WO2021004873A1 - Glazing unit with a double layer of tin for solar control - Google Patents
Glazing unit with a double layer of tin for solar control Download PDFInfo
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- WO2021004873A1 WO2021004873A1 PCT/EP2020/068626 EP2020068626W WO2021004873A1 WO 2021004873 A1 WO2021004873 A1 WO 2021004873A1 EP 2020068626 W EP2020068626 W EP 2020068626W WO 2021004873 A1 WO2021004873 A1 WO 2021004873A1
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- thickness
- layer
- module
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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
- C03C17/3429—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 at least one of the coatings being a non-oxide coating
- C03C17/3435—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 at least one of the coatings being a non-oxide coating comprising a nitride, oxynitride, boronitride or carbonitride
Definitions
- TITLE DOUBLE-LAYER TIN GLASS FOR SOLAR CONTROL
- the invention relates to so-called solar control insulating glazing, provided with so-called functional thin film stacks, that is to say acting on solar and / or thermal radiation essentially by reflection and / or absorption of near infrared radiation ( solar) or distant (thermal).
- solar control glazing can also be used in vehicle glazing, such as side glasses, car roofs, rear glasses.
- the term “functional” or even “active” layer is understood to mean the layers of the stack which give the stack most of its thermal insulation properties. Most often, the thin-film stacks fitted to the glazing give it substantially improved insulation properties, very essentially through the intrinsic properties of said active layers. Said layers act on the flow of thermal infrared radiation passing through said glazing, as opposed to the other layers, generally made of dielectric material and most often having the main function of chemical or mechanical protection of said functional layers.
- dielectric material is meant a material whose massive shape and devoid of impurities has a high resistivity, in particular a resistivity initially greater than 10 10 ohms. meters (Q .m).
- Such glazing provided with stacks of thin layers act on the incident IR radiation either primarily by absorption of said radiation by the functional layer or layers, or primarily by reflection by these same layers.
- the term “sunscreen” therefore means the ability of the glazing to limit the energy flow, in particular the solar infrared radiation (1RS) passing through it from the outside to the inside of the dwelling or the passenger compartment. .
- thermal insulator a glazing provided with at least one functional layer giving it reduced energy loss, said layer exhibiting IR radiation reflection properties of between 5 and 50 micrometers.
- the functional layers used in this function have a high reflection coefficient of IR radiation and are said to be low-emissive (or low-e according to the English term).
- the solar factor g is equal to the ratio of the energy passing through the glazing (that is to say entering the room) and of the incident solar energy. More particularly, it corresponds to the sum of the flux transmitted directly through the glazing and of the flux absorbed by the glazing (including therein the stacks of layers possibly present on one of its surfaces) then possibly re-emitted towards the interior (the local).
- a factor g of the order of 30 to 35% fulfills such an insulating function.
- the most efficient stacks marketed at the present time to solve the previous problems and deposited by magnetron sputtering techniques incorporate a metallic layer of the Silver type operating essentially on the mode of reflection of a major part of the IR (infrared) radiation. incident. These stacks are thus used mainly as glazing of the low emissive type (or low-e in English) for the thermal insulation of buildings. These layers are however very sensitive to humidity and are therefore exclusively used in double glazing, on face 2 or 3 thereof, to be protected from humidity.
- the stacks according to the invention do not include such layers of the silver type, or of the gold or platinum or even copper type. More generally, the stacks according to the invention do not contain such precious metals, or else in very negligible quantities, in particular in the form of inevitable impurities.
- the coatings when they are associated with the glass substrate used (in particular with a clear glass), the coatings must furthermore also be aesthetically pleasing, that is to say that the glazing provided with its stack must have a colorimetry, both in transmission and in internal reflection, sufficiently neutral not to inconvenience the inhabitants of the building or the passengers of the vehicle in the CIE LAB colorimetry system (L *, a *, b *).
- the values of the coefficient a * of these two parameters must be as close as possible to 0 for the color to be considered sufficiently neutral.
- the coatings are conventionally deposited by deposition techniques of the vacuum sputtering type assisted by a magnetic field of a cathode of the material or of a precursor of the material to be deposited, often called magnetron sputtering technique in the field.
- Such a technique is conventionally used today, in particular when the coating to be deposited consists of a more complex stack of successive layers of thicknesses of a few nanometers or a few tens of nanometers.
- Patent application WO2018 / 129135 describes a stack of layers comprising successively the following sequence of layers: Si3N4 / TiN / Si3N4 / TiN / SÎ3N4. It is indicated in this publication that such a sequence, in which the functional TiN layers are encapsulated by layers of dielectrics based on silicon nitride, makes it possible to obtain a stack whose color is substantially neutral on the glass side (exterior). .
- glazing that provides improved visual comfort is currently in demand, both in the construction sector (as building glazing) and in the automotive sector (as side glazing, rear window glazing or even as glazed roof).
- One of the objects of the present invention to meet such a demand is to provide thermal insulating glass articles whose colors are relatively neutral in transmission and in internal reflection and whose color in external reflection can be easily adjusted during their production. .
- the previous problems have been solved by glass articles as described now:
- a glass article with sunscreen properties according to the invention comprises at least one glass substrate provided with a stack of layers, in which the stack comprises successively from the surface of said substrate:
- a first TNi layer comprising titanium nitride and preferably based on titanium nitride, with a thickness of between 1 nanometers and 50 nanometers, preferably between 1 and 30 nanometers, more preferably between 2 and 25 nm,
- a first module Mi consisting of a layer based on a dielectric material of thickness ei or by a set of layers based on dielectric materials with a cumulative thickness ei of between 1 and 100 nm,
- a second TN2 layer comprising titanium nitride and preferably based on titanium nitride, with a thickness between 1 nanometers and 50 nanometers, preferably between 5 and 40 nanometers, more preferably between 10 and 40 nm,
- a second module M2 formed by a layer based on a dielectric material of thickness e ⁇ or by a set of layers based on dielectric materials with a cumulative thickness e ⁇ between 1 and 120 nm,
- the first module M1 is in contact with the first layer TNi and the second layer TN2 .
- the second module M2 is in contact with the second layer TN2 .
- the module (s) M1 and / or M2 are based on materials chosen from a silicon nitride, an aluminum nitride, a tin oxide, a mixed oxide of zinc and tin, a silicon oxide, a titanium oxide, a silicon oxynitride,
- the module (s) Mi and / or M2 are based on materials chosen from a silicon nitride, an aluminum nitride, a tin oxide, a mixed oxide of zinc and tin.
- the M2 module is based on materials chosen from among a silicon nitride, an aluminum nitride, a tin oxide, a mixed oxide of zinc and tin, a titanium oxide, preferably IV is based on nitride silicon, aluminum nitride or mixtures thereof.
- the M2 module is based on materials chosen from among a silicon nitride, an aluminum nitride, a tin oxide, a mixed oxide of zinc and tin, a titanium oxide, preferably IV is based on nitride silicon, aluminum nitride or mixtures thereof.
- Mi and M2 are unique layers.
- Mi or M2 include silicon nitride.
- Mi and M2 include silicon nitride.
- Mi or M2 are based on silicon nitride.
- Mi and M2 are based on silicon nitride.
- the stack consists of the following sequence of layers, starting from the surface of the substrate: layer based on titanium nitride / layer based on silicon nitride / layer based on titanium nitride / layer based on titanium nitride silicon / optionally at least one protective layer preferably chosen from oxides of titanium, zirconium or a mixture of titanium and zirconium.
- the thickness ei of the first module M1 is between 15 nm and 100 nanometers, limits included.
- the thickness e ⁇ of the second module M2 is between 10 nm and 100 nanometers, limits included.
- the thickness of the layer TN2 is greater than the thickness of the layer TNi.
- the thickness of the layer TN1 is greater than the thickness of the layer TN2 .
- the thickness of the TN1 layer is between 5 and 25 nm, preferably between 10 and 20 nm,
- the thickness ei of the module M1 is between 20 and 45 nm, preferably between 25 and 40 nm
- - the thickness of the TN2 layer is between 5 and 30 nm, preferably between 10 and 20 nm
- the thickness e2du module M2 is between 5 and 30 nm, preferably between 5 and 20 nm.
- the thickness of the TN1 layer is between 5 and 25 nm, preferably between 10 and 20 nm,
- the thickness ei of the module M1 is between 40 and 65 nm, preferably between 45 and 60 nm,
- the thickness of the TN2 layer is between 5 and 30 nm, preferably between 10 and 20 nm,
- the thickness e ⁇ of the module M2 is between 70 and 110 nm, preferably between 80 and 100 nm.
- the thickness of the TN1 layer is between 10 and 30 nm, preferably between 10 and 25 nm,
- the thickness ei of the module M1 is between 40 and 65 nm, preferably between 45 and 60 nm,
- the thickness of the TN2 layer is between 10 and 30 nm, preferably between 15 and 25 nm,
- the thickness ei of the module M2 is between 20 and 45 nm, preferably between 25 and 40 nm.
- the cumulative thickness TN1 + TN2 of the first layer based on titanium nitride and second layer based on titanium nitride is less than 60 nm, preferably is less than 55 nm and more preferably is between 25 and 45 nm .
- the coating does not contain a metallic layer, in particular based on silver or gold or copper.
- the glass substrate on which the stack is deposited is made of clear glass. Without departing from the scope of the invention, it can also be envisaged to deposit the stack on a tinted glass substrate.
- the glass article comprises two glass substrates assembled by a thermoplastic sheet, in particular of polyvinyl butyral PVB, at least one of said substrates being provided with said stack of layers, said stack being preferably arranged on a face of a substrate facing the inside of said glazing, or else in contact with the thermoplastic sheet.
- the preceding glass article comprises a first glass substrate, preferably colored in its mass, linked to a second substrate by an intermediate thermoplastic sheet, in particular in PVB, said second substrate being made of clear glass and provided with said stack of layers arranged in preferably on its face exposed towards the outside of said article.
- colored in its mass is meant that the substrate comprises in its glass composition elements intended to give it a coloring (ie different from that of a so-called "clear” glass), in particular elements such as cobalt, iron. , selenium, or even chromium, which may also aim to reduce its light transmission.
- the thickness of the TNi layer is between 10 and 30 nm, preferably between 15 and 25 nm,
- the thickness ei of the module Mi is between 10 and 35 nm, preferably between 15 and 25 nm,
- the thickness of the TN2 layer is between 5 and 30 nm, preferably between 10 and 20 nm,
- the thickness e ⁇ of the module M2 is between 50 and 90 nm, preferably between 60 and 80 nm.
- the thickness of the layer TN1 is between 1 and 20 nm, preferably between 1 and 10 nm, more preferably between 2 and 8 nm, - the thickness ei of the module M1 is between 50 and 80 nm, preferably between 55 and 75 nm,
- the thickness of the TN2 layer is between 20 and 50 nm, preferably between 25 and 45 nm,
- the thickness e ⁇ of the module M2 is between 40 and 80 nm, preferably between 55 and 75 nm.
- the thickness of the TN1 layer is between 10 and 40 nm, preferably between 15 and 25 nm, the thickness ei of the module Mi is between 60 and 100 nm, preferably between 75 and 95 nm,
- the thickness of the TN2 layer is between 10 and 30 nm, preferably between 15 and 25 nm,
- the thickness e ⁇ of the module M2 is between 30 and 60 nm, preferably between 35 and 55 nm.
- the titanium nitride layers according to the invention are based on titanium nitride or even more preferably consist essentially of titanium nitride.
- a titanium nitride-based layer comprises for example at least 50% by weight of titanium nitride, or even more than 60% by weight of titanium nitride, or even more than 80% by weight, or even more than 90% by weight of titanium nitride. titanium.
- the titanium nitride according to the invention is not necessarily stoichiometric (Ti / N atomic ratio of 1) but can be over- or substoichiometric. According to an advantageous embodiment, the N / Ti ratio is between 1 and 1, 2. Also, the titanium nitride according to the invention can comprise a minor amount of oxygen, for example between 1 and 10 mol% of oxygen, in particular between 1 and 5 mol% of oxygen.
- the titanium nitride layers according to the invention correspond to the general formula TiN x O y , in which 1.00 ⁇ x ⁇ 1. 20 and in which 0.01 ⁇ y ⁇ 0.10.
- the dielectric materials once deposited in thin layers, can however comprise additional elements which substantially increase their electrical conductivity, useful for example for improving the efficiency of sputtering of the precursor material constituting the magnetron target.
- the dielectric layers of the modules M1, M2 according to the invention can be layers based on a material chosen from a silicon nitride, an aluminum nitride, a tin oxide, a mixed oxide of zinc or of tin. , a silicon oxide, a titanium oxide, a silicon oxynitride, preferably the modules M1 and M2 consist of a single layer and this layer is based on silicon nitride.
- a material based on silicon nitride, tin oxide, mixed oxide of zinc and tin, silicon oxide, titanium oxide, silicon oxynitride is for example a material consisting of predominantly, and preferably essentially, of such a compound but may also nevertheless contain other minority elements, in particular in substitution for cations, for example to promote their deposition in the form of thin layers by the usual magnetron sputtering techniques as described above.
- titanium oxide layers may comprise, in substitution for titanium, other minority metal cations such as zirconium, without departing from the scope of the present invention.
- the glazing according to the invention can be a single glazing in which the stack of thin layers being preferably arranged on face 2 of the single glazing by numbering the faces of the substrate from the outside to the inside of the building or the passenger compartment which 'he team.
- the glazing according to the invention can be a laminated glazing, comprising two glass substrates assembled by a thermoplastic sheet, in particular a polyvinyl butyral or PVB sheet, said glazing being provided with a stack of layers as described above.
- the stack is deposited on the side of the substrate facing the interior of the laminated structure, in particular on side 2 of the glazing, and more preferably it is in contact with the thermoplastic sheet.
- it can be placed on the inner face of the laminated glazing, ie on face 4 of the glazing, the faces being numbered conventionally from 1 to 4 from the outside to the inside of the glazing.
- the substrates described above can obviously be thermally hardened and / or curved.
- a method of manufacturing an article according to the invention comprises for example at least the following steps:
- a glass substrate is introduced into a cathode sputtering device, - in a first compartment, a titanium target is sputtered by means of a plasma generated from a gas comprising nitrogen, preferably mixed with a gas rare such as argon,
- a titanium target is sprayed by means of a plasma generated from a gas comprising nitrogen, preferably mixed with a rare gas such as argon,
- At least one overlay of a dielectric material is deposited.
- over-layer reference is made in the present description to the respective position of said layers with respect to the functional layer or layers in the stack, said stack being supported by the glass substrate.
- the overlay is the outermost layer of the stack, facing away from the substrate.
- intermediate layer denotes the layer or layers arranged between two functional layers.
- the term “thickness of a layer” is understood to mean the real geometric thickness of the layer, as it can be measured in particular by conventional techniques of electron microscopy or the like.
- the glass substrate is successively covered with a stack of layers comprising two functional layers based on titanium nitride, an intermediate layer (first layer Mi between the two layers of TiN) based on silicon nitride and one on -layer (second layer M2) also based on silicon nitride (denoted for convenience S13N4 hereinafter even if the real stoichiometry of the layer is not necessarily this).
- All the substrates are in 4 mm thick Planilux® clear glass marketed by Saint-Gobain Glass France. All the layers are deposited in a known manner by cathode sputtering assisted by a magnetic field (often called a magnetron).
- the various successive layers are deposited in successive dedicated compartments of the cathode sputtering device, each compartment being provided with a specific metal target in Si, Ti, chosen for the deposition of a specific layer of the stack.
- the silicon nitride layers are deposited in compartments of the device from a metallic silicon target (doped with 8 wt% aluminum), in a reactive atmosphere containing nitrogen.
- the silicon nitride layers therefore also contain aluminum.
- the titanium nitride layers are deposited in other compartments of the device from a metallic pure titanium target in a reactive atmosphere containing nitrogen and argon.
- the measurements are carried out in accordance with the European standards ISO 9050 and NF EN410 mentioned above. Specifically, the light transmission TL, the light reflection from the Rin t stack side and the light reflection from the of the uncoated glass face R ext are measured between 380 and 780 nm according to the illuminant D65.
- the parameter a * ext and b * ext (glass side in external reflection, that is to say on the face of the glass which has remained bare) is also measured according to the colorimetry model (L, a *, b *).
- the thermal insulation properties of the glazing are evaluated by determining the solar factor g, under the conditions described in the previous standards.
- Examples 1 to 3 are examples in accordance with the present invention. For these three examples, a light transmission of the order of 30% is observed, and a relatively neutral or slightly bluish color in interior reflection, considered pleasant.
- the solar factor g is of the order of 30 to 35%, which reflects good thermal insulation properties of the glazing.
- the glazing according to Example 1 has a neutral colorimetry in exterior reflection (on the side of the uncoated glazing).
- the glazing according to Example 2 which has the same sequence of layers as Example 1 but different thicknesses of the constituent layers of the stack, has a pronounced blue colorimetry in external reflection.
- the glazing according to Example 3 for further modified thicknesses, exhibits a pronounced bronze colorimetry in external reflection.
- the glazings according to the invention thus comprise stacks whose colors in external reflection are adjustable, that is to say stacks whose color in external reflection is different, on the basis of the same sequence of successive layers.
- the glass substrate fitted with its stack is assembled with another 4 mm thick clear glass substrate from Planilux®.
- the assembly is obtained by means of an untinted polyvinyl butyral (PVB) sheet 0.38 mm thick, so that the stack of layers is found on face 2 of the laminated glazing, the faces being numbered 1 to 4 from the outer surface of the glazing, in a manner conventional in the field.
- PVB polyvinyl butyral
- the glazing has a color that is substantially neutral in transmission as well as in reflection interior (stacking side) and an exterior color adaptable to the desired needs.
- thermoforming in monolithic version as in laminated version, it is possible according to the invention to obtain glazing that is substantially neutral in transmission as in internal reflection and whose color in external reflection can be adjusted, on the basis of the same stack, by the simple variation of the thicknesses of successive layers of said stack.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
- Laminated Bodies (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112021026130A BR112021026130A2 (en) | 2019-07-05 | 2020-07-02 | Glass with double layer of tin for solar control |
MX2022000258A MX2022000258A (en) | 2019-07-05 | 2020-07-02 | Glazing unit with a double layer of tin for solar control. |
CONC2022/0000005A CO2022000005A2 (en) | 2019-07-05 | 2022-01-03 | Glass unit with a double layer of tin for solar control |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1907559A FR3098215B1 (en) | 2019-07-05 | 2019-07-05 | DOUBLE LAYER TIN GLAZING FOR SOLAR CONTROL |
FRFR1907559 | 2019-07-05 |
Publications (1)
Publication Number | Publication Date |
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WO2021004873A1 true WO2021004873A1 (en) | 2021-01-14 |
Family
ID=68138501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2020/068626 WO2021004873A1 (en) | 2019-07-05 | 2020-07-02 | Glazing unit with a double layer of tin for solar control |
Country Status (5)
Country | Link |
---|---|
BR (1) | BR112021026130A2 (en) |
CO (1) | CO2022000005A2 (en) |
FR (1) | FR3098215B1 (en) |
MX (1) | MX2022000258A (en) |
WO (1) | WO2021004873A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5091244A (en) * | 1990-08-10 | 1992-02-25 | Viratec Thin Films, Inc. | Electrically-conductive, light-attenuating antireflection coating |
GB2344600A (en) * | 1998-12-08 | 2000-06-14 | Sony Corp | Anti-reflection film and display device |
US20090047466A1 (en) * | 2007-08-14 | 2009-02-19 | German John R | Solar control low-emissivity coatings |
US20160002100A1 (en) * | 2013-02-20 | 2016-01-07 | Saint-Gobain Glass France | Pane with thermal radiation reflecting coating |
US20180186691A1 (en) * | 2017-01-05 | 2018-07-05 | Guardian Glass, LLC | Heat treatable coated article having titanium nitride based ir reflecting layer(s) |
-
2019
- 2019-07-05 FR FR1907559A patent/FR3098215B1/en active Active
-
2020
- 2020-07-02 WO PCT/EP2020/068626 patent/WO2021004873A1/en active Application Filing
- 2020-07-02 MX MX2022000258A patent/MX2022000258A/en unknown
- 2020-07-02 BR BR112021026130A patent/BR112021026130A2/en unknown
-
2022
- 2022-01-03 CO CONC2022/0000005A patent/CO2022000005A2/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5091244A (en) * | 1990-08-10 | 1992-02-25 | Viratec Thin Films, Inc. | Electrically-conductive, light-attenuating antireflection coating |
GB2344600A (en) * | 1998-12-08 | 2000-06-14 | Sony Corp | Anti-reflection film and display device |
US20090047466A1 (en) * | 2007-08-14 | 2009-02-19 | German John R | Solar control low-emissivity coatings |
US20160002100A1 (en) * | 2013-02-20 | 2016-01-07 | Saint-Gobain Glass France | Pane with thermal radiation reflecting coating |
US20180186691A1 (en) * | 2017-01-05 | 2018-07-05 | Guardian Glass, LLC | Heat treatable coated article having titanium nitride based ir reflecting layer(s) |
WO2018129135A1 (en) | 2017-01-05 | 2018-07-12 | Guardian Glass, LLC | Heat treatable coated article having titanium nitride based ir reflecting layer(s) |
Also Published As
Publication number | Publication date |
---|---|
MX2022000258A (en) | 2022-02-03 |
FR3098215B1 (en) | 2021-12-31 |
FR3098215A1 (en) | 2021-01-08 |
CO2022000005A2 (en) | 2022-04-08 |
BR112021026130A2 (en) | 2022-02-08 |
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