EP4526267A1 - Vitrage de toit monolithique pour automobile - Google Patents
Vitrage de toit monolithique pour automobileInfo
- Publication number
- EP4526267A1 EP4526267A1 EP23726109.4A EP23726109A EP4526267A1 EP 4526267 A1 EP4526267 A1 EP 4526267A1 EP 23726109 A EP23726109 A EP 23726109A EP 4526267 A1 EP4526267 A1 EP 4526267A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- meth
- glazing
- acrylate
- glazing according
- layer
- 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
-
- 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
- C03C4/00—Compositions for glass with special properties
- C03C4/0092—Compositions for glass with special properties for glass with improved high visible transmittance, e.g. extra-clear glass
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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
- C03C17/36—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 being a metal
- C03C17/38—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 being a metal at least one coating being a coating of an organic material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/41—Organic pigments; Organic dyes
-
- 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
- C03C2217/78—Coatings specially designed to be durable, e.g. scratch-resistant
Definitions
- the invention relates to glazing for automobiles and in particular for use as automobile roof glass.
- the glass glazing used as an opening or fixed panoramic roof in vehicles must respect a certain number of criteria, with regard to the heating of the interior of the vehicle under strong insolation: - on the one hand not to allow pass all of the incident solar radiation so as not to excessively heat the interior space of the vehicle and/or limit energy consumption (due for example to excessive use of air conditioning due to the quantity of heat entering the passenger compartment), and - on the other hand, allow a sufficiently large quantity of light to pass through to sufficiently illuminate the interior space and ensure a minimum of exterior visibility to maintain visual comfort and a feeling of comfort.
- panoramic roof glazing has an exterior surface that is very exposed to direct sunlight, which causes heat and glare if the glass does not include such coatings or is not tinted throughout.
- the initial technical objective of the present invention is to limit glare by reducing the transmission of light through the glass, and also to improve anti-solar performance in automobile glazing and in particular those used as roofs, so as to avoid heating the interior space of the passenger compartment.
- TTS total solar transmission
- Anti-solar performance is therefore measured by the total solar energy transmitted (TTS) for this type of glazing.
- the TL light transmission As measured according to the ISO9050 standard (2003).
- Lowering the TL can be achieved by absorption.
- absorption is obtained by the use in the glazing of a sheet of glass tinted throughout or alternatively or in addition to one or more layers of tinted PVB, within laminated glazing, that is to say made up of several assembled sheets of glass.
- Another important factor concerning anti-solar glazing and their ability to prevent heating of the interior passenger compartment is their ability to selectively reflect solar infrared.
- Such a capacity is obtained thanks to stacks of thin layers (that is to say whose thickness is of the order of a few nanometers or a few tens of nanometers), one of which has a high reflection coefficient. in thermal infrared.
- This capacity is generally obtained by a stack comprising at least one and preferably two or even three silver layers of a few nanometers thickness, in particular of the type of those described in applications WO2005/051858 or even WO2013/104439 to which we will refer for more details on such 15 stacks.
- the capacity of glazing equipped with such stacks to reflect infrared is for example measured by the total emissivity at normal incidence ⁇ n, for example as measured according to standard NF EN 12898 (2001).
- Patent specification US6910729 alternatively describes glazing with a thermal comfort effect combining an electrochromic glass with a low-emissivity layer placed on the surface facing the interior space of the vehicle.
- Patent application EP 1060876 A2 describes according to another solution a laminated glazing consisting of an exterior sheet of glass, a solar protection stack 10 comprising two layers of silver placed on face 2 (the faces being numbered from the outside towards the 'interior), a sheet of clear PVB, a sheet of tinted PVB, and an inner sheet of glass, on which a low-emissive layer of tin oxide doped with fluorine is deposited.
- glazing is sought, which has an equally effective absorption profile but whose manufacturing is much less complex than those of the prior art, and in particular based on simple (or monolithic) glazing, that is to say comprising only one glass substrate (sheet of glass).
- simple (or monolithic) glazing that is to say comprising only one glass substrate (sheet of glass).
- the provision of such single glazing is the object of the present invention.
- glazing is preferably sought having jointly the following specifications: - a TTS of the order of 20% or less, - a TL light transmission of less than 10% or even less than 5 % and ideally of the order of 1 to 2%, - an emissivity ⁇ n as low as possible and in particular less than or equal to 30%.
- the problem underlying the invention is therefore to propose a glass that is easy and economical to manufacture, in particular which does not include tinted glass or tinted PVB in its mass, which can in particular be used as a roof for an automobile, which allows to respond to the desired compromise between TTS and TL, in particular a light transmission in the visible TL less than 10%, or even less than 5% and a TTS factor less than 20%, and a low emissivity, in particular less than or equal to 30%.
- monolithic glazing we conventionally mean in the building sector glazing which includes only one sheet of glass (see for example “The professional construction dictionary” published by Eyrolles).
- Such glazing has the following characteristics: it includes as a support and protective element a single sheet of clear glass. It comprises the succession of the following 10 elements, from the outside towards the inside of said glazing: - said sheet of clear glass, - a stack of layers reflecting infrared radiation, in particular from 780 nm and preferably up to far infrared (from 3 to 50 micrometers), said stack preferably being in contact with the interior surface of said clear glass sheet, - a layer of a polymeric compound, preferably deposited directly on said stack of layers or stuck to it via a layer of an adhesion promoter, said polymeric compound comprising a coloring agent, said coloring agent absorbing light located in the visible range, between 380 and 780 nm, and being 25 substantially transparent to infrared radiation, in particular to infrared radiation, in particular of wavelength between 780 and 2000 nm, said layer being in contact with the external environment (that is to say it is the last element of said succession, without a sheet of glass, layer or stack covering it).
- - Said dye presents on an absorption spectrum between 380 and 2000 nm, as measured by a spectrophotometer Perkin–Elmer lambda 950 at 25°C, for a layer of 40 10 micrometers in an acrylate polymer and at a concentration of 1% by weight, an absorbance averaged between 780 and 2000 nm at least 3 times lower than the absorbance averaged between 380 and 780 nm and preferably at least 5 times lower, or even at least 7 times lower.
- 15 - Said dye is black or substantially black.
- - Said dye presents at 25°C, an average molar extinction coefficient (or molar absorptivity) between 780 nm and 2000 nm at least 3 times lower than the average molar extinction coefficient between 380 nm and 780 nm and preferably 20 least 5 times lower.
- the molar extinction coefficient also called molar absorptivity or molar absorption coefficient, characterizes the abilities of a composition to absorb light.
- the Beer-Lambert law 25 states that it does not depend on the concentration of the composition nor on the thickness crossed by the light but on the nature of the solute (here the dye) and the solvent (here the matrix), the wavelength of the incident light and the temperature.
- An “average” molar extinction coefficient 30 thus corresponds in the sense of the present invention to the average of said coefficients, as measured over the wavelength interval considered.
- the stack of layers reflecting infrared radiation is a stack comprising at least two layers functional layers based on silver, preferably at least 3 functional layers based on silver, separated by layers of dielectric materials, in particular by oxides or nitrides.
- the polymer layer comprises or preferably consists of a polymer compound chosen from (meth)acrylate compounds, preferably polyfunctional and comprising at least two acrylate functions.
- the polymer layer is obtained by crosslinking a polymerizable composition comprising (meth)acrylate compounds, optionally comprising a polyorganosiloxane group, a polymerization initiator, and optionally an adhesion promoter, in which said (meth)acrylate compounds comprise high-functionality (meth)acrylate compounds: - having at least 4 (meth)acrylate functions and representing, by mass relative to the total mass of said composition, in increasing order of preference, at least 65%, at least 70%, at least 80%, at least 90%, at least 94% or 20 - having at least 5 (meth)acrylate functions and representing, by mass relative to the total mass of said composition, in order of increasing preference, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 94% of said composition.
- the polymerizable composition comprises high functionality (meth)acrylate compounds having at least 6 (meth)acrylate functions and representing in increasing order of preference, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 94% of said composition.
- (meth)acrylate is meant an acrylate or a methacrylate.
- the polymeric layer is essentially organic in nature. It is obtained from a polymerizable composition. It results from the crosslinking of the polymerizable organic compounds present in the polymerizable composition.
- the (meth)acrylate compounds represent by mass relative to the total mass of the polymeric layer, in order of increasing preference: - at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, and/or - at most 99%, at most 98%, at most 97%, at most 96%, at most 95%.
- (Meth)acrylate compounds have a molecular mass or average molecular mass (hereinafter molecular mass) of between 150 and 10,000 g/mol.
- (Meth)acrylate compounds include high functionality (meth)acrylate compounds. These high-functionality compounds are chosen from esters of acrylic or methacrylic acid comprising, in order of increasing preference, at least 4, at least 5, at least 6 (meth)acrylate functions.
- (Meth)acrylate compounds comprising high functionality (meth)acrylate compounds have a molecular mass, in order of increasing preference, between 500 and 10,000, between 800 and 5,000, between 1,000 and 2,000 g/mol.
- the high-functionality (meth)acrylate compounds comprise at least 4 (meth)acrylate functions. They represent, by mass relative to the total mass of the polymeric layer, in increasing order of preference, at least 65%, at least 60%, at least 70%, at least 80%, at least 90%, at least 94%.
- the high functionality (meth)acrylate compounds having at least 5 (meth)acrylate functions represent, by mass relative to the total mass of the polymeric layer, in increasing order of preference, at least 50%, at least 60%, at least 70%, at least 80%, at least 90% , at least 94% 5
- the high functionality (meth)acrylate compounds having at least 6 (meth)acrylate functions represent, by mass relative to the total mass of the polymeric layer, in order of preferably increasing, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 94%.
- the (meth)acrylate compounds a) comprise high-functionality (meth)acrylate compounds comprising at least 6 (meth)acrylate functions and a molecular mass ranging from 1000 to 2000 g/mol.
- high-functionality (meth)acrylate compounds comprising at least 6 (meth)acrylate functions and a molecular mass ranging from 1000 to 2000 g/mol.
- Sartomer which is an aliphatic urethane-acrylate prepolymer comprising 6 (meth)acrylate functions and a molecular mass of 1450 g/mol.
- said polymerizable composition also has the following characteristics: - it comprises at least one polymerization initiator (or initiator), preferably a photoinitiator, - the polymerization initiator represents 0, 1 to 20%, or 1 to 15%, preferably 3 to 10% and better still 4 to 8% by weight of said composition, - the (meth)acrylate compounds a) are chosen from monomers, oligomers, prepolymers or polymers comprising at least one (meth)acrylate function, - the (meth)acrylate compounds are chosen from esters of acrylic or methacrylic acid comprising at least two (meth)acrylate functions, - (meth)acrylate compounds optionally comprise at least one aliphatic urethane-acrylic oligomer, - the (meth)acrylate compounds comprise at least one oligomeric or prepolymer monomer comprising, in order of increasing preference, at least 2, at least 3, at least 4, at least 5, at least 6 (meth)acrylate functions, 5
- the polymerizable composition comprises at least one additional compound comprising a polyorganosiloxane group and at least two (meth)acrylate functions.
- the polymerization initiators and the compound comprising a polyorganosiloxane group are not considered as additives.
- the additional compound comprising a polyorganosiloxane group has for example a molecular mass of between 500 and 10,000 g/mol.
- said additional compound has a molecular mass, in order of increasing preference, between 500 and 15000, between 1000 and 10000, between 3000 and 7000 g/mol.
- Molecular masses can be determined by gel permeation chromatography.
- Said additional compound represents 0.05 to 5% by weight of the polymerizable composition.
- the compound comprising a polyorganosiloxane group represents, in increasing order of preference, 0.05 to 5%, 0.1 to 4%, 0.2 to 3%, 0.3 to 2%, 0.3 to 1.5% of the total mass of the organic protective layer.
- the polyorganosiloxane group of the compound comprising a polyorganosiloxane group consists of 2 to 1000 organosiloxane units. This polyorganosiloxane group may be part of the main chain of the compound or part of a side chain.
- the compound comprising a polyorganosiloxane group can be chosen from modified polyorganosiloxanes comprising a plurality of (meth)acrylate functions.
- This type of compound corresponds to a compound having at least two (meth)acrylate functions introduced in any position of a polyorganosiloxane chain (or skeleton), in particular on a side chain or at the end of the main chain.
- the compound comprising a polyorganosiloxane group represents, in order of increasing preference, 0.05 to 1.5%, 0.1 to 1%, 0.2 to 0.7%, 0.4 to 0. 6% by mass of said composition.
- This type of compound is for example marketed under the name Byk 3505.
- the compound comprising a polyorganosiloxane group can be chosen from modified poly(meth)acrylates comprising polyorganosiloxane groups and at least two (meth)acrylate functions.
- the compound comprising a polyorganosiloxane group represents, in increasing order of preference, 0.2 to 4%, 0.4 to 3%, 0.6 to 2%, 0.9 to 1.6% by mass of said composition.
- the thickness of the polymeric layer is between 0.1 and 25 micrometers, preferably between 0.1 and 20 30 micrometers, more preferably 0.2 and 10 micrometers, or even between 0.2 and 5 micrometers and so very preferred between 0.5 and 3 micrometers.
- the coloring agent is chosen from the compounds in the Epolight 7527® range, in particular the compounds 7527B and Epolight 7527C marketed by the company Epolin.
- the coloring agent is chosen from Sudan Black B® ((2,2-5 dimethyl-1,3-dihydroperimidin-6-yl)-(4-phenylazo-1-naphthyl)diazene, C29H24N6, CAS 4197-25 -5) or Nigrosine Solvent black 5 (CAS 11099-03-9), and preferably Sudan Black B®.
- the coloring agent represents between 5 and 70% by weight of the polymer, preferably between 10 and 60% by weight and preferably between 20 and 50% by weight of the polymer.
- the glass sheet has a thickness of between 0.7 mm and 5 mm and preferably between 1.6 mm and 3.1 mm.
- the stack of layers is a system of thin layers 15 with thicknesses between 0.5 and 100 nm which comprises one or more silver-based layers, preferably which comprises at least two silver-based layers.
- the invention also relates to the use of monolithic glazing as previously described as a roof, side window, or rear window of motor vehicles.
- the invention relates to a method of manufacturing monolithic glazing as described above, comprising a single sheet of glass, characterized in that it comprises the following steps: 25 - deposition of a stack of layers reflecting the infrared radiation, in particular of wavelength greater than 780 nm, on an internal face of said sheet of glass, - deposition on said stack of a polymeric layer 30 comprising a coloring agent as described above, said coloring agent absorbing substantially light located in the visible domain and being transparent to infrared, - drying and/or hardening of the polymeric layer comprising the coloring agent, in particular by UV treatment.
- FIG. 1 By way of non-limiting example and for a better understanding of the present invention, there is shown in Figure 1 attached in the appendix an embodiment of glazing according to the invention seen in a cross section.
- This embodiment is particularly suitable for producing a glass roof structure for an automobile 10 but could also be used as a rear window, or even as side glazing.
- the glazing 10 according to the invention comprises a sheet of clear glass 1, that is to say not tinted throughout.
- such glazing is conventionally obtained by a so-called float glass process.
- Such untinted glasses may in particular have a TL light transmission of at least 88%, and most often of the order of 90%.
- the glazing according to the invention comprises only one and only one sheet of glass.
- the glazing 10 separates the interior space 4 from the exterior 5 of the vehicle and can be curved as shown in Figure 1.
- the glass sheet has a thickness preferably between 1 mm and 8 mm, in particular between 1 and 8 mm. 4mm.
- the single sheet of glass must make it possible to achieve as good a compromise as possible between low thickness and high safety, in particular when the glazing is mounted in an automobile. 30
- Such a compromise can be obtained in particular with a sheet of tempered glass whose thickness is between 1.5 mm and 3.1 mm, for example 2.1 mm.
- the external face of the glass sheet 1 is preferably bare, while on the internal part of the sheet 1 is deposited a stack 2 of layers selectively reflecting infrared.
- Such stacks are well known and in particular comprise a combination of layers based on precious metals, in particular, based on silver and dielectric materials often called interference layers.
- these stacks consist of a succession of layers of dielectric materials such as oxides and/or nitrides and of metal layers including silver-based layers whose so-called “low emissive” properties make it possible to reflect selectively the so-called solar or near infrared (in particular of wavelength between 780 nm and 2000 nm) and to let pass at least in part and preferably more than 70%, or even more than 80% of the visible light of the solar spectrum (with a wavelength between 380 and 780 nm), in particular by minimizing light reflection by means of said interference layers or combination(s) of interference layers.
- the stacks according to the invention are in particular selected in such a way that their resistance per square is less than 1.5 Ohms per square, more preferably less than 1.2 Ohms per square, or even less than 1.1 Ohms per square. .
- the resistance per square can for example be measured using an SRM-14T type device from Nagy Mess-systems.
- Such stacks can comprise up to several dozen layers whose thickness is of the order of 1 to 30 nm and are currently deposited by so-called cathode sputtering techniques, often assisted by magnetron.
- the preferred stacks according to the invention comprise two, and preferably three or even four silver-based layers.
- the low emissive stack is covered with a layer 3 comprising a coloring agent.
- This additional layer 3 is constituted by a layer 10 of a polymer compound.
- a polymer may be or comprise a polymer of the (metha)crylate type, in particular of the type described in the publications WO2018/178559, WO2018/178547 or even WO2018/115768, WO2020/016527 or preferably as described in the 15 application WO2020/016529 as described previously.
- the polymeric layer 3 can advantageously be obtained from a liquid composition comprising (meth)acrylate oligomers comprising at least one methacrylate function and preferably a plurality of methacrylate functions.
- the liquid composition may advantageously comprise at least one aliphatic urethane-acrylic oligomer, at least one polymerization initiator and the coloring agent.
- the polymeric layer 3 can advantageously be obtained from a liquid composition comprising (meth)acrylate compounds chosen from monomers, oligomers, or polymers comprising at least one methacrylate function and preferably several methacrylate functions .
- the liquid composition comprises at least one monomer or oligomer of said preferably polyfunctional (meth)acrylate compounds, at least one polymerization initiator and the coloring agent.
- the coloring agent is present in the initial composition in an amount of between 5% and 70% relative to the total mass of the polymeric compounds present in the polymer compound layer, preferably between 10 and 60%. , or even between 20 and 50% by weight relative to said total mass.
- the polymeric layer 3 may further comprise an adhesion promoting agent on the stack of layers 2.
- the deposition of the polymeric layer 3 on the stack of 10 layers 2 can be carried out by application at room temperature of the liquid composition described previously, by roller coating, by spraying, by dipping, by curtain coating or by spraying, or even by spin coating techniques (centrifugal coating).
- the polymeric layer 3 is advantageously then hardened by drying at a temperature below 200° C., by UV crosslinking, or by electron beam.
- the thickness of the dried and/or hardened polymeric layer 3 can be between 0.1 and 25 micrometers, typically between 0.5 and 3 micrometers.
- the polymeric layer comprises an adhesion promoter with the stack.
- the surface of the stack of layers on which the colored polymeric layer is deposited can be previously treated with an adhesion promoting agent.
- the polymer layer serves as a matrix for a dye (or coloring agent) specifically chosen for its light absorption qualities located in the visible range (380-780 nm) but also substantially transparent to infrared. , in particular those between 780 and 2000 nm.
- a dye or coloring agent
- said dye absorbs most of the visible light between 380 and 780 nm, for example at least 60% or even more. 70% or more than 75%, or even substantially all of the visible light between 380 and 780 nm.
- infrared transparent it is meant that said dye allows the majority, for example at least 60%, preferably at least 70% or even more than 80% or even more than 90% or even substantially all of the color to pass through.
- such coloring agents are the compounds of the Epolight 7527® range, in particular the compounds 7527B and Epolight 7527C marketed by the company Epolin. (https://www.epolin.com/epolight-voirt-dyes-for-solvent-based-systems/).
- Figure 2 attached shows the absorption spectrum of the compound Epolight 7527C in an acrylate layer and at a concentration of 1% by weight, as an example. The absorbance measured between 380 and 780 nm is 0.79 and the absorbance measured between 780 and 2000 nm is 0.08.
- Sudan type dyes and in particular the Sudan Black B dye, the structural formula of which is given below:
- the present invention is not limited to such compounds and any dye having, in its matrix, a low infrared absorption coefficient of between 780 nm and 2000 nm, and a high absorption coefficient 30 in the visible domain can be used according to the invention.
- the dye used is therefore in principle black but we can also use dyes which do not absorb not all of the visible light but at least 70% or even at least 80% or even of it, and which then presents a slight coloring, although dark.
- such a method of manufacturing glazing comprises the following steps: - deposition by vacuum cathode sputtering techniques of a stack 2 reflecting infrared as described previously, on the internal face of a sheet of glass 1, 10 - possibly shaping of said glazing such as bending or tempering, - deposition by liquid method, in particular by roller coating, by sprinkling, by dipping, by curtain coating or preferably by spraying (spray-coating ) on the internal face of said glass sheet (sheet 1 provided with stack 2) of a polymeric layer 3 comprising the coloring agent or of a varnish comprising the coloring agent, - drying and possibly hardening of the polymeric layer 3, in particular by drying and/or hardening by 20 UV.
- the glazing according to the invention makes it possible to resolve the technical problem previously described thanks to its particular structure. It 25 allows in particular to combine the following advantages: - a low cost of the materials used in its composition since it does not contain the most expensive elements present in current structures (in particular no PVB initially colored in its mass, no of colored glass 30 in its mass) and therefore a low manufacturing cost. Furthermore, the liquid deposits which can be used according to the invention are generally inexpensive due to a high line speed and the dyes used are commercial and inexpensive; - the possibility of adjusting the light transmission of the glazing by adjusting the mass concentration of dye in the polymeric layer up to values of up to 70% of the total weight of said layer (dry matter).
- the light reflection in the visible range is often low, typically less than 10%, on the internal side of the glazing, which ensures improved interior comfort, particularly at night, by avoiding a mirror effect on said side. internal of the glazing.
- the stack of layers and the concentration of the dye are advantageously chosen in combination to allow a sufficiently large quantity of light to pass through to sufficiently illuminate the interior space and thus maintain visual comfort and a feeling of comfort.
- a stack of layers which, when deposited on a clear glass with a thickness of 2.1 mm without any other element, leads to glazing having a light transmission T L in the sense previously described of at least 50%, or even at least 60% or even at least 70%.
- A- Manufacture of a monolithic structure according to the invention A sample A is prepared, of a structure as described previously in relation to the figure 1, of 10 dimensions 10 ⁇ 10 cm2. Sample A is obtained in the following manner: - A stack of 15 layers by magnetron-assisted sputtering techniques. The stack comprises three layers of silver and is described in example 14 of publication WO2005051858. Its resistance per square is 1.0 Ohm/square, as measured using a Nagy Mess Systems type SRM-14T device.
- a liquid composition of the following composition is deposited: - a hexa-functional aliphatic acrylate oligomer (hereinafter 6-functional acrylate oligomer) having a molecular mass of 1450 g/mol, marketed by the company Sartomer under the reference CN9010EU. - a modified polyorganosiloxane comprising a plurality of (meth)acrylates having a molecular mass of 6500 g/mol, sold by the company Byk under the name Byk 30 3505. - an adhesion promoter consisting of a triacrylate monomer of the acid type sold by the Sartomer company under the name SR9051.
- a mixture is made comprising 12% by weight of the mixture of precursors and 5% by weight of said dye with 83% by weight of MEK.
- the liquid composition thus obtained is filtered with a PTFE filter with a diameter of 0.2 micrometers then is deposited on the glass substrate coated with the stack by spin coating until it reaches a thickness of 5 micrometers.
- the layer thus obtained is hardened by UV irradiation (UVB dose of approximately 280 mJ/cm 2 , running speed of 10 m/min). 25
- UVB dose approximately 280 mJ/cm 2 , running speed of 10 m/min.
- B- Characterization of the glazing according to the invention The optical characterizations of the glazing as described above are carried out with a Lambda900 spectrophotometer from the company Perkin Elmer.
- the light factors (TL and RL) were measured according to the 5 standard ISO9050 (2003).
- Total solar transmittance (TTS) was measured according to ISO 13837 with convention “A” AM 1.5.
- the emissivity was calculated according to the criteria defined in the international standard NF EN 12898: 2001. In the context of 10 of the examples presented below, we consider that an emissivity of up to 30% is satisfactory and that beyond the material can no longer be used satisfactorily as insulating glazing.
- the main colorimetric data of the glazing according to the invention are reported in Table 2 below when the Epolight 7527C dye is used: [Table 2] 20
- the light transmission TL is effectively reduced by the colored layer.
- the resulting glazing visually appears dark blue in transmission, from inside the passenger compartment.
- the TTS measured according to the ISO 13837 convention A, AM1.5 standard is much lower than 20%, substantially equal to, or even lower than, the values obtained for the configurations of the prior art previously described and based on the use of PVB and/or or colored glass.
- the emissivity is less than 30% for both examples. According to the invention, it appears possible to easily modulate the light transmission T L , the total energy transmission of the glazing TTS and the emissivity ⁇ n by acting on the concentration of coloring agent. 5
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- Organic Chemistry (AREA)
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- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2204627A FR3135457B3 (fr) | 2022-05-16 | 2022-05-16 | Vitrage de toit monolithique pour automobile |
| PCT/EP2023/062660 WO2023222519A1 (fr) | 2022-05-16 | 2023-05-11 | Vitrage de toit monolithique pour automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4526267A1 true EP4526267A1 (fr) | 2025-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23726109.4A Pending EP4526267A1 (fr) | 2022-05-16 | 2023-05-11 | Vitrage de toit monolithique pour automobile |
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| Country | Link |
|---|---|
| EP (1) | EP4526267A1 (fr) |
| CN (1) | CN119255973A (fr) |
| FR (1) | FR3135457B3 (fr) |
| WO (1) | WO2023222519A1 (fr) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2721252B1 (fr) | 1994-06-17 | 1996-08-09 | Saint Gobain Vitrage | Vitrage feuilleté à faible transmission énergétique pour véhicule de transport. |
| DE19927683C1 (de) | 1999-06-17 | 2001-01-25 | Sekurit Saint Gobain Deutsch | Sonnen- und Wärmestrahlen reflektierende Verbundglasscheibe |
| US6911254B2 (en) * | 2000-11-14 | 2005-06-28 | Solutia, Inc. | Infrared absorbing compositions and laminates |
| DE10249263B4 (de) | 2002-10-23 | 2004-12-09 | Daimlerchrysler Ag | Verbundglasscheibe mit Wärmekomfortwirkung sowie deren Verwendung |
| 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. |
| DE102005016389A1 (de) | 2005-04-09 | 2006-10-12 | Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg | Verbundscheibe |
| ES2621478T3 (es) | 2012-01-10 | 2017-07-04 | Saint-Gobain Glass France | Luna transparente con recubrimiento conductor de electricidad |
| FR2985724B1 (fr) | 2012-01-16 | 2014-03-07 | Saint Gobain | Substrat muni d'un empilement a proprietes thermiques comportant quatre couches fonctionnelles metalliques. |
| FR3061074B1 (fr) | 2016-12-23 | 2021-05-28 | Saint Gobain | Vitrage feuillete colore |
| FR3064528B1 (fr) * | 2017-03-29 | 2019-04-05 | Saint-Gobain Glass France | Vitrage feuillete avec empilement de couches. |
| FR3064529A1 (fr) | 2017-03-29 | 2018-10-05 | Saint-Gobain Glass France | Procede de fabrication d'un miroir feuillete colore. |
| FR3084075B1 (fr) | 2018-07-18 | 2021-10-29 | Saint Gobain | Vitrage controle solaire ou bas emissif comprenant une couche organique de protection |
| FR3084074B1 (fr) | 2018-07-18 | 2020-07-17 | Saint-Gobain Glass France | Vitrage controle solaire ou bas emissif comprenant une couche organique de protection |
| BR112021023168A2 (pt) * | 2019-05-20 | 2022-01-04 | Agc Flat Glass Na Inc | Substrato revestido |
-
2022
- 2022-05-16 FR FR2204627A patent/FR3135457B3/fr active Active
-
2023
- 2023-05-11 EP EP23726109.4A patent/EP4526267A1/fr active Pending
- 2023-05-11 WO PCT/EP2023/062660 patent/WO2023222519A1/fr not_active Ceased
- 2023-05-11 CN CN202380040932.6A patent/CN119255973A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3135457B3 (fr) | 2024-05-24 |
| CN119255973A (zh) | 2025-01-03 |
| WO2023222519A1 (fr) | 2023-11-23 |
| FR3135457A3 (fr) | 2023-11-17 |
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