Heat reflecting fenestration products with color corrective and

Details Heat reflecting fenestration products with color corrective and Heat reflecting fenestration products with color corrective and

1997-12-04

1999-12-28

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428336, 428428, 428432, 428698, 428701, 428702, 359580, 359585, 359586, G02B 524

Patent

active

060079010

ABSTRACT:
A heat reflecting fenestration composite is provided which includes in sequence: (a) a substantially transparent substrate; (b) a first outer dielectric layer; (c) an infrared reflecting metal layer; (d) a color correcting metal layer comprising a metal different from the infrared reflecting metal layer; (e) a protective metal layer comprising a metal different from the infrared reflecting metal layer and different from the color correcting layer; and (f) a second outer dielectric layer. The dielectric layers are typically indium oxide, indium zinc oxide, indium tin oxide or mixtures thereof. Preferably, the composite also includes additional layers of infrared reflecting metal layer, color correcting metal, protective metal and dielectric. Also preferably, the composite comprises a top layer of glass or transparent polymeric plastic. The infrared reflecting metal layer is typically silver, gold, copper or alloys thereof. The color correcting metal layer typically has a refractive index in the visible light range between about 0.6 and about 4 and has an extinction coefficient for light in the visible light range between about 1.5 and about 7. Metals such as chromium, cobalt, nickel, zinc, palladium, indium, tin, antimony, platinum, bismuth and alloys thereof can be used in the color correcting metal layer, with indium being preferred. The protective metal layer is made from a metal whose oxide is substantially non-optically absorbing, such as aluminum, titanium, zirconium, niobium, hafnium, tantalum, tungsten and alloys thereof, with titanium being preferred. The color correcting and protective metal layers can also be disposed on both sides of the infrared reflecting metal layer. Such composites provide a heat reflecting fenestration structure having exception degradation resistant properties and visible light transmission reduction properties, without excessive reflectance.

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