Low-emissivity, soil-resistant coating for glass surfaces
First Claim
1. A coated glass article having an exterior surface bearing a low emissivity water-sheeting coating thereon, said coating comprising a first pyrolytically applied dielectric layer carried by the exterior surface and an exterior layer of substantially non-porous silica sputtered directly onto an outer surface of the first layer, the low emissivity water-sheeting coating reducing the contact angle of water on the coated exterior surface below about 25°
- and causing water applied to the coated exterior surface to sheet.
1 Assignment
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Accused Products
Abstract
A coated article (e.g., a coated glass article) is provided with a low-emissivity, water-sheeting coating. The coating comprises a sputtered silica layer over a pyrolytically-applied dielectric layer. In certain embodiments, an automobile windscreen is provided with a low-emissivity, water-sheeting coating. Also provided are methods of rendering a surface of a substrate (e.g., a pane of glass) resistant to soiling and staining, such as by depositing on the substrate a low-emissivity, water-sheeting coating.
178 Citations
25 Claims
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1. A coated glass article having an exterior surface bearing a low emissivity water-sheeting coating thereon, said coating comprising a first pyrolytically applied dielectric layer carried by the exterior surface and an exterior layer of substantially non-porous silica sputtered directly onto an outer surface of the first layer, the low emissivity water-sheeting coating reducing the contact angle of water on the coated exterior surface below about 25°
- and causing water applied to the coated exterior surface to sheet.
- View Dependent Claims (2, 3, 4, 5, 6, 16, 17, 18, 19, 20)
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7. An automobile windscreen comprising:
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a) an outer pane of glass having an exterior surface and a first bonded surface;
b) an inner pane of glass having an interior surface and a second bonded surface;
c) a tear-resistant polymeric layer disposed between the first bonded surface and the second bonded surface;
d) a low emissivity water-sheeting coating carried by the exterior surface of the outer pane, the low emissivity water-sheeting coating comprising a first pyrolytically applied dielectric layer carried by the exterior surface and an exterior layer of substantially non-porous silica sputtered directly onto an outer surface of the first layer, the low emissivity water-sheeting coating reducing the contact angle of water on the coated exterior surface below about 25° and
causing water applied to the coated exterior surface to sheet. - View Dependent Claims (8, 9, 10, 21, 22, 23, 24, 25)
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11. A method of rendering a surface of a pane of glass resistant to soiling and staining, comprising:
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a) providing a sheet of glass having a clean interior surface and a clean exterior surface, the exterior surface bearing a pyrolytically applied dielectric layer having a contact angle with water of at least about 30°
;
b) coating the interior surface of the sheet of glass with a reflective coating by sputtering, in sequence, at least one fist dielectric layer, at least one metal layer, and at least one second dielectric layer;
c) coating the exterior surface of the glass with a water-sheeting coating by sputtering substantially non-porous silica directly onto the outer surface of the pyrolytically applied dielectric layer, thereby yielding a low-emissivity water sheeting coating having a contact angle with water below about 25°
which causes water applied to the coated exterior surface of the pane to sheet. - View Dependent Claims (12, 13)
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14. A method of rendering a surface of a pane of glass resistant to soiling and staining, comprising:
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a) providing a sheet of glass having a clean interior surface and a clean exterior surface, the exterior surface bearing a pyrolytically applied dielectric layer having a contact angle with water of at least about 30°
;
b) providing a sputtering line comprising a series of sputtering chambers each having a support for a sheet of glass therein, at least one of the sputtering chambers comprising a downward sputtering chamber having an upper target positioned above the support, a second of the sputtering chambers comprising an upward sputtering chamber having a lower target positioned below the support;
c) positioning the sheet of glass on the support in the downward sputtering chamber such that the interior surface is oriented toward the upper target and sputtering the upper target to deposit a dielectric layer on one of the interior surface of the glass or a film stack layer previously deposited on the interior surface of the glass;
d) positioning the sheet of glass on the support in die upward sputtering chamber such that the pyrolytically applied dielectric layer is oriented toward the lower target and sputtering the lower target to deposit a water-sheeting coating comprising substantially non-porous silica on the exterior surface of the glass. - View Dependent Claims (15)
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Specification