FR2915889A1 - Cosmetic composition in foam form, useful in kit for make-up and/or non therapeutic care product for coating keratinous material, comprises continuous oily phase and structuring agent of oily phase comprising polyamide polymer - Google Patents

Abstract

Cosmetic composition (I) in foam form, comprises a continuous oily phase and at least a structuring agent of the oily phase comprising polyamide polymer. An independent claim is included for a kit for make-up and/or non-therapeutic care of keratinous material comprising a container containing (I), and an applicator containing at least an application element for applying (I).

Description

The present invention relates to a composition in the form of foam

  comprising a continuous liquid fatty phase and a polyamide.

  The compositions according to the invention may be makeup or care compositions for keratin materials, in particular skin, lips, eyelashes, eyebrows or nails. The composition may be colored or uncoloured. Each composition can be a foundation, a blush, an anti-ring product, a blush, a lipstick, a lip balm, a lip gloss, a mascara, an eyeliner or even a body makeup product or skin coloring. The care composition may be a product for the care of eyelashes, lips, skincare of the body and the face, in particular a solar product.

  Foamed compositions are known that are oil-in-water or water-in-water emulsions comprising a continuous aqueous phase. However, these compositions do not always have the gloss desired by consumers, especially in the case of lipsticks. It is therefore sought to obtain compositions which have an original texture, in the form of foam and which have a satisfactory gloss, via the incorporation of a certain amount of oils which make it possible to provide these gloss properties.

  It is also sought to formulate compositions comprising a high content of volatile or non-volatile oils or organic solvents, so as to improve the resistance and / or the resistance to water, sebum and / or the non-transfer properties of said compositions. . In addition, the compositions in the form of a foam must have good stability over time, in particular in terms of homogeneity and appearance of the product. It is an object of the present invention to provide an alternative form of formulation for a keratinous material coating composition which has a foam texture.

  More specifically, the subject of the invention is a cosmetic composition in the form of a foam comprising a continuous oily phase and at least one structuring agent for the oily phase chosen from polyamide polymers. By composition in the form of foam is meant a composition comprising a gaseous phase (for example air) in the form of bubbles, it is still referred to as an expanded composition.

  The foam composition has a light texture, easy to collect and spread on keratin materials.

  The subject of the invention is also a process for coating keratin materials, comprising the application to said keratin materials of at least one layer of at least one cosmetic composition in the form of a foam comprising a continuous oily phase and at least one structuring agent. the oily phase chosen from polyamide polymers.

  The process for coating keratin materials according to the invention consists in applying the composition in foam form to the keratin materials, it is distinguished from the methods of the prior art in that the foam is not formed in situ on keratin materials that is to say that the foam is not created after application of said composition. In particular, it is not a delayed-expansion composition which is a system in which a so-called volatile agent is released or formed in the composition after it has been applied to the keratin materials. Specifically, the delayed-expansion compositions are created after exposure of a gel to atmospheric pressure, and / or shear and / or temperature above room temperature.

  The subject of the invention is also a make-up and / or non-therapeutic care kit for keratin materials comprising: a composition in the form of a foam comprising a continuous oily phase and at least one structuring agent for the oily phase chosen from polyamide polymers and an applicator comprising at least one application element configured to apply the composition to the keratin materials.

Density

  The composition in the form of foam has in particular a density (dmousse) less than or equal to 0.95, preferably less than or equal to 0.9, better, less than or equal to 0.8. The density is preferably greater than or equal to 0.2, and more preferably greater than or equal to 0.3. 3 The density is measured according to the following protocol: a container whose volume Vo (cm 3) is known with an accuracy of 0.005 cm 3 (Vo being of the order of 10 cm 3), is weighed by means of a precision balance at 0.00005g. Its mass is noted Mo (g). This container is filled gently with the foam until the overflow of the container. The surface of the container is then leveled with a straight blade to obtain a perfectly flat foam surface. The mass M (g) of the container filled with foam is then measured. The density corresponds to the ratio between the density of the composition calculated as follows: Pv (g / cm 3) = M Mo Mo over the density of the water (1 g / cm 3). The composition used in the process according to the invention has a density of less than or equal to 0.95, preferably less than or equal to 0.9, better still, less than or equal to 0.8. Preferably, the density of the composition is greater than or equal to 0.2, and better

  Greater than or equal to 0.3. Rate of expansion The rate of expansion corresponds to the quantity of gas incorporated in the composition. In particular, it may be defined by the following formula: ## EQU1 ## The amount of expansion before the expansion is measured according to the method described above for the foam. The foam composition advantageously has a degree of expansion greater than or equal to 10%, and preferably less than 350%.

  The expansion rate may range, for example, from 10% to 300%, preferably from 30% to 250% and better still from 40% to 200%. 20 25 35 Size of the bubbles:

  The composition according to the invention being in the form of foam, it comprises gas bubbles, advantageously air bubbles.

  In particular, the air bubbles of the composition have a number average diameter of less than or equal to 5 mm, for example from 0.1 m to 5 mm, preferably less than or equal to 1 mm, and better still less than or equal to at 0.8 mm. The average diameter by number is determined as follows: the foam is packaged in pot at the end of the preparation, when it is still fluid. The observation of the size of the bubbles is carried out by taking a digital photo of the surface of the pot 24 hours after manufacture or after opening the packaging after having leveled the surface, then, using the Saisam image processing software, in counting on an area of about 1 cm2 the number of bubbles and determining their average diameter in number.

Dry extract

  The compositions according to the invention may advantageously have a solids content (or solids content) greater than or equal to 60% by weight relative to the total weight of the composition, preferably greater than or equal to 65% by weight, better or better. equal to 70% by weight, the solids content being up to 100% by weight relative to the total weight of the composition. The dry matter content, that is to say the non-volatile matter content, can be measured in various ways, for example oven drying methods, drying methods by exposure to infrared radiation as well as than the chemical methods by Karl Fischer water titration. Preferably, the amount of dry matter, commonly called solids content of the compositions according to the invention, is measured by heating the sample with infrared rays of 2 μm to 3.5 μm wavelength. The substances contained in said compositions which have a high vapor pressure, evaporate under the effect of this radiation. The measurement of the loss of weight of the sample makes it possible to determine the dry extract of the composition. These measurements are carried out using a Mettler LP16 commercial infrared desiccator. This technique is perfectly described in the documentation of the device supplied by Mettler. The measurement protocol is as follows: 4 about 1 g of the composition is spread on a metal cup. This, after introduction into the desiccator, is subjected to a temperature of 120 C for one hour. The wet mass of the sample, corresponding to the initial mass and the dry mass of the sample, corresponding to the mass after exposure to radiation, are measured using a precision balance. The dry matter content is calculated as follows: Dry extract = 100 x (dry mass / wet mass). Preferably, the composition used in the process according to the invention is a non-rinsed composition.

I / OIL PHASE CONTINUES

  The composition according to the invention comprises a continuous oily phase (or liquid fatty phase). By "oily phase", in the sense of the application, is meant a phase composed of one or more non-aqueous fatty substances which are liquid at ambient temperature (25 ° C.) and atmospheric pressure (760 mmHg), also called organic oils or solvents, which are compatible between them.

  The continuous oily phase may represent from 10 to 95% of the total weight of the composition, preferably from 20 to 85% and better still from 40 to 80% by weight.

  The oil may be chosen from volatile oils and / or non-volatile oils, and mixtures thereof.

  By oily continuous phase composition is meant that the composition has a conductivity, measured at 25 C, of less than 23 S / cm (microSiemens / cm), the conductivity being measured for example using a Mettler MPC227 conductivity meter. Toledo and a conductivity measuring cell Inlab730. The measuring cell is immersed in the composition, so as to eliminate air bubbles that may form between the 2 electrodes of the cell. The reading of the conductivity is made as soon as the value of the conductivity meter is stabilized. An average is performed on at least 3 successive measurements.

  For the purposes of the invention, the term "volatile oil" means an oil capable of evaporating on contact with the skin or the keratin fiber in less than one hour, at ambient temperature and atmospheric pressure. The volatile organic solvent (s) and the volatile oils of the invention are organic solvents and volatile cosmetic oils which are liquid at ambient temperature and have a non-zero vapor pressure at ambient temperature and atmospheric pressure, in particular ranging from 0 to 13 Pa at 40,000 Pa (10-3 to 300 mmHg), in particular ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mmHg), and more particularly ranging from 1.3 Pa. at 1300 Pa (0.01 to 10 mmHg). By "non-volatile oil" is meant an oil remaining on the skin or the keratin fiber at ambient temperature and atmospheric pressure for at least several hours and having in particular a vapor pressure of less than 10 -3 mmHg (0.13 Pa). .

  These oils may be hydrocarbon oils, silicone oils, fluorinated oils, or mixtures thereof. The term "hydrocarbon-based oil" means an oil containing mainly hydrogen and carbon atoms and optionally oxygen, nitrogen, sulfur and phosphorus atoms. The volatile hydrocarbon oils may be chosen from hydrocarbon-based oils having 8 to 16 carbon atoms, and especially C8-C16 branched alkanes such as C8-C16 isoalkanes of petroleum origin (also known as isoparaffins), such as isododecane ( also called 2,2,4,4,6-pentamethylheptane), isodecane, isohexadecane, and for example the oils sold under the trade names Isopars' or permetyls, branched esters C8-C16 neopentanoate isohexyl, and mixtures thereof. Other volatile hydrocarbon oils such as petroleum distillates, in particular those sold under the name ShelI or by Shell, may also be used. According to one embodiment, the volatile solvent is chosen from volatile hydrocarbon oils having 8 to 16 carbon atoms and mixtures thereof.

  As volatile oils, it is also possible to use volatile silicones, for example volatile linear or cyclic silicone oils, in particular those having a viscosity of 8 centistokes (8 10-6 m 2 / s), and especially having from 2 to 7 carbon atoms. silicon, these silicones optionally containing alkyl or alkoxy groups having from 1 to 10 carbon atoms. As volatile silicone oil that can be used in the invention, there may be mentioned in particular octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethylisiloxane, octamethyltrisiloxane and decamethyl tetrasiloxane, dodecamethylpentasiloxane and mixtures thereof. It is also possible to mention volatile alkyltrisiloxane linear oils of general formula (I) wherein R represents an alkyl group comprising from 2 to 4 carbon atoms and one of which or more than one hydrogen atom may be substituted with a fluorine or chlorine atom. Among the oils of general formula (I), mention may be made of: 3-butyl 1,1,1,3,5,5,5-heptamethyltrisiloxane, 3-propyl 1,1,1,3,5,5 , 5-heptamethyltrisiloxane, and 3-ethyl-1,1,1,3,5,5,5-heptamethyltrisiloxane, corresponding to the oils of formula (I) for which R is respectively a butyl group, a propyl group or a ethyl group.

  It is also possible to use volatile fluorinated solvents such as nonafluoromethoxybutane or perfluoromethylcyclopentane.

  The composition may also comprise at least one non-volatile oil, and in particular chosen from non-volatile hydrocarbon and / or silicone and / or fluorinated oils.

  Non-volatile hydrocarbon oils that may especially be mentioned include: hydrocarbon-based oils of plant origin, such as esters of fatty acids and of glycerol, the fatty acids of which can have various chain lengths of C4 to C24, the latter being able to be linear or branched, saturated or unsaturated; these oils include wheat germ, sunflower, grape seed, sesame, maize, apricot, castor, shea, avocado, olive, soya, sweet almond, palm, rapeseed, cotton, hazelnut, macadamia, jojoba, alfalfa, poppy, pumpkin, sesame, pumpkin, rapeseed, blackcurrant, evening primrose, millet, barley, quinoa, rye, safflower, bancoulier, passiflora, muscat rose; or alternatively caprylic / capric acid triglycerides, such as those sold by Stéarineries Dubois or those sold under the names Miglyol 810, 812 and 818 by the company Dynamit Nobel, synthetic ethers having from 10 to 40 carbon atoms; linear or branched hydrocarbons of mineral or synthetic origin, such as petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam, and squalane, and mixtures thereof; synthetic esters such as oils of formula R1COOR2 in which R1 represents the residue of a linear or branched fatty acid containing from 1 to 40 carbon atoms and R2 represents a particularly branched hydrocarbon-based chain containing from 1 to 40 carbon atoms at provided that R1 + R2 is 10, such as, for example, purcellin oil (cetostearyl octanoate), isopropyl myristate, isopropyl palmitate, C12-C15 alcohol benzoate, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, isostearate isostearate, octanoates, decanoates or ricinoleates of alcohols or polyalcohols such as propylene glycol dioctanoate; hydroxylated esters such as isostearyl lactate, diisostearyl malate; and pentaerythritol esters; branched-chain and / or unsaturated carbon-chain liquid fatty alcohols having from 12 to 26 carbon atoms, such as octyl dodecanol, isostearyl alcohol, oleic alcohol, 2-hexyldecanol, 2-butyloctanol, 2- undecylpentadecanol; higher fatty acids such as oleic acid, linoleic acid, linolenic acid; carbonates, acetals, citrates, and mixtures thereof.

  The non-volatile silicone oils that may be used in the composition according to the invention may be non-volatile polydimethylsiloxanes (PDMS), polydimethylsiloxanes comprising alkyl or alkoxy groups, during and / or at the end of the silicone chain, groups each having from 2 to 24 carbon atoms, phenyl silicones such as phenyl trimethicones, phenyl dimethicones, phenyl trimethylsiloxy diphenylsiloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes, 2-phenylethyl trimethylsiloxysilicates;

  The fluorinated oils that can be used in the invention are in particular fluorosilicone oils, fluorinated polyethers and fluorinated silicones as described in document EP-A-847752.

  According to one embodiment, the fatty phase contains a non-volatile oil, preferably a hydrocarbon oil, in particular an ester oil. This ester oil may be chosen from esters of monocarboxylic acids with monoalcohols and polyalcohols. Advantageously, said ester corresponds to the following formula (I): R 1 -CO-O-R 2 (1) in which R 1 represents a linear or branched alkyl radical of 1 to 40 carbon atoms, preferably 7 to 19 carbon atoms, carbon, optionally comprising one or more ethylenic double bonds, and optionally substituted. R2 represents a linear or branched alkyl radical of 1 to 40 carbon atoms, preferably of 3 to 30 carbon atoms and better still of 3 to 20 carbon atoms, optionally comprising one or more ethylenic double bonds, and optionally substituted. By optionally substituted, it is meant that R 1 and R 2 may carry one or more substituents selected, for example, from groups comprising one or more heteroatoms selected from O, N and S, such as amino, amine, alkoxy, hydroxyl. Preferably, the total number of carbon atoms of R 1 + R 2 is> 9 R, may represent the residue of a fatty acid, preferably greater, linear or preferably branched comprising from 1 to 40 and better still 7 to 19 carbon atoms and R 2 may represent a linear or preferably branched hydrocarbon chain containing from 1 to 40, preferably from 3 to 30 and more preferably from 3 to 20 carbon atoms. Again, preferably, the number of carbon atoms of R 1 + R 2> 9. Examples of R groups are those derived from fatty acids selected from the group consisting of acetic, propionic, butyric, caproic, caprylic, pelargonic, capric, undecanoic, lauric, myristic, palmitic, stearic, isostearic, arachidic, behenic, oleic, linolenic, linoleic, eleostearic, arachidonic, erucic, and mixtures thereof. Examples of esters are, for example, purcellin oil (cetostearyl octanoate), isononyl isononanoate, isopropyl myristate, 2-ethylhexyl palmitate, octyl stearate 2 dodecyl, octyl 2-dodecyl erucate, isostearyl isostearate, and heptanoates, octanoates, decanoates or ricinoleates of alcohols or polyalcohols, for example fatty alcohols. Advantageously, the esters are chosen from the compounds of the formula (I) above, in which R represents an unsubstituted linear or branched alkyl group, optionally comprising one or more ethylenic double bonds, of 1 to 40 carbon atoms, preferably from 7 to 19 carbon atoms, and R2 represents an unsubstituted linear or branched alkyl group, optionally comprising one or more ethylenic double bonds, of 1 to 40 carbon atoms, preferably of 3 to 30 carbon atoms, and better from 3 to 20 carbon atoms. Preferably, R 1 is an unsubstituted branched alkyl group of 4 to 14 carbon atoms, preferably 8 to 10 carbon atoms, and R 2 is an unsubstituted branched alkyl group of 5 to 15 carbon atoms, preferably 9 to 10 carbon atoms. at 11 carbon atoms. Preferably in the formula (I), R, -CO- and R 2 have the same number of carbon atoms and are derived from the same radical, preferably unsubstituted branched alkyl, for example isononyl, i.e. the ester oil molecule is advantageously symmetrical. The ester oil will preferably be chosen from the following compounds: isononyl isononanoate, cetostearyl octanoate, isopropyl myristate, 2-ethylhexyl palmitate, octyl 2-dodecyl stearate, - octyl 2-dodecyl erucate, - isostearyl isostearate. II / STRUCTURING AGENT

  The structuring agent of the oily phase is chosen from polyamide polymers.

  For the purposes of the invention, the term "polymer" means a compound having at least 2 repeating units, preferably at least 3 repeating units and more preferably 10 repeating units. The structuring agent (s) may represent from 0.1 to 60% by weight relative to the total weight of the composition, preferably from 0.5 to 50% and even more preferably from 1 to 40% by weight. weight.

  The amount by structuring the oily phase can be adjusted by those skilled in the art depending on the structuring properties of said agents.

  The polyamide polymers may in particular be chosen from polyamide polymers comprising a) a polymer backbone having hydrocarbon repeating units provided with at least one non-pendant amide unit, and optionally b) at least one pendant fatty chain and / or at least one less a terminal fatty chain optionally functionalized, comprising at least 4 carbon atoms and being bonded to these hydrocarbon units.

  For the purposes of the invention, the term "functionalized chains" is intended to mean an alkyl chain comprising one or more functional groups or reactive groups chosen in particular from amide, hydroxyl, ether, oxyalkylene or polyoxyalkylene or halogen groups, including fluorinated or fluorinated groups. perfluorinated, ester, siloxane, polysiloxane. In addition, the hydrogen atoms of one or more fatty chains may be substituted at least partially by fluorine atoms.

  For the purposes of the invention, the term "hydrocarbon-repeating units" is intended to mean a unit comprising from 2 to 80 carbon atoms, and preferably from 2 to 60 carbon atoms, bearing hydrogen atoms and possibly carbon atoms. oxygen, which may be linear, branched or cyclic, saturated or unsaturated. These units further include each at least one amide group advantageously non-pendant and located in the polymer backbone.

  Advantageously, the pendant chains are linked directly to at least one of the nitrogen atoms of the polymeric backbone.

  The polyamide may comprise, between the hydrocarbon units, silicone units or oxyalkylenated units.

  In addition, the polyamide of the composition of the invention advantageously comprises from 40 to 98% of fatty chains relative to the total number of amide units and fatty chains and better still from 50 to 95%. Preferably, the fatty chains that are pending are bonded to at least one of the nitrogen atoms of the amide units of the polymer. In particular, the fatty chains of this polyamide represent from 40 to 98% of the total number of amide units and fatty chains, and better still from 50 to 95%.

  Advantageously, the polyamide has a weight average molecular weight of less than 100,000 (in particular ranging from 1,000 to 100,000), in particular less than 50,000 (in particular ranging from 1,000 to 50,000), and more particularly ranging from 1,000 to 30,000. preferably 2,000 to 20,000, and more preferably 2,000 to 10,000.

  The polyamide is insoluble in water, especially at 25 C. In particular, it does not contain an ionic group.

  Preferred polyamides that may be used in the invention include polyamides branched by pendant fatty chains and / or terminal fatty chains having from 6 to 120 carbon atoms and better still from 8 to 120 and in particular from 12 to 68 carbon atoms. each fatty end chain being linked to the polyamide backbone by at least one linking group. The linking group can be selected from ester, ether, amine, urea, urethane, thioester, thioether, thiurea, thiourethane groups. Preferably, these polymers comprise a fatty chain at each end of the polyamide backbone.

  These polymers are preferably polymers resulting from a polycondensation between a dicarboxylic acid having at least 32 carbon atoms (especially having from 32 to 44 carbon atoms) with an amine chosen from diamines having at least 2 carbon atoms (especially from 2 to 36 carbon atoms) and triamines having at least 2 carbon atoms (especially from 2 to 36 carbon atoms) The diacid is preferably a dimer derived from ethylenically unsaturated fatty acid having at least 16 carbon atoms preferably, from 16 to 24 carbon atoms, such as oleic, linoleic or linolenic acid, the diamine is preferably ethylene diamine, hexylene diamine, hexamethylenediamine, triamine is, for example, ethylene triamine, For polymers containing one or two terminal carboxylic acid groups, it is advantageous to esterify them with a monoalcohol having at least 4 carbon atoms, preferably from 10 to 36 carbon atoms. carbon and better from 12 to 24 and even better from 16 to 24, for example 18 carbon atoms.

  The polyamide of the composition according to the invention may in particular be chosen from the polymers of formula (A) below: ## STR2 ## -R '~ wherein: n is an integer ranging from del to 30, - R' 'represents at each occurrence independently a fatty chain and is selected from an alkyl or alkenyl group having at least 1 carbon atom and in particular 4 at 24 carbon atoms; - R'2 represents independently each occurrence a hydrocarbon radical comprising from 1 to 52 carbon atoms; R 13 represents, independently at each occurrence, an organic group comprising at least one atom chosen from carbon, hydrogen and nitrogen atoms, provided that Ria comprises at least 3 carbon atoms; R 1 represents at each occurrence independently: a hydrogen atom, an alkyl group comprising from 1 to 10 carbon atoms, or a direct bond to at least one group selected from R 13 and another R 14 so that when said group is another R'4, the nitrogen atom to which R13 and R14 are bonded is part of a heterocyclic structure defined by R14-NR13, with the proviso that at least 50% of R14 represent an atom of hydrogen, and -L represents a linking group as defined above in the description, optionally substituted with at least one R '' group as defined above.

  According to one embodiment, these polymers are chosen from polymers of formula (A) in which the linking group L represents an ester group -CuO 1 1 O

  These polymers are especially those described in US-A-5783657 of Union Camp. Each of these polymers especially satisfies the following formula (B): ## STR1 ## in which: m denotes an integer number of amide units such as the number of ester groups; 25 is from 10% to 50% of the total number of ester and amide groups; R 'is at each occurrence independently an alkyl or alkenyl group having at least 4 carbon atoms and in particular 4 to 24 carbon atoms; R2 represents independently at each occurrence a C4-C42 hydrocarbon group provided that 50% of the R2 groups represent a C30-C42 hydrocarbon group; R 3 represents at each occurrence independently an organic group provided with at least 2 carbon atoms, hydrogen atoms and optionally one or more oxygen or nitrogen atoms; and R 4 represents, independently at each occurrence, a hydrogen atom, a C 1 -C 4 alkyl group or a direct bond to R 3 or another R 4 so that the nitrogen atom to which are bonded at the same time R3 and R4 form part of a heterocyclic structure defined by R4-N-R3, with at least 50% of R4 representing a hydrogen atom. In the particular case of formula (B), the terminal fatty chains optionally functionalized within the meaning of the invention are terminal chains linked to the last nitrogen atom, the polyamide backbone.

  In particular, the ester groups of the formula (B), which are part of the terminal and / or pendant fatty chains within the meaning of the invention, represent from 15 to 40% of the total number of ester and amide groups and preferably from 20 to 40% of the total number of ester and amide groups. at 35%. In addition, m advantageously represents an integer ranging from 1 to 5 and better still greater than 2. Preferably, R 'is a C12 to C22 alkyl group and preferably a C16 to C22 alkyl group. Advantageously, R2 may be a C4-C42 hydrocarbon (alkylene) group. Preferably, at least 50% and more preferably at least 75% of the R2 are groups having from 30 to 42 carbon atoms. The other R 2 are C 4 to C 19 and even C 4 to C 2 hydrogenated groups. Preferably R3 is a C2 to C36 hydrocarbon group or a polyoxyalkylene group and R4 is a hydrogen atom. Preferably, R3 represents a C2 to C12 hydrocarbon group.

  The hydrocarbon groups can be linear, cyclic or branched, saturated or unsaturated groups. Furthermore, the alkyl and alkylene groups can be linear or branched groups, saturated or not.

  In general, the polymers of formula (B) are in the form of polymer mixtures, these mixtures may additionally contain a synthetic product corresponding to a compound of formula (B) where n is 0, that is, to say a diester.

  By way of example of polyamides of formula (B) that may be used in the composition according to the invention, mention may be made of the commercial products sold by Arizona Chemical under the names Uniclear 80 and Uniclear 100 VG which are sold respectively in the form of gel 80% (active ingredient) in a mineral oil and 100% (active ingredient). They have a softening point of 88 ° C. to 94 ° C. These commercial products are a mixture of copolymers of a C36 di-acid condensed on ethylene diamine, with a weight average molecular weight of about 6000. The terminal ester groups result esterification of the remaining acid termini with cetyl alcohol, stearyl alcohol or mixtures thereof (also referred to as cetylstearyl alcohol).

  As polyamides corresponding to the general formula (A), mention may also be made of polymers comprising at least one terminal fatty chain linked to the polymer backbone by at least one tertiary amide linkage group (also known as amide terminated polyamide or ATPA). Such polymers are available for example under the reference Sylvaclear A 200 V from Arizona Chemical. For more information on these polymers, reference may be made to US Pat. No. 650,322. According to one embodiment, the polyamide of formula (A) may also comprise at least one terminal fatty chain linked to the polymeric backbone by at least one group of ether bond or polyether (it is said then ether terminated poly (ether) amide). Such polymers are described for example in US 6,399,713.

  As polyamide that may be used in the invention, mention may also be made of polyamide resins resulting from the condensation of an aliphatic dicarboxylic acid and a diamine (including compounds having more than 2 carbonyl groups and 2 amine groups), the groups carbonyl and amine of adjacent unitary units being fused by an amide bond. These polyamide resins are especially those marketed under the Versamid brand by General Mills, Inc. and Henkel Corp. (Versamid 930, 744 or 1655) or by the company Olin Mathieson Chemical Corp., under the trademark Onamid including Onamid S or C. These resins have a weight average molecular weight ranging from 6000 to 9000. For more information on these polyamides, reference may be made to US 3645705 and US 3148125. More specifically, Versamid 930 or 744 are used.

  It is also possible to use a poly (ester-amide) with ester ends (ester-terminated poly (ester-amide) or ETPEA), for example those whose preparation is described in document US Pat. No. 6,552,160. is, for example, Sylvaclear C 75 V from Arizona Chemical.

  It is also possible to use the polyamides sold by the company Arizona Chemical under the references Uni-Rez (2658, 2931, 2970, 2621, 2613, 2624, 2665, 1554, 2623, 2662) and the product sold under the reference Macromelt 6212 by the Henkel company. For more information on these polyamides, reference may be made to US 5500209.

  It is also possible to use polyamide resins from vegetables such as those described in patents US 5783657 and US 5998570.

  The polyamide advantageously has a softening temperature of greater than 65 ° C. and may range up to 190 ° C. Preferably, it has a softening temperature ranging from 70 to 130 ° C. and better still from 80 to 105 ° C. The polyamide is in particular non-waxy polymer.

  Preferably, the polyamide has the formula (B) mentioned above. III / Additional compounds

  Film-forming polymer The composition according to the invention may comprise at least one film-forming polymer. The film-forming polymer may be present in the composition according to the invention in a content of dry matter (or active materials) ranging from 0.1% to 30% by weight relative to the total weight of the composition, preferably 0.5 % to 20% by weight, and more preferably from 1% to 15% by weight.

  In the present invention, the term "film-forming polymer" is intended to mean a polymer capable of forming, by itself or in the presence of an auxiliary film-forming agent, a continuous and adherent film on a support, in particular on keratin materials.

  The composition according to the invention may comprise at least one liposoluble (that is to say soluble in a liquid fatty phase comprising organic oils or solvents such as those described above) or lipophilic (that is to say compatible with a liquid fatty phase comprising oils or organic solvents such as those described above).

  As an example of a fat-soluble polymer, mention may be made of vinyl ester copolymers (the vinyl group being directly connected to the oxygen atom of the ester group and the vinyl ester having a saturated hydrocarbon radical, linear or branched, from 1 to 19 carbon atoms, linked to the carbonyl ester group) and from at least one other monomer which may be a vinyl ester (different from the vinyl ester already present), an α-olefin (having from 8 to 28 carbon atoms), an alkyl vinyl ether (the alkyl group of which contains 2 to 18 carbon atoms), or an allyl or methallyl ester (having a linear or branched, saturated hydrocarbon radical of 1 to 19 carbon atoms, bonded to the carbonyl ester group). These copolymers may be crosslinked using crosslinking agents which may be of the vinyl type, or of the allyl or methallyl type, such as tetraallyloxyethane, divinylbenzene, divinyl octanedioate, divinyl dodecanedioate, and octadecanedioate. divinyl. Examples of such copolymers include copolymers: vinyl acetate / allyl stearate, vinyl acetate / vinyl laurate, vinyl acetate / vinyl stearate, vinyl acetate / octadecene, vinyl acetate / octadecylvinylether , vinyl propionate / allyl laurate, vinyl propionate / vinyl laurate, vinyl stearate / octadecene-1, vinyl acetate / dodecene-1, vinyl stearate / ethyl vinyl ether, vinyl propionate / cetyl vinyl ether, stearate of vinyl vinyl / allyl acetate, 2,2-dimethyl-2 vinyl octanoate / vinyl laurate, 2,2-dimethyl-2-allyl pentanoate / vinyl laurate, vinyl dimethyl propionate / vinyl stearate, dimethyl allyl propionate / stearate vinyl propionate / vinyl stearate, crosslinked with 0.2% divinyl benzene, vinyl dimethyl propionate / vinyl laurate, cross-linked with 0.2% divinyl benzene, vinyl acetate / octadecyl vinyl ether, crosslinked with 0.2% of tetraally loxyethane, vinyl acetate / allyl stearate, cross-linked with 0.2% divinyl benzene, vinyl acetate / octadecene-1 cross-linked with 0.2% divinyl benzene and allyl propionate / allyl stearate crosslinked with 0 2% divinyl benzene. Liposoluble film-forming polymers that may also be mentioned include liposoluble copolymers, and in particular those resulting from the copolymerization of vinyl esters having from 9 to 22 carbon atoms or of alkyl acrylates or methacrylates, the alkyl radicals having from 10 to 20 carbon atoms.

  Such liposoluble copolymers may be chosen from copolymers of vinyl polycrystearate, vinyl polystearate crosslinked with divinylbenzene, diallyl ether or diallyl phthalate, copolymers of stearyl poly (meth) acrylate, polyvinylpolate , poly (meth) acrylate lauryl, these poly (meth) acrylates can be crosslinked using dimethacrylate ethylene glycol or tetraethylene glycol.

  The liposoluble copolymers defined above are known and in particular described in application FR-A-2232303; they can have a weight average molecular weight ranging from 2,000 to 500,000 and preferably from 4,000 to 200,000. As liposoluble film-forming polymers that can be used in the invention, mention may also be made of polyalkylenes and especially copolymers of C2-C20 alkenes, such as polybutene, alkylcelluloses with a linear or branched, saturated or non-saturated C1 to C8 alkyl radical, for example ethylcellulose and propylcellulose, copolymers of vinylpyrrolidone (VP) and in particular copolymers of vinylpyrrolidone and of C2 to C40 and better still of C3 to C20 alkene. By way of example of a copolymer of VP which may be used in the invention, mention may be made of the copolymer of VP / vinyl acetate, VP / ethyl methacrylate, polyvinylpyrrolidone (PVP) butylated, VP / ethyl methacrylate / methacrylic acid, VP / eicosene, VP / hexadecene, VP / triacontene, VP / styrene, VP / acrylic acid / lauryl methacrylate.

  Mention may also be made of silicone resins, generally soluble or swellable in silicone oils, which are crosslinked polyorganosiloxane polymers. The nomenclature of the silicone resins is known under the name of "MDTQ", the resin being described according to the different siloxane monomeric units that it comprises, each of the letters "MDTQ" characterizing a type of unit.

  As examples of commercially available polymethylsilsesquioxane resins, mention may be made of those sold: by the company Wacker under the reference Resin MK such as Belsil PMS MK: by the company SHIN-ETSU under the references KR-220L. As siloxysilicate resins, mention may be made of trimethylsiloxysilicate (TMS) resins such as those sold under the reference SR1000 by the company General Electric or under the reference TMS 803 by the company Wacker. Mention may also be made of timethylsiloxysilicate resins sold in a solvent such as cyclomethicone, sold under the name "KF-7312J" by the company Shin-Etsu, "DC 749", "DC 593" by the company Dow Corning.

  Mention may also be made of silicone resin copolymers such as those mentioned above with polydimethylsiloxanes, such as the pressure-sensitive adhesive copolymers marketed by Dow Corning under the reference BIO-PSA and described in document US 5 162 410 or the silicone copolymers resulting from the reaction of a silicone resin, such as those described above, and a diorganosiloxane as described in document WO 2004/073626.

  According to one embodiment of the invention, the film-forming polymer is a film-forming linear ethylenic block polymer, which preferably comprises at least a first block and at least a second block having different glass transition temperatures (Tg), said first and second sequences being interconnected by an intermediate sequence comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block. Advantageously, the first and second sequences and the block polymer are incompatible with each other.

  Such polymers are described for example in EP 1411069 or WO04 / 028488.

  The lipophilic or liposoluble film-forming polymer may also be present in the composition in the form of particles in dispersion in a non-aqueous solvent phase which may be that of the composition according to the invention. The techniques for preparing these dispersions are well known to those skilled in the art.

  As examples of non-aqueous dispersions of film-forming polymer, mention may be made of the dispersions described for example in the document EP 749 746 and in particular the particles of acrylic polymers, stabilized at the surface by a stabilizer, in dispersion in a fatty phase (for example isododecane), such as Mexomère PAP from Chimex, the dispersions of particles of a grafted ethylenic polymer, preferably acrylic, in a liquid fatty phase, the ethylenic polymer being advantageously dispersed in the absence of additional stabilizer at the surface of the particles such as as described in particular in WO 04/055081.

  The film-forming polymer may also be in the form of particles in dispersion in an aqueous phase, for instance the acrylic dispersions sold under the names Neocryl XK-90, Neocryl A-1070, Neocryl A-1090, Neocryl BT-62, Neocryl A- 1079 and Neocryl A-523 by the company AVECIA-NEORESINS, Dow Latex 432 by the company DOW CHEMICAL, Daitosol 5000 AD or Daitosol 5000 SJ by the company DAITO KASEY KOGYO; Syntran 5760 by the company Interpolymer or the aqueous polyurethane dispersions sold under the trade names Neorez R-981 and Neorez R-974 by the company Avecia-Neoresins, the Avalure UR-405, Avalure UR-410, Avalure UR-425, Avalure UR-450, Sancure 875, Sancure 861, Sancure 878 and Sancure 2060 by the company GOODRICH, Impranil 85 by the company BAYER, Aquamere H-1511 by the company HYDROMER; the sulpopolyesters sold under the brand name Eastman AQ by Eastman Chemical Products, vinyl dispersions such as Mexomer PAM from Chimex and mixtures thereof.

  The composition according to the invention may comprise a plasticizer promoting the formation of a film with the film-forming polymer. Such a plasticizer may be chosen from all compounds known to those skilled in the art as being capable of performing the desired function.

  Dyestuff The composition according to the invention may also comprise at least one dyestuff such as pulverulent materials, fat-soluble dyes and water-soluble dyes. The pulverulent dyestuffs may be chosen from pigments and nacres. The pigments may be white or colored, mineral and / or organic, coated or uncoated. Among the inorganic pigments, titanium dioxide, optionally surface-treated, oxides of zirconium, zinc or cerium, as well as oxides of iron or chromium, manganese violet, ultramarine blue, chromium hydrate and ferric blue. Among the organic pigments, mention may be made of carbon black, D & C type pigments, and lacquers based on cochineal carmine, barium, strontium, calcium, aluminum. The nacres may be chosen from white pearlescent pigments such as mica coated with titanium or bismuth oxychloride, colored pearlescent pigments such as titanium mica with iron oxides, titanium mica with ferric blue or chromium oxide, titanium mica with an organic pigment of the aforementioned type as well as pearlescent pigments based on bismuth oxychloride. Liposoluble dyes are for example Sudan Red, D & C Red 17, D & C Green 6, [3-carotene, soybean oil, Sudan Brown, D & C Yellow 11, D & C Violet 2, D & C Orange 5 , the yellow quinoline, the annatto. These dyestuffs may be present in a content ranging from 0.01 to 30% by weight relative to the total weight of the composition.

  Charges The composition according to the invention may further comprise at least one filler. The fillers may be selected from those well known to those skilled in the art and commonly used in cosmetic compositions. The fillers can be mineral or organic, lamellar or spherical. Mention may be made of talc, mica, silica, kaolin, polyamide powders, such as the nylon sold under the name Orgasol by the company Atochem, poly-13-alanine and polyethylene, and tetrafluoroethylene polymer powders such as Teflon, lauroyl-lysine, starch, boron nitride, expanded polymeric hollow microspheres such as those of polyvinylidene chloride / acrylonitrile such as those sold under the name Expancel by Nobel Industrie, acrylic powders such as such as those marketed under the name Polytrap by Dow Corning, polymethyl methacrylate particles and silicone resin microspheres (Toshiba's Tospearls, for example), precipitated calcium carbonate, carbonate and hydro-carbonate. magnesium, hydroxyapatite, hollow silica microspheres (MAPRECOS Silica Beads), microcapsules of glass or ceramics e, metal soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, and in particular from 12 to 18 carbon atoms, for example zinc, magnesium or lithium stearate, zinc laurate, magnesium myristate.

  It is also possible to use a compound capable of swelling with heat and in particular thermally expandable particles such as unexpanded microspheres of vinylidene chloride / acrylonitrile / methyl methacrylate copolymer or of acrylonitrile homopolymer copolymer, for example those sold respectively under the references Expancel 820 DU 40 and Expancel 007WU by the company AKZO NOBEL. The fillers may represent from 0.1 to 25%, in particular from 1 to 20% by weight relative to the total weight of the composition.

  Waxes The composition according to the invention may comprise at least one wax. The wax considered in the context of the present invention is generally a lipophilic compound, solid at room temperature (25 ° C.), with reversible solid / liquid state change, having a melting point greater than or equal to 30 ° C. up to 200 C and especially up to 120 C. By bringing the wax to the liquid state (fusion), it is possible to make it miscible with oils and form a homogeneous mixture microscopically, but by reducing the temperature at room temperature, a recrystallization of the wax in the oils of the mixture is obtained.

  In particular, the waxes that are suitable for the invention may have a melting point greater than or equal to 45 ° C., and in particular greater than or equal to 55 ° C. For the purposes of the invention, the melting temperature corresponds to the temperature of the peak. the most endothermic observed in thermal analysis (DSC) as described in ISO 11357-3; 1999. The melting point of the wax can be measured using a differential scanning calorimeter (DSC), for example the calorimeter sold under the name MDSC 2920 by the company TA Instruments. The measurement protocol is as follows: A sample of 5 mg of wax placed in a crucible is subjected to a first temperature rise from -20 ° C. to 100 ° C., at a heating rate of 10 ° C./min, and is then cooled. 100 C at -20 C at a cooling rate of 10 C / minute and finally subjected to a second temperature rise from -20 C to 100 C at a heating rate of 5 C / minute. During the second temperature rise, the variation of the power difference absorbed by the empty crucible and the crucible containing the wax sample as a function of temperature is measured. The melting point of the compound is the value of the temperature corresponding to the peak apex of the curve representing the variation of the difference in power absorbed as a function of the temperature.

  The waxes that may be used in the compositions according to the invention are chosen from waxes, solid, at room temperature of animal, vegetable, mineral or synthetic origin, and mixtures thereof. The waxes that can be used in the compositions according to the invention generally have a hardness ranging from 0.01 MPa to 15 MPa, especially greater than 0.05 MPa and in particular greater than 0.1 MPa. The hardness is determined by measuring the compressive strength measured at 20 C using the texturometer sold under the name TA-XT2 by the company RHEO, equipped with a stainless steel cylinder with a diameter of 2 mm moving at the measuring speed of 0.1 mm / s, and penetrating into the wax at a penetration depth of 0.3 mm. The measurement protocol is as follows: The wax is melted at a temperature equal to the melting point of the wax + 10 ° C. The melted wax is cast in a container 25 mm in diameter and 20 mm deep. The wax is recrystallized at room temperature (25 C) for 24 hours so that the surface of the wax is flat and smooth, then the wax is kept for at least 1 hour at 20 C before making the hardness measurement. or sticky. The mobile of the texturometer is moved at a speed of 0.1 mm / s, then penetrates into the wax to a penetration depth of 0.3 mm. When the mobile penetrated into the wax to the depth of 0.3 mm, the mobile is held stationary for 1 second (corresponding to the relaxation time) and is removed at a speed of 0.5 mm / s. The hardness value is the maximum measured compressive force divided by the surface of the texturometer cylinder in contact with the wax. Illustrative waxes suitable for the invention include hydrocarbon waxes such as beeswax, lanolin wax, and Chinese insect waxes; rice bran wax, Carnauba wax, Candelilla wax, Ouricury wax, Alfa wax, berry wax, shellac wax, Japanese wax and sumac wax; montan wax, orange and lemon waxes, microcrystalline waxes, paraffins and ozokerite; polyethylene waxes, waxes obtained by Fisher-Tropsch synthesis and waxy copolymers and their esters.

  There may also be mentioned waxes obtained by catalytic hydrogenation of animal or vegetable oils having linear or branched C8-C32 fatty chains. Among these, there may be mentioned isomerized jojoba oil such as trans isomerized partially hydrogenated jojoba oil manufactured or marketed by DESERT WHALE under the trade reference Iso-Jojoba-50, hydrogenated sunflower oil , hydrogenated castor oil, hydrogenated coconut oil, hydrogenated lanolin oil, and di- (1,1,1-trimethylolpropane) tetrastearate sold under the name Hest 2T-4S by the company HETERENE. Mention may also be made of silicone waxes and fluorinated waxes.

  It is also possible to use the waxes obtained by hydrogenation of castor oil esterified with cetyl alcohol sold under the names Phytowax Ricin 16L64 and 22L73 by the company SOPHIM. Such waxes are described in application FR-A-2792190.

  According to a particular embodiment, the compositions according to the invention may comprise at least one wax, called sticky wax, that is to say having a tack greater than or equal to 0.1 Ns and a hardness less than or equal to 3.5. MPa. The tacky wax used may in particular have a tack ranging from 0.1 Ns to 10 Ns, in particular ranging from 0.1 Ns to 5 Ns, preferably ranging from 0.2 to 5 Ns and better still from 0.3 to 2 Ns

  The stickiness of the wax is determined by measuring the evolution of the force (compressive force) as a function of time, at 20 ° C. according to the protocol indicated above for the hardness. During the relaxation time of 1 s, the force (compressive force) decreases sharply until it becomes zero and then, when the mobile is withdrawn, the force (stretching force) becomes negative and then increases again to the value 0 The tack is the integral of the force vs time curve for the part of the curve corresponding to the negative values of the force. The value of the sticky is expressed in N.s.

  The tacky wax that can be used generally has a hardness of less than or equal to 3.5 MPa, in particular ranging from 0.01 MPa to 3.5 MPa, especially ranging from 0.05 MPa to 3 MPa.

  As the tacky wax, a C20-C40 alkyl (hydroxystearyloxy) stearate (the alkyl group comprising from 20 to 40 carbon atoms), alone or in admixture, can be used.

  Such a wax is in particular sold under the names Kester Wax K 82 P, Hydroxypolyester K 82 P and Kester Wax K 80 P by the company Koster Keunen. In the present invention, it is also possible to use waxes provided in the form of small particles having a dimension expressed in mean effective diameter in volume D [4.3] of the order of 0.5 to 30 micrometers, in particular from 1 to 20 microns, and more particularly from 5 to 10 micrometers, hereinafter referred to as micro waxes. The particle sizes can be measured by various techniques, in particular the light scattering techniques (dynamic and static), the Coulter counter methods, the sedimentation rate measurements (connected to the size via the law of Stokes) and microscopy. These techniques make it possible to measure a particle diameter and for some of them a particle size distribution. Preferably, the sizes and size distributions of the wax particles are measured by static light scattering using a MasterSizer 2000 commercial particle size analyzer from Malvern. The data is processed on the basis of Mie scattering theory. This theory, which is accurate for isotropic particles, makes it possible to determine, in the case of non-spherical particles, an effective particle diameter. This theory is particularly described in the work of Van de Hulst, H.C., "Light Scattering by Small Particles," Chapters 9 and 10, Wiley, New York, 1957.

  The size is expressed by the mean "effective" diameter in volume D [4.3], defined as follows: D [4.3] = where V; represents the volume of particles of effective diameter d ;. This parameter is described in particular in the technical documentation of the granulometer.

  The effective diameter is obtained by taking a refractive index of 1.33 for water and an average refractive index of 1.42 for the particles. As micro-waxes that can be used in the compositions according to the invention, mention may be made in particular of carnauba micro-waxes, such as that marketed under the name MicroCare 350 by the company Micro Powders, and synthetic wax micro-waxes such as that marketed under the name MicroEase 114S by the company MICRO POWDERS, the micro waxes consisting of a mixture of carnauba wax and polyethylene wax such as those sold under the names Micro Care 300 and 310 by the company MICRO POWDERS, micro waxes consisting of a mixture of carnauba wax and synthetic wax such as that sold under the name Micro Care 325 by the company Micro Powders, the polyethylene micro-waxes such as those sold under the names Micropoly 200, 220, 220L and 250S by the company MICRO POWDERS and micro-waxes of polytetrafluoroethylene such those marketed under the names Microslip 519 and 519 L by the company MICRO POWDERS.

  The composition according to the invention may comprise a wax content ranging from 0.1 to 50% by weight relative to the total weight of the composition, in particular it may contain from 0.5 to 35% by weight; better from 1 to 20% by weight. According to one embodiment, the composition according to the invention comprising less than 10% by weight, preferably less than 5%, better still less than 3%, and even more preferably less than 2% by weight of wax relative to the total weight of the composition. The composition may be wax free.

Aras pasty body

  Pasty fatty substance is understood to mean a lipophilic fatty compound containing, at a temperature of 23 ° C., a liquid fraction and a solid fraction.

  Said pasty compound preferably has a hardness at 20C ranging from 0.001 to 0.5 MPa, preferably from 0.002 to 0.4 MPa. The hardness is measured according to a method of penetration of a probe into a sample of compound and in particular using a texture analyzer (for example TA-XT2i from Rhéo) equipped with a stainless steel cylinder. 2 mm in diameter. The hardness measurement is carried out at 20 C in the center of 5 samples. The cylinder is introduced into each sample at a pre-speed of 1 mm / sec and then at a measurement speed of 0.1 mm / s, the penetration depth being 0.3 mm. The measured value of the hardness is that of the maximum peak. The liquid fraction of the pasty compound, measured at 23 ° C., preferably represents 9 to 97% by weight of the compound. This liquid fraction at 23 ° C is preferably between 15 and 85%, more preferably between 40 and 85% by weight. The liquid fraction by weight of the pasty compound at 23 ° C. is equal to the ratio of the enthalpy of fusion consumed at 23 ° C. on the heat of fusion of the pasty compound. The heat of fusion of the pasty compound is the enthalpy consumed by the compound to pass from the solid state to the liquid state. The pasty compound is said to be in the solid state when the entirety of its mass is in crystalline solid form. The pasty compound is said to be in a liquid state when all of its mass is in liquid form. The enthalpy of fusion of the pasty compound is equal to the area under the curve of the thermogram obtained using a differential scanning calorimeter (DS C), such as the calorimeter sold under the name MDSC 2920 by the company TA instrument, with a rise in temperature of 5 or 10 C per minute, according to the standard ISO 11357-3: 1999. The enthalpy of fusion of the pasty compound is the amount of energy required to pass the compound from the solid state to the liquid state. It is expressed in J / g. The enthalpy of fusion consumed at 23 ° C. is the quantity of energy absorbed by the sample to change from the solid state to the state present at 23 ° C. consisting of a liquid fraction and a solid fraction. . The liquid fraction of the pasty compound measured at 32 ° C is preferably 30 to 100% by weight of the compound, preferably 80 to 100%, more preferably 90 to 100% by weight of the compound. When the liquid fraction of the pasty compound measured at 32 C is equal to 100%, the temperature of the end of the melting range of the pasty compound is less than or equal to 32 C. The liquid fraction of the pasty compound measured at 32 C is equal to the ratio of the enthalpy of fusion consumed at 32 C on the enthalpy of fusion of the pasty compound. The enthalpy of fusion consumed at 32 ° C. is calculated in the same way as the heat of fusion consumed at 23 ° C.

  Paste bodies are generally hydrocarbon compounds such as lanolines and their derivatives or PDMSs.

  Aqueous Phase The composition according to the invention may comprise water and / or water-soluble solvent (s) which may be introduced as such into the formulation according to the invention or may be incorporated therein. bias, one or more ingredients constituting said composition. Thus water may be introduced into the composition in particular by introducing latex or pseudolatex, that is to say aqueous dispersion of polymer particles. The water-miscible solvent (miscibility in water greater than 50% by weight at 25 ° C.) is especially the lower monoalcohols having from 1 to 5 carbon atoms such as ethanol, isopropanol and the glycols having from 1 to 5 carbon atoms. 2 to 8 carbon atoms such as propylene glycol, ethylene glycol, 1,3-butylene glycol, dipropylene glycol, C3-C4 ketones, C2-C4 aldehydes and mixtures thereof. Advantageously, the composition has a content of water / or water-soluble solvent (s) less than or equal to 15% by weight relative to the total weight of the composition, preferably less than or equal to 10% by weight, better less than or equal to 5% by weight, more preferably less than or equal to 3% by weight

  According to one embodiment, the composition according to the invention is free of water (anhydrous composition).

  Fibers The composition according to the invention may further comprise fibers which make it possible to improve the lengthening effect. By fiber, it is necessary to understand an object of length L and of diameter D such that L is much greater than D, D being the diameter of the circle in which the section of the fiber is inscribed. In particular, the L / D ratio (or form factor) is chosen in the range from 3.5 to 2500, in particular from 5 to 500, and more particularly from 5 to 150. The fibers that can be used in the composition of the The invention may be fibers of synthetic or natural, mineral or organic origin. They can be short or long, unitary or organized, for example braided, hollow or full. Their shape can be any and in particular of circular or polygonal section (square, hexagonal or octagonal) depending on the specific application envisaged. In particular, their ends are blunt and / or polished to avoid injury. In particular, the fibers have a length ranging from 1 μm to 10 mm, in particular from 0.1 mm to 5 mm and more particularly from 0.3 mm to 3.5 mm. Their section may be in a circle with a diameter ranging from 2 nm to 500 μm, in particular ranging from 100 nm to 100 μm and more particularly from 1 μm to 50 μm. The weight or titer of the fibers is often given in denier or decitex and represents the weight in gram for 9 km of yarn. The fibers according to the invention may in particular have a title chosen in the range from 0.15 to 30 denier and in particular from 0.18 to 18 denier.

  The fibers that can be used in the composition of the invention may be chosen from rigid or non-rigid fibers, they may be of synthetic or natural origin, mineral or organic. Furthermore, the fibers may or may not be treated on the surface, coated or uncoated, colored or unstained.

  As fibers that can be used in the composition according to the invention, mention may be made of non-rigid fibers such as polyamide (nylon) fibers or rigid fibers such as polyimide-amide fibers such as those sold under the names KERMEL, KERMEL TECH by Rhodia or poly- (p-phenylene terephthalamide) (or aramid) sold especially under the name Kevlar by the company DuPont de Nemours.

  The fibers may be present in the composition according to the invention in a content ranging from 0.01% to 10% by weight, relative to the total weight of the composition, in particular from 0.1% to 5% by weight, and more particularly from 0.3% to 3% by weight.

  Cosmetic active agents As cosmetic active agents that can be used in the compositions according to the invention, mention may in particular be made of antioxidants, preservatives, perfumes, neutralizers, emollients, moisturizers, vitamins and especially solar filters.

  Of course, those skilled in the art will take care to choose any additional additives and / or their amount so that the advantageous properties of the composition according to the invention are not, or not substantially impaired by the addition envisaged. The composition before expansion can be in the form of suspension, dispersion, solution, gel. Preparation process

  The compositions used in the invention may be prepared by processes for mixing, stirring or dispersing compressed gases such as air, chlorofluorocarbon compounds, nitrogen, carbon dioxide, carbon dioxide, carbon dioxide and the like. oxygen, helium, a method of mixing and stirring in the presence of a foaming agent such as a surfactant. In particular, the composition is prepared by mixing, generally hot, the ingredients with stirring and expansion under the action of a gas, the gas can be introduced during the cooling step of the composition, or after preparation of the composition, for example using a Mondomix-type herringbone, a Kenwood-type mixer, a scraped-surface exchanger or a dynamic mixer (of the IMT type, for example). The gas is preferably air or nitrogen.

  The composition according to the invention may be packaged in a container defining at least one compartment which comprises said composition, said container being closed by a closure element. The container may be equipped with a member for dispensing said product. In particular, the container may be equipped with a pump. The container can be a jar.

  The container may be at least partly made of thermoplastic material. Examples of thermoplastic materials include polypropylene or polyethylene. Alternatively, the container is made of non-thermoplastic material, in particular glass or metal (or alloy).

  The composition can be applied to the finger or using an applicator.

  The container is preferably associated with an applicator comprising at least one application element configured to apply the composition to the keratin materials.

  According to another advantageous embodiment, the applicator comprises an applicator tip.

EXAMPLES

  The following examples are presented for illustrative and not limiting of the invention. Unless otherwise indicated, the amounts are given as a percentage by weight. EXAMPLES 1 Unstained polyamide composition with terminal ester group polyamide ("UNICLEAR 100" V from Arizona Chemical) Isononyl isononanoate 80 Operating Procedure In a double shell beaker, the oily structurant and the 80 C with stirring deflocculating blade type. The molten mixture is poured into a Mondomix-type whipper using a peristaltic pump at a rate of 6 kg / h; the inlet temperature of the mixture shows 57 C and the product is swollen in the mixer head which is thermostated at 20 C

  At the outlet of the whipper, the foam, the temperature of which is 30 ° C., is packaged in tanks which are immediately placed for 20 minutes in a chamber thermostated at -28 ° C.

  The parameters of density and rate of expansion of the composition were measured according to the protocols described above.

15 Density before expansion 0.85 Density after expansion 0.75 Rate of expansion 15%

Claims (35)

  Cosmetic composition in the form of a foam comprising a continuous oily phase and at least one structuring agent for the oily phase chosen from polyamide polymers.   2. Composition according to claim 1, characterized in that it has a density less than or equal to 0.95.   3. Composition according to claim 2, characterized in that it has a density less than or equal to 0.9, better, less than or equal to 0.8.   4. Composition according to claim 2 or 3, characterized in that it has a density greater than or equal to 0.2, and better still greater than or equal to 0.3.   5. Composition according to one of the preceding claims, characterized in that it has an expansion rate greater than or equal to 10%. 20   6. Composition according to claim 5, characterized in that it has an expansion rate of less than 350%.   7. Composition according to claim 5 or 6, characterized in that it has a degree of expansion ranging from 10% to 300%, preferably from 30% to 250% and better still from 40% to 200%.   8. Composition according to one of the preceding claims, characterized in that the structuring agent (s) of the oily phase are present in a content ranging from 1 to 60% by weight relative to the total weight of the composition, more preferably 0, 5 to 50% by weight and more preferably 1 to 40% by weight.   9. Composition according to one of the preceding claims, characterized in that the structuring agent of the oily phase is chosen from polyamide polymers comprising a) a polymeric backbone, having hydrocarbon-based repeating units provided with at least one non-pendant amide unit and optionally b) at least one pendant fatty chain and / or at least one optionally functionalized fatty chain, comprising at least 4 carbon atoms and being bonded to these hydrocarbon units.   10. Composition according to the preceding claim, characterized in that the fatty chains represent from 40 to 98% and better still from 50 to 95% of the total number of amide units and fatty chains.   11. Composition according to one of Claims 9 or 10, characterized in that the fatty chains comprise from 6 to 120 carbon atoms, and better still from 8 to 120 carbon atoms.   12. Composition according to one of Claims 9 to 11, characterized in that the pendant fatty chains are bonded directly to at least one of the nitrogen atoms of the amide units.   13. Composition according to one of claims 9 to 12, characterized in that the average molar mass of the polyamide is less than 100,000.   14. Composition according to one of Claims 9 to 13, characterized in that the average molecular weight of the polyamide ranges from 1000 to 100,000, preferably from 1,000 to 50,000, and better still from 1,000 to 30,000.   15. Composition according to one of the preceding claims, characterized in that the terminal fatty chain or chains are bonded to the backbone by linking groups.   16. Composition according to claim 15, characterized in that the linking groups are ester groups.   17. Composition according to one of claims 9 to 16, characterized in that the or the fatty chains comprise from 12 to 68 carbon atoms.   18. Composition according to one of claims 9 to 17, characterized in that the polyamide is chosen from polyamides of formula (A): 25R'4 R'4 C-R'2 II N-R'3 NOOR ## STR2 ## is an integer ranging from 1 to 30, R '' represents at each occurrence independently a fatty chain and is selected from an alkyl or alkenyl group having at least 1 carbon atom and especially 4 to 24 carbon atoms; - Ri2, represents at each occurrence independently a hydrocarbon radical comprising from 1 to 52 carbon atoms; R 13 represents, independently at each occurrence, an organic group comprising at least one atom chosen from carbon, hydrogen and nitrogen atoms, provided that R 13 comprises at least 3 carbon atoms; R 1 represents at each occurrence independently: a hydrogen atom, an alkyl group comprising from 1 to 10 carbon atoms or a direct bond to at least one group selected from R 13 and another R 14 so that when said group is another R'4, the nitrogen atom to which R13 and R14 are bonded is part of a heterocyclic structure defined by R14-NR13, with the proviso that at least 50% of the R14 are hydrogen, and L represents a linking group chosen from ester, ether, amine, urea, urethane, thioester, thioether, thiurea and thiourethane groups, optionally substituted with at least one R '' group as defined above.   19. Composition according to one of Claims 9 to 18, characterized in that the polyamide is chosen from polyamides of the following formula (B): ## STR1 ## wherein m represents an integer number of amide units such that the number of ester groups represents from 10% to 50% of the total number of ester and amide groups; R 'is at each occurrence independently an alkyl or alkenyl group having at least 4 carbon atoms and in particular 4 to 24 carbon atoms; R2 represents independently at each occurrence a C4-C42 hydrocarbon group provided that 50% of the R2 groups represent a C30-C42 hydrocarbon group; - R3 independently represents an organic group provided with at least 2 carbon atoms, hydrogen atoms and optionally one or more oxygen or nitrogen atoms; and R 4 represents, independently at each occurrence, a hydrogen atom, a C 1 -C 4 alkyl group or a direct bond to R 3 or another R 4 so that the nitrogen atom to which are bonded at the same time R3 and R4 form part of a heterocyclic structure defined by R4-N-R3, with at least 50% of R4 representing a hydrogen atom.   20. Composition according to any one of the preceding claims, characterized in that the continuous oily phase comprises at least one oil selected from volatile or non-volatile oils.   21. Composition according to any one of the preceding claims, characterized in that the continuous oily phase comprises at least one non-volatile hydrocarbon oil.   22. Composition according to one of the preceding claims, characterized in that it comprises at least one ester oil selected from esters of monocarboxylic acids with monoalcohols and polyalcohols. 30   23. A composition according to claim 22, characterized in that said ester has the following formula: R, -CO-O-R2 where - R, represents a linear or branched alkyl radical of 1 to 40 carbon atoms, preferably of 7 to 19 carbon atoms, optionally comprising one or more ethylenic double bonds, and optionally substituted, -R 2 represents a linear or branched alkyl radical of 1 to 40 carbon atoms, preferably of 3 to 30 carbon atoms and better from 3 to 20 carbon atoms, optionally comprising one or more ethylenic double bonds, and optionally substituted.   24. A composition according to claim 22 or 23, characterized in that the ester oil is chosen from the following compounds: isononyl isononanoate, cetostearyl octanoate, isopropyl myristate, ethyl palmitate. 2-hexyl, octyl 2-dodecyl stearate, octyl 2-dodecyl erucate, isostearyl isostearate and heptanoates, octanoates, decanoates or ricinoleates of alcohols or polyalcohols.   25. Composition according to any one of claims 22 to 24, characterized in that the oily phase comprises from 0.5 to 100% by weight, in particular from 1 to 80%, especially from 2 to 50% and more particularly from 2 to 40% of the ester oil (es).   26. Composition according to any one of the preceding claims, characterized in that the continuous oily phase comprises at least one volatile oil.   27. Composition according to the preceding claim, characterized in that the volatile oil is hydrocarbon.   28. Composition according to one of the preceding claims, characterized in that the continuous oily phase represents from 10 to 95% of the total weight of the composition, preferably from 20 to 85% and better still from 40 to 80%. 25   29. Composition according to any one of the preceding claims, characterized in that it has a content of water / or water-soluble solvent (s) less than or equal to 15% by weight relative to the total weight of the composition, preferably less than or equal to 10% by weight, more preferably less than or equal to 5% by weight, more preferably less than or equal to 3% by weight.   30. Composition according to any one of claims 1 to 28, characterized in that it is anhydrous. 35   31. Composition according to one of the preceding claims, characterized in that it comprises at least one wax or pasty fatty substance.   32. Composition according to Claim 31, characterized in that the wax or the pasty fatty substance is present in a content ranging from 0.1 to 50% by weight relative to the total weight of the composition, in particular from 0.5 to 35% by weight.   33. A process for coating keratin materials comprising applying to said keratinous materials at least one layer of at least one composition according to any one of claims 1 to 32.   34. A process for coating keratin materials comprising applying to said keratinous materials at least one layer of at least one cosmetic composition in the form of a foam comprising a continuous oily phase and at least one structuring agent for the oily phase chosen from polyamide polymers.   35. Kit for makeup and / or non-therapeutic care of keratin materials, comprising: a container containing a composition in the form of a foam having a continuous oily phase and at least one structuring agent for the oily phase chosen from polyamide polymers and; applicator comprising at least one application element configured to apply the composition to the keratin materials.