Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-04-17
2002-03-26
Dudash, Diana (Department: 1619)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S078020, C424S063000, C514S844000, C514S845000
Reexamination Certificate
active
06361782
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a composition in anhydrous form for caring for and/or making up the skin of both the human face and body, containing polymer particles which are dispersible in a fatty phase and a dyestuff. This composition is especially suitable for cosmetics and dermatology, and in particular allows the camouflaging of marks (vitiligo), skin pigmentation defects, dyschromia (angiomas) and couperose. This composition also has noteworthy water-resistance and transfer-resistance properties.
This composition can be in particular in the form of a paste, a gel or a cream which is more or less fluid and can be a foundation, a tinted skincare composition, an antisun composition, a composition for artificially tanning the skin or a make-up composition for the body, or alternatively an eyeshadow, a face powder or a concealer product.
2. Discussion of the Background
To camouflage marks, in particular age marks, due to impaired melanogenesis, skin pigmentation defects, dyschromia, couperose, diffuse irrigations (appearance of small blood vessels under the skin) and telangiectasia, foundations with high covering power are generally used. These foundations generally contain fatty phases such as waxes and oils, pigments and/or fillers and, optionally, additives such as cosmetic or dermatological active agents.
They can also contain “pasty” products having a soft consistency, thus making it possible to obtain colored pastes to be applied with a brush, the fingers or a sponge.
When are applied to the skin, these compositions have the drawback of transferring, i.e. of becoming at least partly deposited or leaving marks on certain supports with which they may come into contact such as the clothing or the skin. This results in mediocre persistence of the film applied, making it necessary to freshen the application of the foundation composition regularly. Moreover, the appearance of these unacceptable marks in particular on shirt collars may put certain women off using this type of product.
EP-A-709 083 describes foundations containing volatile silicones and a silicone resin having a three-dimensional structure, which have “transfer-resistance” properties. Unfortunately, after the silicone oils evaporate, these foundations have the drawback of leaving a film on the skin, which becomes uncomfortable over time (sensation of drying out and of tautness), which may put certain women off products of this type. To improve the level of comfort of these products, non-volatile silicone or non-silicone oils may be added thereto, but, in this specific case, the “transfer-resistance” efficacy would be lost.
More recently, EP-A-775 483 has envisaged skin compositions in the form of an aqueous dispersion of film-forming polymer. These compositions have good “transfer-reference” and water-resistance properties. Unfortunately, after the water evaporates, these films have the drawback of being uncomfortable over time.
At the present time, there is no simple and long-lasting means for hiding marks on the hands and the body of human beings, which does not mark clothing and which is resistant to water, sweat and sebum.
A need thus exists for a composition that does not have the above drawbacks, and in particular has properties of camouflaging the marks and other dyschromias on the skin and diffuse blood irrigations, and which is long-lasting, while at the same time having noteworthy “transfer-resistance” properties, even under pronounced pressure or rubbing, and which does not dry out the skin onto which it is applied, either during application or over time.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a composition that does not have the above-described drawbacks.
It is another object of the present invention to provide a composition that has the properties of camouflaging the marks and other dyschromias on the skin and diffuse blood irrigations.
It is another object of the present invention to provide a composition that is long-lasting.
It is another object of the present invention to provide a composition that has noteworthy “transfer-resistance” properties, even under pronounced pressure or rubbing.
It is another object of the present invention to provide a composition that does not dry out the skin onto which it is applied, either during application or over time.
These and other objects of the invention have been attained by the present invention, the first embodiment of which provides an anhydrous composition for the skin, including:
a liquid fatty phase including polymer particles that are dispersed and surface-stabilized therein, and
a dyestuff, wherein
the liquid fatty phase includes a volatile liquid phase and a non-volatile liquid phase, the non-volatile phase having a solubility parameter &dgr;
h
≦5 (J/cm
3
)
½
and wherein a volatile phase
on-volatile phase weight ratio ranges from 2 to 25.
Another embodiment of the present invention provides a method of reducing or eliminating eliminate marks, dyschromia, pigmentation defects, couperose and/or diffuse blood irrigations appearing across the skin, that includes applying to the skin an anhydrous composition for the skin, including:
a liquid fatty phase including polymer particles that are dispersed and surface-stabilized therein, and
a dyestuff, wherein
the liquid fatty phase includes a volatile liquid phase and a non-volatile liquid phase, the non-volatile phase having a solubility parameter &dgr;
h
≦5 (J/cm
3
)
½
and wherein a volatile phase
on-volatile phase weight ratio ranges from 2 to 25.
Another embodiment of the invention provides a non-therapeutic or cosmetic process for the camouflaging and/or the remanent camouflaging of marks, skin pigmentation defects, dyschromia, couperose, diff-use blood irrigations appearing across the skin and telangiectasias, including applying to the skin an anhydrous composition for the skin, including:
a liquid fatty phase including polymer particles that are dispersed and surface-stabilized therein, and
a dyestuff, wherein
the liquid fatty phase includes a volatile liquid phase and a non-volatile liquid phase, the non-volatile phase having a solubility parameter &dgr;
h
≦5 (J/cm
3
)
½
and wherein a volatile phase
on-volatile phase weight ratio ranges from 2 to 25.
By use of the present invention, it is possible to obtain a cosmetic or dermatological composition which gives a covering and camouflaging cohesive deposit, which has very good staying power, does not transfer at all and is resistant to water, sweat and sebum, while at the same time being very pleasant to apply and to wear throughout the day. In particular, the deposit is not greasy or dry, and is flexible and non-sticky.
DETAILED DESCRIPTION OF THE INVENTION
Various other objects, features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understood from the following detailed description of the preferred embodiments of the invention.
The expression “liquid fatty phase” preferably means any non-aqueous medium which is liquid at room temperature (25° C.) and atmospheric pressure (760 mmHg). The expression “volatile liquid phase” preferably means any non-aqueous medium which can evaporate on contact with the skin in less than an hour, at room temperature and atmospheric pressure. This volatile phase preferably includes oils having a non-zero vapor pressure, at room temperature and atmospheric pressure, ranging more preferably from 10
−3
to 300 mmHg (0.13 Pa to 40,000 Pa), and most preferably 10
−2
to 100 mmHg. These ranges include all values and subranges therebetween. The liquid phase which does not correspond to this last definition is a nonvolatile liquid phase.
For a volatile phase
on-volatile phase weight ratio, this ratio being denoted as R, of less than 2, a film is obtained on the skin which does not dry, feels tacky and transfers. The camouflaging is thus not remanent. For a ratio R of greater than 25, a film is obtained which dr
Chevalier Veronique
Hurel Valerie
Dudash Diana
L'Oreal
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Yu Gina
LandOfFree
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