsubstanz contains as he, an insulating layer with high dielectricity, a layer of high conductivity as a return electrode, conductors as a connection of the front electrode, a barrier layer and contacts and connections for an AC voltage source.
  • a powder or wet paint in the form of a polyester or acrylate for electrostatic coating of an object is known in which to a transparent paint powder and / or wet paint, a powder of a luminescent and / or reflective substance, such as strontium aluminate, and organic or inorganic Pigments that glow in the dark after charging by UV radiation in the dark have been added.
  • a lacquer should be obtainable in that luminescent and / or reflective particles together with at least partially transparent powder coating particles and / or wet paint in an electrostatic high voltage field in which the surface of the object to be coated forms a potential surface moves to the surface of the article and to you are attached firmly.
  • the EP 2 334 151 A1 describes a method for producing an electroluminescent element comprising a substrate and an electroluminescent device obtained by spraying the layers of the electroluminescent device, comprising the steps of a) spraying the first electrode onto the substrate or onto an insulating layer applied to the substrate , b) spraying the electroluminescent layer and c) spraying the second electrode.
  • a suspension comprising 30 to 90% by weight of ZnS crystals, 10 to 40% by weight of binder, selected from one and two component polyurethanes, 1 to 50% by weight, solvent selected from ethoxypropyl acetate, ethyl acetate, butyl acetate, methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, solvent naphtha or any mixtures of two or more of these solvents, 0.1 to 2 wt .-% leveling agent and 0.01 to 10 wt .-% rheology additives.
  • electroluminescent devices should be applied to substrates that are not electrically conductive per se formed and beyond also can not be easily provided with an electroluminescent arrangement due to their spatial configuration.
  • sprayable formulations for the electrodes, the electroluminescent layer and the insulating layer of the electroluminescent arrangement can be used.
  • the US 8,470,388 relates to a method of making a conformal electroluminescent system comprising the steps of: selecting a substrate; Applying a base backplate film layer to the substrate using an aqueous conductive backplate material; Applying a dielectric film layer to the backplane film layer using a water-based dielectric material; Applying a phosphor film layer to the dielectric film layer using a water-based phosphor material, wherein the phosphor film layer is excited by a source of ultraviolet radiation during use, the source of ultraviolet radiation providing visual cues while the phosphor film layer is being applied, wherein the application of the phosphor film layer is in response is adjusted to the visual cues during the phosphor deposition step to obtain a generally uniform distribution of the phosphor material on the dielectric film layer; and applying an electrode film layer on the phosphor film layer using a substantially transparent, water-based, electrically conductive electrode material, wherein the backplane plate film, the dielectric film layer, the phosphor film layer, and
  • electroluminescent coatings are applied only on absolutely smooth, non-absorbent substrates. In many cases this is due to special processes such as screen printing and special tools such as paint guns. It is also disadvantageous that it is not possible to obtain surfaces which are as smooth as usual in the craft industry, for example grinding, for smoothing substrates, as would be required for conventional electroluminescent coating systems.
  • a luminous coating system has been found according to the features of patent claim 1. It comprises, in this order, a) a back electrically conductive layer, b) a dielectric luminescent layer, c) a front-side electrically conductive transparent or translucent layer, and d) an electrically insulating barrier layer.
  • the barrier layer can also serve as a sealing layer.
  • At least one of the layers a), b), c) and d), in particular all of these layers, are obtainable by means of brush, roller, in particular paint roller, trowel, trowel and / or doctor blade application, or are obtained in this way receive.
  • the luminous coating system according to the invention is accordingly distinguished by the fact that it can be applied to a variety of substrates using typical painting application methods, as are customary in the artisan building trades.
  • the inventive luminous coating system on all surfaces or substrates are applied, which are common in building related trades, such as floors, ceilings, walls or more generally objects or bodies made of concrete, masonry, plastic or wood or the like.
  • the rear electrically conductive layer a) is preferably not transparent, in particular not translucent. It can be based on a one- or two-component system.
  • the rear electrically conductive layer a) of the coating system according to the invention is formed from a system consisting of or containing at least one binder and at least one electrically conductive substance or filler based on carbon, for example carbon black, graphite, carbon nanotubes and / or graphene.
  • the rear electrically conductive layer a) is preferably also characterized in that it can be applied or processed by means of a brush, paint rollers, spatula, trowel and / or doctor blade.
  • the rear electrically conductive layer a) of the coating system according to the invention may alternatively or additionally also be in the form of a fabric, or may contain the aforementioned substances.
  • the weight ratio is from the solids content of the binder to the solids content of the electrically conductive substances, e.g. the electrically conductive fillers, in the rear electrically conductive layer a) in the range of 0.5: 1 to 1.5: 1 and preferably in the range of 0.8: 1 to 1.2: 1, based on the total dry mass of the Layer a) forming components.
  • the dielectric luminescent layer b) is based on a two-component system.
  • the dielectric luminescent layer b) is not transparent, especially not translucent.
  • the dielectric luminescent layer b) comprises an electrically insulating rear dielectric layer b1), consisting of or containing electrically non-conductive binder and electrically non-conductive fillers having a permittivity of at least 5, and a, in particular electrically insulating, frontward luminescent layer b2), consisting of or containing at least one binder, in particular an alkyd resin, epoxy resin, acrylate resin and / or polyurethane binder, and at least one electroluminescent particulate material, in particular zinc sulfide, wherein, in particular in addition to the at least one layer a), c) and d) or in addition to all layers a), c) and d), at least one of the layers b1) and b2), in particular both layers, by means of brush, roller, in particular paint roller, trowel
  • the rear, electrically insulating, dielectric layer b1) generally contains an electrically non-conductive binder and / or electrically non-conductive fillers.
  • the rear dielectric layer b1) is formed in a preferred embodiment from a system consisting of or containing at least one non-electrically conductive binder and at least one non-electrically conductive filler.
  • suitable non-conductive binders and non-conductive fillers are known to those skilled in the art.
  • Suitable binders for the rear, electrically insulating, dielectric layer b1) are known to those skilled in the organic binder in question. By way of example, reference is also made to silicatic and calcitic fillers.
  • At least one filler selected from a first group consisting of talc, mica, precipitated calcium carbonates, ground calcium carbonates, natural silicas, artificial silicas and feldspars.
  • At least one such filler is preferably selected from a second group consisting of alumina, yttria, zirconia, hafnia, tantalum oxide, lanthana, titania, calcium copper titanate, lead zirconium. Titanate and barium titanate. Barium titanate is particularly preferably used for this purpose.
  • the layer b1) comprises at least one, in particular at least two, and very particularly preferably at least three of the said fillers from the first and / or second group. It is also preferred if the non-conductive fillers predominantly from the above-mentioned first and / or second groups in particular at least 55% by weight, preferably at least 75% by weight, very particularly preferably at least 85% by weight, of the fillers (each dry fraction) are selected from the first and / or second group. In one embodiment, it is preferred if at least one filler from the first group and at least one filler from the second group is included.
  • composition which forms the rear, electrically insulating, dielectric layer b1) can also be applied or processed by means of a brush, paint roller, spatula, trowel and / or doctor blade.
  • the components of this composition which, after application to the rear electrically conductive layer a) form the rear, electrically insulating, dielectric layer b1), are selected such that the critical pigment volume concentration (KPVK) is always undershot by at least 5%, and more preferably by at least 10%. In this way, it is possible to reduce or minimize the number of less impact-resistant air pores.
  • KPVK critical pigment volume concentration
  • compositions specified above it is possible in this case to apply rear, electrically insulating, dielectric layers b1) which are particularly smooth, leveling, thin-layered and crack-slurring and have high permittivity.
  • the components of the composition which form the rear electrically conductive layer a) are selected such that the critical pigment volume concentration (KPVK) is always exceeded.
  • Such coating systems of the invention have proved to be particularly useful, which further have a, in particular smooth or smoothed and / or non-capillary active, substrate for the attachment or support of the rear electrically conductive layer. In this way one obtains very reliably a permanently functioning luminous coating system.
  • The, in particular electrically insulating, frontward luminescent layer b2) is preferably formed from a one- or two-component system. It is preferably transparent or translucent.
  • the frontward luminescent layer b2) is preferably formed from a System consisting of or containing at least one non-electrically conductive binder, optionally at least one non-electrically conductive filler, and at least one electroluminescent particulate material.
  • the electroluminescent particulate material is preferably based on Cu, Au, Mn, Ag, Fe, Pb, P, As, Sb, Sn, V, Tl, Sc, Co, Ni, Tm, Tb, Dy, Gd, Yb, Sm and or Eu doped ZnS, ZnSe, SrS, CaS and / or CdS, in particular ZnS, or on barium aluminum sulfate doped with said elements, gallium nitride, gallium sulfide, gallium selenide and / or strontium aluminate or any mixtures of the aforementioned substances.
  • the frontward luminescent layer b2) is usually based on at least one binder and at least one filler.
  • the frontward luminescent layer b2) contains at least one electroluminescent pigment as an electroluminescent particulate material.
  • non-conductive binders and non-conductive fillers are preferably used.
  • Particularly suitable binders in this case are those with which it is possible to protect the electroluminescent pigments from moisture.
  • alkyd resin, epoxy resin, acrylate, and polyurethane binders may be mentioned here.
  • Suitable binders also include the class of UV-curing binders.
  • UV-curing binders UV-curing acrylate binders are preferred.
  • acrylate binder are suitable in which the curing is not carried out by means of UV radiation, but for example thermally.
  • polyurethane binders with 2K polyurethane systems being particularly suitable among these polyurethane binders.
  • the critical pigment volume concentration (KPVK) is always undershot, preferably by at least 5% and particularly preferably by at least 10%. In this way it is possible to minimize the number of less impact-resistant air pores in this layer.
  • the compositions specified above can be used to apply frontward luminescent layers b2) which are well-running, leveling, thin-layered, electrically insulating, transparent to opaque and electroluminescent.
  • the frontward ones Luminous layer b2) forming composition is preferably applied or processed by means of brush, paint roller, spatula, trowel and / or doctor blade.
  • electroluminescent particulate materials which have an average particle size in the range from 10 ⁇ m to 100 ⁇ m and preferably in the range from 20 ⁇ m to 40 ⁇ m.
  • the frontward electrically conductive layer c) can be formed in a preferred embodiment from a system containing or consisting of carbon fibers and / or carbon nanotubes (CNTs) and / or silver nanowires (SNWs) or containing or consisting of graphene or containing or consisting of poly (3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT: PSS).
  • this frontward electrically conductive layer a) may also consist of or contain polyaniline.
  • the frontward electrically conductive layer a) to consist of a system comprising or consisting of at least one binder and at least one electrically conductive fiber material or containing or consisting of at least one metal oxide, in particular indium tin oxide, antimony tin oxide, Fluorine-zinc oxide and / or aluminum-zinc oxide, to form.
  • the composition forming the frontward electrically conductive layer c) is preferably applied or processed by means of a brush, roller, in particular paint roller, spatula, trowel and / or doctor blade.
  • the frontward electrically conductive layer c) can be made very thin.
  • the frontward electrically conductive layer c) is present as a substantially transparent or translucent layer.
  • the frontward electrically conductive layer c) of the coating system according to the invention can alternatively also be formed in the form of a fabric or contain the substances mentioned above conductive substances.
  • the barrier layer d) is generally based on a one- or two-component system, which is preferably substantially transparent or translucent.
  • the barrier layer d) generally contains an electrically non-conductive binder and optionally also at least one electrically non-conductive filler.
  • the barrier layer d) is formed in a preferred embodiment of a system consisting of or containing at least a non-electrically conductive binder and at least one non-electrically conductive filler.
  • Suitable non-conductive binders and non-conductive fillers are known to those skilled in the art.
  • Suitable binders for the barrier layer d) are, for example, organic binders known to the person skilled in the art.
  • silicate and calcitic fillers for suitable non-conductive fillers.
  • transparent or translucent fillers such as quartz or alabaster are preferably used.
  • fillers such as glass beads, glass bubbles and / or plastic beads such as PMMA beads can be used for the barrier layer. Particularly good results with regard to the transparency or translucency of this layer are obtained when the barrier layer is substantially or completely unfilled, i. without addition of fillers remains.
  • the barrier layer protects the electroluminescent system from environmental stresses and, on the other hand, protects the environment from the electrical voltage in this electroluminescent system.
  • the composition forming the barrier layer d) is preferably applied or processed by means of a brush, paint roller, spatula, trowel and / or doctor blade. Particularly preferred are the components of this composition, which form the barrier layer d) after application to the frontward electrically conductive layer c), selected such that the critical pigment volume concentration (KPVK) is always below, preferably by at least 5% and especially preferably at least 10%. Most preferably, the barrier layer d) contains no fillers. For this case, the KPVK goes against infinity. In this way, it is possible to minimize the number of less impact-resistant air pores.
  • the compositions specified above can readily be applied to the front-side, electrically conductive layer c), which is very smooth, leveling, substantially transparent or translucent and electrically insulating.
  • Such luminous coating systems according to the invention which further comprise at least one electrical insulation layer between the substrate and the back electrically conductive layer, between the back electrically conductive layer and the back dielectric layer, between the back dielectric layer and the front luminous layer . between the frontward luminescent layer and the frontward electrically conductive transparent or translucent layer and / or between the frontward electrically conductive transparent or translucent layer and the barrier layer.
  • Such luminous coating systems according to the invention are very particularly preferred, which furthermore have at least one electrical insulation layer between the substrate and the rear electrically conductive layer.
  • the composition forming the electrical insulation layer is preferably applied or processed by means of a brush, paint roller, spatula, trowel and / or doctor blade.
  • the electrical insulation layer is present between the rear electrically conductive layer and the rear dielectric layer.
  • the electrical insulation layer may be based, for example, on 2K polyurethane systems having a first and a second component, aqueous two-component polyurethane systems being preferred.
  • the weight ratio of the first to the second components K is usually in the range from 10: 1 to 2: 1, preferably in the range from 5: 1 to 3: 1.
  • the weight ratio of the first to the second components K of a suitable 2K aqueous polyurethane system is 4: 1.
  • Suitable aqueous 2-component polyurethane water-based systems are based, for example, on hydroxy-functional polyesters, e.g.
  • the first component may comprise a hydroxy-functional polyacrylate dispersion, e.g. 60% by weight, a defoamer, e.g. 2.5% by weight, a substrate wetting additive, e.g. 0.5% by weight, a leveling additive, e.g. 1.0% by weight, a thickener, e.g.
  • first and second components are present in the 2K mixture, preferably in a ratio of 75% by weight (dry content of the first component) to 25% by weight (dry content of the second component).
  • the at least one binder and the at least a backside electrically conductive layer comprising a filler a) has a pigment / volume concentration (PVK) above the critical pigment / volume concentration.
  • the backside dielectric layer b1) has a pigment / volume concentration (PVK) below the critical pigment / volume concentration, preferably at least 5 percent and more preferably at least 10 percent below the critical pigment / volume concentration.
  • the frontward luminescent layer b2), the frontward electrically conductive transparent or translucent layer c) and / or the electrically insulating barrier layer d preferably the layers b1), b2), c) and d
  • all layers b1), b2), c) and d) have a pigment / volume concentration (PVK) below the critical pigment / volume concentration, preferably at least 5, except layer a) of the luminous coating system according to the invention Percent, and more preferably at least 10 percent below the critical pigment / volume concentration.
  • the at least one binder of the rear electrically conductive layer a), the rear dielectric layer b1), the frontward luminescent layer b2), the frontward electrically conductive transparent or translucent layer c) and / or the electrically insulating barrier layer d) are based Alkyd resins, epoxy resins or polyurethanes, in particular polyurethanes.
  • the rear dielectric layer and / or the frontward luminescent layer on alkyd resins, epoxy resins, acrylate resins, in particular UV-curing acrylate resins, or polyurethanes, in particular polyurethanes, and / or UV-curing binders
  • the mean distance between the rear electrically conductive layer and the front-side electrically conductive transparent or translucent layer is substantially constant.
  • Such coating systems according to the invention are also preferred in which the rear dielectric layer is reflective or in which the rear dielectric layer is designed to scatter the light.
  • the electroluminescent particulate material is preferably, in particular substantially uniformly, embedded in the binder of the dielectric luminescent layer b) or the front luminescent layer b2).
  • Such objects according to the invention are preferred, which further comprise a device for generating an alternating electrical voltage field in the dielectric luminescent layer b) or in the frontward luminescent layer b2).
  • the AC electric field is in a suitable embodiment at a frequency in the range of 100 to 5000 Hz, preferably in the range of 100 to 800 Hz, in particular wherein the voltage is greater than 100 V, in particular greater than 150 V and more preferably greater than 200 V.
  • luminous walls, floors and ceilings can be produced, preferably with typical application methods.
  • an electroluminescent system which emits light when an alternating voltage is applied.
  • the luminous coating system according to the invention thereby provides a capacitor which is constantly reloaded when alternating voltage is applied.
  • the rear electrically conductive layer a) and the frontward electrically conductive transparent or translucent layer c) are the electrodes of the capacitor.
  • an electric field is formed between the two electrodes of the capacitor, in which the energy that is supplied to the capacitor by the charging is stored.
  • the electroluminescent particulate material present in the luminous layer b) or in the frontward luminous layer b2) derives its energy from the change in this electric field.
  • the energy stored in the capacitor is maximum, but the field strength of the electric field no longer changes, so that the electroluminescent particulate material which has illuminated during the charging process, goes out.
  • translucent means that a corresponding translucent layer is translucent.
  • Transparency means that the layer is transparent (translucent) and the light is not or only partially dispersed when the layer passes through. The same applies to several layers.
  • the transmittance in the case of translucency and optionally in the case of transparency is preferably> 0.2, ie more than 20% of the incident visible light is transmitted.
  • the transmittance T is defined as the quotient between the light intensity behind one or possibly several layers and the intensity in front of said layer or layers.
  • the degree of transmittance is determined at a wavelength of 450 nm, 550 nm and / or 650 nm. It is sufficient for the definition or invention if the transparency characteristic is satisfied for at least one of said wavelengths, but preferably at least for the wavelength 650 nm. It is particularly preferred if the transmittance for all three wavelengths has said values.
  • the average layer thicknesses of the individual layers forming the luminous coating system are often in the range of 10 to 2000 ⁇ m. Such layer thicknesses can be easily obtained with a brush, roller, trowel, spatula or squeegee.
  • generally voltages greater than 100 V, in particular greater than 150 V and particularly preferably greater than 200 V are applied, preferably the frequency of the AC electric field in the range from 100 to 5000 Hz, in particular Range of 100 to 800 Hz, lies.
  • the rear electrically conductive layer a) should preferably have a minimum thickness of at least 20 ⁇ m, in particular at least 30 ⁇ m, preferably at least 40 ⁇ m. Furthermore, this layer thickness should preferably not exceed 2000 ⁇ m, in particular 200 ⁇ m, preferably 100 ⁇ m. Particular preference is given to layer thicknesses of the layer a) in the range from 20 to 600 .mu.m, in particular from 25 to 250 .mu.m, preferably from 25 to 100 .mu.m, very particularly preferably from 40 to 80 .mu.m. It has been shown that excellent results are achieved, in particular in the range from 50 to 70 ⁇ m. If the stated lower limits are considerably undershot, the conductivity can be lowered and adversely affect the functionality of the coating according to the invention.
  • the layer b1) should preferably have a layer thickness of at least 20 ⁇ m, in particular at least 30 ⁇ m, preferably at least 40 ⁇ m. It is also preferred if the layer thickness of the layer b1) is not more than 500 ⁇ m, preferably not more than 300 ⁇ m, in particular not more than 200 ⁇ m, particularly preferably not more than 160 ⁇ m. Particular preference is given to layer thicknesses of the layer b1) in the range from 20 to 300 .mu.m, in particular from 30 to 200 .mu.m, preferably from 40 to 160 .mu.m, very particularly preferably from 60 to 120 .mu.m. It has been shown that to lower Layer thicknesses may not provide optimal insulation effect. Furthermore, it has been found that excessively selected layer thicknesses can, according to experience, have disadvantages with regard to the luminous effect.
  • the layer b2) preferably has a layer thickness of at least 15 ⁇ m, in particular at least 20 ⁇ m, preferably at least 30 ⁇ m. It is also preferred if the layer thickness is not more than 300 ⁇ m, preferably not more than 150 ⁇ m, in particular not more than 120 ⁇ m, particularly preferably not more than 80 ⁇ m. Particular preference is given to layer thicknesses of the layer b1) in the range from 15 to 150 ⁇ m, in particular from 20 to 120 ⁇ m, preferably from 20 to 80 ⁇ m, very particularly preferably from 30 to 70 ⁇ m.
  • the layer thickness of the layer b1) is greater than the layer thickness of the layer b2), in particular at least 25% larger, preferably at least 50% larger, very particularly preferably at least twice as large.
  • the layer thickness of layer b which preferably results from the sum of the layer thicknesses of b1) and b2), is not more than 500 ⁇ m, in particular not more than 300 ⁇ m, preferably not more than 250 ⁇ m, completely more preferably not more than 200 microns, is.
  • the layer c) preferably has a layer thickness of at least 5 ⁇ m, in particular at least 10 ⁇ m, preferably at least 20 ⁇ m. It is also preferred if the layer thickness is not more than 100 ⁇ m, preferably not more than 80 ⁇ m, in particular not more than 60 ⁇ m, particularly preferably not more than 40 ⁇ m. Particular preference is given to layer thicknesses of the layer c) in the range from 5 to 100 ⁇ m or 80 ⁇ m, in particular 10 to 60 ⁇ m, preferably 10 to 40 ⁇ m, very particularly preferably 10 to 30 ⁇ m.
  • the conductivity can be ensured, wherein the transparency and / or translucency is also optimized.
  • the layer c) is thinner than each of the layers a), b), and d), preferably also thinner than the layers b1) and / or b2).
  • the layer d) preferably has a layer thickness which is at least 30 ⁇ m, preferably at least 60 ⁇ m, particularly preferably at least 100 ⁇ m.
  • the layer thickness d) can in principle be chosen to be very large, so that the layer is several centimeters thick.
  • the layer is preferably not more than 10 mm, in particular not more than 1 mm, preferably not more than 5000 ⁇ m, particularly preferably not more than 2500 ⁇ m, thick.
  • Particular preference is given to layer thicknesses of layer d) in the range from 50 to 1 mm, in particular from 60 to 5000 ⁇ m, preferably from 60 to 2500 ⁇ m, very particularly preferably from 100 to 2000 ⁇ m.
  • the said layer thickness of the layer d) usually provides adequate protection.
  • the layer a) has an average, in particular absolute, layer thickness in the range 20 to 600 microns, and / or the layer b) over an average, in particular also absolute, layer thickness of a maximum of 500 ⁇ M, and / or the layer c) over an average, in particular absolute, layer thickness in the range of 5 to 80 microns, and / or the layer d) over an average, in particular also absolute, layer thickness of at least 60 microns.
  • such an embodiment has proven to be particularly suitable, in which the layer a) over an average, in particular absolute, layer thickness in the range of 20 to 600 microns and the layer b) over an average, in particular also absolute, layer thickness of not more than 500 ⁇ M, and the layer c) have an average, in particular absolute, layer thickness in the range of 5 to 80 microns and the layer d) have an average, in particular also absolute, layer thickness of at least 60 microns.
  • the layer thicknesses increase in the order c), a), b), d), in particular wherein the layer thickness of b1) is preferably greater than the layer thickness of b2). It has been found that the specified coating systems obtained in this way give particular luminous and resistant coatings.
  • a layer thickness is basically an average layer thickness, unless express reference is made to an absolute layer thickness.
  • the layer thickness shall be determined in accordance with EN ISO 2808: 2007 (method 6A). It should also be noted that the layer thicknesses obtained are production-related can vary locally. This depends in particular on the application method. It is familiar to the person skilled in the art to determine the layer thickness over a cross-section or possibly several cross-sections which are representative.
  • the coating system according to the invention With the coating system according to the invention, even larger areas, for example, greater than 1 m 2 , can be made contiguous and free electroluminescent without further ado, even with demanding geometries such as sphere, rod, column, corner or edge. Consequently, the present invention eliminates the size limitation previously associated with electroluminescent films. These usually allow only an electroluminescent area of about 1 m 2 .
  • the present invention is accompanied by the surprising finding that the luminous coatings according to the invention can also be applied to surfaces which are not absolutely smooth and / or absorbent, even with the tools commonly used in building ancillary industries such as brushes, rollers, in particular paint rollers, spatulas, trowels and / or doctor blade, with even large-scale decorative lighting images are available.
  • the well-known in the craft usual measures for smoothing surfaces can be omitted. This is attributable inter alia to the fact that even with the components which form the individual layers of the luminous coating system according to the invention, a smoothing of substrate surfaces and a compensation of the absorbency of substrates succeed.
  • the luminous coating system of the present invention even under site conditions on a relatively rough and absorbent substrate such as a gypsum board in such a manner as to obtain a luminous image.
  • the luminous coating system according to the invention can also be applied to mineral substrates such as concrete, screed and masonry or to an old paint or a plasterboard substrate.
  • For mounting the luminous coating systems according to the invention it is no longer necessary to resort to highly specialized experts and to complex tools which are usually used for applying electroluminescent coating systems, such as screen printing and paint guns. Such methods and tools tools are usually not available on a construction site.
  • the luminous coating system 1, as in FIG. 1 is formed by the rear electrically conductive layer 2, the electrically insulating, backward dielectric layer 4, the electrically insulating frontward luminescent layer 6, the frontward electrically conductive transparent or translucent layer 8 and the electrically insulating barrier layer 10.
  • the individual layers of the conductive coating system 1 can be applied by brush, roller, spatula, trowel or doctor in the order shown.
  • the rear electrically conductive layer 2 is applied to the substrate 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Paints Or Removers (AREA)

Claims (20)

  1. Système de revêtement luminescent, comprenant, dans cet ordre,
    a) une couche arrière électriquement conductrice,
    b) une couche diélectrique luminescente,
    c) une couche avant électriquement conductrice transparente ou translucide et
    d) une couche barrière électriquement isolante, où
    au moins une des couches a), b), c) et d), en particulier l'ensemble de ces couches, pouvant être obtenues ou étant appliquées au moyen d'une application à la brosse, au rouleau, en particulier au rouleau de peinture, à la spatule, à la truelle et/ou à la racle, où la couche luminescente diélectrique b) comprenant
    une couche arrière diélectrique électriquement isolante b1) comprenant des liants électriquement non conducteurs et des charges électriquement non conductrices avec une permittivité d'au moins 5, et
    une couche luminescente avant, en particulier électriquement isolante, b2), se composant de, ou comprenant, au moins un liant, en particulier un liant de résine alkyde, de résine époxy, de résine acrylate et/ou de polyuréthane, et au moins un matériau particulaire électroluminescent, en particulier du sulfure de zinc, où la couche diélectrique arrière b1) comprenant l'au moins un liant et l'au moins une charge présentant une concentration pigmentaire volumique (CPV) inférieure à la concentration pigmentaire volumique critique (CPVC), de préférence d'au moins 5 %, et en particulier de préférence d'au moins 10 %, inférieure à la concentration pigmentaire volumique critique, où la couche arrière électriquement conductrice a) étant formée à partir d'un système se composant de, ou comprenant, au moins un liant et au moins une substance électriquement conductrice à base de carbone, où la couche arrière électriquement conductrice a) présentant une concentration pigmentaire volumique (CPV) supérieure à la concentration pigmentaire volumique critique (CPVC), et où
    en plus d'au moins une des couches a), c) et d) ou en plus de l'ensemble des couches a), c) et d), au moins l'une des couches b1) et b2), en particulier les deux couches, pouvant être obtenu(e)s ou étant appliquée(s) au moyen d'une application à la brosse, au rouleau, en particulier au rouleau de peinture, à la spatule, à la truelle et/ou à la racle.
  2. Système de revêtement selon la revendication 1, caractérisé en ce que la couche luminescente avant b2) est une couche luminescente électriquement isolante.
  3. Système de revêtement selon la revendication 1 ou 2, comprenant en outre un support, en particulier lisse ou lissé et/ou sans effet capillaire, pour l'application, ou comme soutien, de la couche arrière électriquement conductrice.
  4. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la substance électriquement conductrice à base de carbone représente du noir de carbone, du graphite, des nanotubes de carbone et/ou du graphène.
  5. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    les charges électriquement non conductrices avec une permittivité d'au moins 5 comprenant de l'oxyde d'aluminium, de l'oxyde d'yttrium, de l'oxyde de zirconium, de l'oxyde d'hafnium, de l'oxyde de tantale, de l'oxyde de lanthane, de l'oxyde de titane, du titanate de calcium cuivre, du titanate de plomb zirconium et/ou du titanate de baryum.
  6. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la couche luminescente avant b2) est formée à partir d'un système se composant de, ou comprenant, au moins un liant électriquement non conducteur, le cas échéant au moins une charge électriquement non conductrice, ainsi qu'au moins un matériau particulaire électroluminescent, de préférence à base de ZnS, ZnSe, SrS, CaS et/ou CdS, en particulier ZnS, dopés au Cu, Au, Mn, Ag, Fe, Pb, P, As, Sb, Sn, V, Tl, Sc, Co, Ni, Tm, Tb, Dy, Gd, Yb, Sm et/ou Eu, ou à base de sulfate de baryum aluminium, de nitrure de gallium, de sulfure de gallium, de séléniure de gallium et/ou d'aluminate de strontium.
  7. Système de revêtement selon la revendication 6, caractérisé en ce que le matériau particulaire électroluminescent présente une taille de grain moyenne dans la plage de 20 µm à 40 µm.
  8. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la couche avant électriquement conductrice c) est formée à partir d'un système comprenant des, ou se composant de, nanotubes de carbone (CNT) et/ou nanofils métalliques ou de leur tissu, en particulier de nanofils d'argent (SNW) ou de leur tissu, ou comprenant du, ou se composant de, graphène, ou comprenant du, ou se composant de, poly(3,4-éthylènedioxythiophène) poly(styrène sulfonate) (PEDOT:PSS), ou comprenant du, ou se composant de, polyaniline, ou d'un système comprenant, ou se composant de, au moins un liant et au moins une fibre électriquement conductrice, ou comprenant, ou se composant de, au moins un oxyde métallique, en particulier de l'oxyde d'indium-étain, de l'oxyde d'antimoine-étain, de l'oxyde de fluor-zinc et/ou de l'oxyde d'aluminium-zinc.
  9. Système de revêtement selon l'une quelconque des revendications précédentes, comprenant en outre
    au moins une couche d'isolation électrique entre le support et la couche arrière électriquement conductrice, entre la couche arrière électriquement conductrice et la couche arrière diélectrique, entre la couche arrière diélectrique et la couche luminescente avant b2), entre la couche luminescente avant b2) et la couche avant transparente ou translucide électriquement conductrice et/ou entre la couche avant transparente ou translucide électriquement conductrice et la couche barrière, où au moins une des couches d'isolation mentionnées précédemment, en particulier l'ensemble de ces couches d'isolation, pouvant être obtenu(e)s ou étant appliqué(e)s au moyen d'une application à la brosse, au rouleau, en particulier au rouleau de peinture, à la spatule, à la truelle et/ou à la racle, en particulier en plus de l'au moins une couche a), b), c) ou d) ou en plus de l'ensemble des couches a), b), c) ou d) ou en plus de l'au moins une couche a), b1), b2), c) ou d) ou en plus de l'ensemble des couches a), b1), b2), c) ou d).
  10. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la couche luminescente avant b2) comprenant l'au moins un liant et l'au moins une charge, la couche avant transparente ou translucide électriquement conductrice c) et/ou la couche barrière électriquement isolante d), en particulier les couches b1), b2), c) et d) présentent une concentration pigmentaire volumique (CPV) inférieure à la concentration pigmentaire volumique critique (CPVC), de préférence d'au moins 5 % et en particulier de préférence d'au moins 10 % inférieure à la concentration pigmentaire volumique critique.
  11. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    l'au moins un liant de la couche arrière électriquement conductrice a), de la couche arrière diélectrique b1), de la couche luminescente avant b2), de la couche avant transparente ou translucide électriquement conductrice c) et/ou de la couche barrière électriquement isolante d) est basé sur des résines d'alkyde, des résines époxy, des acrylates, en particulier des acrylates durcissant aux UV, ou des polyuréthanes, en particulier des polyuréthanes.
  12. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la couche arrière diélectrique est conçue de façon réfléchissante ou en ce que la couche arrière diélectrique est conçue de façon à disperser la lumière.
  13. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la couche luminescente diélectrique b) ou la couche luminescente avant b2) est intégrée au système de revêtement de façon protégée contre l'oxygène et/ou l'humidité.
  14. Système de revêtement selon l'une des revendications 6 à 13, caractérisé en ce que le matériau particulaire électroluminescent est intégré au liant de la couche luminescente diélectrique b) et/ou de la couche luminescente avant b2), en particulier essentiellement de façon régulière.
  15. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la couche barrière d) ne comprend pas de charge ou en ce que la couche barrière d) comprend des charges transparentes et/ou translucides, en particulier sélectionnées parmi le groupe se composant de : quartz, albâtre, billes de verre, billes de verre creuses, billes de plastique, en particulier billes de PMMA, et de leurs mélanges.
  16. Système de revêtement selon l'une des revendications 9 à 15, caractérisé en ce que la couche d'isolation électrique est basé sur des systèmes de polyuréthane à 2 composants, en particulier comprenant comme premier composant ou comme élément du premier composant (composant A) des polyesters hydroxyfonctionnels, par exemple des résines acryliques, et comme deuxième composant ou comme élément du deuxième composant (composant B), des polyisocyanates aliphatiques, de préférence dans un rapport de poids dans la plage de 10:1 à 2:1, en particulier de préférence dans la plage de 5:1 à 3:1.
  17. Système de revêtement selon l'une quelconque des revendications précédentes, caractérisé en ce que
    l'épaisseur moyenne, en particulier aussi l'épaisseur absolue, de la couche c) est inférieure à l'épaisseur moyenne, en particulier aussi l'épaisseur absolue, de chacune des couches a), b) et d), en particulier inférieure à chacune des couches a), b1), b2) et d), et/ou où les épaisseurs de couche moyennes, de préférence aussi de couche absolue, augmentent dans l'ordre c), a), b), d), en particulier c), a), b2), b1) et d).
  18. Objet présentant au moins une surface pouvant être revêtue, en particulier paroi, sol ou plafond, muni d'au moins un système de revêtement selon l'une des revendications 1 à 17.
  19. Objet selon la revendication 18, comprenant en outre
    un dispositif pour la génération d'un champ de tension alternative électrique dans la couche luminescente diélectrique b) ou dans la couche luminescente avant b2), où le champ de tension alternative électrique présentant une fréquence dans la plage de 100 à 5 000 Hz, en particulier de préférence dans la plage de 100 à 800 Hz, et où la tension étant en particulier supérieure à 100 V, de préférence supérieure à 150 V et en particulier de préférence supérieure à 200 V.
  20. Utilisation du système de revêtement selon l'une des revendications 1 à 17 pour la fabrication de parois, sols ou plafonds lumineux.
EP15195724.8A 2015-11-20 2015-11-20 Systeme de revetement electroluminescent et au moins un objet presentant une surface de revetement, equipe du systeme de revetement, et utilisation du systeme de revetement pour la fabrication de parois, de sols ou de plafonds electroluminescents Not-in-force EP3171672B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15195724.8A EP3171672B1 (fr) 2015-11-20 2015-11-20 Systeme de revetement electroluminescent et au moins un objet presentant une surface de revetement, equipe du systeme de revetement, et utilisation du systeme de revetement pour la fabrication de parois, de sols ou de plafonds electroluminescents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15195724.8A EP3171672B1 (fr) 2015-11-20 2015-11-20 Systeme de revetement electroluminescent et au moins un objet presentant une surface de revetement, equipe du systeme de revetement, et utilisation du systeme de revetement pour la fabrication de parois, de sols ou de plafonds electroluminescents

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EP3171672A1 EP3171672A1 (fr) 2017-05-24
EP3171672B1 true EP3171672B1 (fr) 2019-09-11

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CN107833654B (zh) * 2017-11-07 2020-07-28 贵州电网有限责任公司 一种耐腐蚀降低杆塔接地电阻的柔性石墨复合接地线及其制备方法
CN115772328B (zh) * 2022-12-09 2024-08-30 陕西科技大学 一种高介电导热复合材料及制备方法和应用

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DE10219802A1 (de) 2001-05-03 2002-12-12 Wolfgang Woebel Verfahren zum Beschichten eines Gegenstandes und dafür vorgesehener Pulverlack
EP2334151A1 (fr) * 2009-12-10 2011-06-15 Bayer MaterialScience AG Procédé de fabrication d'un élément électroluminescent par application de pulvérisation sur des objets formés d'une manière quelconque
KR20140108244A (ko) 2011-12-19 2014-09-05 이노피슈코아트 게엠베하 전계발광 배열체를 구비한 발광 소자 및 발광 소자의 제조 방법
DE112012005313A5 (de) 2011-12-19 2015-04-23 Inoviscoat Gmbh Leuchtbild
US20130171903A1 (en) * 2012-01-03 2013-07-04 Andrew Zsinko Electroluminescent devices and their manufacture

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