Porous material and method of production thereof
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United States of America Patent
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Jan 22, 2013
Grant Date -
Jun 14, 2007
app pub date -
Jul 29, 2004
filing date -
Aug 4, 2003
priority date (Note) -
Expired
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Abstract
The present invention relates to a method for producing a porous material comprising the steps of; (a) providing a C/W emulsion comprising an aqueous phase, a matrix building material, a surfactant and liquid CO2 phase; (b) at least partially freezing the aqueous phase; (c) gasifying CO2 from the liquid CO2 phase to form an intermediate porous material; (d) venting gasified CO2 from the intermediate porous material; and (e) freeze drying the intermediate porous material at least substantially to remove the aqueous phase and form the porous material. The present invention also relates to a porous material obtainable by the method.
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