Solar control coated glass
First Claim
1. A coated, solar control glass having preselected reflected color and having a NIR solar absorbing layer and a low emissivity layer, comprising glass having a SnO2 coating containing at least two layers with one layer being a solar absorbing layer comprising SnO2 containing a dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof and another layer being a low emissivity layer comprising SnO2 containing a dopant selected from the group fluorine, phosphorus, and mixtures thereof wherein the thickness of the solar absorbing layer is from 80 to 300 nanometers (nm) and the thickness of the low emissivity layer is from 200 to 450 nm, the reflectance of visible light from the coated side of the glass is 6.2% or greater and said preselected reflected color is achieved without the need for a separate iridescence reflected color suppressing layer.
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Accused Products
Abstract
A solar-control glass that has acceptable visible light transmission, absorbs near infrared wavelength light (NIR) and reflects midrange infrared light (low emissivity mid IR) along with a preselected color within the visible light spectrum for reflected light is provided. Also provided is a method of producing the improved, coated, solar-controlled glass. The improved glass has a solar energy (NIR) absorbing layer comprising tin oxide having a dopant such as antimony and a low emissivity control layer (low emissivity) capable of reflecting midrange infrared light and comprising tin oxide having fluorine and/or phosphorus dopant. A separate iridescence color suppressing layer as described in the prior art is generally not needed to achieve a neutral (colorless) appearance for the coated glass, however an iridescence suppressing layer or other layers may be combined with the two layer assemblage provided by the present invention. If desired, multiple solar control and/or multiple low emissivity layers can be utilized. The NIR layer and the low emissivity layer can be separate portions of a single tin oxide film since both layers are composed of doped tin oxide. A method of producing the coated solar control glass is also provided.
123 Citations
49 Claims
- 1. A coated, solar control glass having preselected reflected color and having a NIR solar absorbing layer and a low emissivity layer, comprising glass having a SnO2 coating containing at least two layers with one layer being a solar absorbing layer comprising SnO2 containing a dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof and another layer being a low emissivity layer comprising SnO2 containing a dopant selected from the group fluorine, phosphorus, and mixtures thereof wherein the thickness of the solar absorbing layer is from 80 to 300 nanometers (nm) and the thickness of the low emissivity layer is from 200 to 450 nm, the reflectance of visible light from the coated side of the glass is 6.2% or greater and said preselected reflected color is achieved without the need for a separate iridescence reflected color suppressing layer.
- 4. A coated, solar control glass having a preselected reflected color and having a solar absorbing layer and a low emissivity layer, comprising a SnO2 film in direct contact with said glass and containing at least two dopants and a difference in the concentration of the dopants from one surface of the film to the opposite surface of the film, said first dopant being selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof, and said second dopant being fluorine, phosphorus, and mixtures thereof aid first dopant comprising at least 50% of the dopants present at a first surface of said SnO2 film to form a solar absorbing layer within said SnO2 film adjacent to said first surface, and said second dopant being present at a concentration at least 50% of the dopant at a second surface of said film opposite said first surface to form a low emissivity layer within said SnO2 film adjacent to said second surface and the reflectance of visible light from the coated side of the glass is 6.2% or greater.
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39. A NIR film comprising tin oxide containing a NIR dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, and nickel and containing a fluorine dopant at an atomic concentration less then the concentration of the NIR dopant.
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41. A NIR film comprising tin oxide containing a NIR dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, and nickel and containing a color modifying dopant present in a quantity sufficient to modify the transmitted color of light through the film and selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and fluorine, provided that the selection of color modifying dopant is different then the selection of NIR dopant and when fluorine is the selected dopant its atomic concentration is less then the concentration of the NIR dopant.
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42. A coated, solar control glass having Neutral-blue Color for reflected light and having a NIR solar absorbing layer and a low emissivity layer, comprising glass having a coating containing at least two layers with one layer being a solar absorbing layer comprising SnO2 containing a dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof and another layer being a low emissivity layer comprising SnO2 containing a dopant selected from the group fluorine or phosphorus and said Neutral-blue Color for reflected light is achieved without the need for an anti-iridescence reflected color controlling layer.
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43. A coated, solar control glass having a color intensity index of 12 or less for reflected light and having a NIR solar absorbing layer and a low emissivity layer, comprising glass having a coating containing at least two layers with one layer being a solar absorbing layer comprising SnO2 containing a dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof and another layer being a low emissivity layer comprising SnO2 containing a dopant selected from the group fluorine or phosphorus and said color intensity index of 12 or less for reflected light is achieved without the need for an anti-iridescence reflected color controlling layer.
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44. A coated, solar control glass having C.I.E. 1931 color coordinates x between about 0.285 and 0.310 and y between about 0.295 and 0.325 for reflected light and having a NIR solar absorbing layer and a low emissivity layer, comprising glass having two layers coated thereon with one layer being a solar absorbing layer comprising SnO2 containing a dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof and a second layer being a low emissivity layer comprising SnO2 containing a dopant selected from the group fluorine or phosphorus and said C.I.E. 1931 color coordinates x between about 0.285 and 0.310 and y between about 0.295 and 0.325 for reflected light is achieved without the presence of an anti-iridescence reflected color controlling layer in direct contact with said glass.
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45. A coated, solar control glass having a C.I.E. 1931 color coordinates x between about 0.285 and 0.325 and y between about 0.295 and 0.33 for reflected light and having a NIR solar absorbing layer and a low emissivity layer, comprising glass having at least two layers coated thereon, with one layer being a solar absorbing layer comprising SnO2 containing a dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof a second layer being a low emissivity layer comprising SnO2 containing a dopant selected from the group fluorine or phosphorus and said preselected reflected color is achieved without the presence of an anti-iridescence reflected color controlling layer in direct contact with said glass.
Specification