EP4135978A1 - Vitrage de véhicule à revêtement pare-soleil - Google Patents

Vitrage de véhicule à revêtement pare-soleil

Info

Publication number
EP4135978A1
EP4135978A1 EP21715930.0A EP21715930A EP4135978A1 EP 4135978 A1 EP4135978 A1 EP 4135978A1 EP 21715930 A EP21715930 A EP 21715930A EP 4135978 A1 EP4135978 A1 EP 4135978A1
Authority
EP
European Patent Office
Prior art keywords
pane
vehicle glazing
vehicle
curved
sun protection
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
Application number
EP21715930.0A
Other languages
German (de)
English (en)
Inventor
Julie RUFF
Jan Hagen
Robert Besler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP4135978A1 publication Critical patent/EP4135978A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/007—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
    • 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
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
    • C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
    • 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
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
    • 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
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/006—Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
    • 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
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • 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
    • C03C2217/00—Coatings on glass
    • C03C2217/40—Coatings comprising at least one inhomogeneous layer
    • C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
    • C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
    • C03C2217/47—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase consisting of a specific material
    • C03C2217/475—Inorganic materials
    • 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
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings
    • C03C2217/74—UV-absorbing 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
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • C03C2218/112—Deposition methods from solutions or suspensions by spraying
    • 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
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • C03C2218/118—Deposition methods from solutions or suspensions by roller-coating

Definitions

  • the invention relates to vehicle glazing with a sun protection coating, a method for its production and its use.
  • Sun protection glazing is glazing that is permeable to sunlight in the visible (VIS) spectral range (400 nm to 800 nm) and at the same time reduces the heat input from radiation in the near infrared (IR) range (800 nm -2500 nm). Materials with high absorption in the near IR range, which at the same time have high transmission in the visible spectral range (TL), are therefore particularly suitable as sun protection glazing.
  • Sun protection glazing that is to be used as a windshield or front side window in the automotive sector requires a TL value according to light type A of more than 70%.
  • solar control glazing has the advantage that it greatly reduces radiation in the near ultraviolet (UV) range (300 nm - 400 nm). This UV radiation is considered harmful and can, for example, increase the risk of skin cancer if one is exposed to it for a long time.
  • UV near ultraviolet
  • Today's sun protection glazing for motor vehicles is mainly based on silver coatings that are applied using magnetron processes.
  • Complex electrically conductive coatings for windshields are also known which are used as IR reflective coatings to reduce the heating of the vehicle interior and thereby improve thermal comfort.
  • the coatings can also be used as heatable coatings by connecting them to a voltage source so that a current flows through the coating.
  • Suitable coatings contain conductive, metallic layers, in particular based on silver. Since these layers are susceptible to corrosion, it is customary to apply them to the surface of the outer pane or the inner pane facing the intermediate layer, so that they have no contact with the atmosphere.
  • Silver-containing transparent coatings are known, for example, from W003 / 024155, US2007 / 0082219A1, US2007 / 0020465A1, WO2013 / 104438 or WO2013 / 104439.
  • Another disadvantage of such coatings is the shielding of radio frequency (HF) signals, such as mobile phone frequencies, due to the conductive silver layer.
  • HF radio frequency
  • the silver layers are sensitive to mechanical damage such as scratches when they are placed on an exposed surface of a vehicle. Coatings that are applied to a surface facing the interior are touched, for example, by vehicle occupants and can thus be scratched or soiled. The surfaces facing the external environment are also stressed by the weather and various types of soiling.
  • Sun protection coatings for exposed surfaces with high permeability for high-frequency signals have gained in importance and are of great interest in particular for the automotive sector.
  • Another disadvantage of sun protection coatings in the form of silver-based magnetron layers is the low transparency for IR radiation. This is important for speed controls where the IR camera used cannot recognize the driver due to the high level of reflection. As this is required by law in some countries, the use of these coatings is restricted by region.
  • WO 2017161423 A1 discloses a substrate with a functional ultra-thin coating with tungstate nanodots.
  • the functional coating is photocatalytically active and has antimicrobial properties.
  • the functional coating is ultra-thin, so multiple layers are thinner than 30 nm.
  • Applications in the automotive sector are not disclosed.
  • EP 2878442 A1 discloses the use of an intermediate layer with a heat-shielding coating in a composite pane, which can also be used in the automotive sector. However, a heat-shielding coating is used here as part of a film.
  • the invention is based on the object of providing an improved and particularly easy to manufacture vehicle glazing with a sun protection coating which at the same time has a high permeability for high-frequency signals, a high absorption of IR radiation and a low reflection of IR radiation.
  • the vehicle glazing comprises a curved pane with a sun protection coating comprising cesium tungstate nanoparticles.
  • the cesium tungstate nanoparticles are arranged directly on the curved disk. Directly arranged means that the cesium tungstate nanoparticles are applied directly to the curved pane, that is to say that they are not applied to the pane as part of a previously prepared polymeric film.
  • the direct application of the nanoparticles has the advantage that the adhesion of the nanoparticles to the pane is particularly good compared to a polymeric film that is stuck on separately and can come off again over time.
  • material incompatibilities between the layers can be triggered by an additional adhesive.
  • the uniform application of prepared foils on curved panes is technically demanding.
  • the sun protection coating arranged directly on the pane is that it is particularly easy to manufacture, since the sun protection coating can be applied directly to the curved pane and can thus be distributed particularly evenly. This is easier to control than when it is used in or on a separately prepared and glued polymeric intermediate layer.
  • vehicle glazing according to the invention has a low reflection in the IR range, so that speed control with IR cameras is possible.
  • the vehicle glazing has good shielding against harmful UV radiation and absorbs heat radiation in the near IR range.
  • the discontinuous nanoparticle layer the vehicle glazing has a high level of permeability for high frequencies from cell phones, for example, which is a great advantage over conventional metal-based magnetron layers.
  • the optical requirements for a windshield can also be met, in particular with regard to transparency and coloring.
  • the pane is bent in one or more directions of the space, as is customary for motor vehicle windows, with typical radii of curvature in the range from about 10 cm to about 40 m.
  • the disc cannot be pre-stressed, partially pre-stressed or pre-stressed.
  • the disc can be thermally or chemically prestressed.
  • the vehicle glazing is provided in a window opening of a vehicle to separate the interior from the external environment.
  • the sun protection coating is preferably transparent.
  • a transparent coating is understood to mean a coating which has an average transmission in the visible spectral range of at least 70%, preferably of at least 71%, further preferably of at least 75%, particularly preferably of at least 80%, i.e. which does not see through the pane significantly restricts.
  • the pane preferably has an average transmission in the visible spectral range between 70% and 85%. In this area, the requirements for a windshield are met and, at the same time, good protection is achieved by the sun protection coating.
  • the sun protection coating additionally contains indium oxide nanoparticles.
  • the sun protection coating is therefore advantageously more color-neutral.
  • the vehicle glazing is single-pane safety glazing.
  • Toughened safety glazing is a single pane of glass which is thermally or chemically toughened in order to influence the stability and the size of the splinters if the pane breaks.
  • Single-pane safety glazing is particularly common as a side window, rear window or roof window.
  • the vehicle glazing is double glazing comprising a second pane that overlaps with the curved pane a circumferential spacer is tightly connected. Double glazing is particularly preferred in trains or buses.
  • the vehicle glazing is a composite pane.
  • the curved pane is connected to a second pane via a thermoplastic intermediate layer.
  • the composite pane comprises an outer pane and an inner pane, which are connected to one another via a thermoplastic intermediate layer.
  • the term inner pane denotes the pane of the composite pane facing the interior (in particular the vehicle interior).
  • the outer pane is the term used to describe the pane facing the external environment.
  • the composite pane is preferably a vehicle windshield (in particular the windshield of a motor vehicle, for example a passenger or truck).
  • the vehicle glazing is a composite pane and the sun protection coating is arranged on a surface of the vehicle glazing facing the intermediate layer. This protects the sun protection coating from mechanical damage.
  • the sun protection coating is arranged directly on the surface of the curved pane facing the intermediate layer or on the surface of the second pane facing the intermediate layer.
  • the curved pane is particularly preferably the outer pane and the sun protection coating is arranged on the surface of the outer pane facing the intermediate layer. This arrangement is particularly advantageous from a thermal point of view, since the heat is absorbed as close as possible to the exposed outside glass surface. This makes it easier for the heat to be dissipated again by convection, for example when the vehicle is moving.
  • the vehicle glazing has an interior exposed surface and an exterior exposed surface.
  • Exposed surface refers to the surfaces of the vehicle glazing that are exposed and are therefore in contact with external influences. In the case of single-pane vehicle glazing, these are the two surfaces of the one curved pane EI and E II the thermoplastic intermediate layer.
  • the exposed outside surface denotes that main surface which is provided for this in the installation position of the external environment to be facing.
  • the exposed interior-side surface denotes that main surface which is intended to face the interior in the installed position.
  • the sun protection coating is arranged on an exposed surface of the vehicle glazing.
  • the sun protection coating is arranged either on the exposed surface on the inside, which faces the passenger compartment in the installed position, or is arranged on the exposed surface on the outside, which faces the external environment in the installed position.
  • the advantage of an arrangement on an exposed surface of the vehicle glazing is that the vehicle glazing can first be produced in a finished manner, that is to say bent, pre-stressed and optionally laminated, and then the sun protection coating can be applied. In this way, the sun protection coating is not impaired during the processes described.
  • the sun protection coating is preferably arranged on the exposed surface on the interior side. Thus, it is not exposed to the weather and mechanical influences from the outside, but only to the stress of vehicle occupants on the interior side.
  • the arrangement of the sun protection coating on an exposed surface in the case of fixed panes is particularly preferred. These are, for example, a fixed side window and a roof window without sliding function, as the sun protection coating is then less scratched when the window is opened.
  • the sun protection coating is preferably arranged on the surface on the inside, since the coating is not impaired in this way when a windshield wiper is used.
  • a scratch protection layer (hard coat) is arranged over the sun protection coating.
  • the scratch protection layer protects the sun protection coating underneath from scratches and the weather.
  • Thermally curing or UV-curing lacquer systems based on polysiloxanes, polyacrylates, polymethacrylates and / or polyurethanes are preferably used.
  • the scratch protection layer can have one or more separately applied layers.
  • first layer is arranged above or above a second layer, this means in the context of the invention that the first layer is further away from the substrate on which the Coating is applied, is located away than the second layer. If a first layer is arranged below a second layer, this means in the context of the invention that the second layer is arranged further away from the substrate than the first layer. If a first layer is arranged above or below a second layer, this does not necessarily mean in the context of the invention that the first and second layers are in direct contact with one another. One or more further layers can be arranged between the first and the second layer, unless this is explicitly excluded.
  • the sun protection coating has a thickness of 5 pm to 30 pm, preferably from 7 pm to 20 pm, particularly preferably from 10 pm to 15 pm. With these thicknesses, the layers are advantageously transparent and less prone to scratches.
  • the cesium tungstate nanoparticles are embedded in a polymer matrix. This is to be distinguished from embedding in a separate polymeric film, which was first produced separately from the pane and then glued onto a pane, with an additional layer of adhesive often being necessary.
  • the polymer matrix according to the invention with the cesium tungstate nanoparticles is produced by curing directly on the curved pane. This ensures excellent adhesion and at the same time avoids the technically demanding uniform bonding of polymeric films with curved panes.
  • At least 80% of the pane surface is preferably provided with the sun protection coating.
  • the coating is preferably applied over the entire surface of the pane with the exception of a circumferential edge area and optionally local areas which, as communication, sensor or camera windows, are intended to ensure the transmission of electromagnetic radiation through the laminated pane and are therefore not provided with the coating.
  • the circumferential uncoated edge area has a width of up to 20 cm, for example. It prevents direct contact between the coating and the surrounding atmosphere, so that the coating inside the laminated pane is protected from corrosion and damage.
  • such a seal which creates the adhesion between the window and the vehicle frame, can be arranged directly on the window. This improves the adhesion between the seal and the washer.
  • the sun protection coating is applied to the entire pane surface including the edge area.
  • the sun protection coating is hardly susceptible to corrosion due to the discontinuous distribution of the cesium tungstate nanoparticles, a separate configuration of the edge area is not absolutely necessary, which advantageously simplifies the manufacturing process.
  • the curved pane and the possibly present second pane are preferably made of glass, in particular soda-lime glass, which is common for window panes.
  • at least one of the panes can have a tint.
  • the panes can also be made of other types of glass (for example borosilicate glass, quartz glass, aluminosilicate glass) or preferably of transparent plastics (for example polymethyl methacrylate or polycarbonate).
  • transparent plastics for panes made of transparent plastics, the reduction of radiation in the UV range through the sun protection coating is particularly advantageous.
  • the thickness of the slices can vary widely. Discs with a thickness in the range from 0.8 mm to 6 mm, preferably from 1.4 mm to 2.5 mm, for example those with the standard thicknesses of 1.6 mm or 2.1 mm, are preferably used.
  • the curved pane, the second pane and the thermoplastic intermediate layer can be clear and colorless, but also tinted or colored.
  • the total transmission according to light type A through the laminated glass is preferably greater than 70%.
  • the term overall transmission refers to the procedure for testing the light transmission of vehicle windows specified by ECE-R 43, Annex 3, Section 9.1.
  • the vehicle glazing can have further layers such as a further functional coating.
  • a further functional coating include, for example, a UV-reflecting or UV-absorbing coating, a coloring coating, a coating with low emissivity (so-called low-E coating), a heatable coating or heatable wires, a coating with an antenna function, a coating with a splinter-binding effect (splinter-binding coating ) or a coating for shielding against electromagnetic radiation, for example radar radiation.
  • These coatings are preferably arranged below the sun protection coating on the curved pane or on the opposite surface of the curved pane.
  • the functional coating can also be arranged on the second pane.
  • the sun protection coating can be arranged directly on the functional coating.
  • the sun protection coating is preferably combined with a low-E coating, which further lowers the TTS value of the pane and thus improves the thermal comfort of the glazing.
  • the low-E coating is particularly preferably arranged on the exposed surface on the interior side.
  • the thermoplastic intermediate layer contains at least one thermoplastic polymer, preferably ethylene vinyl acetate (EVA), polyvinyl butyral (PVB) or polyurethane (PU) or mixtures or copolymers or derivatives thereof, particularly preferably PVB.
  • the intermediate layer is typically formed from a thermoplastic film.
  • the thickness of the intermediate layer is preferably from 0.2 mm to 2 mm, particularly preferably from 0.3 mm to 1 mm.
  • the invention further comprises a method for producing a vehicle glazing according to the invention as described above.
  • the advantageous configurations of the vehicle glazing according to the invention also apply to the method according to the invention and vice versa.
  • the method according to the invention comprises the following steps:
  • a curved disc is provided.
  • Typical temperatures for glass bending processes are, for example, 500 ° C to 700 ° C.
  • the outer pane and inner pane are preferably bent together (that is, using the same tool and preferably at the same time) congruently, because the shape of the panes is optimally matched for the subsequent lamination.
  • One advantage of the method according to the invention is that the pane is initially bent without a sun protection coating, so that it cannot be damaged during the bending process by the increased temperatures and the tools used.
  • the surface of the curved pane to be coated is cleaned.
  • the surface of the pane to be coated is the surface of the pane that is to be provided with the sun protection coating. Careful cleaning of the too coating surface is important so that the subsequently applied sun protection coating is evenly distributed without being affected by contaminants such as dust or other residues. It is also important that the surface is free of grease so that the sun protection coating adheres securely to the curved pane.
  • Alcoholic cleaning solutions based on methanol at least 70% by weight of methanol, preferably 90% by weight of methanol, in each case mixed with water
  • based on ethanol at least 70% by weight of ethanol, preferably 90% by weight of ethanol, in each case
  • Ethanol is preferred for industrial use because of its lower toxicity compared to methanol.
  • the alcoholic cleaning solutions ensure that the surface is free of grease and can be coated further directly. If necessary, further additives can be added to the cleaning solution that further prepare the surface, such as silicon oxide or tin oxide.
  • the cesium tungstate nanoparticles are applied to the surface of the curved pane to be coated and cleaned.
  • a solution of cesium tungstate nanoparticles is applied by rolling, spraying or wiping. The solution is distributed evenly over the entire pane, which is particularly easy to achieve industrially by spraying on.
  • the curved pane is then dried, with the applied cesium tungstate nanoparticles forming a uniform layer and a hardened sun protection coating.
  • the pane can be dried either in a vertical orientation (surface perpendicular to the ground; pane is upright) or in a horizontal orientation (surface parallel to the ground; pane is lying).
  • the cesium tungstate nanoparticles are preferably used in solution. After the solution has been applied, any remaining solvent must evaporate and the components of the layer must harden.
  • the curved pane is preferably dried at temperatures between 15 ° C and 50 ° C. This prevents the layer from hardening too quickly. Alternatively, higher temperatures are also possible, whereby the drying process can be accelerated further.
  • the duration of the drying process depends on the temperature and can be between 2 hours and 2 weeks.
  • the cesium tungstate nanoparticles are preferably present in a solution with a liquid, not yet hardened polymer matrix, which hardens and dries only after being applied to the pane to be coated.
  • the solution used comprises, in addition to the cesium tungstate nanoparticles, a self-leveling mixture.
  • a self-leveling mixture remains liquid enough for a limited time after preparation to flow by itself in such a way that a uniform layer is formed without large differences in thickness (deviations in the range of up to 1 ⁇ m in thickness).
  • the mixture then hardens and forms a compact, smooth surface.
  • Mixtures comprising acrylic resin and cesium tungstate nanoparticles in a suitable solvent, which are mixed with a diisocyanate shortly before use (at most about 2 hours beforehand), are suitable. These self-leveling mixtures then form a polymer matrix on the coated pane in which the nanoparticles are embedded.
  • the solution used comprises, in addition to the cesium tungstate nanoparticles, also indium oxide nanoparticles.
  • the curved pane is arranged with a thermoplastic intermediate layer and a second pane to form a stack of layers and laminated to a composite pane under increased temperature and vacuum / pressure.
  • the lamination can be carried out using processes known per se, such as autoclave processes, vacuum bag processes, vacuum ring processes, calender processes, vacuum laminators or combinations thereof.
  • the invention further comprises the use of a vehicle glazing according to the invention in a vehicle on land, on water or in the air, the vehicle preferably being an automobile, a truck, an agricultural utility vehicle, a bus, an airplane or a rail vehicle, in particular a train.
  • the vehicle glazing according to the invention is preferably used as a side window, rear window, roof window or windshield in a motor vehicle, preferably as a side window, rear window or roof window.
  • the invention is explained in more detail below with reference to a drawing and exemplary embodiments.
  • the drawing is a schematic representation and is not true to scale. The drawing does not restrict the invention in any way.
  • Fig. 1 shows a cross section through an embodiment of an inventive
  • FIG. 2 shows a cross section through a further embodiment of a vehicle glazing according to the invention
  • FIG. 3 shows a cross section through a further embodiment of a vehicle glazing according to the invention
  • FIG. 5 shows a transmission spectrum of a vehicle glazing according to the invention and a vehicle glazing with a conventional electrically conductive one
  • FIG. 6 shows a reflection spectrum of a vehicle glazing according to the invention and a vehicle glazing with a conventional electrically conductive coating.
  • FIG. 1 shows vehicle glazing made from single-pane safety glass 1 based on tempered 2.1 mm thick bent soda-lime glass.
  • the vehicle glazing is intended for installation in a vehicle as a fixed side window.
  • the vehicle glazing has an exposed surface E II on the inside and an exposed surface E I on the outside.
  • the interior-side exposed surface E II is intended to be directed in the direction of the vehicle interior.
  • An IR-absorbing sun protection coating 4 is arranged directly on the interior surface E II of the curved pane 1.
  • the IR-absorbing sun protection coating 4 comprises cesium tungstate nanoparticles and has been produced as described for FIG.
  • Table 1 shows some optical values of the vehicle glazing according to the invention (example according to FIG. 1) and a comparative example, which are familiar to the person skilled in the art and are usually used to characterize vehicle windows.
  • the comparative example is a corresponding single-pane glazing with a conventional silver-based magnetron coating.
  • TL (A) stand for the light transmission of visible light according to type of light A and RE stands for the energy reflection of light in the IR range.
  • TTS stands for the total irradiated solar energy, measured according to ISO 13837, and is a measure of thermal comfort. The lower the TTS value, the better the sun protection function of the glazing.
  • the vehicle glazing according to the invention (example) is distinguished by high transmission in the visible wavelength range (400 nm-800 nm; see also FIG. 5).
  • the glazing according to the invention has even higher transparency in the visible wavelength range, while the glazing of the comparative example is less transparent in the IR range (800 nm-2500 nm) than that of the example.
  • the glazing according to the invention has a high TL value which is even higher than that of the comparative example (see Table 1).
  • the glazing according to the invention thus fulfills the legal requirements for a windshield of a car, which is TL> 70%.
  • UV radiation between 300 nm and 400 nm is blocked by both glazings (example and comparative example) (see FIG. 5).
  • the vehicle glazing according to the invention meets the customary market requirements for a windshield, which has a TTS value of approximately 50%. In comparison with conventional glazing with magnetron coating, it is approximately in the same range (see Table 1), so that the thermal comfort of the vehicle glazing according to the invention is at least as high as that of conventional silver-coated vehicle glazing.
  • the reflection spectra (see FIG. 6) of the vehicle glazing according to the invention and the corresponding comparative example are completely different in the IR range (800 nm-2500 nm). While the comparative example shows a high degree of reflection in this range, the degree of reflection R of the glazing according to the invention is below 10%, so that this glazing even with speed controls using IR cameras can be used. This is a major advantage of the glazing according to the invention.
  • Another advantage of the vehicle glazing according to the invention is the high permeability for high-frequency radiation, as used, for example, in the mobile radio sector. This means that no additional selective stripping processes are necessary, as would be necessary with conductive magnetron coatings.
  • the coated pane has a high optical quality and is essentially free of optical distortion, which was checked using an aura measurement (optical distortion fixed) in accordance with the ECE-R43 approval standard was evaluated according to the VW TL 957 2018 standard.
  • the coating is color-neutral in reflection, so that, for example, water droplets that are on a vehicle roof or a windshield do not show a colorful, especially red, color, which looks like blood drops on the vehicle. Such a “blood drop effect” is often observed, particularly with silver-based solar control glazing.
  • FIG. 4 shows a schematic representation of an embodiment of the method according to the invention using the example of the production of the vehicle window in FIG. 1.
  • a bent and pretensioned window 1 is provided. This is cleaned in step a) and thus prepared for the subsequent process steps (prepared surface is shown by the dotted surface in the figure). Careful cleaning is a prerequisite for the successful application of the sun protection coating 4. Smaller soiling would otherwise impair the adhesion and the optical quality of the sun protection coating.
  • the pane was cleaned with a mixture containing methanol (90% by weight), water (4% by weight), silicon dioxide (2% by weight) and tin oxide (0.1% by weight). This mixture is commercially available under the name DryWired® LNT Glass Primer. Other cleaning agents can also be used. Cleaning with the help of common industrial washing machines and common water-based washing solutions is also sufficient, since it is usually brand-new glass.
  • a second step two components for the sun protection coating are first mixed.
  • the finished mixture can only be kept for one to two hours.
  • a mixture of DryWired® Liquid NanoTint® and the Liquid NanoTint® Hardener in a weight ratio of 9: 1 is produced.
  • Other preparations for Production of a self-leveling matrix with Cäsiu wolfra at nanoparticles can be used.
  • Liquid NanoTint® contains cesium tungstate nanoparticles (5% by weight), 2- (2-hydroxy-5-methylphenyl) benzotriazole (7% by weight), 2-butoxyethyl acetate (10-20% by weight), propylene glycol monomethyl ether acetate ( 19% by weight), acrylic resin (23-35% by weight) and butyl acetate (23-35% by weight).
  • Liquid NanoTint® Hardener includes
  • an embodiment of the vehicle window F is shown as a composite window 10.
  • the composite pane 10 is composed of a curved pane 1 (inner pane) and a second pane 2 (outer pane), which are connected to one another via a thermoplastic intermediate layer 3.
  • the outer pane 2 faces the external environment
  • the inner pane 1 faces the vehicle interior.
  • the outer pane 2 has an exposed surface LI on the outside, which faces the external environment in the installed position, and a surface L II on the inside, which faces the internal space and the thermoplastic intermediate layer 3 in the installed position.
  • the inner pane 1 has an outside surface L III which, in the installed position, faces the external environment and the thermoplastic intermediate layer 3, and an interior exposed surface L IV which, in the installed position, faces the interior.
  • the outer pane 2 and the inner pane 1 consist, for example, of soda-lime glass.
  • the outer pane 2 has, for example, a thickness of 2.1 mm, the inner pane 1 a thickness of 1.6 mm.
  • the intermediate layer 3 is formed, for example, from a PVB film with a thickness of 0.76 mm.
  • the PVB film has an essentially constant thickness, apart from any surface roughness that is customary in the art.
  • a sun protection coating 4 is arranged on the exposed interior-side surface L IV, as can be produced using the method described in relation to FIG.
  • FIG. 3 shows a further embodiment of a vehicle glazing F in the form of a composite pane 10.
  • the individual components are the same as described for FIG.
  • the composite pane 10 also consists of a curved pane 1, which is arranged as an outer pane 1 in this case, and a second pane 2, which is arranged as an inner pane 2.
  • the sun protection coating 4 is here arranged on the outer pane 1 of the composite pane, whereby it is not arranged on the exposed outer surface LI.
  • the sun protection coating 4 is arranged on the inside surface L II, which points in the direction of the thermoplastic intermediate layer 3.
  • the sun protection coating 4 is advantageously protected from mechanical damage such as scratches or the effects of the weather.
  • the arrangement of the sun protection coating on the outer pane is particularly advantageous from a thermal point of view, since the heat is absorbed as close as possible to the exposed outer glass surface. This makes it easier for the heat to be dissipated again by convection, for example when the vehicle is moving.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Dispersion Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

L'invention porte sur un vitrage de véhicule (F) comprenant une vitre incurvée (1) ayant un revêtement pare-soleil (4) contenant des nanoparticules de tungstate de césium, le revêtement pare-soleil (4) étant disposé directement sur la vitre incurvée (1).
EP21715930.0A 2020-04-15 2021-04-07 Vitrage de véhicule à revêtement pare-soleil Pending EP4135978A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20169606 2020-04-15
PCT/EP2021/059000 WO2021209289A1 (fr) 2020-04-15 2021-04-07 Vitrage de véhicule à revêtement pare-soleil

Publications (1)

Publication Number Publication Date
EP4135978A1 true EP4135978A1 (fr) 2023-02-22

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EP (1) EP4135978A1 (fr)
CN (1) CN113840727A (fr)
WO (1) WO2021209289A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6734396B2 (en) 2001-09-07 2004-05-11 Centre Luxembourgeois De Recherches Pour Le Verre Et La Ceramique S.A. (C.R.V.C.) Heatable vehicle window with different voltages in different heatable zones
FR2862961B1 (fr) 2003-11-28 2006-02-17 Saint Gobain Substrat transparent utilisable alternativement ou cumulativement pour le controle thermique, le blindage electromagnetique et le vitrage chauffant.
US7335421B2 (en) 2005-07-20 2008-02-26 Ppg Industries Ohio, Inc. Heatable windshield
US20100220388A1 (en) 2007-06-08 2010-09-02 Bridgestone Corporation Near-infrared shielding material, laminate including the same, and optical filter for display including the same
CN102277023A (zh) * 2011-07-04 2011-12-14 大连工业大学 一种玻璃透明隔热涂料及其制备方法
EA026887B1 (ru) 2012-01-10 2017-05-31 Сэн-Гобэн Гласс Франс Прозрачное оконное стекло с электропроводным покрытием и способ изготовления указанного стекла
KR101589854B1 (ko) 2012-01-10 2016-01-28 쌩-고벵 글래스 프랑스 도전성 코팅을 갖는 투명한 창유리
EP2878442A1 (fr) 2013-11-29 2015-06-03 Kuraray Europe GmbH Stratifiés de verre composite ayant des propriétés isolantes contre le rayonnement thermique
US9776379B2 (en) * 2014-04-29 2017-10-03 Pleotint, L.L.C. Absorbing solar control interlayers
CN104925867B (zh) 2015-06-12 2016-10-26 深圳大学 一种纳米钨酸铯粉体及其制备方法与应用
WO2017161423A1 (fr) 2016-03-24 2017-09-28 Monash University Revêtement de fenêtre intelligent
CN107573726B (zh) * 2017-08-21 2019-05-28 福耀玻璃工业集团股份有限公司 一种隔热隔紫外玻璃及其制造方法
CN109987855B (zh) * 2017-12-29 2022-08-12 法国圣戈班玻璃公司 隔热玻璃、制备方法及隔热玻璃产品
CN112192921A (zh) * 2020-01-09 2021-01-08 法国圣戈班玻璃公司 隔热夹层玻璃及其制备方法

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CN113840727A (zh) 2021-12-24

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