Transparent plastic articles having controlled solar energy transmittance properties and methods of making
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United States of America Patent
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app pub date -
Apr 27, 2007
filing date -
Mar 8, 2006
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Abstract
A method of making a transparent plastic article having controlled solar energy transmittance properties includes, in one embodiment, providing a fluid thermoplastic material, and adding from about 0.003 percent by weight to about 0.1 percent by weight of a blend of a perylene based dye and a nanoparticle hexabromide based IR absorber to form a mixture. The blend of perylene based die and nanoparticle hexabromide based IR absorber being capable of preferentially absorbing energy having wavelengths of about 700 nanometers (nm) to about 1100 nm, and the ratio of an amount of perylene based dye to the amount of nanoparticle hexaboride IR absorber comprising about 99:1 to about 1:99. The method further includes cooling the mixture to form a transparent thermoplastic article with controlled solar energy transmittance properties.
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