Method of making foam
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United States of America Patent
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May 2, 2017
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app pub date -
Nov 14, 2013
filing date -
Nov 21, 2012
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Abstract
A method of making a foam from a polymerizable resin includes the following steps. A thermally-activated initiator having a temperature below the initiation temperature is combined with an elevated-temperature solution having the polymerizable resin and carbon dioxide at a temperature above a promoted temperature to create a resulting mixture having a temperature above the promoted temperature. The resulting mixture is expanded by decreasing the pressure of the mixture to create a froth having a plurality of cells formed by carbon dioxide that expanded out of solution. The polymerizable resin within the froth is cured to create a foam.
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