FR2815907A1 - SYSTEM FOR TRANSFERRING A COLORED PATTERN ON THE SKIN AND USES THEREOF - Google Patents

Abstract

The invention concerns a system for transferring a coloured pattern on the skin comprising: a base layer (1); a hydrogel matrix (2) including a skin colouring agent and at least a hydrophilic gelling agent; the base layer (1) being impermeable to the skin colouring agent. The invention also concerns a method for semi-permanent colouring of the skin using said system. The inventive system and method enable to produce decorative patterns on the skin securely, simply, comfortably and inexpensively.

Description

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SYSTEM FOR TRANSFERRING A COLORED PATTERN ON THE SKIN AND
USES The present invention relates to a system for transferring a colored pattern making it possible to create semi-temporary decorative patterns on the skin. It also relates to its uses in the cosmetic field, in particular make-up and in particular make-up of the body.

One of the best known methods of creating decorative patterns on the skin is permanent tattooing. However, this process has many drawbacks: it involves a needle which not only must be handled by a specialist but which can also be a source of infections. In addition, this process is painful and expensive. Finally, its permanent nature can also have a drawback: the tattoo cannot be used as an accessory or as a temporary make-up which can be changed frequently and quickly. Nowadays, we want to decorate our body temporarily and to be able to change the decoration easily and at will.

There are many methods for creating non-permanent or semi-permanent decorative patterns on the skin. By non-permanent or semi-permanent is meant a coloration which remains on the skin for a period ranging from a few hours to several weeks.

There are also tattoos that are called sunglasses that use the stencil principle. The method consists in fixing adhesive images in the form of a stencil on an area of skin and then subjecting said area to UV radiation. The pattern is formed by the difference in pigmentation by the sun between tanned and non-tanned skin. However, it is known that UV-A radiation which causes browning of the skin is capable of inducing an alteration of the latter, in particular in the case of sensitive skin or of skin continuously exposed to solar radiation. Furthermore, obtaining and storing such tattoos is random (depending on the intensity of the sunshine) and / or restrictive (use of UV lamps). In addition, the tattoo obtained lasts the time of the tan, time that we cannot always control.

Another common process for creating decorative patterns on the skin is through decals which transfer a printed image to the skin after moistening. However, the images thus obtained are not always very clear, the ink may smear. In addition, these images often disappear very quickly with water or rubbing.

To obtain a more durable coloring, many processes involve henna which tints the stratum corneum of the skin and which can thus remain on its surface for 1 to 4 weeks. However, the classic application of henna on the skin requires a certain mastery of drawing techniques and should preferably be performed by an artist. Indeed, henna is generally

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appliqué sous la forme d'une pâte ou d'une crème qui tâche la peau. Ainsi, cette pâte peut baver ou être malencontreusement appliquée à un endroit du corps non prévu par des mains malhabiles. Par ailleurs, une fois appliquée sur le corps, cette pâte peut également tâcher les vêtements.

applied in the form of a paste or cream that stains the skin. Thus, this paste can drool or be inadvertently applied to a place on the body not provided for by unskilled hands. Furthermore, once applied to the body, this paste can also stain clothing.

Document US 5,836, 998 proposes an adhesive stencil on which a henna-based preparation is deposited to produce temporary drawings and to facilitate the decoration on the skin. This preparation is applied for 3 to 4 hours. If this method makes it possible to avoid the unsightly effects due to the inexperience of the user, it obliges the latter to take precautions, throughout the time of the application (several hours) so that the preparation based on henna n '' does not come into contact with, and thus does not stain, supports such as clothing or other parts of the body. This method is therefore very restrictive.

There therefore remains the need for a system making it possible to decorate the skin in a semi-permanent manner which does not have the disadvantages of the prior art.

On the other hand the French patent application FR-A-2,792. 192 describes a device of the adhesive patch type for makeup intended to be applied to the skin, then to be removed when makeup is no longer desired. Such a device comprises a detachable protective sheet or film, a reversible pressure-sensitive adhesive layer, which can contain a make-up material, at least one layer chosen from a layer linked to the adhesive layer and which can contain a make-up material, and an outer protective layer. It is therefore the makeup device which is the vehicle for the decorative pattern (colored or not), said pattern being visible in relief, and more or less blurred depending on the location, the nature and the thickness of the layer in which it is inserted make-up material.

However, the decoration thus obtained is not intended to last semi-permanently, the device wearing out during the day and cannot be reasonably worn for more than a day. In addition, the wearing of such a device can be essential for some people by the unpleasant feeling which can result therefrom, and the images are dependent on the support on which they are fixed, giving an artificial character to the makeup. Finally, this device does not lead to a color transfer on the skin; it is therefore not a device for coloring the skin.

Similarly, it is known from document US 5, 120, 325 to color, in particular a shade close to the natural color of the skin, sterile bandages intended for wounds, with the aim of making them more discreet. But it is quite clear that no color transfer is carried out on the skin.

It has now been discovered that the application of skin coloring agents and their effects can be better controlled, when applied as a composite transfer system, rather than as a cream or paste, for example.

The subject of the present invention is therefore a system for transferring a colored pattern onto the skin comprising: - i) a support layer 1,

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- ii ) une matrice hydrogel 2 comprenant au moins un agent de coloration de la peau et au moins un gélifiant hydrophile, la couche support 1 étant imperméable à l'agent de coloration de la peau.

ii) a hydrogel matrix 2 comprising at least one coloring agent for the skin and at least one hydrophilic gelling agent, the support layer 1 being impermeable to the coloring agent for the skin.

Preferably, the hydrogel matrix is a means of at least partial transfer of the coloring agent. According to a preferred embodiment of the invention, the coloring agent is present in the hydrogel matrix at least on part of the hydrogel matrix intended to be brought into contact with the skin.

The system according to the invention makes it possible to create decorative patterns on the skin in a safe, simple, comfortable and inexpensive manner. Indeed, the use of this system does not involve external tools, so it is safe and painless. In addition, the predrawn shapes avoid unsightly effects and misfires (smearing, etc.) which may be due to the inexperience of the user. The pattern obtained is homogeneous. In addition, the makeup thus obtained by coloring is not in relief because it leads to a transfer of color from the system to the skin. This allows the user to keep his freedom of movement under reasonable conditions of use, without fear of damaging the makeup by contact with clothing or any other material coming into contact with the skin thus made up.

The use of the transfer system according to the invention is extremely easy: it suffices to apply the system to the point of the body where it is desired to create a pattern for the desired time for the desired intensity and then to remove the system. . A decorative pattern is then obtained which will remain on the skin, under normal conditions of use, generally at least six hours, for example from more than six hours to a few weeks. The decorative pattern will be eliminated over time by successive washing and / or peeling. We can therefore speak of semi-permanent coloring.

The composition comprising the dye being protected by an impermeable membrane, it does not risk staining clothing or another part of the body. The user is free to move during the entire time of the application. The duration of the application and therefore the intensity of the resulting coloration can be controlled at will. In addition, the dyes are not subjected to air oxidation or degradation by UV radiation, they are stable and are more effective.

et faciliter le contact avec, et le transfert sur, la peau et éviter les taches sur les vêtements ; un deuxième élément est la matrice hydrogel fixée sur la couche support et comprenant au moins un gélifiant hydrophile et l'agent de coloration de la peau, cette matrice pouvant venir directement au contact de la peau ; le système peut éventuellement comprendre d'autres couches adhésives ou non comme par exemple, une couche pelable de protection, recouvrant de façon hermétique la matrice, de façon à la protéger de toute contamination extérieure pendant le temps de stockage préalable à l'utilisation du système, ou encore une The transfer system of the present invention has a composite structure made up of at least two elements: a first element is the support layer, occlusive, that is to say made of a material impermeable to the coloring agent of the skin to prevent it from evaporating

and facilitate contact with, and transfer to, the skin and avoid stains on clothing; a second element is the hydrogel matrix fixed to the support layer and comprising at least one hydrophilic gelling agent and the coloring agent for the skin, this matrix possibly coming directly into contact with the skin; the system can possibly comprise other adhesive layers or not such as for example, a peelable protective layer, hermetically covering the matrix, so as to protect it from any external contamination during the storage time prior to use of the system , or even a

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 adhesive layer used to ensure the adhesion of the patch to the skin, or a stencil layer.

Other characteristics, aspects and advantages of the present invention will appear on reading the detailed description which follows.

pour la réalisation de la couche support, on peut citer les polyéthylènes haute ou basse densité, les polypropylènes, les polychlorures de vinyle, les polyoléfines, les polyamides, les polystyrènes, les polytetrafluoroéthylènes, les cellophanes, les acétates de cellulose, les polyesters tel que le polyphtalate d'éthylène, les copolymères éthylène-acétate de vinyle et de polyuréthane, les films en latex, fabriqués par exemple à partir de dispersions aqueuses de particules de polyester-polyuréthane ou de polyéther-polyuréthane et d'au moins un agent plastifiant, et/ou les complexes de ces matériaux et/ou analogues. Ces matériaux peuvent également être présents sous forme stratifiée avec au moins une feuille de métal telle qu'une feuille d'aluminium par exemple. The support layer of the system according to the invention must be occlusive, that is to say made of a material impermeable to the coloring agent of the skin, so as to prevent the evaporation of the latter and to facilitate its contact with the surface of the skin. Advantageously, the use of a color pattern transfer system according to the invention comprising such an occlusive layer means that the increase in color on the skin is favored under the occlusive conditions of application of said system, leading to coloring. semi-permanent skin according to the invention. Such an occlusive support layer also preferably preserves the coloring agent of the skin from air oxidation. It comprises a film structure which may consist of, or comprise, a woven or non-woven, natural or synthetic fibrous material; among suitable materials

for the production of the support layer, mention may be made of high or low density polyethylenes, polypropylenes, polyvinyl chlorides, polyolefins, polyamides, polystyrenes, polytetrafluoroethylenes, cellophanes, cellulose acetates, polyesters such as polyethylene phthalate, ethylene-vinyl acetate and polyurethane copolymers, latex films, produced for example from aqueous dispersions of polyester-polyurethane or polyether-polyurethane particles and at least one plasticizing agent, and / or the complexes of these materials and / or the like. These materials can also be present in laminated form with at least one metal sheet such as an aluminum sheet for example.

adhésive ou recevoir des moyens adhésifs disposés à la périphérie de la matrice, et contribuer ainsi à l'adhésion du système de transfert sur la peau. The support layer not only has the function of supporting the hydrogel matrix, but also of serving as a protective coating of the latter. It can be of the same dimension as the hydrogel matrix or extend beyond the latter and towards the outside: in the latter case, it can itself be

adhesive or receive adhesive means disposed at the periphery of the matrix, and thus contribute to the adhesion of the transfer system on the skin.

In an advantageous embodiment of the invention, the support layer is adhesive and extends beyond the periphery of the hydrogel matrix. The support layer may for example be made of adhesive nonwoven.

In an advantageous embodiment of the invention, the support layer is opaque and comprises UV filters in order to protect the coloring agent from UV radiation. It can for example comprise one or more filters chosen from derivatives of dibenzoylmethane, benzophenone, triazines, cinnamates and / or mixtures thereof.

The support layer can also include a perfume: a perfumed transfer system is then obtained.

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 The support layer may be of any suitable thickness to provide the desired support and protection functions. For example, it can have a thickness ranging from 0.02 mm to 1.5 mm approximately.

Advantageously, the support layer is sufficiently flexible so as to be able to perfectly match the profile of the skin and not to cause the user a feeling of discomfort.

The hydrogel matrix is fixed to the support layer and comprises at least one hydrophilic gelling agent and the coloring agent. The fixing method is a conventional coating method well known to those skilled in the art, comprising deposition using at least one roller, and evaporation, by heat or infrared, if necessary.

d'algue comme !'agar-agar, le gellane, les polysaccharides possédant une chaîne latérale et 6 sucres neutres tels que décrits dans le document FR-A-2759377, les agents gélifiants d'origine animale comme les dérivés de protéine, en particulier la gélatine, de boeuf ou de poisson, les caséïnates, les polymères associatifs, les argiles, et/ou leurs mélanges.

Among the hydrophilic gelling agents, mention may be made generally of anionic water-soluble polymers at neutral pH, cationic water-soluble polymers at neutral pH, polymers or copolymers of acrylic acid or acrylate derivatives, cellulose derivatives, polysacharrides such as extracts

algae such as agar-agar, gellan, polysaccharides having a side chain and 6 neutral sugars as described in document FR-A-2759377, gelling agents of animal origin such as protein derivatives, in particular gelatin, beef or fish, caseinates, associative polymers, clays, and / or mixtures thereof.

In a preferred embodiment of the invention, the hydrophilic gelling agent is chosen from anionic water-soluble polymers at neutral pH, cationic water-soluble polymers at neutral pH and their mixtures.

d'hydroxypropylméthylcellulose, la carboxyméthyléthylcellulose, l'éthyl carboxyéthylcellulose, l'acétate succinate de cellulose, le succinate de méthyl cellulose, le succinate phtalate de méthyl cellulose, le succinate d'éthyl cellulose, t'amidon modifié carboxyméthyl de sodium, l'acétate phtalate d'amidon, le galactomannane modifié ester de l'acide phosphorique (vendu sous la

dénomination commerciale Meyprofilm par Meyhall), la carboxyméthyl guar (vendue sous la dénomination commerciale Meyprogum"par Meyhall), la carboxyméthyl hydroxypropyl guar (vendue sous la dénomination commerciale Jaguar CMHP"par Meyhall), les pectines, les carraghénanes (iota, kappa, lambda), les alginates, le xanthane, les copolymères à base d'acide acrylique et de méthylesters d'acide méthacrylique (vendus sous la dénomination commerciale Eudragit US par Rôhm-Pharma), les copolymères à base d'acide acrylique, d'esters d'acide acrylique et d'esters méthacryliques ayant des radicaux carboxy libres (vendus sous la dénomination Aquakeep"par Itoh ou Carboset"par Goodrich) et/ou leurs mélanges. Among the anionic water-soluble polymers at neutral pH, there may be more particularly mentioned the anionic derivatives of cellulose, the anionic derivatives of starch, the anionic derivatives of galactomannan, the anionic plant polysaccharides, the anionic polyacrylate and polymethacrylates, and / or their mixtures: more particularly, sodium carboxymethylcellulose, cellulose acetate phthalate, phthalate may be mentioned

hydroxypropylmethylcellulose, carboxymethylethylcellulose, ethyl carboxyethylcellulose, cellulose acetate succinate, methyl cellulose succinate, methyl cellulose phthalate succinate, ethyl cellulose succinate, sodium carboxymethyl modified starch, acetate starch phthalate, the modified galactomannan ester of phosphoric acid (sold under the

trade name Meyprofilm by Meyhall), carboxymethyl guar (sold under the trade name Meyprogum "by Meyhall), carboxymethyl hydroxypropyl guar (sold under the trade name Jaguar CMHP" by Meyhall), pectins, carrageenans (iota, kappa, lambda ), alginates, xanthan, copolymers based on acrylic acid and methyl esters of methacrylic acid (sold under the trade name Eudragit US by Rôhm-Pharma), copolymers based on acrylic acid, esters of d acrylic acid and methacrylic esters having free carboxy radicals (sold under the name Aquakeep "by Itoh or Carboset" by Goodrich) and / or mixtures thereof.

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Among the cationic water-soluble polymers at neutral pH, mention may more particularly be made of gelatin type A, cationic galactomannan derivatives, cationic polyacrylates and polymethacrylates, and mixtures thereof: more particularly, hydroxypropyl trimonium guar chloride ( sold under the name Jaguar C by Meyhall), the copolymers of dimethylaminoethyl methacrylate and neutral methacrylic acid (sold under the trade name Eudragit E by Röhm-Pharma), the copolymers of esters of acrylic and methacrylic acids having a low proportion of quaternary ammonium groups (sold under the trade name Eudragit RURS by Röhm-Pharma) and their mixtures.

Preferably, the hydrophilic gelling agent of the system according to the invention comprises at least one anionic water-soluble polymer at neutral pH and at least one cationic water-soluble polymer at neutral pH. Preferably, the hydrophilic gelling agent comprises the combination of carboxymethylcellulose and type A gelatin.

Preferably, the hydrophilic gelling agent is present in the hydrogel matrix at a content which can range up to 60%, by weight, more preferably ranging from 0.1 to 30%, by weight, relative to the total weight of the matrix.

Preferably, the anionic water-soluble polymer at neutral pH is present in the hydrogel matrix at a content ranging from 0.5 to 30% by weight, relative to the total weight of the matrix.

Preferably, the cationic water-soluble polymer at neutral pH is present in the hydrogel matrix at a content ranging from 0.5 to 50% by weight, relative to the total weight of the matrix.

In an advantageous form of the invention, the hydrogel matrix further comprises a crosslinking agent which can help ensure adhesion of the hydrogel matrix to the skin. The crosslinking agent can be chosen from multivalent metal cations and multivalent acid anions. Mention may more particularly be made of the cations of zinc, magnesium, aluminum, calcium, chromium, copper, iron and the anions sulfate, phosphate, silicate, borate, tartrate and citrate.

Such hydrogel matrices and their preparation process are described for example in US patent 5,456,745.

agents colorants dans le stratum corneum. Par coloration durable, on entend une coloration qui résiste à la fois au frottement et à plusieurs lavages par une solution contenant des tensioactifs. Une telle coloration durable se distingue donc de la coloration superficielle et momentanée apportée par exemple par un produit de maquillage à base de pigments. According to the present invention, the term “skin coloring agent” is intended to mean a compound having a particular affinity for the skin enabling it to confer on the latter a lasting artificial coloring optionally by reacting with the amino acids of the skin or by accumulation eVou dissemination of

coloring agents in the stratum corneum. By lasting coloring is meant a coloring which resists both rubbing and being washed several times with a solution containing surfactants. Such a lasting coloration is therefore distinguished from the surface and momentary coloration provided for example by a makeup product based on pigments.

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Such coloring has the advantage of not rubbing off and of not transferring onto supports with which the skin can be brought into contact such as clothing, other parts of the body, etc.

Thus, the coloring agents which can be used according to the present invention are chosen from dyes, of vegetable or synthetic origin, water-soluble or water-dispersible, lacquers which result from the fixing of a vegetable or synthetic dye on an inorganic support or on a polymer , direct dyes, fluorescent dyes, photochromes or thermochromes.

Tausch, l'Areca Catechu L, l'Arrabidaea Chica E. et B., la Bixa Orellana L (rocou), la Butea Monosperma Lam, la Caesalpina Echinata Lam, la Caesalpina Sappan L., la Calophyllum Inophyllum L., la Carthamus Tinctorius L, la Cassia Alata L., la Chrozophora Tinctoria L., La Crocus Sativus L., la Curcuma Longa L., la Diospyros Gilletii de Wild, l'Eclipta Prostrata L., la Gardenia Erubescens Stapf. et Hutch., la Gardenia Terniflora Schum. et Thonn., la Genipa Americana L., la Genipa Brasiliensis L., la Guibourtia Demeusei (Harms) J. Leon, l'Haematoxylon Campechianum L., l'Helianthus annuus, l'Humiria Balsamifera (abt.) St-Hil., l'Isatis Tinctoria L., le Mercurialis perenis, le Monascus purpureus, le Monascus ruber, le Monascus pilosus, la Morus Nigra L., la Picramnia Spruceana, la Pterocarpus Erinaceus Poir., la Pterocarpus Soyauxii Taub., la Rocella Tinctoria L., la Rothmannia Whitfieldii (Und/.) Dand., la Schlegelia Violacea (abt.) Griseb., la Simira Tinctoria Aublet, la Stereospermum Kunthianum Cham., la Symphonia Globulifera L., la Terminalia Catappa L., la Sorgho, l'Aronia melanocarpa, les naphtoquinone dont la lawsone, issue de la Lawsonia Inermis L. encore appelée henné ou de Dmpatiens Balsamina, les extraits de bois rouge tels que décrits dans le document W098/44902, le jus de betterave, les anthocyanes comme les extraits de fruits rouges, la dihydroxyacétone, les dérivés mono ou polycarbonylés

tels que l'isatine, l'alloxane, la ninhydrine, le glycéraldéhyde, l'aldéhyde mésotartrique, les dérivés de pyrazoline-4, 5-dione, et leurs mélanges, ces agents de coloration de la peau pouvant être associés ou non à des colorants directs ou des dérivés indoliques, eVou leurs mélanges. Among the water-soluble dyes, mention may be made of extracts of dye plants, such as, for example, Aleurites Moluccana Wilid, Alkanna Tinctoria

Tausch, Areca Catechu L, Arrabidaea Chica E. and B., Bixa Orellana L (annatto), Butea Monosperma Lam, Caesalpina Echinata Lam, Caesalpina Sappan L., Calophyllum Inophyllum L., Carthamus Tinctorius L, Cassia Alata L., Chrozophora Tinctoria L., Crocus Sativus L., Curcuma Longa L., Diospyros Gilletii de Wild, Eclipta Prostrata L., Gardenia Erubescens Stapf. and Hutch., Gardenia Terniflora Schum. and Thonn., Genipa Americana L., Genipa Brasiliensis L., Guibourtia Demeusei (Harms) J. Leon, Haematoxylon Campechianum L., Helianthus annuus, Humiria Balsamifera (abt.) St-Hil. , Isatis Tinctoria L., Mercurialis perenis, Monascus purpureus, Monascus ruber, Monascus pilosus, Morus Nigra L., Picramnia Spruceana, Pterocarpus Erinaceus Poir., Pterocarpus Soyauxii Taub., Rocella Tinctoria L ., Rothmannia Whitfieldii (Und /.) Dand., Schlegelia Violacea (abt.) Griseb., Simira Tinctoria Aublet, Stereospermum Kunthianum Cham., Symphonia Globulifera L., Terminalia Catappa L., Sorghum, l 'Aronia melanocarpa, naphthoquinone including lawsone, from Lawsonia Inermis L. also called henna or Dmpatiens Balsamina, red wood extracts as described in document W098 / 44902, beet juice, anthocyanins such as extracts of red fruits, dihydroxyacetone, mono or polycarbonyl derivatives

such as isatin, alloxane, ninhydrin, glyceraldehyde, mesotartaric aldehyde, pyrazoline-4, 5-dione derivatives, and mixtures thereof, these skin coloring agents may or may not be associated with direct dyes or indole derivatives, or mixtures thereof.

These extracts of dye plants can be in the form of lyophilisate, paste, or even a solution: generally, the leaves of the dye plant are ground to obtain a powder. This powder is dissolved in an aqueous phase for a few hours. The mixture is then centrifuged and then filtered. The filtrate obtained is frozen and then lyophilized.

comme le Iycopène, le béta-carotène, la bixine, la capsantéine, eVou leurs mélanges. Among the water-dispersible dyes, mention may be made of Sudan Red III (name CTFA D & C red 17), lutein, quinizarin green (name CTFA DC green 6), Alizurol SS purple (name CTFA DC violet N 2 ), carotenoid derivatives

such as Iycopene, beta-carotene, bixin, capsantein, and their mixtures.

Among the synthetic dyes, mention may be made of dye complexes, for example those produced by complexing conventional synthetic dyes with lysine palmitate-myristate and dipropylene glycol:

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peut ainsi citer le complexe éosine (10%)/palmitate-myristate de Iysine/dipropylène glycol vendu sous la dénomination commerciale MMB red 21/1 OR par la société Phytocos.

may thus cite the eosin (10%) / Iysine palmitate-myristate / dipropylene glycol complex sold under the trade name MMB red 21/1 OR by the company Phytocos.

Examples of lacquers that may be mentioned include aluminum lacquers, curcumin lacquers, in particular the product marketed under the trade name Eurovit curcumin lake by the company Warner Jenkinson, phloxine B lacquer coated with phosphate. of perfluoropolymethylisopropyl ether ethoxyle sold under the trade name D & C Red # 27 AI lake by the company Cardre, the tartrazine lacquer coated with polydimethylsiloxane sold under the trade name Chroma wrap yellow 5 aluminum luke by the company Enhance Technologies; calcium lakes, such as burgundy red B in a mixture of acrylate / water copolymers sold under the trade name Rubis Covacryl WNL 4723, or red Lithol B coated with polydimethylsiloxane sold under the trade name Chroma wrap red 7 calcium lade by Enhance Technologies, zirconium, barium, barium-strontium lakes are mixtures thereof.

Mention may also be made of direct dyes such as benzene nitro dyes, nitrophenylenediamines, nitrodiphenylamines, nitroanilines, nitro phenol ethers or nitrophenols, nitropyridines, anthraquinone dyes, mono- or di-azo dyes, triarylmethane dyes, , acridinics and xanthenics, or metalliferous dyes.

The coloring agent can also be heated prior to its incorporation into the matrix of the system according to the invention in order to modify its color. Thus, it is possible to heat the naphthoquinones up to 90 C in order to make its color darker.

Preferably, the skin coloring agent is present in the hydrogel matrix according to the present invention in proportions sufficient to give the skin, after application, a coloring. t is thus generally present in proportions of between 0.5 and 50% by weight of active material relative to the total weight of the matrix, and preferably of between 10 and 35% by weight of active material relative to the total weight of the matrix.

In a preferred embodiment of the invention, the skin coloring agent is chosen from water-soluble dyes. In a more preferred form, the skin coloring agent is henna.

The hydrogel matrix of the present invention can also comprise any additional water-soluble or water-dispersible compound such as thickeners, tackifying compounds (ie which allow adhesion), adhesive polymers, preservatives, stabilizers, fillers and mixtures thereof. .

naturelles telles que le mastic, le damar, l'elemi, le styrax, l'euphorbium, la sandarac, le galbanum, la gomme arabique, la gomme de karaya, les résines The tackifying compounds can be chosen from resins or gums

natural such as mastic, damar, elemi, styrax, euphorbium, sandarac, galbanum, gum arabic, karaya gum, resins

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naturelles modifiées comme les dérivés de colophane, les résines et les gommes synthétiques comme les polyacrylates, les polyméthacrylates, les éthers polyvinyliques, les polyuréthanes, les polyisobutylènes, les esters polyvinyliques, les silicones et/ou leurs mélanges.

modified natural compounds such as rosin derivatives, resins and synthetic gums such as polyacrylates, polymethacrylates, polyvinyl ethers, polyurethanes, polyisobutylenes, polyvinyl esters, silicones and / or mixtures thereof.

The presence of tackifying compounds in the hydrogel matrix allows the latter to be fixed on the support layer.

The adhesive polymers can be chosen from acrylic adhesive polymers, silicone adhesive polymers, polyisobutylenes and / or mixtures thereof. They can help the adhesion to the skin of the transfer system according to the invention. The matrix according to the invention can also comprise a film-forming polymer in the form of particles in aqueous dispersion, generally known under the name of latex or pseudolatex. In the present application, the term "film-forming polymer" means a polymer capable of forming on its own or in the presence of an auxiliary film-forming agent, an isolable film.

Among the film-forming polymers which can be used in the gel of the present invention, mention may be made of synthetic polymers, of radical type or of polycondensate type, polymers of natural origin, and their mixtures.

As commercial products which can be used according to the present invention, mention may be made of the acrylate copolymer sold under the trade name Néocryl BT-24 by the company Zeneca, the mixture of polyvinylpyrrolidone / polyurethane (1/1) in water at 15% sold under the trade name Aquamere H-1511 by the company HYDROMER INC., the acrylic copolymer in aqueous dispersion at 60% sold under the trade name Neocryl A-523 by the company ZENECA RESINS.

The hydrogel matrix according to the invention can also comprise at least one antioxidant agent in order to stabilize the coloring agent such as for example phytic acid; it can also comprise at least one sequestering agent such as sodium diethylenetriamine pentamethylenephosphonate sold under the trade name Dequest by the Company Monsanto.

The matrix according to the invention can also comprise agents which modify the shade of the color: among these color modifying agents, mention may be made of lactic acid and egg protein (ovomucin) which darken the color. These agents can be present in the matrix at a concentration of up to 5% by weight, relative to the weight of the matrix.

The matrix according to the invention may also contain one or more sunscreens active in UVA and / or UVB (absorbers), hydrophilic or lipophilic, or even metallic oxide pigments coated or not.

The hydrogel matrix of the present invention may also comprise conventional cosmetic adjuvants in particular chosen from organic solvents such as alcohols, glycols, lower polyols,

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 ionic or non-ionic thickeners, softeners, anti-free radical agents, opacifiers, stabilizers, emollients, silicones, α-hydroxy acids, anti-foaming agents, hydrating agents, vitamins, perfumes, preservatives , surfactants, fillers, polymers, propellants, basifying or acidifying agents, repellants or any other ingredient usually used in the cosmetic or dermatological field.

Obviously, a person skilled in the art will take care to choose the optional compound (s) mentioned above and their amounts so that the coloring properties of the coloring agent used are not, or not substantially, altered by the planned addition (s).

To produce the hydrogel matrix of the invention, a solution, an emulsion or a suspension of the hydrophilic gelling agent, in particular of the anionic water-soluble polymer at neutral pH and of the cationic polymer at neutral pH, is produced in a mixture of water and solvent. volatile. Then we pour everything in a mold or we put everything on a support and dry in the conventional way. After evaporation of the volatile solvent, a film is obtained.

The transfer system according to the invention can optionally further comprise at least one other layer, adhesive or not: this layer can for example be a regulatory membrane, it can optionally include one or more cosmetic active agents, it can be a predesigned layer paper or material impermeable to the coloring agent and serving as a stencil. Depending on its function, this layer can be arranged either between the hydrogel matrix and the support layer or over the hydrogel matrix.

In an advantageous embodiment of the invention, the system further comprises a peelable protective layer covering the hydrogel matrix.

In another embodiment of the invention, the system also includes a stencil layer.

When the transfer system is protected by a peelable protective layer, this is removed at the time of use. It can be made of any material impermeable to the coloring agent of the skin as well as to any other component present in the hydrogel matrix. Among the materials that can be used, there may be mentioned preferably a sheet of silicone paper or a sheet of thermoplastic material treated to make it non-stick, for example using a varnish. Preferably, this peelable protective layer is made of polyethylene.

In the case where the system according to the invention comprises a peelable protective layer, the hydrogel matrix comprising the coloring agent being protected within the system both by the support layer and by the peelable protective layer, the system can be easily transported, for example in a bag, and can be used for travel, for example. t is therefore extremely practical, quick and easy to use.

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The transfer system according to the invention can have any desired shape and any dimension, corresponding to the intended use; it can be adapted to the skin surface intended to receive makeup. Its adhesion to the skin is of course reversible. Preferably, it represents a decorative motif which it is desired to transfer to the skin and keep for a period which can vary from several hours to several weeks. The transfer system according to the invention can comprise an integrated stencil layer, covering the hydrogel matrix, or separated, and to be applied to the skin before applying the system: in this case, the system can have any shape, the design on the skin being produced by the stencil. In another variant, the transfer system can itself represent a decorative motif.

It is also possible to produce systems according to the invention in several colors using different coloring agents, distributed in different places of the matrix, possibly in different layers or reservoirs. A decorative pattern in several colors is thus obtained on the skin.

FIG. 1 illustrates an embodiment of the invention in which the transfer system comprises a support layer 1, a hydrogel matrix 2 comprising the coloring agent and the hydrophilic gelling agent. The system also includes a peelable protective layer 3.

FIG. 2 illustrates an embodiment of the invention in which the support layer 1 is adhesive and extends beyond the periphery of the hydrogel matrix 2.

FIG. 3 illustrates the case of a transfer system according to the invention further comprising a regulating membrane 6 and a stencil layer 7. In this figure, the support layer 1 is adhesive and extends beyond the periphery of the hydrogel matrix 2 and the periphery of the regulating layers 6 and stencil 7. The system also includes a protective film layer 3.

FIG. 4 illustrates a separate stencil which can be used with any system according to the invention, by applying it between the skin and said system.

20) on retire ensuite le système de transfert de la peau. The subject of the present invention is also a process for semi-permanent coloring of the skin comprising the following steps: 10) a transfer system as defined above is applied to the skin for a sufficient period of time,

20) the transfer system is then removed from the skin.

The transfer system according to the invention can be used, after removal of the peelable protective layer if necessary, on the surface of the skin which it is desired to decorate, by applying the system directly to said surface.

The duration of application can vary as a function of the coloring agent used, as a function of the concentration of said coloring agent within the hydrogel matrix and as a function of the intensity of the color desired in the end on the skin. Indeed, the total or partial transfer of the coloring agent from the hydrogel matrix

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 in the stratum corneum of the skin will depend on the time of application to the latter of the system. By sufficient duration is meant, within the meaning of the present invention, a duration necessary for the coloring agent to develop its color on the skin. Generally, this duration can range from 2 minutes to 12 hours.

The system can thus be applied overnight without fear of staining clothing or other parts of the body due to the protective function of the support layer. The system is then simply peeled off from the skin and a semi-permanent decorative pattern is obtained on the skin, obtained by transfer of the coloring agent of the hydrogel matrix into the stratum corneum of the skin, this pattern possibly remaining on the layer. superficial skin up to several weeks.

Concrete, but in no way limiting, examples illustrating the invention will now be given.

EXAMPLE 1 with Ivophilisate (or Powder) of Henna A color pattern transfer system according to the invention is prepared, as shown in FIG. 1 except that there is no peelable protective layer 1. The support layer 3 consists of a 2 cm × 2 cm layer of nonwoven polyamide 1 mm thick. The hydrogel layer 2 is produced in the following manner: A hydrogel formulation is produced as described in Example 7 of US-A-5,456. 745. It includes 10 g of Eudragit E 100 (R), 10 g of Carboset 525 @, 5 g of glycerol, 3 g of PVA Powiol 10-98 @, 2 g of PVP Kollidon 90 <S), 0.55 g of preservative and 66.95 g of water.

Then, without premixing, the coloring agent, which is henna lyophilisate (or powder), is dissolved in said hydrogel formulation. The coloring agent is thus added up to 20% by weight in the hydrogel matrix.

There is thus obtained, by application of the hydrogel layer on the support layer, by a conventional coating process, a color pattern transfer system according to the invention.

plus longue. The application is made to the skin (forearm of a person), the application times varying from 20 min to 12 hours. Thus, after removal of the transfer system, a colored marking on the skin of an orange-brown tone is obtained, the intensity of the color being all the stronger as the duration of application is

longer.

EXAMPLE 2 with MMB Red 33/3 dye from PHYTOCOS The procedure is the same as in Example 1, except that the coloring agent here is the dye referenced MMB Red 33/3 from PHYTOCOS knowledge.

We obtain We thus obtain, after removal of the transfer system, a

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 colored marking on the skin of your fuchsia, the intensity of the color being stronger the longer the duration of application.

Claims (32)

 1. Color pattern transfer system on the skin, characterized in that it comprises: - in) a support layer 1, - in ") a hydrogel matrix 2 comprising at least one coloring agent for the skin and at least one gelling agent hydrophilic, the support layer 1 being impermeable to the coloring agent of the skin. 2. System according to claim 1, such that the hydrogel matrix is a means of at least partial transfer of the coloring agent. 3. System according to claim 2 such that the coloring agent is present in the hydrogel matrix at least on a part of the hydrogel matrix intended to be brought into contact with the skin. 4. System according to any one of the preceding claims, such that the support layer 1 comprises a film structure constituted by, or comprising, a woven or non-woven, natural or synthetic fibrous material. 5. System according to any one of the preceding claims, such that the material is chosen from high or low density polyethylene,

 polypropylenes, polyvinyl chlorides, polyolefins, polyamides, polystyrenes, polytetrafluoroethylenes, cellophanes, cellulose acetates, polyesters, ethylene-vinyl acetate and polyurethane copolymers, latexes or complexes of these materials eVou like. 6. System according to any one of the preceding claims, such that the support layer is adhesive and extends beyond the periphery of the hydrogel matrix. 7. System according to any one of the preceding claims, such that the support layer comprises at least one UV filter. 8. System according to any one of the preceding claims, such that the support layer has a thickness ranging from 0.02 mm to 1.5 mm approximately. 9. System according to any one of the preceding claims, such that the hydrophilic gelling agent is chosen from anionic water-soluble polymers at neutral pH, cationic water-soluble polymers at neutral pH and their mixtures. 10. System according to the preceding claim such that the anionic water-soluble polymers at neutral pH are chosen from anionic derivatives of cellulose, anionic derivatives of starch, anionic derivatives of galactomannan, anionic plant polysaccharides, polyacrylates and anionic polymethacrylates. , eVou their mixtures. 11. System according to the preceding claim such that the anionic water-soluble polymers at neutral pH are chosen from sodium carboxymethylcellulose, cellulose acetate phthalate, phthalate <Desc / Clms Page number 15>  hydroxypropylmethylcellulose, carboxymethylethylcellulose, ethyl carboxyethylcellulose, cellulose acetate succinate, methyl cellulose succinate, methyl cellulose phthalate succinate, ethyl cellulose succinate, modified sodium carboxymethyl starch, acetate starch phthalate, the modified galactomannan ester of phosphoric acid, carboxymethyl guar, carboxymethyl hydroxypropyl guar, pectins, carrageenans, alginates, xanthan, copolymers based on acrylic acid and acid methyl esters methacrylic, copolymers based on acrylic acid, acrylic acid esters and methacrylic esters having free carboxy radicals, and their mixtures.

12. The system of claim 9 such that the cationic water-soluble polymers at neutral pH are chosen from gelatin type A, cationic galactomannan derivatives, cationic polyacrylates and polymethacrylates, and mixtures thereof. 13. System according to any one of claims 9 to 12 such that the hydrophilic gelling agent comprises at least one anionic water-soluble polymer at neutral pH and at least one cationic water-soluble polymer at neutral pH.

14. System according to the preceding claim such that the anionic water-soluble polymer at neutral pH is present in the hydrogel matrix at a content ranging from 0.5 to 30% by weight, relative to the total weight of the matrix. 15. The system of claim 13 such that the cationic water-soluble polymer at neutral pH is present in the hydrogel matrix at a content ranging from 0.5 to 50% by weight, relative to the total weight of the matrix. 16. System according to any one of claims 13 to 15 such that the hydrophilic gelling agent comprises the combination of carboxymethylcellulose and type A gelatin. 17. System according to any one of the preceding claims, such that the hydrophilic gelling agent is present in the hydrogel matrix at a content which can range up to 60% by weight, more preferably ranging from 0.1 to 30% by weight, per relative to the total weight of the matrix. 18. System according to any one of the preceding claims, such that the hydrogel matrix further comprises a crosslinking agent. 19. System according to any one of the preceding claims, such that the coloring agent for the skin is chosen from dyes, of vegetable or synthetic origin, water-soluble or water-dispersible, lacquers, direct dyes, fluorescent dyes, photochromes or thermochromes and / or their mixtures. 20. System according to any one of the preceding claims, such that the skin coloring agent is present in the hydrogel matrix according to the present invention in proportions ranging from 0.5 to 50% by weight of active material relative to the total weight of the hydrogel matrix, and preferably ranging from <Desc / Clms Page number 16>  10 to 35% by weight of active material relative to the total weight of the hydrogel matrix. 21. System according to any one of the preceding claims, such that the skin coloring agent is chosen from water-soluble dyes. 22. System according to the preceding claim, such that the agent for coloring the skin is henna. 23. System according to any one of the preceding claims, such that the hydrogel matrix comprises at least one antioxidant agent. 24. System according to any one of the preceding claims, such that the hydrogel matrix comprises at least one sequestering agent. 25. System according to any one of the preceding claims, such that the hydrogel matrix comprises at least one color-modifying agent chosen from lactic acid and egg protein. 26. System according to any one of the preceding claims, such that the hydrogel matrix comprises at least one or more sunscreens active in UVA and / or UVB, hydrophilic or lipophilic, or also pigments of coated metal oxides or no. 27. System according to any one of the preceding claims, such that the hydrogel matrix also comprises conventional cosmetic adjuvants.

 in particular chosen from organic solvents such as alcohols, glycols, lower polyols, ionic or nonionic thickeners, softeners, anti-free radical agents, opacifiers, stabilizers, emollients, silicones, α-hydroxy acids, anti-foaming agents, moisturizing agents, vitamins, perfumes, preservatives, surfactants, fillers, polymers, propellants, basifying or acidifying agents, repellants or any other ingredient usually used in the cosmetic field and / or dermatological and their mixtures. 28. System according to any one of the preceding claims, as comprising at least one other layer, adhesive or not. 29. The system of claim 28 such that it further comprises a peelable protective layer covering the hydrogel matrix. 30. System according to any one of the preceding claims, such that it further comprises a stencil layer. 31. A method of semi-permanent coloring of the skin comprising the following steps: 1) a transfer system as defined in any one of claims 1 to 30 is applied to the skin for a sufficient period of time, 20) then removed the skin transfer system. <Desc / Clms Page number 17>  32. Method according to the preceding claim such that the duration ranges from 2 minutes to 12 hours.