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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Issued Date -
Sep 13, 2007
app pub date -
Mar 8, 2006
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 perylene based dye to form a mixture. The perylene based die being capable of preferentially absorbing energy having wavelengths of about 700 nanometers (nm) to about 1100 nm. The method further includes cooling the mixture to form a transparent thermoplastic article with controlled solar energy transmittance properties.
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