Conductive polymer foams, method of manufacture, and articles thereof
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United States of America Patent
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Jan 7, 2014
Grant Date -
Dec 18, 2008
app pub date -
Aug 5, 2008
filing date -
Feb 6, 2007
priority date (Note) -
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Abstract
A method of manufacturing a polymer foam composite is described, the method comprising forming an article having a first surface and an opposite second surface from a precursor composition, the precursor composition comprising a polymer foam precursor composition, and a filler composition comprising a plurality of magnetic, electrically conductive particles; foaming the precursor composition to form a plurality of cells in precursor composition; applying a magnetic field to the foamed precursor composition, wherein the magnetic field is of a strength and applied for a time effective to align the electrically conductive, magnetic particles into mutually isolated chains between the first surface and the opposite second surface of the article; and solidifying the polymer foam precursor composition to provide a polymer foam composite having a density of about 1 to about 125 pounds per cubic foot and a volume resistivity of about 10−3 ohm-cm to about 103 ohm-cm at a pressure of 60 pounds per square inch. Polymer foam composites made by this method are also described, as well as articles formed therefrom.
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