Process for producing low density gel compositions
AssigneeCabot Corporation
InventorsStephen Wallace, Douglas M. Smith, William C. Ackerman
Life of this patent
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Abstract
Disclosed are processes for producing gel composition which may be utilized to produce low density gel compositions without the need for supercritical drying, thermal treatment or surface treatment. The processes comprise drying a wet gel comprising gel solids and a drying agent to remove the drying agent while minimizing shrinkage of the gel during drying.
Claims14
A process for producing a gel composition comprising drying a wet gel comprising gel solids and a drying agent having a vapor pressure at its freezing/melting point greater than or equal to 1 Torr to remove the drying agent under drying conditions sufficient to produce a dried gel composition having a rod density of less than or equal to 0.27 g/cc and at a pressure of less than or equal to 300 psia and at a temperature within 15 degrees Celsius of the freezing/melting point of the drying agent.
Dependencies are inferred from the claim text.