Roofing articles with reflective thin films and the process of producing the same
AssigneeCertainTeed Corporation
InventorsMing Liang Shiao, Keith C. Hong
Life of this patent
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Abstract
A roofing article is prepared by applying a thin metal or metal oxide film to a base substrate. The thin film has greater than about 80 percent transmission of incident radiation having a wavelength between 300 nm and 700 nm and greater that about 60 percent reflectance of incident radiation having a wavelength between 700 nm and 2500 nm.
Claims28
A process for preparing a roofing article, the process comprising:
- (a) providing a base substrate having an upper surface;
- (b) applying a thin film to the upper surface of the base substrate, the thin film being selected from the group consisting of metals and metal oxides having greater than about 80 percent transmission of incident radiation having a wavelength between 300 nm and 700 nm and greater than about 60 percent reflectance of incident radiation having a wavelength between 700 nm and 2500 nm, and
- (c) applying a clear coating over the thin film, the clear coating being selected from the group consisting of poly(meth)acrylates, polyurethanes, fluoropolymers, phosphates, titanates, zirconates, silicates, and silicas.
A roofing article comprising a base substrate having an upper surface, the upper surface being coated with a thin film selected from the group consisting of metals and metal oxides having greater than about 80 percent transmission of incident radiation having a wavelength between 300 nm and 700 nm and greater that about 60 percent reflectance of incident radiation having a wavelength between 700 nm and 2500 nm, the thin film being covered with a clear coating selected from the group consisting of poly(meth)acrylates, polyurethanes, fluoropolymers, phosphates, titanates, zirconates, silicates, and silicas.
A roofing article comprising a base substrate having an upper surface, the base substrate being selected from the group consisting of asphalt shingles, roofing membranes, ceramic roofing tiles, painted metal coil stock, concrete roofing tiles, cedar shakes, natural slate roofing tiles, and synthetic slate roofing tiles, the upper surface being coated with a thin film selected from the group consisting of metals and metal oxides having greater than about 80 percent transmission of incident radiation having a wavelength between 300 nm and 700 nm and greater that about 60 percent reflectance of incident radiation having a wavelength between 700 nm and 2500 nm, the thin film being selected to provide a colored roofing article having an L* of less than 85.
Dependencies are inferred from the claim text.