WO2020240589A1 - Vitrage de véhicule de protection solaire - Google Patents

Vitrage de véhicule de protection solaire Download PDF

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Publication number
WO2020240589A1
WO2020240589A1 PCT/IN2020/050474 IN2020050474W WO2020240589A1 WO 2020240589 A1 WO2020240589 A1 WO 2020240589A1 IN 2020050474 W IN2020050474 W IN 2020050474W WO 2020240589 A1 WO2020240589 A1 WO 2020240589A1
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WO
WIPO (PCT)
Prior art keywords
solar
glazing
protective vehicle
vehicle glazing
glass
Prior art date
Application number
PCT/IN2020/050474
Other languages
English (en)
Inventor
Soumyadeep MISRA
Ishamol L B
Original Assignee
Saint-Gobain Glass France
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 filed Critical Saint-Gobain Glass France
Publication of WO2020240589A1 publication Critical patent/WO2020240589A1/fr

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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
    • B32B17/10165—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
    • B32B17/10201—Dielectric coatings
    • 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
    • B32B17/10082—Properties of the bulk of a glass sheet
    • B32B17/1011—Properties of the bulk of a glass sheet having predetermined tint or excitation purity
    • 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
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • 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
    • B32B2255/28—Multiple coating on one surface

Definitions

  • the present disclosure relates, in general to a solar protective vehicle glazing, and more specifically to a solar protective vehicle glazing with enhanced durability & improved passenger experience with aesthetically pleasant reflectance color.
  • Solar control glazings have a large part to play in preventing the transmission of solar heat into buildings and passenger compartments of a vehicle.
  • vehicles such as cars, buses, railway carriages and also in aircrafts that have a number of window openings in their bodywork, into which these solar control glazings are fitted.
  • window openings include windscreens, rear window glazings, side window glazings and roof glazings.
  • the primary objective of these different glazings in the vehicle bodywork is to protect the vehicle occupants from solar radiation and thereby limit the solar heat gain of the vehicle. This is of significant relevance in instances where the vehicle is parked in an unshaded location and also for vehicles in countries with hot-humid climates.
  • glazings should also contribute to temperature regulation conditions in winter by avoiding heat lost outside the passenger compartments of a vehicle.
  • the glazings must have low-emission properties that counter the emission of energy radiation from the passenger compartments of a vehicle.
  • glazing should be capable of withstanding heat treatments without their reflectance color being substantially modified.
  • French patent application number 2676074 assigned to the assignee of the present disclosure discloses a solar protection glazing comprising a functional layer based on nickel, chromium and nitride deposited on a layer of titanium oxide. Further the functional layer is covered with a layer made of tantalum oxide or titanium oxide or titanium nitride. Said glazing finds application in building and automobile.
  • Canadian application number 2178033 discloses a pyrolytically formed glazing panel for solar screening properties for use in vehicle glazing such as sunroof.
  • the glazing panel comprises tin/antimony oxide coating layer and has a solar factor of less than 70%.
  • patent number 4,968,563 discloses a light transmitting glazing pane comprising a first coating of tin oxide provided on one of the glass faces and a second coating of titanium dioxide on the other face of the glass. Said glazing pane has a light transmission of at least 70% and a solar energy radiant transmissivity of 75%.
  • Yet another U.S. patent number 9,561,981 discloses a motor vehicle glass panel comprising a multilayer stack including a metal alloy layer of chromium and zirconium placed in between a first dielectric and a second dielectric layer.
  • the invention provided in the present disclosure addresses specific problem statements of existing prior art covering automotive glazing panels such as: (i) insufficient durability and (ii) unpleasant aesthetic properties, without compromising on the performance properties of the glazing panels such as light transmittance, solar factor and emissivity.
  • the present disclosure relates to a solar protective vehicle glazing that comprises at least one coated glass pane, which in turn comprises a multilayer stack on the face of the glass which faces the internal compartments of a vehicle.
  • the multilayer stack comprises a first dielectric layer, a solar-radiation absorbing layer, a second dielectric layer and an overcoat layer, the order of the layers moving away from the glass substrate.
  • the overcoat layer forms the outmost layer of the multilayer stack and protects the underlying stack from abrasion, scratch and chemical damages both during manufacturing as well as use of the coated glass pane in vehicle window openings that include windscreens, rear window glazings, side window glazings and roof glazings.
  • the multilayer stack is engineered to provide an aesthetically appealing experience for the passengers seated inside the vehicle while also retaining the performance characteristics of the glazing.
  • a solar protective vehicle glazing comprising at least one glass pane of coated glass.
  • the coated glass pane comprises a multilayer stack comprising a first dielectric layer, a second dielectric layer, a solar-radiation absorbing layer and an overcoat layer on the glass face which faces the compartments of the vehicle.
  • the solar-radiation absorbing layer is a nitride of a metal alloy comprising nickel and chromium placed between said first dielectric layer and said second dielectric layer.
  • the solar-radiation absorbing layer has nickel and chromium present in a ratio from >60: > 10 to ⁇ 90: ⁇ 40.
  • the first and second dielectric layers comprises of a material selected from the group consisting of silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, a mixed aluminum-silicon nitride, silicon oxynitride or aluminum oxynitride.
  • the overcoat layer comprises of a material selected from the group consisting of titanium oxide, titanium zirconium oxide, titanium zirconium hafnium nitride or silicon oxide.
  • the solar protective vehicle glazing is bendable and/or toughenable.
  • the solar protective vehicle glazing is partially opacified by a coating in the form of a lacquer or an enamel.
  • FIG. 1 illustrates a solar protective vehicle glazing, according to one embodiment of the present disclosure
  • FIG. 2 illustrates a solar protective vehicle glazing, according to another embodiment of the present disclosure
  • FIG. 3 illustrates calorimetric variation of coated glass samples after linear abrasion test, according to the present disclosure.
  • Embodiments disclosed herein are related to solar protective vehicle glazing having enhanced durability & improved passenger experience with aesthetically pleasant reflectance colors.
  • a solar protective vehicle glazing of the present disclosure comprises at least one coated glass 100, which according to one embodiment of the present disclosure is illustrated in FIG. 1.
  • the coated glass 100 comprises of a glass substrate 110 provided with a multilayer coating 200 on the glass face facing the internal compartments of the vehicle, for selectively blocking the solar radiation.
  • the thickness of each of the layers of the multilayer coating 200 is selected so that the coated glass 100 has a visible light transmission of at least 50%; and a solar factor of at most 75%.
  • the layers of the multilayer coating 200 are engineered in such a way that the coated glass 100 gives an aesthetically pleasant greyish or bluish grey color external reflection on the glass face exposed to the outside environment and a neutral color internal reflection on the coated side of the glass substrate 110 facing inside the vehicle.
  • the multilayer coating 200 exhibits utmost robustness to abrasions, scratches and provides resistivity to the coated glass 100 from all major chemical damages. Therefore, the resulting multilayer coating 200 has an enhanced life span that keeps vehicle glass replacements at bay.
  • Such a coated glass 100 having a high visible light transmissivity, good solar energy screening properties, appealing aesthetics and enhanced durability can be made to a suitable size and shape for incorporation into vehicle window openings such as windscreens, rear window glazings, side window glazings and roof glazings. While rear window glazings, side window glazings and roof glazings are monolithic, the windscreens are laminated. For the monolithic glazings the multilayer stack 200 is on the face of the glazing oriented towards the passenger compartments and for the laminated glazing the multilayer stack 200 are usually on face 2, 3 or 4 of the glazing, the faces of the glass being numbered from outside to the inside of the vehicle.
  • said coated glass 100 can further be useful to architects for use in the exterior facade of buildings.
  • the coated glass 100 has aesthetic qualities in reflecting the immediate environment and being available in a pleasant color for design opportunities as well having a neutral internal color for comfort of the building occupants.
  • Such coated glass 100 also have technical advantages by providing the occupants of a building with protection against solar radiation by absorption and eliminating the dazzling effects of intense sunshine, giving an effective filter against glare, enhancing visual comfort and reducing eye fatigue. Depending on the intended use, certain desired properties may be altered.
  • the glass substrate 110 can be made of a clear glass or a tinted glass of 4 mm thickness.
  • the choice of the glass substrate 100 influences the properties of the coated glass 100.
  • a green tinted 3.5 mm glass is used as the substrate for depositing the multilayer coating 200.
  • the multilayer coating 200 comprises of a solar-radiation absorbing layer 120 sandwiched between a first and second dielectric layer 130a, 130b and further an overcoat layer 140 placed above the second dielectric layer 130b away from the glass substrate 110.
  • the first dielectric layer 130a is in direct contact with the glass substrate 110 and the second dielectric layer 130b is provided above the solar- radiation absorbing layer 120.
  • the first and second dielectric layers 130a, 130b regulate the reflection, transmission and tint properties of the solar protective vehicle glazing 100 while the overcoat layer 140 protects the underlying layers against mechanical and chemical impairments.
  • the solar-radiation absorbing layer 120 comprises of a nitride of a metal alloy comprising nickel and chromium. This solar-radiation absorbing layer 120 is sputtered with Ar and N2 gas from a target consisting of nickel and Chromium alloy.
  • the Ni/Cr ratio present in the target to sputter absorbing layer 120 is 80:20.
  • the nickel and chromium present in the target can have a Ni/Cr ratio varying from >60: > 10 to ⁇ 90: ⁇ 40.
  • the Ar:N2 gas ratio varies from 80:20 to 20:80. Said ratio of the Ar:N2 gas during sputtering plays a significant role in controlling the color shift of the coated glass 100 after tempering and further assists in ensuring selective blockage of solar radiation
  • the solar-radiation absorbing layer 120 comprises from 40 % to 90 % of nickel; 10% to 20% of chromium and 20% to 50% of nitrogen. According to specific embodiments, the atomic concentration of elements present in the solar-radiation absorbing layer 120 is about 51% of nickel; about 15% of chromium and about 32% of nitrogen.
  • the thickness of the solar-radiation absorbing layer 120 is particularly maintained low in order to obtain a visible luminous transmission greater than 50%. In one embodiment of the present disclosure, the thickness of the solar-radiation absorbing layer 120 is less than 5 nm. The present disclosure particularly maintains a reduced thickness of the solar-radiation absorbing layer 120 in order to transmit a reasonable proportion of visible light so as to allow natural illumination to the interiors of the building or vehicle and in order to allow its occupants to see out. Thus it is desirable to increase the selectivity of the coating, that is to increase the ratio of the transmittance to the solar factor. Indeed, it is preferred that the selectivity be as high as possible.
  • the combination of nickel and chromium present in the solar- radiation absorbing layer 120 provides the coated glass 100 with the advantageous combination of a high solar factor and low emissivity.
  • the multilayer stack 200 of the present disclosure achieves a solar factor (SF) of less than 75% and an emissivity value of less than 90%.
  • SF solar factor
  • a low solar factor and a low emissivity value enhance user thermal comfort levels. Further, these properties play a major role in fuel economy of the vehicle by reducing the workload of the vehicle’s air conditioner.
  • the first and second dielectric layers 130a, 130b are based on silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, a mixed aluminum-silicon nitride, silicon oxynitride or aluminum oxynitride.
  • the first and second dielectric layers 130a, 130b is silicon nitride.
  • the presence of the first dielectric layer 130a on the glass substrate 110 has the particular benefit of inhibiting the migration of sodium ions from the glass substrate 110 by diffusion or otherwise into the solar-radiation absorbing layer 120 either during formation of that solar-radiation absorbing layer 120 or during a subsequent high temperature treatment.
  • the thickness of the first and second dielectric layers 130a, 130b are modified in such a way that the reflection color on the face of the glass substrate 110 facing the external environment is grey or bluish grey. This is verified by the coated glass 100 having a* ext value ranging between 1- and -5 and b* ext value ranging between -3 and -8. Alongside this, the reflection color of the face of the glass substrate 110 facing inside the compartments of the vehicle is maintained to be very neutral, wherein the a* mt , b* mt values range between 0 and -3.3. This helps to avoid discomfort to vehicle occupants especially during night where there is an internal source of light present inside the vehicle and the reflectance of the glass does not interfere with the light source inside the vehicle. Accordingly, the first dielectric layer 130a has a thickness ranging between 10 nm to 30 nm and the second dielectric layer 130b has a thickness ranging between 20 nm to 50 nm.
  • the overcoat layer 140 is based on titanium oxide, titanium zirconium oxide, titanium zirconium hafnium nitride or silicon oxide.
  • the primary function of the overcoat layer 140 is the mechanical and chemical protection of the underlying layers of the multilayer stack 200. Depending on its thickness as well as that of the underlying layers, it may also have an interferential role and thus contribute to the reflection aspect of the coated glass 100. Its thickness is at most 10 nm and preferably at least 5 nm. The actual thickness is chosen depending on the desired properties of the coated glass 100, bearing in mind the desirability of satisfactory visible light transmissivity coupled with efficient energy screening and suitable abrasion resistance.
  • the extent to which light is absorbed by the coated glass 100 increases with the thickness of the multilayer stack 200, but it is also necessary to take account of the interference effect of light which is reflected at the faces of the multilayer stack 200.
  • the addition of the overcoat layer 140 above the second dielectric layer 130b does not increase the overall thickness of the multilayer stack 200 effectively because of the very thin solar-radiation absorbing layer 120 which otherwise as in the prior art references are always more than 10 nm, especially at least more than 5 nm.
  • all the layers of the multilayer stack 200 are deposited one by one on the glass substrate 110 preferably by magnetron sputtering technique in a reactive atmosphere, but could be carried out by any vacuum deposition technique allowing good control over the optical performance of the various layers in the multilayer stack 200.
  • the layers of the multilayer stack 200 must also lend themselves to the forming of window glazings for vehicles. These are subjected to heat treatments during fabrication, especially the bending of coated glass, or during toughening intended to give the coated glass reinforced mechanical properties.
  • the layers of the multilayer stack 200 described in the present disclosure withstand these treatments without their properties being degraded. These treatments include temperatures which exceed 630° C for about 10 minutes. The layers of the multilayer stack 200 conserve their properties when subjected to such extreme temperatures.
  • the solar protective vehicle glazing of the present disclosure has a colorimetric variation in transmission (DE*t), glass side-reflection and coating side-reflection (AE* Rg & AE* Rc ) less than 2, when the coated glass 100 is subjected to a temperature above 630° C and below 670° C for a time period of 7 - 10 minutes.
  • the present invention presents the advantage of simultaneously providing a solar factor (FS) below 75%, an emissivity of less than 90% (preferably less than 80%), a luminous transmittance (TL) of more than 50%, neutral internal reflection and pleasant grey or bluish grey color external reflection.
  • FS solar factor
  • TL luminous transmittance
  • a solar protective vehicle glazing comprising of a coated glass 100 according to one specific embodiment of the present disclosure is illustrated in FIG. 2.
  • the coated glass 100 illustrated here is heat treatable and exhibits a bluish grey reflection color in the face of the glass substrate exposed to the external environment and a neutral internal reflection color increasing visual comfort of passengers seated inside the vehicle fitted with such a glazing.
  • the transparent glass substrate 110 is provided with a multilayer coating 200 comprising a nickel chromium nitride layer 120 sandwiched between two dielectric layers 130a, 130b based on silicon nitride.
  • An overcoat layer 140 made from titanium oxide is placed over the second dielectric layer 130b based on silicon nitride.
  • the nickel chromium nitride layer 120 is very thin ranging in thickness between 0.1 nm and 5 nm.
  • the nickel chromium nitride layer 120 absorbs the infrared radiation from the sun and attributes to the solar control properties of the heat treatable solar protective vehicle glazing.
  • the solar control properties depend entirely on the thickness of the nickel chromium nitride layer 120
  • the light transmission (T L ) of the heat treatable solar protective vehicle glazing is invariably proportional to the thickness of the nickel chromium nitride layer 120.
  • T L the light transmission
  • the thickness of the silicon nitride layer 130a present above the transparent glass substrate 110 ranges between 10 nm and 30 nm and the thickness of the silicon nitride layer 130b present above the nickel chromium nitride layer 120 ranges between 20 nm and 50 nm.
  • the silicon nitride dielectric layer 130a, 130b contribute to the reflection color of the heat treatable solar protective vehicle glazing and hence are designed in such a way to provide thermal and visual comfort to the passengers sitting inside the vehicle fitted with such a glazing.
  • the multilayer coating 200 has -13% external reflection and provides a very subtle appearance.
  • the heat treatable solar protective vehicle glazing may be enameled.
  • the heat treatable solar protective vehicle glazing may be subjected to strengthening, toughening or bending by exposing the glazing to a temperature not exceeding 670 °C.
  • the multilayer coating 200 is heat treatable and the transparent glass substrate 110 coated with the multilayer coating 200 can be heat treated to a temperature as high as 630 °C for about 10 minutes.
  • the DE* value (change in color of the heat treatable solar protective vehicle glazing before and after heat treatment) is less than 2.
  • the solar protective vehicle glazing can be constituted as a laminate in which the coated glass 100 is bonded to at least one other glass pane through an intervening adhesive material. In which case the multilayer stack 200 is placed inside surface of the exterior laminate.
  • Such laminated glazings afford advantages of safety especially when used in a vehicle windscreen.
  • a further advantage of the use of laminate is that it enables the solar radiation screening coating to be located within the thickness of the laminate where it is protected against abrasion during use.
  • the solar protective vehicle glazing when used as windscreens can be enameled on the PCB region for obtaining opaque black edging.
  • R ext External reflection
  • a*G, b*G a*, b* values measured on the external side, i.e., the glass side
  • Ri nt Internal reflection
  • a*C, b*C a*, b* values measured on the internal side, i.e., the coating side
  • Sample 1 and 2 have the same multilayer stack deposited on a tinted and a clear glass substrate, respectively to demonstrate the effect of the substrate on the optical and performance properties of the coated glasses.
  • the thickness of the layers of the multilayer stacks are optimized for obtaining the desired optical and performance properties depending on the type of the glass substrate used for the sputtering.
  • the solar factor of 51% exhibited by sample 1 provides a maximum of 27% drop over the base glass substrate use.
  • the coated glass produced from the multilayer stack provided according to the teachings of the present disclosure efficiently block solar radiation.
  • T L luminous transmission
  • R ext External reflection
  • a*G, b*G a*, b* values measured on the external side, i.e., the glass side
  • Ri nt Internal reflection
  • a*C, b*C a*, b* values measured on the internal side, i.e., the coating side
  • both the later stacks 1 and 2 have DE* values less than or equal to 1 in both color and transmittance. This property brings high color matchability between heat treated and the untreated coated glass samples of the present disclosure.
  • coated glass samples are aimed to be used as automotive glazings, it is inevitable that the samples have good abrasion and scratch resistance.
  • the following durability studies were performed for the coated glass substrates samples of the present disclosure.
  • the brush test was used to evaluate the resistance of the coated glass samples to abrasion caused by a nylon brush used as the abrader. In this test a soft nylon brush is rubbed against the coating where the coating is submerged in the water. This test is done to test mechanical robustness of the multilayer stack of the present disclosure against washing machine brushes during processing.
  • the samples were tempered at a temperature of 630 °C after the Erichsen brush test. This step reveals the presence of any minor scratches that occurred during the test procedure. However, the tested samples did not show any sign of scratches.
  • the coated samples were first tempered at a temperature above 630 °C and then subjected to the Erichsen brush test procedure. Again the samples did not show any sign of minor scratch or coating erosion. Further the calorimetric variation was measured to be less than 2.
  • Taber abrasion test was used for performing accelerated wear resistance testing. It involved mounting a flat coated glass sample of approximately 100 mm 2 to a turntable platform that rotate on a vertical axis at a fixed speed. The wear action was carried out by two rotating abrading wheels supported on a loading arm which applied 250 grams pressure against the specimen, exclusive of the weight of the wheel in contact with the coated glass sample. The transmission before and after the test were measured to calculate the overall change in transmission of the test samples. The results of mechanical durability studies are summarized in Table 5.
  • coated glass samples passed the chemical durability testing performed using the EN 1096 norm.
  • a sealing lip was designed and used as the abrader for up to 10,000 cycles of testing under dynamic conditions of dry, water, oil and dust.
  • the overcoat layer 140 of the multilayer stack 200 of the present disclosure protects the underlying stack from the abrasion and scratch generated from the above experiment.
  • Glass samples prepared with a multilayer stack comprising Si3N4/NiCrN/Si3N4, without the overcoat layer 140 of the present disclosure do not exhibit such enhanced abrasion and scratch resistance as illustrated by the glass samples prepared according to the teachings of the present disclosure provided with multilayer stack comprising Si3N4/NiCrN/Si3N4/Ti02.
  • the overcoat layer is significant for providing enhanced mechanical durability to the glass samples while retaining other desired characteristics of the glazings described in the starting of this disclosure.
  • the solar protective heat treatable glazing described in the present disclosure finds application as a glazed element in vehicles: sunroof, windshield, side window, rear window and a glazing element of building.
  • the solar protective vehicle glazing of the present disclosure has advantage of simultaneously providing a solar factor (FS) below 75%, an emissivity of less than 90 (preferably less than 80%), a luminous transmittance (TL) of more than 50%, neutral internal reflection and pleasant grey or bluish grey color external reflection.
  • FS solar factor
  • TL luminous transmittance
  • the glazing according to the present disclosure obviously also finds its application as a glazed element of a building.
  • the glazing may form a double or triple glazing with the multilayer stack arranged facing the closed space inside the multiple glazing.
  • the glazing may also form a laminated glazing whose multilayer stack may be in contact with the thermoplastic adhesive material connecting the substrates, in general PVB.
  • the glazing according to the invention is, however, particularly useful when the multilayer stack is facing the outer environment, whether it is a single glazing or a laminated glazing, but also optionally a multiple glazing.
  • the solar protective vehicle glazing of the present disclosure can also be enameled, strengthened or toughened.
  • the extensive durability of the solar protective vehicle glazings provides for an extended life of the product.
  • the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion.
  • a method, article, or apparatus that comprises a list of features is not necessarily limited only to those features but may include other features not expressly listed or inherent to such method, article, or apparatus.
  • “or” refers to an inclusive-or and not to an exclusive-or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
  • TITLE A SOLAR PROTECTIVE VEHICLE GLAZING

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  • Surface Treatment Of Glass (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un vitrage de véhicule de protection solaire comprenant au moins une vitre en verre revêtu comprenant un empilement multicouche sur la face en verre faisant face aux compartiments internes d'un véhicule. L'empilement multicouche comprend une couche d'absorption de rayonnement solaire constituée de nitrure de chrome de nickel enserrée entre une première couche diélectrique et ladite seconde couche diélectrique et recouverte en outre d'une couche de finition constituée d'oxyde de titane, d'oxyde de titane et de zirconium, de nitrure de hafnium et de zirconium et d'oxyde de silicium. Le vitrage de véhicule de protection solaire selon la présente invention présente l'avantage de fournir simultanément un facteur solaire (FS) inférieur à 75 %, une émissivité inférieure à 90 % (de préférence inférieure à 80 %), une transmittance lumineuse (TL) supérieure à 50 %, une réflexion interne neutre et une réflexion externe de couleur gris bleu ou gris agréable.
PCT/IN2020/050474 2019-05-31 2020-05-27 Vitrage de véhicule de protection solaire WO2020240589A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4100191A4 (fr) * 2020-02-04 2024-01-10 Saint-Gobain Glass France Article revêtu comprenant des couches de finition protectrices composées de nitrure de titane, de zirconium et d'hafnium et de carbone

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022123595A1 (fr) * 2020-12-08 2022-06-16 Saint-Gobain Glass France Article revêtu de commande solaire doté d'une résistance améliorée à la corrosion

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Publication number Priority date Publication date Assignee Title
US9944553B2 (en) * 2013-06-27 2018-04-17 Agc Glass Europe Solar protection glazing

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9944553B2 (en) * 2013-06-27 2018-04-17 Agc Glass Europe Solar protection glazing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4100191A4 (fr) * 2020-02-04 2024-01-10 Saint-Gobain Glass France Article revêtu comprenant des couches de finition protectrices composées de nitrure de titane, de zirconium et d'hafnium et de carbone

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