EP0137161A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Non-iridescent infrared-reflecting article for solar energy control
Assignee: PPG Industries Ohio Inc
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Filing: 1984-07-25
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Granted: —
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Expires: 2004-07-25
Abstract
Abstract A noniridescent, high transmittance, low emissivity, infrared reflecting coated article for solar energy control and a method for its production are disclosed. The article comprises a transparent substrate, especially a glass sheet, an infrared reflecting film which exhibits interference color effects, and a uniformly reflecting, transparent film which is sufficiently reflective in the visible range to mask the interference color effects of the infrared reflecting film. Two of such coated glass sheets are assembled in a substantially parallel relation with the infrared reflecting facing each other to form a multiple glazed unit.
Inventors
- 👤 Joseph Edward Michelotti
- 👤 Vern Allan Henery
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 17:48
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10165; B32B17/10174; E; E06; E06B; E06B3/00; E06B3/66; E06B3/67; E06B3/6715
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
75 words
An article for solar energy control having at least two major substantially parallel surfaces comprising at least one transparent sheet, characterized in that, a. on one major surface of said article a transparent, infrared reflecting coating is disposed at a thickness which exhibits interference effects, and b. on another major surface of said article a transparent, uniformly reflecting coating is disposed of sufficient reflectance to mask the visible interference effects of the infrared reflecting coating.
Claim 2
Dependent Claim
75 words
An article for solar energy control having at least two major substantially parallel surfaces comprising at least one transparent sheet, characterized in that, a. on one major surface of said article a transparent, infrared reflecting coating is disposed at a thickness which exhibits interference effects, and b. on another major surface of said article a transparent, uniformly reflecting coating is disposed of sufficient reflectance to mask the visible interference effects of the infrared reflecting coating.
Claim 3
Dependent Claim
76 words
A high transmittance, low emissivity multiple glazed window unit for solar energy control comprising two glass sheets in parallel spaced relation, characterized in that, a. a transparent infrared reflecting film which exhibits visible interference color effects on one surface of one of said glass sheets, and b. a transparent, uniformly reflecting film on a parallel surface of one of said sheets having sufficient visible reflectance to mask the interference color effects of the infrared reflecting film.
Claim 4
Dependent Claim
76 words
A high transmittance, low emissivity multiple glazed window unit for solar energy control comprising two glass sheets in parallel spaced relation, characterized in that, a. a transparent infrared reflecting film which exhibits visible interference color effects on one surface of one of said glass sheets, and b. a transparent, uniformly reflecting film on a parallel surface of one of said sheets having sufficient visible reflectance to mask the interference color effects of the infrared reflecting film.
Claim 5
Dependent Claim
12 words
An article according to Claim 1, wherein said transparent sheet is glass.
Claim 6
Dependent Claim
17 words
An article according to Claims 1 or 3, wherein said article comprises at least two glass sheets.
Claim 7
Dependent Claim
16 words
An article according to Claims 1 - 4, wherein the infrared reflecting film is tin oxide.
Claim 8
Dependent Claim
31 words
An article according to Claims 1 - 5, wherein the masking coating is selected from the group consisting of tin oxide, titanium oxide, nickel oxide, chromium oxide, silicon and silicon oxide.
Claim 9
Dependent Claim
14 words
An article according to Claim 6, wherein the masking coating is colorless tin oxide.
Claim 10
Dependent Claim
23 words
An article according to Claims 1 - 7, wherein the infrared reflecting coating has resistivity not greater than about 50 ohms per square.
Claim 11
Dependent Claim
27 words
An article according to Claims 1 - 8, wherein the thickness of the tin oxide infrared reflecting film corresponds with a minimum in the luminous reflectance curve.
Claim 12
Dependent Claim
28 words
An article according to Claims 1 - 9, wherein the thickness of the tin oxide infrared reflecting film corresponds with the first minimum in the luminous reflectance curve.
Claim 13
Dependent Claim
26 words
An article according to Claims 1 - 10, wherein the luminous reflectance of the tin oxide infrared reflecting film is not more than about 10 percent.
Claim 14
Dependent Claim
54 words
An article according to Claims 1 - 11, wherein the thickness of the infrared reflecting tin oxide film is selected to correspond with the first minimum in the luminous reflectance curve and the thickness of the colorless tin oxide masking film is selected to correspond to the first maximum in the luminous reflectance curve.
Claim 15
Independent Claim
93 words
A method for producing a noniridescent coated article according to Claims 1 - 12 for solar energy control comprising the steps of: a. coating a transparent substrate with an infrared reflecting film of a material which exhibits interference color effects at the desired effective thickness; and b. masking the visible interference color effects of the infrared reflective film by coating a surface substantially parallel with the infrared reflective film with a transparent, uniformly reflecting film having sufficient reflectance in the visible range to mask the interference color effects of the infrared reflecting film.
Claim 16
Dependent Claim
40 words
A method according to Claim 13, wherein the substrate is a glass sheet and two of such coated glass sheets are assembled in substantially parallel relation with the infrared reflecting films facing each other to form a multiple glazed unit.
Claim 17
Independent Claim
31 words
A method according to Claims 13 - 14, wherein the two coated glass substrates are assembled with the coated surfaces facing each other across i the interior space in the unit.
Claim 18
Independent Claim
33 words
A method according to Claims 13 - 15, wherein the infrared reflecting tin oxide film and the colorless masking tin oxide film are formed by pyrolysis of tin compounds on hot glass surfaces.
Claim 19
Dependent Claim
16 words
A method according to Claim 16, wherein said films are deposited by pyrolysis of alkyltin fluorides.
References Cited (Backward Citations)
No citation records indexed.
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