Emulsion containing stabilized ascorbic acid, cosmetic treatment process using it and uses thereof
AssigneeL'oreal
InventorsDidier Candau, Nathalie Collin
Life of this patent
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Abstract
An emulsion containing stabilized ascorbic acid, alone or as a mixture with another acid, such that the aqueous phase has an acidic pH, which is at most equal to 3.5, with the emulsion further containing an emulsifying agent formed of dimethiconecopolyol or alkyldimethiconecopolyol is provided along with its use in the cosmetics, dermatological and/or veterinary fields.
Claims26
An emulsion comprising an aqueous phase dispersed in an oily phase using an emulsifying agent, wherein said aqueous phase comprises ascorbic acid and has an acidic pH.ltoreq.3.5, and wherein said emulsifying agent is a dimethiconecopolyol, an alkyldimethiconecopolyol or a mixture thereof, said emulsion comprising ascorbic acid, which is stable for at least two months at room temperature.
An emulsion comprising, by weight:
- from 0.5% to 5% of ascorbic acid,
- from 2.5% to 3.5% of cetyldimethiconecopolyol,
- from 3% to 15% of volatile silicone-containing oil,
- from 0.01% to 0.1% of pentasodium ethylenetetra (methylenephosphonic) acid, and
- from 0.5% to 2% of sodium chloride.
A composition suitable for use in the cosmetic dermatological or veterinary fields or any combination thereof, comprising an emulsion comprising an aqueous phase dispersed in an oily phase using an emulsifying agent, wherein said aqueous phase comprises ascorbic acid and has an acidic pH.ltoreq.3.5, and wherein said emulsifying agent is a dimethiconecopolyol, an alkyldimethiconecopolyol or a mixture thereof, wherein said ascorbic acid is stable for at least two months at room temperature.
A method for cosmetic treatment of the skin in order to tone and regenerate it, to smooth out fine lines in the skin, to lighten skin complexion, to remove blemishes from the skin, in order to combat the harmful effects of UV radiation, in order to strengthen skin tissues against environmental attacks, or a combination thereof, comprising applying to the skin of a subject in need thereof, an effective amount of an emulsion comprising an aqueous phase dispersed in an oily phase using an emulsifying agent, wherein said aqueous phase comprises ascorbic acid and has an acidic pH.ltoreq.3.5, and wherein said emulsifying agent is a dimethiconecopolyol, an alkyldimethiconecopolyol or a mixture thereof, wherein said ascorbic acid is stable for at least two months at room temperature.
A cream for dermatological or veterinary use or both, comprising an emulsion comprising an aqueous phase dispersed in an oily phase using an emulsifying agent, wherein said aqueous phase comprises ascorbic acid and has an acidic pH.ltoreq.3.5, and wherein said emulsifying agent is a dimethiconecopolyol, an alkyldimethiconecopolyol or a mixture thereof, wherein said ascorbic acid is stable for at least two months at room temperature in a dermatologically or veterinarially acceptable cream base.
Dependencies are inferred from the claim text.