STABLE, CONCENTRATED AND DILUTE, OIL-IN-WATER EMULSIONS, THEIR PROCESSES OF PREPARATION, AND FORMULATION PROCESS EMPLOYING THESE EMULSIONS
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United States of America Patent
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app pub date -
Dec 4, 2009
filing date -
Aug 12, 2003
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Abstract
A stable oil-in-water emulsion, a process for the preparing such emulsion, and a formulation process employing the emulsion. The stable oil-in-water emulsion is obtained from an air-in-water preemulsion to which a simple or complex fatty substance is added by moderate mixing, preferably without exerting a shear force. The air-in-water preemulsion includes a surfactant, preferably a nonionic surfactant, a co surfactant chosen from hydrophilic compounds, preferably having at least one hydroxyl group, which are chosen in particular from the family of the polyols, and an aqueous phase. The ratios of these three components of the preemulsion are chosen within the region of ordered liquid crystal structure of the phase diagram of these three components and/or in ratios chosen so that the structure of the mixture of these three components, observed under a microscope in polarized light, exhibits birefringence characteristics.
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