Water-in-oil-in-water multiple emulsion compositions are disclosed. The multiple emulsion compositions comprise an external aqueous phase optionally incorporating a surfactant system capable of forming liquid crystals as an emulsifier. The internal phase comprises a primary water-in-oil emulsion, wherein the primary emulsion comprises a first topically-active compound, a surfactant phase, an oil phase, and water.
A multiple emulsion of the type W.sub.1 /O/W.sub.2 is made by first preparing a primary emulsion W.sub.1 /O using a silicone fluid as the oil phase (O), and an elastomeric silicone polyether as an emulsifier, for dispersing water phase W.sub.1 into oil phase (O). The primary emulsion W.sub.1 /O is then added and dispersed into a final continuous water phase W.sub.2 to form a multiple emulsion W.sub.1 /O/W.sub.2. The multiple emulsions are useful for treating the hair, the skin, or the underarm areas of the human body. Vitamins or drugs can be included in the oil phase (O) or in either aqueous phase W.sub.1 or W.sub.2 to enhance the benefits of the multiple emulsions in personal care applications.
Methods of formulating products having nitrogen-based components to reduce malodor thereof and formulating fragrances to add to the product include selecting at least one malodor-reducing odorant determined by calculated values of air impact, flux, dipole moment, clogP and hydrogen bond donor and acceptor indexes and adding the fragrance to the product to mask malodor.
A topical solution that looks and performs like an oil, but with the totally non-oil-like characteristic of being completely water soluble. The present invention utilizes materials that have the oil-like look and feel, i.e. polyoxyethylene ethers, but define an end product which is water soluble. Sun screen active ingredients can also be incorporated into this formulation to yield desired SPF values
A simplified process is presented for the preparation of stable, aqueous hair dyeing emulsions, comprising at least one oxidation hair dyestuff precursor, by first preparing a homogenous oily phase comprising at least one oil-soluble emulsifier by mixing the oil components at an increased temperature between 40.degree. and 80.degree. C., and subsequently mixing this oily phase with an aqueous phase, comprising at least one water-soluble emulsifier under shearing force at a temperature between 15.degree. and 30.degree. C. Compared to conventional processes of hot emulsification, this process substantially reduces the preparation time.
Active substance combinations of (a) one or more surface-active substances selected from the group comprising glucose derivatives, (b) one or more surface-active substances selected from the group comprising glycerol monocarboxylic or dicarboxylic acid monoesters and (c) one or more water-soluble, cosmetically or pharmaceutically acceptable UV filters.
