Compositions and methods for preparing dispersions of thickened oils
OwnerJames M. Wilmott, Michael Ross +2inventors
InventorsJames M. Wilmott, Michael Ross, Duncan T. Aust, Timothy K. Crawford
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Abstract
Disclosed are methods for preparing surfactant free dispersions of hydrophobic fluids and hydrophobic rheological modifying agents which are used to modify the aesthetic properties of cosmetic and pharmaceutical topical compositions. The dispersions are prepared using high pressure/high shear methods. In particular, the dispersions comprise polyisobutene gel or silicone gel.
Claims25
A method for preparing a surfactant-free oil-in-water dispersion comprising a hydrophobic fluid, a hydrophobic rheological modifying agent and an aqueous phase, comprising the steps of mixing the hydrophobic fluid and the hydrophobic rheological modifying agent to form a hydrophobic phase, adding the aqueous phase to the hydrophobic phase, and processing the hydrophobic/aqueous mixture under high pressure/high shear mixing conditions to form a stable oil-in-water dispersion having a particle size of from about 50 to 1000 nm.
Dependencies are inferred from the claim text.