FR2954141A1 - Cosmetic treatment of skin comprises applying compound, preferably gamma-aminopropyl triethoxysilane adapted to in situ condensation and compound, preferably dihydroxyacetone comprising reactive function to form a covalent bond, on skin - Google Patents

Abstract

Method of cosmetic treatment of skin comprises applying a compound or group of compounds A adapted to in situ condensation and has at least one reactive function FA, which is free after condensation, and a compound C of cosmetic interest comprising a reactive function Fc susceptible to form a covalent bond by reaction with function FA, on skin, where the material resulting from the condensation of A is soluble in water and the reaction of the compound C of the material resulting from the condensation of A leads to a decrease in the solubility of the material in water. An independent claim is included for a cosmetic kit comprising at least a first composition comprising at least one compound or group of compound A and a second composition comprising at least one compound C, in a medium.

Description

The present invention relates to a cosmetic skin treatment process involving a compound, or set of compounds, capable of condensing in situ, the material resulting from the condensation being rendered insoluble in water by application of a compound of cosmetic interest. .

In cosmetics, particular properties (for example optical, mechanical, and / or tactile) are conferred on the skin. However, one of the major problems in cosmetics is to confer these particular properties quickly and sustainably. Those skilled in the art may especially be confronted with the following problems: it is possible to deposit on the surface of the skin ingredients which modify the appearance of the skin immediately (pigments, dyes) but which do not having no or little affinity with the skin, are not stubborn and go to the first wash. it is alternatively possible to deposit on the skin products that will react with the constituents of the skin to modify it. In this case, the property conferred is stubborn and gradually disappears by the natural phenomenon of desquamation, but, in return, the deposited ingredient must diffuse into the different compartments of the skin to finally reach the reactive sites (proteins, skin lipids) and the appearance of the property is then delayed and may take several hours. One of the illustrations of this problem is encountered in the case of people who wish to correct skin dyschromias and use for this purpose cosmetic or dermatological compositions that confer homogeneity, a radiance of the complexion and / or good appearance. For these purposes, it is possible to use covering products which, although concealing cutaneous imperfections, have the major disadvantage of masking the natural appearance of the skin (mask sensation) and are not stubborn, the pigments being eluted at the first wash. It is also known to use products containing dihydroxyacetone (or DHA) which, by imparting a tanned appearance (or in other words conferring a "good look"), can hide the skin imperfections. However, the mechanism of action of DHA on the skin is relatively long. As a result, the coloring effect of the skin is only visible from 4 hours after application. Therefore, the development of the process is limited because most people want to apply their product in the morning and have a visible result within one hour. A color result that evolves for 4 hours can cause problems for those who do not want their entourage to see that their skin is colored through the use of cosmetics.

It is known, to increase the kinetics of color development, to associate DHA with amino acids. In this case, a coloration on the skin is visible in about 1 hour, but this coloration is not stubborn and disappears in the first wash. It is therefore not possible for the moment to propose a cosmetic composition which makes it possible to impart a color change to the skin in a rapid (approximately one hour) and tenacious (for example with a persistence of 2 to 5 days) manner.

This problem related to the use of coloring products is also more or less encountered in all skin cosmetic applications.

The patent application FR2929112 describes the implementation of the combination of alkoxysilanes with solubilizing group and at least one cyclanone derivative in capillary coloration. However, to the knowledge of the Applicant, nothing in the state of the art discloses the possibility of using a compound capable of condensing in situ, that is to say in or on the skin, in a process. cosmetic treatment for conferring a localized, fast and tenacious property a particular property to the skin.

Surprisingly, the Applicant has shown that it is possible to form in the surface layers of the skin or on the skin a condensate conferring on the skin a property of capturing compounds of cosmetic interest. This so-called "capture" layer is formed by in situ condensation of at least one compound or set of compound A which will be described later. In a particularly surprising way, the Applicant has also been able to show that very good cosmetic results could be obtained when the compounds of cosmetic interest (hereinafter called C) are chosen so that they reduce the solubility in the condensate water of A (also referred to hereafter as "material from the condensation of 30 A").

The advantageous properties obtained by the process according to the invention are in particular: an acceleration of the kinetics of action of the compound of cosmetic interest, and / or an improvement in the durability of the cosmetic effect of the ingredient, and / or 5 - the appearance of an unexpected cosmetic property on the skin.

The invention therefore relates to a cosmetic skin treatment method, comprising the application on the skin of: a compound or set of compounds A capable of being condensed in situ and exhibiting at least one free FA reactive function after condensation; and a compound C of cosmetic interest comprising a reactive functional group Fc capable of forming a covalent bond by reaction with the FA function, the material resulting from the condensation of A being soluble in water, and C being chosen so the reaction of said compound C on the material resulting from the condensation of A leads to a decrease in the solubility of said material in water.

According to another aspect, the invention relates to a process for insolubilizing a condensate in the skin, comprising the application on the skin of: - a compound or set of compounds A capable of condensing in situ and having at least one reactive function FA free after condensation; and a compound C of cosmetic interest comprising a reactive functional group Fc capable of forming a covalent bond by reaction with the FA function, the material resulting from the condensation of A being soluble in water, and C being chosen so the reaction of said compound C on the material resulting from the condensation of A leads to a decrease in the solubility of said material in water.

The subject of the invention is also a process for reducing the solubility (or even insolubilizing) on or in the skin of the material resulting from the condensation of a compound or set of compounds A capable of condensing in situ and having at least one free reactive function AF after condensation, said material being soluble in water, comprising the application on said material of a compound C of cosmetic interest comprising a reactive function Fc capable of forming a chemical bond which may be covalent or ionic, by reaction with the FA function, C being chosen so that the reaction of said compound C on the material resulting from the condensation of A leads to a decrease in the solubility of said material in water.

An object of the invention also relates to a process for obtaining on or in the skin an insoluble condensate having cosmetic properties, comprising the application on the skin of: - a compound or set of compounds A suitable for condensation in situ and having at least one reactive function FA free after condensation; and a compound C of cosmetic interest comprising a reactive functional group Fc capable of forming a covalent or ionic bond by reaction with the FA function, the material resulting from the condensation of A being soluble in water, and C being chosen so that the reaction of said compound C on the material resulting from the condensation of A leads to a decrease in the solubility of said material in water.

The invention also relates to the use of a compound C to reduce the solubility (or insolubilize) of a material resulting from the condensation of a compound or set of compounds A capable of being condensed in situ and having at least a free reactive function FA after condensation, said material being soluble in water, C being a compound of cosmetic interest comprising a reactive function Fc capable of forming a covalent or ionic bond by reaction with the FA function.

The Applicant has indeed been able to demonstrate that the application of these two types of compounds on the skin makes it possible to impart localized, rapid and tenacious cosmetic properties. The decrease in the solubility of the material resulting from the condensation of A makes it possible to further increase its persistence on and / or in the skin (resistance to water, sweat, sebum, etc.) while maintaining or even reinforcing, the cosmetic property conferred by the compound C.

Each element of the invention will now be described in detail.

The capture layer is formed in situ in the superficial layers of the skin by condensation of a compound or a set of compounds A.

In the context of the present invention, the term "skin" describes the skin or the scalp.

According to a first particular embodiment, a compound A capable of condensing in situ is used. In this embodiment, the compound A must comprise at least two reactive functions: a function allowing the compound A to condense on itself and at least one so-called capture reactive function FA, or a function leading to the formation of an FA function after condensation.

According to a second embodiment, a set of compounds A is used. This embodiment comprises the implementation of at least two molecules capable of condensing with each other. In this case, and according to the invention, the molecules constituting the set of compounds must comprise one (or more) function (s) allowing condensation of the set A, and one (or more) function (s) allowing the presence of a reactive function FA capture after condensation. According to a particular embodiment, the function (s) FA is present on only one of the compounds of the set of compounds A. In another embodiment, the function (s) reagents is present on at least two compounds of the set of compounds.

In other words, with a set of compounds A consisting of Al and A2 molecules, A2 may not contain a capture function. In this case, either the compound A1 has capture functions, or these appear at the end of the condensation reaction. Alternatively, the compound A2 may contain capture functions. In this case, the compound Al may contain no capture function.

As an illustration, the condensation of the set of compounds A can be represented in the following manner.

A compound set comprising two compounds: A1 and A2 - ter case: A1 comprises a capture function (FA-Al compound); not A2

produces condensation: ... A1-A2 -A1-A2 -Al ... FA FA FA - 2nd case: Al and A2 include a capture function (identical or different) (FA-Al compound and F'A compound -Al) FIA F 'A produces condensation: ... A1-A2 -A1-A2 -Al ...

FA FA FA

It is understood that this particularly simplified schematic example is presented for illustrative purposes only and should not be considered as limiting the invention.

According to a preferred embodiment, the method according to the invention comprises: the application on the skin of a compound A capable of condensing in situ and exhibiting at least one free reactive function FA after condensation; and the application of a compound C of cosmetic interest comprising a reactive function Fc capable of forming a covalent bond by reaction with the FA function.

The description of the condensation and capture functions will be made hereinafter with reference to A, which will indifferently denote a compound A or a set of compounds A (for example Al + A2) described above.

The capture function (s) must be at least partly free after condensation of A to react with the compound C. Alternatively, the capture function (s) may not exist or be in free form in the compound or set of compounds A but appear or become free at the end of its condensation. It may be, for example, primary amine functions that may appear following the action of an enzyme naturally present on the skin.

Preferably, the free capture functions after condensation must be in proportion such that Fcapt / A> 0.1 and preferably> 0.5, Fcapt and A respectively represent the quantities in number of free capture functions after condensation and of In other words, there exists after condensation at least one free capture function for 10 molecules of A, preferably at least 5 free capture functions.

The FA capture functions of the compound or set of compounds A are typically selected from amines and other nucleophilic functions, such as hydroxyl, thiol, sulphate and phosphate functions. Preferentially, it is amines; preferentially, primary amines.

The condensation of A can come from the reaction of a nucleophilic species on an electrophilic species. According to a first alternative, the condensation functions are typically those allowing the creation of a bond by elimination of a molecule of water according to the following equation: R-OH + HO-R '4 ROR' + H2O In a mode In particular, the compounds used are organosilanes.

According to a second alternative, the condensation may come from the reaction of a species by tearing out a proton of a second species, in particular according to one of the following equations: R-CH = CH 2 + HR 4 R-CH 2 In the above equations, R and R 'denote independently of each other any group of atoms, it being understood that the product of the condensation of A must comprise at least one free FA function.

Preferably, the condensation is done according to the first alternative described above. In a particular embodiment, compound A is an organic silicon compound comprising from 1 to 3 silicon atoms, and at least two hydroxyl or hydrolyzable groups per molecule. Compound A is therefore chosen from organosilanes comprising a silicon atom and organosiloxanes comprising two or three silicon atoms, preferably two silicon atoms.

According to a preferred embodiment, compound A is an organosilane. The compound A may especially be an alkoxysilane, and preferably a functionalized alkoxysilane. 10

The set of compounds A may be the mixture of an organic silicon compound as described above (compound A1) and at least one other compound (compound A2) such as the set comprising the organic silicon compound and the compound A2 is capable of condensing in situ. Preferably, the compound A (or at least one of the compounds of the set of compounds A) has the formula: R 1 R, in which: R 4 represents a halogen, an OR 'or R' 1 group;

R5 is halogen, OR "or R'2, R6 is halogen, OR" or R'3;

and R 1, R 2, R 3, R ', R ", R"', R '1, R' 2, R '3 represent, independently of one another

other, a saturated or unsaturated hydrocarbon group, linear or branched, optionally carrying additional chemical groups such as acidic or amine groups, R1, R2, R ', R "

and R "'may further denote hydrogen, and at least two of R4, R5 and R6 are different from R'1, R'2 and R'3.

Preferably, R 1, R 2, R ', R "and R"', R '1, R' 2 and R '3 represent a C 1 to C 12 alkyl group, a C 6 to C 14 aryl group, an alkyl group of C 1 C6-C18-C8-aryl, and C6-C14-C18-C8 aryl; and R3 is preferably C1-C12 alkyl, C6-C14 aryl, C6-C14 C1-C8-aryl alkyl, and C6-C14-alkyl aryl thereof.

C1 to C8. The preferred organosiloxanes in the compositions of the present invention may be represented by the formula: ## STR2 ## wherein: R 1, R 2, R 3, R5 and R6 are defined as before;

R'4 represents a halogen (fluorine, bromine, chlorine or iodine) or a group OR1 1 R7 represents a halogen, a group OR10 or R "1;

R9 represents a halogen, a group OR8, R "2 or R3NR1R2;

R "1, R" 2, R8, R10 and R11 represent a hydrocarbon group, saturated or unsaturated, linear or branched, optionally carrying additional chemical groups such as basic solubilizing groups; Rl 1, R10 and R8 may further denote hydrogen.

Preferably, R "1, R" 2, R 8 or R 10 and R 11 represent a C 1 to C 12 alkyl group, a C 6 to C 14 aryl group, a C 6 to C 14 C 18 to C 18 aryl alkyl group, and an aryl group. from C6 to C14-alkyl of C1 to C8.

At least one of R6, R7 and R9 is a halogen or a group OR ", OR10 or OR8, Preferably halogen is chlorine.

A particularly preferred class of organic silicon compounds consists of compounds of formula: OR 'LT2N {-R-OR in which the radicals R, which are identical or different, are chosen from C1-C6 alkyl radicals such as methyl, ethyl, propyl, butyl and n is an integer from 1 to 6,

preferably 2 to 4. In particular, the compound A is an alkoxysilane comprising at least one nucleophilic capture function, and in particular γ-aminopropyl triethoxysilane, called APTES in the remainder of this text, or a derivative thereof.

The compound A2 capable of being involved in the process according to the present invention, when a set of compounds A is applied to the skin, may for example satisfy the same definition as the compound A given above. The compound A2 can in particular be chosen from molecules having the capacity to form an Si-O-Si bond. As an illustration, mention may be made of methyl triethoxysilane (MTES).

A is chosen so that condensation occurs only once it has reached the zone where this condensation is to take place. For example, compound A can be very reactive, and its condensation can be done on the surface of the skin. Alternatively, the condensation can be done once the compound A has penetrated into the skin in a more or less deep way.

In general, the compound A, or the set of compounds A, is soluble in water because of the reactive functions which it comprises. In view of these properties, the material resulting from the condensation of A is also generally soluble in water.

The compound of cosmetic interest (compound C) is a compound making it possible to confer at least one specific property on the skin, or a mixture of such compounds, and comprises at least one chemical function Fc that is capable of reacting with at least one of the functions of Free capture of the material resulting from the condensation of compound A or the set of compounds A.

Compound C may also be able to react on itself.

As chemical functions Fc which are capable of reacting with at least one of the free capture functions of the material resulting from the condensation of compound A or of the set of compounds A, there may be mentioned in particular halogen atoms and carbonyl functions. , carboxylic acids, esters, amines and hydroxyls.

In particular, these are functions including a carbonyl group. In a preferred embodiment of the invention, compound C contains at least one aldehyde or ketone function and is capable of reacting with a primary amine (representing the FA function of the compound or set of compounds A) as follows: Compound C may be chosen from simple aldehydes, conjugated aldehydes, aromatic aldehydes such as benzaldehydes and activated ketones, in particular by an attractor group, or conjugation functions.

The carbonyl functions can be in enol form. The carbonyl functions can also be engaged, as for example in the case of acetals, hemiacetals, ketals, and their sulfur equivalents. Among the other carbonyl functional groups that may be envisaged in this context, mention may be made, for example, of esters, acid halides, anhydrides and isocyanates.

More generally, the Fc functions of compound C are typically electron-withdrawing groups and thus can be selected from: - epoxides, - aziridines, - vinyl and activated vinyl functions, in particular the acrylonitrile, acrylic and methacrylic ester functions, crotonic acids and esters, cinnamic acids and esters, styrene and its derivatives, butadiene, vinyl ethers, vinyl ketones, maleic esters, vinyl sulfones, maleimides, amines and hemi-amines, Alpha-hydroxyketones, alpha-haloketones, lactones, thiolactones, thiocyanates, imines, imides, in particular succinimide and glutimide, N-hydroxysuccinimide esters, imidates, thiosulfates, oxazines and oxazolines, oxaziniums and oxazoliniums, alkyl or aralkyl halides of formula RX, with X = I, Br, Cl, unsaturated ring halides, carbon or heterocycle, especially chlorotriazines, chloropyrimidine, chloroquinoxalines and chlorobenzotriazole, - the sulfonyl halides RSO2X with X = C1 or F, R being a C1 to C30 alkyl.

Those skilled in the art are perfectly familiar with the chemical functions to be used in the compound 10 or the set of compound A as a capture function (FA) and capable of reacting with each of the chemical functions described in the preceding paragraph.

The following scheme shows the case where a compound C comprising an Fc imine function is reacted on a primary amine capture function. Also within the scope of the invention are compounds C which react with the free capture functions after condensation of A by a physicochemical effect such as complexation, the formation of salts which can crystallize, the formation complexes or salts insoluble in water or the formation of ionic liquids.

In a particular embodiment, preference is given to compounds C capable of reacting more than once with the material resulting from the condensation of A. For example, mention may be made of: compounds C having more than one reactive function (by for example, a dialdehyde); Compounds C which, once they have reacted with the material resulting from the condensation of A, are converted and whose transformation product can still react with the material (for example, an anhydride a part of which is coupled with the free function of A and the other, comprising a carboxylic acid function, can also react with the free function of A, for example an amine function) - compounds C which, once they have reacted with the material resulting from condensation of A, are transformed and can still react with another molecule C, the latter having reacted or not with the material resulting from the condensation of A (for example DHA); + NH3 - compounds C which, once they have reacted with the material resulting from the condensation of A, are capable of reacting with a compound D which will react between molecules C or between molecules C and A.

The following section describes in a non-exhaustive manner examples of properties that can be conferred on the skin by carrying out the process according to the invention.

The invention applies to the treatment of the skin in general. Compound A, or the set of compounds A, and compound C are then chosen according to the desired effect on the skin: to modify its color. Compounds A and C are thus typically used which, in addition to the requirements described above, give a chromophore. Either a compound A which is colored or a set of compounds A which is colored is used. Either a compound A and / or a compound C which, colorless, is colored little by little. It is also possible to use compounds A and / or C which have a whitening, bleaching or depigmenting effect. - to change its brightness. Compounds A and C are thus typically used which, in addition to the requirements described above, give a diffusing or very smooth material. For example, C reacts with the material resulting from the reaction of A to give a heterogeneous deposit which, by a light diffusion effect, will reduce the cutaneous gloss. - to modify its flexibility and / or its touch. Compounds A and C are then typically used which, in addition to the requirements described above, provide a soft-touch material or a water-capturing or holding material, such as a hygroscopic compound. to modify its surface physicochemical properties. Compounds A and C are thus typically used which, in addition to the requirements described above, give a material whose surface tension characteristics are different from those of the skin. Or, we use A and C which, in addition to the requirements described above, give a material that occludes the passage of certain molecules. to retain active molecules. or that the C molecules are active once fixed on the material resulting from the reaction of A. It can then benefit from a prolonged effect of the activity of the active molecule. Thus, filters can be used to provide durable photoprotection. or that the active molecules are deactivated by fixation but can be salted out in time. In this case, one also benefits from a prolonged activity. In this case, one can use biological assets or perfumes.

In a particular embodiment of the invention, an active molecule can be attached via the invention. The compounds A and C are chosen so that the release can be triggered, either by a natural action (this is for example the case of a release triggered by the arrival of perspiration), or by a human action (c This is the case of a particular irradiation, for example light (especially UV, visible) or heat. Thus, compounds A and C may be used such that they have a brittle bond, such as thermo or photocleavable.

Also within the scope of the invention, the precisions and methods such as: compounds A and C are incorporated into products such as care, make-up or particular products. the compounds A and C may be applied in one or two stages, possibly with prior, intermediate or subsequent applications of third compounds. when the compounds A and C are applied in a time, the kinetics of reaction and penetration and the functions are such that C does not prevent the reaction of A on itself. In particular the reaction of C on the reactive function of A is slower than the penetration of A and / or slower than the reaction of A on itself. the applications of these compounds are integrated into skincare or makeup routines. For example, the application of compound A is incorporated into a skin preparation routine, and the application of compound C is incorporated into a foundation.

As we have seen above, the compounds or sets of compounds A have properties of solubility in water. Compound A can thus be transported and penetrate the first layers of the skin. Thus, very often, the materials resulting from the condensation of the compounds or sets of compounds A retain a high solubility in water. This is the case, for example, when compound A is an aminoalkylalkoxysilane such as APTES (see below). This solubility in water of the material derived from compound A is lessening its capture effect and more particularly the holding of the capture.

It is conceivable in theory to take a compound A which is soluble in water and sufficiently reactive to give, after condensation, a water insoluble compound. However, in practice, this is difficult because: the functions of the compound A which will allow the capture are preferably nucleophilic functions, in particular amines. However, these functions contribute to the solubility in water of the compound A but also the material resulting from the reaction of the compound A; the reactivity of compound A is preferably chosen to be moderate so that compound A can penetrate the skin more easily. According to one particular embodiment, the reaction of compound C on the material resulting from the condensation of A leads to insolubility. said material in water.

Thus, the described invention involves choosing compound A and compound C so that: - compound C can react with the material resulting from the reaction of A - the application of compound C increases insolubility in water From the material resulting from the reaction of A. To enable him to make this choice, the skilled person can use the method for the selection of compounds A and C suitable as described below. According to a particular embodiment, the compounds A and C are chosen so that the material resulting from the condensation of A is soluble in water, and once C has reacted with the material resulting from the condensation of A, said material is insoluble in water. Compounds A and C are selected as follows: a) A is applied to the suitable aqueous medium in a petri dish under conditions where A can condense; b) after evaporation of the medium, the compound C is applied under conditions allowing its reaction with the material resulting from the condensation of A; c) the weight of the material resulting from the condensation of A having reacted with C is then measured; d) the solubility in water of the condensate reacted with the compound C is measured by placing it in water for 30 minutes, then recovering the unsolubilized part and determining the value PPA + c which corresponds to the weight loss of the material expressed as a percentage; a value PP ,, = 0 indicates total insolubility of the tested material in water; a value.PPx = 100% indicates a total solubility of the tested material in water; e) steps c) and d) are also applied to the material resulting from the condensation of A in the absence of compound C. The PPA value is thus measured. f) we compare the value PPA + c to the value PPA.

According to this selection process, the compounds A and C are retained which make it possible to obtain a value of PPA + c less than the value of PPA, since A has been insolubilized with the addition of C.

Those skilled in the art will choose the compounds to be used in the process according to the invention according to the equation: PPA + c = PPA ù n, or n = PPA-PPA + c, with the understanding that PPA ù n> 0 It will thus retain more particularly the combinations of compounds A and C making it possible to obtain a value of n greater than 15%, preferably n> 30% and even more preferentially n> 50%.

According to a particular embodiment of the invention, PPA + c is less than 15% and PPA is greater than 50%. Preferably, the compound A is chosen so that its reactivity is moderate. Compound A remains in monomer form for the most part, and does not form more monomer + dimer + trimer.

To verify this point, the following test is used: A is placed under the same conditions as those used at the time of application to the skin. - Analytical methods, such as NMR, IR, etc. are used. to determine the reaction rate of A under these conditions. We deduce the ratio, with respect to the set of entities 20 A, of entities A having reacted: Am. - preferentially according to the invention, the ratio: Am / A (where ml, 2, 3) is greater than 50%, or even more preferably greater than 75%. in the case where the process involves action on A before or during the application (for example a mixture at the moment of use), the analytical determination is carried out 5 minutes after this action (for example, the mixing is carried out at time of use and then analyze 5 minutes later).

Properties that can be imparted to the skin by compound C and / or compound A. 30 - Color

In a particular embodiment, the method according to the invention is a cosmetic process for coloring the skin, in which compound C is a molecule capable of imparting a color to the skin. In the present invention, the property "color Means at least one color effect of the skin which may be for example an increase or a change in color, a change in chromaticity, the appearance of fluorescence, phosphorescence, chemiluminescence, gloss or tarnishing.

In order to confer a color property, compounds A and C are typically used which, in addition to the requirements described above, give a chromophore. It is also possible to use a compound A which is colored, and / or a compound C which is colored, or a compound A and / or a compound C which, colorless, gradually colors. It is also possible to use compounds A and / or C which have a whitening, bleaching or depigmenting effect.

In particular, the final color may be more aesthetic than that which would have given compound C in the absence of compound A. For example, it may better match the skin tone or give a more natural appearance. Compounds C which give no color in applications outside the present invention give in the present invention interesting color effects.

Compound C can be colored. In this case, the invention may in particular serve to improve the color fastness.

Compound C may not be colored. In this case, the invention serves to make the color appear, and possibly give an appearance to this color.

Finally, the compound C may not be colored or give color by reaction with the compound A. In this case, the compound C is chosen so that it can give, by a transformation after application, a prior manner, concomitant or subsequent to the reaction with the material resulting from the condensation of A, a colored species. In particular, compound C can give a colored species by oxidation reaction. C may be, in this context a polyphenol, a diamine compound, or an amino hydroxyl compound. Compound C can naturally turn into a colored species, or it is possible to trigger or assist the transformation, for example by adding an oxidant, a catalyst or an oxidation enzyme.

According to a particularly surprising embodiment of the invention, it is also possible by the method described above to obtain effects such as fluorescent effects, which are often very difficult to obtain, even in an unsustainable manner (see below). in the description of compounds C which may be used to impart a color effect).

The Applicant has also been able to show that it was possible to modulate the behavior over time of the color effect by adjusting the interval between the application of A and C on the skin. This property can be exploited to obtain upper or intermediate holdings, which are not attainable with the coloring methods conventionally used.

For example, you can get a tanned effect for a period of 2 days. Such behavior is suprenante compared to that conventionally obtained with the current methods of dyeing, especially with respect to colorations obtained with DHA alone. It can adapt to those who want to please the time of a weekend for example.

The compounds C making it possible to give the skin a color effect according to the invention may in particular be chosen from the lists below.

o Self-tanning agents: The self-tanning agents are generally selected from certain mono or polycarbonyl compounds such as, for example, isatin, alloxane, ninhydrin, glyceraldehyde, mesotartaric aldehyde, glutaraldehyde, erythrulose, pyrazoline derivatives. -4,5-diones as described in patent application FR 2 466 492 and WO 97/35842, dihydroxyacetone (DHA), 4,4-dihydroxypyrazolin-5-ones derivatives as described in the patent application EP 903 342. DHA will preferably be used.

DHA may be used in free form and / or encapsulated for example in lipid vesicles such as liposomes, in particular described in application WO 97/25970.

The self-tanning agent (s) are generally present in proportions ranging from 0.1 to 15% by weight and preferably from 0.2 to 10% by weight, and more preferably from 1 to 8% by weight relative to the total weight of the composition containing them. o Other compounds C usable to confer a color effect:

The compound C may also be chosen from molecules which, although colorless, are capable of forming colored compounds after their use according to the invention, in particular in the case where the compound A is the APTES (or a film of Po1yAPTES, product of the condensate of the APTES). Mention may in particular be made of cinnamaldehyde, citronellal and citral. Cinemaldehyde Compound C may also be chosen from molecules which are capable of forming fluorescent compounds under UV (optical brighteners) after their application according to the invention, in particular in the case where compound A is the APTES. In particular, nonanal and hydroxycitronellal may be mentioned. In fact, the Applicant has been able to observe the surprising appearance of fluorescence in the areas of the skin where the process according to the invention has been used.

To give the skin a gloss property, compounds A and C are typically used which, in addition to the requirements described above, give a diffusing or otherwise very smooth material. For example, C may react with the material from the condensation of A to give a powder. - Conditioning of the skin

In a particular embodiment, the method according to the invention is a cosmetic skin-conditioning process, in which compound C is a molecule capable of modifying the physicochemical properties of the skin.

In particular, it is possible to use agents that make it possible to modify the physico-chemical properties of the surface of the skin. Thus, compounds A and C are typically used which, in addition to the requirements described above, provide a material whose surface tension characteristics are different from those of the skin. It is also possible to use compounds A and C which, in addition to the requirements described above, give a material which occludes the passage of certain molecules.

The conditioning of the skin can be achieved by using a compound C selected from conditioning polymers.

o Conditioner polymers:

The conditioning polymers that may be used in the context of the invention may be chosen from the following lists: hydrophobic acrylamido-2-methylpropanesulphonic acid (AMPS) polymers that may be used in accordance with the invention; The invention may comprise both a hydrophilic part and a hydrophobic part (amphiphilic polymers) comprising at least one fatty chain. The fatty chain present in the polymers of the invention preferably comprises from 7 to 30 carbon atoms and more preferably from 7 to 22 carbon atoms. The amphiphilic polymers in accordance with the invention generally have a weight-average molecular weight ranging from 50,000 to 10,000,000, more preferably from 100,000 to 8,000,000 and even more preferably from 100,000 to 7,000,000. Amphiphilic polymers AMPS according to the invention can be crosslinked or uncrosslinked. The crosslinking agents may be chosen in particular from methylenebisacrylamide, allyl methacrylate and trimethylol propane triacrylate (TMPTA). The level of crosslinking preferably ranges from 0.01 to 10 mol% and more particularly from 0.2 to 2 mol% relative to the polymer. The amphiphilic AMPS polymers in accordance with the invention may especially be chosen from AMPS random amphiphilic polymers modified by reaction with a n-monoalkylamine or a C6-C22 di-n-alkylamine such as those described in the application for WO00 / 31154. These polymers may also contain other hydrophilic ethylenically unsaturated monomers chosen, for example, from acrylic acid, methacrylic acid or their substituted alkyl derivatives or their esters obtained with mono or polyalkylene glycols, acrylamide, methacrylamide or vinylpyrrolidone. , itaconic acid or maleic acid or mixtures thereof. The preferred AMPS polymers of the invention are chosen from AMPS amphiphilic polymers and at least one ethylenically unsaturated monomer comprising at least one hydrophobic part having 7 to 30 carbon atoms and more preferably 7 to 22 carbon atoms. carbon atoms and even more preferably from 12 to 22 carbon atoms.

This hydrophobic part may be a linear, saturated or unsaturated (for example noctyle, n-decyl, nhexadecyl, n-dodecyl, oleyl), branched (for example isostearic) or cyclic (for example cyclododecane or adamantane) alkyl radical. These same polymers may additionally contain one or more hydrophilic ethylenically unsaturated comonomers such as acrylic acid, methacrylic acid or their alkyl substituted derivatives or their esters obtained with mono or polyalkylene glycols, acrylamide, methacrylamide and vinylpyrrolidone, itaconic acid or maleic acid. These same polymers may additionally contain one or more hydrophobic ethylenically unsaturated comonomers comprising, for example: a fluorinated or alkylfluorinated C7-C18 radical (for example the group of formula? (CH2) 2-25 (CF2) 9 -CF3); a cholesteryl radical or a radical derived from cholesterol (for example, cholesteryl hexanoate); an aromatic polycyclic group such as naphthalene or pyrene; a silicone or alkylsilicone or alkylfluorosilicone radical. These copolymers are described in particular in patent applications (CLARIANT): EP 1 069 142, WO 02/44224, WO02 / 44225, WO02 / 44227, WO02 / 44229, WO02 / 44230, WO02 / 44231, WO02 / 44267, WO02 / 44268, WO02 / 44269, WO02 / 44270, WO02 / 44271, WO02 / 43677, WO02 / 43686, WO02 / 43687, WO02 / 43688 and WO02 / 43689.

The hydrophobic monomers containing ethylenic unsaturation of the invention are preferably chosen from the acrylates or acrylamides of formula (1) below: ## STR2 ## in which R 27 denotes a hydrogen atom, a linear or branched alkyl radical, C6 (preferably methyl); Y is O or NH; R28 denotes a hydrophobic radical comprising a fatty chain having from 7 to 30, preferably from 7 to 22, and more particularly from 12 to 22 carbon atoms.

The hydrophobic radical R28 is preferably chosen from linear C7-C22 alkyl radicals, saturated or unsaturated (for example n-octyl, n-decyl, n-hexadecyl, n-dodecyl, oleyl), branched (for example isostearic) or cyclic (eg cyclododecane or adamantane); C7-C18 perfluorinated alkyl radicals (for example the formula group - (CH2) 2- (CF2) 9-CF3); the cholesteryl radical or a cholesterol ester such as cholesteryl hexanoate; polycyclic aromatic groups such as naphthalene or pyrene. Among these radicals, linear and branched alkyl radicals are more particularly preferred.

According to a particularly preferred form of the invention, the hydrophobic radical R 28 additionally comprises at least one alkylene oxide unit and preferably a polyoxyalkylene chain. The polyoxyalkylene chain is preferably composed of ethylene oxide units and / or propylene oxide units and even more particularly consists solely of ethylene oxide units. The number of moles of oxyalkylenated units generally varies from 1 to 30 moles and more preferably from 1 to 25 moles and even more preferably from 3 to 20 moles.

Among these polymers, mention may be made of: - crosslinked or non-crosslinked copolymers, neutralized or not, comprising from 15 to 60% by weight of AMPS units and from 40 to 85% by weight of (C 8 -C 16) alkyl (meth) units acrylamides or (C 8 -C 16) alkyl (meth) acrylate units with respect to the polymer, such as those described in EP-A-750 899; CI - k - terpolymers comprising from 10 to 90 mol% of acrylamide units, from 0.1 to 10 mol% of AMPS units and from 5 to 80 mol% of n- (C 6 -C 18) alkylacrylamide units, relative to the polymer, such as those described in US-A-5,089,578.

Amphiphilic polymers which may also be mentioned are copolymers of totally neutralized AMPS and of n-dodecyl, n-hexadecyl and / or noctadecyl methacrylate, as well as copolymers of non-crosslinked AMPS and n-dodecylmethacrylamide and crosslinked. More particularly, crosslinked or non-crosslinked amphiphilic copolymers consisting of:

(A) 2-acrylamido-2-methylpropanesulphonic acid (AMPS) units of the following formula (2): ## STR5 ##

Wherein X + is a proton, an alkali metal cation, an alkaline earth cation or the ammonium ion;

(b) and of the following formula (3):

_r H2. wherein n and p, independently of each other, denote a number of moles and range from 0 to 30, preferably from 1 to 25 and more preferably from 3 to 20, reserve that n + p

Less than or equal to 30, preferably less than 25, and most preferably less than 20; R27 has the same meaning indicated above in formula (1) and R29 denotes a linear or branched alkyl having m carbon atoms, m ranging from 7 to 22, preferably from 12 to 22. In formula (2), the cation X + denotes more particularly sodium or ammonium. Among the monomers of formula (3), mention may be made of (meth) acrylic acid esters and C 10 -C 18 fatty alcohol polyoxethylenated with 8 OE such as the product GENAPOL C-080 sold by Clariant; esters of (meth) acrylic acid and fatty oxoalcohol in polyoxyethylenated C11 with 8 OE, such as the product GENAPOL UD-080 sold by CLARIANT; esters of (meth) acrylic acid and C12-C14 polyoxyethylenated fatty alcohol at 7 OE, such as the product GENAPOL LA-070 sold by CLARIANT; esters of (meth) acrylic acid and polyoxyethylene fatty alcohol C12-C14 to 11 EO such as the product GENAPOL LA-110 sold by CLARIANT; esters of (meth) acrylic acid and polyoxyethylenated fatty alcohol C16-C18 to 8 EO like the product GENAPOL T-080 sold by CLARIANT; esters of (meth) acrylic acid and polyoxyethylenated fatty alcohol C16-C18 to 15 EO such as the product GENAPOL T-150 sold by Clariant; esters of (meth) acrylic acid and polyoxyethylenated fatty alcohol C16-C18 at 11 EO, such as the product GENAPOL T-110 sold by CLARIANT; Esters of (meth) acrylic acid and polyoxyethylenated fatty alcohol C16-C18 to 20 OE such as the product GENAPOL T-200 sold by Clariant; esters of (meth) acrylic acid and polyoxyethylenated fatty alcohol C16-C18 at 25 OE such as the product GENAPOL T-250 sold by CLARIANT; and esters of (meth) acrylic acid and polyoxyethylenated fatty alcohol C18-C22 at 25 EO and / or polyoxyethylenated fatty alcohol at C16-C18 at 25 EO. In particular, the following will be chosen: (i) those non-crosslinked for which p = 0, n = 7 or 25, R27 denotes methyl and R29 represents a mixture of C12-C14 or C16-C18 alkyls, (ii) those crosslinked for which p = 0, n = 8 or 25, R27 is methyl and R29 is a mixture of C16-C18 alkyls. These polymers are described and synthesized in application EP1069142. These particular amphiphilic polymers can be obtained by conventional methods of radical polymerization in the presence of one or more initiators such as, for example, azobisisobutyronitrile (AIBN), azobisdimethylvaleronitrile, hydrochloride of 2,2-azobis [2 amidinopropane] (ABAH = 2,2-Azo-Bis- [2-Amidinopropane] Hydrochloride), organic peroxides such as dilauryl peroxide, benzoyl peroxide and tert-butyl hydroperoxide, mineral peroxidized compounds such as potassium or ammonium persulfate, or hydrogen peroxide H2O2, optionally in the presence of reducing agents.

These amphiphilic polymers may in particular be obtained by radical polymerization in tert-butanol medium in which they precipitate. By using precipitation polymerization in tert-butanol, it is possible to obtain a particle size distribution of the polymer which is particularly favorable for its uses.

The reaction may be conducted at a temperature between 0 and 150 ° C, preferably between 10 and 100 ° C, either at atmospheric pressure or under reduced pressure. It can also be carried out under an inert atmosphere, and preferably under nitrogen. The polymers according to the invention are preferably neutralized partially or totally by a mineral or organic base such as those mentioned above.

The molar concentration in% of the units of formula (2) and units of formula (3) in the amphiphilic polymers according to the invention varies according to the desired cosmetic application, the nature of the emulsion (oil-in-water water or water-in-oil) and the desired rheological properties of the formulation. It can vary between 0.1 and 99.9 mol%. The amphiphilic AMPS polymers of the invention which are not very hydrophobic will be more suitable for the thickening and / or the stabilization of the oil-in-water emulsions. The molar proportion of units of formula (3) will preferably vary from 0.1 to 50%, more particularly from 1 to 25% and even more particularly from 3 to 10%. The more hydrophobic AMPS amphiphilic polymers according to the invention will be more suitable for the thickening and / or the stabilization of the water-in-oil emulsions. The molar proportion of units of formula (3) will preferably vary from 50.1 to 99.9%, more particularly from 60 to 95% and even more particularly from 65 to 90%. The distribution of the monomers in the polymers of the invention may be, for example, alternating, block (including multiblock) or any. As an indication and without limitation, mention will be made of the following commercial references: Aristoflex HMS, Aristoflex LNC, Aristoflex SNC and Aristoflex HMB marketed by Clariant.

As indicated above, these hydrophobic AMPS polymers as described can be used as additives in an emulsion, and in this case will be solubilized preferentially in the aqueous phase thereof, or as emulsifiers. In this case, they allow the formation of O / W emulsions as described in the applications WO02 / 055039, WO02 / 055038, EP1353642, EP1353633, WO02 / 055052, FR2853544 and EP1466587. oxyethylenated PDMS derivatives (or water-soluble silicones) The water-soluble silicones that can be used in the invention are preferably chosen from compounds of general formulas (I) and (II): ## STR2 ## - SEE-R, I-E v R5 Rsi-sii ~ '~ cri, in which:

the radicals R5, which may be identical or different, denote a monovalent hydrocarbon radical chosen from alkyl, aryl and aralkyl groups containing not more than 10 carbon atoms and preferably chosen from C1-C4 lower alkyls, such as methyl or ethyl, butyl or selected from phenyl and benzyl and even more preferably all of them refer to methyl; some of the R 5 radicals may also contain one plus one ethylcyclohexylenemonoxide group and are small in the polysiloxane chain; u is 5 to 59, preferably 10 to 50 and more preferably 12 to 25; - v is 3 to 12, preferably 4 to 10 and more preferably 5 to 8; - E denotes a group -CXH2z (OC2H4) y- (OC3H6) z OR6 where: - x is 1 to 8, preferably 2 to 4 and more preferably 3; Y = 0 and z 0; y and z being chosen so that the total molar mass of the radical E ranges from 200 to 10,000 g / mol and more preferably from 350 to 3,000; preferably, the number z is equal to zero. R6 denotes a hydrogen atom, a linear or branched C1-C8 alkyl radical (preferably a C1-C4 alkyl radical) or a C2-C8 acyl radical (preferably a C2-C4 acetyl radical). In formula E, the oxyethylene and oxypropylene units may be distributed in the polyether chain E in a random manner and / or in block form. The water-soluble silicones according to the invention are known and in particular described in US Pat. No. 5,338,352 and their method of preparation is described in particular in US Patent 4,847,398. Such silicones are for example sold by OSI under the trade names Silwet L-720®, Silwet L-7002®, Silwet L-7600®, Silwet L-7604®, Silwet L-7605®, Silwet L-7607® , Silwet 1614, Silwet L-7657®, Silwet L-7200®, Silwet L7230, Silsoft 305, Silsoft 820, Silsoft 880, Tego Wet 260, Tegowet 500, Tegowet 505 and Tegowet 510®. amphiphilic block polymers The block copolymers used in the process according to the invention are, in particular, amphiphilic, nonionic, diblock or triblock block polymers, which may form, in contact with water, micelles, vesicle-type particles (for example liposomes) or lyotropic liquid crystal phases of lamellar, cubic (direct or inverse) or hexagonal (direct or inverse) in contact with water. They are in particular diblock type (A-B) or triblock (A-B-A), A corresponding to a nonionic hydrophilic polymeric block and B to a hydrophobic polymeric block. The molecular weight of the polymers can be between 1000 and 100,000 and the ratio A / B can be between 1/100 and 50/1.

The block copolymers used can in particular be chosen from amphiphilic block polymers based on polystyrene.

The hydrophobic polymeric block can then be selected from polystyrene and poly (tert.-butylstyrene).

The nonionic hydrophilic polymeric block is preferably selected from polyethylene oxide (POE) and polyvinylpyrrolidone (PVP).

By way of examples, mention may be made of Tegomer SE 1010 and SE 1030 from the company Goldschmidt (cf. Applications EP1555984 and EP1413290 which describe the use of block polymers in sunscreen compositions).

The block copolymers used may also be chosen from polyoxyethylenated amphiphilic block polymers. The hydrophobic polymeric block of the invention may correspond to: Hydrophobic vinyl monomers of formula (A) below: A) in which: R is chosen from H, -CH 3 , -C2H5 or -C3H7, X is selected from: - alkyl oxides of the type where R 'is a linear or branched, saturated or unsaturated hydrocarbon radical having 1 to 22 carbon atoms.

The compound (A) can be methyl methacrylate, ethyl methacrylate, n-butyl (meth) acrylate, tert-butyl (meth) acrylate, cyclohexyl acrylate and isobornyl acrylate. and 2-hexyl ethyl acrylate. The nonionic hydrophilic polymeric block is preferably selected from polyethylene oxide (POE) and polyvinylpyrrolidone (PVP).

The block copolymer is preferably chosen from the following block copolymers: polymethyl methacrylate / polyoxyethylene polybutyl methacrylate / polyoxyethylene By way of example, mention may be made of TegomerBE 1010 and BE 1030 as well as Tegomer ME 1010 and ME 1030 from Goldschmidt (cf. applications EP1555984 and EP1413290 which describe the use of block polymers in sunscreen compositions)

the polysaccharides chosen from: A) cellulose derivatives The preferred derivatives are hydroxyethylcelluloses with a molecular weight of between 50,000 and 2,000,000, carboxymethylcelluloses such as Aqualon's Blanose LF7, hydroxypropylcelluloses and hydrophobic derivatives of C10-C30 cellulose. such as Hercules Natrosol 330+ and Aqualon Polysurf 67; B) Xanthan gums such as Keltrol T from CP Kelco and Guar as Jaguar HP 105 from Rhodia; C) alginates, which may be esterified, such as Kelcoloid O from CP Kelco (esterification rate of 80-85%); D) oxidized polysaccharide derivatives, and made ketonic, such as oxidized insulin; E) fucose derivatives such as polyfucose marketed under the name Fucogel by Solabia; F) fructose derivatives such as Sochibo / Bioland Fructan; G) Rhamnose derivatives such as Rhamnosoft of Solabia; H) pullulan derivatives such as Hayashibara PI-20 pullulan; as well as modified polysaccharides such as guars made cationic, such as Jaguar C13S and C 132.

POE-POP-POE triblock derivatives such as poloxamers, which are soluble in water (1% clear solution in water at ambient temperature) and have a molecular weight (MW) greater than 8000. As examples there may be mentioned Poloxamer 338 (POE-POP-POE: 128/54/128), Poloxamer 407 (POE-POP-POE: 98/67/98), Poloxamer 188 (POE-POPPOE: 75/30). / 75) and Poloxamer 238 (POE-POP-POE: 97/39/97).

polyamino acid derivatives such as polyglutamic acid such as Ishumaru Pharcos Bio PGA solution, polyaspartic acid such as AquaDew SPA-30 from Ajinomoto, polyleucine and polylysine such as polylysine and Epsilon polylysine from Chisso corporation.

galacturonic acid derivatives such as Fluka Dextran.

Copolymers of maleic anhydride or of succinic anhydride, such as Clariant's Licocare PP207 and Wacker Chemie's Wacker GF20.

methyl vinyl ether / ethyl monomaleate copolymers such as Gantrez ES225 from ISP. The poly (alkyloxazoline) derivatives may be used in the process according to the invention as compound C, a conductive polymer which is an oxazoline polymer of formula (I): ## STR2 ## in which R1 is a C1-C4 lower alkyl radical, and preferably an ethyl group and has a value such that the molecular weight is at least 10000. The oxazoline polymers of formula (I) have a molecular weight greater than 10,000. , generally between 20,000 and 1,000,000, and preferably between 50,000 and 500,000, and are prepared by polymerization of 2-alkyl-2-oxazoline. The preferred polymers are homopolymers of ethyloxazoline having a molecular weight of between 20000 and 10 000, and more particularly those sold under the name of PEOX by Dow Chemical Company having molecular weights of 50,000 to 500,000.

A more particularly preferred polymer according to the invention is represented by an homopolymer of ethyloxazoline with a molecular weight of 50000.

By way of non-limiting example, mention may be made of the products of Dow Chemical, marketed under the name of PEOX (PM 50000), PEOX (PM 200000), PEOX (PM 500000), POLYMER XAS-10874.01, or SigmaAldrich, sold under the names Poly (2-ethyloxazoline) PM 50000, Poly (2-ethyloxazoline) PM 200000 and Poly (2-ethyloxazoline) PM 500000.

acrylic derivatives of phosphorylcholine These polymers are described in the application EP1764078.

Polymers having a methacryloyloxethyl phosphorylcholine (MPC) group are particularly effective in improving the water retention properties on the surface of the skin and hair. Their use in the cosmetic field has been the subject of the applications of Pola, JP2832119 (corresponding US5,468,475 and FR2698003) as a means for moisturizing the skin and the hair and can be used as conditioning polymers in the context of the present invention. By acrylic polymer with phosphorylcholine group is meant a polymer having an acrylic backbone and comprising pendant groups (or side chains) containing a group of formula (I) below: OR '-R5-OPO-R4-N- R2 (I)

Wherein R ', R2 and R3 independently denote an alkyl group having 1 to 8 carbon atoms; R4 is (CH2-CHR6O) m (CH2-CHR6) - with R6 being hydrogen, methyl or ethyl, and m is an integer from 0 to 10; R5 denotes ù (CH2) g-, g being an integer from 2 to 10.

Such a polymer can be obtained by polymerization of acrylic monomer comprising the group of formula (I) described above, referred to hereinafter in the description of the acrylic monomer PC.

Advantageously, the acrylic monomer PC is a monomer corresponding to the following formula (II):

R7 O R1 CH C-C-OC2H40-P-O (CH2) n-N + - R2 [II] O 0 • R3

wherein R 1, R 2 and R 3 independently denote an alkyl group having from 1 to 8 carbon atoms; n represents an integer ranging from 2 to 4; R7 denotes a hydrogen atom or a methyl group.

As the PC acrylic monomer, mention may be made of the following monomers: 2- (meth) acryloyloxyethyl-2 '- (trimethylammonio) ethyl phosphate, 3- (meth) acryloyloxypropyl-2' - (trimethylammonio) ethyl phosphate, 4- (meth) acryloyloxybutyl-2 '- (trimethylammonio) ethyl phosphate, 5- (meth) acryloyloxypentyl-2' - (trimethylammonio) ethyl phosphast, 2- (meth) acryloyloxyethyl-2 '- (triethylammonio) ethyl phosphate, 3- (meth) acryloyloxypropyl- 2 '(triethylammonio) ethyl phosphate, 4- (meth) acryloyloxybutyl-2' - (triethylammonio) ethyl phosphate, 5- (meth) acryloyloxypentyl-2 '(triethylammonio) ethylphosphate, 2- (meth) acryloyloxyethyl-2' - (tripropylammonio) ) ethyl phosphate, 3- (meth) acryloyloxypropyl-2 '- (tripropylammonio) ethyl phosphate, 4- (meth) acryloyloxybutyl-2' - (tripropylammonio) ethyl phosphate, 5 - (meth) acryloyloxypentyl-2 '- (tripropylammonio) ethyl phosphate 2- (meth) acryloyloxyethyl-2 '- (tributylammonio) ethyl phosphate, 3 - (meth) acryloyloxypropyl-2' - (tributylammonio) ethyl phosphate, 4- (Meth) acryloyloxybutyl-2 '- (tripropylammonio) ethyl phosphate, 5 - (meth) acryloyloxypentyl-2' - (tributylammonio) ethyl phosphate, 2- (meth) acryloyloxyethyl-3 '- (trimethylammonio) propyl phosphate, 2- (Meth) acryloyloxyethyl-4 '- (trimethylammonio) butyl ethyl phosphate, 2- (meth) acryloyloxyethyl-3' - (triethylammonio) propyl phosphate, 2- (meth) acryloyloxyethyl-4 '(triethylammonio) butyl phosphate, 2- (meth) ) acryloyloxyethyl-3 '- (tripropylammonio) propyl phosphate, 2 (meth) acryloyloxyethyl-4' - (tripropylammonio) butyl phosphate, 2- (meth) acryloyloxyethyl-3 '- (tributylammonio) propyl phosphate, 2- (meth) acryloyloxyethyl- 4 '- (tributylammonio) butyl phosphate, 3 - (meth) acryloyloxyethyl-3' (trimethylammonio) propyl phosphate, 3 - (meth) acryloyloxypropyl-4 '- (trimethylammonio) butyl phosphate, 3 - (meth) acryloyloxypropyl-3' ( triethylammonio) propyl phosphate, 3- (meth) acryloyloxypropyl-4 '- (triethylammonio) butyl phosphate, 3 - (meth) acryloyloxypropyl-3' - (tripropylammonio) propyl phosphite ate, 3 - (meth) acryloyloxypropyl-4 '- (tripropylammonio) butyl phosphate, 3 - (meth) acryloyloxypropyl-3' - (tributylammonio) propyl phosphate, 3 - (meth) acryloyloxypropyl-4 '- (tributylammonio) butyl phosphate, 4- (Meth) acryloyloxybutyl-3 '- (trimethylammonio) propyl phosphate, 4- (meth) acryloyloxybutyl-4' - (trimethylammonio) butyl phosphate, 4- (meth) acryloyloxybutyl-3 '(triethylammonio) propyl ethyl phosphate, 4- (Meth) acryloyloxybutyl-4 '- (triehtylammonio) butyl phosphate, 4- (meth) acryloyloxybutyl-3' - (tripropylammonio) propyl phosphate, 4- (meth) acryloyloxybutyl-4 '- (tripropylammonio) butyl phosphate, 4- (meth) ) acryloyloxybutyl-3 '- (tributylammonio) propyl phosphate, and 4- (meth) acylolyloxybutyl-4' (tribuylammonio) butyl phosphate.

As PC acrylic monomer, 2- (meth) acryloyloxyethyl-2 '- (trimethylammonio) ethyl phosphate, also called 2- (methacryloyloxyethyl) phosphorylcholine, is preferably used.

Preferably, the acrylic polymer PC used according to the invention is a polymer obtained by polymerization of a PC acrylic monomer as described above and optionally of one or more additional monomers different from the acrylic monomer PC.

The additional monomers may be chosen from methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, (meth) acrylic acid, (meth) acrylamide, (meth) ) 2-hydroxyethyl acrylate, ethyl vinyl ether, butyl vinyl ether, N-vinylpyrrolidone, vinyl chloride, ethylene, isobutylene, acrylonitrile, styrene, methyl styrene, chloromethyl styrene .

The acrylic polymer PC may comprise from 40 to 100 mol% of units derived from the acrylic monomer PC as described above and from 0 to 60 mol% of units derived from additional monomer.

Preferably, the polymer with a phosphorylcholine group is chosen from the homopolymer of 2- (methacryloyloxyethyl) phosphorylcholine, the 2- (methacryloyloxyethyl) phosphorylcholine / butyl methacrylate copolymer, the 2- (methacryloyloxyethyl) phosphorylcholine / chloride copolymer. 2-hydroxy-3-methacryloyloxypropyltrimethylammonium, 2- (methacryloyloxyethyl) phosphorylcholine / butyl methacrylate / sodium methacrylate terpolymer, 2- (methacryloyloxyethyl) phosphorylcholine / stearyl methacrylate copolymer. Preferably, the 2- (methacryloyloxyethyl) phosphorylcholine homopolymer or the 2- (methacryloyloxyethyl) phosphorylcholine / butyl methacrylate copolymer is used, and more preferably the 2- (methacryloyloxyethyl) phosphorylcholine homopolymer.

Such polymers are described in EP-A-1163905, EP-A-1095665, FR-A-2698003, EP-A6767212, the contents of which are incorporated by reference in the present application.

The acrylic polymer PC preferably has a molecular weight in weight ranging from 50,000 to 1,000,000, and preferably ranging from 80,000 to 800,000.

As acrylic polymers with a phosphorylcholine group according to the invention, it is possible to use:

poly (2- (methacryloyloxyethyl) phosphorylcholine at 40% in a water / butanediol mixture (5% butanediol) sold under the name LIPIDURE HM by the company Nippon Oils and Fats; this product is CTFA: polyphosphorylcholine glycol acrylate (and) butylene glycol;

the copolymer of 2- (methacryloyloxyethyl) phosphorylcholine / butyl methacrylate (90/10) at 5% in solution in water sold under the name LIPIDURE PMB by the company Nippon Oils and Fats; this product is called CTFA: POLYQUATERNIUM-51;

The copolymer of 2- (methacryloyloxyethyl) phosphorylcholine / 2-hydroxy-3-methacryloyloxypropyltrimethylammonium chloride at 5% in solution in water, sold under the name LIPIDURE-C by the company Nippon Oils and Fats;

- the terpolymer of 2- (methacryloyloxyethyl) phosphorylcholine / butyl methacrylate / sodium methacrylate 5% in solution in water, sold under the name LIPIDURE-A by the company Nippon Oils and Fats; and

copolymers of 2- (methacryloyloxyethyl) phosphorylcholine / stearyl methacrylate sold under the names LIPIDURE-S, LIPIDURE-NR and LIPIDURE-NA by the company Nippon Oils and Fats; these products are called CTFA: polyquaternium-61.

polyvinyl alcohol derivatives Polyvinyl acetate is a vinyl polymer produced by radical polymerization of the vinyl acetate monomer and then hydrolyzed, in this case to 88%, to obtain polyvinyl alcohol (PVA), the polymer which interests us in this study has the following pattern: In the present invention, PVA is used in its hydrolysed form ie 88% hydrolyzed polyvinyl alcohol. It is possible in particular to use the PVA sold under the name CELVOL 540 PV ALCOHOL by the company CELANESE CHEMICALS - Biological activity

In a particular embodiment, the method according to the invention is a cosmetic process for modifying a biological activity of the skin.

Compound A can be chosen to allow the material resulting from the condensation of A to retain active molecules (compound C). The molecules can be active once fixed on the material resulting from the condensation of A. It is possible in this case to benefit from a prolonged effect of the activity of the active molecule.

Alternatively, the active molecules may be deactivated by fixation but may be released from the condensate of A and optionally B over time. In this case, it is also possible to benefit from a prolonged activity.

The subject of the invention is therefore also the use of a compound or set of compounds A capable of being condensed in situ and having at least one free reactive function FA after condensation, for capture on the skin and release. prolonged of a compound C of cosmetic or dermatological interest comprising a reactive function Fc capable of forming a covalent bond by reaction with the FA function, the condensate of A bound to the compound being insoluble in water. The invention also relates to a method of cosmetic or dermatological treatment of the skin with prolonged activity, the application on the skin of a compound or set of compounds A capable of being condensed in situ and having at least one function. reactive free FA after condensation, and a compound C of cosmetic or dermatological interest comprising a reactive function Fc capable of forming a covalent or ionic bond by reaction with the FA function which can be released from the material from the condensate of A,, the condensate of A bound to the compound being insoluble in water.

In a particular embodiment of the invention, an active molecule can be attached via the invention. In a particular embodiment, the compounds A and C are chosen so that the release can be triggered, either by a natural action (this is for example the case of a release triggered by the arrival of perspiration), either by a human action (this is the case of a particular irradiation, for example light (in particular UV, visible) or even heat.So we can use compounds A and C, as they are equipped with a brittle bond, such as thermo or photocleavable.

o Skin Treatment Agents Compound C may be a skin treatment agent selected from the following lists.

moisturizing or humectant agents As humectants or moisturizers, there may be mentioned glycerol and its derivatives, urea and its derivatives including Hydrovance® marketed by National Starch, lactic acid, hyaluronic acid, AHAs, BHA, sodium pidolate, xylitol, serine, sodium lactate, ectoin and its derivatives, chitosan and its derivatives, collagen, plankton, imperata cylindra extract marketed under the name Moist 24® by the company Sederma, homopolymers of acrylic acid such as the Lipidure-HM® of NOF Corporation, beta-glucan and in particular the sodium carboxymethyl beta-glucan of Mibelle-AG-Biochemistry; a mixture of passionflower, apricot, corn and rice bran oils marketed by Nestlé under the name NutraLipids®; a C-glycoside derivative such as those described in patent application WO 02/051828 and in particular C-f3-D-xylopyranoside-2-hydroxypropane in the form of a solution containing 30% by weight of active material in a water mixture propylene glycol (60/40 by weight) such as the product manufactured by CHIMEX under the trade name "MEXORYL SBB®"; a muscat rose oil marketed by Nestlé; an extract of microalga Prophyridium cruentum enriched in zinc marketed by Vincience under the name Algualane Zinc®; spheres of collagen and chondroitin sulfate of marine origin (Ateocollagen) marketed by Engelhard Lyon under the name marine filling spheres; spheres of hyaluronic acid such as those sold by the company Engelhard Lyon.

desquamating agents By "desquamating agent" is meant any compound capable of acting: either directly on desquamation by promoting exfoliation, such as (3-hydroxyacids (BHA), in particular salicylic acid and its derivatives ( including n-octanoyl 5-salicylic acid otherwise known as capryloyl salicylic acid); α-hydroxy acids (AHA), such as glycolic, citric, lactic, tartaric, malic and mandelic acids; 8-hexadecene-1 acid, 16-dicarboxylic acid or 9-octadecene dioic acid, urea and its derivatives, gentisic acid and its derivatives, oligofucoses, cinnamic acid, Saphora japonica extract, resveratrol and certain derivatives of jasmonic acid or on the enzymes involved in the desquamation or degradation of corneodesmosomes, glycosidases, stratum corneum chymotryptic enzyme (SCCE) or even other proteases (trypsin, chymotrypsin-like), mention may be made of aminosulphonic compounds and in particular 4- (2-hydroxyethyl) piperazine-1-propanesulfonic acid (HEPES); 2-oxothiazolidine-4-carboxylic acid (procysteine) and its derivatives; glycine-type alpha amino acid derivatives (as described in EP-0 852 949, as well as the sodium methyl glycine diacetate marketed by BASF under the trade name TRILON M); honey ; sugar derivatives such as O-octanoyl-6-D-maltose and N-acetyl glucosamine.

Other desquamating agents that can be used in the composition according to the invention include: oligofructoses, EDTA and its derivatives, laminaria extract, o-linoleyl-6D-glucose, (3-hydroxy-2-pentylcyclopentyl acid ) acetic acid, glycerol trilactate, O-octanyl-6'-D-maltose, S carboxymethyl cysteine, silicon derivatives of salicylate such as those described in patent EP 0 796 861, oligofucases such as those described in the patent EP 0 218 200, salts of 5-acyl salicylic acid, active agents having effects on transglutaminase as in patent EP 0 899 330, ficus opuntia indica flower extract such as Exfolactive® from Silab, 8-hexadecene 1,16-dicarboxylic acid, glucose and vitamin F esters, and mixtures thereof. agents that improve the barrier function As agents that improve the barrier function, there may be mentioned in particular arginine, serine, an extract of Thermus thermophilus such as Sederma's Venuiteane®, an extract of wild yam rhizome (dioscorea villosa) such as Actigen Y® from Active Organics, plankton extracts like Secma's omega plancton®, yeast extracts such as Coletica's Relipidium®, a chestnut extract such as Silab's Recoverine®, a bud extract cedar such as Gatuline Zen® from Gattefossé, sphingosines such as salicyloyl sphingosine sold under the name "Phytosphingosine® SLC" by Degussa, a mixture of xylitol, xylityl polyglycoside and xylitan such as Aquaxyl® from Seppic, solanaceous extracts such as Coletica's Lipidessence®; unsaturated omega 3 oils such as rosebud oil and mixtures thereof.

Ceramides or derivatives, in particular ceramides of type 2 (such as N-oleoyldihydrosphingosine), type 3 (such as stearoyl-4-hydroxysphinganine in INCI name) and type 5 (such as N-2) may also be mentioned in particular. hydroxypalmitoyl sphinganine), sphingoid-based compounds, glycosphingolipids, phospholipids, cholesterol and its derivatives, phytosterols, essential fatty acids, diacylglycerol, 4-chromanone and chromone derivatives. vaseline, lanolin, shea butter, cocoa butter, lanolin, PCA salts.

antioxidants agents that may be mentioned include tocopherol and its esters, in particular tocopherol acetate; ferulic acid; serine; ellagic acid, phloretin, polyphenols, tannins, tannic acid, epoigallocathechin and natural extracts containing them, anthocyanins, rosemary extracts, extracts of olive leaves such as those of the company Silab , green tea extracts, resveratrol and its derivatives, ergothineine, N acetylcysteine, an extract of brown alga pelvetia canaliculata such as Secma's Pelvetiane®, chlorogenic acid, biotin, chelating agents, such as BHT, BHA, N, N'-bis (3,4,5-trimethoxybenzyl) ethylenediamine and its salts; idebenone, plant extracts such as Pronalen Bioprotect TM from Provital; coenzyme Q10, bioflavonoids, SOD, phytantriol, lignans, melatonin, pidolates, glutathione, caprylyl glycol, phloretin, TotarolTM or Podocarpus totara extract containing totarol (totara-8, 11, 13-trienol or 2-phenenanthrenol, 4b, 5, 6, 7, 8, 8a, 9, 10-octahydro-4b, 8,8-trimethyl-1 (1-methylethyl) - a jasmine extract such as that marketed by SILAB under the name Helisun®, hesperitin laurate such as Flavagrum PEG® from Engelhard Lyon, an extract of Paeonia suffructicosa root such as the product marketed by Ichimaru Pharcos under the name Botanpi Liquid B®; lychee extract such as lychee pericarp extract marketed by Cognis under the name Litchiderm LS 9704®, a pomegranate fruit extract (Punica Granatum), such as the product marketed by Draco Natural products.

Other anti-aging agents include DHEA and its derivatives, boswellic acid, rosemary extracts, carotenoids (beta carotene, zeaxanthin, lutein), cysteic acid, copper derivatives and acid. jasmonic.

depigmenting agents As depigmenting agents, mention may in particular be made of alpha and beta arbutines, ferulic acid, lucinol and its derivatives, kojic acid, resorcinol and its derivatives, tranexamic acid and its derivatives, gentisic acid, homogentisate, methyl gentisate or homogentisate, dioic acid, D calcium panthetin sulfonate, lipoic acid, ellagic acid, vitamin B3, linoleic acid and its derivatives, ceramides and their counterparts, plant derivatives such as chamomile, bearberry, family of aloe (vera, ferox, bardensis), mulberry, skullcap; a water of kiwi fruit (Actinidia chinensis) marketed by Gattefosse, an extract of Paeonia suffructicosa root such as that marketed by the company Ichimaru Pharcos under the name Botanpi Liquid B®, a brown sugar extract (Saccharum officinarum), such as the molasses extract marketed by Taiyo Kagaku under the name Molasses Liquid, without this list being exhaustive.

dermorelaxing or dermodecontracting agents Mention may be made, for example, of manganese gluconate and other salts, adenosine, alverine citrate and its salts, glycine, an extract of Iris pallida, a hexapeptide (Argériline R from Lipotec) or sapogenins as the Wild yam and carbonyl amines described in the application EP1484052. Examples of sapogenins that may be mentioned are those described in the patent application WO02 / 47650, in particular Wild yam, diosgenin extracted in particular from Dioscorea opposita or any extract containing, naturally or after treatment, one or more sapogenins (wild yam rhizome, agave leaf which contains hecogenin and tigogenin, lily extract and more particularly Yacca or smilax containing smilageine and sarsapogenin, or sarsaparilla root) or Actigen Y from Actives Organics; or ginger. DMAE (dimethyl MEA), extracts of sea fennel, Montpellier rockrose, helicryse, anise, Para cress, an Acmella Oleracea extract such as Gatuline® expression of Gattefossé may also be mentioned.

Anti-2-glycation agents By "anti-glycation agent" is meant a compound that prevents and / or decreases the glycation of skin proteins, in particular dermal proteins, such as collagen.

As anti-glycation agents, mention may in particular be made of plant extracts of the family Ericaceae, such as an extract of blueberry (Vaccinium angusfifollium, Vaccinium myrtillus), for example that sold under the name "BLUEBERRY HERBASOL EXTRACT PG" by the COSMETOCHEM company, ergothioneine and its derivatives, hydroxystilbenes and their derivatives, such as resveratrol and 3,3 ', 5,5'-tetrahydroxystilbene (these anti-glycation agents are described in applications FR 2 802 425, FR 2,810,548, FR 2,796,278 and FR 2,802,420, respectively), dihydroxystilbenes and their derivatives, arginine and lysine polypeptides, such as the product sold under the name Amadorine® by the company Solabia, the hydrochloride. carcinine (marketed by Exsymol under the name "ALISTIN®"), an extract of Helianthus annuus such as Antiglyskin® from Silab, wine extracts such as white wine powder extract on maltodextrin support ven under the name "Dehydrated white wine 2F" by Givaudan, thioctic acid (or alpha lipoic acid), a mixture of bearberry extract and marine glycogen such as Aglycal LS 8777® from Laboratoires Sériobiologiques, a black tea extract such as Sederma Kombuchka® and their mixtures.

Agents stimulating the synthesis of dermal and / or epidermal macromolecules and / or preventing their degradation Among the active agents stimulating the macromolecules of the dermis or preventing their degradation, mention may be made of those which act either on the synthesis of collagen, such as extracts of Centella asiatica, asiaticosides and derivatives; ascorbic acid or vitamin C and its derivatives; synthetic peptides such as iamin, the biopeptide CL or palmitoyloligopeptide marketed by SEDERMA; peptides extracted from plants, such as the soy hydrolyzate marketed by the company Coletica under the trade name Phytokine®; rice peptides such as Nutripeptide® from SILAB, methylsilanol mannuronate such as Algisium C® marketed by Exsymol; plant hormones such as auxins and lignans folic acid; and an extract of Medicago sativa (alfafa) such as that marketed by SILBA under the name Vitanol®; a peptide extract of hazelnut such as that marketed by Solabia under the name Nuteline C®; and arginine; or on inhibiting the degradation of collagen, in particular agents acting on the inhibition of metalloproteinases (MMP) such as, more particularly, MMPs 1, 2, 3, 9. There may be mentioned: retinoids and derivatives, extracts of medicago sativa such as Vitanol® from Silab, an extract of aphanizomenon flos-aquae (cyanophyceae) marketed under the name Lanablue® by Atrium Biotechnologies, oligopeptides and lipopeptides, lipoamino acids, the malt extract marketed by the company Coletica under the trade name Collalift®; extracts of blueberry or rosemary; lycopene isoflavones, their derivatives or plant extracts containing them, in particular extracts of soya (marketed for example by the company Ichimaru Phacos under the trade name Flavosterone SB®), red clover, flax, kakkon; an extract of lychee such as the extract of lychee pericarp marketed by Cognis under the name Litchiderm LS 9704®; dipalmitoylhydroxyproline marketed by Seppic under the name SEPILIFT DPHP®, Baccharis genistelloide or Baccharine marketed by SILAB, a moringa extract such as Arganyl LS 9781® from Cognis; the sage extract described in application FR-A-2812544 of the labiate family (salvia officinalis from Flacksmann), the Rhododendron extract, the blueberry extract, a vaccineium myrtillus extract such as those described in the application FR-A-2814950; or on the synthesis of molecules belonging to the family of elastins (elastin and fibrillin), such as: retinol and derivatives, in particular retinol palmitate; the extract of Saccharomyces Cerivisiae sold by the company LSN under the trade name Cytovitin® and the extract of the alga Macrocystis pyrifera marketed by the company SECMA under the trade name Kelpadelie®; a peptide extract of hazelnut such as that marketed by Solabia under the name Nuteline C®; or on the inhibition of the degradation of elastin, such as the peptide extract of seeds of Pisum sativum marketed by the company LSN under the name Parelastyl®; heparinoids; and the N-acylaminoamide compounds described in WO 01/94381 such as {2- [acetyl- (3-trifluoromethyl-phenyl) -amino] -3-methyl-butyrylamino] acetic acid, otherwise referred to as N- [N- acetyl, N '- (3-trifluoromethyl) phenyl valyl] glycine or N-acetyl-N- [3- (trifluoromethyl) phenyl] valylglycine or acetyl trifluoromethyl phenyl valylglycine, or an ester thereof with a C1-alcohol C6. ; an extract of rice peptides such as Pentapharm's Colhibin®, or an extract of Phyllanthus emblica such as Rona Emblica®; or on the synthesis of glycosaminoglycans, such as the product of fermentation of milk with lactobacillus vulgaris, marketed by BROOKS under the trade name Biomin yogourth®; the extract of the brown alga Padina pavonica marketed by ALBAN MULLER under the trade name HSP3®; the Saccharomyces cerevisiae extract available in particular from the company Silab under the trade name Firmalift® or from the company LSN under the trade name Cytovitin®. ; an extract of Laminaria ochroleuca such as Laminaïne® from Secma; Mamaku essence from Lucas Meyer, a watercress extract (Odraline® from Silab); or on the synthesis of fibronectin, such as the Salina zooplankton extract sold by Seporga under the trade name GP4G®; the yeast extract available in particular from ALBAN MULLER under the trademark Drieline®; and the palmitoyl pentapeptide marketed by SEDERMA under the tradename Matrixil®.

Among the active agents stimulating epidermal macromolecules, such as fillagrine and keratins, mention may be made in particular of the lupine extract marketed by Silab under the trade name Structurine®; the extract of beech buds Fagus sylvatica marketed by Gattefosse under the trade name Gatuline® RC; and Salina zooplankton extract marketed by SEPORGA under the name GP4G®; the copper tripeptide of PROCYTE; a peptide extract of Voandzeia substerranea such as that marketed by Laboratoires Sérobiologiques under the trademark Filladyn LS 9397®.

As preferred active agents stimulating the synthesis of dermal and / or epidermal macromolecules and / or preventing their degradation, mention may be made of synthetic peptides such as iamin, the biopeptide CL or palmitoyloligopeptide marketed by SEDERMA; peptides extracted from plants, such as the soy hydrolyzate sold by the company Coletica under the name Phytokine®; rice peptides such as Nutripeptide® from SILAB, methylsilanol mannuronate such as Algisium CO marketed by Exsymol; folic acid; an extract of Medicago sativa (alfafa) such as that marketed by SILBA under the name Vitanol®; a peptide extract of hazelnut such as that marketed by Solabia under the name Nuteline C®; arginine; an extract of aphanizomenon flos-aquae (cyanophyceae) sold under the name Lanablue® by Atrium Biotechnologies, the malt extract marketed by the company Coletica under the name Collalift®; lycopene; an extract of lychee; moringa extract such as Cognis Arganyl LS 9781®; an extract of vaccinium myrtillus such as those described in application FR-A-2814950; retinol and derivatives, in particular retinyl palmitate; {2- [acetyl- (3-trifluoromethyl-phenyl) -amino] -3-methyl-butyrylamino} acetic acid, otherwise known as N- [N-acetyl, N '- (3-trifluoromethyl) phenyl valyl] glycine; N-acetyl-N- [3- (trifluoromethyl) phenyl] valyl-glycine or acetyl trifluoromethyl phenyl valylglycine, or an ester thereof with a C1-C6 alcohol. ; an extract of rice peptides such as Pentapharm's Colhibin®, or an extract of Phyllanthus emblica such as Rona Emblica®; the extract of the brown alga Padina pavonica marketed by ALBAN MÜLLER under the trade name HSP3®; the Saccharomyces cerevisiae extract available in particular from the company Silab under the trade name Firmalift® or from the company LSN under the trade name Cytovitin®. ; an extract of Laminaria ochroleuca such as Laminaïne® from Secma; the Mamaku essence of Lucas Meyer, the lupine extract marketed by Silab under the trade name Structurine®; the extract of beech buds Fagus sylvatica marketed by Gattefosse under the trade name Gatuline® RC.

Agents stimulating the proliferation of fibroblasts or keratinocytes and / or the differentiation of keratinocytes The fibroblast proliferation stimulating agents that can be used in the composition according to the invention may for example be chosen from plant proteins or polypeptides, extracted especially from soybean (for example a soy extract marketed by the company LSN under the name Eleseryl SH-VEG 8® or sold by the company SILAB under the trade name Raffermine®); an extract of hydrolysed soy protein such as RIDULISSE® from SILAB; and plant hormones such as giberrellins and cytokinins; a peptide extract of hazelnut such as that marketed by Solabia under the name Nuteline C®.

Preferably, an agent promoting proliferation and / or differentiation of keratinocytes will be used.

The agents stimulating the proliferation of keratinocytes that can be used in the composition according to the invention include in particular adenosine; phloroglucinol, hydrangea macrophylla leaf extract such as Ichimaru Pharcos Amacha liquid E®, a yeast extract such as CLR Stimoderm®, Larrea divaricata extract such as Sederma Capislow®, mixtures of extracts of papaya, olive leaves and lemon such as Xyléine® from Vincience, hydrangea macrophylla leaf extract such as Amacha liquid E® from Ichimaru Pharcos, retinol and its esters including retinyl palmitate, phloroglucinol, walnut cake extracts marketed by Gattefosse and extracts of solanum tuberosum such as Dermolectin® marketed by Sederma.

Among the agents stimulating the differentiation of keratinocytes include, for example, minerals such as calcium; sea fennel, a peptide extract of lupine such as the product marketed by SILAB under the trademark Structurine®, sodium betasitosteryl sulphate, such as the product marketed by Seporga under the trade name Phytocohesine®, a water-soluble corn extract such as that marketed by SOLABIA under the trade name Phytovityl®; a peptide extract of Voandzeia substerranea such as that marketed by Laboratoires Sérobiologiques under the trademark Filladyn LS 9397®; and lignans such as secoisolariciresinol, retinol and its esters, including retinyl palmitate.

As agents stimulating the proliferation and / or differentiation of keratinocytes, there may be mentioned also estrogens such as estradiol and homologues; cytokines.

As active agents stimulating the proliferation of fibroblasts or keratinocytes and / or the differentiation of the preferred keratinocytes, mention may be made of plant proteins or polypeptides, extracted especially from soybeans (for example a soybean extract marketed by the company LSN under the name Eleseryl SH-VEG 8® or sold by the company SILAB under the trade name Raffermine®); an extract of hydrolysed soy protein such as RIDULISSE® from SILAB; a peptide extract of hazelnut such as that marketed by Solabia under the name Nuteline C®; adenosine; phloroglucinol, a yeast extract such as Stimoderm® from CLR; a peptide extract of lupine such as that marketed by Silab under the trade name Structurine®; a water-soluble corn extract such as that marketed by the company SOLABIA under the trade name Phytovityl®; a peptide extract of Voandzeia substerranea such as that marketed by Laboratoires Sérobiologiques under the trademark Filladyn LS 9397®; retinol and its esters including retinyl palmitate. agents for promoting the maturation of the horny envelope It will be possible to use in the compositions of the invention agents which mediate the maturation of the horny envelope which alters with age and induces a decrease in the activity of transglutaminases . There may be mentioned, for example, urea and its derivatives and in particular Hydrovance® from National Starch and the other active agents mentioned in L'OREAL application FR2877220 (unpublished).

NO-svnthases inhibitors The agent having a NO synthase inhibiting action can be chosen from OPCs (procyanidolic oligomers); plant extracts of the Vitis vinifera species, sold in particular by the company Euromed under the name Leucocyanidines of extra grapes, or by the company Indena under the name Leucoselect®, or finally by the company Hansen under the name grape marc extract ; plant extracts of the species Olea europaea preferably obtained from olive leaves and in particular marketed by the company VINYALS in the form of dry extract, or by the company Biologia & Technologia under the trade name Eurol® BT; the extracts of a plant of the species Gingko biloba preferably a dry aqueous extract of this plant sold by Beaufour under the trade name Ginkgo biloba standard extract and mixtures thereof. Peripheral benzodiazepine receptor antagonists (PBR). For example, 1- (2-chlorophenyl) -N- (1-methylpropyl) -3-isoquinoline carboxamide; the compounds described in WO03 / 030937, WO03 / 068753, pyridazino [4,5-b] indole-1-acetamide derivatives of general formula (VII) as described in document WO00 / 44384.

agents increasing the activity of the sebaceous gland Mention may be made, for example, of methyl dehydrojasmonate, hecogenin, hedione, O-linoleyl-6D-glucose and mixtures thereof. agents stimulating the energetic metabolism of the cells The active agent stimulating the energetic metabolism of the cells may for example be chosen from biotin, a Saccharomyces Cerevisiae extract such as Sederma Phosphovital®, the mixture of sodium, manganese and zinc salts. and magnesium of pyrrolidone carboxylic acid such as Physiogenyl® from Solabia, a mixture of zinc gluconate, copper and magnesium such as Sepitonic M3® from Seppic and mixtures thereof; a beta-glucan derived from Saccharomyces Cerevisiae such as that marketed by Mibelle AG Biochemistry. - Scalp treatment agents

The agents for treating the scalp may in particular be anti-dandruff active agents, for example Zinc Pyrithione in aqueous dispersion such as Zinc Omadine Pyrithione by Arch Personal Care, or octopyrox, or ketakonazole, or selenium disulphide. , or the Tea Tree Oil.

The Applicant has been able to demonstrate that the contacting of a Zinc Pyrithione dispersion on an APTES film is accompanied by an almost immediate flocculation of the Zinc Pyrithione dispersion. Such flocculation improves the deposit of active on the scalp.

Photoprotective agents and filters In a particular embodiment, the process according to the invention is a cosmetic cosmetic process for protection against radiation, in particular against UV radiation, in which compound C is chosen from photoprotective agents, in particular from UV filters.

Organic UV filters are especially chosen from cinnamic derivatives; anthranilates; salicylic derivatives, dibenzoylmethane derivatives, camphor derivatives; benzophenone derivatives; derivatives of (3, (3-diphenylacrylate; triazine derivatives; benzotriazole derivatives; benzalmalonate derivatives, in particular those cited in US Pat. No. 5,424,663; benzimidazole derivatives; imidazolines; bisbenzoazolyl derivatives as described in US Pat. EP669323 and US 2,463,264, p-aminobenzoic acid derivatives (PABA), methylene bis (hydroxyphenyl benzotriazole) derivatives as described in US5,237,071, US 5,166,355, GB2303549, DE 197 26 184 and EP893119; the benzoxazole derivatives as described in patent applications EP0832642, EP1027883, EP1300137 and DE10162844, the screening and screening silicone polymers such as those described in particular in the application WO-93/04665, the dimers derived from α-alkylstyrene such as those described in patent application DE19855649, 4,4-diarylbutadienes as described in applications EP0967200, DE19746654, DE19755649, EP-A-1008586, EP1133980 and EP133981; merocyanine derivatives such as those described in WO04 / 006878, WO05 / 058269 and WO06 / 032741 and mixtures thereof.

As examples of complementary organic photoprotective agents, mention may be made of those designated below under their INCI name:

Cinnamic derivatives: Ethylhexyl Methoxycinnamate sold in particular under the trade name PARSOL MCX by DSM NUTRITIONAL PRODUCTS Isopropyl Methoxycinnamate Isoamyl Methoxycinnamate sold under the trade name NEO HELIOPAN E 1000 by Symrise DEA Methoxycinnamate, Diisopropyl Methylcinnamate, Glyceryl Ethylhexanoate Dimethoxycinnamate

Derivatives of dibenzoylmethane: Butyl Methoxydibenzoylmethane sold in particular under the trade name PARSOL 1789 by DSM, Isopropyl Dibenzoylmethane.

Derivatives of para-aminobenzoic acid: PABA, Ethyl PABA, Ethyl Dihydroxypropyl PABA, Ethylhexyl Dimethyl PABA sold in particular under the name "ESCALOL 507" by ISP, Glyceryl PABA, PEG-25 PABA sold under the name "UVINUL P25" by BASF

Salicylic derivatives: Homosalate sold under the name "Eusolex HMS" by Rona / EM Industries, Ethylhexyl Salicylate sold under the name "NEO HELIOPAN OS" by Symrise Dipropylene Glycol Salicylate sold under the name "DIPSAL" by SCHER, TEA Salicylate, sold under the name name "NEO HELIOPAN TS" by Symrise,

Derivatives of (3, (3-diphenylacrylate: Octocrylene sold in particular under the trade name "UVINUL N539" by BASF, Etocrylene, sold in particular under the trade name "UVINUL N35" by BASF,

Derivatives of benzophenone: Benzophenone-1 sold under the trade name Uvinul 400 by BASF, Benzophenone-2 sold under the trade name Uvinul D50 by BASF Benzophenone-3 or Oxybenzone, sold under the trade name Uvinul M40 by BASF, Benzophenone-4 sold under the trade name "UVINUL MS40" by BASF, Benzophenone-5 Benzophenone-6 sold under the trade name "Helisorb 11" by Norquay Benzophenone-8 sold under the trade name "Spectra-Sorb UV- 24 "by American Cyanamid Benzophenone-9 sold under the trade name" UVINUL DS-49 "by BASF, n-hexyl benzophenone-12 2- (4-diethylamino-2-hydroxybenzoyl) benzoate sold under the trade name" UVINUL A + Or mixed with octylmethoxycinnamate under the trade name "Uvinul A + B" by the company BASF.

Derivatives of benzylidene camphor: 3-Benzylidene camphor manufactured under the name "MEXORYL SD" by CHIMEX, 4-Methylbenzylidene camphor sold under the name "EUSOLEX 6300" by MERCK, Benzylidene Camphor Sulfonic Acid manufactured under the name "MEXORYL SL" by CHIMEX, Camphor Benzalkonium Methosulfate manufactured under the name "Mexoryl So" by Chimex, Terephthalylidene Dicamphor Sulfonic Acid manufactured under the name "Mexoryl SX" by Chimex, Polyacrylamidomethyl Benzylidene Camphor manufactured under the name "Mexoryl SW" by Chimex, derivatives of phenyl benzimidazole: Phenylbenzimidazole Sulfonic Acid sold in particular under the trade name "Eusolex 232" by Merck, Disodium Phenyl Dibenzimidazole Tetrasulfonate sold under the trade name "Neo 20 Heliopan AP" by Symrise,

Derivatives of phenyl benzotriazole: Drometrizole Trisiloxane sold under the name "Silatrizole" by Rhodia Chimie, methylene bis-benzotriazolyl tetramethylbutylphenol, sold in solid form under the trade name "MIXXIM BB / 100" by FAIRMOUNT CHEMICAL or in micronized form in aqueous dispersion under the trade name "TINOSORB M" by CIBA SPECIALTY CHEMICALS,

Triazine derivatives: 30-Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine sold under the trade name "Tinosorb S" by Ciba Geigy, Ethylhexyl Triazone sold in particular under the trade name Uvinul T150 by BASF, Diethylhexyl Butamido Triazone sold under the trade name UVASORB HEB by SIGMA 3V, 2,4,6-tris (4'-amino benzalmalonate dineopentyl) -s-triazine 2,4,6-tris- (4'-amino benzalmalonate diisobutyl) -s triazine, 2,4bis (dineopentyl 4'-aminobenzalmalonate) -6- (n-butyl 4'-aminobenzoate) -striazine, the symmetrical triazine filters described in US Pat. No. 6,225,467, WO2004 / 085412 (see compounds 6 and 9) or the document "Symetrical Triazine Derivatives" IP.COM Journal, IP.COM INC WEST HENRIETTA, NY, US (September 20, 2004) including 2,4,6-tris- (biphenyl) -1 , 3,5-triazines (especially 2,4,6-tris (biphenyl-4-yl-1,3,5-triazine and 2,4,6-tris (terphenyl) -1,3,5- triazine which is included in the patent applications WO06 / 035000, WO06 / 034982, WO06 / 034991, WO06 / 035007, WO2006 / 034992, WO2006 / 034985.

Anthranilic Derivatives: Menthyl anthranilate sold under the trade name "Neo Heliopan MA" by SYMRISE,

Imidazoline Derivatives: Ethylhexyl Dimethoxybenzylidene Dioxoimidazoline Propionate,

Derivatives of benzalmalonate: Polyorganosiloxane with benzalmalonate functions, such as Polysilicone-15 sold under the trade name "PARSOL SLX" by DSM NUTRITIONAL PRODUCTS Derivatives of 4,4-diarylbutadiene: 1,1-dicarboxy (2,2'-dimethylpropyl) -4,4-diphenylbutadiene

Benzoxazole derivatives: 2,4-bis- [5-1 (dimethylpropyl) benzoxazol-2-yl- (4-phenyl) imino] -6- (2-ethylhexyl) imino-1,3,5-triazine sold under the name Uvasorb K2A by Sigma 3V and mixtures thereof.

The preferred organic screening agents are selected from ethylhexyl methoxycinnamate ethylhexyl salicylate, homosalate, butyl methoxydibenzoylmethane octocrylene, phenylbenzimidazo sulfonic acid, benzophenone-3, benzophenone-4, benzophenone-5, 2- (4-diethylamino-2-hydroxybenzoyl) benzoate. hexyl. 4-Methylbenzylidene camphor, Terephthalylidene Dicamphor Sulfonic Acid, Disodium Phenyl Dibenzimidazole Tetrasulfonate, Methylene bis-Benzotriazolyl Tetramethylbutylphenol Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine Ethylhexyl triazone, Diethylhexyl Butamido Triazone, 2,4,6-Tris (4'-amino benzalmalonate Dineopentyl 2,4,6-tris- (4'-amino benzalmalonate diisobutyl) -s-triazine 2,4bis (dineopentyl 4'-aminobenzalmalonate) -6- (4'-aminobenzoate) butyl) -triazine, 2,4,6-tris (biphenyl-4-yl-1,3,5-triazine 2,4,6-tris (terphenyl) -1,3,5-triazine Drometrizole Trisiloxane Polysilicone- 1,1-Dicarboxy (2,2'-dimethyl-propyl) -4,4-diphenylbutadiene 2,4-bis- [5-1 (dimethylpropyl) benzoxazol-2-yl- (4-phenyl) imino] - 6- (2-ethylhexyl) imino-1,3,5-triazine and mixtures thereof.

The inorganic UV filters used in accordance with the present invention are metal oxide pigments. More preferably, the inorganic UV filters of the invention are metal oxide particles having an average element particle size of less than or equal to 500 nm, more preferably between 5 nm and 500 nm, and even more preferentially between 10 nm. and 100 nm, and preferably between 15 and 50 nm.

They may in particular be chosen from titanium, zinc, iron, zirconium and cerium oxides or mixtures thereof.

Such metal oxide pigments, coated or uncoated are in particular described in patent application EP-A-0 518 773. As commercial pigments can be mentioned the products sold Kemira, Tayca, Merck and Degussa. The metal oxide pigments may be coated or uncoated.

The coated pigments are pigments which have undergone one or more surface treatments of a chemical, electronic, mechanochemical and / or mechanical nature with compounds such as amino acids, beeswax, fatty acids, fatty alcohols, anionic surfactants, lecithins, sodium, potassium, zinc, iron or aluminum salts of fatty acids, metal alkoxides (of titanium or aluminum), polyethylene, silicones, proteins (collagen, elastin ), alkanolamines, silicon oxides, metal oxides or sodium hexametaphosphate. The coated pigments are more particularly silica-coated titanium oxides such as the product "SUNVEIL" from the company IKEDA, silica and iron oxide such as the product "SUNVEIL F" from the company IKEDA, silica and alumina such as the products "MICROTITANIUM DIOXIDE MT 500 SA" and "MICROTITANIUM DIOXIDE MT 100 SA" from the company TAYCA, "TIOVEIL" from the company TIOXIDE, alumina such as the products "TIPAQUE TTO-55 (B) "and" TIPAQUE TTO-55 (A) "from the company ISHIHARA, and" UVT 14/4 "from the company KEMIRA, - alumina and aluminum stearate such as the products" MICROTITANIUM DIOXIDE 30 MT 100 T, MT 100 TX, MT 100 Z, MT-01 "from the company TAYCA, the products" Solaveil CT-10 W "and" Solaveil CT 100 "from the company UNIQEMA and the product" Eusolex T-AVO from the company MERCK, silica, alumina and alginic acid such as the product "MT-100 AQ" from the company TAYCA, 10-alumina and aluminum laurate such as the product "MICR" OTITANIUM DIOXIDE MT 100 S "from the company TAYCA, iron oxide and iron stearate such as the product" MICROTITANIUM DIOXIDE MT 100 F "from the company TAYCA, zinc oxide and zinc stearate such as that the product "BR 351" from TAYCA, - silica and alumina and treated with a silicone such as the products "MICROTITANIUM DIOXIDE MT 600 SAS", "MICROTITANIUM DIOXIDE MT 500 SAS" or "MICROTITANIUM DIOXIDE MT 100 SAS from the company TAYCA, silica, alumina, aluminum stearate and treated with a silicone such as the product "STT-30-DS" from the company TITAN KOGYO, silica and treated with a silicone such as the product "UV-TITAN X 195" from the company KEMIRA, of alumina and treated with a silicone such as the products "TIPAQUE TTO-55 (S)" from the company ISHIHARA, or "UV TITAN M 262" of the company KEMIRA, 15 - of triethanolamine such as the product "STT-65-S" from the company TITAN KOGYO, - stearic acid such as the product "TIPAQUE T TO-55 (C) "of the company ISHIHARA, sodium hexametaphosphate such as the product" MICROTITANIUM DIOXIDE MT 150 W "from the company TAYCA. the TiO 2 treated with octyl trimethyl silane sold under the trade name "T 805" 20 by the company Degussa Silices, the TiO 2 treated with a polydimethylsiloxane sold under the trade name "70250 Cardre UF TiO2SI3" by CARDRE, the anatase / rutile TiO2 treated with a polydimethylhydrogensiloxane sold under the trade name "MICRO TITANIUM DIOXIDE USP GRADE 25 HYDROPHOBIC" by the company COLOR TECHNIQUES.

The uncoated titanium oxide pigments are for example sold by the company Tayca under the trade names "MICROTITANIUM DIOXIDE MT 500 B" or "MICROTITANIUM DIOXIDE MT600 B", by the company DEGUSSA under the name "P 25", by the company WACKHER under the name "transparent titanium oxide PW", by the company MIYOSHI KASEI under the name "UFTR", by the company TOMEN under the name "ITS" and by the company TIOXIDE under the name "TIOVEIL AQ".

The uncoated zinc oxide pigments are, for example: those marketed under the name "Z-cote" by the company Sunsmart; those marketed under the name "Nanox" by Elementis; those marketed under the name "Nanogard WCD 2025" by Nanophase Technologies;

The coated zinc oxide pigments are, for example: those marketed under the name "Zinc Oxide CS-5" by the company Toshibi (ZnO coated with polymethylhydrogenosiloxane); those marketed under the name "Nanogard Zinc Oxide FN" by Nanophase Technologies (as a 40% dispersion in Finsolv TN, C12-C15 alcohol benzoate); those marketed under the name "DAITOPERSION ZN-30" and "DAITOPERSION Zn-50" by Daito (dispersions in cyclopolymethylsiloxane / polydimethylsiloxane oxyethylenated, containing 30% or 50% of zinc nano-oxides coated with silica and polymethylhydrogeniloxane; ); those marketed under the name "NFD Ultrafine ZnO" by the company Daikin (ZnO coated with perfluoroalkyl phosphate and a copolymer based on perfluoroalkylethyl dispersed in cyclopentasiloxane); those marketed under the name "SPD-Z1" by Shin-Etsu (ZnO coated with silicone-grafted acrylic polymer, dispersed in cyclodimethylsiloxane); those marketed under the name "Escalol Z100" by the company ISP (ZnO treated alumina and dispersed in the mixture methoxycinnamate ethylhexyl / PVP-hexadecene copolymer / methicone); those marketed under the name "Fuji ZnO-SMS-10" by the company Fuji Pigment (ZnO coated with silica and polymethylsilsesquioxane); those marketed under the name "Nanox Gel TN" by Elementis (ZnO dispersed at 55% in C12-C15 alcohols benzoate with hydroxystearic acid polycondensate).

The uncoated cerium oxide pigments may be, for example, those sold under the name "COLLOIDAL CERIUM OXIDE" by the company RHONE POULENC. Uncoated iron oxide pigments are for example sold by ARNAUD under the names "NANOGARD WCD 2002 (FE 45B)", "NANOGARD IRON FE 45 BL AQ", "NANOGARD FE 45R AQ," NANOGARD WCD 2006 ( FE 45R) ", or by the company MITSUBISHI under the name" TY-220 ".

The coated iron oxide pigments are for example sold by ARNAUD under the names "NANOGARD WCD 2008" (FE 45B FN) "," NANOGARD WCD 2009 (FE 45B 556) "," NANOGARD FE 45 BL 345 "," NANOGARD FE 45 BL ", or by the company BASF under the name" OXIDE OF CLEAR IRON ".

Mention may also be made of mixtures of metal oxides, in particular titanium dioxide and cerium dioxide, including the titanium dioxide / silica-coated cerium-aluminum alloy mixture sold by the company IKEDA under the name "SUNVEIL A". ", as well as the mixture of titanium dioxide and zinc dioxide coated with alumina, silica and silicone such as the product" M 261 "sold by the company KEMIRA or coated with alumina, silica and glycerin such as that the product "M 211" sold by KEMIRA.

According to the invention, titanium oxide pigments, coated or uncoated, are particularly preferred.

The photoprotective system according to the invention is preferably present in the compositions according to the invention at a content ranging from 0.1% to 40% by weight and in particular from 5% to 25% by weight, relative to the total weight of the composition.

- Odour

It is possible to impart to the skin an odor of using odorant C molecules, whose odor character can be deactivated by fixation but which can be released from the material resulting from the condensation of A over time, thus regenerating their character. fragrant. The release may be progressive over time, it is possible to benefit from an extended odor effect. Compound C may typically be selected from aldehyde compounds such as terpene aldehyde derivatives or ketones, for example menthone, citronellal or citral.

Fragrances are compositions containing in particular the raw materials described in S. Arctander, Perfume and Flavor Chemicals (Montclair, NJ, 1969), in S. Arctander, Perfume and Flavor Materials of Natural Origin (Elizabeth, NJ, 1960) and in " Flavor and Fragrance Materials - 1991 ", Allured Publishing Co. Wheaton, Ill. It may be natural products (essential oils, absolutes, resinoids, resins, concretes) and / or synthetic) more particularly comprising at least one aldehyde compound and / or a ketone compound, saturated or unsaturated, aliphatic or cyclic.

According to the definition given in the International Standard ISO 9235 and adopted by the European Pharmacopoeia Commission, an essential oil is a fragrant product generally of complex composition, obtained from a botanically defined plant raw material, either by training in the water vapor, either by dry distillation or by a suitable mechanical process without heating (cold expression). The essential oil is most often separated from the aqueous phase by a physical process that does not cause a significant change in the composition.

Essential oils are usually volatile and liquid at room temperature, which differentiates them from so-called fixed oils. They are more or less colored and their density is in general lower than that of water. They have a high refractive index and most deflect polarized light. They are liposoluble and soluble in the usual organic solvents, entrainable with water vapor, very little soluble in water.

Among the essential oils that may be used according to the invention, mention may be made of those obtained from plants belonging to the following botanical families:

Abietaceous or Pinaceae: conifers Amaryllidaceae Anacardiaceae 30 Anonaceae: ylang ylang Apiaceae (for example umbelliferae): dill, angelica, coriander, sea fennel, carrot, parsley Arachnieae Aristolochiae5 Asteraceae: achilea, mugwort, chamomile, helichryse Betulaceae Brassicaceae Burseraceae: incense Caryophyllaceae Canellaceae Césalpiniaceae: Copaïfera (Copahu) Chenopodaceae Cistaceae: Rockrose Cyperaceae Dipterocarpaceae Ericaceae: Wintergreen Euphorbiaceae Fabaceae Geraniaceae: geranium Guttifera Hamamelidaceae Hernandiaceae Hypericaceae: St. John's wort Iridaceae Juglandaceae Lamiaceae: thyme, oregano, shrimps, savory, basil, marjoram, mint, patchouli, lavender , sage, catnip, rosemary, hyssop, lemon balm, rosemary Lauraceae: ravensara, laurel, rosewood, cinnamon, bedsea Liliaceae: garlic Magnoliaceae: magnolia Malvaceae Meliaceae Moniiacea Moraceae: hemp, hops Myricaceae Mys risticaceae: nutmeg Myrtaceae: eucalyptus, tea tree, niaouli, cajeput, backousia, clove, myrtle Oléacées Piperaceae: pepper Pittosporaceae Poaceae: lemongrass, lemongrass, vetiver Polygonaceae Renonculaceae Rosaceae: roses Rubiaceae Rutaceae: all citrus Salicaceae Santalaceae: sandalwood Saxifragaceae Schisandraceae Styracaceae: benjoin Thymelaceae: agarwood Valiaceraceae: valerian, nicotine Verbenaceae: lantana, verbena Violaceae Zingiberaceae: galanga, turmeric, cardamom, ginger Zygophyllaceae

We can also mention the essential oils extracted from flowers (lily, lavender, rose, jasmine, yilang-ylang, neroli), stems and leaves (patchouli, geranium, petit-grain), fruits (coriander, anise, cumin, juniper), fruit peel (bergamot, lemon, orange), roots (angelica, celery, cardamom, iris, acore, ginger), wood (pine wood, sandalwood, guaiac, rose cedar, camphor), d herbs and grasses (tarragon, rosemary, basil, lemon grass, sage, thyme), needles and branches (spruce, fir, pine, dwarf pine), resins and balms (galbanum, elemi, benzoin, myrrh , oliban, opopanax).

Examples of perfuming substances include: alpha-hexylcinnamaldehyde, 2-methyl-3- (p-tert-butylphenyl) propanal, 2-methyl-3- (p-isopropylphenyl) propanal, 3- (ptert) butylphenyl) -propanal, 2,4-dimethylcyclohex-3-enyl-carboxaldehyde, 4- (4-hydroxy-4-methylpentyl) -3-cyclohexenecarboxaldehyde, 4- (4-methyl-3-pentenyl) -3 cyclohexenecarboxaldehyde, 4-acetoxy-3-pentyl-tetrahydropyran, 3-carboxymethyl-2-pentylcyclopentane, 2-n-4-heptylcyclopentanone, 3-methyl-2-pentyl-2-cyclopentenone, menthone, carvone , tagetone, geranyl acetone, n-decanal, n-dodecanal, 9-decenol-1, phenylacetaldehyde dimethylacetal, phenylacetaldehyde diethylacetal, citral, citronellal, hydroxycitronellal, damascone, ionones, methylionones, isomethylionones, solanone, irones, macrocyclic ketones, muscsmacrolactones, ethylene brassylate and mixtures thereof.

According to a preferred embodiment of the invention, a mixture of different perfuming substances is used which generate in common a pleasant note for the user. The fragrant substances are preferably chosen so that they produce notes (head, heart and base) in the following families: citrus fruits, aromatics, floral notes, spices, woods, gourmands, chypre , 20 ferns, leather, musks.

Compound A (or the set of compounds A) and compound C are selected according to the property (or properties) that is to be imparted to the skin.

According to a particular embodiment of the invention, compound A is an alkoxysilane with primary amine capture function and compound C is a molecule carrying a function capable of reacting with a free amine. In a preferred embodiment of the invention, compound A is APTES and compound C is selected from the group consisting of DHA, cinnamaldehyde (or cinammaldehyde), mexoryl SX (INCI: terephthalylidene dicamphor). sulfonic acid), zinc pyrithione, vitamin C, citronellal, citral, nonanal, hydroxycitronellal and a polymer of maleic anhydride. According to a particularly preferred embodiment, compound A is APTES and compound C is DHA.

The process according to the invention comprises the application on the skin of a compound or set of compounds A which can condense, in particular when it is subjected to an increase in concentration obtained by evaporation of the medium containing it. The compound or set of compounds A therefore has reactive functions to allow this condensation, as mentioned above.

This condensation results in the formation of a deposit on and / or in the skin. This deposit is not necessarily continuous but may consist of a multitude of related fields. The compound A is chosen so that the material resulting from its condensation has reactive functions called "free capture functions". A compound C of cosmetic interest is also applied to the skin.

Compound C can react with the product of the condensation of A, via the free capture function FA after condensation, and a function Fc present on the compound C.

The method according to the invention comprises the sequential or concomitant application of compound A (or set of compounds A) and compound C.

In one embodiment of the invention, Compound A (or set of Compounds A) is first applied to an area of the skin. Then, after a longer or shorter time which can be between 1 minute and 5 hours, preferably from 1 minute to 1 hour, even more preferably between 2 and 10 minutes, the compound C is applied to the same zone of the skin. In this embodiment, the condensation of compound A (or of compound set A) may have occurred spontaneously, or was triggered, prior to the application of compound C. Compound C may then react on the condensate through the free capture function (s) on the condensate. Compound C may also react with one or more reactive functions different from capture functions, particularly with reactive functions that could have participated in the reaction of A with itself but unreacted.

Thus, in the particular case where compound A is an organosilane carrying a capture function, it is understood that compound C can react on the capture function as well as on uncondensed silanols of the condensate.

A chemical reaction then occurs, with formation of covalent bonds between C and one or more reactive functions, more particularly with the capture functions FA 10 present on the condensate of compound A or of the set of compounds A.

The invention can be implemented with the use of processes accelerating or inhibiting the reactions used in the invention and / or the diffusion of the molecules in the skin, for example heat or cold, microwaves, agents pH or catalysts. It is also possible to act from the surface of the skin on the reaction between compound C and the compound or set of compound A, for example to control or make it faster.

According to a variant of the process according to the invention, the compound A is first applied and then the condensation reaction of A is expected to take place. This may be fast or slow, whether or not to involve drying the skin, whether or not to involve activation with, for example, use of a heat source or other energy source. At this stage, the compound C can be applied, or the compound C is then rinsed and applied. The compound C can be allowed to react with the material resulting from the condensation of A. The reaction between A and C can also be activated. between A and C, rinse or not.

According to a particular embodiment, the compound A is applied in a form or under conditions that do not allow the condensation reaction. Compound A is expected to enter. Then the reaction is triggered, either by adding an adjuvant (for example a pH agent) or by changing the conditions, for example by changing the temperature (in particular by increasing it). Once condensation has begun, and possibly after a rinsing step, compound C is applied as before. In another variation, compound A or the set of compounds is applied, then compound C is applied under conditions where the capture reaction can not take place. The condensation takes place. Once condensation has begun, the reaction of compound C is initiated on the condensate of A. In a particular embodiment, compounds A and C are mixed before application to the skin. This mixture can be done before application or during application on the skin (mixture directly on the area of the skin to be treated).

Compound A (or the set of compounds A) and compound C can therefore be applied concomitantly. In this case, the compounds A and C are chosen so that the presence of C does not prevent the condensation of A; or - the compounds A and C and / or the operating conditions are selected so that the condensation of A is faster than the C reaction; or - compound A can condense while compound C can not react. After a certain time, the reaction of C is triggered by a subsequent action or automatically, for example by changing pH, temperature or by applying a light source. In a particular embodiment, the result of the condensation of A on the skin is applied. For example, a film of poly APTES can be applied. Compound C is then applied.

In another embodiment, compound C is first applied and then compound A is applied.

In a particular embodiment of the invention, it is also possible to inject the compound A (or the set of compounds A) and / or the compound C into the skin. For example, compound A (or set of compounds A) can be injected, then compound C is applied, or compound A (or combination of compounds A) is applied and then compound C is injected, or the compounds A (or the set of compounds A) and C.5 are injected. In this configuration, the invention serves, for example, to create a new tattooing mode. Compound A is injected. Then, a compound C can be applied, by reaction with the capture function, to give a decorative pattern.

Subsequently, if the drawing is erased or erased, as the capture layer remains trapped on and / or in the skin, it is possible to repeat the operation to reproduce the same decorative pattern, or to create a new pattern .

In general, reactions can be accelerated by the use of suitable catalysts, for example pH agents, salts, metals and / or enzymes.

The subject of the present invention is also the joint use of a cosmetic composition containing an effective amount of a compound A capable of condensing in situ on the skin and of a cosmetic composition containing an effective amount of a compound C which is will react with one or more free reactive functions of the material resulting from the condensation of compound A. The compositions are for example in the form of a serum, a lotion, a direct emulsion (O / W) inverse ( E / H) or multiple (H / E / H and E / H / E), a stick or a compact product. They can use compartmentalization systems (two incompatible solvents, encapsulation). These systems make it possible, for example, to place in the same product compound A, or the set of compounds A, and compound C by limiting their interaction.

Galenic forms

Compound A, or the set of Compound A, and Compound C may be formulated in compositions containing a physiologically acceptable medium. These compositions may be in any of the galenic forms conventionally used in the intended application. Of course, those skilled in the art will take care to choose the components and any additional ingredients and / or active agents, and / or their quantity, in such a way that the advantageous properties of the compound A (or the set of compounds A) and of the compound C, are not, or not substantially, impaired by the addition envisaged.

In a particular embodiment, the compositions used according to the invention are aqueous compositions.

Formulation for coloring, especially for a self-tanning effect

The compositions containing compound C used for dyeing the skin, in particular to obtain a self-tanning effect, may be prepared according to the techniques well known to those skilled in the art, in particular those intended for the preparation of oil-in-water or water-in-oil emulsions.

This composition may be in particular in the form of an emulsion, simple or complex (O / W, W / O, O / W / H or W / O / W) such as cream, milk or in the form of a gel or a cream gel, in the form of a lotion, powder, solid stick and optionally be packaged in an aerosol and be in the form of foam or spray.

Preferably, the compositions according to the invention are in the form of an oil-in-water or water-in-oil emulsion.

In the case of an emulsion, the aqueous phase thereof may comprise a nonionic vesicular dispersion prepared according to the known methods (Bangham, Standish and Watkins, J. Mol Biol 13, 238 (1965)). FR 2 315 991 and FR 2 416 008).

In a particular embodiment, the compound C is DHA. The latter may be used in free form and / or encapsulated for example in lipid vesicles such as liposomes, in particular described in application WO 97/25970. The self-tanning compositions according to the invention may be in the form of creams, milks, gels, gel-creams, oil-in-water emulsions, vesicular dispersions, fluid lotions, in particular fluid lotions. vaporizers or any other form generally used in cosmetics, in particular those usually suitable for self-tanning cosmetic compositions.

The compositions in accordance with the present invention may furthermore comprise conventional cosmetic adjuvants, chosen in particular from fatty substances, organic solvents, ionic or nonionic thickeners, softeners, antioxidants, anti-free radical agents, opacifiers, stabilizers , emollients, silicones, ahydroxyacids, anti-foam agents, moisturizing agents, vitamins, insect repellents, substance P antagonists, anti-inflammatories, fragrances, preservatives, surfactants, fillers, polymers, propellants, alkanizing or acidifying agents, and additional dyes (in addition to compound C used according to the invention), or any other ingredient usually used in the cosmetics and / or dermatological field, particularly for the manufacture of self-tanning compositions in the form of emulsions. These cosmetic adjuvants may be incorporated into the composition containing A, in the composition containing compound C, or in both compositions. The fatty substances may consist of an oil or a wax or mixtures thereof. By "oil" is meant a liquid compound at room temperature. By "wax" is meant a compound that is solid or substantially solid at room temperature, and whose melting point is generally greater than 35 ° C.

As oils, mention may be made of mineral oils (paraffin); vegetable (sweet almond oil, macadamia oil, blackcurrant seed oil, jojoba oil); synthetic such as perhydrosqualene, alcohols, acids or fatty esters (such as the benzoate of C12-C15 alcohols sold under the trade name Finsolv TN by the company Finetex, octyl palmitate, isopropyl lanolate triglycerides, including those of capric / caprylic acids, oxyethylenated or oxypropylenated, silicone (cyclomethicone, polydimethylsiloxane or PDMS) or fluorinated esters and fatty ethers, polyalkylenes and mixtures thereof.

Waxy compounds that may be mentioned include paraffin wax, carnauba wax, beeswax and hydrogenated castor oil.

Among the organic solvents, there may be mentioned lower alcohols and polyols having not more than 8 carbon atoms.

The thickeners may be chosen in particular from crosslinked polyacrylic acids, guar gums and modified or unmodified celluloses such as hydroxypropyl guar gum, methylhydroxyethylcellulose and hydroxypropylmethylcellulose.

Additional dyes can be used to modify the color produced by the self-tanning agent.

These additional dyes may be chosen from synthetic direct dyes or natural dyes.

These additional dyes may be chosen, for example, from red or orange dyes of the fluoran type, such as those described in the patent application FR2840806. For example, the following dyes may be mentioned: tetrabromofluorescein or eosin known under the name CTFA: CI 45380 or Red 21 - phloxine B known under the name CTFA: CI 45410 or Red 27 - diiodofluorescein known under the name CTFA CI 45425 or Orange 10; dibromofluorescein known under the name CTFA: CI 45370 or Orange 5. 15 - the sodium salt of tetrabromofluoroscéine known under the name CTFA: CI 45380 (Na salt) or Red 22 - the sodium salt of phloxine B known under the CTFA name: CI 45410 (Na salt) or Red 28 - the sodium salt of diiodofluorescein known as CTFA: CI 45425 (Na salt) or Orange 11; erythrosine known under the name CTFA: CI 45430 or Acid Red 51. phloxine known under the name CTFA: CI 45405 or Acid Red 98.

These additional dyes may also be chosen from antraquinones, caramel, carmine, charcoal black, azulene blue, methoxalene, trioxalene, guajazulene, chamuzulene, bengal rose, cosine 10B, cyanosine , daphinin.

These additional dyes may also be chosen from indole derivatives such as monohydroxyindoles as described in patent FR2651126 (ie: 4-, 5-, 6- or 7-hydroxyindole) or dihydroxyindoles as described in patent EP -B-0425324 (ie: 5,6-dihydroxyindole, 2-methyl-5,6-dihydroxyindole, 3-methyl-5,6-dihydroxyindole, 2,3-dimethyl-5,6-dihydroxyindole); The additional coloring agents may also be iron oxide pigments whose average size of the elementary particles is less than 100 nm such as those described in the patent application EP 966 953.

Compositions containing a photoprotective agent (or filter), care composition

Compositions comprising a compound C used for photoprotection or skin care may be prepared according to techniques well known to those skilled in the art. It should be noted that the galenic and active forms described below can be used for the formulation of compound A, whatever the cosmetic application sought.

The compositions used according to the invention may comprise conventional cosmetic adjuvants, chosen especially from fatty substances, organic solvents, ionic or nonionic thickeners, hydrophilic or lipophilic thickeners, softeners, humectants, opacifiers, stabilizers, emollients, silicones, antifoaming agents, perfumes, preservatives, anionic, cationic, nonionic, zwitterionic or amphoteric surfactants, active ingredients, fillers, polymers, propellants, alkalizing or acidifying agents or any other ingredient usually used in the cosmetic and / or dermatological field. These cosmetic adjuvants may be incorporated into the composition containing A, in the composition containing compound C, or in both compositions.

The fatty substances may consist of an oil or a wax other than the apolar waxes as defined above or mixtures thereof. By oil is meant a liquid compound at room temperature. By wax is meant a compound that is solid or substantially solid at room temperature and whose melting point is generally greater than 35 ° C.

As oils, mention may be made of mineral oils (paraffin); vegetable (sweet almond oil, macadamia oil, blackcurrant seed oil, jojoba oil); synthetic such as perhydrosqualene, alcohols, fatty amides (such as isopropyl lauroyl sarcosinate sold under the name "Eldew SL-205" by Ajinomoto), fatty acids or esters such as C12 alcohols benzoate; -C15 sold under the trade name "Finsoly TN" or "Witconol TN" by the company WITCO, 2-ethylphenyl benzoate as the commercial product sold under the name X-TEND 226® by the company ISP, octyl palmitate isopropyl lanolate, triglycerides, including those of capric / caprylic acids, dicaprylyl carbonate sold under the name "Cetiol CC" by Cognis), oxyethylenated or oxypropylenated esters and fatty ethers; silicone oils (cyclomethicone, polydimethylsiloxane or PDMS) or fluorinated oils, polyalkylenes, trialkyl trimellitates such as tridecyl trimellitate.

As waxy compounds, mention may be made of carnauba wax, beeswax, hydrogenated castor oil, polyethylene waxes and polymethylene waxes, such as that sold under the name Cirebelle 303 by the company SASOL. Among the organic solvents, mention may be made of lower alcohols and polyols. These can be selected from glycols and glycol ethers such as ethylene glycol, propylene glycol, butylene glycol, dipropylene glycol or diethylene glycol.

As hydrophilic thickeners, mention may be made of carboxyvinyl polymers such as Carbopols (Carbomers) and Pemulen (acrylate / Cio-Cao-alkylacrylate copolymer); polyacrylamides, for example crosslinked copolymers sold under the names Sepigel 305 (CTFA name: polyacrylamide / C13-14 isoparaffin / Laureth 7) or Simulgel 600 (CTFA name: acrylamide / sodium acryloyldimethyltaurate copolymer / isohexadecane / polysorbate 80) by the company Seppic; polymers and copolymers of 2-acrylamido-2-methylpropanesulphonic acid, optionally crosslinked and / or neutralized, such as poly (2-acrylamido-2-methylpropanesulphonic acid) marketed by Hoechst under the trade name "Hostacerin AMPS" (name CTFA: ammonium polyacryloyldimethyl taurate or SIMULGEL 800 sold by the company SEPPIC 25 (CTFA name: sodium polyacryolyldimethyl taurate / polysorbate 80 / sorbitan oleate); copolymers of 2-acrylamido-2-methylpropanesulphonic acid and hydroxyethyl acrylate such as SIMULGEL NS and SEPINOV EMT 10 sold by the company SEPPIC, cellulose derivatives such as hydroxyethylcellulose, polysaccharides and in particular gums such as Xanthan gum, water-soluble or water-dispersible silicone derivatives such as acrylic silicones, polyether silicones and cationic silicones and their mixtures.

Mention may be made, as lipophilic thickeners, of synthetic polymers such as the poly C 10 -C 30 alkyl acrylates sold under the name "IPA INTELIMER 13-1" and "INTELIMER IPA 13-6" by the company Landec, or modified clays such as hectorite and its derivatives, such as the products marketed under the Bentone name.

Of course, those skilled in the art will take care to choose the optional additional compound (s) mentioned above and / or their amounts in such a way that the advantageous properties intrinsically attached to the compositions used according to the invention are not , or substantially not, altered by the addition or additions envisaged.

The compositions used for the photoprotection or care of the skin according to the invention, and the compositions containing the compound A or the set of compounds A, may be prepared according to the techniques well known to those skilled in the art. . They may be in particular in the form of an emulsion, simple or complex (O / W, W / O, O / W / H or W / O / W) such as cream, milk or cream gel ; in the form of an aqueous gel; in the form of a lotion. They may optionally be packaged in aerosol and be in the form of foam or spray.

Preferably, the compositions used according to the invention are in the form of an oil-in-water or water-in-oil emulsion. The emulsification processes that can be used are of the pale type or helix, rotor-stator and HHP.

It is also possible, by HHP (between 50 and 800b), to obtain stable dispersions with drop sizes down to 100 nm.

The emulsions generally contain at least one emulsifier chosen from amphoteric, anionic, cationic or nonionic emulsifiers, used alone or as a mixture. The emulsifiers are suitably selected depending on the emulsion to be obtained (W / O or O / W).

As emulsifying surfactants that may be used for the preparation of W / O emulsions, mention may be made, for example, of alkyl esters or ethers of sorbitan, of glycerol or of sugars; silicone surfactants such as dimethicone copolyols such as the mixture of cyclomethicone and dimethicone copolyol, sold under the name "DC 5225 C" by Dow Corning, and alkyl dimethicone copolyols such as Laurylmethicone copolyol sold under the name "Dow" Corning 5200 Formulation Aid "by Dow Corning; cetyl dimethicone copolyol such as the product sold under the name Abil EM 90R by Goldschmidt and the mixture of cetyl dimethicone copolyol, polyglycerol isostearate (4 moles) and hexyl laurate sold under the name ABIL WE 09 by the company Goldschmidt. It is also possible to add one or more coemulsifiers, which advantageously may be chosen from the group comprising the alkylated polyol esters.

Examples of alkylated polyol esters that may be mentioned include polyethylene glycol esters such as PEG-30 dipolyhydroxystearate, such as the product marketed under the name Arlacel P135 by the company ICI.

Examples of glycerol and / or sorbitan esters that may be mentioned are polyglycerol isostearate, such as the product sold under the name Isolan GI 34 by the company Goldschmidt; sorbitan isostearate, such as the product sold under the name Arlacel 987 by the company ICI; sorbitan isostearate and glycerol, such as the product sold under the name Arlacel 986 by the company ICI, and mixtures thereof.

For O / W emulsions, mention may be made, for example, as emulsifiers, of nonionic emulsifiers such as oxyalkylenated (more particularly polyoxyethylenated) fatty acid esters of glycerol; oxyalkylenated fatty acid and sorbitan esters; oxyalkylenated fatty acid esters (oxyethylenated and / or oxypropylenated) such as the PEG-100 Stearate / Glyceryl Stearate mixture marketed for example by the company ICI under the name Arlacel 165; oxyalkylenated fatty alcohol ethers (oxyethylenated and / or oxypropylenated); sugar esters such as sucrose stearate; fatty alcohol and sugar ethers, in particular alkylpolyglucosides (APG) such as decylglucoside and laurylglucoside sold, for example, by Henkel under the respective names Plantaren 2000 and Plantaren 1200, cetostearylglucoside optionally mixed with cetostearyl alcohol; , marketed for example under the name Montanov 68 by the company Seppic, under the name Tegocare CG90 by Goldschmidt and under the name Emulgade KE3302 by Henkel, and arachidyl glucoside, for example in the form of a mixture of arachidic and behenic alcohols and arachidylglucoside sold under the name Montanov 202 by the company Seppic. According to one particular embodiment of the invention, the mixture of the alkylpolyglucoside as defined above with the corresponding fatty alcohol may be in the form of a self-emulsifying composition, as described, for example, in WO- A-92/06778.

In the case of an emulsion, the aqueous phase thereof may comprise a nonionic vesicular dispersion prepared by known methods (Bangham, Standish and Watkins, J. Mol Biol 13, 238 (1965)). , FR 2 315 991 and FR 2 416 008).

The cosmetic compositions used according to the invention may for example be used as a skincare and / or sun protection product for the face and / or the body of liquid to semi-liquid consistency, such as milks, creams, or more. minus 15 unctuous, gel-creams, pasta. They may optionally be packaged in aerosol and be in the form of foam or spray.

The compositions according to the invention in the form of vaporizable fluid lotions according to the invention are applied to the skin or the scalp in the form of fine particles by means of pressurizing devices. The devices according to the invention are well known to those skilled in the art and include non-aerosol pumps or "atomizers", aerosol containers comprising a propellant and aerosol pumps using compressed air as a propellant. These are described in US Pat. Nos. 4,077,441 and 4,850,517 (which forms an integral part of the content of the description). The aerosol-conditioned compositions according to the invention generally contain conventional propellants such as, for example, hydrofluorinated compounds, dichlorodifluoromethane, difluoroethane, dimethyl ether, isobutane, n-butane, propane and trichlorofluoromethane. They are preferably present in amounts ranging from 15 to 50% by weight relative to the total weight of the composition.

The compositions used according to the invention may also comprise, in addition, additional cosmetic and dermatological active ingredients.

Among the active ingredients, mention may be made of: vitamins (A, C, E, K, PP) and their derivatives or precursors, alone or in mixtures, anti-glycation agents; the soothing agents; the NO-synthase inhibitors; agents stimulating the synthesis of dermal or epidermal macromolecules and / or preventing their degradation; agents stimulating the proliferation of fibroblasts; agents stimulating the proliferation of keratinocytes; - muscle relaxants; tensing agents, mattifying agents, keratolytic agents, desquamating agents; - Moisturizing agents such as polyols such as glycerin, butylene glycol, propylene glycol. anti-inflammatory agents; agents acting on the energetic metabolism of cells; insect repellents; antagonists of substances P or CRGP. - anti-hair loss and / or hair regrowth agents - anti-wrinkle agents.

Of course, those skilled in the art will take care to choose the optional additional compound (s) mentioned above and / or their amounts in such a way that the advantageous properties intrinsically attached to the compositions in accordance with the invention are not, or substantially, not, altered by the addition or additions envisaged.

Those skilled in the art will choose the active agent (s) depending on the desired effect on the skin. The composition may furthermore comprise at least one ingredient such as fillers with a blooming effect or agents promoting the natural coloration of the skin, intended to complete the biological effect of these active ingredients or provide an immediate visual anti-aging effect. care and / or makeup of oily skin, those skilled in the art will preferably choose at least one active agent selected from desquamating agents, sebo-regulating or anti-seborrhoeic agents, astringent agents.

The compositions used according to the invention may also comprise at least one additional ingredient intended to complete the biological effect of these active ingredients or to provide an immediate visual effect; mention may in particular be made of matting agents, blooming fillers, fluorescent agents, agents promoting the naturally rosy coloration of the skin and abrasive or exfoliating fillers.

To complement and / or optimize the effects conferred by the cosmetic and / or dermatological active agents mentioned above on keratin materials, it may be advantageous to incorporate other additional ingredients in the compositions of the invention.

In particular, these additional ingredients may confer an immediate visual effect that will be relayed by the biological effect of the assets mentioned above. They can also, through a mechanical action (eg abrasvies), amplify the effect of the biological assets mentioned above.

Matifying agents

By "matting agent" is meant agents intended to make the skin visibly duller, less glossy.

The matting effect of the agent and / or of the composition containing it can in particular be evaluated using a gonioreflectometer, by measuring the ratio R between the specular reflection and the diffuse reflection. A value of R less than or equal to 2 generally reflects a matting effect.

The matting agent may especially be chosen from a rice starch or a corn starch INCI name: ZEA MAYS (CORN) STARCH as in particular the product sold under the trade name "FARMAL CS 3650 PLUS 036500" by National Starch, kaolinite talc, pumpkin seed extract, cellulose microbeads, vegetable fibers, synthetic fibers, in particular polyamides, expanded acrylic copolymer microspheres, polyamide powders, silica powders, polytetrafluoroethylene powders , silicone resin powders, acrylic polymer powders, wax powders, polyethylene powders, elastomeric crosslinked organopolysiloxane powders coated with silicone resin, talc / titanium dioxide / alumina / silica composite powders mixed amorphous silicate powders, silicate particles, and especially mixed silicate particles, and mixtures thereof.

Examples of matting agents that may be mentioned include: rice or maize starch, in particular starch octenyl succinate aluminum sold under the name Dry Flo® by the company National Starch, kao linite; - silicas; - talc; an extract of pumpkin seeds as marketed under the name Curbilene® 15 by the company Indena; cellulose microbeads as described in patent application EP 1 562 562; fibers, such as silk, cotton, wool, flax, cellulose fibers extracted especially from wood, vegetables or algae, polyamide (Nylon®), modified cellulose, poly-p- phenylene terephtamide, acrylic, polyolefin, glass, silica, aramid, carbon, Teflon®, insoluble collagen, polyesters, polyvinyl chloride or vinylidene, polyvinyl alcohol, polyacrylonitrile, chitosan, polyurethane, polyethylene phthalate, fibers formed from a mixture of polymers, resorbable synthetic fibers, and mixtures thereof described in patent application EP 1 151 742; microspheres of expanded acrylic copolymers such as those sold by EXPANCEL under the trade names EXPANCEL 551®, fillers with optical effect as described in patent application FR 2 869 796, in particular: polyamide powders (Nylon®), such as, for example, Arkema's Orgasol type nylon 12 particles having a mean size of 10 microns and a refractive index of 1.54, silica powders, for example Silica beads SB150 from Miyoshi de average size 5 microns and refractive index 1.45, - polytetrafluoroethylene powders, such as PTFE ceridust 9205F Clariant of average size 8 microns and refractive index 1.36, - silicone resin powders as the Silicon resin Tospearl 145A of GE Silicone with a mean size of 4.5 microns and a refractive index of 1.41, the powders of acrylic copolymers, in particular of methyl poly (meth) acrylate, such as PMMA Jurym particles MBI of Nihon Junyoki of average size 8 microns and refractive index 1.49, or Micropearl M100® and F 80 ED® particles of the company Matsumoto Yushi-Seiyaku, - wax powders such as paraffin wax microease particles 114S micropowders 10 average size 7 microns and refractive index 1.54, - polyethylene powders, especially comprising at least one ethylene / acrylic acid copolymer, and in particular consist of ethylene / acrylic acid copolymers such as Flobeads particles EA 209 of Sumitomo (average size 10 microns and refractive index 1.48), elastomeric crosslinked organopolysiloxane powders coated with silicone resin, in particular silsesquioxane resin, as described, for example, in US Pat. 538 793. Such elastomer powders are sold under the names "KSP-100", "KSP-101", "KSP-102", "KSP-103", "KSP-104", "KSP-105" by SHIN ETSU, and 20 - composite powders talc / titanium dioxide / alumina / silica, such as those sold under the name Coverleaf® AR-80 by the company Catalyst & chemicals, - mixtures thereof, - compounds that absorb and / or adsorb sebum as described in the patent application FR 2 869 796. Mention may in particular be made of: silica powders, such as, for example, the porous silica microspheres sold under the name "Silica Beads SB-700" marketed by the company MYOSHI, the "SUNSPHERE® H51", " SUNSPHERE® H33 "," SUNSPHERE® H53 "marketed by ASAHI GLASS; amorphous silica microspheres coated with polydimethylsiloxane sold under the name SA Sunsphere® H-33 and SA Sunsphere® H-53 sold by the company Asahi Glass; amorphous mixed silicate powders, in particular aluminum and magnesium, such as, for example, that marketed under the name "NEUSILIN UFL2" by the company Sumitomo. polyamide (nylon®) powders, such as for example "ORGASOL® 4000" marketed by Arkema, and acrylic polymer powders, in particular polymethyl methacrylate, such as the commercially available "COVABEAD® LH85" by the company WACKHERR; polymethyl methacrylate / ethylene glycol dimethacrylate, such as, for example, "DOW CORNING 5640 MICROSPONGE® SKIN OIL ADSORBER" marketed by Dow Corning, or "Ganzpearl® GMP-0820" marketed by Ganz Chemical; allyl polymethacrylate / ethylene glycol dimethacrylate, such as for example "POLY-PORE® L200" or "POLY-PORE® E200" marketed by AMCOL; ethylene dimethacrylate copolymer lauryl glycoUmethacrylate, such as for example the "POLYTRAP® 6603" marketed from the company Dow Corning; silicate particles, such as alumina silicate; mixed silicate particles, such as: magnesium aluminum silicate particles, such as saponite or magnesium aluminum silicate, hydrated with a sodium sulphate marketed under the trademark Sumecton® by the company Kunimine; the magnesium silicate complex, hydroxyethylcellulose, black cumin oil, pumpkin oil and phospholipids or Matipure® from Lucas Meyer, and their mixtures. As preferred matting agents, it is possible to use, according to the invention, an extract of pumpkin seeds, a rice or maize starch, kaolinite, silicas, talc, polyamide powders, polyethylene powders and copolymer powders. acrylics, microspheres of expanded acrylic copolymers, silicone resin microbeads, mixed silicate particles and mixtures thereof.

Loads with a flutter effect

These fillers can be any material that can modify wrinkles by its intrinsic physical properties and mask them. These fillers can in particular modify the wrinkles by a tightening effect, a camouflage effect, or a blurring effect.

As a filler, the following compounds can be exemplified: porous silica microparticles, for example Myochi's Silica Beads® SB 150 and SB 700 of medium size of 5 μm and SUNSPHERES® series H of Asahi Glass as the H33, H51 of size respectively 3.5 and 5 microns. hollow hemispherical particles of silicone resins, such as NLK 500®, NLK 506® and NLK 510® from Takemoto Oil and Fat, in particular described in EP-A-1579849; silicone resin powders, for example SILICON Resin Tospearl® 145 A DE GE Silicone medium size 4.5μm. powders of acrylic copolymers, in particular of methyl poly (meth) acrylate, for instance the PMMA Jurimer MBI® particles of Nihon Junyoki with an average size of 8 μm, and the hollow spheres of PMMA sold under the name COVABEAD® LH 85 by the company Wackherr and expanded vinylidene / acrylonitrile / methylene methacrylate microspheres sold under the name Expancel®. wax powders such as Paraffin wax microloase® 1145 particles of 15 micropowders of average size of 7 μm. polyethylene powders, especially comprising at least one ethylene / acrylic acid copolymer, for example the FLOBEADS® EA 209 E from Sumimoto, with an average size of 10 μm. crosslinked elastomeric organopolysiloxane powders coated with silicone resin, in particular silsesquioxane under the name KSP 100®, KSP 101®, KSP 102®, KSP 103®, KSP 104® and KSP 105® by the company Shin Etsu. talc / dioxide or titanium / alumina / silica composite powders, for example the Coverleaf AR 80® from Catalyst & Chemical. talc, mica, kaolin, lauryl glycine, starch powders crosslinked with octyanyl succinate anhydride, boron nitride, polytetrafluoroethylene powders, precipitated calcium carbonate, carbonate of hydrocarbonate magnesium, barium sulfate, hydroxyapatite, calcium silicate, cerium dioxide and glass or ceramic microcapsules. synthetic or natural hydrophilic or hydrophilic fibers, mineral or organic fibers such as silk, cotton, wool, flax, cellulose fibers extracted in particular from wood, vegetables or algae, polyamide (Nylon®), modified cellulose, poly-p-phenylene terephtamide, acrylic, polyolefin, glass, silica, aramid, carbon, polytetrafluoroethylene (Teflon®), insoluble collagen, polyesters, polyvinyl chloride or vinylidene , polyvinyl alcohol, polyacrylonitrile, chitosan, polyurethane, polyethylene phthalate, fibers formed from a mixture of polymers, synthetic resorbable fibers, and mixtures thereof described in patent application EP 1 151 742. - the crosslinked silicone spherical elastomers such as Trefil 5 E-505C® or E-506 C® from Dow Corning. abrasive fillers which, by a mechanical effect, provide a smoothing of the cutaneous microrelief, such as abrasive silica, for example Abrasif SP® from Semanez or walnut or shell powders (apricot, walnut, for example from Cosmetochem).

The fillers having an effect on the signs of aging are chosen in particular from porous silica microparticles, hollow hemispherical silicone particles, silicone resin powders, acrylic copolymer powders, polyethylene powders, powders of Crosslinked elastomeric organopolysiloxanes coated with silicone resin, talc / titanium dioxide / alumina / silica composite powders, precipitated calcium carbonate, magnesium hydrocarbonate carbonate, barium sulfate, hydroxyapatite, silicate calcium, cerium dioxide and microcapsules of glass or ceramics, silk fibers, cotton, and mixtures thereof.

The charge can be a "soft focus" charge. By charge "spell-focus" means a charge which in addition gives transparency to the complexion and a fuzzy effect. Preferably, the "soft-focus" charges have an average particle size of less than or equal to 15 microns. These particles can be of any shape and in particular be spherical or nonspherical. More preferably, these fillers are non-spherical. The "sort-focus" fillers may be chosen from silica and silicate powders, in particular alumina powders, polymethyl methacrylate (PMMA) type powders, talc, silica / TiO2 or silica / zinc oxide composites, and powders. polyethylene, starch powders, polyamide powders, styrene / acrylic copolymer powders, silicone elastomers, and mixtures thereof.

In particular, mention may be made of talc with a mean size of less than or equal to 3 microns, for example talc with a mean size of 1.8 microns, and in particular that sold under the trade name Talc P3® by the company Nippon Talc. , Nylon® 12 powder, in particular that sold under the name Orgasol 2002 Extra D Nat Cos® by the company Atochem, silica particles treated on the surface with a mineral wax 1 to 2% (INCI name: hydrated silica (and) paraffin) such as those sold by the company Degussa, amorphous silica microspheres, such as those sold under the name Sunsphere, for example reference H-53® by Asahi Glass, and silica micro-beads such as those sold under the name SB-700® or SB-150® by Miyoshi, this list is not limiting.

The concentration of these fillers having an effect on the signs of aging in the compositions according to the invention may be between 0.1 and 40%, or even between 0.1 and 20% by weight relative to the total weight of the composition.

Agents Promoting Naturally Rosy Skin Coloring: The compositions used according to the invention may furthermore comprise an agent promoting the naturally rosy coloration of the skin. There may be mentioned in particular: a self-tanning agent, that is to say an agent which, applied to the skin, in particular on the face, makes it possible to obtain a tanning effect of a more or less similar appearance to that which can result from prolonged exposure to the sun (natural tanning) or under a UV lamp; an additional coloring agent, that is to say any compound having a particular affinity for the skin enabling it to confer on the latter a durable, non-covering coloration (ie not having a tendency to opacify the skin) and which is not removable with water or with the aid of a solvent, and which resists both rubbing and washing with a solution containing surfactants. Such durable coloration is therefore distinguished from the superficial and momentary coloration provided for example by a makeup pigment; and their mixtures.

Examples of self-tanning agents that may be mentioned include: dihydoxyacetone (DHA) (used in addition to a compound C for photoprotection (or filter) or skincare), erythrulose, and the combination a catalytic system formed of: salts and oxides of manganese and / or zinc, and alkaline and / or alkaline earth hydrogenocarbonates.

The self-tanning agents are generally chosen from mono or polycarbonyl compounds such as, for example, isatin, alloxane, ninhydrin, glyceraldehyde, mesotartaric aldehyde, glutaraldehyde, erythrulose, pyrazolin-4,5 derivatives. -Diones as described in patent application FR 2 466 492 and WO 97/35842, dihydroxyacetone (DHA), 4,4-dihydroxypyrazolin-5-ones derivatives as described in patent application EP 903 342. DHA will preferably be used.

DHA may be used in free form and / or encapsulated for example in lipid vesicles such as liposomes, in particular described in application WO 97/25970.

In general, the self-tanning agent is present in an amount of from 0.01 to 20% by weight, and preferably in an amount of from 0.1 to 10% of the total weight of the composition.

It is also possible to use other dyes which make it possible to modify the color produced by the self-tanning agent. These dyes may be chosen from synthetic direct dyes or natural dyes.

These dyes may be chosen, for example, from red or orange dyes of the fluoran type such as those described in the patent application FR2840806. For example, the following dyes may be mentioned: tetrabromofluorescein or eosin known under the name CTFA: CI 45380 or Red 21 - phloxine B known under the name CTFA: CI 45410 or Red 27 - diiodofluorescein known under the name CTFA CI 45425 or Orange 10; dibromofluorescein known under the name CTFA: CI 45370 or Orange 5. The sodium salt of tetrabromofluorescein known under the name CTFA: CI 45380 (Na salt) or Red 22 - the sodium salt of phloxine B known under the CTFA name: CI 45410 (Na salt) or Red 20 28 - the sodium salt of diiodofluorescein known as CTFA: CI 45425 (Na salt) or Orange 11; erythrosine known under the name CTFA: CI 45430 or Acid Red 51. phloxine known under the name CTFA: CI 45405 or Acid Red 98. These dyes may also be chosen from antraquinones, caramel, carmine, coal black, blue azulenes, methoxalene, trioxalene, guajazulene, chamuzulene, bengal rose, cosine 10B, cyanosine, daphinin.

These dyes may also be chosen from indole derivatives such as the monohydroxyindoles as described in the patent FR2651126 (ie: 4-, 5-, 6- or 7-hydroxyindole) or the dihydroxyindoles as described in the EP-patent. B-0425324 (ie: 5,6-dihydroxyindole, 2-methyl-5,6-dihydroxyindole, 3-methyl-5,6-dihydroxyindole, 2,3-dimethyl-5,6-dihydroxyindole); 15 Abrasive loads or exfoliating agents

As exfoliation agents that can be used in rinsed compositions according to the invention, mention may be made, for example, of exfoliant or scrubbing particles of mineral, vegetable or organic origin. Thus, for example, beads or polyethylene powder, nylon powder, polyvinyl chloride powder, pumice, ground apricot kernels or nut shells can be used. sawdust, glass beads, alumina, and mixtures thereof. Also included are Exfogreen® from Solabia (bamboo extract), strawberry akenes (Greentech strawberry Akenes), peach kernel powder, apricot kernel powder, and finally in the field of vegetable powders with abrasive effect, mention the cranberry powder.

Preferred abrasive fillers or exfoliating agents according to the invention include peach kernel powder, apricot kernel powder, cranberry kernel powder, strawberry achene extracts, bamboo extracts. .

The invention also relates to a cosmetic assembly comprising at least: a first composition comprising, in a physiologically acceptable medium, at least one compound or set of compound A as described above, a second composition comprising, in a medium physiologically acceptable, at least one compound C as described above.

The assembly according to the invention can thus be composed of a two-compartment system. It may also correspond to a set comprising the first composition in a first galenic form (for example a cream containing the compound or set of compounds A) is the second composition in a second galenic form (for example a roll-on system, a spray, ...) Such a cosmetic assembly can be useful when components of the first and second composition are not instability (whether physical or chemical) when they are mixed, or when wishes to prevent the compound or set of compounds A and the compound C can act between them before application to the skin. Thus, by formulating the compositions, the stability of the DHA can be substantially improved, for example.

Thus, according to a particular embodiment, the cosmetic assembly comprises: a first composition comprising a compound A or a set of compounds A as defined above, the FA function being a primary amine function (the compound A being more particularly APTES); and a second composition comprising DHA.

The following examples are provided by way of illustration, and not limitation, of the invention. 25 Examples

EXAMPLE 1 Demonstration of the Improvement of the Persistence Properties of the Formulas Test Principle: The desired properties are achieved by insolubilization of the deposit obtained by application of a molecule bearing a function capable of reacting with a free amine on the Po1yAPTES film obtained from a primary amine-containing alkoxysilane.

For this purpose, by evaporation of a solution, a film of polyAPTES is formed in a Petri dish by depositing therein about 6 ml of the formulation of Table I below. After drying and forming a film in the Petri dish, a few drops of the formulation of Table 2 below are then deposited. In a few minutes a brown coloration appears where the few drops of the formulation of Table 2 have been deposited. The coloration is intensifying and reaches its maximum in about 1 hour. Such a fast rise in color is particularly surprising and unexpected.

The insolubilization of the deposits following the application of a solution of DHA on the Po1yAPTES film is demonstrated by depositing a sufficient quantity of water in the Petri dish. After a few hours the deposit of polyAPTES is solubilized except where a drop of DHA solution has been deposited. At this point, the deposit remains insoluble and floats in the Petri dish.

Example 2 Formulations Comprising a Free Amine Alkoxysilane (A) and DHA (C)

Table 1: Formulation containing a free amino-functional alkoxysilane Type Concentration (%) LACTIC ACID 1.5 APTS 10 WATER 88.5 Table 2: Formulation containing DHA: Type Concentration DHA 7 DISODIUM EDTA 0.1 PRESERVATIVE 0.7 CONSERVATIVE 0.2 GLYCERIN 2 PROPYLENE GLYCOL 2 PEG-60 HYDROGENATED CASTOR OIL 0.35 WATER 87.65 The formula based on Aptes is first applied. After drying and reaction (1 day), the formula based on DHA is applied. It is seen that the coloration is intensifying and reaches its maximum in about 1 hour. EXAMPLE 3 Formulations of an Alkoxysilane (A) and a Perfuming Compound (C) The Formulation Containing an Alkoxysilane with a Free Amine Function is from Table 1 above. Table 3: Formulation containing cinnamaldehyde Type Concentration (%) CINNAMIC ALDEHYDE 0.5 DISODIUM EDTA 0.1 PRESERVATIVE 0.7 PRESERVATIVE 0.2 GLYCERIN 2 PROPYLENE GLYCOL 2 PEG-60 HYDROGENATED CASTOR OIL 0.35 WATER 94.15 Example 4: Formulations containing an alkoxysilane (A) and a UV filtering compound (C) The formulation containing an alkoxysilane having a free amine function is that of Table 1 above.

Table 4: Formulation Containing Mexoryl SX: Type Concentration (%) MEXORYL SX 20 DISODIUM EDTA 0.1 PRESERVATIVE 0.7 PRESERVATIVE 0.2 GLYCERINE 2 PROPYLENE GLYCOL 2 PEG-60 HYDROGENATED CASTOR OIL 0.35 WATER 74.65 15 Example 5: Formulations containing an alkoxysilane (A) and an anti-dandruff active (C) The formulation containing an alkoxysilane having a free amine function is that of Table 1 above. Table 5: Formulation containing ZnPt: Type Concentration (%) ZINC PYRITHIONE 2 DISODIUM EDTA 0.1 PRESERVATIVE 0.7 PRESERVATIVE 0.2 GLYCERIN 2 PROPYLENE GLYCOL 2 PEG-60 HYDROGENATED CASTOR OIL 0.35 WATER 92.65 EXAMPLE 6 Formulations containing an alkoxysilane (A) and an active ingredient skin (C) The formulation containing an alkoxysilane having a free amine function is that of Table 1 above.

Table 6: Formulation containing Vitamin C Type Concentration (%) VITAMIN C 2 DISODIUM EDTA 0.1 PRESERVATIVE 0.7 PRESERVATIVE 0.2 GLYCERINE 2 PROPYLENE GLYCOL 2 PEG-60 HYDROGENATED CASTOR OIL 0.35 WATER 92.65 Example 7 Formulations containing an alkoxysilane (A) and a conditioning polymer (C) The formulation containing an alkoxysilane having a free amine function is that of Table 1 above.

Table 7: Formulation containing a maleic anhydride copolymer: Type Concentration (%) Polypropylene maleic anhydride - LICOCARE of CLARIANT 2 DISODIUM EDTA 0.1 PRESERVATIVE 0.7 PRESERVATIVE 0.2 GLYCERIN 2 PROPYLENE GLYCOL 2 PEG-60 HYDROGENATED CASTOR OIL 0 , 35 WATER 92.65 85

Claims (18)

REVENDICATIONS1. A method of cosmetic treatment of the skin, comprising applying to the skin: - a compound or set of compounds A capable (s) to condense in situ and having at least one reactive function FA free after condensation; and a compound C of cosmetic interest comprising a reactive functional group Fc capable of forming a covalent bond by reaction with the FA function, the material resulting from the condensation of A being soluble in water, and C being chosen so the reaction of said compound C on the material resulting from the condensation of A leads to a decrease in the solubility of said material in water. 2. The method of claim 1, wherein the reaction of the compound C on the material resulting from the condensation of A leads to insolubility of said material in water. 15 3. Process according to claim 1 or 2, in which the compound A comprises an organic silicon compound comprising from 1 to 3 silicon atoms, and at least two hydroxyl or hydrolyzable groups. 20 4. Process according to any one of claims 1 to 3, wherein the reactive function FA is an amine, preferably a primary amine. 5. The process according to any one of claims 1 to 4, wherein compound A has the formula wherein R4 is halogen, OR 'or R'1; R5 is halogen, OR "or R'2, R6 is halogen, OR" or R'3; and R 1, R 2, R 3, R ', R ", R"', R '1, R' 2, R '3 represent, independently of one another, a linear or branched, saturated or unsaturated hydrocarbon group, optionally bearing additional chemical groups such as acidic or amine groups, wherein R1, R2, R ', R "and R"' may further denote hydrogen, and at least two of R4, R5 and R6 being different from R'1 groups , R'2 and R'3. 6. A process according to any one of claims 1 to 5, wherein A is yaminopropyl triethoxysilane (APTES) or a derivative thereof. 7. A method according to any one of claims 1 to 6, said method being a cosmetic process for coloring the skin, wherein the compound C is a molecule capable of imparting a color to the skin. 15 8. The method of claim 7, said method being a tanning process. The process of claim 8, wherein the compound C is dihydroxyacetone (DHA). 20 10. The method of claim 7, the compound C being capable of conferring a color being in particular chosen from cinammaldehyde, citronellal and citral. 11. The method of claim 7, the compound C being selected from compounds capable of forming fluorescent compounds under UV, in particular from nonanal and hydroxycitronellal. 12. A method according to any one of claims 1 to 6, said method being a cosmetic process for conditioning the skin, said compound C being capable of modifying the physicochemical properties of the surface of the skin. 30 13. The method of claim 12, the compound C being selected from the conditioning polymers. The method according to any one of claims 1 to 6, said method being a cosmetic process for modifying a biological activity of the skin, wherein the compound, or set of compounds, A or the compound C is capable of modifying a biological activity of the skin. 15. Method according to any one of claims 1 to 6, said method being a cosmetic method of protection against radiation, in particular against UV radiation, wherein the compound C is chosen from photoprotective agents, in particular from UV filters. . The process according to any of claims 1 to 15, comprising sequentially applying the compounds with: - firstly, applying the compound or the set of compounds A; and - in a second step, possibly after rinsing, the application of compound C. The method of claim 16, said method being a skin dyeing process wherein compound A is APTES and compound C is DHA. 18. A cosmetic assembly comprising at least: a first composition comprising, in a physiologically acceptable medium, at least one compound or set of compound A as defined in any one of claims 1 to 5; a second composition comprising, in a physiologically acceptable medium, at least one compound C as defined in any one of claims 1 to 16.