Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Reexamination Certificate
2001-07-11
2003-01-28
Dodson, Shelley A. (Department: 1651)
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
C424S060000, C424S400000, C424S401000
Reexamination Certificate
active
06511656
ABSTRACT:
The present invention can relate to an emulsion, such as, for example, a cosmetic and/or dermatological emulsion, comprising:
at least one aqueous phase
at least one fatty phase;
at least one flavylium salt compound which is unsubstituted in position 3, substituted with at least one radical chosen from hydroxyl and alkoxy radicals, and, for example, obtained from at least one of synthetically, from a plant extract, and from an enriched plant extract, and, for example, in an amount effective for obtaining, 30 minutes after application to a fair skin, a darkening of the skin color characterized in the L*a*b* calorimetric measuring system by a &Dgr;L* ranging from −0.5 to −20; and
at least one organomodified silicone.
Nowadays, it can be important and/or desirable to look healthy and a tanned skin is always a sign of good health. However, a natural tan may not always desirable since it may require prolonged exposure to UV radiation, for example, UV-A radiation which can causes the tanning of the skin but, however, may induce an adverse change therein, in particular in the case of sensitive skin and/or of skin which is continually exposed to solar radiation. It is thus can be desirable to find an alternative to a natural tan which is compatible with the requirements of such skin types.
Cosmetic products intended for artificially tanning the skin may be based on carbonyl derivatives which, by interacting with the amino acids in the skin, can allow the formation of colored products.
To this end, dihydroxy-acetone (DHA) can be used in cosmetics as an agent for artificially tanning the skin; when applied to the skin, for example, to the face, it can give a tanning or bronzing effect which is similar in appearance to that which may result from prolonged exposure to sunlight (a natural tan) or to a UV lamp.
Drawbacks of DHA can include the length of time it can take for the coloration to develop. For example, several hours (3 to 5 hours in general) can be required for the coloration to be revealed. Thus, there is an increasing demand for self-tanning products that are at least one of fast-acting and give a coloration closer to that of a natural tan.
Efforts are continually being made to find novel compounds and novel compositions which can give the skin an artificial coloration, for example, close to that of a natural tan in at least one of a simple, effective, fast and risk-free manner.
Anthocyanin colorants have been known for a long time as pharmaceutical and food colorants. These anthocyans may be present in nature in the form of heterosides, known as anthocyanosides, and genins, known as anthocyanidines. These anthocyans include phenyl-2-benzopyrylium derivatives and flavylium derivatives and may be present, for example, in plants in the form of salts. Anthocyans may be red-, violet- or blue-colored compounds which can color flowers, fruit, and occasionally leaves. The color observed may depend both on the structure of the predominant genin and on the conditions of the medium in which the anthocyanin colorants are present.
Now, after considerable research conducted in the field of artificial dyeing of the skin, the Inventors have discovered that particular emulsions comprising, as skin-coloring agent, at least one flavylium salt compound which is unsubstituted in position 3 and is substituted with at least one radical chosen from hydroxyl and alkoxy radicals, and at least one organomodified silicone, can make it possible to give skin an artificial coloration, for example, close to that of a natural tan, where the coloration can at least be one of provided immediately and/or in short period of time, good stability, and cosmetically pleasant.
One embodiment of the present invention is an emulsion, such as, for example, at least one of a cosmetic and a dermatological emulsion, comprising:
(a) at least one aqueous phase;
(b) at least one fatty phase;
(c) at least one flavylium salt compound which is unsubstituted in position 3, substituted with at least one radical chosen from hydroxyl and alkoxy radicals, and, for example, obtained at least one of synthetically, from a plant extract, and from an enriched plant extract, and, for example, in an amount effective for obtaining, 30 minutes after application to a fair skin, a darkening of the skin color characterized in the L*a*b* calorimetric measuring system by a &Dgr;L* ranging from −0.5 to −20; and
(d) at least one organomodified silicone. The flavylium salt may be present in the emulsion in an amount effective for delivering 2 mg/cm
2
upon application to the skin.
As used herein, the expressions “cosmetic or dermatological emulsion,” “cosmetic emulsion,” “dermatological emulsion,” and grammatical variants thereof refer to any emulsion whose aqueous phase and fatty phase comprise substances that are at least one of cosmetically and/or dermatologically acceptable for topical application to the skin.
According to certain embodiments, the present invention comprises a method of providing skin with an artificial coloration, for example, close to that of a natural tan, comprising the use of at least one flavylium salt compound which is unsubstituted in position 3, substituted with at least one radical chosen from hydroxyl and alkoxy radicals, and, for example, obtained at least one of synthetically, from a plant extract, and from an enriched plant extract, and the use of at least one organomodified silicone, in a cosmetic and/or dermatological composition.
According to certain embodiments, the present invention comprises a process for giving the skin an artificial coloration, such as close to that of a natural tan, comprising applying to the skin a cosmetic composition comprising an effective amount of at least one flavylium salt compound which is unsubstituted in position 3, substituted with at least one radical chosen from hydroxyl and alkoxy radicals, and, for example, obtained at least one of synthetically, from a plant extract, and from an enriched plant extract; and of at least one organomodified silicone.
According to certain embodiments, the present invention comprises using an emulsion to manufacture cosmetic compositions for coloring the skin.
According to certain embodiments, the present invention comprises including an organomodified silicone in a cosmetic and/or dermatological emulsion comprising at least one flavylium salt compound which is unsubstituted in position 3, and which is substituted with at least one radical chosen from hydroxyl and alkoxy radicals. The emulsion may be used, for example, to at least one of obtain an immediate or relatively rapid coloration of the skin, provide good physical stability to the composition, and be cosmetically pleasant.
According to certain embodiments, the compositions and uses in accordance with the present invention can make it possible to obtain an artificial coloration close to that of a natural tan in a short space of time. Thus, an immediate or short time coloration is obtained, which can allow the application to be visualized and consequently can allow more uniform spreading of the composition on the skin and thus of the resulting coloration.
As used herein, the expressions “composition intended for artificially coloring the skin,” “emulsions intended for artificially coloring the skin,” and grammatical variants there of are understood to mean formulations with will be understood to mean a formulation with a particular affinity for the skin which allows it to give the skin a long-lasting coloration, which may be at least one of non-covering (that is to say which does not have a tendency to opacify the skin), not removed with at least one of water and solvents, and able to withstand both rubbing and washing with a solution containing surfactants. Such a long-lasting coloration may thus be distinguished from the superficial and transient coloration provided, for example, by a make-up product.
In accordance with the generally accepted definition, the term “silicone” is understood to mean any organosilicone polymer or oligomer chosen from linear, cyclic, bra
Candau Didier
Elguidj Irène
Forestier Serge
Dodson Shelley A.
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
L'Oreal (S.A.)
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