Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1998-12-22
2004-01-27
Hartley, Michael G. (Department: 1616)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S063000, C424S064000, C424S069000, C424S078020, C514S937000
Reexamination Certificate
active
06682748
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a composition comprising a polymer which is dispersible in a fatty phase and a fat-soluble polymer, which may be used in particular, for the cosmetic, dermatological, pharmaceutical and hygiene fields. More particularly, the invention relates to a transfer-free composition for caring for and/or making up the skin, both of the human face and of the human body, mucous membranes, such as the lips and the interior of the lower eyelids, or superficial body growth, such as the eyelashes, eyebrows, nails and hair.
The inventive composition can be provided in particular in the form of a product cast as a stick or as a dish, such as lipsticks or lip balms, cast foundations, products for concealing rings under the eyes, eyeshadows or blushers, or in the form of a more or less fluid paste or cream, such as fluid foundations or lipsticks, eyeliners, solar protection compositions or compositions for coloring the skin.
2. Background of the Invention
The products for making up or caring for the skin or lips of human beings, such as foundations or lipsticks, generally comprise fatty phases, such as waxes and oils, pigments and/or fillers and, optionally, additives, such as cosmetic or dermatological active principles. They can also comprise so-called “pasty” products with a supple consistency which make it possible to produce colored or non-colored pastes to be applied with a brush.
These compositions, when they are applied to the skin or the lips, exhibit the disadvantage of transferring, that is to say of being at least partly deposited and leaving traces on certain substrates with which they can be brought into contact, in particular a glass, a cup, a cigarette, an item of clothing or the skin. This results in mediocre persistence of the applied film, requiring the regular renewal of the application of the foundation or lipstick composition. Furthermore, the appearance of these unacceptable traces, in particular on blouse collars, can dissuade some women from using this type of make-up.
For some years,.cosmetic scientists have been interested in lipstick compositions and more recently in foundation compositions which are “transfer-free”. Thus, Shiseido described in JP-A-61-65809, “transfer-free” lipstick compositions comprising a siloxysilicate resin (with a three-dimensional network), a volatile silicone oil with a cyclic silicone chain and pulverulent fillers. Likewise, Noevier described in JP-A-62-61911, “transfer-free” lipstick, eyeliner and foundation compositions comprising one or more volatile silicones in combination with one or more hydrocarbon-comprising waxes.
These compositions, although exhibiting improved “transfer-free” properties, have the disadvantage of leaving on the lips, after evaporation of the silicone oils, a film which becomes uncomfortable over time (feeling of drying and of tautness), dissuading a number of women from this type of lipstick. In order to improve the comfort of this type of composition, non-volatile silicone or non-silicone oils could be added but, in this case, “transfer-free” efficiency is lost.
More recently, Procter & Gamble has described in WO-A-96/36308, mascara compositions of water-in-oil emulsion type which exhibit a lengthy hold and resistance to water and which do not leave traces. These compositions comprise, inter alia, a water-insoluble polymer, generally known as a latex, in combination with a lipophilic polymer of the copolymer type, a surfactant of the alkyl or alkoxy dimethicone copolyol type, hydrocarbon-comprising oils, pigments and fillers, as well as waxes.
Compositions based on silicone oils and silicone resins, as well as those based on latex, result in matt colored films. Now, women today are looking for products, in particular for coloring the lips, which are glossy. Furthermore, the transfer-free properties of the films deposited are not perfect. In particular, pronounced pressure or rubbing results in a decrease in the color of the deposit and in a redeposition on the substrate brought into contact with these films.
In addition, EP-A-497,144 and FR-A-2,357,244 describe so-called “transfer-free” compositions comprising a styrene-ethylene-propylene block polymer in combination with waxes, light or volatile oils, and pigments. These compositions exhibit the disadvantage of being not very comfortable, of having indifferent cosmetic properties and of being difficult to formulate. Furthermore, the “transfer-free” properties of these compositions are very mediocre, at best.
The need thus remains for a composition which does not exhibit the above disadvantages and which has in particular total “transfer-free” properties, even during pronounced or intensive pressure or rubbing, and a more or less glossy appearance, suited to the wish of the consumer, and which does not dry over time the skin or the lips on which it is applied.
SUMMARY OF THE INVENTION
The inventors have found, entirely surprisingly, that the use of a polymer which is dispersible in a fatty phase and of a fat-soluble polymer in a cosmetic, dermatological, pharmaceutical or hygiene composition provides a glossy film, with very good hold, which does not transfer at all and which is resistant to water, while being very pleasant on application and to wear throughout the day. The film is in particular supple, flexible, non-greasy and non-sticky.
Thus, the present invention includes a composition for topical application comprising a liquid fatty phase, characterized in that it additionally comprises at least 2% by weight, with respect to the total weight of the composition, of polymer which is dispersible in the liquid fatty phase and a polymer which is soluble in the fatty phase.
This composition is in particular a cosmetic, dermatological, hygiene or pharmaceutical composition. It thus comprises ingredients which are compatible with the skin, mucous membranes and keratinous fibers or superficial body growth.
Another subject of the invention is a composition which is provided in the form of a cast product and which comprises at least one cosmetic, dermatological, hygiene or pharmaceutical liquid fatty phase and at least one wax which is solid at room temperature, characterized in that it additionally comprises at least 2% by weight, with respect to the total weight of the composition, of polymer which is dispersible in the liquid fatty phase and at least one polymer which is soluble in the fatty phase.
The composition advantageously comprises ingredients chosen from cosmetic, dermatological, hygiene or pharmaceutical active principles and coloring materials.
The dispersible polymer or polymers which can be used in the present application can be of any nature. Thus, it is possible to employ a radical polymer, a polycondensate, even a polymer of natural origin, and their mixtures. The polymer can be chosen by the person skilled in the art as a function of its properties and according to the subsequent application desired for the composition. Thus, the polymer may or may not be able to form a film.
However, the production of an entirely “transfer-free” film is more especially due to the use of a polymer which can form a film.
The composition of the invention may comprise one or more polymers which are soluble in the liquid fatty phase exhibiting a mean molecular weight of 500 to 1,000,000 and better still of 5,000 to 15,000. Such fat-soluble polymers play in particular the role of plasticizer of the film, enhancing its hold over time, a property independent of the transfer-free properties, without, however, rendering it sticky. These polymers may or may not be gelling agents of the liquid fatty phase. They make it possible to increase the viscosity of the composition as well as the satiny, indeed glossy, appearance of the film. Thus, by varying the amount of these polymers and their nature, it is possible to adjust the gloss of the film, which is much valued by formulators and users.
The fat-soluble polymers of the composition of the invention are preferably used in an amount of 0.5% to
De La Poterie Valérie
Mougin Nathalie
Gollamudi Sharmila S.
Hartley Michael G.
L'Oreal
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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