US4307150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weatherable solar reflector
Assignee: 3M Co
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Filing: 1979-08-13
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Granted: 1981-12-22
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Expires: 1999-08-13
Abstract
Abstract Solar reflector comprising an opaque, specular metalized polymeric foil protected from corrosion and weathering by a layer of an interpolymer of (1) lower acrylate and/or methacrylate monomers and (2) minor amounts of ethylenically unsaturated lower carboxylic acid monomers.
Inventors
- 👤 John L. Roche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:03
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/32; F; F24; F24S; F24S23/00; F24S23/70; F24S23/81; G; G02; G02B; G02B1/00; G02B1/10; G02B1/18; H; H10; H10F; H10F77/00; H10F77/40; H10F77/42; H10F77/488; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/50; Y02E10/52; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699; Y10T428/31786; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A solar reflector comprising a flexible support sheet having a smooth face, an opaque, specular metallic layer, on the order of at least 0.08 to 0.1 micrometer thick, firmly bonded to said face, and a thin, transparent weather-resistant protective polymeric layer bonded to said metallic layer so as to be exposed to the environment, said polymeric layer comprising an interpolymer of monomers consisting essentially of (a) 98.0-99.5% of acrylic ester monomers selected from the class consisting of lower acrylates and lower methacrylates and (b) 2.0-0.5% of carboxylic acid monomers selected from the class consisting of acrylic acid, methacrylic acid, itaconic acid and maleic acid.
Claim 2
Dependent Claim
104 words
A solar reflector comprising a flexible support sheet having a smooth face, an opaque, specular metallic layer, on the order of at least 0.08 to 0.1 micrometer thick, firmly bonded to said face, and a thin, transparent weather-resistant protective polymeric layer bonded to said metallic layer so as to be exposed to the environment, said polymeric layer comprising an interpolymer of monomers consisting essentially of (a) 98.0-99.5% of acrylic ester monomers selected from the class consisting of lower acrylates and lower methacrylates and (b) 2.0-0.5% of carboxylic acid monomers selected from the class consisting of acrylic acid, methacrylic acid, itaconic acid and maleic acid.
Claim 3
Dependent Claim
14 words
The reflector of claim 1 wherein the support comprises a biaxially oriented polymeric foil.
Claim 4
Dependent Claim
44 words
The reflector of claim 1 wherein the support is a biaxially oriented co-extruded composite comprising a first polyester lamina which contains slip agent and, at one face, a second polyester lamina free from slip agent, the metallic layer being bonded to said second lamina.
Claim 5
Dependent Claim
18 words
The reflector of claim 1, 2 or 3 wherein the metallic layer is at least 99.98% pure aluminum.
Claim 6
Dependent Claim
33 words
The reflector of claim 4 wherein the acrylic ester monomers are selected from the class consisting of methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate, methyl methacrylate, ethyl methacrylate and butyl methacrylate.
Claim 7
Dependent Claim
142 words
A sheet material particularly adapted for making the reflector of claim 5 comprising a polyester foil having first and second surfaces, (a) a normally tacky and pressure-sensitive adhesive bonded to said first surface; (b) an opaque specular layer of at least 99.98% pure aluminum, on the order of at least 0.08 to 0.1 micrometer thick, vapor-deposited on said second surface; (c) firmly adherently bonded to said aluminum layer and constituting an exposed surface of said sheet material, a coating of an interpolymer of monomers consisting essentially of (1) about 50 to 70% monomers selected from the class consisting of methyl methacrylate and ethyl methacrylate; (2) about 30 to 50% monomers selected from the class consisting of butyl acrylate, butyl methacrylate and 2-ethyl hexyl acrylate and (3) 0.5 to 2.0% carboxylic acid selected from the class consisting of acrylic acid and methacrylic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |