Stable, concentrated and dilute, oil-in-water emulsions, their processes of preparation, and formulation process employing these emulsions

A stable oil-in-water emulsion, comprising:

• an air-in-water preemulsion consisting essentially in a mixture with air of three components which are a nonionic surfactant with an HLB of greater than or equal to 13, a hydrophilic cosurfactant, and an aqueous phase, the components being present in ratios that provide one of (i) an ordered liquid crystal structure according to a phase diagram of the three component mixture and (ii) birefringence under an optical microscope in polarized light for the three component mixture;
• and
• a simple or complex fatty substance being selected from the group consisting of fatty acid esters, waxes, butters, wax esters, natural, synthetic or mineral oils, hydrogenated oils and mixtures thereof, wherein,
• the stable oil-in-water emulsion is a gel obtained by mixing the air-in-water preemulsion with the simple or complex fatty substance, the oil-in-water emulsion exhibiting gustatory, pharmaceutical, dermatological or cosmetic property or function,
• the gustatory property or function being selected from the group consisting of a taste, a flavoring, a feeling in the mouth, an enrichment in vitamins, an enrichment in fatty acids,
• the pharmaceutical property or function being a pharmaceutical activity,
• the dermatological or cosmetic property or function being selected from the group consisting of combating aging, healing, limiting secretion of seborrhea, cleaning, protecting against UV radiation, moisturizing, emmollience, astringency, sunscreen, antiwrinkle, anti-inflammatory, anti-redness, refining and cell regeneration.