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AssigneeExxon Research & Engineering Co.
InventorsTina C. Vogler, William J. Asher
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The instant invention relates to liquid membrane capsule system (LMCS) which are made resistant to coalescence by means of an irreversible coating material present in the suspension phase. LMCS having this irreversible coating material are stable (i.e. resist coalescence) over relatively long periods of time with little or no applied agitation. These irreversibly coated LMCS can be pumped for long periods, are resistant to bile, pancreatin and solid matter and maintain their initial size distribution. The instant invention relates to methods of preparing the irreversibly coated LMCS. The LMCS of the instant invention exhibit resistance to rupture during pumping and passage over packing materials, such as glass beads or charcoal, thus making them of use in medical treatment processes such as renal dialysis and in the equipment used for such processes.
An improved liquid membrane capsule resistant to coalescence, said capsule comprising a globule of an emulsion suspended in an aqueous suspending phase wherein said emulsion comprises discrete microdroplets of an aqueous interior phase surrounded by a continuous, nonaqueous, oil, exterior phase, wherein the improvement comprises an irreversible coating component comprising a long chain polymer possessing surface activity and the ability to gel or chain crosslink present in the aqueous suspending phase which forms an irreversible coating arround the oily, exterior phase of said capsule making same resistant to coalescence.
A method for the preparation of liquid membrane capsules (LMC) which are resistant to coalescence, which comprises:
Dependencies are inferred from the claim text.