L'oreal

Loreal Sa

Florence Chanvin

Isabelle Afriat

Quang Lan Nguyen

Dang-Man Pham

Carole Guiramand

A water-in-oil emulsion containing ascorbic acid and, as an emulsifier, a dimethiconecopolyol or an alkyldimethiconecopolyol, where the aqueous phase having a pH ranging from 5.5 to 7.5. This emulsion allows ascorbic acid to be stabilized and can be used, in particular, in the cosmetics and/or dermatological fields. The invention also relates to a cosmetic process for treating the skin using the emulsion.

Emulsion containing ascorbic acid and its uses in the cosmetics and dermatological fields

A water-in-oil emulsion containing ascorbic acid and, as an emulsifier, a dimethiconecopolyol or an alkyldimethiconecopolyol, where the aqueous phase having a pH ranging from 6.1 to 7.5. This emulsion allows ascorbic acid to be stabilized and can be used, in particular, in the cosmetics and/or dermatological fields. The invention also relates to a cosmetic process for treating the skin using the emulsion.

A composition in the form of a water/oil/water triple emulsion comprising an outer aqueous phase and an oily phase constituting, with an inner aqueous phase, a W/O primary emulsion, the outer aqueous phase comprising, in combination, an emulsifying copolymer of carboxylic acid with a fatty chain, and a crosslinked poly(acrylamidomethylpropane-sulfonic acid). The emulsion remains stable, even in the presence of an acidic active agent, and is particularly appropriate as vehicle for water-sensitive and/or oxygen-sensitive active agents, in particular in a cosmetic or dermatological composition. The active agent can be, in particular, a vitamin, such as ascorbic acid or retinol, an enzyme and an .alpha.- or .beta.-hydroxy acid. The emulsion obtained can constitute, in particular, a composition for cleaning and/or treating and/or protecting the skin and/or mucous membranes and/or keratinous fibers.

Stable W/O/W emulsion and its use as cosmetic and/or dermatological

A synegistic system based on a phosphonic acid derivative and on a metabisulphite, for stabilizing ascorbic acid. The invention also relates to compositions, in particular cosmetic and dermatological compositions, containing ascorbic acid and this stabilizing system, and to the use of these compositions in the cosmetics and/or dermatological fields.

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Soisy/S/Seine, France

Florence Chanvin