Capsum

Harvard College

Enric Santanach Carreras

Jérôme Bibette

Liang-Yin Chu

Yan Eric Pafumi

David A Weitz

Ho Cheung Shum

Nicolas Bremond

Alberto Fernandez-Nieves

Thomas Delmas

Andrew S Utada

Leslie Rolland

Audrey Royere

A method of manufacturing a series of capsules (A) comprising a core (), and a gelled envelope () completely encapsulating the core and comprising at least two external phases (A,B), wherein the gelled envelope has a external surface comprising at least two distinct portions (A,B) formed respectively by the two external phases, and comprising the following steps: Series of capsules, cosmetic composition containing the capsules and cosmetic treatment using the composition.

Series of capsules and method of manufacture, cosmetic composition and cosmetic treatment

Each capsule comprises a liquid core () and a gelled shell () comprising a gelled polyelectrolyte completely encapsulating the liquid core () at the periphery thereof. The gelled shell () is suitable for retaining the liquid core () when the capsule () is immersed in a gas. The liquid core () comprises an intermediate drop () of an intermediate phase, the intermediate phase being placed in contact with the gelled shell (), and at least one internal drop () of an internal phase placed in the intermediate drop (). The ratio of the volume of the core () to the volume of the gelled shell () is greater than 2, advantageously is greater than 50.

Series of capsules comprising at least one drop of internal phase in a drop of intermediate phase and manufacturing method thereof

A dispersion including a plurality of bodies dispersed in a continuous phase. Each dispersed body including an internal drop formed with an internal phase miscible with the continuous phase, the internal drop () receiving an active product. Each dispersed body including, around the internal drop, a membrane formed with an intermediate phase immiscible with the continuous phase and totally surrounding the internal drop. The ratio Rof the average thickness (e) of the membrane over the average transverse dimension (D) of the active volume delimited by the internal drop and the membrane is greater than 0.05, and is advantageously less than 0.5. The ratio Rof the partition coefficient of the active product between the intermediate phase forming the membrane and the internal phase forming the internal drop over the viscosity of the membrane is less than 1 s&#xb7;Pa.

Dispersion intended for encapsulating an active product and associated use

A method includes separately conveying a first liquid solution () containing the first material and a second liquid solution () containing a liquid polyelectrolyte. The method includes forming of a series of drops () at the outlet (), each drop () including a central core () formed from a first solution () and a peripheral film () formed from a second solution. The method includes immersing each drop () in a gelling solution () containing a reagent capable of reacting with the polyelectrolyte of the film () so as to form the gelled casing. The second solution () contains at least one surfactant before the former contacts the first solution ().

Method for manufacturing capsule series, and related capsule series

The present invention generally relates to emulsions such as multiple emulsions, and to methods and apparatuses for making emulsions, and techniques for using the same. A multiple emulsion generally describes larger droplets that contain one or more smaller droplets therein which, in some cases, can contain even smaller droplets therein, etc. Emulsions, including multiple emulsions can be formed in certain embodiments with generally precise repeatability, and can be tailored to include any number of inner droplets, in any desired nesting arrangement, within a single outer droplet. In addition, in some aspects of the invention, one or more droplets may be controllably released from a surrounding droplet.

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Marseilles, France

Enric Santanach Carreras