Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1998-04-28
2001-05-22
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S064000
Reexamination Certificate
active
06235293
ABSTRACT:
The present invention relates to compositions, in particular cosmetic compositions, which can be applied to the skin, semi-mucous membranes and/or mucous membranes. The compositions in particular comprise a polymer system and can be used as a make-up product.
Compositions to be applied to the skin, to semi-mucous membranes and/or to mucous membranes, such as lipsticks and foundations, are generally in the form of sticks, supple pastes or cast pastes and include fatty substances such as oils, pasty compounds and/or waxes, and a particular phase generally composed of fillers and pigments.
However, when they are applied to the support, these compositions have the drawback of transferring. This is understood to mean that the composition is liable to become deposited, at least partly, onto certain supports with which it is placed in contact, such as, for example, a glass, a cup, clothing or the skin. On becoming deposited, the composition leaves a trace on the support. This thus results in mediocre persistence of the composition on the skin, the semi-mucous membranes or the mucous membranes, and makes repeated application of the composition at regular intervals necessary.
Moreover, the appearance of unacceptable traces on certain items of clothing, and in particular on the collars of shirts, may put certain consumers off using this type of make-up.
Another drawback of these compositions lies in the problem of migration, since it has been observed that certain compositions have a tendency to travel in the wrinkles and/or fine lines in the skin, in the case of foundations; in the fine lines around the lips, in the case of lipsticks; and in the folds of the eyelids, in the case of eyeshadows. It has also been observed, especially in the case of eyeshadows, that lines appear in the make-up, these lines being generated by the movements of the eyelids. It has also been observed that eyeliners can also run. All of these phenomena give rise to an aesthetically unpleasant effect which it would obviously be desirable to avoid.
Many cosmeticians have for several years been interested in “transfer-free” cosmetic compositions, which transfer only a little or not at all, especially transfer-free lipsticks or foundations. Thus, transfer-free lipstick compositions containing from 1 to 70% by weight of liquid silicone resin containing repeating silicate units, from 10 to 98% by weight of a volatile silicone oil and pulverulent fillers have been envisaged. However, the film obtained on the lips after the silicone oil has evaporated has the drawback of becoming uncomfortable over time (sensation of dryness and tautness).
Transfer-free lipsticks containing a volatile silicone and a silicone resin containing an esterified pendant chain having at least 12 carbon atoms are also known. The film of lipstick especially has the drawback of lacking in comfort once it has been applied, in particular of being too dry.
There is thus still a need for a cosmetic composition which transfers little or not at all, i.e. a “transfer-free” composition, while at the same time having good cosmetic properties, and in particular allowing a flexible and homogeneous film to be obtained.
The aim of the present invention is to propose a composition which makes it possible to obtain a film with very good staying power, which does not transfer and does not mark a support with which it might come into contact, and which does not migrate over time.
Thus, one subject of the invention is a composition which can be applied to a support selected from the skin, semi-mucous membranes and/or mucous membranes, in particular a lip stick composition, comprising a polymer system comprising at least one film-forming radical polymer, the polymer system (or the film formed therefrom) having a glass transition temperature (Tg) less than or equal to 10° C. and a minimum film-forming temperature (MFT) less than or equal to 15° C., the polymer system being capable of forming a film having a hardness of less than or equal to 50.
Another subject of the invention is a lip composition containing a polymer composition capable of forming a film on the lips and of following the movements of the lips, the polymer system comprising a radical film-forming polymer obtained from the copolymerization of C
1
-C
8
alkyl methacrylate monomers, optionally combined with acrylic acid, styrene and &agr;-methylstyrene.
Another subject of the invention is a non-therapeutic treatment or make-up process for a support selected from the skin, semi-mucous membranes and/or mucous membranes, in particular the lips of the face, this process consisting in applying a polymer system or a composition comprising it, as defined above, to the support.
Another subject is the use, for the manufacture of a composition intended for therapeutically treating the skin, semi-mucous membranes and/or mucous membranes, in particular the lips of the face, of the polymer system or of a composition comprising it.
Another subject is the use, in a composition which can be applied to the skin, semi-mucous membranes and/or mucous membranes, of the polymer system in order to reduce the transfer and/or migration of the composition.
It has been observed that the composition according to the invention can be applied easily and can spread easily and uniformly on the skin, semi-mucous membranes and mucous membranes, in particular the lips of the face.
The composition according to the invention especially finds a particularly advantageous application in the field of making up and/or care for the skin, mucous membranes and/or semi-mucous membranes. The term mucous membrane is understood to refer in particular to the inner part of the lower eyelid; the term semi-mucous membranes is understood to refer more particularly to the lips of the face.
The composition according to the invention can provide a homogeneous film which has a light texture and remains comfortable to wear throughout the day. The film is soft, supple, elastic and flexible on the skin, while at the same time retaining good cohesion; it follows the movements of the support on which it is deposited, without cracking and/or becoming detached. In particular, it adheres perfectly to the lips of the face. Thus, the film obtained after application of the composition to the support is capable of showing good staying power on this support. The composition according to the invention is also suitable for making up the body. The composition according to the invention can be applied most particularly in the field of make-up products for the lips of the face, in particular as a lip composition, preferably a lipstick. It also finds another advantageous application in the field of eyeliners.
Moreover, the film obtained can be very shiny, or more or less matte, depending on the nature of the constituents in the composition, resulting in a wider range of shiny or matte make-up products to choose from.
The composition according to the invention thus comprises a polymer system which comprises at least one radical-type synthetic film-forming polymer. The term radical polymer is understood to refer to a polymer obtained by polymerization of monomers containing unsaturation, especially ethylenic unsaturation, each monomer being capable of homopolymerizing (in contrast to polycondensates).
Radical-type polymers can preferably be vinylic polymers or copolymers, especially acrylic polymers.
Vinylic polymers can preferably result from the polymerization of monomers containing ethylenic unsaturation having at least one acid group and/or esters of these acidic monomers and/or amides of these acidic monomers.
Anionic radical polymers, i.e. monomers having at least one monomer containing an acidic group, are preferably used.
&agr;,&bgr;-ethylenically unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid and 2-acrylamido-2-methylpropanesulphonic acid can preferably be used as monomers bearing an acidic group. (Meth)acrylic acid and crotonic acid are more preferably used, and even more preferably (meth)acrylic acid.
The
Bara Isabelle
de la Poterie Valerie
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Howard S.
L'Oreal
Page Thurman K.
LandOfFree
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