摘要:
Emulsions of a liquid oil phase in a liquid water phase which comprise a) more than 50 weight percent of a hydrofluoroether, a perfluoroether or a combination thereof, based on the total weight of the emulsion, b) a surfactant, and c) water, are useful in a cosmetic formulation or a cosmetic concentrate. The hydrofluoroether is represented by formula (I) CnHmF0- O - CxHyFz wherein n is a number of 1 to 12, m is a number of 0 to 25, o is a number of 0 to 25, m+o=2n+l, x is a number of 1 to 12, y is a number of 0 to 25, z is a number of 0 to 25, and y+z=2x+l, provided that m and y are not simultaneously zero, and o and z are not simultaneously zero.
摘要:
The present invention includes a process of preparing an advanced cosmetic product by combining a high internal phase ratio (HIPR) emollient-in-water emulsion with a partial cosmetic formulation that typically contains water, a coloring agent, a fragrance, a rheology modifier, or a pH adjuster, or a combination thereof. The present invention also includes compositions directed to two particular subclasses of HIPR emollient-in-water emulsions, namely an HIPR silicone elastomer-in-water emulsion and an HIPR sunscreen-in-water emulsion and water-diluted dispersions thereof. The use of an HIPR emulsion of a cosmetic emollient provides a simple and flexible method of formulating the cosmetic product, due in part to the long shelf-stability of the HIPR emulsion (greater than 1 year), and the low quantity of water in the emulsion (typically less than 20 percent by volume based on the volume of emollient and water). The HIPR sunscreen-in-water emulsion can be formulated into an advanced cosmetic product with an improved sun protection factor (SPF) and critical wavelength.