ELECTRICALLY CONDUCTIVE AND DISSIPATIVE POLYURETHANE FOAMS
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United States of America Patent
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Sep 18, 2014
app pub date -
Jul 8, 2013
filing date -
Mar 15, 2013
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Abstract
This invention relates to coated polyurethane foams and to a process for preparing coated polyurethane foams. More specifically, these coated polyurethane foams comprise (a) a polyurethane foam substrate, and (b) at least one bilayer of a coating composition on the foam substrate which comprises (1) a layer of a positively or negatively charged carbon allotrope, and (2) a layer of a positively or negatively charged polymer. When the carbon allotrope is positively charged, the other material is negatively charged, and vice versa. The final product (i.e. coated polyurethane foam) contains at least 1% by weight of the coating composition, based on 100% by weight of the coated polyurethane foam. The foams described herein have a surface resistivity of less than or equal to 1012 ohms per square.
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