Drug – bio-affecting and body treating compositions – Live skin colorant containing
Reexamination Certificate
1999-12-10
2001-12-25
Dees, Jose′ G. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live skin colorant containing
C424S401000, C424S059000, C424S061000, C424S064000, C424S070100
Reexamination Certificate
active
06333026
ABSTRACT:
A subject-matter of the present invention is the use of an indigoid compound in a cosmetic composition, in particular a make-up composition, in order to confer on it antimicrobial properties and the property of lengthy hold over time and/or the property of non-migration and/or the property of freedom from transfer and/or the property of non-formation of streaks, as well as a cosmetic composition, in particular a make-up composition, comprising such an indigoid compound in combination with a silicone binder.
Cosmetic compositions and in particular make-up compositions, such as free or compact powders, foundations, face powders, eyeshadows, lipsticks or nail varnishes, are composed of an appropriate vehicle and of various colouring agents intended to confer a certain colour on the said compositions before and/or after their application to the skin, mucous membranes, such as the internal part of the lower eyelids, semi-mucous membranes, such as the lips, and/or superficial body growths, such as the nails, eyelashes, eyebrows or hair.
A fairly limited range of colouring agents is used today to create colours, among which colouring agents may be mentioned compounds which are generally insoluble in aqueous and organic media, such as organic lakes, inorganic pigments or pearlescent pigments.
The pigments and lakes used in the make-up field are highly varied in origin and in chemical nature. Their physicochemical properties, in particular particle size, specific surface, relative density and the like, are therefore very different. These difference are reflected by variations in behaviour: their ease of use or dispersion in the medium, their stability with regard to light or to temperature, their mechanical properties, their hold over time, their colouring power and their covering power.
Thus, inorganic pigments, in particular inorganic oxides, such as iron oxides, ultramarine blue, Prussian blue (ferric ferrocyanide), cobalt blue (CoOAl
2
O
3
) or manganese violet, are very stable with regard to light and pH but give rather lifeless, dull and pale colours and/or colours with a weak colouring power, the colours being easily diluted when they are mixed with a white pigment of the titanium dioxide type, and/or colours with a weak covering power, that is to say transparent on application. It is therefore necessary to introduce a large amount of them into the cosmetic formulations in order to obtain a sufficiently saturated feature. This high percentage of inorganic particles can, nevertheless, affect the gloss of the composition, its homogeneity on application, its hold and its comfort. In addition, for manganese violet, the appearance of mould is observed at the surface of some compositions.
Use may also be made, in order to obtain coloured effects, of pearlescent pigments of varied but never very intense colours, which make it possible to obtain iridescent but mostly fairly weak effects.
In the field of temporary or transient hair colouring, which gives rise to a slight modification of the natural colour of the hair which lasts from one shampooing to another and which serves to beautify or correct a shade which has already been obtained, provision has already been made for colouring with conventional inorganic pigments, in order to introduce a temporary highlight to the hair, but the shades obtained by this colouring remain fairly lifeless, too uniform and not very playful.
In the field of make-up, only organic lakes have until now made it possible to obtain vivid or intense colours. However, most organic lakes exhibit very poor hold with regard to light, which results in a very marked attenuation in their colour over time, are very transparent on application, that is to say have little covering power, and have a weak colouring power. They can also be unstable with regard to temperature and/or pH. Furthermore, some lakes result in an excessive degree of bleeding, that is to say that they exhibit the disadvantage of staining the support to which they are applied. Thus, this can have the consequence of staining ocular lenses, in the case of eyeliners or mascaras, or of leaving a colouring on the skin or nails after the removal of make-up, in the case of lipsticks or nail varnishes. Finally, the instability of lakes is further exacerbated when they are used in combination with photoreactive pigments, such as titanium dioxide. In point of fact, these pigments are very widely used in make-up, in particular for protection against UV radiation. Consequently, the use of organic lakes in cosmetics is fairly limited, the consequence of which is a limitation in the tints achievable.
Thus, the need remains to have available colouring agents which can be used in cosmetics and which make it possible to obtain an appropriate colouring of the compositions and of the make-up film obtained, it being necessary for the said colouring agents not to migrate or to bleed onto the support on which the said compositions are deposited or not to transfer onto another support and it being necessary for the said colouring agents to have a high colouring power, a high covering power and a lengthy hold over time, without the appearance of streaks, in particular on the eyelids. Furthermore, these colouring agents must not promote the growth of mould.
After much research, the Applicant Company has demonstrated that the use of a very specific family of organic compounds makes it possible to obtain such a result.
Thus, a subject-matter of the invention is the use of at least one indigoid compound of formula (I):
in which:
R
1
and R′
1
are, independently of another, saturated or unsaturated, linear, branched or cyclic alkyl radicals having 1 to 18 carbon atoms which are optionally substituted by one or more halogens and/or by one or more hydroxyl radicals and/or interrupted by one or more heteroatoms;
R
2
, R′
2
, R
3
, R′
3
, R
4
, R′
4
, R
5
and R′
5
are, independently of one another, chosen from a hydrogen atom, a halogen atom, a hydroxyl radical or a saturated or unsaturated, linear or branched, alkyl, alkyloxy, acyl or acyloxy radical having 1 to 6 carbon atoms, in a cosmetic composition, in particular a make-up composition, in order to confer on it at least one of decreasing or eliminating the migration potential of the cosmetic composition, decreasing or eliminating the transferability of the cosmetic composition, and decreasing or eliminating the streak forming capacity of a cosmetic composition, to impart, for example, properties of lengthy hold over time and/or of non-migration and/or of freedom from transfer and/or of non-formation of streaks, in particular on the eyelids.
Another subject-matter of the invention is the use of at least one indigoid compound of above formula (I) in the antimicrobial protection of cosmetic compositions, in particular make-up compositions.
It is usual to introduce silicone binders into cosmetic compositions, in particular make-up compositions, in order to facilitate the application and the spreading thereof while providing comfort and softness.
However, the inventor has found that the absence of non-volatile silicone oil in the silicone binder of make-up compositions has a tendency to decrease the hold over time of these compositions, in particular of eyeshadows. In the absence of non-volatile silicone oil, the eyeshadow is converted to powder and does not hold.
The inventor has discovered, surprisingly, that, by combining silicone oils, in particular non-volatile silicone oils, in cosmetic compositions, in particular make-up compositions, with an indigoid colouring agent of above formula (I), she obtains cosmetic compositions having not only good spreading, comfort and softness properties but also good properties of hold over time, both as regards the colour and the make-up.
Furthermore, the make-up compositions thus obtained can confer an intense, in particular blue, very saturated and very covering colour which does not fade over time. They do not migrate and do not bleed onto (do not stain) the support on which they are deposited; they do not
Dees Jose′ G.
George Konata M.
L'Oreal
Nixon & Vanderhye P.C.
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