EXPANDED POLYOLEFIN CONTAINING POWDERED ACTIVATED CARBON
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United States of America Patent
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Jun 20, 2013
app pub date -
Aug 29, 2011
filing date -
Aug 30, 2010
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Abstract
A pre-expanded polyolefin particle containing powdered activated carbon (PAC) and a pre-expanded polyolefin particle containing PAC and a sterically hindered amine ether flame retardant, as well as processes for preparing pre-expanded polyolefin particles. A process for producing the pre-expanded polyolefin includes providing polyolefin polymer granules containing powdered activated carbon; impregnating the polyolefin polymer granules with a volatile blowing agent in an aqueous suspension at a pressure of 5 to 50 bar and at temperatures of 100 to 170° C.; and decompression to atmospheric pressure.
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