Heat shielding additives
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United States of America Patent
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May 1, 2012
Grant Date -
Feb 3, 2011
app pub date -
Oct 23, 2008
filing date -
Nov 5, 2007
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Abstract
Polymer dispersions of powders based on tungsten hydrogen bronze, especially containing a minor amount of tungsten metal, show good IR absorbing and heat shielding properties. The powders may be obtained by contacting an ammonium tungstate with hydrogen at a temperature of 2500 K or more, e.g. in a plasma.
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