CA2235541A1 - Glass article having a solar control coating - Google Patents
Glass article having a solar control coating Download PDFInfo
- Publication number
- CA2235541A1 CA2235541A1 CA002235541A CA2235541A CA2235541A1 CA 2235541 A1 CA2235541 A1 CA 2235541A1 CA 002235541 A CA002235541 A CA 002235541A CA 2235541 A CA2235541 A CA 2235541A CA 2235541 A1 CA2235541 A1 CA 2235541A1
- Authority
- CA
- Canada
- Prior art keywords
- coating
- glass article
- interlayer
- transparent coating
- coated glass
- 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.)
- Abandoned
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 191
- 239000011521 glass Substances 0.000 title claims abstract description 172
- 239000011248 coating agent Substances 0.000 title claims abstract description 158
- 238000002834 transmittance Methods 0.000 claims abstract description 76
- 239000000758 substrate Substances 0.000 claims abstract description 68
- 239000011229 interlayer Substances 0.000 claims abstract description 49
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 39
- 229910001887 tin oxide Inorganic materials 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 239000010410 layer Substances 0.000 claims description 33
- 229910003437 indium oxide Inorganic materials 0.000 claims description 25
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 claims description 25
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 24
- 230000007935 neutral effect Effects 0.000 claims description 21
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 18
- 239000005329 float glass Substances 0.000 claims description 15
- 239000000377 silicon dioxide Substances 0.000 claims description 15
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 12
- 229910052731 fluorine Inorganic materials 0.000 claims description 12
- 239000011737 fluorine Substances 0.000 claims description 12
- 239000011787 zinc oxide Substances 0.000 claims description 12
- 229910044991 metal oxide Inorganic materials 0.000 claims description 10
- 150000004706 metal oxides Chemical class 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 9
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052793 cadmium Inorganic materials 0.000 claims description 4
- 229940071182 stannate Drugs 0.000 claims description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052787 antimony Inorganic materials 0.000 claims description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 3
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- BNEMLSQAJOPTGK-UHFFFAOYSA-N zinc;dioxido(oxo)tin Chemical compound [Zn+2].[O-][Sn]([O-])=O BNEMLSQAJOPTGK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 2
- 238000006124 Pilkington process Methods 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 9
- 230000005855 radiation Effects 0.000 description 9
- 235000012239 silicon dioxide Nutrition 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000003086 colorant Substances 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 239000008199 coating composition Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- 238000001429 visible spectrum Methods 0.000 description 4
- 239000000969 carrier Substances 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 238000001755 magnetron sputter deposition Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 108091006149 Electron carriers Proteins 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000005328 architectural glass Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- PKKGKUDPKRTKLJ-UHFFFAOYSA-L dichloro(dimethyl)stannane Chemical compound C[Sn](C)(Cl)Cl PKKGKUDPKRTKLJ-UHFFFAOYSA-L 0.000 description 1
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- GRPQBOKWXNIQMF-UHFFFAOYSA-N indium(3+) oxygen(2-) tin(4+) Chemical compound [Sn+4].[O-2].[In+3] GRPQBOKWXNIQMF-UHFFFAOYSA-N 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910003455 mixed metal oxide Inorganic materials 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/281—Interference filters designed for the infrared light
- G02B5/282—Interference filters designed for the infrared light reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
-
- 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
-
- 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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
- C03C17/3417—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
- C03C17/3429—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials at least one of the coatings being a non-oxide coating
- C03C17/3435—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials at least one of the coatings being a non-oxide coating comprising a nitride, oxynitride, boronitride or carbonitride
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
- C03C17/3429—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials at least one of the coatings being a non-oxide coating
- C03C17/3441—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials at least one of the coatings being a non-oxide coating comprising carbon, a carbide or oxycarbide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
Abstract
A glass article having a solar control coating is disclosed for use in producing heat reducing glass for architectural windows. The coated article includes a glass substrate, an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate. At least a first transparent coating deposited on and adhering to the surface of the iridescence-suppressing coating and at least a second transparent coating deposited on and adhering to the surface of the first transparent coating. The first transparent coating and the second transparent coating have a difference in refractive indices in the near infrared region greater than a difference in the refractive indices in the visible region. The use of the article in architectural glazing results in a glazing that rejects solar energy in the near infrared region while permitting the transmittance of a high degree of visible light.
Description
CA 0223~41 1998-04-22 WO 98/lOg22 PCT/US97/15914 GLASS ARTICLE HAVING A SOLAR CONTROL COATING
R~CK~RoUNn OF TH~ I NV~ ON
1. Fiel~ of the Tnvent;on This invention relates to a coated gla~s article having a solar r~ollL~ol coating. More particularly, this invention relates to a coating stack of an iridescence-suppressing interlayer, a first transparent coating, and aseco~ transparent coating on a glass substrate that results in an article having a high degree of selectivity between the visible and near infrared regions of the spectrum. The selectivity, or the transmittance of visible light and the attenuation of near infrared energy, is accomplished through the utilization of at least first and second transparent coatings having similar refractive indices in the visible region while possessing different refractive indices in the near infrared region. Preferred coated glass articles exhibit a neutral color with the coating applied to a clear glass substrate.
R~CK~RoUNn OF TH~ I NV~ ON
1. Fiel~ of the Tnvent;on This invention relates to a coated gla~s article having a solar r~ollL~ol coating. More particularly, this invention relates to a coating stack of an iridescence-suppressing interlayer, a first transparent coating, and aseco~ transparent coating on a glass substrate that results in an article having a high degree of selectivity between the visible and near infrared regions of the spectrum. The selectivity, or the transmittance of visible light and the attenuation of near infrared energy, is accomplished through the utilization of at least first and second transparent coatings having similar refractive indices in the visible region while possessing different refractive indices in the near infrared region. Preferred coated glass articles exhibit a neutral color with the coating applied to a clear glass substrate.
2. ~mm~ry of Rel~te~ ~rt Coatings on architectural glass are commonly utilized to provide specific energy attenuation and light transmittance properties. Additionally, coatings provide desired reflective or spectral properties that are aesthetically pleasing. The coated articles are often used singularly or in combination with other glass articles to form a glazing or window unit.
The attributes of a coated glass substrate are dependent upon the specific coatings applied to the CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 substrate. The coating compositions and thicknesses impart energy attenuation and light transmittance properties within the coated article while also affecting the spectral properties. Desired attributes may be obtainable by adjusting the compositions or thicknesses of the coating layer or layers. However, adjustments to enhance a specific property can adversely impact other transmittance or spectral properties of the coated glass article. Obtaining desired spectral properties is often difficult when trying to combine specific energy attenuation and light transmittance properties in a coated glass article.
It is desirable to produce a coated glass article, especially for use in architectural glazings, that is capable of attenuating both near infrared and far infrared energy while permitting a high degree of visible light transmittance. Furthermore, it is preferred that the glazing possess a neutral color in both transmittance and reflectance to gain acceptance for use in homes and buildings. The attenuation of the near infrared and the far infrared energy may occur through either reflection or absorption. However, the reflection of the radiation is preferred in order to reject the radiation from the system. The reflection of near infrared energy results in a reduced solar transmittance while the reflection of the far infrared energy provides for a low emittance. The low emittance minimizes the indirect solar heat gain from absorption.
U.S. Patent No. 4,504,l09 to Taga et. al. discloses an infrared shielding lamination comprising alternate infrared shield layers and interferential reflection layers on a transparent substrate. The infrared shield CA 0223~s41 1998-04-22 W O 98/10922 PCT~US97/15914 layers reflect energy in the near infrared spectrum. A
coated substrate having the lamination in accordance with the patent reflects infrared and near infrared without impairing the visible light transmittance.
U.S. Patent No. 4,507,547 issued to Taga et. al.
discloses a heat wave shielding lamination utilizing two types of infrared shield layers, each having different optical characteristics, laminated alternatively onto a glass substrate. The infrared shield layers have different refractive indices in the infrared spectrum but similar refractive indices in the visible light region to permit the passing of visible light while rejecting infrared energy.
In general, coated glass articles, such as described }5 in U.S. Patents 4,504,109 and 4,507,547, often exhibit iridescence or interference colors in reflected and transmitted light. It is desirable to provide architectural glazings free from iridescence, and preferably exhibiting a clear neutral color in both transmittance and reflectance. The iridescence from coatings on glass is an objectionable feature which is unacceptable for architectural applications.
Thus, the prior art suggests coatings on glass that are capable of reflecting near infrared energy while permitting the transmittance of visible light. However, conventional coatings or coating stacks do not suggest a coating means that permits both a desirable degree of selectivity between transmitted light and infrared energy and with freedom from iridescence (and thus capable of exhibiting a neutral color in both transmittance and reflectance on a clear glass substrate).
-CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 It would be advantageous to provide a coated glass article having a high degree of selectivity between visible light and near infrared energy. The high degree of selectivity would permit the transmittance of visible light while attenuating a significant amount of infrared energy. The attenuation of near infrared energy results in a reduced solar energy transmittance and therefore a low shading coefficient. The lower shading coefficient coupled with the transmittance of a high degree of visible light are desirable properties for architectural glazings.
It would also be advantageous to provide the solar reducing glazing that has an aesthetically pleasing neutral color in both transmittance and reflectance without exhibiting iridescence.
It would be a further advantage to provide a solar reducing glazing that minimizes the indirect heat gain from absorption. A low solar energy transmittance, and a high total solar reflection would significantly improve energy costs in buildings and homes.
SUMMA~Y OF T~ T~V~TTON
In accordance with the present invention, there is provided a novel glass article useful for producing coated, heat reducing glass for architectural windows.
The coated article includes a glass substrate, an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate, at least a first transparent coating deposited on and adhering to the surface of the iridescence-suppressing coating, and at least a second transparent coating deposited on and adhering to the surface of the first transparent coating.
The use of the present inventive article in architectural CA 0223~41 1998-04-22 WO98110922 PCT~S97/15914 glazings results in a glazing that rejects solar energy while permitting the transmittance of a high degree of visible light.
The specific coating stack on a clear glass substrate provides an iridescence free coated article having a high visible light transmittance and a reduced total solar energy transmittance. For example, a coated glass article made in accordance with the present invention may exhibit a visible light transmittance (Illuminant C) of at least ten percentage points higher than a solar heat transmittance with air mass l.5 on a clear 3 mm glass substrate.
In accordance with the present invention, the iridescence-suppressing interlayer of the coating stack on the glass substrate provides a means to reflect and refract light to interfere with the observance of iridescence. The layer specifically eliminates iridescence so that the coated article may, if desired, be neutral colored in both reflectance and transmittance.
Furthermore, the interlayer suppresses the observance of off angle colors. Single layer, multiple layer, or gradient layer color suppression coatings are suitable for use with the present invention.
The first transparent coating and the second transparent coating of the present invention have a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible light region. The difference in refractive indices in the near infrared region provides an interface that serves to reflect near infrared radiation. The similar refractive indices in the visible region permits the transmittance of a high degree of visible light.
CA 0223~41 1998-04-22 WO98/10922 PCT~S97/1ss14 The first transparent coating is generally a doped metal oxide, a doped mixed metal oxide, or metal nitride.
The second transparent coating is generally a metal oxide or mixed oxide with silica. The selection of the first and second transparent coatings is made in accordance with prescribed refractive indices to produce the desired transmittance properties. The noted coatings may also possess a low emissivity to minimize heat gain in an architectural glazing.
It is an object of the present invention to provide a coated, heat reducing glass article suitable for use as an architectural glazing. The coated glass article of the present invention transmits a high degree of visible light and reflects a significant amount of near infrared energy.
The present invention utilizes at least a first transparent coating and a second transparent coating that have a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible light region. The difference in refractive indices in the near infrared region provides an interface that serves to reflect near infrared radiation.
The similar refractive indices in the visible region permits the transmittance of a high degree of visible light. The attenuation of near infrared energy results in a coated article having a reduced solar energy transmittance.
It is a further object of the present invention to provide an architectural glazing having a low emittance to minimize the indirect gain from absorption. The first transparent coating of the present invention is generally a low emissivity coating that lowers the overall emittance of the coated glass article.
CA 0223~41 1998-04-22 It is also an object of the present invention to provide a coated glass article suitable for use as an architectural glazing having a neutral color in both reflectance and transmittance while maint~;ning the desired visible light transmittance. The coating stack of the present invention includes an iridescence-suppressing interlayer that is specifically applied to interfere with the observance of iridescence and thereby making possible the maintenance of a neutral color.
n~T~TT~n n~cRTpTToN OF T~ pR~F~RR~n ~RODT~T
In accordance with the present invention, it has surprisingly been discovered that a coated glass article having a multilayered coating including an iridescence-suppressing layer, at least a first transparent coating,and at least a second transparent coating, provides an article which attenuates a significant amount of near infrared energy while permitting the transmittance of a high degree of visible light. The coated glass article is especially suitable for use in architectural glazings and windows. However, the coated glass article of the present invention may also be suitable for other applications, such as vehicle windows.
The glass substrates suitable for use in preparing the coated glass article according to the present invention may include any of the conventional clear or tinted glass compositions known in the art as useful for the preparation of architectural glazings. The preferred substrate is a clear float glass ribbon wherein the coatings of the present invention are applied in the heated zone of a float glass process. Other tinted substrates may be utilized as a substrate for the CA 0223S~41 1998-04-22 application of the coatings of the present invention.
Tinted substrates may be selected to impart specific spectral properties in the coated article.
The iridescence-suppressing interlayer of the present invention provides a means to reflect and refract light to interfere with the observance of iridescence.
Iridescence-suppressing coatings are conventionally known within the art. For example, U.S. Patent Nos. 4,187,336, 4,419,386, and 4,206,252 herein incorporated by reference, describe coating techniques suitable for suppressing interference colors. The interlayer of the present invention may comprise a single iridescence-suppressing coating, a two component coating, or a gradient coating.
The color of light transmitted and reflected from coated glass substrates is measured according to the CIELAB color scale coordinates of a* and b*. A positive a* number indicates a red color hue and a negative value indicates a green color hue. A positive b* indicates yellow while a negative value indicates blue. A color saturation value, c*, is related to the observance of iridescence colors and is defined as the square root of a*2 + b*2. A coated glass article having a saturation value or c* of less than 12 units will not exhibit iridescence.
With a single component interlayer, the suppression of iridescent colors may be accomplished by selecting an interlayer having a refractive index intermediate between the refractive indices of the glass substrate and the coating deposited onto the interlayer. The intermediate refractive index results in the reflections from the interfaces having the same wavelength. An interlayer thickness selection of 1/4 wavelength of a 500 nm design CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 wavelength serves to cancel out the reflected waves and therefore suppress iridescence. Compounds suitable for use include metal oxides or metal nitrides. The most preferred composition is a silicon oxycarbide.
In a two component interlayer, the coating deposited onto and adhering to the glass substrate has a high refractive index in the visible spectrum. A second coating, having a low refractive index, is deposited on and adheres to the first coating of the interlayer. Each interlayer has a thickness selected such that the interlayer forms a combined total optical thickness of about l/6th to about l/12th of a 500 nm design wavelength.
The coatings suitable for use as high refractive index coatings include various metal oxides and nitrides, and their mixtures which have the proper refractive index.
The preferred coating for use with the present invention is tin oxide. The low index coating of the interlayer may include silicon dioxide, silicone polymer, magnesium oxide, and cryolite, with silicon dioxide being the preferred coating.
In accordance with the present invention, a gradient coating may be utilized as an iridescence-suppressing layer. A gradient coating generally comprises a layer which gradually transitions from one metal oxide or nitride film to another. Thus, the varying compositions result in a varying refractive indices which suppress iridescent colors. For example, a single gradient coating may include silica which gradually transitions into a tin oxide, cadmium stannate, silicon nitride, titanium oxide, or indium oxide.
CA 0223~S41 1998-04-22 W O 98/10922 PCTrUS97/15914 The iridescence-suppressing interlayers are suitably applied onto the glass substrate through conventional thin film coating applications. For example, the layers may be applied onto a float glass substrate in the heated zone of a float glass process by known chemical vapor deposition tec~niques or other known pyrolytic techniques.
The first transparent coating and the second transparent coating in the multilayer stack of the present invention are designed to reflect a significant amount of near infrared energy above 700 nm to about 2000 nm while transmitting a high degree of visible light between 400 nm to 700 nm, with respect to integrated values. Either coating may also absorb near infrared radiation thus further reducing the solar energy transmittance of the coated article.
The reflection of the near infrared energy is accomplished through the use of high and low refractive indices with a design wavelength in the near infrared region. The difference between the high and low index layers increases the width of the reflection zone in the near infrared region to reject near infrared radiation.
The transmittance of visible light is accomplished by selecting first and second transparent coatings with similar refractive indices in the visible spectrum. The refractive indices in the visible region of the selected transparent coatings should be within about 0.2 units of each other. The similar refractive indices permit the transmittance and reflectance of light in a neutral color.
Furthermore, the similarity in refractive indices in the visible spectrum enable the use of the noted interlayer for color suppression, since the first and second layers act as a single layer in the visible spectrum.
CA 0223~41 1998-04-22 WO g8/10922 PCTtUS97/15914 The first transparent coating of the present invention is deposited onto and adheres to the surface of the iridescence-suppressing interlayer. The first transparent coating may include a con~llctive coating which S also provides a low emissivity value. The conductivity may be imparted to the coating through known doping agents. The doped oxides have a very low refractive index in the near infrared region due to the free electrons in the material and therefore permit the selection of a second transparent coating with a high refractive index to build a near infrared reflecting area at the interface between the first and second transparent coatings.
In accordance with the present invention, the first transparent coating may be selected from the group consisting of indium oxide doped with tin, indium oxide doped with fluorine, tin oxide doped with fluorine, tin oxide doped with antimony, zinc oxide doped with aluminum, zinc oxide doped with fluorine, zinc oxide doped with boron, cadmium stannate, zinc stannate, tungsten oxide, tungsten oxide doped with fluorine, titanium nitride, and vanadium nitride. The preferred compound is indium oxide doped with tin.
The conductivity of the oxides is dependent upon the electron carrier density of the coating and the electron mobility. The free carriers also provide for the attenuation of near infrared energy through absorption.
Therefore, near infrared energy not reflected by the difference in refractive indices between the first and second transparent coatings may be absorbed by the free carriers in the first transparent coating. Additionally, the free carriers reflect some of the far infrared radiation. The result is a combination of both-the CA 0223~41 1998-04-22 WO98/1~22 PCT~S97/15914 reflection and absorption for the attenuation of solar energy. The preferred carrier density of the conductive films is greater than 5xl02~ per cubic centimeter.
Thus, the first transparent coating may additionally include low emissivity properties that minimizes heat gain through absorption. The low emittance of the coating minimizes the indirect gain from absorption for summer use and also produces a coated article having a low U value for winter use. The low emittance coating limits the inward transmission of radiant heat from the glass following the absorption of radiation.
The first transparent coating is deposited onto the coated substrate through the use of conventional deposition ~echniques. For example, the coating may be applied onto a glass ribbon substrate in the heated zone of a float glass production process. Other conventional methods of depositing the first transparent coating are suitable for use with the present invention.
In accordance with the present coated article, a second transparent coating is deposited on and adheres to the surface of the first transparent coating. The transparent coating has a refractive index in the near infrared region different than the refractive index for the first transparent coating. Examples of coating compositions suitable for use with the present invention include tin oxide, titanium oxide, aluminum oxide, indium oxide, zinc oxide, or a metal oxide mixed with silica.
The preferred coating composition is tin oxide.
The ~con~ transparent coating of the present invention may be prepared by conventional processes known in the art. For example, a suitable coating may be deposited onto the first transparent coating through the CA 0223~41 1998-04-22 decomposition of an organometallic or other metallic compound, or mixtures thereof, in an oxidizing atmosphere.
Other methods of applying metal oxide coatings, or metal oxide coatings mixed with silica, onto a substrate are suitable for practicing the present invention.
An intermediate coating, similar to the second transparent coating, may be applied onto the iridescence-suppressing interlayer prior to applying the first transparent coating. The deposition of the intermediate coating results in a coating stack having a layer with a low refractive index in the near infrared region placed between layers with high refractive indices in the near infrared region. The high/low/high design attenuates near infrared energy by establishing a broader reflection zone to reflect near infrared energy. The layers all have similar refractive indices in the visible region to permit the transmittance of a high degree of visible light. An alternative low/high stack design, with the high refractive index film as the outer coating, may be repeated at least once on the first high/low/high stack to further improve the attenuation of near infrared energy.
Coating compositions used for the second transparent coating are suitable for use with the intermediate coating.
The coated glass article of the present invention may include a glass substrate of any thickness which may be practiced in accordance with the float glass process.
However, the preferred glass substrate is 0.125 inch clear glass. The thicknesses of the first and second transparent layers is dependent upon the desired solar performance of the stack. For example, the thickness of the first transparent layer may range from 2500 to 4500 CA 0223~41 1998-04-22 WO98/10922 PCT~S97115914 angstroms while the second transparent layer may range from 800-1500 angstroms thick. For the alternative embodiment, the intermediate coating may range from 800-1500 angstroms thick.
The multilayered coatings of the present invention on a clear glass substrate may result in a coated glass article exhibiting neutral color in both reflectance and transmittance. The color is defined by the composition and thickness of the stack. The reflective color, measured from the glass substrate side of the coated article and defined on the CT~TAR color scale system, preferably has an a* value of about 0 and a b* value of about 0. The transmitted color of the coated article, measured from the coated side of the coated article and defined on the CIELAB color scale system, preferably has an a* value of about -2 and a b* value of about -4. The transmitted and reflected color of the article are preferably aesthetically neutral, with the color saturation of the article, c*, as defined by the square root of a2+b 2, less than 12 units.
The resulting coated article of the present invention, when applied to a nominal 3 mm clear glass substrate, exhibits a visible light transmittance (Illuminant C) of at least lO percentage points higher than a total solar heat transmittance integrated with air mass 1.5, as defined in ASTM E891-87. With the preferred coating article of a nominal 3mm clear glass substrate, tin oxide, silicon dioxide, indium oxide doped with tin, and tin oxide, the visible light transmittance (Illuminant C) is at least 60~ and the total solar heat transmittance less than 50%. The low solar heat transmittance of the CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 coated glass article results in a shading coefficient no greater than 0.65.
The coated glass article is ideally suited for use in architectural glazings. For example, the coated glass article may be utilized in an insulated glass unit wherein the article of the present invention functions as an outboard lite with a second clear glass article used as an i nho~ rd lite.
The insulated glass unit minimizes the heat transfer from the absorbing lite or clear glass substrate into the interior of the structure. The indirect gain, or the transmission of the absorbed radiation, is minimized if a low emissivity coating is utilized for the first transparent coating. The low emittance glass reflects or redirects the radiant heat generated from a warm object back toward the source. Additionally, the coated glass substrate is the exterior glass panel which enables outside convection from wind to minimize heat flow to the interior. The combination of the low emittance and near infrared attenuation properties of the present invention result in an insulated glass unit which rejects solar heat in the summer and exhibits a low U value, or retains heats, in the winter.
According to the preferred embodiment of the invention, an insulated glass unit, utilizing the coated glass article of the present invention, exhibits specific transmittance and spectral properties. The solar heat transmittance of the insulated glass unit is less than 50%. The insulated glass unit also exhibits a visible light transmittance (Illuminant C) greater than 60~ and preferably greater than 65%. The shading co-efficient of the unit is no greater than 0.65. The insulated glass CA 0223~41 1998-04-22 WOg8/10922 pcT~s97ll5sl4 unit has an effective emittance value of less than 0.2.
The low emittance value corresponds to a U value of less than 0.5.
The insulated glass unit preferably exhibits a neutral color in both reflectance and transmittance. The color saturation value of the unit, as defined on the CIELAB color scale system, is about 12 with a preferred value of about 8.
The following examples, which constitute the best mode presently contemplated by the inventor for practicing the present invention, are presented solely for the purpose of further illustrating and disclosing the present invention, and are not to be construed as a limitation on, the invention:
Example I
A clear glass substrate was provided for depositing the coatings of the present invention. The glass substrate was 0.125 inch thick section of float glass ribbon previously produced in a float glass production process. An iridescence-suppressing interlayer was deposited onto the surface of the glass substrate in the heated zone of a float glass production process. The iri~Pscence-suppressing layer included a tin oxide coating of 250 angstroms deposited on and adhered to the glass substrate. The tin oxide was applied by chemical vapor deposition in the heated zone of the float glass process by introducing dimethyl tin dichloride in an oxidizing atmosphere over the surface of the substrate.
A silicon dioxide coating of about 250 angstroms thick was applied onto the surface of the tin oxide coating by reacting dichlorosilane, in the pr~C~n~e of CA 0223~41 1998-04-22 WO98/1~22 PCT~S97tl5914 oxygen, near the surface of the substrate in the heated zone of the float process.
The clear glass substrate coated with the iridescence-suppressing interlayer was washed in a conventional dishwasher prior to applying the first and second transparent coatings of the present invention. The substrate was cleaned to remove any organic contamination on the surface of the interlayer.
An indium oxide coating doped with tin was deposited by stAn~Ard magnetron sputtering. The sputtering operation is conventionally known in the art.
A tin oxide coating was deposited onto the surface of the Indium oxide tin doped coating. The tin oxide coating was also deposited by stAn~rd magnetron sputtering at a thickness of 120 nm.
The resulting coated glass article exhibited a visible light transmittance (Illuminant C) of about 60%
and a total solar heat transmittance of less than 50%.
The article had a neutral color in both reflectance and transmittance. The shading co-efficient was measured at 0.65.
Example II
A coated article of lO0 mm by lO0 mm was produced in accordance with Example l. However, the indium oxide coating doped with tin was applied in the present Example using a circular magnetron with a diameter of 203 mm. The coated glass article was utilized as an outboard light in an insulated glass unit with the multilayered stack of the present invention facing the interior of the structure. A
clear glass substrate was used as the inboard light of the -WO98/10922 PCT~S97/1S914 insulated glass unit and positioned at 12 ~m from the coated article.
The unit had a total solar heat transmittance of 45.9% and visible light transmittance of 68.7%. The unit exhibited a neutral color in reflectance and transmittance. The shading co-efficient of the unit was measured at 0.534.
Predictive Example I
A float glass process is used to produce a float glass ribbon having a thickness of 0.12S inches. ~uring the production of the float glass ribbon, four coatings are consecutively applied onto the glass substrate in the float bath through conventional chemical vapor deposition methods. A first coating of tin oxide is applied onto and adheres to the surface of the glass substrate at a thickness of about 301 Angstroms. A coating of silicon dioxide of about 249 Angstroms is then deposited onto the surface of the tin oxide coating. The first coating of tin oxide and the coating of silicon dioxide form an iridescence-suppressing interlayer. A tin doped indium oxide coating of about 247S Angstroms thick is deposited onto the surface of the silicon dioxide. A final outer coating of tin oxide of about 1337 Angstroms thick is deposited onto the surface of the tin doped indium oxide coating.
The coated article is conveyed through the entire ~loat glass process. The article is then is cut and sized for placement as an outboard lite in an insulated glass unit. A clear glass is utilized as the inboard lite. The insulated glass unit has a l/8 inch gap or airspace between the outboard and inboard lites filled with argon.
CA 0223~41 1998-04-22 WO 98tlO922 PCT/US97/15914 The Drude parameters for the indium oxide coating doped with tin would include an electron concentration of about 1.0 x 1027 per cubic meter and an effective mass of about 0.35. The high frequency dielectric constant for the coating would be about 3.0 with the scattering frequency of about 0.30 x lo15 per second.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The insulated glass unit would have an aesthetically neutral transmitted co~or with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 70% and a total solar energy transmittance of about 44%. The shading co-efficient of the insulated glass unit would be about 0.57.
Predictive Example II
A float glass process is used to produce a float glass ribbon having a thickness of 0.125 inches. During the production of the float glass ribbon, four coatings are consecutively applied onto the glass substrate as disclosed in Predictive Example I. The first coating of tin oxide is applied at a thick~ec~ of about 318 Angstroms. The coating of silicon dioxide is deposited at a thickness of about 272 Angstroms. The first coating of tin oxide and the coating of silicon dioxide form an iridescence-suppressing interlayer. The tin doped indium oxide coating is deposited at a thickness of about 3495 Angstroms. The final outer coating of tin oxide is applied at a thickness of about 916 Angstroms.
CA 0223~41 1998-04-22 The coated article is conveyed through the entire float glass process after which it is cut and sized for placement as an outboard lite in an insulated glass unit.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The insulated glass unit would have an aesthetically neutral transmitted color with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 63% and a total solar energy transmittance of about 39%. The sh~ing co-efficient of the insulated glass unit would be about 0.52.
Predictive Example III
A float glass process is used to produce a float glass ribbon having a thickness of 0.125 inches. During the production of the float glass ribbon, five coatings are consecutively applied onto the glass substrate in the float bath through conventional chemical vapor deposition methods. A first coating of tin oxide is applied onto and adheres to the surface of the glass substrate at a thickness of about 118 Angstroms. A coating of silicon dioxide of about 119 Angstroms is then deposited onto the surface of the tin oxide coating. The first two layers form an iridescense-suppressing interlayer. A second tin oxide coating is deposited onto and adheres to the silicon oxide coating. The second tin oxide coating has a thickness of about 1259 Angstroms. A tin doped indium oxide coating of about 2496 Angstroms thick is deposited onto the surface of the second tin oxide coating. A final CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 outer coating of tin oxide, of about 1146 Angstroms thick, is deposited onto the surface of the tin doped indium oxide coating.
The coated article is conveyed through the entire float glass process. The article is then is cut and sized for placement as an outboard lite in an insulated glass unit. Clear glass is utilized as the inboard lite. The insulated glass unit has a l/8 inch gap or airspace between the outboard and inboard lites filled with argon.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The lS insulated glass unit would have an aesthetically neutral transmitted color with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 68% and a total solar energy transmittance of about 43%. The shading co-efficient of the insulated glass unit would ~e about 0.56.
Predictive Example IV
A float glass process is used to produce a floatglass ribbon having a thickness of 0.125 inches. During the production of the float glass ribbon, five coatings are consecutively applied onto the glass substrate as disclosed in Predictive Example III. The first coating of tin oxide is applied at a thickness of about 272 Angstroms. The coating of silicon dioxide is deposited at a thickness of about 333 Angstroms. The first two layers form an iridescence-suppressing interlayer. The second coating of tin oxide is deposited at a thickness of about CA 0223~41 1998-04-22 WO98/10922 PCT~S97tlS914 1074 Angstroms. The tin doped indium oxide coating is deposited at a thickness of about 3463 Angstroms. The final outer coating of tin oxide is applied at a thickness of about 1061 Angstroms.
The coated article is conveyed through the entire float glass process after which it is cut and sized for placement as an outboard lite in an insulated glass unit as disclosed in Predictive example III.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The insulated glass unit would have an aesthetically neutral transmitted color with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 64% and a total solar energy transmittance of about 39~. The shading co-efficient of the insulated glass unit would be about 0.51.
The attributes of a coated glass substrate are dependent upon the specific coatings applied to the CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 substrate. The coating compositions and thicknesses impart energy attenuation and light transmittance properties within the coated article while also affecting the spectral properties. Desired attributes may be obtainable by adjusting the compositions or thicknesses of the coating layer or layers. However, adjustments to enhance a specific property can adversely impact other transmittance or spectral properties of the coated glass article. Obtaining desired spectral properties is often difficult when trying to combine specific energy attenuation and light transmittance properties in a coated glass article.
It is desirable to produce a coated glass article, especially for use in architectural glazings, that is capable of attenuating both near infrared and far infrared energy while permitting a high degree of visible light transmittance. Furthermore, it is preferred that the glazing possess a neutral color in both transmittance and reflectance to gain acceptance for use in homes and buildings. The attenuation of the near infrared and the far infrared energy may occur through either reflection or absorption. However, the reflection of the radiation is preferred in order to reject the radiation from the system. The reflection of near infrared energy results in a reduced solar transmittance while the reflection of the far infrared energy provides for a low emittance. The low emittance minimizes the indirect solar heat gain from absorption.
U.S. Patent No. 4,504,l09 to Taga et. al. discloses an infrared shielding lamination comprising alternate infrared shield layers and interferential reflection layers on a transparent substrate. The infrared shield CA 0223~s41 1998-04-22 W O 98/10922 PCT~US97/15914 layers reflect energy in the near infrared spectrum. A
coated substrate having the lamination in accordance with the patent reflects infrared and near infrared without impairing the visible light transmittance.
U.S. Patent No. 4,507,547 issued to Taga et. al.
discloses a heat wave shielding lamination utilizing two types of infrared shield layers, each having different optical characteristics, laminated alternatively onto a glass substrate. The infrared shield layers have different refractive indices in the infrared spectrum but similar refractive indices in the visible light region to permit the passing of visible light while rejecting infrared energy.
In general, coated glass articles, such as described }5 in U.S. Patents 4,504,109 and 4,507,547, often exhibit iridescence or interference colors in reflected and transmitted light. It is desirable to provide architectural glazings free from iridescence, and preferably exhibiting a clear neutral color in both transmittance and reflectance. The iridescence from coatings on glass is an objectionable feature which is unacceptable for architectural applications.
Thus, the prior art suggests coatings on glass that are capable of reflecting near infrared energy while permitting the transmittance of visible light. However, conventional coatings or coating stacks do not suggest a coating means that permits both a desirable degree of selectivity between transmitted light and infrared energy and with freedom from iridescence (and thus capable of exhibiting a neutral color in both transmittance and reflectance on a clear glass substrate).
-CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 It would be advantageous to provide a coated glass article having a high degree of selectivity between visible light and near infrared energy. The high degree of selectivity would permit the transmittance of visible light while attenuating a significant amount of infrared energy. The attenuation of near infrared energy results in a reduced solar energy transmittance and therefore a low shading coefficient. The lower shading coefficient coupled with the transmittance of a high degree of visible light are desirable properties for architectural glazings.
It would also be advantageous to provide the solar reducing glazing that has an aesthetically pleasing neutral color in both transmittance and reflectance without exhibiting iridescence.
It would be a further advantage to provide a solar reducing glazing that minimizes the indirect heat gain from absorption. A low solar energy transmittance, and a high total solar reflection would significantly improve energy costs in buildings and homes.
SUMMA~Y OF T~ T~V~TTON
In accordance with the present invention, there is provided a novel glass article useful for producing coated, heat reducing glass for architectural windows.
The coated article includes a glass substrate, an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate, at least a first transparent coating deposited on and adhering to the surface of the iridescence-suppressing coating, and at least a second transparent coating deposited on and adhering to the surface of the first transparent coating.
The use of the present inventive article in architectural CA 0223~41 1998-04-22 WO98110922 PCT~S97/15914 glazings results in a glazing that rejects solar energy while permitting the transmittance of a high degree of visible light.
The specific coating stack on a clear glass substrate provides an iridescence free coated article having a high visible light transmittance and a reduced total solar energy transmittance. For example, a coated glass article made in accordance with the present invention may exhibit a visible light transmittance (Illuminant C) of at least ten percentage points higher than a solar heat transmittance with air mass l.5 on a clear 3 mm glass substrate.
In accordance with the present invention, the iridescence-suppressing interlayer of the coating stack on the glass substrate provides a means to reflect and refract light to interfere with the observance of iridescence. The layer specifically eliminates iridescence so that the coated article may, if desired, be neutral colored in both reflectance and transmittance.
Furthermore, the interlayer suppresses the observance of off angle colors. Single layer, multiple layer, or gradient layer color suppression coatings are suitable for use with the present invention.
The first transparent coating and the second transparent coating of the present invention have a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible light region. The difference in refractive indices in the near infrared region provides an interface that serves to reflect near infrared radiation. The similar refractive indices in the visible region permits the transmittance of a high degree of visible light.
CA 0223~41 1998-04-22 WO98/10922 PCT~S97/1ss14 The first transparent coating is generally a doped metal oxide, a doped mixed metal oxide, or metal nitride.
The second transparent coating is generally a metal oxide or mixed oxide with silica. The selection of the first and second transparent coatings is made in accordance with prescribed refractive indices to produce the desired transmittance properties. The noted coatings may also possess a low emissivity to minimize heat gain in an architectural glazing.
It is an object of the present invention to provide a coated, heat reducing glass article suitable for use as an architectural glazing. The coated glass article of the present invention transmits a high degree of visible light and reflects a significant amount of near infrared energy.
The present invention utilizes at least a first transparent coating and a second transparent coating that have a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible light region. The difference in refractive indices in the near infrared region provides an interface that serves to reflect near infrared radiation.
The similar refractive indices in the visible region permits the transmittance of a high degree of visible light. The attenuation of near infrared energy results in a coated article having a reduced solar energy transmittance.
It is a further object of the present invention to provide an architectural glazing having a low emittance to minimize the indirect gain from absorption. The first transparent coating of the present invention is generally a low emissivity coating that lowers the overall emittance of the coated glass article.
CA 0223~41 1998-04-22 It is also an object of the present invention to provide a coated glass article suitable for use as an architectural glazing having a neutral color in both reflectance and transmittance while maint~;ning the desired visible light transmittance. The coating stack of the present invention includes an iridescence-suppressing interlayer that is specifically applied to interfere with the observance of iridescence and thereby making possible the maintenance of a neutral color.
n~T~TT~n n~cRTpTToN OF T~ pR~F~RR~n ~RODT~T
In accordance with the present invention, it has surprisingly been discovered that a coated glass article having a multilayered coating including an iridescence-suppressing layer, at least a first transparent coating,and at least a second transparent coating, provides an article which attenuates a significant amount of near infrared energy while permitting the transmittance of a high degree of visible light. The coated glass article is especially suitable for use in architectural glazings and windows. However, the coated glass article of the present invention may also be suitable for other applications, such as vehicle windows.
The glass substrates suitable for use in preparing the coated glass article according to the present invention may include any of the conventional clear or tinted glass compositions known in the art as useful for the preparation of architectural glazings. The preferred substrate is a clear float glass ribbon wherein the coatings of the present invention are applied in the heated zone of a float glass process. Other tinted substrates may be utilized as a substrate for the CA 0223S~41 1998-04-22 application of the coatings of the present invention.
Tinted substrates may be selected to impart specific spectral properties in the coated article.
The iridescence-suppressing interlayer of the present invention provides a means to reflect and refract light to interfere with the observance of iridescence.
Iridescence-suppressing coatings are conventionally known within the art. For example, U.S. Patent Nos. 4,187,336, 4,419,386, and 4,206,252 herein incorporated by reference, describe coating techniques suitable for suppressing interference colors. The interlayer of the present invention may comprise a single iridescence-suppressing coating, a two component coating, or a gradient coating.
The color of light transmitted and reflected from coated glass substrates is measured according to the CIELAB color scale coordinates of a* and b*. A positive a* number indicates a red color hue and a negative value indicates a green color hue. A positive b* indicates yellow while a negative value indicates blue. A color saturation value, c*, is related to the observance of iridescence colors and is defined as the square root of a*2 + b*2. A coated glass article having a saturation value or c* of less than 12 units will not exhibit iridescence.
With a single component interlayer, the suppression of iridescent colors may be accomplished by selecting an interlayer having a refractive index intermediate between the refractive indices of the glass substrate and the coating deposited onto the interlayer. The intermediate refractive index results in the reflections from the interfaces having the same wavelength. An interlayer thickness selection of 1/4 wavelength of a 500 nm design CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 wavelength serves to cancel out the reflected waves and therefore suppress iridescence. Compounds suitable for use include metal oxides or metal nitrides. The most preferred composition is a silicon oxycarbide.
In a two component interlayer, the coating deposited onto and adhering to the glass substrate has a high refractive index in the visible spectrum. A second coating, having a low refractive index, is deposited on and adheres to the first coating of the interlayer. Each interlayer has a thickness selected such that the interlayer forms a combined total optical thickness of about l/6th to about l/12th of a 500 nm design wavelength.
The coatings suitable for use as high refractive index coatings include various metal oxides and nitrides, and their mixtures which have the proper refractive index.
The preferred coating for use with the present invention is tin oxide. The low index coating of the interlayer may include silicon dioxide, silicone polymer, magnesium oxide, and cryolite, with silicon dioxide being the preferred coating.
In accordance with the present invention, a gradient coating may be utilized as an iridescence-suppressing layer. A gradient coating generally comprises a layer which gradually transitions from one metal oxide or nitride film to another. Thus, the varying compositions result in a varying refractive indices which suppress iridescent colors. For example, a single gradient coating may include silica which gradually transitions into a tin oxide, cadmium stannate, silicon nitride, titanium oxide, or indium oxide.
CA 0223~S41 1998-04-22 W O 98/10922 PCTrUS97/15914 The iridescence-suppressing interlayers are suitably applied onto the glass substrate through conventional thin film coating applications. For example, the layers may be applied onto a float glass substrate in the heated zone of a float glass process by known chemical vapor deposition tec~niques or other known pyrolytic techniques.
The first transparent coating and the second transparent coating in the multilayer stack of the present invention are designed to reflect a significant amount of near infrared energy above 700 nm to about 2000 nm while transmitting a high degree of visible light between 400 nm to 700 nm, with respect to integrated values. Either coating may also absorb near infrared radiation thus further reducing the solar energy transmittance of the coated article.
The reflection of the near infrared energy is accomplished through the use of high and low refractive indices with a design wavelength in the near infrared region. The difference between the high and low index layers increases the width of the reflection zone in the near infrared region to reject near infrared radiation.
The transmittance of visible light is accomplished by selecting first and second transparent coatings with similar refractive indices in the visible spectrum. The refractive indices in the visible region of the selected transparent coatings should be within about 0.2 units of each other. The similar refractive indices permit the transmittance and reflectance of light in a neutral color.
Furthermore, the similarity in refractive indices in the visible spectrum enable the use of the noted interlayer for color suppression, since the first and second layers act as a single layer in the visible spectrum.
CA 0223~41 1998-04-22 WO g8/10922 PCTtUS97/15914 The first transparent coating of the present invention is deposited onto and adheres to the surface of the iridescence-suppressing interlayer. The first transparent coating may include a con~llctive coating which S also provides a low emissivity value. The conductivity may be imparted to the coating through known doping agents. The doped oxides have a very low refractive index in the near infrared region due to the free electrons in the material and therefore permit the selection of a second transparent coating with a high refractive index to build a near infrared reflecting area at the interface between the first and second transparent coatings.
In accordance with the present invention, the first transparent coating may be selected from the group consisting of indium oxide doped with tin, indium oxide doped with fluorine, tin oxide doped with fluorine, tin oxide doped with antimony, zinc oxide doped with aluminum, zinc oxide doped with fluorine, zinc oxide doped with boron, cadmium stannate, zinc stannate, tungsten oxide, tungsten oxide doped with fluorine, titanium nitride, and vanadium nitride. The preferred compound is indium oxide doped with tin.
The conductivity of the oxides is dependent upon the electron carrier density of the coating and the electron mobility. The free carriers also provide for the attenuation of near infrared energy through absorption.
Therefore, near infrared energy not reflected by the difference in refractive indices between the first and second transparent coatings may be absorbed by the free carriers in the first transparent coating. Additionally, the free carriers reflect some of the far infrared radiation. The result is a combination of both-the CA 0223~41 1998-04-22 WO98/1~22 PCT~S97/15914 reflection and absorption for the attenuation of solar energy. The preferred carrier density of the conductive films is greater than 5xl02~ per cubic centimeter.
Thus, the first transparent coating may additionally include low emissivity properties that minimizes heat gain through absorption. The low emittance of the coating minimizes the indirect gain from absorption for summer use and also produces a coated article having a low U value for winter use. The low emittance coating limits the inward transmission of radiant heat from the glass following the absorption of radiation.
The first transparent coating is deposited onto the coated substrate through the use of conventional deposition ~echniques. For example, the coating may be applied onto a glass ribbon substrate in the heated zone of a float glass production process. Other conventional methods of depositing the first transparent coating are suitable for use with the present invention.
In accordance with the present coated article, a second transparent coating is deposited on and adheres to the surface of the first transparent coating. The transparent coating has a refractive index in the near infrared region different than the refractive index for the first transparent coating. Examples of coating compositions suitable for use with the present invention include tin oxide, titanium oxide, aluminum oxide, indium oxide, zinc oxide, or a metal oxide mixed with silica.
The preferred coating composition is tin oxide.
The ~con~ transparent coating of the present invention may be prepared by conventional processes known in the art. For example, a suitable coating may be deposited onto the first transparent coating through the CA 0223~41 1998-04-22 decomposition of an organometallic or other metallic compound, or mixtures thereof, in an oxidizing atmosphere.
Other methods of applying metal oxide coatings, or metal oxide coatings mixed with silica, onto a substrate are suitable for practicing the present invention.
An intermediate coating, similar to the second transparent coating, may be applied onto the iridescence-suppressing interlayer prior to applying the first transparent coating. The deposition of the intermediate coating results in a coating stack having a layer with a low refractive index in the near infrared region placed between layers with high refractive indices in the near infrared region. The high/low/high design attenuates near infrared energy by establishing a broader reflection zone to reflect near infrared energy. The layers all have similar refractive indices in the visible region to permit the transmittance of a high degree of visible light. An alternative low/high stack design, with the high refractive index film as the outer coating, may be repeated at least once on the first high/low/high stack to further improve the attenuation of near infrared energy.
Coating compositions used for the second transparent coating are suitable for use with the intermediate coating.
The coated glass article of the present invention may include a glass substrate of any thickness which may be practiced in accordance with the float glass process.
However, the preferred glass substrate is 0.125 inch clear glass. The thicknesses of the first and second transparent layers is dependent upon the desired solar performance of the stack. For example, the thickness of the first transparent layer may range from 2500 to 4500 CA 0223~41 1998-04-22 WO98/10922 PCT~S97115914 angstroms while the second transparent layer may range from 800-1500 angstroms thick. For the alternative embodiment, the intermediate coating may range from 800-1500 angstroms thick.
The multilayered coatings of the present invention on a clear glass substrate may result in a coated glass article exhibiting neutral color in both reflectance and transmittance. The color is defined by the composition and thickness of the stack. The reflective color, measured from the glass substrate side of the coated article and defined on the CT~TAR color scale system, preferably has an a* value of about 0 and a b* value of about 0. The transmitted color of the coated article, measured from the coated side of the coated article and defined on the CIELAB color scale system, preferably has an a* value of about -2 and a b* value of about -4. The transmitted and reflected color of the article are preferably aesthetically neutral, with the color saturation of the article, c*, as defined by the square root of a2+b 2, less than 12 units.
The resulting coated article of the present invention, when applied to a nominal 3 mm clear glass substrate, exhibits a visible light transmittance (Illuminant C) of at least lO percentage points higher than a total solar heat transmittance integrated with air mass 1.5, as defined in ASTM E891-87. With the preferred coating article of a nominal 3mm clear glass substrate, tin oxide, silicon dioxide, indium oxide doped with tin, and tin oxide, the visible light transmittance (Illuminant C) is at least 60~ and the total solar heat transmittance less than 50%. The low solar heat transmittance of the CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 coated glass article results in a shading coefficient no greater than 0.65.
The coated glass article is ideally suited for use in architectural glazings. For example, the coated glass article may be utilized in an insulated glass unit wherein the article of the present invention functions as an outboard lite with a second clear glass article used as an i nho~ rd lite.
The insulated glass unit minimizes the heat transfer from the absorbing lite or clear glass substrate into the interior of the structure. The indirect gain, or the transmission of the absorbed radiation, is minimized if a low emissivity coating is utilized for the first transparent coating. The low emittance glass reflects or redirects the radiant heat generated from a warm object back toward the source. Additionally, the coated glass substrate is the exterior glass panel which enables outside convection from wind to minimize heat flow to the interior. The combination of the low emittance and near infrared attenuation properties of the present invention result in an insulated glass unit which rejects solar heat in the summer and exhibits a low U value, or retains heats, in the winter.
According to the preferred embodiment of the invention, an insulated glass unit, utilizing the coated glass article of the present invention, exhibits specific transmittance and spectral properties. The solar heat transmittance of the insulated glass unit is less than 50%. The insulated glass unit also exhibits a visible light transmittance (Illuminant C) greater than 60~ and preferably greater than 65%. The shading co-efficient of the unit is no greater than 0.65. The insulated glass CA 0223~41 1998-04-22 WOg8/10922 pcT~s97ll5sl4 unit has an effective emittance value of less than 0.2.
The low emittance value corresponds to a U value of less than 0.5.
The insulated glass unit preferably exhibits a neutral color in both reflectance and transmittance. The color saturation value of the unit, as defined on the CIELAB color scale system, is about 12 with a preferred value of about 8.
The following examples, which constitute the best mode presently contemplated by the inventor for practicing the present invention, are presented solely for the purpose of further illustrating and disclosing the present invention, and are not to be construed as a limitation on, the invention:
Example I
A clear glass substrate was provided for depositing the coatings of the present invention. The glass substrate was 0.125 inch thick section of float glass ribbon previously produced in a float glass production process. An iridescence-suppressing interlayer was deposited onto the surface of the glass substrate in the heated zone of a float glass production process. The iri~Pscence-suppressing layer included a tin oxide coating of 250 angstroms deposited on and adhered to the glass substrate. The tin oxide was applied by chemical vapor deposition in the heated zone of the float glass process by introducing dimethyl tin dichloride in an oxidizing atmosphere over the surface of the substrate.
A silicon dioxide coating of about 250 angstroms thick was applied onto the surface of the tin oxide coating by reacting dichlorosilane, in the pr~C~n~e of CA 0223~41 1998-04-22 WO98/1~22 PCT~S97tl5914 oxygen, near the surface of the substrate in the heated zone of the float process.
The clear glass substrate coated with the iridescence-suppressing interlayer was washed in a conventional dishwasher prior to applying the first and second transparent coatings of the present invention. The substrate was cleaned to remove any organic contamination on the surface of the interlayer.
An indium oxide coating doped with tin was deposited by stAn~Ard magnetron sputtering. The sputtering operation is conventionally known in the art.
A tin oxide coating was deposited onto the surface of the Indium oxide tin doped coating. The tin oxide coating was also deposited by stAn~rd magnetron sputtering at a thickness of 120 nm.
The resulting coated glass article exhibited a visible light transmittance (Illuminant C) of about 60%
and a total solar heat transmittance of less than 50%.
The article had a neutral color in both reflectance and transmittance. The shading co-efficient was measured at 0.65.
Example II
A coated article of lO0 mm by lO0 mm was produced in accordance with Example l. However, the indium oxide coating doped with tin was applied in the present Example using a circular magnetron with a diameter of 203 mm. The coated glass article was utilized as an outboard light in an insulated glass unit with the multilayered stack of the present invention facing the interior of the structure. A
clear glass substrate was used as the inboard light of the -WO98/10922 PCT~S97/1S914 insulated glass unit and positioned at 12 ~m from the coated article.
The unit had a total solar heat transmittance of 45.9% and visible light transmittance of 68.7%. The unit exhibited a neutral color in reflectance and transmittance. The shading co-efficient of the unit was measured at 0.534.
Predictive Example I
A float glass process is used to produce a float glass ribbon having a thickness of 0.12S inches. ~uring the production of the float glass ribbon, four coatings are consecutively applied onto the glass substrate in the float bath through conventional chemical vapor deposition methods. A first coating of tin oxide is applied onto and adheres to the surface of the glass substrate at a thickness of about 301 Angstroms. A coating of silicon dioxide of about 249 Angstroms is then deposited onto the surface of the tin oxide coating. The first coating of tin oxide and the coating of silicon dioxide form an iridescence-suppressing interlayer. A tin doped indium oxide coating of about 247S Angstroms thick is deposited onto the surface of the silicon dioxide. A final outer coating of tin oxide of about 1337 Angstroms thick is deposited onto the surface of the tin doped indium oxide coating.
The coated article is conveyed through the entire ~loat glass process. The article is then is cut and sized for placement as an outboard lite in an insulated glass unit. A clear glass is utilized as the inboard lite. The insulated glass unit has a l/8 inch gap or airspace between the outboard and inboard lites filled with argon.
CA 0223~41 1998-04-22 WO 98tlO922 PCT/US97/15914 The Drude parameters for the indium oxide coating doped with tin would include an electron concentration of about 1.0 x 1027 per cubic meter and an effective mass of about 0.35. The high frequency dielectric constant for the coating would be about 3.0 with the scattering frequency of about 0.30 x lo15 per second.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The insulated glass unit would have an aesthetically neutral transmitted co~or with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 70% and a total solar energy transmittance of about 44%. The shading co-efficient of the insulated glass unit would be about 0.57.
Predictive Example II
A float glass process is used to produce a float glass ribbon having a thickness of 0.125 inches. During the production of the float glass ribbon, four coatings are consecutively applied onto the glass substrate as disclosed in Predictive Example I. The first coating of tin oxide is applied at a thick~ec~ of about 318 Angstroms. The coating of silicon dioxide is deposited at a thickness of about 272 Angstroms. The first coating of tin oxide and the coating of silicon dioxide form an iridescence-suppressing interlayer. The tin doped indium oxide coating is deposited at a thickness of about 3495 Angstroms. The final outer coating of tin oxide is applied at a thickness of about 916 Angstroms.
CA 0223~41 1998-04-22 The coated article is conveyed through the entire float glass process after which it is cut and sized for placement as an outboard lite in an insulated glass unit.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The insulated glass unit would have an aesthetically neutral transmitted color with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 63% and a total solar energy transmittance of about 39%. The sh~ing co-efficient of the insulated glass unit would be about 0.52.
Predictive Example III
A float glass process is used to produce a float glass ribbon having a thickness of 0.125 inches. During the production of the float glass ribbon, five coatings are consecutively applied onto the glass substrate in the float bath through conventional chemical vapor deposition methods. A first coating of tin oxide is applied onto and adheres to the surface of the glass substrate at a thickness of about 118 Angstroms. A coating of silicon dioxide of about 119 Angstroms is then deposited onto the surface of the tin oxide coating. The first two layers form an iridescense-suppressing interlayer. A second tin oxide coating is deposited onto and adheres to the silicon oxide coating. The second tin oxide coating has a thickness of about 1259 Angstroms. A tin doped indium oxide coating of about 2496 Angstroms thick is deposited onto the surface of the second tin oxide coating. A final CA 0223~41 1998-04-22 WO98/10922 PCT~S97/15914 outer coating of tin oxide, of about 1146 Angstroms thick, is deposited onto the surface of the tin doped indium oxide coating.
The coated article is conveyed through the entire float glass process. The article is then is cut and sized for placement as an outboard lite in an insulated glass unit. Clear glass is utilized as the inboard lite. The insulated glass unit has a l/8 inch gap or airspace between the outboard and inboard lites filled with argon.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The lS insulated glass unit would have an aesthetically neutral transmitted color with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 68% and a total solar energy transmittance of about 43%. The shading co-efficient of the insulated glass unit would ~e about 0.56.
Predictive Example IV
A float glass process is used to produce a floatglass ribbon having a thickness of 0.125 inches. During the production of the float glass ribbon, five coatings are consecutively applied onto the glass substrate as disclosed in Predictive Example III. The first coating of tin oxide is applied at a thickness of about 272 Angstroms. The coating of silicon dioxide is deposited at a thickness of about 333 Angstroms. The first two layers form an iridescence-suppressing interlayer. The second coating of tin oxide is deposited at a thickness of about CA 0223~41 1998-04-22 WO98/10922 PCT~S97tlS914 1074 Angstroms. The tin doped indium oxide coating is deposited at a thickness of about 3463 Angstroms. The final outer coating of tin oxide is applied at a thickness of about 1061 Angstroms.
The coated article is conveyed through the entire float glass process after which it is cut and sized for placement as an outboard lite in an insulated glass unit as disclosed in Predictive example III.
The insulated glass unit, utilizing the coated glass article as an outboard lite with the multilayered stack of the present invention facing the interior of the structure, would exhibit the beneficial color and transmittance properties of the present invention. The insulated glass unit would have an aesthetically neutral transmitted color with no observance of iridescence. The insulated glass unit would have a visible light transmittance (Illuminant C) of about 64% and a total solar energy transmittance of about 39~. The shading co-efficient of the insulated glass unit would be about 0.51.
Claims (27)
1. A coated glass article comprising:
(a) a glass substrate, having a surface;
(b) an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate;
(c) a first transparent coating deposited on and adhering to the iridescence-suppressing interlayer; and (d) a second transparent coating deposited on and adhering to said first transparent coating, said first transparent coating and said second transparent coating having a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible region, wherein the coatings, including the interlayer, are such as to provide, when applied to a clear nominal 3 mm glass substrate, a glass article having a visible light transmittance (Illuminant C) of at least 10 percentage points higher than a solar heat transmittance integrated with an air mass 1.5.
(a) a glass substrate, having a surface;
(b) an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate;
(c) a first transparent coating deposited on and adhering to the iridescence-suppressing interlayer; and (d) a second transparent coating deposited on and adhering to said first transparent coating, said first transparent coating and said second transparent coating having a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible region, wherein the coatings, including the interlayer, are such as to provide, when applied to a clear nominal 3 mm glass substrate, a glass article having a visible light transmittance (Illuminant C) of at least 10 percentage points higher than a solar heat transmittance integrated with an air mass 1.5.
2. The coated glass article of claim 1, wherein the coatings including the interlayer are such as to provide a neutral color in transmittance and reflectance when applied to a clear glass substrate.
3. The coated glass article of claim 2, wherein said article exhibits a color saturation of less than 12 units, as defined by CIELAB color scale coordinates.
4. The coated glass article of claim 1, wherein said coated glass article has a visible light transmittance (Illuminant C) of at least 60%, and has a solar heat transmittance of less than 50% on a clear glass substrate at a nominal 3 mm thickness.
5. The coated glass article of claim 1, wherein said glass substrate is a clear float glass ribbon.
6. The coated glass article of claim 1, wherein said first transparent coating is selected from the group consisting of indium oxide doped with tin, indium oxide doped with fluorine, tin oxide doped with fluorine, tin oxide doped with antimony, zinc oxide doped with aluminum, zinc oxide doped with fluorine, zinc oxide doped with boron, cadmium stannate, zinc stannate, tungsten oxide, tungsten oxide doped with fluorine, titanium nitride, and vanadium nitride.
7. The coated glass article of claim 1, wherein said first transparent coating has a carrier density greater than about 5x10 20 per cubic centimeter.
8. The coated glass article of claim 1, wherein said second transparent coating is selected from the group consisting of tin oxide, titanium oxide, aluminum oxide, indium oxide, zinc oxide, and a metal oxide mixed with silica.
9. The coated glass article of claim 1, wherein said interlayer has a refractive index defined as about the square root of the multiple of the refractive indices of said glass, said first transparent coating, and said second transparent coating, said interlayer having a total optical thickness of about 1/4 wavelength of a 500 nanometer design wavelength.
10. The coated glass article of claim 1 , wherein said interlayer further comprises two component layers including, (a) a first component layer of relatively high index refractive index material deposited on and adhering to the glass substrate;
(b) a second component layer of a relatively low refractive index material deposited on and adhering to the first component layer, wherein each component layer has a thickness such that the combined interlayer forms an iridescence suppressing means with a total optical thickness of about 1/6th to about l/12th of a 500 nanometer design wavelength.
(b) a second component layer of a relatively low refractive index material deposited on and adhering to the first component layer, wherein each component layer has a thickness such that the combined interlayer forms an iridescence suppressing means with a total optical thickness of about 1/6th to about l/12th of a 500 nanometer design wavelength.
11. The coated glass article of claim 1, further comprising an intermediate coating deposited on and adhering to said iridescence-suppressing interlayer, said intermediate coating having a refractive index in the near infrared similar to the second transparent coating.
12. A coated glass article comprising:
(a) a glass substrate, having a surface;
(b) an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate;
(c) an indium oxide coating doped with tin deposited on and adhering to said iridescence-suppressing interlayer; and (d) a tin oxide coating deposited on and adhering to said indium oxide coating doped with tin, said indium oxide coating doped with tin and said tin oxide coating having a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible region, wherein the coatings, including the interlayer, are such as to provide, when applied to a clear nominal 3-mm glass substrate, a glass article having a visible light transmittance (Illuminant C) of at least 10 percentage points higher than a solar heat transmittance integrated with an air mass 1.5.
(a) a glass substrate, having a surface;
(b) an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate;
(c) an indium oxide coating doped with tin deposited on and adhering to said iridescence-suppressing interlayer; and (d) a tin oxide coating deposited on and adhering to said indium oxide coating doped with tin, said indium oxide coating doped with tin and said tin oxide coating having a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible region, wherein the coatings, including the interlayer, are such as to provide, when applied to a clear nominal 3-mm glass substrate, a glass article having a visible light transmittance (Illuminant C) of at least 10 percentage points higher than a solar heat transmittance integrated with an air mass 1.5.
13. The coated glass article of claim 12, wherein said coated glass article has an emittance less than or equal to about 0.2.
14. The coated glass article of claim 12, wherein said iridescence-suppressing interlayer includes a tin oxide coating deposited on and adhering to the surface of the glass substrate, and a silicon oxide coating deposited on and adhering to the tin oxide coating.
15. The coated glass article of claim 12, wherein said interlayer has a refractive index defined as about the square root of the multiple of the refractive indices of said glass, said first transparent coating, and said second transparent coating and has a total optical thickness of about 1/4 wavelength of a 500 nanometer design wavelength.
16. The coated glass article of claim 12 , wherein said interlayer further comprises two component layers including, (1) a first component layer of relatively high index refractive index material deposited on and adhering to the glass substrate;
(2) a second component layer of a relatively low refractive index material deposited on and adhering to the first component layer, wherein each component layer has a thickness such that the combined interlayer forms an iridescence suppressing means with a total optical thickness of about 1/6th to about 1/12th of a 500 nanometer design wavelength.
(2) a second component layer of a relatively low refractive index material deposited on and adhering to the first component layer, wherein each component layer has a thickness such that the combined interlayer forms an iridescence suppressing means with a total optical thickness of about 1/6th to about 1/12th of a 500 nanometer design wavelength.
17. The coated glass article of claim 12, wherein the coatings including the interlayer are such as to provide a neutral color in transmittance and reflectance on a clear glass substrate at a nominal 3 mm thickness.
18. The coated glass article of claim 17, wherein said article exhibits a color saturation of less than 12, as defined by CIELAB color scale coordinates.
19. The coated glass article of claim 12, wherein said coated glass article has a visible light transmittance (Illuminant C) of at least 60%, and has a solar heat transmittance of less than 50% on a clear glass substrate at a nominal 3 mm thickness.
20. The coated glass article of claim 12, wherein said indium oxide coating doped with tin has a carrier density greater than 5 x 1020 per cubic centimeter.
21. A coated glass article comprising:
(a) a glass substrate, having a surface;
(b) an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate;
(c) an intermediate coating deposited on and adhering to the iridescence-suppressing interlayer;
(d) at least one first transparent coating deposited on and adhering to the intermediate layer interlayer; and (e) at least one second transparent coating deposited on and adhering to said first transparent coating, said intermediate coating and said second transparent coating having similar refracting indices in the visible and near ir region, said first transparent coating and said second transparent coating having a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible region, wherein the coatings, including the interlayer, are such as to provide, when applied to a clear nominal 3 mm glass substrate, a glass article having a visible light transmittance (Illuminant C) of at least 10 percentage points higher than a solar heat transmittance integrated with an air mass 1.5.
(a) a glass substrate, having a surface;
(b) an iridescence-suppressing interlayer deposited on and adhering to the surface of the glass substrate;
(c) an intermediate coating deposited on and adhering to the iridescence-suppressing interlayer;
(d) at least one first transparent coating deposited on and adhering to the intermediate layer interlayer; and (e) at least one second transparent coating deposited on and adhering to said first transparent coating, said intermediate coating and said second transparent coating having similar refracting indices in the visible and near ir region, said first transparent coating and said second transparent coating having a difference in refractive indices in the near infrared region greater than a difference in refractive indices in the visible region, wherein the coatings, including the interlayer, are such as to provide, when applied to a clear nominal 3 mm glass substrate, a glass article having a visible light transmittance (Illuminant C) of at least 10 percentage points higher than a solar heat transmittance integrated with an air mass 1.5.
22. The coated glass article of claim 21, wherein said first transparent coating is selected from the group consisting of indium oxide doped with tin, indium oxide doped with fluorine, tin oxide doped with fluorine, tin oxide doped with antimony, zinc oxide doped with aluminum, zinc oxide doped with fluorine, zinc oxide doped with boron, cadmium stannate, zinc stannate, tungsten oxide, tungsten oxide doped with fluorine, titanium nitride, and vanadium nitride.
23. The coated glass article of claim 4, wherein said intermediate coating and said second transparent coating are selected from the group consisting of tin oxide, titanium oxide, aluminum oxide, indium oxide, zinc oxide, and a metal oxide mixed with silica.
24. An insulated glass unit for architectural windows, comprising a coated glass article as defined in claim 1.
25. The insulated glass unit of claim 24, wherein said insulated glass unit has a neutral color in transmittance and reflectance.
26. The insulated glass unit of claim 24, wherein said insulated glass unit has a shading co-efficient no greater than 0.65.
27. The insulated glass unit of claim 24, wherein said insulated glass unit has a U value of less than 0.5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US713,785 | 1996-09-13 | ||
| US08/713,785 US5780149A (en) | 1996-09-13 | 1996-09-13 | Glass article having a solar control coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2235541A1 true CA2235541A1 (en) | 1998-03-19 |
Family
ID=24867527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002235541A Abandoned CA2235541A1 (en) | 1996-09-13 | 1997-09-10 | Glass article having a solar control coating |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5780149A (en) |
| EP (1) | EP0885118A4 (en) |
| JP (1) | JP2000501693A (en) |
| KR (1) | KR19990067507A (en) |
| AU (1) | AU4260797A (en) |
| CA (1) | CA2235541A1 (en) |
| ID (1) | ID19324A (en) |
| TR (1) | TR199800844T1 (en) |
| WO (1) | WO1998010922A1 (en) |
| ZA (1) | ZA978141B (en) |
Families Citing this family (62)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231971B1 (en) * | 1995-06-09 | 2001-05-15 | Glaverbel | Glazing panel having solar screening properties |
| TW385375B (en) * | 1996-07-26 | 2000-03-21 | Asahi Glass Co Ltd | Transparent conductive film and forming method for transparent electrode |
| TW382006B (en) * | 1996-09-13 | 2000-02-11 | Pilkington Plc | Improvements in or related to coated glass |
| US6018902A (en) * | 1997-06-27 | 2000-02-01 | Ebsco Industries, Inc. | Iridescent coating for fishing lure |
| US5935716A (en) * | 1997-07-07 | 1999-08-10 | Libbey-Owens-Ford Co. | Anti-reflective films |
| ATE292607T1 (en) | 1997-10-20 | 2005-04-15 | Ppg Ind Ohio Inc | INFRARED AND ULTRAVIOLET RADIATION ABSORBING BLUE GLASS COMPOSITION |
| US6649214B2 (en) * | 1997-12-18 | 2003-11-18 | Ppg Industries Ohio, Inc. | Compositions and methods for forming coatings of selected color on a substrate and articles produced thereby |
| US7776460B2 (en) * | 1998-03-20 | 2010-08-17 | Agc Glass Europe | Coated substrate with high reflectance |
| US6881505B2 (en) | 1998-03-20 | 2005-04-19 | Glaverbel | Coated substrate with high reflectance |
| GB9806027D0 (en) | 1998-03-20 | 1998-05-20 | Glaverbel | Coated substrate with high reflectance |
| CH693138A5 (en) * | 1998-06-19 | 2003-03-14 | Unaxis Trading Ag | Laminated glass and method for making a coated plastic film therefor. |
| US6165598A (en) * | 1998-08-14 | 2000-12-26 | Libbey-Owens-Ford Co. | Color suppressed anti-reflective glass |
| US6596398B1 (en) | 1998-08-21 | 2003-07-22 | Atofina Chemicals, Inc. | Solar control coated glass |
| US6218018B1 (en) * | 1998-08-21 | 2001-04-17 | Atofina Chemicals, Inc. | Solar control coated glass |
| AU5820199A (en) | 1998-09-17 | 2000-04-03 | Libbey-Owens-Ford Co. | Heat strengthened coated glass article and method for making same |
| AU2004200384B2 (en) * | 1999-03-18 | 2006-04-27 | Ppg Industries Ohio, Inc. | Methods of making low haze coatings and the coatings and coated articles made thereby |
| US6797388B1 (en) * | 1999-03-18 | 2004-09-28 | Ppg Industries Ohio, Inc. | Methods of making low haze coatings and the coatings and coated articles made thereby |
| JP2001002449A (en) * | 1999-04-22 | 2001-01-09 | Nippon Sheet Glass Co Ltd | Low-emissivity glass and glass article using the same |
| US6858306B1 (en) * | 1999-08-10 | 2005-02-22 | Pilkington North America Inc. | Glass article having a solar control coating |
| WO2001078545A1 (en) * | 2000-04-13 | 2001-10-25 | Thomas Andrew Moeller | Fasteners incorporating a whistle |
| US6743488B2 (en) | 2001-05-09 | 2004-06-01 | Cpfilms Inc. | Transparent conductive stratiform coating of indium tin oxide |
| US20030049464A1 (en) * | 2001-09-04 | 2003-03-13 | Afg Industries, Inc. | Double silver low-emissivity and solar control coatings |
| WO2003053577A1 (en) * | 2001-12-21 | 2003-07-03 | Nippon Sheet Glass Co., Ltd. | Member having photocatalytic function and method for manufacture thereof |
| US7067195B2 (en) * | 2002-04-29 | 2006-06-27 | Cardinal Cg Company | Coatings having low emissivity and low solar reflectance |
| US6733889B2 (en) | 2002-05-14 | 2004-05-11 | Pilkington North America, Inc. | Reflective, solar control coated glass article |
| US7122252B2 (en) * | 2002-05-16 | 2006-10-17 | Cardinal Cg Company | High shading performance coatings |
| EP1527028B1 (en) * | 2002-07-31 | 2018-09-12 | Cardinal CG Company | Temperable high shading performance coatings |
| EP1641723B1 (en) * | 2003-06-24 | 2008-01-02 | Cardinal CG Company | Concentration-modulated coatings |
| JP4210748B2 (en) * | 2003-08-27 | 2009-01-21 | 独立行政法人物質・材料研究機構 | Zinc oxide-based laminated structure |
| US20050164012A1 (en) * | 2004-01-24 | 2005-07-28 | Carson Stephen W. | Near infrared reflecting coatings on glass |
| US20050196623A1 (en) * | 2004-03-03 | 2005-09-08 | Mckown Clem S.Jr. | Solar control coated glass composition |
| JP2008505842A (en) | 2004-07-12 | 2008-02-28 | 日本板硝子株式会社 | Low maintenance coating |
| US7923114B2 (en) | 2004-12-03 | 2011-04-12 | Cardinal Cg Company | Hydrophilic coatings, methods for depositing hydrophilic coatings, and improved deposition technology for thin films |
| US8092660B2 (en) | 2004-12-03 | 2012-01-10 | Cardinal Cg Company | Methods and equipment for depositing hydrophilic coatings, and deposition technologies for thin films |
| EP1852402A1 (en) * | 2004-12-06 | 2007-11-07 | Nippon Sheet Glass Company Limited | Glass member having photocatalytic function and heat ray reflective function, and double layer glass employing it |
| US20060123689A1 (en) * | 2004-12-15 | 2006-06-15 | Michael Lange | Fishing lure fabricated with dichroic material |
| US20060141265A1 (en) * | 2004-12-28 | 2006-06-29 | Russo David A | Solar control coated glass composition with reduced haze |
| WO2006091668A1 (en) * | 2005-02-24 | 2006-08-31 | Pilkington North America, Inc. | Anti-reflective, thermally insulated glazing articles |
| US7743630B2 (en) * | 2005-05-05 | 2010-06-29 | Guardian Industries Corp. | Method of making float glass with transparent conductive oxide (TCO) film integrally formed on tin bath side of glass and corresponding product |
| WO2007121215A1 (en) | 2006-04-11 | 2007-10-25 | Cardinal Cg Company | Photocatalytic coatings having improved low-maintenance properties |
| US7989094B2 (en) | 2006-04-19 | 2011-08-02 | Cardinal Cg Company | Opposed functional coatings having comparable single surface reflectances |
| BRPI0712316A2 (en) * | 2006-06-05 | 2012-01-24 | Pilkington Group Ltd | coated glass article, insulated glass unit, and method for forming a coated glass article |
| US20080011599A1 (en) | 2006-07-12 | 2008-01-17 | Brabender Dennis M | Sputtering apparatus including novel target mounting and/or control |
| US20080311392A1 (en) * | 2007-06-12 | 2008-12-18 | Ming Scientific, Llc | Thermal barrier |
| US8186113B2 (en) * | 2007-07-09 | 2012-05-29 | Raytheon Canada Limited | Building window having a visible-light-reflective optical interference coating thereon |
| US7820296B2 (en) | 2007-09-14 | 2010-10-26 | Cardinal Cg Company | Low-maintenance coating technology |
| CL2008003281A1 (en) * | 2007-11-02 | 2009-10-16 | Agc Flat Glass Na Inc | Method for manufacturing a thin film comprising supplying a substrate, depositing a first layer on it, depositing a second layer comprising sn and / or zn oxide on a portion of the first layer, in the presence of an oxidizing agent at high temperature increasing the electrical conductivity of the second layer. |
| JP5559486B2 (en) * | 2009-03-23 | 2014-07-23 | 株式会社ブリヂストン | Heat ray shielding glass and multilayer glass using the same |
| JP5257255B2 (en) * | 2009-06-11 | 2013-08-07 | 旭硝子株式会社 | Heat ray reflective transparent material, method for producing heat ray reflective transparent material, and greenhouse equipped with heat ray reflective transparent material |
| JP5674446B2 (en) * | 2010-12-16 | 2015-02-25 | 株式会社ブリヂストン | Heat ray shielding film, heat ray shielding glass using the same, and multilayer glass |
| CN102634754A (en) * | 2011-02-15 | 2012-08-15 | 鸿富锦精密工业（深圳）有限公司 | Coated piece and preparation method thereof |
| US9957194B2 (en) | 2011-03-30 | 2018-05-01 | Pilkington Group Limited | Coated tinted glass article and method of making same |
| KR101223887B1 (en) * | 2011-11-23 | 2013-01-17 | 주식회사 넥스필 | Sputter coated with boron compounds, thermal shutdown films manufacturing process that combines a transparent way |
| US9332862B2 (en) * | 2012-11-30 | 2016-05-10 | Guardian Industries Corp. | Refrigerator door/window |
| CN103539365B (en) * | 2013-10-09 | 2016-08-17 | 河源旗滨硅业有限公司 | A kind of reflective solar controls low radiation coated glass and preparation method thereof |
| CN104178047B (en) * | 2014-08-20 | 2016-06-08 | 昆山博益鑫成高分子材料有限公司 | A kind of flexible and transparent nano heat-insulating film and its preparation method |
| WO2016075435A1 (en) * | 2014-11-12 | 2016-05-19 | Pilkington Group Limited | Coated glass article, display assembly made therewith and method of making a display assembly |
| US10641035B1 (en) * | 2016-01-25 | 2020-05-05 | Hawkes Design And Consulting, Llc | Glazing system for high wind area |
| WO2018093985A1 (en) | 2016-11-17 | 2018-05-24 | Cardinal Cg Company | Static-dissipative coating technology |
| JP7365905B2 (en) * | 2017-04-06 | 2023-10-20 | ピルキントン グループ リミテッド | coated glass articles |
| EP4014262A4 (en) * | 2019-08-16 | 2023-10-04 | Ubiquitous Energy, Inc. | Method and system for color neutral transparent photovoltaics |
| CN114930541A (en) | 2019-08-16 | 2022-08-19 | 无处不在能量公司 | Para-phenylene materials as buffer and color adjustment layers for solar cells |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1153189B (en) * | 1961-06-30 | 1963-08-22 | Zeiss Ikon Ag | Arrangement for separating the heat radiation from the beam path of a light source |
| US3149989A (en) * | 1961-12-01 | 1964-09-22 | Corning Glass Works | Radiation-reflecting medium |
| US3331941A (en) * | 1963-12-26 | 1967-07-18 | Monsanto Co | Infrared heater |
| US3630809A (en) * | 1965-01-04 | 1971-12-28 | Monsanto Co | Pellucid laminates |
| US3427089A (en) * | 1965-03-12 | 1969-02-11 | Webb James E | Ultraviolet filter |
| LU49672A1 (en) * | 1965-03-23 | 1967-04-21 | ||
| FR1443311A (en) * | 1965-05-11 | 1966-06-24 | Centre Nat Rech Scient | Interference filters for the infrared region of the electromagnetic spectrum |
| US3468594A (en) * | 1968-06-06 | 1969-09-23 | Westinghouse Electric Corp | Optical apparatus for use in infrared radiation |
| DE2648878C3 (en) * | 1976-10-28 | 1981-11-19 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Method of manufacturing a heat ray cut filter |
| US4187336A (en) * | 1977-04-04 | 1980-02-05 | Gordon Roy G | Non-iridescent glass structures |
| US4206252A (en) * | 1977-04-04 | 1980-06-03 | Gordon Roy G | Deposition method for coating glass and the like |
| US4419386A (en) * | 1981-09-14 | 1983-12-06 | Gordon Roy G | Non-iridescent glass structures |
| JPS5890604A (en) * | 1981-11-25 | 1983-05-30 | Toyota Central Res & Dev Lab Inc | Infrared-ray shielding laminate |
| DE3201783A1 (en) * | 1982-01-21 | 1983-09-08 | Leybold-Heraeus GmbH, 5000 Köln | METHOD FOR PRODUCING LARGE COLOR-NEUTRAL, A HIGH INFRARED PART OF THE RADIATION REFLECTIVELY BY LAYOUT AND VIEW FROM RADIATION BY CATODENSION OF TARGETS, AND BY THE METHOD PRODUCED |
| JPS58209549A (en) * | 1982-06-01 | 1983-12-06 | 株式会社豊田中央研究所 | Heat-wave shielding laminate |
| JPS597043A (en) * | 1982-07-06 | 1984-01-14 | 株式会社豊田中央研究所 | Heat-wave shielding laminate |
| US4977013A (en) * | 1988-06-03 | 1990-12-11 | Andus Corporation | Tranparent conductive coatings |
| US5254392A (en) * | 1991-06-24 | 1993-10-19 | Ford Motor Company | Anti-iridescence coatings |
| US5168003A (en) * | 1991-06-24 | 1992-12-01 | Ford Motor Company | Step gradient anti-iridescent coatings |
| US5248545A (en) * | 1991-06-24 | 1993-09-28 | Ford Motor Company | Anti-iridescent coatings with gradient refractive index |
| US5543229A (en) * | 1991-10-30 | 1996-08-06 | Asahi Glass Company Ltd. | Method of making a heat treated coated glass |
| FR2684095B1 (en) * | 1991-11-26 | 1994-10-21 | Saint Gobain Vitrage Int | PRODUCT WITH A GLASS SUBSTRATE PROVIDED WITH A LOW EMISSIVITY LAYER. |
-
1996
- 1996-09-13 US US08/713,785 patent/US5780149A/en not_active Expired - Fee Related
-
1997
- 1997-09-10 CA CA002235541A patent/CA2235541A1/en not_active Abandoned
- 1997-09-10 ID IDW980008A patent/ID19324A/en unknown
- 1997-09-10 AU AU42607/97A patent/AU4260797A/en not_active Abandoned
- 1997-09-10 JP JP10513770A patent/JP2000501693A/en active Pending
- 1997-09-10 TR TR1998/00844T patent/TR199800844T1/en unknown
- 1997-09-10 ZA ZA9708141A patent/ZA978141B/en unknown
- 1997-09-10 WO PCT/US1997/015914 patent/WO1998010922A1/en not_active Application Discontinuation
- 1997-09-10 KR KR1019980703529A patent/KR19990067507A/en not_active Application Discontinuation
- 1997-09-10 EP EP97940940A patent/EP0885118A4/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AU4260797A (en) | 1998-04-02 |
| WO1998010922A1 (en) | 1998-03-19 |
| ID19324A (en) | 1998-07-02 |
| US5780149A (en) | 1998-07-14 |
| KR19990067507A (en) | 1999-08-25 |
| JP2000501693A (en) | 2000-02-15 |
| TR199800844T1 (en) | 1998-12-21 |
| EP0885118A1 (en) | 1998-12-23 |
| EP0885118A4 (en) | 2000-05-03 |
| ZA978141B (en) | 1998-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5780149A (en) | Glass article having a solar control coating | |
| EP1506143B2 (en) | Reflective, solar control coated glass article | |
| EP0925260B1 (en) | Coated glass | |
| AU2006216707B2 (en) | Anti-reflective, thermally insulated glazing articles | |
| EP1861339B1 (en) | Coating composition with solar properties | |
| EP1923362B1 (en) | Infrared reflective glass plate and laminated glass for vehicle window | |
| EP0648196B1 (en) | Glazing with functional conductive and/or low emissive layer | |
| EP1228015B1 (en) | Glass article having a solar control coating | |
| EP1169275B1 (en) | Methods of making low haze coatings and the coatings and coated articles made thereby | |
| US5897957A (en) | Coated glass article having a solar control coating | |
| JPH08337441A (en) | Transparent substrate having antireflection coating | |
| KR20080055947A (en) | Multiple cavity low-emissivity coating | |
| CA2348597A1 (en) | Solar control coatings and coated articles | |
| PL204317B1 (en) | Transparent substrate comprising an antiglare coating | |
| EP1499568A1 (en) | Coatings having low emissivity and low solar reflectance | |
| EP2038231B1 (en) | Glass article having a zinc oxide coating and method for making same | |
| CN1207068A (en) | Glass article having a solar control coating | |
| WO1997025201A1 (en) | Coated glass article having a solar control coating | |
| JPH0952738A (en) | Heat ray interrupting glass | |
| WO2021165680A1 (en) | Coated glass articles | |
| WO2023006543A1 (en) | Glazing for preventing bird collisions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |