Optically active film composite
AssigneeCPFilms Inc.
InventorsSteven A. Barth, Anthony B. Port, Coby L. Hubbard
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Abstract
An optically active film composite including a polymeric film substrate coated with a layer of resin having a thickness of less than 6 microns and a pencil hardness of at least 2H, and which includes 30-60% by weight of nanoparticles of ATO or ITO, and nanoparticles of a second metallic compound being an inorganic compound and absorbing light having a wavelength in the range of 700-1100 nm. The composite preferably has a VLT of at least 50% and a %TSER of at least 35% with a weighted UV absorption of less than 1%.
Claims9
An optically active film composite comprising a transparent polymeric film substrate having a UV-absorbing material and a hardcoat layer with a thickness of less than 6 microns and a pencil hardness of at least 2H, said hardcoat layer comprising a resin binder including 50-60% by weight of antimony tin oxide nanoparticles for absorbing light having a wavelength in the range of 1000-2500 nm, and 0.5-2% by weight of LaB6 nanoparticles for absorbing light having a wavelength in the range of 700-1100 nm, the weight ratio of LaB6 and antimony tin oxide being such that weight of LaB6:weight of (LaB6+antimony tin oxide)×100 is in the range of 1.08-3.53%, the composite having a visible light transmission of at least 70% and % total solar energy rejection of at least 35%.
Dependencies are inferred from the claim text.