Low-emissivity coating having low solar reflectance
AssigneeCardinal CG Company
InventorWayne L. Hoffman
Life of this patent
Estimating the term…
Abstract
The invention provides low solar reflectance, low-emissivity coatings. The invention also provides a pane bearing a low solar reflectance, low-emissivity coating. Further, the invention provides an insulating glass unit comprising first and second panes held in a spaced-apart configuration, wherein the panes have confronting inner surfaces oriented toward a between-pane space and opposed outer surfaces oriented away from the between-pane space, and wherein one of these inner surfaces bears a low solar reflectance, low-emissivity coating. Also provided are methods of producing coated substrates.
Claims42
A pane bearing a low-emissivity coating comprising, in sequence outwardly from the pane, an inner coat, a high absorption primary layer, a middle coat, and an infrared-reflective layer, the inner coat being deposited directly onto the pane, wherein said infrared-reflective layer comprises material that is highly reflective of infrared radiation, the high absorption primary layer comprises material that is highly absorptive of solar radiation and includes at least about 100 angstroms of film, the inner coat comprises at least one transparent dielectric film and has an optical thickness, the middle coat comprises at least one transparent dielectric film and has an optical thickness of between about 600 angstroms and about 1,800 angstroms, wherein a major portion of the thickness of the high absorption primary layer is metallic titanium, and wherein the coating has a ratio defined as the optical thickness of the inner coat divided by the optical thickness of the middle coat, said ratio being between about 0.15 and about 0.32.
A pane bearing a low-emissivity coating comprising the following sequence of films:
- a) an inner coat comprising at least one transparent dielectric film, the inner coat being deposited directly on the pane;
- b) a high absorption primary layer comprising material that is highly absorptive of solar radiation, the high absorption primary layer including at least about 100 angstroms of film, wherein a major portion of the thickness of the high absorption primary layer is metallic titanium;
- c) a middle coat comprising at least one transparent dielectric film and having an optical thickness of between about 600 angstroms and about 1,800 angstroms;
- d) an infrared-reflective layer comprising material that is highly reflective of infrared radiation;
- e) a high absorption blocker layer comprising material that is highly absorptive of solar radiation, the high absorption blocker layer being deposited directly over the infrared-reflective layer;
- and
- f) an outer coat comprising at least one transparent dielectric film.
A pane bearing a low-emissivity coating comprising the following sequence of films:
- a) an inner coat, applied directly onto the pane, comprising at least one transparent dielectric film;
- b) a high absorption primary layer comprising material that is highly absorptive of solar radiation, the high absorption primary layer including at least 100 angstroms of film;
- c) a middle coat comprising a titanium dioxide film sandwiched between two zinc oxide films;
- d) an infrared-reflective layer comprising material that is highly reflective of infrared radiation;
- e) a high absorption blocker layer comprising material that is highly absorptive of solar radiation, the high absorption blocker layer including at least about 75 angstroms of film;
- and
- f) an outer coat comprising at least one transparent dielectric film.
A glass pane bearing a low-emissivity coating comprising the following sequence of films:
- a) an inner coat, applied directly onto the pane, comprising at least one transparent dielectric film;
- b) a high absorption primary layer comprising material that is highly absorptive of solar radiation, the high absorption primary layer including at least about 100 angstroms of film, wherein a major portion of the thickness of the high absorption primary layer is metallic titanium;
- c) a middle coat comprising at least one transparent dielectric film, wherein the middle coat has an optical thickness of between about 600 angstroms and about 1,800 angstroms;
- d) an infrared-reflective layer comprising silver;
- e) a high absorption blocker layer comprising material that is highly absorptive of solar radiation, the high absorption blocker layer being deposited directly over the infrared-reflective layer;
- and
- f) an outer coat comprising at least one transparent dielectric film, wherein the outer coat forms the outermost film region of the coating, wherein the pane is part of an insulating glass unit and the low-emissivity coating is carried on a #2 surface of the insulating glass unit;
- said insulating glass unit having an exterior solar reflectance of less than about 20% and having a transmitted color characterized by an ah color coordinate and a bh color coordinate, both of said color coordinates being negative.
Dependencies are inferred from the claim text.