EP3938332A1 - Procede de protection d'un substrat en verre revetu d'un empilement electrochrome et procede de fabrication d'un vitrage isolant - Google Patents
Procede de protection d'un substrat en verre revetu d'un empilement electrochrome et procede de fabrication d'un vitrage isolantInfo
- Publication number
- EP3938332A1 EP3938332A1 EP20709257.8A EP20709257A EP3938332A1 EP 3938332 A1 EP3938332 A1 EP 3938332A1 EP 20709257 A EP20709257 A EP 20709257A EP 3938332 A1 EP3938332 A1 EP 3938332A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrochromic stack
- glass substrate
- protective layer
- substrate coated
- protecting
- 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.)
- Pending
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
- C03C17/3417—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/42—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating of an organic material and at least one non-metal coating
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/1533—Constructional details structural features not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
- C03C2218/328—Partly or completely removing a coating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/355—Temporary coating
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/1533—Constructional details structural features not otherwise provided for
- G02F2001/1536—Constructional details structural features not otherwise provided for additional, e.g. protective, layer inside the cell
Definitions
- TITLE OF THE INVENTION Method of protecting a glass substrate coated with an electrochromic stack and method of manufacturing an insulating glazing
- the present invention relates to a method of protecting glass substrates coated with an electrochromic stack, as well as a method of manufacturing an insulating glazing comprising an electrochromic stack.
- Electrochromic devices are electrochemical devices with electrically controllable optical and / or energy properties. These devices have certain characteristics that can be changed under the effect of an appropriate power supply between a clear state and a tinted state. Said modifiable characteristics are in particular the following: transmission, absorption, reflection in certain wavelengths of electromagnetic radiation, in particular in the visible and / or in the infrared, or even light diffusion. The variation in transmission generally occurs in the optical domain (infrared, visible, ultraviolet) and / or in other fields of electromagnetic radiation, hence the name of device with variable optical and / or energy properties, the optical domain n ' being not necessarily the only area concerned.
- these devices used as glazing make it possible from a thermal / energy standpoint to control the solar gain inside rooms or cockpits / compartments when they are mounted in exterior glazing of buildings or windows of means of transport of the car type, train, plane, and to avoid excessive heating of these in the event of strong sunlight.
- they allow control of the degree of vision, which makes it possible to avoid glare when they are mounted in exterior glazing in the event of strong sunlight. They can also have a particularly advantageous shutter effect, both as exterior glazing and interior glazing, for example to fit interior partitions between rooms (offices in a building), or to insulate compartments in trains or planes for example.
- electrochromic devices require the preparation of glass substrates coated with a stack of several thin layers of different thickness and nature named in the present application. "Electrochromic stacking".
- the preparation of such substrates for the manufacture of electrochromic devices and therefore insulating glazing often involves various operations of transformation, treatment, handling, cutting, transport, washing and / or storage. It is in fact common and practical to carry out the various assembly and / or treatment at a location other than that where the substrates bearing the electrochromic stack are manufactured. These different operations can thus cause alterations / defects such as scratches and any other contamination. Some of these operations can also cause short circuits within the electrochromic stack causing an absence of local tint very visible to an observer. Contamination or damage reduces the viability and efficiency of the electrochromic stack, in other words causes a decrease in the optical and energy / thermal properties imparted by said stack to the substrates.
- an electrochromic stack comprises a first transparent electroconductive layer, a layer of electrochromic material, a layer of an ionically conducting electrolyte, a layer of counter-electrode and a second transparent electroconductive layer. Glass substrates coated with such an electrochromic stack are very sensitive:
- the temporary protection must be sufficiently durable to allow protection of the surface of the glass substrate coated with the electrochromic stack from both the mechanical and chemical alterations mentioned above and which are specifically related to the electrochromic stack.
- Temporary protection must be easily removable. It should be possible to remove the temporary protective layer at temperatures and over a period of time that do not cause damage to the electrochromic stack.
- the subject of the invention is a method of protecting a glass substrate coated with an electrochromic stack, characterized in that it comprises at least the following step:
- a temporary protective layer on said electrochromic stack comprising an organic polymer matrix and having a thickness of between 1 pm and 30 pm and,
- said protective layer being removable by heat treatment at a temperature of between 300 ° C and 500 ° C, for a period of between 180 s and 240 s.
- the expression “temporary protective layer which can be removed or eliminated by a heat treatment” or “elimination of the temporary protective layer by a thermal treatment” is understood to mean, when it is observed on the last layer of the electrochromic stack.
- the electrochromic stack is clean, or
- a layer comprising an organic polymeric matrix having a thickness between 1 ⁇ m and 30 ⁇ m could temporarily protect an electrochromic stack deposited on a glass substrate and that this could be removed by a heat treatment at a temperature between 300 ° C and 500 ° C, for a period of between 180 s and 240 s, that is to say by a heat treatment carried out at a lower temperature than that of the quenching type carried out at a temperature above 600 ° C; without harming the optical and / or energetic properties of the substrate carrying the electrochromic stack.
- the temporary protective layer according to the invention is specifically intended to be removed by a heat treatment carried out by means of an oven (called a "firing oven” in English), in particular a NABER or Northglass type oven; at a sufficient temperature between 300 ° C and 500 ° C to allow its removal by thermal decomposition and for a period of between 180 s and 240 s, sufficient time to remove said temporary protective layer while preserving the properties of the stack electrochromic on which the temporary protective layer was deposited.
- a heating oven in English
- NABER or Northglass type oven at a sufficient temperature between 300 ° C and 500 ° C to allow its removal by thermal decomposition and for a period of between 180 s and 240 s, sufficient time to remove said temporary protective layer while preserving the properties of the stack electrochromic on which the temporary protective layer was deposited.
- the temporary protective layer according to the invention comprises an organic polymer matrix.
- the organic polymer matrix is preferably obtained from a polymerizable liquid composition comprising (meth) acrylate compounds. Its chemical formulation allows rapid and complete combustion during a heat treatment and generates during its decomposition only volatile molecules that are easy to eliminate.
- This temporary protective layer may advantageously be insoluble in water, which makes it possible to obtain effective protection against humidity and during the washing steps.
- the protection is preserved even when the substrate undergoes successive cuts.
- the substrates protected according to the invention can therefore be cut several times without the need to modify the protective layer and without losing the mechanical and chemical protective functions.
- the subject of the invention is also a method of manufacturing an insulating glazing comprising a first glass substrate coated with an electrochromic stack, characterized in that said method comprises the following steps:
- said temporary protective layer comprising an organic polymeric matrix and having a thickness between 1 ⁇ m and 30 ⁇ m
- the method may further include a cutting step before or after the step of removing the temporary protective layer.
- the step of depositing a temporary protective layer is easily integrated into the insulating glazing manufacturing process as described above.
- the use of a laminated counter-glass in this process helps to ensure the mechanical durability of the insulating glass.
- a temporary protective layer obtained from a liquid composition essentially free of solvent and cured preferably by UV irradiation, by IR baking or by electron beam is particularly advantageous.
- the choice of this solvent-free technology considerably simplifies the industrial implementation of a process comprising a step of applying such a layer.
- the absence of solvent makes it possible to avoid the installation of a device for drying, recovering and treating solvent vapors which must not be emitted into the atmosphere.
- the modifications to be made may be limited to inserting at the end of the line a deposition device, for example by "roller coater" coating, as well as a crosslinking device such as a UV lamp.
- the liquid composition may have, thanks to the judicious choice of the (meth) acrylate compounds, a suitable viscosity to make it possible to easily obtain a temporary protective layer of thickness preferably between 5 ⁇ m and 20 ⁇ m and a reactivity sufficient to allow a almost instantaneous crosslinking over the entire thickness.
- a temporary protective layer of thickness preferably between 5 ⁇ m and 20 ⁇ m and a reactivity sufficient to allow a almost instantaneous crosslinking over the entire thickness.
- the chemical nature, thickness and degree of crosslinking of the temporary protective layer helps to achieve effective protection against the appearance of scratches and other contamination.
- the coating speeds are compatible with the deposition rates of the layers forming an electrochromic stack, which allows continuous manufacture of the electrochromic devices according to the invention.
- the application speeds of the coat of temporary protection comprising for example the coating and the crosslinking, can be between 5 and 50 m / min on a substrate of width 0.2 m to 3.3 m.
- the glass substrate according to the invention is a silico-soda-lime type substrate and has a thickness of between 1.5 mm to 6 mm, preferably a thickness of 2.1 mm.
- the glass substrate is preferably of the float type, that is to say capable of having been obtained by a process consisting in pouring the molten glass onto a bath of molten tin ("float" bath).
- the electrochromic stack according to the invention comprises, in order from a first glass substrate or in reverse order:
- a layer of electrochromic material capable of reversibly and simultaneously inserting ions, the oxidation states of which correspond to the inserted and removed states are of a distinct coloration when subjected to an appropriate power supply; one of these states having a higher light transmission than the other,
- a counter-electrode layer capable of reversibly inserting ions of the same charge as those that the electrochromic material can insert
- the order of the layers between the two transparent conductive layers can be reversed: counter-electrode then electrolyte and finally electrochromic material.
- the electrochromic material is preferably based on tungsten oxide (cathodic electrochromic material) or iridium oxide (anodic electrochromic material). These materials can insert cations, especially protons or lithium ions.
- the counter-electrode preferably consists of a neutral colored layer or, at least, transparent or slightly colored when the electrochromic layer is in the colored state.
- the counter-electrode is preferably based on an oxide of an element chosen from tungsten, nickel, iridium, chromium, iron, cobalt, rhodium, or based on a mixed oxide of 'at least two of these elements, in particular mixed oxide of nickel and tungsten. If the electrochromic material is tungsten oxide, therefore a cathodic electrochromic material, the colored state of which corresponds in the most reduced state, an anodic electrochromic material based on nickel or iridium oxide can for example be used for the counter-electrode.
- electrochromic material it may in particular be a layer of mixed oxide of vanadium and tungsten or of mixed oxide of nickel and tungsten.
- electrochromic material is iridium oxide
- a cathodic electrochromic material for example based on tungsten oxide, can act as a counter-electrode.
- an optically neutral material in the oxidation states concerned, such as, for example, cerium oxide or organic materials such as electronically conductive polymers (polyaniline) or Prussian blue.
- the electrolyte is in the form of a polymer or a gel, in particular a proton conduction polymer, for example such as those described in European patents EP 0 253 713 and EP 0 670 346, or a lithium ion conduction polymer, for example such as those described in patents EP 0 382 623, EP 0 518 754 or EP 0 532 408.
- a proton conduction polymer for example such as those described in European patents EP 0 253 713 and EP 0 670 346
- a lithium ion conduction polymer for example such as those described in patents EP 0 382 623, EP 0 518 754 or EP 0 532 408.
- the electrolyte consists of a mineral layer forming an ionic conductor which is electrically insulated. These electrochromic systems are then designated as being “all solid”. Reference may in particular be made to European patents EP 0 867 752 and EP 0 831 360.
- the electrochromic stack according to the invention can also be of the “all polymer” type, in which two electrically conductive layers are arranged on either side of a stack comprising a polymer with cathodic coloring, an electronically insulating ionic conductive polymer (of H + or Li + very particularly) and finally a polymer with anodic coloring (such as polyaniline or polypyrrole).
- the electrochromic stack can also comprise various layers, in particular sublayers preferably based on oxides, super-layers preferably based on oxides or intermediate layers, intended for example to facilitate the deposition of a layer. subsequent, or to protect certain layers against mechanical or chemical attack (resistance to corrosion, abrasion, etc.)
- the electrochromic stack can for example be topped with a protective layer based on silica and / or alumina.
- the two electroconductive electrodes must be joined to respective current supply connectors.
- This connection is usually obtained by means of metal foils which are respectively brought into contact with the first electrode and with the second electrode.
- the current leads can also be obtained by a screen printing technique, in particular based on silver, which can also be deposited on the second transparent electroconductive layer, in particular in the form of current conducting bars (in English “bus bars”).
- the electrochromic stack is preferably "all solid" and comprises successively from the substrate:
- a first electrically conductive layer preferably based on ITO, having a thickness of 390 nm; as a variant, it may be a layer of tin oxide doped with fluorine or with antimony, or a multilayer comprising a stack of layers of the ITO / ZnO: Al / Ag / ZnO: Al / type.
- ITO in particular of respective thicknesses 15 to 20 nm for I ⁇ TO / 60 to 80 nm for ZnO: Al / 3 to 15 nm for silver / 60 to 80 nm for ZnO: Al / 15 to 20 nm for I ⁇ TO,
- a layer of cathodic electrochromic material preferably based on tungsten oxide WO3 or mixed oxide of vanadium and tungsten, having a thickness of 400 nm,
- a layer of an ionically conductive electrolyte preferably consisting of a layer of silicon oxide, typically 15 nm thick
- anode counter-electrode preferably made of an oxide of a tungsten-nickel alloy, having a thickness of 270 nm thick
- a second transparent electroconductive layer preferably based on ITO, having a thickness of 420 nm, or SnO 2: F, or as a variant an upper electroconductive layer comprising other conducting elements: it can be more particularly d 'associating the electrically conductive layer with a more conductive layer than it, and / or with a plurality of bands or conductive wires.
- an upper electroconductive layer comprising other conducting elements: it can be more particularly d 'associating the electrically conductive layer with a more conductive layer than it, and / or with a plurality of bands or conductive wires.
- the above electrochromic stack further comprises:
- sub-layer preferably based on nobium oxide, having a thickness of 5 nm
- a sublayer preferably based on silicon oxide, having a thickness of 30 nm
- said sub-layers being located upstream of the first transparent electrically conductive layer
- an overcoat preferably based on silicon oxide, having a thickness of 70 nm
- said over-layer being located downstream of the second transparent electroconductive layer.
- All the layers are preferably deposited by cathode sputtering assisted by a magnetic field.
- it could be obtained by thermal evaporation or assisted by an electron flow, by laser ablation, by CVD, possibly assisted by plasma or by microwave, or by a technique at atmospheric pressure, in particular by deposition of layers by sol-gel synthesis, in particular of the dipped, spray-coating or laminar coating type.
- the temporary protective layer may have a thickness of between 5 ⁇ m and 20 ⁇ m, preferably between 5 ⁇ m and 15 ⁇ m and is ideally equal to 15 ⁇ m.
- the temporary protective layer has a basis weight of between 5 and 50 g / m 2 , preferably between 10 and 30 g / m 2 .
- the temporary protective layer comprises an organic polymer matrix which can be obtained from a liquid polymerizable composition comprising (meth) acrylate compounds.
- the (meth) acrylate compounds which have reacted with each other can represent at least 90% by mass of the mass of the temporary protective layer.
- (meth) acrylate is meant an acrylate or a methacrylate.
- the (meth) acrylate compounds used according to the invention can be chosen from monofunctional and polyfunctional (meth) acrylates such as mono-, di-, tri- and poly-functional (meth) acrylates.
- monomers are: - monofunctional (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, n- or ter-butyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth ) acrylate, benzyl (meth) acrylate, 2- ethoxyethyl (meth) acrylate, phenyloxyethyl (meth) acrylate, hydroxyethylacrylate, hydroxypropyl (meth) acrylate, vinyl (meth) acrylate caprolactone acrylate, isobornyl methacrylate, lau
- - difunctional (meth) acrylates such as 1, 4-butanediol di (meth) acrylate, ethylene dimethacrylate, 1, 6-hexandiol di (meth) acrylate, bisphenol A di (meth) acrylate, trimethylolpropane diacrylate, triethylene glycol diacrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, tricyclodecane dimethanol diacrylate,
- trifunctional (meth) acrylates such as trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, ethoxylated trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, tripropylene glycol triacrylate,
- - (meth) acrylates of higher functionality such as pentaerythritol tetra (meth) acrylate, ditrimethylpropane tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate or hexa (meth) acrylate.
- the temporary protective layer does not include any mineral filling material such as fillers or pigments.
- the temporary protective layer also does not include additives that cannot be removed during the heat treatment, such as organic compounds comprising silicon of the siloxane type.
- the liquid composition of the temporary protective layer has the following characteristics:
- the liquid composition comprises less than 20% by mass of solvent relative to the total mass of the liquid composition
- the liquid composition comprises less than 10% by mass of solvent relative to the total mass of the liquid composition
- liquid composition is solvent-free
- the liquid composition has a viscosity measured at 25 ° C using an Anton Paar type rheometer MCR92 model with a flat cone geometry: • at least 0.05 Pa.s, at least 0.08 Pa.s, at least 0.1 Pa.s, at least 0.50 Pa.s,
- the liquid composition comprises at least one polymerization initiator, preferably a photoinitiator,
- the polymerization initiator represents from 0.1 to 20%, or from 1 to 15%, preferably from 5 to 15% and better from 8 to 12% by mass of the total mass of the (meth) acrylate compounds,
- the liquid composition further comprises at least one additive chosen from plasticizers, absorbers, release agents, heat and / or light stabilizers, thickening agents or surface modifiers,
- the sum of all the additives is between 0 and 5% by mass of the mass of the liquid composition
- liquid composition comprises:
- liquid composition comprises:
- the liquid composition comprises by mass relative to the total mass of the (meth) acrylate compounds:
- the polymerization initiators are not considered to be additives.
- the liquid composition can be applied at room temperature by any known means and in particular by roller coating, by sprinkling, by curtain coating, or by spraying.
- the liquid composition is preferably applied by roller coating.
- the rate of deposition of the liquid composition can be between 1 and 90 m / min.
- the temporary protective layer can be hardened:
- UV crosslinking preferably in the open air and at room temperature or
- the liquid composition further comprises a polymerization initiator, the nature of which depends on the type of curing chosen. For example, in the event of thermal curing, initiators of the benzoyl peroxide type are used. In the event of curing by UV radiation, so-called photoinitiator initiators are used.
- the protection method according to the invention comprises a step of removing said temporary protective layer by a specific heat treatment combining both a temperature between 300 ° C and 500 ° C, preferably between 400 ° C and 500 °. C, more preferably between 400 ° C and 450 ° C, even more preferably between 400 ° C and 420 ° C and advantageously is equal to 410 ° C, and a period of between 180 s and 240 s, preferably between 200 s and 220 s, more preferably between 205 s and 215 s; without altering the properties of the electrochromic stack on which the protective layer was deposited.
- the step of removing the temporary protective layer by the heat treatment is followed by a step of wiping to using a cloth or washing, in order to completely remove the temporary protective layer previously deposited on the electrochromic stack.
- This temporary layer removal can therefore be carried out dry or wet, using an aqueous solution or a solvent.
- aqueous solution or a solvent may for example be water, in particular acidified water, for example using acetic acid, citric acid or any other acid.
- the solvent can also be an alcohol, for example ethanol, propanol or isopropanol. Washing can be done with or without the help of brushes.
- the invention also relates to a method of manufacturing insulating glazing.
- the method of manufacturing an insulating glazing comprises compared to the method of protecting a glass substrate coated with an electrochromic stack as described above:
- the first substrate being that on which the electrochromic stack is deposited.
- the two glass substrates are therefore joined to form an insulating glazing by means of a spacer.
- the two substrates can be laminated, in the sense that a laminating polymer is placed (in particular based on polyvinyl butyral, on a copolymer of ethylene and vinyl acetate - EVA- or still polyurethane) in contact between the first glass substrate coated with its stack and the second substrate.
- a laminating polymer in particular based on polyvinyl butyral, on a copolymer of ethylene and vinyl acetate - EVA- or still polyurethane
- the two substrates can alternatively be mounted in double glazing, in the sense that the second substrate is kept at a distance from the first, in general by means of a peripheral frame, thus leaving a gas layer between the two substrates.
- the gas is in particular argon.
- the electrochromic stack is placed between the two substrates.
- the temporary protective layer is deposited on a complete electrochromic stack, in particular during the process for manufacturing an insulating glazing, which allows handling, processing, treatment, transport, washing or storage. of the glass substrate coated with said electrochromic stack comprising numerous layers, and thus to avoid mechanical and / or chemical alterations of said stack during the various aforementioned operations.
- alterations on a complete electrochromic stack cause color defects, either punctual and extremely visible due to short-circuiting of the electrically conductive layers resulting in an absence of local color (“shorts”), or general non-uniformity of color. glazing at the scale of a few tens of cm or one meter.
- the temporary protective layer is then removed during the insulating glazing manufacturing process by a specific heat treatment: at a temperature between 300 ° C and 500 ° C, over a period ranging from 180 s to 240 s, without affecting the properties of the different layers of the electrochromic stack.
- all of the layers constituting the electrochromic stack according to the invention are deposited by sputtering assisted by a vacuum magnetic field.
- the substrates used below are glass substrates coated with an electrochromic stack (of size 1.5 m c 3 m, having current conducting bars separated by 1.5 m) successively provided:
- a temporary protective layer comprising an organic polymer matrix with a thickness equal to 15 ⁇ m is deposited on said electrochromic stack.
- the temporary protective layer used in the examples is a liquid composition produced using a mixture of oligomers and monomers comprising at least one acrylate function sold by the company Sartomer: CN9276: tetra-functional aliphatic urethane-acrylate oligomer ,
- SR351 trimethylolpropane triacrylate, tri-functional acrylate monomer
- SR833S tricyclodecane dimethanol diacrylate, di-functional acrylate monomer.
- the substrates are subjected to a heat treatment by means of a furnace of the Nabertherm or Northglass type at a temperature of 410 ° C. for a period of 210 s (Example 1, according to the invention), 150 s (Example 2, according to Comparative Example 1) and 360 s (Example 3, according to Comparative Example 2).
- the glazing is subdivided into partition of equal area and the average values of L * , a * and b * are determined for each partition (from the measurement on the complete glazing),
- the quantity DE is determined as the maximum value of the colorimetric differences between the partitions of the glazing after heat treatment.
- the term “removable or removed protective layer” is understood to mean, when it is observed on the last layer of the electrochromic stack that the protective layer is sufficiently degraded and its adhesion sufficiently weak so that it can be obtained. easily removed by wiping with a cloth or washing.
- the duration of the heat treatment is too short to allow the elimination of the protective polymer layer.
- the diffusion of lithium in the counter-electrode layer of the stack is probably not done adequately, thus leading to sub-optimal performance of the electrochromic stack.
- the electrochromic stack does not have good properties since Tint% T> 1%, Time to 5%> 900 s, and DE> 7.
- the duration of the heat treatment is long enough to remove the protective polymer layer.
- the properties of the electrochromic stack are altered, due in particular to the oxidation of lithium and the overoxidation of the last ITO layer (since Tint% T> 1%, Time to 5%> 900 s, Top TCO Rsq> 7 W and DE> 7).
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Laminated Bodies (AREA)
- Surface Treatment Of Glass (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1902628A FR3093720B1 (fr) | 2019-03-14 | 2019-03-14 | Procédé de protection d’un substrat en verre revêtu d’un empilement électrochrome et procédé de fabrication d’un vitrage isolant |
| PCT/EP2020/056988 WO2020183019A1 (fr) | 2019-03-14 | 2020-03-13 | Procede de protection d'un substrat en verre revetu d'un empilement electrochrome et procede de fabrication d'un vitrage isolant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3938332A1 true EP3938332A1 (fr) | 2022-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20709257.8A Pending EP3938332A1 (fr) | 2019-03-14 | 2020-03-13 | Procede de protection d'un substrat en verre revetu d'un empilement electrochrome et procede de fabrication d'un vitrage isolant |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12007658B2 (fr) |
| EP (1) | EP3938332A1 (fr) |
| JP (1) | JP2022523998A (fr) |
| CN (1) | CN113544104B (fr) |
| FR (1) | FR3093720B1 (fr) |
| TW (1) | TW202104130A (fr) |
| WO (1) | WO2020183019A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11623433B2 (en) | 2016-06-17 | 2023-04-11 | View, Inc. | Mitigating defects in an electrochromic device under a bus bar |
| CN120965128A (zh) * | 2025-08-05 | 2025-11-18 | 太仓京程新材料科技有限公司 | 一种低辐射钢化玻璃基材的临时层保护膜及其制备方法 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2601150B1 (fr) | 1986-07-04 | 1991-05-31 | Saint Gobain Vitrage | Vitrage a transmission variable du type electrochrome |
| FR2642890B1 (fr) | 1989-02-09 | 1991-04-12 | Saint Gobain Vitrage | Materiau colloide conducteur de cations alcalins et applications a titre d'electrolytes |
| FR2677800B1 (fr) | 1991-06-14 | 1993-08-20 | Saint Gobain Vitrage Int | Materiau solide conducteur ionique, a partir d'un polymere et d'un sel de cation alcalin, application comme electrolyte. |
| EP0532408A1 (fr) | 1991-09-13 | 1993-03-17 | Saint-Gobain Vitrage International | Polymère conducteur protonique, application en tant qu'électrolyte dans des dispositifs électrochimiques |
| FR2716457B1 (fr) | 1994-02-23 | 1996-05-24 | Saint Gobain Vitrage Int | Matériau électrolyte conducteur protonique. |
| FR2746934B1 (fr) | 1996-03-27 | 1998-05-07 | Saint Gobain Vitrage | Dispositif electrochimique |
| FR2753545B1 (fr) | 1996-09-18 | 1998-10-16 | Saint Gobain Vitrage | Dispositif electrochimique |
| US5995271A (en) * | 1997-10-07 | 1999-11-30 | Optical Coating Laboratory, Inc. | Protective coating materials for electrochromic devices |
| FR2791147B1 (fr) | 1999-03-19 | 2002-08-30 | Saint Gobain Vitrage | Dispositif electrochimique du type dispositif electrocommandable a proprietes optiques et/ou energetiques variables |
| US9723723B2 (en) * | 2009-03-31 | 2017-08-01 | View, Inc. | Temperable electrochromic devices |
| FR2963342B1 (fr) | 2010-07-27 | 2012-08-03 | Saint Gobain | Procede d'obtention d'un materiau comprenant un substrat muni d'un revetement |
| CN103353700B (zh) * | 2013-06-25 | 2016-01-27 | 中国南玻集团股份有限公司 | 电致变色玻璃、中空玻璃及其制备方法 |
| FR3009302B1 (fr) * | 2013-08-05 | 2018-01-12 | Saint-Gobain Glass France | Substrat portant un revetement fonctionnel et une couche de protection temporaire |
| CA2976279C (fr) * | 2014-03-07 | 2022-07-26 | Tsytex E-Coatings Inc. | Revetement protecteur temporaire et systeme d'elimination |
| FR3031197B1 (fr) * | 2014-12-31 | 2017-06-16 | Saint Gobain | Procede de traitement thermique rapide d'un empilement electrochrome tout solide complet |
| CN120607371A (zh) * | 2016-06-01 | 2025-09-09 | 唯景操作公司 | 用于电致变色器件制造的牺牲层 |
| FR3056207B1 (fr) * | 2016-09-19 | 2018-09-07 | Saint Gobain | Vitrage muni d'une couche de protection temporaire et d'un logo ou motif imprime |
-
2019
- 2019-03-14 FR FR1902628A patent/FR3093720B1/fr not_active Expired - Fee Related
-
2020
- 2020-03-13 CN CN202080018683.7A patent/CN113544104B/zh not_active Expired - Fee Related
- 2020-03-13 WO PCT/EP2020/056988 patent/WO2020183019A1/fr not_active Ceased
- 2020-03-13 US US17/436,428 patent/US12007658B2/en active Active
- 2020-03-13 JP JP2021552701A patent/JP2022523998A/ja active Pending
- 2020-03-13 EP EP20709257.8A patent/EP3938332A1/fr active Pending
- 2020-03-16 TW TW109108608A patent/TW202104130A/zh unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US20220163862A1 (en) | 2022-05-26 |
| TW202104130A (zh) | 2021-02-01 |
| WO2020183019A1 (fr) | 2020-09-17 |
| FR3093720B1 (fr) | 2021-06-18 |
| US12007658B2 (en) | 2024-06-11 |
| CN113544104B (zh) | 2023-07-14 |
| CN113544104A (zh) | 2021-10-22 |
| JP2022523998A (ja) | 2022-04-27 |
| FR3093720A1 (fr) | 2020-09-18 |
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