Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-07-14
2002-04-16
Dees, Jose′ G. (Department: 1616)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S070100
Reexamination Certificate
active
06372235
ABSTRACT:
The present invention relates to a solid composition, for example a cosmetic composition such as a care, treatment and/or make-up composition for the skin, including the scalp, and/or for the lips of human beings, comprising a thickened liquid fatty phase. The composition can be in the form of a stick or tube of make-up, such as a lipstick, the application of which can give a glossy, non-migrating deposit.
It is common practice to use a structured, i.e., thickened or gelled, liquid fatty phase in compositions, such as in cosmetic and dermatological compositions, in order to obtain the desired consistency. The thickening of oils (or of phases that are liquid at room temperature) makes it easier to take up the product from its packaging without any significant loss, to limit the diffusion of the product to the local treatment area, to distribute the product uniformly over the local treatment area, or to be able to use the product in amounts that are sufficient to obtain the desired cosmetic or dermatological effect. This is especially the case in solid compositions such as deodorants, lip balms and lipsticks, concealer products and cast foundations. This thickening is desirable for care, hygiene or make-up compositions such as lipsticks, which are preferably distributed homogeneously over the local surface to be treated, as well as for hair compositions, which are preferably spread and distributed uniformly along the keratin fibers and which preferably do not run down the forehead, the nape of the neck, the face or into the eyes.
To overcome these problems, use is usually made of waxes or fillers. Unfortunately, these waxes and/or fillers have a tendency to make the composition matte and opaque, which is not always desirable, in particular for a lipstick. Specifically, women are always in search of a lipstick in the form of a tube which gives a glossy film; moreover, certain compositions such as lip balms or ointments can be in the form of translucent, or even transparent, sticks.
It is also known practice to thicken oils with polymeric thickeners. Unfortunately, the known thickeners for oils have to be used in large amounts in order to obtain a gel of high viscosity, for example of greater than 1.3 Pa.s. However, too large an amount of thickener can give the composition inadequate cosmetic properties, in particular, a sticky feel and a lack of slipperiness. These drawbacks can potentially be very inconvenient, or even prohibitive.
The structuring of the liquid fatty phase makes it possible to limit its exudation from solid compositions and, in addition, to limit the migration of this phase in wrinkles and fine lines after it has been deposited on the skin or the lips, which is a particularly desired quality for a lipstick. The reason for this is that a large migration of the liquid fatty phase, charged with dyestuffs, leads to an unaesthetic effect around the lips, which particularly accentuates wrinkles and fine lines. This migration is often mentioned by women as a major defect of conventional lipsticks.
The aim of the present invention is to produce a composition, such as a cosmetic composition, which is in solid form, comprises little or no wax, and is capable of conserving good cosmetic properties, such as a certain level of translucency.
A subject of the invention is thus a composition, such as a cosmetic or dermatological composition, which is in solid form, comprising at least one oil and at least one compound defined by formula I as described below, wherein the composition comprises less than about 5% by weight of wax relative to the total weight of the composition.
The composition can be in the form of a translucent, or even transparent, anhydrous stick. It can also be an optionally colored “transfer-resistant” or “non-migrating” composition.
Another subject of the invention is a cosmetic treatment process for a support chosen from facial and body skin, mucous membranes and keratin fibers, comprising applying to the support a composition as defined above.
Another subject of the invention is the use in a composition, such as a cosmetic or dermatological composition, which is in solid form and which comprises at least one oil and less than about 5% of wax relative to the total weight of the composition, of a sufficient amount of at least one compound of formula I described below, in order to structure/gel the composition.
It has been found that the use of the compounds of formula I makes it possible to structure liquid fatty phases, or oily phases, or even to gel them completely, and thus to obtain stable cosmetic compositions in solid gelled form, which may be free of waxes. This is true even when a very low content of the compound of formula I is used.
The composition according to the invention has good cosmetic properties: it is not sticky when applied, and is slippery and easy to apply. It gives a homogeneous, uniform film which covers well and is comfortable to wear.
Furthermore, the composition can advantageously be clear, transparent or translucent. The terms “translucent” and “transparent” can be understood by the conventional definitions given in the dictionary. Thus, a translucent composition allows light to pass through without, however, allowing the contours of objects to be sharply distinguished. A transparent composition allows light to pass through easily and allows objects to be sharply distinguished through its thickness.
In general, a transparent composition will have a maximum light transmittance value, irrespective of the wavelength from 400 nm to 800 nm, of at least 35% through a 1 cm thick sample, and in another embodiment, of at least 50% (see EP 291 334, the disclosure of which is incorporated by reference herein). A translucent composition, for its part, will generally have a maximum light transmittance value ranging from 2% to 35%.
The transmittance can be measured by placing a 1 cm thick sample in the light beam of a spectrophotometer working in the wavelengths of the luminous spectrum.
Moreover, the compounds of formula I can advantageously be used to prepare colored “transfer-resistant” compositions, for which there is very limited migration of the colored film in wrinkles and fine lines, such as those around the lips or the eyes. These compositions also have the advantage of not being deposited, or of being only slightly deposited, on certain supports with which they are placed in contact, such as, for example, a glass, an item of clothing or the skin.
The composition according to the invention thus comprises at least one compound corresponding to formula I:
wherein:
the variables R are chosen, independently of each other, from a hydrogen atom and a linear or branched, saturated hydrocarbon-based chain comprising 1 to 6 carbon atoms, and in another embodiment, 1 to 4 carbon atoms; and
the variables Y are chosen, independently of each other, from the following groups: —CO—S—R′; —CO—NHR′; NH—COR′ and —S—COR′; wherein the variables R′ are chosen, independently of each other, from:
a hydrogen atom;
an aryl group;
an aralkyl group, such as an aryl group substituted with a linear or branched, saturated hydrocarbon-based chain comprising 1 to 22 carbon atoms, and in another embodiment, 10 to 18 carbon atoms; and
a linear, branched or cyclic, saturated hydrocarbon-based chain comprising 1 to 22 carbon atoms, and in another embodiment, 10 to 18 carbon atoms, and optionally substituted with one or more groups chosen from aryl, ester, amide and urethane groups; and/or optionally comprising one or more hetero atoms chosen from O, S and N; and/or optionally substituted with one or more fluorine atoms and/or hydroxyl radicals.
In one embodiment of the invention, the variables R are hydrogen atoms.
In another embodiment, the variables Y are chosen, independently from each other, from the groups —CO—NHR′ and —NH—COR′.
According to another embodiment of the invention, the variables R′ are chosen, independently from each other, from an aryl group, an aralkyl group wherein the linear or branched alkyl chain co
Livoreil Aude
Mougin Nathalie
Dees Jose′ G.
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
George Konata M.
L'Oreal (S.A.)
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