Patent ID: 6663950
Filing Date: 2003-12-16
Classification: B32B,B82Y,G02B,Y10T

Abstract:
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)Ã—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%.