Patent Pick: α-Gel Intermediate and O/W Emulsion


Patent Picks are chosen by the editors from publicly available sources. Today's invention relates to an α-gel intermediate and its use to create stable o/w emulsions that do not require a cooling device.

α-Gel intermediate production and use
WIPO Patent Application WO/2015/190306
Publication date: Dec. 17, 2015
Assignee: Shiseido Company, Ltd.

This invention relates to the preparation and use of an α-gel intermediate composition for easily and stably preparing a stable o/w emulsion that exhibits little change in viscosity over time.

The α-gel intermediate comprises: 20-80% (by mass %) each of mixture A and B. Mixture A is obtained by mixing, in a molar ratio range of 3:2 to 5:1, at least one higher alcohol having a carbon number of at least 16, and an active anionic surface agent. Mixture B is obtained by mixing, in a mass ratio range of 5:5 to 8:2, at least one water-soluble solvent having an IOB value of 1.5-3.5, and water.

The α-gel-intermediate composition is further characterized in that at temperatures in the range of 65-85˚C, it is a liquid comprising either a bicontinuous microemulsion phase or a bicontinuous microemulsion phase having lamellar liquid crystal dispersed therein. At room temperature, it is a solid.

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