Method for preparing a non-fibrous porous material
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United States of America Patent
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Dec 4, 2001
Grant Date -
N/A
app pub date -
Jun 19, 1998
filing date -
Dec 19, 1995
priority date (Note) -
Expired
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Abstract
A method for preparing a non-fibrous porous material essentially consisting of one or more hydrophilic polymers and/or pharmaceutical medicaments comprising forming an aqueous solution, sol or gel comprising one or more hydrophilic polymers and/or pharmaceutical medicaments, freezing the solution, sol or gel and extracting the frozen water selectively using a hydrophilic organic solvent being miscible with water at a temperature below 5.degree. C. at which temperature the solvent is not able to dissolve the frozen solutes, leaving the non-fibrous material in a solid, porous form.
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