MXPA00005900A - Use of hyperbranched polymers and dendrimers comprising a particular group as film-forming agent, film-forming compositions comprising same and use particularly in cosmetics and pharmaceutics - Google Patents

Abstract

The invention concerns the use of hyperbranched polymers and dendrimers, comprising at least one group of formula (I) in which:Y represents the oxygen atom or a NH group;and A represents a C1-C12 alkane di-yl group, linear, branched or cyclic, saturated or unsaturated;said group being optionally interrupted by one or several heteroatoms and/or substituted by a function selected among:amino (-NH2):acylamino (-NH-CO-R) in which R represents a C1-C10 alkyl group, linear, branched or cyclic, saturated or unsaturated;carboxylic acid (-COOH), ester (-COOR) in which R represents a C1-C10 alkyl group, linear, branched or cyclic, saturated or unsaturated, as film-forming agent. The invention also concerns a film-forming composition comprising said compound and its use particularly in cosmetics or pharmaceutics.

Description

USE OF HYPER-RAMIFIED AND DENDRIMEROS POLYMERS THAT CONTAIN A PARTICULAR GROUP AS AN AGENT FILM TRAINER, FORMER COMPOSITIONS OF FILMS OUE INCLUDE THEMSELVES AND THEIR PARTICULAR USE IN COSMETICS AND PRODUCTS PHARMACEUTICALS Description of the invention The present invention relates to the use of the novel compounds that make it possible in particular to obtain films on a substrate, and to its application in particular in cosmetics or in pharmaceutical products. The . Hyper-branched polymers and dendrimers are well known in the prior art. Hyper-branched polymers are molecular constructs that have a branched structure, generally around a nucleus. Their structure lacks in general symmetry, the basic units or monomers used to construct the hyper-branched polymer can be of a diverse nature and their distribution is non-uniform. The branches of the polymer can be of different natures and lengths. The number of units REF. 120627 base, or monomers, may be different depending on the different branching. While at the same time they are asymmetric, the hyper-branched polymers can have: an extremely branched structure, around a core; successive generations or branching layers; a layer of extreme chains. Hyper-branched polymers are generally derived from the polycondensation of one or more ABx monomers, where A and B are reactive groups capable of reacting with each other, where x is an integer greater than or equal to 2, but other processes can be considered. preparation. Hyper-branched polymers are characterized by their degree of polymerization DP = 1-b, where b is the percentage of nonterminal functionalities in B that have not reacted with a group A. Since the condensation is not systematic, in contrast to the synthesis of the dendrimers, the degree of polymerization is less than 100%. An extreme group T can be reacted with the hyper-branched polymer to obtain a particular functionality on the ends of the chains. Several hyper-branched polymers can be combined with each other, via a covalent bond or any other type of bond, by means of their end groups. Such polymers, known as bridged polymers, fall within the definition of the hyperbranched polymers according to the present invention. Dendrimers are highly branched polymers and oligomers that have a well-defined chemical structure. As a general rule, dendrimers comprise a nucleus, a given number of generations of branches, or spikes, and end groups. The generations of spikes consist of structural units that are identical for the same generation of spikes and which may be identical or different for the different spike generations. The generations of spikes extend radially in a geometric progression of the nucleus. The end groups of a dendrimer from the nth generation are the extreme functional groups of the nth generation spikes or the final generation. The definition of dendrimers' given above, includes molecules that contain symmetric branching; it also includes molecules that contain non-symmetric branching, such as, for example, dendrimers whose spikes are lysine groups, in which the branching of a generation of spikes on the preceding generation takes place on the amin ayes of the lysine, which leads to a difference in the lengths of the spikes of different branching. The dense star polymers, the starburst polymers and the rod-shaped dendrimers are included in the present definition of dendrimers. Molecules known as arboroles and cascade molecules also fall within the definition of dendrimers according to the present invention. Several dendrimers can be combined with each other, via a covalent bond or any other type of link, by means of their extreme groups to give species known as dendrimers bridged or aggregates of dendrimers. Such species are included in the definition of the dendrimers according to the present invention. The dendrimers may be in the form of a junction of molecules of the same generation, which are referred to as monodisperse junctions; these may also be in the form of junctions of different generations, known as polydispersed junctions. The definition of dendrimers according to the present invention includes the assemblies of monodisperse and polydisperse dendrimers. The French patent application FR 97/04085 in the name of the Applicant describes in particular the novel polymers selected from hyperbranched and dendrimer polymers, which comprise functional groups corresponding to the following formula: HS A N di! in which * Y represents an oxygen atom or an NH group, * A represents a linear, branched or cyclic, saturated or unsaturated alkanedi group of 1 to 12 carbon atoms, this group optionally being interrupted with one or more heteroatoms and / or substituted with a functional group selected from amino, acylamino, carboxylic acid and ester These polymers find an application in particular in cosmetics and dermatology, as antioxidants or reducing agents. Now, the Applicant has found, surprisingly, that the said polymers can also be used to allow the preparation of the compositions, in particular cosmetic or pharmaceutical compositions, which make it possible to obtain a film when these are deposited on a substrate. Thus, an object of the present invention is the use of at least one compound selected from the hyper-branched and dendrimer polymers, comprising at least one group of the formula: \ N - C - A A - C - N (i; / \ wherein: * Y represents an oxygen atom or a group 'NH, and * A represents a linear, branched or cyclic, saturated or unsaturated alkanedi group of 1 to 12 carbon atoms, this group optionally being interrupted with one or more heteroatoms and / or substituted with a functional group selected from: amino (-NH2), - acylamino (-NH-CO-R) in which R represents a linear, branched or cyclic, saturated or unsaturated alkyl group of 1 to 10 atoms of carbon, carboxylic acid (-COOH), ester (-COOR) in which R represents a linear, branched or cyclic, saturated or unsaturated alkyl group of 1 to 10 carbon atoms, as a film-forming agent. Yet another object of the invention is a film-forming composition comprising at least one compound chosen from the hyper-branched and dendrimer polymers, comprising at least one group of the formula (I), the composition being capable of being obtained by oxidation of a composition comprising at least one polymer selected from the hyper-branched and dendrimer polymers comprising at least one group of the formula (II). Yet another object of the invention is the use of at least one polymer chosen from the hyper-branched and dendrimer polymers, comprising at least one group of the formula (II), for the preparation of a film-forming composition comprising at least a compound chosen from the hyper-branched and dendrimer polymers, comprising at least one group of the formula (I), or a composition as defined above. Yet another object of the invention is a process for obtaining a film on a support, in which a composition as defined above is applied to said support. Yet another object of the invention is a process for obtaining a film on a support, in which a composition comprising a polymer is applied to the support, this polymer being chosen from the hyper-branched and dendrimer polymers comprising at least one group of the formula (II), and the composition is oxidized during or after its application to said support. The prior art describes a certain number of film-forming agents for the production of films. In particular, mention may be made of film-forming polymers which may be polymers mediated by free radicals, or polycondensates, among which mention may be made of acrylic polymers and polyurethanes. Such polymers are used in particular in the field of hair care, for example in lacquers, in the field of makeup, for example in nail varnishes or varnishes in an organic solvent medium. However, these film-forming agents have certain drawbacks. In particular, these film-forming agents form films as soon as they are deposited on the support. In contrast, the compounds according to the invention form films only in the oxidation medium. In this way, it is possible to apply an aqueous or aqueous-alcoholic solution, for example, of the thiols (II) as a thin layer on a support, and then, at the chosen time, they are chemically oxidized or left to oxidize freely, in particular outdoors , the thiols in the compounds (I), whose compounds will form with the drying, on the support, a highly adherent film and washable with water. The compounds according to the invention allow the production of films similar to those obtained with film-forming polymers of the prior art.

Depending on the oxidation conditions, the quality of the films obtained may vary: adherent or non-adherent films, glossy or matte films, etc. In this way, as a function of the oxidation conditions, the glossy films can be easily obtained, which adhere perfectly to the support and are non-sticky; when such films comprise a pigment or a dye, they do not mark the support on which they are deposited since they do not exude or spill. The compounds that can be used within the scope of the invention are chosen from the hyper-branched and dendrimer polymers, and comprise at least one group of the formula (I): \ / N C - A N (I) / \ wherein: * Y represents O or NH, * A represents a linear, branched or cyclic, saturated or unsaturated alkanedi group of 1 to 12 carbon atoms, this group optionally being interrupted with one or more heteroatoms and / or substituted with a functional group chosen from: - amino (-NH2) optionally in the form of a salt or an inorganic or organic acid, acylamino (-NH-COR) in which R represents a linear, branched or cyclic, saturated or unsaturated alkyl group from 1 to 10 carbon atoms, - carboxylic acid (-COOH), ester (-C00R) in which R represents a linear, branched or cyclic, saturated or unsaturated alkyl group of 1 to 10 carbon atoms. Preferably, the compound according to the invention is chosen from the hyperbranched polymers, and in particular from the polyethylenimine, which comprises at least one group of the formula (I). Preferably, Y represents an oxygen atom. Preferably, the heteroatoms are chosen from oxygen and nitrogen (0 and N). Preferably, A is a methylene, ethylene, propylene, methylpropylene, ethylpropylene, tetramethylene, pentamethylene, hexamethylene, phenylene or phenyldiyl group.

Advantageously, A represents a radical corresponding to one of the following formulas (a) to (d): (a) -CHR ^ CHR ^ CHR3- (b) -CHR ^ -CHR ^ -CHR ^ -CHR '- (c) (d) - (CHR '' '1) k- (CHR' '' 2) -CH (C02H) -NH- in which * R1, R2, R3, R'1, R'2, R'3 and R'4, R '' 'x and R' "2, which may be identical or different, represent: a hydrogen atom, a linear, branched or cyclic, saturated or unsaturated alkyl radical of 1 to 6 carbon atoms; amino radical (-NH2), a carboxylic acid radical (-COOH), an alkylamino radical of 1 to 10 carbon atoms, an acylamino radical of 1 to 10 carbon atoms; * R "1, R" 2, R "3 and R "4, which may be identical or different, represent: a hydrogen atom, a linear or branched, saturated or unsaturated alkyl radical of 1 to 4 carbon atoms, the arrows indicating the positions of the substitutions; * k is an integer, preferably 0 or 1. Preferably, A is selected from the following groups: -CH2-CH (C02H) -NH-; - (CH2) 2- (CH3C0NH) CH-; - (CH2) 3- Y- CH2-CH (NH-CO-CH3) - The compounds according to the invention can be obtained in particular by oxidation of the polymers described in patent application FR 97/04085, the content of which is incorporated by reference herein, and which are chosen from the hyper-branched polymers and dendrimers, which comprise functional groups corresponding to the formula (II): HS A N (II) wherein: * Y represents O or NH, * A represents a linear, branched or cyclic, saturated or unsaturated alkanedi group of 1 to 12 carbon atoms, this group optionally being interrupted with one or more heteroatoms and / or substituted with a functional group chosen from amino, acylamino, carboxylic acid and ester. Oxidation can be carried out by any known means, for example in air or using a common oxidizing agent such as hydrogen peroxide. The oxidation step allows the formation of disulfide, intramolecular and intermolecular bridges, starting with the thiol functional groups, according to the following scheme: SH Air HS or SH oxidation agent HS A B The formation of the disulfide bridges causes a "pseudo-crosslinking" of the initial compounds A, which is reflected in the formation of compounds B which make it possible to obtain films when they are deposited on a substrate. The oxidation step preferably carried out in the presence of water, for example in aqueous or aqueous-alcoholic medium. After application on a substrate, it is thus possible to obtain films containing only one or more compounds B according to the invention and optionally the initial compounds A which have not reacted, when the oxidation is only partially carried out. It has also been found that it is possible to incorporate water-soluble or water-insoluble additives before the oxidation into the aqueous or aqueous-alcoholic medium while at the same time retaining the possibility of obtaining a suitable film. Among the additives that may be incorporated, mention may be made of water-soluble dyes such as Rhodamine; cosmetic active agents or pharmaceuticals soluble in water; water-insoluble products having in particular optical properties such as phorescence or fluorescence; pigments; fillers; sun filters; cosmetic active agents or pharmaceuticals insoluble in water. It has further been found that the solid additives, the pigment particles or fillers, for example, were completely dispersed homogeneously in the film; these are completely enclosed in the structure of the film. There is no release of the particles, and the films are not sticky or sticky. It is known that the properties of the films obtained depend on the oxidation conditions, in particular the concentration of the initial thiol-containing polymer, the number of thiol functional groups in the thiol-containing polymer, the molar mass of the polymer and / or of the pH of the aqueous / aqueous-alcoholic medium before oxidation. In this way, the films can be prepared directly using an aqueous solution or an aqueous-alcoholic solution of the thiol-containing polymer. During drying, the thiol functional groups will be oxidized to disulfides. It has been found that, in this case, the films obtained may be visually non-uniform and may remain sticky or sticky.

When an aqueous or aqueous-alcoholic solution of the thiol-containing polymer is oxidized chemically and when a film is prepared using this liquid oxidized solution, the film obtained after drying is generally very uniform, with a very uniform, glossy, transparent surface, colorless, highly adherent and can be fragile when you want to detach it. These films are not water resistant. In this way, it is possible to obtain a composition that can form films and which can be used in its native form, as a cosmetic or pharmaceutical composition, or incorporated within a composition, in particular a cosmetic or pharmaceutical composition, which can then comprising a cosmetically or pharmaceutically acceptable medium. The aforementioned cosmetic or pharmaceutical composition can be in any form that is suitable for topical application, in particular in the form of aqueous or aqueous-alcoholic gels; in the form of water-in-oil, oil-in-water or multiple emulsions, of more or less thick liquid consistency, such as milk or cream; spray or spray foams; bars or tubes; solutions or liquid dispersions. A person skilled in the art knows how to prepare these compositions according to the usual methods, based on his general knowledge. In particular, these compositions may contain adjuvants usually used in the cosmetic or pharmaceutical fields, such as oils, waxes or other common fatty substances; surfactants; humectants; emollients; sunscreen; hydrophilic or lipophilic active agents such as ceramides; free radical scavengers; polymers; proteins; bactericides; kidnapping agents; antidandruff agents; antioxidants; conservative agents; alkalizing or acidifying agents; fragrances; fillers; colorants; active cosmetic or pharmaceutical agents. The amounts of these various adjuvants are those conventionally used in the fields under consideration and can be readily determined by a person skilled in the art. It goes without saying that a person skilled in the art will be careful to select this or these optional additional adjuvants, and / or the amount thereof, such that the advantageous properties of the composition according to the invention are not, or are not substantially affected adversely by the considered addition. The compositions according to the invention are film-forming and can thus be used to form a film on a support, chosen in particular from the skin, mucous membranes, membranes, emulsions, nails and hair of beings. The compositions according to the invention are, for example, lotions, milks or creams for skin care or hair care, creams, lotions or makeup removing milks, makeup bases, lotions, milks or creams against sun or after exposure to the sun, lotions, milks or creams for artificial tanning, creams or foams for shaving, lotions for after shaving, body hygiene compositions such as bars or deodorant creams, shampoos, hair products for maintain hair style or to shape hair such as styling gels, hair coloring products, lipsticks, eyeliner or eyeliner s can be for treatment purposes; varnishes for nails or products for the care of the nails. The invention is illustrated in more detail in the following examples. Examples 1 to 3 describe the preparation of the starting compounds of the formula (II). Examples 4 to 6 describe the preparation of the films according to the invention.

Example 1: Branched polyethyleneimine polymer of average molecular weight MW = 25000 containing 50 SH functional groups on average per unit 12.28 g of water are added and then, when the medium has become homogenous again, 1.2 ml of β-thiobutyrolactone (for example 50 molar equivalents calculated relative to the polymer), at room temperature, to 12.28 grams of an aqueous solution at room temperature. 56% polyethyleneimine of average molecular weight MW = 25000, sold by the company BASF under the name Lupasol HF, under an inert atmosphere at room temperature. The medium, which is initially heterogeneous, quickly becomes homogeneous (within about 30 minutes).

After stirring for 24 hours, no longer detected -thiobutyrolactone in the medium. This thus gives an aqueous solution of the polyethyleneimine containing thiol of molecular mass of 30,108 which contains on average 50 SH functional groups per polymer chain. 19.60 grams of this solution are diluted with water to 26 ml. This gives an aqueous solution containing 25 g / 100 ml of thiol-containing polymer, for example 0.415 mol / 1 of thiol and 8.30 mmol / l of thiol-containing polymer. The pH of this solution is 10.65.

Example 2: Branched polyethyleneimine polymer of average molecular weight MW = 250Ó0 containing 125 SH functional groups on average per unit 22. 43 g of water followed by 5.44 ml of β-thiobutyrolactone (for example 125 molar equivalents calculated in relation to the polymer) are added, at room temperature, to 22.43 grams of 56% aqueous solution of polyethyleneimine of average molecular weight MW = 25, 000, sold by the company BASF under the name Lupasol HF under inert atmosphere at room temperature. The medium, which is initially heterogeneous, quickly becomes homogeneous (within about 30 minutes). After stirring for 24 hours, no longer detected -thiobutyrolactone in the medium. This gives an aqueous solution of the poly (ethyleneimine) containing thiol of molar mass of 37,770 which contains on average 125 SH functional groups per polymer chain. 32,080 g of this solution are diluted with water to 50 ml. An aqueous solution containing 25 g / 100 ml of thiol-containing polymer, for example 0.827 mol / liter of thiol and 6.619 mmol / liter of thiol-containing polymer is obtained in this way. The pH of this solution is 9.96.

Example 3: Branched polyethyleneimine polymer of average molecular weight MW = 2000 containing 11.09 SH functional groups on average per unit 12 ml of γ-thiobutyrolactone (for example 11.09 molar equivalents calculated based on the polymer) are added at room temperature to 50 grams of a 50% aqueous solution of polyethyleneimine of average molecular weight MW = 2000 sold by the company BASF under the name Lupasol G35, under inert atmosphere at room temperature. The medium, which is initially heterogeneous, quickly becomes homogeneous (within about 30 minutes). After stirring for 16 hours, no longer detected -thiobutyrolactone in the medium. This gives an aqueous solution of poly (ethyleneimine) containing thiol of molar mass of 3132.95 which contains on average 11.09 SH functional groups per polymer chain. This aqueous phase is diluted with water to 100 ml. This gives an aqueous solution containing 39.16 g / 100 ml of thiol-containing polymer, for example 1386 mol / l of thiol. The pH of this solution is 10.15.

Example 4: Preparation of films from polyethyleneimine containing thiol according to example 1 a) First seri e Beginning with the solution containing 25 g / 100 ml prepared in example 1, various solutions are prepared by dilution with water and / or acidification with aqueous hydrochloric acid solution. Its characteristics are as follows: The films are prepared on 10 cm x 10 cm glass plates. The stools are made using an adjustable Adjustable Baker (Braive Instruments) and have a thickness of 150 micrometers. These are allowed to dry in ambient air at 20 ° C, on a flat surface. The deposits are then left to rust in the air. b) Second seri e Using the 25 g / 100 ml solution prepared in Example 1, two other films are also prepared for which the polymer is completely oxidized with a 6% aqueous solution of H202. The liquid oxidized solution is used to prepare films from the 150 micrometer thick deposits on 10 cm x 10 cm glass plates, using an adjustable Baker film maker (Braive Instruments). These are allowed to dry in ambient air, at 20 ° C, on a flat surface.

Film 6: An aqueous solution of oxidized polymer is prepared using a volume of thiol-containing polymer solution prepared according to Example 1, at a concentration of 19.05 g / 100 g (pH 8.96) diluted with one volume of water and oxidized with 1 equivalent of 6% aqueous solution of hydrogen peroxide (the medium remains liquid after the oxidation of thiols to disulfide). The film is prepared using this aqueous solution.

Film 7: An aqueous solution of the oxidized polymer is prepared using 1 volume of solution of the thiol-containing polymer prepared according to Example 1, at a concentration of 15.92 g / 100 ml (pH 6.97) diluted with 0.2 volumes of water and oxidized with 1 equivalent of 6% aqueous solution of hydrogen peroxide. It is known, from the preliminary tests, that the medium remains liquid for a few moments after adding the oxidizing agents, after which it gels. The film is prepared using this aqueous solution before it has gelled. c) Results of the two seri es. 7 films are obtained, the characteristics of which are as follows, 24 hours after drying: - Film 1: non-uniform, shrunken, sticky surface Films 2 to 5: non-uniform sticky surface (presence of bubbles), do not change after of drying for several days Film 6: uniform, sticky surface. This film is dried and is not sticky after drying for 48 hours. This becomes colorless, lustrous, transparent and highly adherent. Film 7: dry surface, not sticky, glossy, very smooth, transparent, colorless and highly adherent. Films 1 through 7 are washable with water Example 5: Preparation of films starting with the thiol-containing poly (ethyleneimine) according to Example 2 a) First seri e Beginning with the solution containing 25 g / 100 ml prepared in Example 2, several solutions are prepared by dilution with water and / or acidification with aqueous hydrochloric acid solution. Its characteristics are as follows: The films are prepared on 10 cm x 10 cm glass plates. The stools are made using an adjustable Baker filmmaker (Braive Instruments) and have a thickness of 250 micrometers. These are allowed to dry in the ambient air, at 20 ° C, on a flat surface. The deposits are left to oxidize in the air. b) Second seri e Four other films are also prepared, for which the polymer is totally oxidized with 1 equivalent of a 6% aqueous solution of hydrogen peroxide. The oxidized solution that is still liquid, before its possible gelation, is used to prepare films starting with 250 micrometer thick deposits made on 10 cm x 10 cm glass plates, using an adjustable Baker film maker (Braive Instruments). These are allowed to dry in the ambient air at 20 ° C, on a flat surface. c) Resulted from the two series 7 films are obtained, the characteristics of which are as follows, after 24 hours of drying: Film 8: dry, non-sticky, glossy, transparent, colorless and highly adherent Film 9: sticky surface , shrunken, not uniform (presence of bubbles), does not change after drying for several days Film 10: sticky, slightly shrunk - Films 11 to 14: dry surface, not sticky, glossy, very smooth, transparent, colorless and highly adherent. Films 8 to 14 are washable with water.

Example 6: Preparation of films starting with the thiol-containing poly (ethyleneimine) according to Example 3 a) First seri e Beginning with 39.16 g / 100 ml of the solution prepared in Example 3, a solution is prepared at pH 7 by acidification with an aqueous solution of hydrochloric acid. Its characteristics are as follows: Beginning with this solution, prepare two aqueous or aqueous-alcoholic samples (water + absolute ethanol) containing: Product A: blue pigment (FD &C Blue) No.l, Aluminum Lake, Cl 42090: 2) Product B: red pigment (D &C Red No. 7, Calcium Lake) according to the following table * calculated by weight relative to the weight of the thiol-containing polymer From the preliminary tests, it is known that solutions 16 and 17, after the addition of the oxidizing agent (1 equivalent of 6% aqueous solution of hydrogen peroxide) remain liquids for a few moments before gelling. The films were prepared using polymers that undergo oxidation, before gelation, for example during crosslinking (just after the addition of 1 equivalent of 6% aqueous solution of hydrogen peroxide, the oxidizing agent being added with vortexing) . The films are prepared on 10 cm x 10 cm glass plates. The tanks are prepared using a Baker Adjustable Filmograph (Braive Instruments) and have a thickness of 200 micrometers. These are allowed to dry in ambient air, at 20 ° C, on a flat surface. After drying, two colored films are obtained: the film 16 is transparent pale blue and the film 17 is transparent orange. These two films have a very uniform surface, have a lustrous appearance and appear uniform to the naked eye. These are not sticky. The pigment particles can be distinguished. These films are highly adherent and are washable with water. b) Second seri e Beginning with solution 15, prepare two aqueous or aqueous-alcoholic samples (water + absolute ethanol) containing Rhodamine B (RN = [81-88-9]) according to the following table: * calculated by weight relative to the weight of the thiol-containing polymer. From the preliminary tests, it is known that solutions 18 and 19, after the addition of 1 equivalent of 6% aqueous solution of hydrogen peroxide, remain liquid for a few moments before gelation. The films are prepared using the solutions of the polymers that undergo oxidation, before gelation, for example during crosslinking (just after the addition of 1 equivalent of 6% aqueous solution of hydrogen peroxide, the oxidizing agent being added with agitation in whirlwind). The films are prepared on 10 cm x 10 cm glass plates. The stools are made using an adjustable Baker filmmaker (Braive Instruments) and have a thickness of 200 micrometers. These are allowed to dry in ambient air, ° C, on a flat surface. After drying, two transparent pale pink films are obtained. These two films have a very uniform surface, have a lustrous appearance and appear uniform to the naked eye. These are not sticky. These films are highly adherent and are washable with water.

It is noted that in relation to this date the best method known by the applicant to carry out the aforementioned invention is that it is clear from the present description of the invention.

Claims (18)

CLAIMS Having described the invention as above, the content of the following claims is claimed as property:

1. The use of at least one compound chosen from the hyperbranched polymers and dendrimers, comprising at least one group of the formula: \ N - C A A C - N (I) / \ wherein: * Y represents an oxygen atom or an NH group, and * A represents a linear, branched or cyclic, saturated or unsaturated alkanedi group of 1 to 12 carbon atoms, this group optionally being interrupted by one or more • heteroatoms and / or substituted with a functional group selected from: amino (-NH2), acylamino (-NH-CO-R) in which R represents a linear, branched or cyclic, saturated or ipsaturated alkyl group of 1 to 10 carbon atoms carbon, carboxylic acid (-C00H), ester (-COOR) in which R represents a linear, branched or cyclic, saturated or unsaturated alkyl group of 1 to 10 carbon atoms.

2. The use according to claim 1, wherein the compound is chosen from the hyperbranched polymers, and in particular polyethylenimine, which comprises at least one group of the formula (I).

3. The use according to any of the preceding claims, wherein Y represents an oxygen atom.

4. The use according to any of the preceding claims, wherein A represents a radical corresponding to one of the following formulas (a) to (d): (a) -CHR1-CHR2-CHR3- (b) -CHR '1 -CHR'2-CHR '3-CHR' 4- (c) (d) - (CHR '' ') k- (CHR' '' 2) -CH (C02H) -NH-in which * R1, R2, R3, R'1, R'2, R'3 and R '4, R' ''? and R '"' 2, which may be identical or different, represent: a hydrogen atom; a linear, branched or cyclic, saturated or unsaturated alkyl radical of 1 to 6 carbon atoms; an amino radical (-NH2); a carboxylic acid radical (-COOH); an alkylamino radical of 1 to 10 carbon atoms; an acylamino radical of 1 to 10 carbon atoms; * R "1, R" 2, R "3 and R" 4, which may be identical or different, represent: a hydrogen atom; a linear or branched, saturated or unsaturated alkyl radical of 1 to 4 carbon atoms, the arrows indicating the positions of the substitutions; * k is an integer, preferably 0 or 1.

5. The use according to any of the preceding claims, wherein A is chosen from the following groups: -CH2-CH (C02H) -NH-; - (CH2) 2- (CH3CONH) CH-; - (CH2) 3 ~ and

6. The use according to any of the preceding claims, in a cosmetic or pharmaceutical composition also comprising a cosmetically or pharmaceutically acceptable medium.

7. A film-forming composition comprising at least one compound selected from branched polymers and dendrimers, comprising at least one group of the formula (I), as defined according to any of claims 1 to 5.

8. The composition according to claim 7, characterized in that it can be obtained by oxidation of a composition comprising at least one polymer chosen from the hyperbranched polymers and dendrimers comprising at least one group of the formula (II): HS- -C-N- (II) in which: * Y represents an oxygen atom or an NH group, and * A represents a linear, branched or cyclic, saturated or unsaturated alkanedi group of 1 to 12 carbon atoms, this group optionally being interrupted with one or more heteroatoms and / or substituted with a functional group selected from: amino (-NH2), - acylamino (-NH-COR) in which R represents a linear, branched or cyclic, saturated or unsaturated alkyl group of 1 to 10 carbon atoms, carboxylic acid (-COOH), - ester (-COOR) in which R represents a linear, branched or cyclic, saturated or unsaturated alkyl group of 1 to 10 carbon atoms.

9. The composition according to any of claims 7 and 8, characterized in that the oxidation is carried out in air or using a common oxidizing agent such as hydrogen peroxide.

10. The composition according to any of claims 7 to 9, characterized in that the oxidation is carried out in the presence of water, for example in aqueous or aqueous-alcoholic medium.

11. The composition according to claim 10, characterized in that the water-soluble or water-insoluble additives are incorporated, before oxidation, into the aqueous or aqueous-alcoholic medium.

12. The composition according to claim 11, characterized in that the additives are chosen from water-soluble dyes such as Rhodamine; water soluble cosmetic or pharmaceutical active agents; water-insoluble products that have optical properties such as phosphorescence or fluorescence; pigments; fillers; sun filters; cosmetic active agents or pharmaceuticals insoluble in water.

13. The composition according to any of claims 7 to 12, characterized in that it is in the form of a cosmetic or pharmaceutical composition also comprising a cosmetically or pharmaceutically acceptable medium.

14. The composition according to claim 13, characterized in that it is in the form of lotions, milks or creams for skin care or hair care; creams, lotions or makeup removing milks; bases for makeup; lotions, milks or sunscreen or after sun exposure; lotions, milks or creams for artificial tanning; creams or foams for shaving; aftershave lotions; compositions for body hygiene such as bars or deodorant creams; shampoos; hair products to maintain hair style or to shape hair such as gels for styling; hair coloring products; lipsticks; lick them or eyeliners that can be for treatment purposes; nail varnishes or products for nail care.

15. The use of at least one polymer chosen from the hyper-branched polymers and the dendrimers comprising at least one group of the formula (II): HS-A-C- II wherein Y and A have the meanings defined above, for the preparation of a film-forming composition comprising at least one compound selected from the hyper-branched polymers and dendrimers comprising at least one group of the formula (I), or of a composition according to any of claims 7 to 14.

16. A process for obtaining a film on a support, characterized the process because the composition according to any of claims 7 to 14, is applied to the support.

17. A process for obtaining a film on a support, characterized in that: a composition comprising a polymer chosen from the hyperbranched polymers and dendrimers comprising at least one group of the formula (II), is applied to the support, and the The composition is oxidized during or after its application to said support.

18. The process according to any of claims 16 and 17, characterized in that the support is chosen from the skin, the mucous membranes, the semi-mucosal membranes, the nails and the hair.