WO2024089164A1

WO2024089164A1 - Cosmetic packaging article comprising a solid composition comprising a starch phosphate

Info

Publication number: WO2024089164A1
Application number: PCT/EP2023/079906
Authority: WO
Inventors: Christelle MORVAN-GUILLO; Andreia TEIXEIRA
Original assignee: L'oreal
Priority date: 2022-10-26
Filing date: 2023-10-26
Publication date: 2024-05-02
Also published as: FR3141333A1

Abstract

The present invention relates to a packaging article comprising a polymer- based multilayer envelope defining a cavity, and a solid composition comprising a starchy phosphate, said composition being contained in the cavity defined by the envelope. The invention also relates to a process for cosmetic treatment of keratin materials, in particular human keratin fibres such as the hair, using such a packaging article, and also to the use of said packaging article for caring for keratin materials, in particular human keratin fibres such as the hair.

Description

Cosmetic packaging article comprising a solid composition comprising a starch phosphate The present invention relates to a packaging article comprising a polymer- based multilayer envelope defining a cavity, and a solid composition comprising a starch phosphate, said composition being contained in the cavity defined by the envelope. The invention also relates to a process for cosmetic treatment of keratin materials, in particular human keratin fibres such as the hair, using such a packaging article, and also to the use of said packaging article for caring for keratin materials, in particular human keratin fibres such as the hair. In the field of hair hygiene, products for caring for (or conditioning) keratin fibres are generally intended to condition said fibres in order to provide them with good cosmetic properties. Conventional products, such as conditioners, are usually in more or less thickened liquid form. However, on account of their liquid texture, these products may have various drawbacks, and may notably prove to be difficult to measure out. The reason for this is that the more liquid they are, the greater their tendency to escape between the fingers, making them difficult to measure out and leading to waste. These products may also escape from their packaging, which is a source of inconvenience to the consumer when these products come into contact with clothing or objects, for example when travelling. In order to modify the texture of these products, and notably to make it more compact, thickeners are generally used. However, the addition of these compounds usually comes at the expense of the cosmetic effects of the compositions. The use of these thicker compositions moreover necessitates a large amount of rinsing water in order to remove the surplus of product on the fibres. Now, in many countries where access to water is restricted, the rinsing time and consequently the amount of water required to properly rinse off the product are key indicators of the working qualities of a composition. In order to overcome some of these problems, novel solid cosmetic formulations, notably conditioners in the form of solid granules or powder, have been developed. Such formulations are described, for example, in US 2021/007960. However, these novel formulations are not always entirely satisfactory. Those which are in loose powder form may, indeed, pose problems of volatility, uptake and/or measuring out. Those in the form of agglomerates, such as granules for example, may have a tendency to break up or disintegrate with difficulty in the presence of water, adversely affecting their use and their spreading on the keratin fibres, and do not always make it possible to obtain satisfactory care. They may also be difficult to remove on rinsing and may occasionally even leave residues on the fibres, which the consumer finds unpleasant. Conditioners in powder or particle form may lose fluidity during storage due to the agglutination of the individual solid particles with each other, which may have a negative impact on the working qualities. These formulations may also not be entirely satisfactory in terms of cosmetic performance qualities, notably in terms of suppleness, feel, softness, disentangling, smoothness and sheen. Thus, there is a real need to provide a packaging article comprising a composition in solid form and having an improved environmental profile, in particular linked to the reduction in the use of plastic and to the reduction of pollution related to transport. The packaging article must also be easy to grip, allow easy storage of the composition it contains, and allow easy metering of the composition. The packaging article and the composition contained therein must dissolve and disintegrate easily. The composition must also confer satisfactory cosmetic properties, notably in terms of suppleness, feel, softness, sheen and disentangling, in particular when it is in the form of a hair care composition, such as a conditioner. It has now been discovered that a particular packaging article comprising a solid composition comprising at least one starch phosphate makes it possible to achieve the objectives set out above, and in particular to be easy to grip and to dissolve and disintegrate easily, without lumps, without leaving residues on the hair after rinsing. A subject of the present invention is thus a packaging article comprising: - an envelope defining at least one cavity, the envelope being composed of at least two layers assembled together in order to form just one unit film, the first layer comprising at least 60% by weight, relative to the total weight of the first layer, of one or more compounds chosen from cellulose-based polymers, plant fibres and mixtures thereof, and the second layer comprising nearly 75% by weight, relative to the total weight of the second layer, of one or more vinyl alcohol polymers, - a solid composition comprising one or more starch phosphates, it being understood that said solid composition is in at least one of the cavities defined by the envelope. This packaging article notably solves the problems of measuring out of the solid composition. It also facilitates its storage and transportation. In particular, the packaging article of the invention affords better protection of the composition against moisture. The packaging article of the invention dissolves easily and rapidly in water, and thus requires little water while being used. The presence of a starch phosphate makes it possible notably to improve the dissolution of the packaging article and of the solid composition which it comprises. Furthermore, this packaging mode is particularly advantageous, for example, when travelling or performing a sporting activity (lightened bags, limited risks of leakage, reduced waste). The packaging article, when it comprises several cavities, can also make it possible to provide, for example, a shampoo and a conditioner in the same article. In addition, this composition contained in the article disintegrates rapidly on contact with water and makes it possible, where appropriate, to readily and quickly obtain a creamy, thick, non-tacky composition, comparable to a conventional liquid conditioner composition. This composition can then be easily and uniformly spread on the keratin fibres. Moreover, the composition of the invention rinses out rapidly without leaving unpleasant residues on the fibres and gives them a natural, clean feel after rinsing. Fibres treated with the composition of the invention also have good cosmetic properties, notably in terms of softness, suppleness and feel. They also have good strand separation and are thus easier to disentangle. The invention also relates to a cosmetic treatment process, notably for caring for keratin fibres, in particular human keratin fibres such as the hair, comprising a step of using at least one packaging article as defined above. Other subjects, characteristics, aspects and advantages of the invention will emerge even more clearly on reading the description and the example that follows. In the text hereinbelow, unless otherwise indicated, the limits of a range of values are included in that range, particularly in the expressions “between” and “ranging from ... to ...”. Moreover, the expression “at least one” used in the present description is equivalent to the expression “one or more”. In addition, terms such as “first” or “second” used in the present application do not imply a sequence or an order, unless clearly indicated by the context. Packaging article The present invention notably relates to a packaging article comprising: - an envelope defining at least one cavity, the envelope being composed of at least two layers assembled together in order to form just one unit film, the first layer comprising at least 60% by weight, relative to the total weight of the first layer, of one or more compounds chosen from cellulose-based polymers, plant fibres and mixtures thereof, and the second layer comprising at least 75% by weight, relative to the total weight of the second layer, of one or more vinyl alcohol polymers. Preferably, the packaging article is a cosmetic packaging article. The term “cosmetic packaging article” means an article that is suitable for cosmetic use; in particular for use of the packaging article on keratin materials, notably the hair, and/or on the scalp. In particular, the packaging article makes it possible to wash and/or condition the keratin fibres, in particular human keratin fibres such as the hair. Preferably, the packaging article according to the invention is water-soluble at a temperature of less than or equal to 35°C. Preferably, the envelope of the packaging article according to the invention is water-soluble at a temperature of less than or equal to 35°C. Preferably, the first layer and/or the second layer of the envelope are water-soluble at a temperature of less than or equal to 35°C. The term “water-soluble” means soluble in water, in particular in a proportion of at least 10 grams per litre of water, preferably at least 20 g/l, better still at least 50 g/l, at a temperature of less than or equal to 35°C. Thus, when water preferably having a temperature of less than or equal to 35°C is added to the packaging article, the envelope dissolves and releases the solid composition present in one of the cavities of the envelope. The term “temperature of less than or equal to 35°C” means a temperature not exceeding 35°C but greater than or equal to 0°C, for example ranging from more than 1 to 35°C, preferably from 5 to 30°C, more preferentially from 10 to 30°C and better still from 15 to 25°C. It is understood that all the temperatures are given at atmospheric pressure (1 atm). The packaging article may comprise one or more cavities, at least one of which contains the solid composition as defined hereinbelow. Preferably, the packaging article comprises only one cavity in which the solid composition is contained. The envelope of the packaging article preferably has a breakup time, measured at 10°C, of between 1 and 7 seconds, more preferentially of between 2 and 6 seconds. The compound(s) chosen from cellulose-based polymers and plant fibres The first layer of the packaging article according to the invention comprises one or more compounds chosen from cellulose-based polymers, plant fibres and mixtures thereof, present in a content of greater than or equal to 60% by weight relative to the total weight of the first layer. By way of plant fibres, use may be made of wood pulp. By way of cellulose-based polymers, mention may be made of celluloses and cellulose derivatives, which may be anionic, cationic, amphoteric or non-ionic. Cellulose ethers, cellulose esters and cellulose ether esters are distinguished among these cellulose derivatives. Among the cellulose esters, mention may be made of inorganic esters of cellulose (cellulose nitrates, sulfates or phosphates), organic esters of cellulose (cellulose monoacetates, triacetates, amidopropionates, acetatebutyrates, acetatepropionates or acetatetrimellitates), and mixed organic/inorganic esters of cellulose, such as cellulose acetatebutyrate sulfates and cellulose acetatepropionate sulfates. Among the cellulose ester ethers, mention may be made of hydroxypropyl methyl cellulose phthalates and ethyl cellulose sulfates. Among the non-ionic cellulose ethers that may be mentioned are alkylcelluloses such as methylcelluloses and ethylcelluloses (for example Ethocel Standard 100 Premium from Dow Chemical); hydroxyalkylcelluloses such as hydroxymethylcelluloses and hydroxyethylcelluloses (for example Natrosol 250 HHR sold by Aqualon) and hydroxypropylcelluloses (for example Klucel EF from Aqualon); mixed hydroxyalkyl-alkylcelluloses such as hydroxypropylmethylcelluloses (for example Methocel E4M from Dow Chemical), hydroxyethylmethylcelluloses, hydroxyethylethylcelluloses (for example Bermocoll E 481 FQ from Akzo Nobel) and hydroxybutylmethylcelluloses. Mention may be made, among the anionic cellulose ethers, of carboxyalkylcelluloses and their salts. Examples that may be mentioned include carboxymethylcelluloses, carboxymethylmethylcelluloses (for example Blanose 7M from Aqualon) and carboxymethylhydroxyethylcelluloses, and also the sodium salts thereof. Among the cationic cellulose ethers, mention may be made of crosslinked or non-crosslinked quaternized hydroxyethylcelluloses. The quaternizing agent may particularly be diallyldimethylammonium chloride (for example Celquat L200 from National Starch). Another cationic cellulose ether that may be mentioned is hydroxypropyltrimethylammonium hydroxyethyl cellulose (for example Ucare Polymer JR 400 from Amerchol). Mention may also be made of celluloses or derivatives thereof, modified with groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups or mixtures thereof in which the alkyl groups are of C₈-C₂₂; non-ionic alkylhydroxyethylcelluloses such as the products Natrosol Plus Grade 330 CS and Polysurf 67 (C₁₆ alkyl) sold by Aqualon; quaternized alkylhydroxyethylcelluloses (cationic), such as the products Quatrisoft LM 200, Quatrisoft LM-X 529-18-A, Quatrisoft LM-X 529-18-B (C₁₂ alkyl) and Quatrisoft LM-X 529-8 (C₁₈ alkyl) sold by Amerchol, the products Crodacel QM and Crodacel QL (C₁₂ alkyl) and Crodacel QS (C₁₈ alkyl) sold by Croda, and the product Softcat SL 100 sold by Amerchol; non-ionic nonoxynylhydroxyethylcelluloses such as the product Amercell HM-1500 sold by Amerchol; non-ionic alkylcelluloses such as the product Bermocoll EHM 100 sold by Berol Nobel. Preferably, the compound(s) chosen from cellulose-based polymers, plant fibres and mixtures thereof are chosen from wood pulp, carboxymethylcelluloses, and also the sodium salts thereof, and mixtures thereof. Preferably, the compounds chosen from cellulose-based polymers, plant fibres and mixtures thereof are present in the first layer in a content of greater than or equal to 70% by weight, more preferentially greater than or equal to 75% by weight, even more preferentially greater than or equal to 80% by weight, better still greater than or equal to 90% by weight and even better still greater than or equal to 95% by weight, relative to the total weight of the first layer. Advantageously, the first layer has a thickness of between 50 and 125 µm, preferably between 60 end 85 µm, more preferentially between 65 and 80 µm. Advantageously, the first layer has a water uptake of between 1.5% and 4.5%, preferably between 2% and 4%, and more preferentially between 2.5% and 3.5%, relative to the initial weight of the layer. The method for measuring the water uptake is described in document WO 2017/218449. The water capacity is measured with a DVS (Dynamic apour Sorption) instrument of SPS-DVS type (model SPSx-^-High load with permeability kit) from ProUmid. DVS uses gravimetric analysis to determine moisture sorption/desorption and is entirely automated. The measurements are carried out at 20°C. The relative humidity (RH) is fixed at 35% (35% RH) for 6 h and then gradually brought to 50% (50% RH) over the course of 5 minutes. The relative humidity is then left at 50% for 12 hours. The total measurement time is 18 hours. The water uptake (or %Dm) represents the relative variation in the mass relative to the initial weight of the layer or of the film, that is to say that 10% reflects a temp sent increase in the weight of the layer or of the film relative to the initial weight. The water uptake (or %Dm gained on the cycle at 50% HR during the fixed time of 12 hours at 20°C) is calculated by the difference of the value %Dm at 50% HR (final value measured at 50% HR) minus %Dm at 35% HR (final value before increasing to 50% HR). Advantageously, the first layer has a breaking strength of between 40 and 80 N, preferably between 50 and 70 N. Vinyl alcohol polymer(s) The second layer of the packaging article according to the invention comprises one or more vinyl alcohol polymers, present in a content of greater than or equal to 75% by weight relative to the total weight of the second layer. The vinyl alcohol polymers of formula CH₂=CHOH result from the total or partial hydrolysis of vinyl acetate polymers CH₂=CHOC(O)CH₃. Thus, the second layer preferably comprises one or more copolymers of vinyl alcohol and vinyl acetate. The degree of hydrolysis of the vinyl acetate polymers is preferably greater than or equal to 75%, more preferentially greater than or equal to 80%. The weight-average molecular mass of said polymer, measured by light scattering, is preferably less than or equal to 100000 g/mol, more preferentially less than or equal to 80000 g/mol, and even more preferentially less than or equal to 60 000 g/mol. The polymer(s) of the second layer have a polydispersity index of preferably less than or equal to 2, more preferentially less than or equal to 1.5. Preferably, the vinyl alcohol polymer(s) are present in the second layer in a content of greater than or equal to 80% by weight, more preferentially greater than or equal to 85% by weight, even more preferentially greater than or equal to 90% by weight, better still greater than or equal to 95% by weight, relative to the total weight of the second layer. Advantageously, the second layer has a thickness of between 8 and 25 µm, preferably between 10 end 20 µm, more preferentially between 12 and 17 µm. Advantageously, the second layer as a water uptake of between 2% and 6%, preferably between 3% and 5%, and more preferentially between 3.5% and 4.5%, relative to the initial weight of the layer. Advantageously, the second layer has a breaking strength of between 5 and 20 N, preferably between 10 and 15 N. Polyols The first layer and/or the second layer of the packaging article according to the invention can optionally also comprise one or more plasticizers, notably chosen from polyols. The plasticizer(s) chosen from polyols that are optionally present in the first layer and/or the second layer are preferably chosen from glycerol, polyethylene glycols and mixtures thereof, and more particularly the product called PEG-6 or PEG-8 in the CTFA (International Cosmetic Ingredient Dictionary, Seventh Edition) publication. Other polyols that may be used in the first layer and/or the second layer are those described in the section relating to the solid composition hereinafter. Preferably, the molecular weight (MW) of said polyol(s) optionally present in the first layer and/or the second layer is between 50 and 350, more preferentially between 60 and 200 and even better still between 70 and 100. When they are present in the first layer, the total content of the plasticizer(s) preferably ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight, and even more preferentially from 1% to 5% by weight, relative to the total weight of the first layer. When they are present in the first layer, the total content of the polyol(s) preferably ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight, and even more preferentially from 1% to 5% by weight, relative to the total weight of the first layer. When they are present in the second layer, the total content of the plasticizer(s) preferably ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight, and even more preferentially from 1% to 5% by weight, relative to the total weight of the second layer. When they are present in the second layer, the total content of the polyols(s) preferably ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight, and even more preferentially from 1% to 5% by weight, relative to the total weight of the second layer. Preferably, the first layer and/or the second layer comprise one or more plasticizers, notably chosen from polyols. Fillers The first layer and/or the second layer of the packaging article according to the invention can optionally also comprise one or more fillers. The fillers are defined and more thoroughly described in the section relating to the solid composition hereinafter. The fillers) that may be used in the first and/or the second layer can be chosen from mineral fillers, non-polymeric organic fillers, polymeric organic fillers, and mixtures thereof. Among the fillers that may be used, mention may particular be made of starches, alginates and celluloses. When they are present in the first layer, the total content of the filler(s) preferably ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 12% by weight, and even more preferentially from 1% to 10% by weight, relative to the total weight of the first layer. When they are present in the second layer, the total content of the filler(s) preferably ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 12% by weight, and even more preferentially from 1% to 10% by weight, relative to the total weight of the second layer. Preferably, the first layer and/or the second layer comprise one or more fillers. Preferentially, the first layer comprises one or more plasticizers, notably chosen from polyols, and one or more fillers. Preferentially, the second layer comprises one or more plasticizers, notably chosen from polyols, and one or more fillers. The first layer and the second layer can optionally also comprise additional compounds, such as stabilizers and/or colouring agents (soluble dyes, insoluble pigments). Advantageously, the first layer has a thickness greater than that of the second. Preferably, the total thickness of the unit film formed by the first layer and the second layer is greater than or equal to 60 µm, more preferentially greater than or equal to 65 µm, even more preferentially greater than or equal to 70 µm. Advantageously, the water uptake of the second layer is greater than the water uptake of the first layer. Preferably, the difference between the water uptake of the second layer and the water uptake of the first layer is greater than or equal to 1%. Advantageously, the breaking strength of the first layer is greater than the breaking strength of the second layer. Preferably, the difference between the breaking strength of the first layer and the breaking strength of the second layer is greater than or equal to 10 MPa, more preferentially greater than or equal to 20 MPa. Advantageously, the ratio between the weight of the first layer and the weight of the second layer ranges from 25/75 to 75/25, preferably from 30/70 to 70/30, more preferentially from 35/65 to 65/35, even more preferentially from 45/55 to 55/45. The first layer and the second layer are assembled together in order to form just one unit film. This unit film makes it possible to define the envelope of the packaging article according to the invention. The term “film” is intended to mean notably a continuous layer preferentially formed from one or more polymers as defined above, in particular water-soluble polymers. It is understood that the invention is not limited to an envelope formed by a single first layer and a single second layer. In particular, the envelope of the packaging article can comprise several first layers and/or several second layers. In these embodiments, the combination of the first and second layers is assembled so as to form just one unit film. The main industrial methods for the production of polymer films are extrusion of a molten polymer, casting of a solution of a polymer onto a polished metal surface (in certain cases, the polymer solution is introduced into a precipitation tank), casting of a dispersion of the polymer onto a polished surface, and calendering. The films that may be used according to the present invention may be chosen from film-multilayer film, film-paper (laminating) and film-coating. During application by spraying, brushing or various industrial processes, the surface coatings undergo what is known as the formation of a film, and notably of a film-coating. In the majority of the film-forming processes, a liquid coating of relatively low viscosity is applied to a solid substrate and is hardened as a solid adherent film based on high molecular weight polymer having the properties desired by the user. The assembly of the different layers together can be carried out by applying heat, for example using a heating lamp or a heating roll. Preferably, the second layer is adhesive. In this way, the first and second layer can adhere together to form the unit film. Particularly preferably, the second layer is adhesive on one of the faces thereof. In this case, the first layer is assembled on this adhesive face of the second layer. In a first embodiment of the invention, the first layer is formed and then covered with the second layer. In another embodiment of the invention, the second layer is formed and then covered with the first layer. In these embodiments of the invention, the layer covered can be subjected to a treatment to promote adhesion of the layer which covers it, such as a corona and/or plasma surface treatment, the use of a tie layer between the layers of the present films, the application of an adhesive, and/or texturing methods. Preferably, the film(s) defined by the layers are sealed so as to form one or more cavities which will comprise the solid composition defined hereinafter and will prevent it from escaping. In one particular embodiment, the first layer forms the exterior and the second layer forms the interior of the envelope of the packaging article. In another particular embodiment, the first layer forms the interior and the second layer forms the exterior of the envelope of the packaging article. The packaging article, and also the envelope, may have any shape that is suitable for the intended use, for example a square, rectangular, round or oval shape. Preferably, it has a rounded geometry, for example in the form of a sphere, a disc or an oval, or else a square or parallelepipedal geometry preferably with rounded corners. The envelope preferably has dimensions allowing it to be taken up between at least two fingers. Thus, it may, for example, have an ovoid shape about 2 to 10 cm long and about 0.5 to 4 cm wide, or a circular disc shape about 2 to 10 cm in diameter, or a square shape with a side length of about 2 to 15 cm, or a rectangular shape with a length of about 2 to 25 cm, it being understood that it may have any other shape and size that are suitable for the intended use. Preferably, the envelope may be of round shape with an inside diameter ranging from 2 to 7 cm, more preferentially from 4 to 5 cm; to which may be added the dimension of the edges (sealed part) which may range from 1 to 5 mm, better still from 2 to 4 mm; and a height ranging from 2 to 7 mm, preferentially from 3 to 5 mm. The envelope may also be of square or rectangular shape with a length preferably ranging from 2 to 7 cm, more preferentially from 3 to 5 cm, and a width preferably ranging from 2 to 5 cm, more preferentially 2.5 to 4 cm; to which may be added the dimension of the edges (sealed part) which may preferably range from 1 to 5 mm, and more preferentially from 2 to 4 mm. The area delimiting the cavity or cavities has an extent advantageously less than 625 cm², preferably between 0.025 cm² and 400 cm², more preferentially between 1 and 200 cm², better still between 2 and 50 cm² and even better still between 4 and 25 cm², so as to have optimised compacting of the composition. It has been observed that when the area of the article is within the above ranges, the compacting of the solid composition made of powder is lower and the transformation of the powder into a fluid composition in the hands is easier, without any formation of agglomerates. Preferably, the height of the envelope is greater than or equal to 2 mm, more preferentially ranging from 2 to 10 mm and better still from 3 to 7 mm. The first layer and/or the second layer can optionally comprise indications in printed form or in the form of thermal relief, or be the subject of a stamp. Preferably, when they are present, said indications are on the layer forming the outer part of the envelope, and more preferentially on the external surface of said layer forming the outer part of the envelope. Solid composition The packaging article according to the invention also comprises a solid composition comprising one or more starch phosphates, said composition being in at least one of the cavities defined by the envelope. Preferably, the solid composition according to the invention (final composition, after drying) has a water activity of less than 0.75, better still less than 0.72, even better still less than 0.70. The water activity, Aw, represents the proportion of bound water to free water that is conducive to the development of microorganisms. The value ranges between 0 and 1. The activity is 0 for a totally dry product and 1 for pure water. The solid composition according to the invention may comprise water added during its preparation and/or water which may originate from the starting materials used during the preparation of said composition. The solid composition according to the invention may be in the form of a powder, a paste, particles (for example spherical particles such as small balls or granules), a compressed tablet, a stick or a bar. Preferably, the composition according to the invention is in the form of a powder or of particles. The term “powder” means a composition in pulverulent form, which is preferably essentially free of dust (or fine particles). In other words, the particle size distribution of the particles is such that the weight content of particles which have a size of less than or equal to 50 µm (content of fines), preferably less than or equal to 45 µm (content of fines) is advantageously less than or equal to 5% by weight, preferably less than 3% by weight and more particularly less than 1% by weight, relative to the total weight of particles (particle size evaluated using a Retsch AS 200 Digit particle size analyser; oscillation height: 1.25 mm/screening time: 5 minutes). The term "paste" is understood to mean a composition having a viscosity of greater than 0.5 Pa.s (5 poises) and preferably greater than 1 Pa.s (10 poises), measured at 25°C and at a shear rate of 1 s⁻¹ ; this viscosity possibly being determined by means of a cone-plate rheometer. The term “particles” means small fractionated objects formed from solid particles that are aggregated together, of variable shapes and sizes. They may be in regular or irregular form. They may in particular be in spherical form (such as granules, granulates or beads) or in square, rectangular or elongated form such as sticks. Spherical particles are most particularly preferred. Advantageously, the solid composition is in the form of a powder. Advantageously, the size of the powders or particles is, in its largest dimension, between 30 µm and 5 mm, more particularly between 45 µm and 2 mm, better still between 50 µm and 1 mm and even better still between 60 and 700 µm. Advantageously, the solid composition is in powder form, the size of the powders being, in the largest dimension thereof, between 30 µm and 5 mm, more particularly between 45 µm and 2 mm, better still between 50 µm and 1 mm and even better still between 60 and 700 µm. When the solid composition according to the invention is not in powder or particle form, it advantageously has a penetration force at 25°C and 1 atm of greater than or equal to 200 g, preferably greater than or equal to 300 g, more preferentially greater than or equal to 400 g and better still greater than or equal to 500 g. The penetration force is determined by penetrometry. The texture analysis measurements are performed at 25°C using a Stable Micro Systems TA.XT Plus texturometer. The penetrometry experiments are performed with a metal rod equipped with a screwed end piece, said end piece being a P/2N needle of 2 mm for the top part, connected to the measuring head. The piston penetrates into the sample at a constant speed of 1 mm/s, to a depth of 5 mm. The force exerted on the piston is recorded and the mean value of the force is calculated. The solid composition according to the invention can be in the form of a compressed solid composition, in particular compressed using a manual or mechanical press. Preferably, the hardness of the compressed solid composition is between 10 and 300 N, more preferentially between 15 and 200 N, and even better still between 15 and 100 N. The density of the solid composition according to the present invention is preferably between 0.1 and 1, more preferentially between 0.2 and 0.8, and even better still between 0.3 and 0.6. A given amount (mass, m) of powder is placed in a measuring cylinder. The measuring cylinder is then automatically tapped 2500 times. The volume (v) thus obtained is read on the measuring cylinder and the density (d) is then determined according to the formula d = m/v. Starch phosphates The solid composition contained in the packaging article according to the invention comprises one or more starch phosphates. The starch phosphates can be obtained by crosslinking, with phosphorus compounds, monostarch phosphates (of the type St-O-PO-(OX)₂), distarch phosphates (of the type St-O-PO-(OX)-O-St) or even tristarch phosphates (of the type St-O-PO- (O-St)₂) or mixtures thereof ; with St meaning starch and X notably denoting alkali metals (for example sodium or potassium), alkaline-earth metals (for example calcium or magnesium), ammonia salts, amine salts such as salts of monoethanolamine, diethanolamine, triethanolamine or 3-amino-1,2-propanediol, and ammonium salts derived from basic amino acids such as lysine, arginine, sarcosine, ornithine or citrulline. The phosphorus compounds may be, for example, sodium tripolyphosphate, sodium orthophosphate, phosphorus oxychloride or sodium trimetaphosphate. Preferably, the starch phosphate(s) are chosen from distarch phosphates such as the product sold under the references Prejel VA-70-T AGGL (gelatinized hydroxypropyl cassava distarch phosphate), Prejel TK1 (gelatinized cassava distarch phosphate) and Prejel 200 (gelatinized acetylated cassava distarch phosphate) by Avebe, or Structure Zea from National Starch (gelatinized corn distarch phosphate). The total content of the starch phosphate(s) preferably ranges from 0.1% to 30% by weight, preferentially from 0.5% to 20% by weight and better still from 2% to 15% by weight, relative to the total weight of the composition. Additional starches The solid composition contained in the packaging article according to the invention can optionally also comprise one or more additional starches. These additional starches are different from the starch phosphates above. The starch molecules that can be used in the present invention may originate from any plant source of starch, notably cereals and tubers; more particularly, they may be starches from corn, rice, cassava, barley, potato, wheat, sorghum, pea, oat or tapioca. It is also possible to use hydrolysates of the starches mentioned above. The starch is preferably derived from corn, potato or rice. The starches may be chemically or physically modified, particularly by one or more of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatments. More particularly, these reactions may be performed in the following manner: - pregelatinization by splitting the starch granules (for example drying and cooking in a drying drum); - oxidation with strong oxidizing agents, resulting in the introduction of carboxyl groups into the starch molecule and resulting in the depolymerization of the starch molecule (for example by treating an aqueous starch solution with sodium hypochlorite); - crosslinking with functional agents that are able to react with the hydroxyl groups of the starch molecules, which will thus be bonded together (for example with glyceryl groups); - esterification in alkaline medium for the grafting of functional groups, notably C₁ to C₆ acyl (acetyl), C₁ to C₆ hydroxyalkyl (hydroxyethyl or hydroxypropyl), carboxymethyl or octenylsuccinic. A preferred starch is a starch that has undergone at least one chemical modification such as at least one esterification. According to the invention, use may also be made of amphoteric starches comprising one or more anionic groups and one or more cationic groups. The anionic and cationic groups can be bonded to the same reactive site of the starch molecule or to different reactive sites; they are preferably bonded to the same reactive site. The anionic groups may be of carboxylic or sulfate type, preferably of carboxylic type. The cationic groups may be of primary, secondary, tertiary or quaternary amine type. The amphoteric starches are notably chosen from the compounds of the following formulae:

in which formulae (VIa) to (IXa): - St-O represents a starch molecule; - R, which may be identical or different, represents a hydrogen atom or a methyl radical; - R’, which may be identical or different, represents a hydrogen atom, a methyl radical or a –C(O)-OH group; - n is an integer equal to 2 or 3; - M, which may be identical or different, denotes a hydrogen atom, an alkali metal or alkaline-earth metal such as Na, K or Li, a quaternary ammonium NH₄, or an organic amine; and - R’’ represents a hydrogen atom or a C₁-C₁₈ alkyl radical. These compounds are in particular described in US 5455340 and US 4017 460. Use is in particular made of the starches of formulae (VIIa) or (VIIIa), and preferentially starches modified with 2-chloroethylaminodipropionic acid, i.e. the starches of formulae (VIIa) or (VIIIa) in which R, R', R'' and M represent a hydrogen atom and n is equal to 2. Preferably, the amphoteric starch is a starch chloroethylamido dipropionate. More preferentially, the additional starch(es) are chosen from unmodified starches, better still from corn starch, potato starch, rice starch and mixtures thereof. Preferably, the solid composition according to the invention comprises one or more additional starches, more preferentially chosen from unmodified starches, better still from corn starch, potato starch, rice starch and mixtures thereof. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the additional starch(es) preferably ranges from 10% to 85% by weight, preferentially from 20% to 80% weight, and even better still from 30% to 75% by weight, relative to the total weight of the composition. The total content of the starch(es), i.e. of the starch phosphate(s) and of the optional additional starch(es), preferably ranges from 10% to 90% by weight, preferentially from 20% to 85% by weight, better still from 30% to 80% by weight and even better still from 40% to 75% by weight relative to the total weight of the composition. Cationic surfactant(s) The solid composition contained in the packaging article according to the present invention can optionally also comprise one or more cationic surfactants. The term "cationic surfactant" is intended to mean a surfactant that is positively charged when it is contained in the compositions according to the invention. This surfactant may bear one or more permanent positive charges or may contain one or more functions that can be cationized in the compositions according to the invention. The cationic surfactants are advantageously chosen from optionally polyoxyalkylenated primary, secondary or tertiary fatty amines, quaternary ammonium salts, and mixtures thereof. As quaternary ammonium salts, mention may notably be made of: ^ the quaternary ammonium salts of formula (Ia):

in which: the groups R₈ to R₁₁, which may be identical or different, represent a linear or branched aliphatic group including from 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl, at least one of the groups R₈ to R₁₁ including from 8 to 30 carbon atoms and preferably from 12 to 24 carbon atoms, it being possible for the aliphatic groups to include heteroatoms notably such as oxygen, nitrogen, sulfur and halogens; and X- is an anion chosen notably from the group of the halides, phosphates, acetates, lactates, (C₁-C₄)alkyl sulfates, and (C₁-C₄)alkylsulfonates or (C₁- C₄)alkylarylsulfonates. The aliphatic groups R₈ to R₁₁ may be chosen from C₁-C₃₀ alkyl, C₁-C₃₀ alkoxy, (C₂-C₆) polyoxyalkylene, C₁-C₃₀ alkylamide, (C₁₂-C₂₂)alkylamido(C₂- C₆)alkyl, (C₁₂-C₂₂)alkyl acetate, and C₁-C₃₀ hydroxyalkyl groups. Mention may notably be made of tetraalkylammonium halides, notably chlorides, such as dialkyldimethylammonium or alkyltrimethylammonium chlorides in which the alkyl group includes from 12 to 22 carbon atoms, in particular behenyltrimethylammonium chloride, distearyldimethylammonium chloride, cetyltrimethylammonium chloride and benzyldimethylstearylammonium chloride. Mention may also be made of palmitylamidopropyltrimethylammonium or stearamidopropyldimethyl-(myristyl acetate)-ammonium halides, and notably chlorides; notably the product sold under the name Ceraphyl® 70 by Van Dyk. ^ the quaternary ammonium salts of imidazoline of formula (IIa):

in which: R₁₂ represents an alkenyl or alkyl group comprising from 8 to 30 carbon atoms, for example derived from tallow fatty acids, R₁₃ represents a hydrogen atom, a C₁-C₄ alkyl group or an alkenyl or alkyl group comprising from 8 to 30 carbon atoms, R₁₄ represents a C₁-C₄ alkyl group, R₁₅ represents a hydrogen atom or a C₁-C₄ alkyl group, X- is an anion notably chosen from the group of halides, phosphates, acetates, lactates, (C₁-C₄)alkyl sulfates, (C₁-C₄)alkylsulfonates or (C₁-C₄)alkylarylsulfonates. Preferably, R₁₂ and R₁₃ denote a mixture of alkenyl or alkyl groups containing from 12 to 21 carbon atoms, for example derived from tallow fatty acids, R₁₄ denotes a methyl group and R₁₅ denotes a hydrogen atom. Such a product is sold, for example, under the name Rewoquat® W75 or W90 by Evonik. ^ the di- or triquaternary ammonium salts of formula (IIIa):

in which: - R₁₆ denotes an alkyl group including from 16 to 30 carbon atoms, which is optionally hydroxylated and/or optionally interrupted with one or more oxygen atoms, - R₁₇ denotes hydrogen, an alkyl group including from 1 to 4 carbon atoms or a group -(CH₂)₃-N⁺(R_16a)(R_17a)(R_18a); R_16a, R_17a and R_18a, which may be identical or different, denoting hydrogen or an alkyl group including from 1 to 4 carbon atoms, - R₁₈, R₁₉, R₂₀ and R₂₁, which may be identical or different, denote hydrogen or an alkyl group including from 1 to 4 carbon atoms, and - X- is an anion, chosen notably from the group of the halides, acetates, phosphates, nitrates, (C₁-C₄)alkyl sulfates, (C₁-C₄)alkylsulfonates and (C₁- C₄)alkylarylsulfonates, in particular methyl sulfate and ethyl sulfate. Such compounds are, for example, Finquat CT-P (Quaternium 89) and Finquat CT (Quaternium 75), sold by Finetex. ^ the quaternary ammonium salts containing one or more ester functions of formula (IVa) below:

in which: - R₂₂ is chosen from C₁-C₆ alkyl groups and C₁-C₆ hydroxyalkyl or dihydroxyalkyl groups, - R₂₃ is chosen from the group R₂₆-C(=O)-; linear or branched, saturated or unsaturated C₁-C₂₂ hydrocarbon-based groups R₂₇; and a hydrogen atom, - R₂₅ is chosen from the group R₂₈-C(=O)-; linear or branched, saturated or unsaturated C₁-C₆ hydrocarbon-based groups R₂₉; and a hydrogen atom, R₂₄, R₂₆ and R₂₈, which may be identical or different, are chosen from linear or branched, saturated or unsaturated C₇-C₂₁ hydrocarbon-based groups, - r, s and t, which may be identical or different, are integers ranging from 2 to 6, - r1 and t1, which may be identical or different, are equal to 0 or 1, - y is an integer ranging from 1 to 10, - x and z, which may be identical or different, are integers ranging from 0 to 10, - X- is an anion, it being understood that r2 + r1 = 2r and t1 + t2 = 2t, and that the sum x + y + z ranges from 1 to 15, with the proviso that when x = 0 then R₂₃ denotes R₂₇ and that when z = 0 then R₂₅ denotes R₂₉. The alkyl groups R₂₂ may be linear or branched, preferably linear. Preferably, R₂₂ denotes a methyl, ethyl, hydroxyethyl or dihydroxypropyl group, and more particularly a methyl or ethyl group. Advantageously, the sum x + y + z is from 1 to 10. When R₂₃ is a hydrocarbon-based group R₂₇, it may comprise from 12 to 22 carbon atoms, or else may comprise from 1 to 3 carbon atoms. When R₂₅ is a hydrocarbon-based group R₂₉, it preferably contains 1 to 3 carbon atoms. Advantageously, R₂₄, R₂₆ and R₂₈, which may be identical or different, are chosen from linear or branched, saturated or unsaturated C₁₁-C₂₁ hydrocarbon-based groups, and more particularly from linear or branched C₁₁-C₂₁ alkyl and alkenyl groups. Preferably, x and z, which may be identical or different, are equal to 0 or 1. Advantageously, y is equal to 1. Preferably, r, s and t, which may be identical or different, are equal to 2 or 3, and even more particularly are equal to 2. The anion X- is preferably a halide, preferably chloride, bromide or iodide, a (C₁-C₄)alkyl sulfate, a (C₁-C₄)alkylsulfonate or a (C₁-C₄)alkylarylsulfonate, a methanesulfonate, a phosphate, a nitrate, a tosylate, an anion derived from organic acid such as an acetate or a lactate or any other anion that is compatible with the ammonium bearing an ester function. The anion X- is more particularly a chloride, a methyl sulfate or an ethyl sulfate. Use is more particularly made, in the composition according to the invention, of the ammonium salts of formula (IVa) in which: - R₂₂ denotes a methyl or ethyl group, - x and y are equal to 1, - z is equal to 0 or 1, - r, s and t are equal to 2, - R₂₃ is chosen from the group R₂₆-C(=O)-; methyl, ethyl or C₁₄-C₂₂ hydrocarbon-based groups, and the hydrogen atom, - R₂₅ is chosen from the group R₂₈-C(=O)-; and a hydrogen atom, - R₂₄, R₂₆ and R₂₈, which may be identical or different, are chosen from linear or branched, saturated or unsaturated C₁₃-C₁₇ hydrocarbon-based groups, and preferably from linear or branched, saturated or unsaturated C₁₃-C₁₇ alkyl and alkenyl groups. Advantageously, the hydrocarbon-based groups are linear. Among the compounds of formula (IVa), mention may be made of the salts, notably the chloride or methyl sulfate of diacyloxyethyldimethylammonium, diacyloxyethylhydroxyethylmethylammonium, monoacyloxyethyldihydroxyethylmethylammonium, triacyloxyethylmethylammonium or monoacyloxyethylhydroxyethyldimethylammonium, and mixtures thereof. The acyl groups preferably have 14 to 18 carbon atoms and originate more particularly from a plant oil such as palm oil or sunflower oil. When the compound contains several acyl groups, these groups may be identical or different. These products are obtained, for example, by direct esterification of triethanolamine, triisopropanolamine, alkyldiethanolamine or alkyldiisopropanolamine, which are optionally oxyalkylenated, with fatty acids or with fatty acid mixtures notably of plant or animal origin, or by transesterification of the methyl esters thereof. This esterification may be followed by quaternization by means of an alkylating agent such as an alkyl halide, preferably methyl or ethyl halide, a dialkyl sulfate, preferably dimethyl or diethyl sulfate, methyl methanesulfonate, methyl para-toluenesulfonate, glycol chlorohydrin or glycerol chlorohydrin. Such compounds are sold, for example, under the names Dehyquart® by Henkel, Stepanquat® by Stepan, Noxamium® by CECA or Rewoquat® WE 18 by Evonik. The composition according to the invention may contain, for example, a mixture of quaternary ammonium monoester, diester and triester salts with a weight majority of diester salts. Use may also be made of the ammonium salts containing at least one ester function that are described in patents US-A-4874554 and US-A-4137 180. Use may also be made of the behenoylhydroxypropyltrimethylammonium chloride sold, for example, by Kao under the name Quartamin BTC 131. Preferably, the ammonium salts containing at least one ester function contain two ester functions. Fatty amines that may be mentioned include amidoamines. The amidoamines according to the invention may be chosen from fatty amidoamines, it being possible for the fatty chain to be borne by the amine group or by the amido group. The term “amidoamine” means a compound comprising at least one amide function and at least one primary, secondary or tertiary amine function. The term “fatty amidoamine” means an amidoamine comprising, in general, at least one C₆-C₃₀ hydrocarbon-based chain. Preferably, the fatty amidoamines of use according to the invention are not quaternized. Preferably, the fatty amidoamines of use according to the invention are not (poly)oxyalkylenated. Among the fatty amidoamines which are useful according to the invention, mention may be made of the amidoamines of formula (Va) below: RCONHR’’N(R’)2 (Va) in which: - R represents a substituted or unsubstituted, linear or branched, saturated or unsaturated monovalent hydrocarbon-based radical containing from 5 to 29 carbon atoms, preferably from 7 to 23 carbon atoms, and in particular a linear or branched C5- C29 and preferably C7-C23 alkyl radical, or a linear or branched C5-C29 and preferably C7-C23 alkenyl radical; - R’’ represents a divalent hydrocarbon-based radical containing less than 6 carbon atoms, preferably from 2 to 4 carbon atoms and better still 3 carbon atoms; and - R’, which are identical or different, represent a substituted or unsubstituted, saturated or unsaturated, linear or branched, monovalent hydrocarbon-based radical containing less than 6 carbon atoms, preferably from 1 to 4 carbon atoms, preferably a methyl radical. The fatty amidoamines of formula (Va) are chosen, for example, from oleamidopropyldimethylamine, stearamidopropyldimethylamine sold by Inolex Chemical Company under the name Lexamine S13, isostearamidopropyldimethylamine, stearamidoethyldimethylamine, lauramidopropyldimethylamine, myristamidopropyldimethylamine, behenamidopropyldimethylamine, dilinoleamidopropyldimethylamine, palmitamidopropyldimethylamine, ricinoleamindopropyldimethylamine, soyamidopropyldimethylamine, avocadoamidopropyldimethylamine, cocamidopropyldimethylamine, minkamidopropyldimethylamine, oatamidopropyldimethylamine, sesamidopropyldimethylamine, tallamidopropyldimethylamine, olivamidopropyldimethylamine, palmitamidopropyldimethylamine, stearamidoethyldiethylamine, brassicamidopropyldimethylamine and mixtures thereof. Preferably, the fatty amidoamines are chosen from oleamidopropyldimethylamine, behenamidopropyldimethylamine, stearamidopropyldimethylamine, brassicamidopropyldimethylamine and mixtures thereof. Preferably, the cationic surfactants i) are chosen from those of formula (Ia), (IVa) or (Va), and better still from the salts of cetyltrimethylammonium, behenyltrimethylammonium, dipalmitoylethylhydroxyethylmethylammonium, oleamidopropyldimethylamine, behenamidopropyldimethylamine, stearamidopropyldimethylamine, brassicamidopropyldimethylamine and mixtures thereof; and more particularly from behenyltrimethylammonium chloride or methosulfate, cetyltrimethylammonium chloride or methosulfate, dipalmitoylethylhydroxyethylmethylammonium chloride or methosulfate, oleamidopropyldimethylamine, behenamidopropyldimethylamine, stearamidopropyldimethylamine, brassicamidopropyldimethylamine and mixtures thereof. Preferably, the solid composition according to the invention comprises one or more cationic surfactants. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the cationic surfactant(s) preferably ranges from 0.01% to 15% by weight, preferentially from 0.1% to 10% by weight, better still from 0.5% to 8% by weight, and even better still from 1% to 5% by weight, relative to the total weight of the composition. Fatty substance The solid composition contained in the packaging article according to the present invention may optionally also comprise one or more fatty substances, which are preferably liquid. The term “fatty substance” means an organic compound that is insoluble in water at 25°C and at atmospheric pressure (1.013×10⁵ Pa) (solubility of less than 5% by weight, preferably less than 1% by weight and even more preferentially less than 0.1% by weight). They have in their structure at least one hydrocarbon-based chain comprising at least 6 carbon atoms and/or a sequence of at least two siloxane groups. In addition, the fatty substances are generally soluble in organic solvents under the same temperature and pressure conditions, for instance chloroform, dichloromethane, carbon tetrachloride, ethanol, benzene, toluene, tetrahydrofuran (THF), liquid petroleum jelly or decamethylcyclopentasiloxane. The fatty substances that may be used in the present invention are neither (poly)oxyalkylenated nor (poly)glycerolated. “Nonsilicone fatty substance” means a fatty substance not containing any Si- O bonds, and “silicone fatty substance” means a fatty substance containing at least one Si-O bond. Useful fatty substances according to the invention may be liquid fatty substances (or oils) and/or solid fatty substances. A liquid fatty substance is understood to be a fatty substance having a melting point of less than or equal to 25°C at atmospheric pressure (1.013×10⁵ Pa). A solid fatty substance is understood to be a fatty substance having a melting point of greater than 25°C at atmospheric pressure (1.013×10⁵ Pa). For the purposes of the present invention, the melting point corresponds to the temperature of the most endothermic peak observed on thermal analysis (differential scanning calorimetry or DSC) as described in the standard ISO 11357-3; 1999. The melting point may be measured using a differential scanning calorimeter (DSC), for example the calorimeter sold under the name "MDSC 2920" by TA Instruments. In the present patent application, all the melting points are determined at atmospheric pressure (1.013×10⁵ Pa). More particularly, the liquid fatty substance(s) according to the invention may be chosen from C₆ to C₁₆ liquid hydrocarbons, liquid hydrocarbons comprising more than 16 carbon atoms, nonsilicone oils of animal origin, oils of triglyceride type of plant or synthetic origin, fluoro oils, liquid fatty alcohols, liquid fatty acid and/or fatty alcohol esters other than triglycerides, and silicone oils, and mixtures thereof. It is recalled that the fatty alcohols, esters and acids more particularly have at least one saturated or unsaturated, linear or branched hydrocarbon-based group comprising from 6 to 40 and better still from 8 to 30 carbon atoms, which is optionally substituted, in particular with one or more hydroxyl groups (in particular 1 to 4). If they are unsaturated, these compounds may comprise one to three conjugated or unconjugated carbon-carbon double bonds. As regards the C₆ to C₁₆ liquid hydrocarbons, the latter may be linear, branched, or optionally cyclic, and are preferably chosen from alkanes. Examples that may be mentioned include hexane, cyclohexane, undecane, dodecane, isododecane, tridecane or isoparaffins, such as isohexadecane or isodecane, and mixtures thereof. The liquid hydrocarbons comprising more than 16 carbon atoms may be linear or branched, and of mineral or synthetic origin, and are preferably chosen from liquid paraffins or liquid petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam®, and mixtures thereof. As hydrocarbon oils (or non-silicone oils) of animal origin, mention may be made of perhydrosqualene. The triglyceride oils of plant or synthetic origin are preferably chosen from liquid fatty acid triglycerides comprising from 6 to 30 carbon atoms, for instance heptanoic or octanoic acid triglycerides, or alternatively, for example, sunflower oil, corn oil, soybean oil, marrow oil, grapeseed oil, sesame oil, hazelnut oil, apricot oil, macadamia nut oil, arara oil, castor oil, avocado oil, caprylic/capric acid triglycerides, for instance those sold by Stearineries Dubois or those sold under the names Miglyol® 810, 812 and 818 by Dynamit Nobel, jojoba oil and shea butter oil, and mixtures thereof. As regards the fluoro oils, they may be chosen from perfluoromethylcyclopentane and perfluoro-1,3-dimethylcyclohexane, sold under the names Flutec® PC1 and Flutec® PC3 by BNFL Fluorochemicals; perfluoro-1,2- dimethylcyclobutane; perfluoroalkanes such as dodecafluoropentane and tetradecafluorohexane, sold under the names PF 5050® and PF 5060® by 3M, or bromoperfluorooctyl sold under the name Foralkyl® by Atochem; nonafluoromethoxybutane and nonafluoroethoxyisobutane; perfluoromorpholine derivatives such as 4-trifluoromethylperfluoromorpholine sold under the name PF 5052® by 3M. The liquid fatty alcohols that are suitable for use in the invention are more particularly chosen from linear or branched, saturated or unsaturated alcohols, preferably unsaturated or branched alcohols, comprising from 6 to 40 carbon atoms, preferably from 8 to 30 carbon atoms. These fatty alcohols are neither oxyalkylenated nor glycerolated. Examples that may be mentioned include octyldodecanol, 2- butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, isostearyl alcohol, oleyl alcohol, linolenyl alcohol, ricinoleyl alcohol, undecylenyl alcohol and linoleyl alcohol, and mixtures thereof. Preferably, oleyl alcohol will be used. As regards the liquid esters of fatty acids and/or of fatty alcohols other than the triglycerides mentioned above, mention may be made in particular of esters of saturated or unsaturated, linear C₁ to C₂₆ or branched C₃ to C₂₆ aliphatic monoacids or polyacids and of saturated or unsaturated, linear C₁ to C₂₆ or branched C₃ to C₂₆ aliphatic monoalcohols or polyalcohols, the total carbon number of the esters being greater than or equal to 6 and more advantageously greater than or equal to 10. Preferably, for the esters of monoalcohols, at least one from among the alcohol and the acid is branched. Among the monoesters, mention may be made of dihydroabietyl behenate; octyldodecyl behenate; isocetyl behenate; isostearyl lactate; lauryl lactate; linoleyl lactate; oleyl lactate; isostearyl octanoate; isocetyl octanoate; octyl octanoate; decyl oleate; isocetyl isostearate; isocetyl laurate; isocetyl stearate; isodecyl octanoate; isodecyl oleate; isononyl isononanoate; isostearyl palmitate; methyl acetyl ricinoleate; octyl isononanoate; 2-ethylhexyl isononanoate; octyldodecyl erucate; oleyl erucate; ethyl and isopropyl palmitates, such as 2-ethylhexyl palmitate, 2-octyldecyl palmitate; alkyl myristates such as isopropyl myristate; isobutyl stearate; 2-hexyldecyl laurate, and mixtures thereof. Preferably, among the monoesters of monoacids and of monoalcohols, use will be made of ethyl and isopropyl palmitates, alkyl myristates such as isopropyl myristate or ethyl myristate, isocetyl stearate, 2-ethylhexyl isononanoate, isodecyl neopentanoate and isostearyl neopentanoate, and mixtures thereof. Esters of C₄ to C₂₂ dicarboxylic or tricarboxylic acids and of C₁ to C₂₂ alcohols and esters of mono-, di- or tricarboxylic acids and of C₂ to C₂₆ di-, tri-, tetra- or pentahydroxy alcohols may also be used. Mention may particularly be made of: diethyl sebacate; diisopropyl sebacate; diisopropyl adipate; di-n-propyl adipate; dioctyl adipate; diisostearyl adipate; dioctyl maleate; glyceryl undecylenate; octyldodecyl stearoyl stearate; pentaerythrityl monoricinoleate; pentaerythrityl tetraisononanoate; pentaerythrityl tetrapelargonate; pentaerythrityl tetraisostearate; pentaerythrityl tetraoctanoate; propylene glycol dicaprylate; propylene glycol dicaprate; tridecyl erucate; triisopropyl citrate; triisostearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate; propylene glycol dioctanoate; neopentyl glycol diheptanoate; diethylene glycol diisononanoate; polyethylene glycol distearates, and mixtures thereof. The composition may also comprise, as fatty ester, sugar esters and diesters of C₆ to C₃₀, preferably C₁₂ to C₂₂, fatty acids. It is recalled that “sugar” means oxygen- containing hydrocarbon-based compounds bearing several alcohol functions, with or without aldehyde or ketone functions, and which comprise at least 4 carbon atoms. These sugars may be monosaccharides, oligosaccharides or polysaccharides other than the anionic polysaccharides described hereinbelow. Examples of suitable sugars that may be mentioned include sucrose, glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose and lactose, and derivatives thereof, particularly alkyl derivatives, such as methyl derivatives, for instance methylglucose. The sugar esters of fatty acids may be chosen notably from the group comprising the esters or mixtures of esters of sugars described previously and of linear or branched, saturated or unsaturated C₆ to C₃₀ and preferably C₁₂ to C₂₂ fatty acids. If they are unsaturated, these compounds may comprise one to three conjugated or unconjugated carbon-carbon double bonds. The esters may also be chosen from monoesters, diesters, triesters, tetraesters and polyesters, and mixtures thereof. These esters may be, for example, oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, linolenates, caprates, arachidonates or mixtures thereof, particularly such as the mixed oleo-palmitate, oleo-stearate and palmito-stearate esters. More particularly, use is made of monoesters and diesters and notably sucrose, glucose or methylglucose mono- or di-oleates, stearates, behenates, oleopalmitates, linoleates, linolenates and oleostearates, and mixtures thereof. Mention may be made, by way of example, of the product sold under the name Glucate® DO by Amerchol, which is a methylglucose dioleate. The silicone oils that may be used in the composition according to the present invention may be volatile or non-volatile, cyclic, linear or branched silicone oils, which are unmodified or modified with organic groups, and preferably have a viscosity from 5×10^-6 to 2.5 m²/s at 25°C, and preferably 1×10^-5 to 1 m²/s. Preferably, the silicone oils are chosen from polydialkylsiloxanes, particularly polydimethylsiloxanes (PDMS), and liquid polyorganosiloxanes comprising at least one aryl group. These silicone oils may also be organomodified. The organomodified silicone oils that may be used in accordance with the invention are preferably liquid silicones as defined previously that comprise in their structure one or more organofunctional groups attached via a hydrocarbon-based group, chosen, for example, from amine groups and alkoxy groups. Organopolysiloxanes are defined in greater detail in Walter Noll’s Chemistry and Technology of Silicones (1968), Academic Press. They may be volatile or non- volatile. When they are volatile, the silicone oils are more particularly chosen from those with a boiling point of between 60°C and 260°C, and even more particularly from: (i) cyclic polydialkylsiloxanes comprising from 3 to 7 and preferably from 4 to 5 silicon atoms. These are, for example, octamethylcyclotetrasiloxane, particularly sold under the name Volatile Silicone® 7207 by Union Carbide or Silbione® 70045 V2 by Rhodia, decamethylcyclopentasiloxane sold under the name Volatile Silicone® 7158 by Union Carbide, and Silbione® 70045 V5 by Rhodia, and mixtures thereof. Mention may also be made of cyclocopolymers of the dimethylsiloxane/methylalkylsiloxane type, such as Volatile Silicone® FZ 3109 sold by Union Carbide. Mention may also be made of mixtures of cyclic polydialkylsiloxanes with organic silicon-derived compounds, such as the mixture of octamethylcyclotetrasiloxane and tetra(trimethylsilyl)pentaerythritol (50/50) and the mixture of octamethylcyclotetrasiloxane and oxy-1,1'-bis(2,2,2',2',3,3'- hexatrimethylsilyloxy)neopentane; (ii) linear volatile polydialkylsiloxanes containing 2 to 9 silicon atoms and having a viscosity of less than or equal to 5×10^-6 m²/s at 25°C. An example is decamethyltetrasiloxane notably sold under the name SH 200 by Toray Silicone. Silicones falling within this category are also described in the article published in Cosmetics and Toiletries, Vol. 91, Jan. 76, pages 27-32, Todd & Byers Volatile Silicone Fluids for Cosmetics. Non-volatile polydialkylsiloxanes are preferably used. These silicone oils are more particularly chosen from polydialkylsiloxanes, among which mention may be made mainly of polydimethylsiloxanes bearing trimethylsilyl end groups. The viscosity of the silicones is measured at 25°C according to the standard ASTM 445 Appendix C. Mention may be made, among these polydialkylsiloxanes, in a non-limiting way, of the following commercial products: - the Silbione® oils of the 47 and 70047 series or the Mirasil® oils sold by Rhodia, for instance the oil 70047 V 500000; - the oils of the Mirasil® series sold by Rhodia; - the oils of the 200 series from Dow Corning, such as DC200 with a viscosity of 60000 mm²/s; - the Viscasil® oils from General Electric and certain oils of the SF series (SF 96, SF 18) from General Electric. Mention may also be made of polydimethylsiloxanes bearing dimethylsilanol end groups, known under the name dimethiconol (CTFA), such as the oils of the 48 series from Rhodia. The organomodified silicones that may be used in accordance with the invention are silicones as defined previously that comprise in their structure one or more organofunctional groups attached via a hydrocarbon-based group. As regards the liquid polyorganosiloxanes comprising at least one aryl group, they may particularly be polydiphenylsiloxanes, and polyalkylarylsiloxanes functionalized by the abovementioned organofunctional groups. The polyalkylarylsiloxanes are particularly chosen from linear and/or branched polydimethyl/methylphenylsiloxanes and polydimethyl/diphenylsiloxanes with a viscosity ranging from 1×10^-5 to 5×10^-2 m²/s at 25°C. Among these polyalkylarylsiloxanes, mention may be made, by way of example, of the products sold under the following names: - the Silbione® oils of the 70641 series from Rhodia; - the oils of the Rhodorsil® 70633 and 763 series from Rhodia; - the oil Dow Corning 556 Cosmetic Grade Fluid from Dow Corning; - the silicones of the PK series from Bayer, such as the product PK20; - the silicones of the PN and PH series from Bayer, such as the products PN1000 and PH1000; - certain oils of the SF series from General Electric, such as SF 1023, SF 1154, SF 1250 and SF 1265. Among the organomodified silicones, mention may be made of polyorganosiloxanes comprising: - substituted or unsubstituted amine groups, such as the products sold under the names GP 4 Silicone Fluid and GP 7100 by Genesee or the products sold under the names Q28220 and Dow Corning 929 or 939 by Dow Corning. The substituted amine groups are, in particular, C₁ to C₄ aminoalkyl groups; - alkoxylated groups, - hydroxyl groups. The silicones which can be used are preferably amino silicones. The term “amino silicone” denotes any silicone including at least one primary, secondary or tertiary amine or a quaternary ammonium group. The weight-average molecular masses of these amino silicones may be measured by gel permeation chromatography (GPC) at ambient temperature (25°C), as polystyrene equivalent. The columns used are µ styragel columns. The eluent is THF and the flow rate is 1 ml/min.200 µl of a 0.5% by weight solution of silicone in THF are injected. Detection is carried out with a refractometer and a UV meter. Preferably, the amino silicone(s) that may be used in the context of the invention are chosen from: a) the polysiloxanes corresponding to formula (A):

in which x’ and y’ are integers such that the weight-average molecular weight (Mw) is between 5000 and 500000 approximately; b) the amino silicones corresponding to formula (B): R’_aG_3-a-Si(OSiG₂)_n-(OSiG_bR’_2-b)_m-O-SiG_3-a-R’_a (B) in which: - G, which is identical or different, denotes a hydrogen atom or a group from among phenyl, OH, C₁-C₈ alkyl, for example methyl, or C₁-C₈ alkoxy, for example methoxy; - a, which is identical or different, denotes 0 or an integer from 1 to 3, in particular 0, - b denotes 0 or 1, in particular 1, - m and n are numbers such that the sum (n + m) ranges from 1 to 2000 and in particular from 50 to 150, it being possible for n to denote a number from 0 to 1999 and particularly from 49 to 149, and it being possible for m to denote a number from 1 to 2000 and particularly from 1 to 10; - R', which may be identical or different, denotes a monovalent radical of formula -C_qH_2qL in which q is a number ranging from 2 to 8 and L is an optionally quaternized amino group chosen from the following groups: -N(R")₂; -N⁺(R")₃ A-; -NR"-Q-N(R")₂ and -NR"-Q-N⁺(R")₃ A-, in which R”, which is identical or different, denotes hydrogen, phenyl, benzyl, or a saturated monovalent hydrocarbon-based radical, for example a C₁-C₂₀ alkyl radical; Q denotes a linear or branched group of formula C_rH_2r, r being an integer ranging from 2 to 6, preferably from 2 to 4; and A- represents a cosmetically acceptable anion, particularly a halide such as fluoride, chloride, bromide or iodide. Preferably, the amino silicones are chosen from the amino silicones of formula (B). Preferably, the amino silicones of formula (B) are chosen from the amino silicones corresponding to formulae (C), (D), (E), (F), (G) and/or (K) below. Thus, the amino silicones corresponding to formula (B) can be chosen from, alone or as a mixture: A/ the "trimethylsilyl amodimethicone” silicones corresponding to formula (C):

in which m and n are numbers such that the sum (n + m) ranges from 1 to 2000 and in particular from 50 to 150, it being possible for n to denote a number from 0 to 1999 and particularly from 49 to 149, and it being possible for m to denote a number from 1 to 2000 and particularly from 1 to 10. B/ the silicones of formula (D) below:

in which: - m and n are numbers such that the sum (n + m) ranges from 1 to 1000, in particular from 50 to 250 and more particularly from 100 to 200; it being possible for n to denote a number from 0 to 999, particularly from 49 to 249 and more particularly from 125 to 175, and it being possible for m to denote a number from 1 to 1000, particularly from 1 to 10 and more particularly from 1 to 5; - R₁, R₂ and R₃, which are identical or different, represent a hydroxyl or C₁- C₄ alkoxy radical, at least one of the radicals R₁ to R₃ denoting an alkoxy radical. Preferably, the alkoxy radical is a methoxy radical. The hydroxyl/alkoxy mole ratio preferably ranges from 0.2:1 to 0.4:1 and preferably from 0.25:1 to 0.35:1 and more particularly is equal to 0.3:1. The weight-average molecular mass (Mw) of these silicones preferably ranges from 2000 to 1000000 and more particularly from 3500 to 200000.

in which: - p and q are numbers such that the sum (p + q) ranges from 1 to 1000, in particular from 50 to 350 and more particularly from 150 to 250; p possibly denoting a number from 0 to 999, notably from 49 to 349 and more particularly from 159 to 239, and q possibly denoting a number from 1 to 1000, notably from 1 to 10 and more particularly from 1 to 5; - R₁ and R₂, which are different, represent a hydroxyl or C₁-C₄ alkoxy radical, at least one of the radicals R₁ or R₂ denoting an alkoxy radical. Preferably, the alkoxy radical is a methoxy radical. The hydroxyl/alkoxy mole ratio generally ranges from 1:0.8 to 1:1.1 and preferably from 1:0.9 to 1:1 and more particularly is equal to 1:0.95. The weight-average molecular mass (Mw) of the silicone preferably ranges from 2000 to 200 000, even more particularly from 5000 to 100 000 and more particularly from 10000 to 50000. The commercial products comprising silicones of structure (D) or (E) may include in their composition one or more other amino silicones the structure of which is other than formula (D) or (E). A product containing amino silicones of structure (D) is sold by Wacker under the name Belsil® ADM 652. A product containing amino silicones of structure (E) is sold by Wacker under the name Fluid WR 1300®. When these amino silicones are used, one particularly advantageous embodiment consists in using them in the form of an oil-in-water emulsion. The oil- in-water emulsion may comprise one or more surfactants. The surfactants may be of any nature but are preferably cationic and/or non-ionic. The number-average size of the silicone particles in the emulsion generally ranges from 3 nm to 500 nm. Preferably, notably as amino silicones of formula (E), use is made of microemulsions with a mean particle size ranging from 5 nm to 60 nm (limits included) and more particularly from 10 nm to 50 nm (limits included). Thus, use may be made according to the invention of the amino silicone microemulsions of formula (E) sold under the names Finish CT 96 E® or SLM 28020® by Wacker. D/ the silicones of formula (F) below:

in which: - m and n are numbers such that the sum (n + m) ranges from 1 to 2000 and in particular from 50 to 150, it being possible for n to denote a number from 0 to 1999 and particularly from 49 to 149, and it being possible for m to denote a number from 1 to 2000 and particularly from 1 to 10; - A denotes a linear or branched alkylene radical having from 4 to 8 carbon atoms and preferably 4 carbon atoms. This radical is preferably linear. The weight-average molecular mass (Mw) of these amino silicones preferably ranges from 2000 to 1000000 and even more particularly from 3500 to 200000. A silicone corresponding to this formula is, for example, Xiameter MEM 8299 Emulsion from Dow Corning; E/ the silicones of formula (G) below:

in which: - m and n are numbers such that the sum (n + m) ranges from 1 to 2000 and in particular from 50 to 150, it being possible for n to denote a number from 0 to 1,999 and particularly from 49 to 149, and it being possible for m to denote a number from 1 to 2000 and particularly from 1 to 10; - A denotes a linear or branched alkylene radical having from 4 to 8 carbon atoms and preferably 4 carbon atoms. This radical is preferably branched. The weight-average molecular mass (Mw) of these amino silicones preferably ranges from 500 to 1000000 and even more particularly from 1000 to 200000. A silicone corresponding to this formula is, for example, DC2-8566 Amino Fluid from Dow Corning; c) the amino silicones corresponding to formula (H):

in which: - R₅ represents a monovalent hydrocarbon-based radical having from 1 to 18 carbon atoms, and in particular a C₁-C₁₈ alkyl or C₂-C₁₈ alkenyl radical, for example methyl; - R₆ represents a divalent hydrocarbon-based radical, notably a C₁-C₁₈ alkylene radical or a divalent C₁-C₁₈, for example C₁-C₈, alkyleneoxy radical linked to the Si via an SiC bond; - Q- is an anion such as a halide ion, notably chloride, or an organic acid salt, notably acetate; - r represents a mean statistical value ranging from 2 to 20 and in particular from 2 to 8; - s represents a mean statistical value ranging from 20 to 200 and in particular from 20 to 50. Such amino silicones are notably described in patent US 4185087. - d) the quaternary ammonium silicones of formula (I):

in which: - R₇, which may be identical or different, represent a monovalent hydrocarbon-based radical having from 1 to 18 carbon atoms, and in particular a C₁- C₁₈ alkyl radical, a C₂-C₁₈ alkenyl radical or a ring comprising 5 or 6 carbon atoms, for example methyl; - R₆ represents a divalent hydrocarbon-based radical, particularly a C₁-C₁₈ alkylene radical or a divalent C₁-C₁₈, for example C₁-C₈, alkyleneoxy radical linked to the Si via an SiC bond; - R₈, which may be identical or different, represent a hydrogen atom, a monovalent hydrocarbon-based radical having from 1 to 18 carbon atoms, and in particular a C₁-C₁₈ alkyl radical, a C₂-C₁₈ alkenyl radical or a -R₆-NHCOR₇ radical; - X- is an anion such as a halide ion, notably chloride, or an organic acid salt, notably acetate; - r represents a mean statistical value ranging from 2 to 200 and in particular from 5 to 100. These silicones are described, for example, in patent EP-A 0530974;

in which: - R₁, R₂, R₃ and R₄, which may be identical or different, denote a C₁-C₄ alkyl radical or a phenyl group, - R₅ denotes a C₁-C₄ alkyl radical or a hydroxyl group, - n is an integer ranging from 1 to 5, - m is an integer ranging from 1 to 5, and - x is chosen such that the amine number ranges from 0.01 to 1 meq/g; f) multiblock polyoxyalkylene amino silicones, of the type (AB)_n, A being a polysiloxane block and B being a polyoxyalkylene block including at least one amine group. Said silicones are preferably constituted of repeating units having the following general formulae: [-(SiMe₂O)_xSiMe₂-R-N(R”)- R’-O(C₂H₄O)_a(C₃H₆O)_b-R’-N(H)-R-] or alternatively [-(SiMe₂O)_xSiMe₂-R-N(R")- R'-O(C₂H₄O)_a(C₃H₆O)_b-] in which: - a is an integer greater than or equal to 1, preferably ranging from 5 to 200 and more particularly ranging from 10 to 100; - b is an integer between 0 and 200, preferably ranging from 4 to 100 and more particularly between 5 and 30; - x is an integer ranging from 1 to 10000 and more particularly from 10 to 5000; - R’’ is a hydrogen atom or a methyl; - R, which are identical or different, represent a linear or branched divalent C₂-C₁₂ hydrocarbon-based radical, optionally including one or more heteroatoms such as oxygen; preferably, R denotes an ethylene radical, a linear or branched propylene radical, a linear or branched butylene radical or a CH₂CH₂CH₂OCH₂CH(OH)CH₂- radical; preferentially, R denotes a CH₂CH₂CH₂OCH₂CH(OH)CH₂- radical; - R’, which are identical or different, represent a linear or branched divalent C₂-C₁₂ hydrocarbon-based radical, optionally including one or more heteroatoms such as oxygen; preferably, R’ denotes an ethylene radical, a linear or branched propylene radical, a linear or branched butylene radical or a CH₂CH₂CH₂OCH₂CH(OH)CH₂- radical; preferentially, R’ denotes -CH(CH₃)-CH₂-. The siloxane blocks preferably represent between 50 mol% and 95 mol% of the total weight of the silicone, more particularly from 70 mol% to 85 mol%. The amine content is preferably between 0.02 and 0.5 meq/g of copolymer in a 30% solution in dipropylene glycol, more particularly between 0.05 and 0.2. The weight-average molecular mass (Mw) of the silicone is preferably between 5000 and 1000000 and more particularly between 10000 and 200000. Mention may particularly be made of the silicones sold under the name Silsoft A-843 or Silsoft A+ by Momentive. g) the alpha, omega-bis-amino silicones corresponding to formula (K) below:

in which: - the R radicals represent, independently of one another, a hydrogen atom, an OH group or a linear or branched C₁-C₄ alkyl group; - the radicals R1, R2, R3 and R4, independently of one another, represent a hydrogen atom, a C₁-C₆ alkyl group or a C₁-C₆ aminoalkyl group; - x is between 0 and 6, y is between 0 and 6, and - n is such that the weight-average molecular weight (Mw) of the amino silicone is between 5000 and 200000 g/mol. Preferably, the radicals R are identical and represent CH₃ (methyl). Preferably, R1, R2, R3 and R4, independently of one another, represent a hydrogen atom, a C₁-C₄, better still C₂-C₄, alkyl group, which is preferably linear and saturated, in particular ethyl; or a C₂-C₄ aminoalkyl group, in particular of structure – (C_aH_2a)-NH₂ with a = 2 to 4; in particular aminoethyl (-CH₂-CH₂-NH₂). Preferably, x is between 1 and 5, better still between 2 and 4, even better still x=3. Preferably, y is between 1 and 5, better still between 2 and 4, even better still Preferably, x=y. Preferably, n is such that the weight-average molecular mass (Mw) of the silicone is between 10000 and 150000 g/mol, or even between 15000 and 100000 g/mol. More preferentially, the amino silicone corresponds to formula (K) in which the R radicals represent a methyl group, x = y = 3 and R1, R2, R3 and R4 represent a hydrogen atom; it is then a bis-aminopropyl dimethicone (INCI name). Preferably, the liquid fatty substance(s) are chosen from plant oils such as those defined above, liquid fatty esters such as those defined above, amino silicones such as amodimethicone and bis-amino silicones, and mixtures thereof. The solid fatty substances preferably have a viscosity of greater than 2 Pa.s, measured at 25°C and at a shear rate of 1 s^-1. The solid fatty substance or substances are preferably chosen from solid fatty alcohols, solid esters of fatty acids and/or fatty alcohols, waxes, ceramides, and mixtures thereof. “Fatty alcohol” means a long-chain aliphatic alcohol comprising from 6 to 40 carbon atoms, preferably from 8 to 30 carbon atoms, and comprising at least one hydroxyl group OH. These fatty alcohols are neither oxyalkylenated nor glycerolated. The solid fatty alcohols may be saturated or unsaturated, and linear or branched, and comprise from 8 to 40 carbon atoms, preferably from 10 to 30 carbon atoms. Preferably, the solid fatty alcohols have the structure R-OH with R denoting a linear alkyl group, optionally substituted with one or more hydroxyl groups, comprising from 8 to 40, preferentially from 10 to 30 carbon atoms, or even from 12 to 24 atoms and even better still from 14 to 22 carbon atoms. The solid fatty alcohols that may be used are preferably chosen from saturated or unsaturated, linear or branched, preferably linear and saturated, (mono)alcohols comprising from 8 to 40 carbon atoms, better still from 10 to 30, indeed even from 12 to 24, carbon atoms, even better still from 14 to 22 carbon atoms. The solid fatty alcohols that may be used may be chosen from, alone or as a mixture: myristyl alcohol (or 1-tetradecanol); cetyl alcohol (or 1-hexadecanol); stearyl alcohol (or 1-octadecanol); arachidyl alcohol (or 1-eicosanol); behenyl alcohol (or 1- docosanol); lignoceryl alcohol (or 1-tetracosanol); ceryl alcohol (or 1-hexacosanol); montanyl alcohol (or 1-octacosanol); and myricyl alcohol (or 1-triacontanol). Preferentially, the solid fatty alcohol is chosen from cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, arachidyl alcohol, and mixtures thereof, such as cetylstearyl alcohol or cetearyl alcohol. Particularly preferably, the solid fatty alcohol is cetylstearyl or cetearyl alcohol. The solid esters of a fatty acid and/or of a fatty alcohol that may be used are preferably chosen from esters derived from a C₉-C₂₆ fatty acid and/or from a C₉-C₂₆ fatty alcohol. Preferably, these solid fatty esters are esters of a linear or branched, saturated carboxylic acid comprising at least 10 carbon atoms, preferably from 10 to 30 carbon atoms and more particularly from 12 to 24 carbon atoms, and of a linear or branched, saturated monoalcohol comprising at least 10 carbon atoms, preferably from 10 to 30 carbon atoms and more particularly from 12 to 24 carbon atoms. The saturated carboxylic acids may optionally be hydroxylated, and are preferably monocarboxylic acids. Esters of C₄-C₂₂ dicarboxylic or tricarboxylic acids and of C₁-C₂₂ alcohols and esters of mono-, di- or tricarboxylic acids and of C₂-C₂₆ di-, tri-, tetra- or pentahydroxylated alcohols may also be used. Mention may particularly be made of octyldodecyl behenate, isocetyl behenate, cetyl lactate, stearyl octanoate, octyl octanoate, cetyl octanoate, decyl oleate, hexyl stearate, octyl stearate, myristyl stearate, cetyl stearate, stearyl stearate, octyl pelargonate, cetyl myristate, myristyl myristate, stearyl myristate, diethyl sebacate, diisopropyl sebacate, diisopropyl adipate, di-n-propyl adipate, dioctyl adipate, dioctyl maleate, octyl palmitate, myristyl palmitate, cetyl palmitate, stearyl palmitate, and mixtures thereof. Preferably, the solid esters of a fatty acid and/or of a fatty alcohol are chosen from C₉-C₂₆ alkyl palmitates, particularly myristyl palmitate, cetyl palmitate and stearyl palmitate; C₉-C₂₆ alkyl myristates, such as cetyl myristate, stearyl myristate and myristyl myristate; C₉-C₂₆ alkyl stearates, particularly myristyl stearate, cetyl stearate and stearyl stearate; and mixtures thereof. For the purposes of the present invention, a wax is a lipophilic compound, which is solid at 25°C and atmospheric pressure, with a reversible solid/liquid change of state, having a melting point of greater than approximately 40°C and which may be up to 200°C, and having anisotropic crystal organization in the solid state. In general, the size of the wax crystals is such that the crystals diffract and/or scatter light, giving the composition that comprises them a more or less opaque cloudy appearance. By bringing the wax to its melting point, it is possible to make it miscible with oils and to form a microscopically homogeneous mixture, but on returning the temperature of the mixture to ambient temperature, recrystallization of the wax, which is microscopically and macroscopically detectable (opalescence), is obtained. In particular, the waxes that are suitable for use in the invention may be chosen from waxes of animal, plant or mineral origin, nonsilicone synthetic waxes, and mixtures thereof. Mention may particularly be made of hydrocarbon-based waxes, such as beeswax, particularly of biological origin, lanolin wax and Chinese insect waxes; rice bran wax, carnauba wax, candelilla wax, ouricury wax, asparto grass wax, berry wax, shellac wax, Japan wax and sumac wax; montan wax, orange wax, lemon wax, microcrystalline waxes, paraffins and ozokerite; polyethylene waxes, the waxes obtained by Fischer-Tropsch synthesis and waxy copolymers, and also esters thereof. Mention may also be made of C₂₀ to C₆₀ microcrystalline waxes, such as Microwax HW. Mention may also be made of the MW 500 polyethylene wax sold under the reference Permalen 50-L Polyethylene. Mention may also be made of waxes obtained by catalytic hydrogenation of animal or plant oils containing linear or branched C₈ to C₃₂ fatty chains. Among these waxes, mention may notably be made of isomerized jojoba oil such as trans-isomerized partially hydrogenated jojoba oil, particularly the product manufactured or sold by Desert Whale under the commercial reference Iso-Jojoba-50®, hydrogenated sunflower oil, hydrogenated castor oil, hydrogenated coconut kernel oil, hydrogenated lanolin oil and bis(1,1,1-trimethylolpropane) tetrastearate, notably the product sold under the name Hest 2T-4S® by Heterene. The waxes obtained by hydrogenation of castor oil esterified with cetyl alcohol, such as those sold under the names Phytowax Castor 16L64® and 22L73® by Sophim, may also be used. A wax that may be also used is a C₂₀ to C₄₀ alkyl (hydroxystearyloxy)stearate (the alkyl group containing from 20 to 40 carbon atoms), alone or as a mixture. Such a wax is particularly sold under the names Kester Wax K 82 P®, Hydroxypolyester K 82 P® and Kester Wax K 80 P® by Koster Keunen. It is also possible to use microwaxes in the compositions of the invention; mention may particularly be made of carnauba microwaxes, such as the product sold under the name MicroCare 350® by Micro Powders, synthetic-wax microwaxes, such as the product sold under the name MicroEase 114S® by Micro Powders, microwaxes constituted of a mixture of carnauba wax and polyethylene wax, such as the products sold under the names Micro Care 300® and 310® by Micro Powders, microwaxes constituted of a mixture of carnauba wax and of synthetic wax, such as the product sold under the name Micro Care 325® by Micro Powders, polyethylene microwaxes, such as the products sold under the names Micropoly 200®, 220®, 220L® and 250S® by Micro Powders, and polytetrafluoroethylene microwaxes, such as the products sold under the names Microslip 519® and 519 L® by Micro Powders. The waxes are preferably chosen from mineral waxes, for instance paraffin, petroleum jelly, lignite or ozokerite wax; plant waxes, for instance cocoa butter or cork fibre or sugar cane waxes, olive tree wax, rice wax, hydrogenated jojoba wax, ouricury wax, carnauba wax, candelilla wax, esparto grass wax, or absolute waxes of flowers, such as the blackcurrant blossom essential wax sold by Bertin (France); waxes of animal origin, for instance beeswaxes or modified beeswaxes (cera bellina), spermaceti, lanolin wax and lanolin derivatives; microcrystalline waxes; and mixtures thereof. Ceramides, or ceramide analogues, such as glycoceramides, that may be used in the compositions according to the invention, are known; mention may in particular be made of ceramides of classes I, II, III and V according to the Dawning classification. The ceramides or analogues thereof that may be used preferably correspond to the following formula: R³CH(OH)CH(CH₂OR²)(NHCOR¹), in which: R¹ denotes a linear or branched, saturated or unsaturated alkyl group, derived from C₁₄-C₃₀ fatty acids, it being possible for this group to be substituted with a hydroxyl group in the alpha position, or a hydroxyl group in the omega position esterified with a saturated or unsaturated C₁₆-C₃₀ fatty acid; R² denotes a hydrogen atom, a (glycosyl)n group, a (galactosyl)m group or a sulfogalactosyl group, in which n is an integer ranging from 1 to 4 and m is an integer ranging from 1 to 8; R³ denotes a C₁₅-C₂₆ hydrocarbon-based group, saturated or unsaturated in the alpha position, this group possibly being substituted with one or more C₁-C₁₄ alkyl groups; it being understood that in the case of natural ceramides or glycoceramides, R³ may also denote a C₁₅-C₂₆ alpha-hydroxyalkyl group, the hydroxyl group being optionally esterified with a C₁₆-C₃₀ alpha-hydroxy acid. The ceramides that are more particularly preferred are the compounds for which R¹ denotes a saturated or unsaturated alkyl derived from C₁₆-C₂₂ fatty acids; R² denotes a hydrogen atom and R³ denotes a saturated linear C₁₅ group. Preferentially, use is made of ceramides for which R¹ denotes a saturated or unsaturated alkyl group derived from C₁₄-C₃₀ fatty acids; R² denotes a galactosyl or sulfogalactosyl group; and R³ denotes a -CH=CH-(CH₂)₁₂-CH₃ group. Use may also be made of the compounds for which R¹ denotes a saturated or unsaturated alkyl radical derived from C₁₂-C₂₂ fatty acids; R² denotes a galactosyl or sulfogalactosyl radical; and R³ denotes a saturated or unsaturated C₁₂-C₂₂ hydrocarbon-based radical and preferably a -CH=CH-(CH₂)₁₂-CH₃ group. As compounds that are particularly preferred, mention may also be made of 2-N-linoleoylaminooctadecane-1,3-diol; 2-N-oleoylaminooctadecane-1,3-diol; 2-N- palmitoylaminooctadecane-1,3-diol; 2-N-stearoylaminooctadecane-1,3-diol; 2-N- behenoylaminooctadecane-1,3-diol; 2-N-[2-hydroxypalmitoyl]aminooctadecane-1,3- diol; 2-N-stearoylaminooctadecane-1,3,4-triol and in particular N- stearoylphytosphingosine, 2-N-palmitoylaminohexadecane-1,3-diol, N- linoleoyldihydrosphingosine, N-oleoyldihydrosphingosine, N- palmitoyldihydrosphingosine, N-stearoyldihydrosphingosine, and N- behenoyldihydrosphingosine, N-docosanoyl-N-methyl-D-glucamine, cetylic acid N- (2-hydroxyethyl)-N-(3-cetyloxy-2-hydroxypropyl)amide and bis(N-hydroxyethyl-N- cetyl)malonamide; and mixtures thereof. Use will preferably be made of N- oleoyldihydrosphingosine. The solid fatty substances are preferably chosen from solid fatty alcohols, in particular from cetyl alcohol, stearyl alcohol and mixtures thereof such as cetylstearyl or cetearyl alcohol. Butters may also be used. For the purposes of the present invention, the term “butter” (also referred to as a “pasty fatty substance”) means a lipophilic fatty compound with a reversible solid/liquid change of state, comprising at a temperature of 25°C and at atmospheric pressure (760 mmHg) a liquid fraction and a solid fraction. Preferably, the butter(s) according to the invention have a melting start temperature above 25°C and a melting end temperature below 60°C. Preferably, the particular butter(s) are of plant origin, such as those described in Ullmann’s Encyclopedia of Industrial Chemistry (“Fats and Fatty Oils”, A. Thomas, published online: JUN 15, 2000, DOI: 10.1002/14356007.a10_173, point 13.2.2.2. Shea Butter, Borneo Tallow, and Related Fats (Vegetable Butters)). Mention may be made more particularly of shea butter, Nilotica shea butter (Butyrospermum parkii), galam butter, (Butyrospermum parkii), Borneo butter or fat or tengkawang tallow (Shorea stenoptera), shorea butter, illipe butter, madhuca or bassia butter (Madhuca longifolia), mowrah butter (Madhuca latifolia), katiau butter (Madhuca mottleyana), phulwara butter (M. butyracea), mango butter (Mangifera indica), murumuru butter (Astrocaryum murumuru), kokum butter (Garcinia indica), ucuuba butter (Virola sebifera), tucuma butter, painya butter (Kpangnan) (Pentadesma butyracea), coffee butter (Coffea arabica), apricot butter (Prunus armeniaca), macadamia butter (Macadamia ternifolia), grapeseed butter (Vitis vinifera), avocado butter (Persea gratissima), olive butter (Olea europaea), sweet almond butter (Prunus amygdalus dulcis), cocoa butter and sunflower butter. An example of a preferred butter is shea butter. In a known manner, shea butter is extracted from the fruit (also called “kernels” or “nuts”) of the Butyrospermum parkii tree. Each fruit contains between 45% and 55% fatty substance, which is extracted and generally refined. According to one preferred embodiment, the composition according to the invention comprises one or more liquid fatty substances, preferably chosen from plant oils, liquid fatty esters of a fatty acid and/or of a fatty alcohol, amino silicones, and mixtures thereof. More preferentially, they are chosen from sunflower oil, corn oil, soybean oil, marrow oil, grapeseed oil, sesame oil, hazelnut oil, apricot oil, macadamia oil, arara oil, castor oil, avocado oil, isopropyl myristate, coco caprylate/caprate, amino silicones such as amodimethicones and bis-amino silicones, and mixtures thereof. According to one preferred embodiment, the solid composition according to the invention comprises one or more liquid fatty substances. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the fatty substance(s) preferably ranges from 0.1% to 30% by weight, preferentially from 0.5% to 20% by weight, more preferentially from 1% to 15% by weight, better still from 2% to 10%, even better still from 3% to 9% by weight, relative to the total weight of the composition. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the liquid fatty substance(s) preferably ranges from 0.1% to 30% by weight, preferentially from 0.5% to 20% by weight, more preferentially from 1 to 15% by weight, better still from 2% to 10%, even better still from 3% to 9%, or even from 3% to 7% by weight, relative to the total weight of the composition. Cationic polymer(s) The solid composition contained in the packaging article according to the present invention can optionally also comprise one or more cationic polymers. For the purposes of the present invention, the term “cationic polymer” means any polymer comprising cationic groups and/or groups that may be ionized to cationic groups. Preferably, the cationic polymer(s) are hydrophilic or amphiphilic. The cationic polymers are preferably not silicone polymers (not comprising any Si-O unit). The preferred cationic polymers are chosen from those that contain units including primary, secondary, tertiary and/or quaternary amine groups that may either form part of the main polymer chain or may be borne by a side substituent directly connected thereto. Preferably, the cationic polymers according to the invention do not comprise any anionic groups or any groups that can be ionized into an anionic group. The cationic polymers that may be used preferably have a weight-average molar mass (Mw) of between 500 and 5×10⁶ approximately and preferably between 10³ and 3×10⁶ approximately. Among the cationic polymers, mention may be made more particularly of: (1) homopolymers or copolymers derived from acrylic or methacrylic esters or amides and including at least one of the units having the following formulae:

in which formulae: - R₃, which may be identical or different, denote a hydrogen atom or a CH₃ radical; - A, which are identical or different, represent a linear or branched divalent alkyl group of 1 to 6 carbon atoms, preferably 2 or 3 carbon atoms, or a hydroxyalkyl group of 1 to 4 carbon atoms; - R₄, R₅ and R₆, which may be identical or different, represent an alkyl group containing from 1 to 18 carbon atoms or a benzyl radical, and preferably an alkyl group containing from 1 to 6 carbon atoms; - R₁ and R₂, which may be identical or different, represent a hydrogen atom or an alkyl group containing from 1 to 6 carbon atoms, preferably methyl or ethyl; and - X denotes an anion derived from an inorganic or organic acid, such as a methosulfate anion or a halide, such as chloride or bromide. The copolymers of family (1) may also contain one or more units derived from comonomers which may be chosen from the family of acrylamides, methacrylamides, diacetone acrylamides, acrylamides and methacrylamides substituted on the nitrogen with lower (C₁-C₄) alkyls, acrylic acids or methacrylic acids or esters thereof, vinyllactams such as vinylpyrrolidone or vinylcaprolactam, and vinyl esters. Among these copolymers of family (1), mention may be made of: - copolymers of acrylamide and of dimethylaminoethyl methacrylate quaternized with dimethyl sulfate or with a dimethyl halide, such as the product sold under the name Hercofloc by Hercules, - copolymers of acrylamide and of methacryloyloxyethyltrimethylammonium chloride, such as the products sold under the name Bina Quat P 100 by Ciba Geigy, - the copolymer of acrylamide and of methacryloyloxyethyltrimethylammonium methosulfate, such as the product sold under the name Reten by Hercules, - quaternized or non-quaternized vinylpyrrolidone/dialkylaminoalkyl acrylate or methacrylate copolymers, such as the products sold under the name Gafquat by ISP, for instance Gafquat 734 or Gafquat 755, or alternatively the products known as Copolymer 845, 958 and 937. These polymers are described in detail in French patents 2077143 and 2393573, - dimethylaminoethyl methacrylate/vinylcaprolactam/vinylpyrrolidone terpolymers, such as the product sold under the name Gaffix VC 713 by ISP, - vinylpyrrolidone/methacrylamidopropyldimethylamine copolymers, such as the products sold under the name Styleze CC 10 by ISP; - quaternized vinylpyrrolidone/dimethylaminopropylmethacrylamide copolymers such as the product sold under the name Gafquat HS 100 by ISP; - polymers, preferably crosslinked polymers, of methacryloyloxy(C₁- C₄)alkyltri(C₁-C₄)alkylammonium salts, such as the polymers obtained by homopolymerization of dimethylaminoethyl methacrylate quaternized with methyl chloride, or by copolymerization of acrylamide with dimethylaminoethyl methacrylate quaternized with methyl chloride, the homo- or copolymerization being followed by crosslinking with an olefinically unsaturated compound, in particular methylenebisacrylamide. A crosslinked acrylamide/methacryloyloxyethyltrimethylammonium chloride copolymer (20/80 by weight) in the form of a dispersion comprising 50% by weight of said copolymer in mineral oil may more particularly be used. This dispersion is sold under the name Salcare^® SC 92 by Ciba. Use may also be made of a crosslinked methacryloyloxyethyltrimethylammonium chloride homopolymer comprising approximately 50% by weight of the homopolymer in mineral oil or in a liquid ester. These dispersions are sold under the names Salcare^® SC 95 and Salcare^® SC 96 by Ciba; (2) cationic polysaccharides, notably cationic inulins, celluloses and galactomannan gums. Among the cationic polysaccharides, mention may be made more particularly of cellulose ether derivatives including quaternary ammonium groups, cationic cellulose copolymers or cellulose derivatives grafted with a water- soluble quaternary ammonium monomer and cationic galactomannan gums. The cellulose ether derivatives including quaternary ammonium groups are notably described in FR 1492597, and mention may be made of the polymers sold under the name Ucare Polymer JR (JR 400 LT, JR 125 and JR 30M) or LR (LR 400 and LR 30M) by Amerchol. These polymers are also defined in the CTFA dictionary as quaternary ammoniums of hydroxyethyl cellulose that have reacted with an epoxide substituted with a trimethylammonium group. Cationic cellulose copolymers or cellulose derivatives grafted with a water- soluble quaternary ammonium monomer are described notably in patent US 4131576, and mention may be made of hydroxyalkyl celluloses, for instance hydroxymethyl, hydroxyethyl or hydroxypropyl celluloses notably grafted with a methacryloylethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dimethyldiallylammonium salt. The commercial products corresponding to this definition are more particularly the products sold under the names Celquat L 200 and Celquat H 100 by National Starch. Among the cationic cellulose derivatives, use may also be made of cationic associative celluloses, which may be chosen from quaternized cellulose derivatives, and in particular quaternized celluloses modified with groups including at least one fatty chain, such as linear or branched alkyl groups, linear or branched arylalkyl groups, or linear or branched alkylaryl groups, preferably linear or branched alkyl groups, these groups including at least 8 carbon atoms, notably from 8 to 30 carbon atoms, better still from 10 to 24, or even from 10 to 14, carbon atoms; or mixtures thereof. Preferably, mention may be made of quaternized hydroxyethylcelluloses modified with groups including at least one fatty chain, such as linear or branched alkyl groups, linear or branched arylalkyl groups, or linear or branched alkylaryl groups, preferably linear or branched alkyl groups, these groups including at least 8 carbon atoms, notably from 8 to 30 carbon atoms, better still from 10 to 24 or even from 10 to 14 carbon atoms; or mixtures thereof. Preferentially, mention may be made of the hydroxyethyl celluloses of formula

in which: - R represents an ammonium group R_aR_bR_cN⁺-, Q- in which R_a, R_b and R_c, which may be identical or different, represent a hydrogen atom or a linear or branched C₁-C₃₀ alkyl, preferably an alkyl, and Q- represents an anionic counterion such as a halide, for instance a chloride or bromide; - R' represents an ammonium group R'_aR'_bR'_cN⁺-, Q'- in which R'_a, R'_b and R'_c, which may be identical or different, represent a hydrogen atom or a linear or branched C₁-C₃₀ alkyl, preferably an alkyl, and Q'- represents an anionic counterion such as a halide, for instance a chloride or bromide; it being understood that at least one of the radicals R_a, R_b, R_c, R'_a, R'_b and R'_c represents a linear or branched C₈-C₃₀ alkyl; - n, x and y, which may be identical or different, represent an integer of between 1 and 10000. Preferably, in formula (VI), at least one of the radicals R_a, R_b, R_c, R'_a, R'_b or R'_c represents a linear or branched C₈ to C₃₀, better still C₁₀ to C₂₄, or even C₁₀ to C₁₄ alkyl; mention may be made in particular of the dodecyl radical (C₁₂). Preferably, the other radical(s) represent a linear or branched C₁-C₄ alkyl, notably methyl. Preferably, in formula (VI), only one of the radicals R_a, R_b, R_c, R'_a, R'_b or R'_c represents a linear or branched C₈ to C₃₀, better still C₁₀ to C₂₄, or even C₁₀ to C₁₄ alkyl; mention may be made in particular of the dodecyl radical (C₁₂). Preferably, the other radicals represent a linear or branched C₁ to C₄ alkyl, notably methyl. Even better still, R may be a group chosen from –N⁺(CH₃)₃, Q'- and –N⁺(C₁₂H₂₅)(CH₃)₂, Q'-, preferably a group –N⁺(CH₃)₃, Q'-. Even better still, R' may be a group –N⁺(C₁₂H₂₅)(CH₃)₂, Q'-. The aryl radicals preferably denote phenyl, benzyl, naphthyl or anthryl groups. Mention may notably be made of the polymers having the following INCI names: - Polyquaternium-24, such as the product Quatrisoft LM 200^®, sold by Amerchol/Dow Chemical; - PG-Hydroxyethylcellulose Cocodimonium Chloride, such as the product Crodacel QM^®; - PG-Hydroxyethylcellulose Lauryldimonium Chloride (C₁₂ alkyl), such as the product Crodacel QL^®; and - PG-Hydroxyethylcellulose Stearyldimonium Chloride (C₁₈ alkyl), such as the product Crodacel QS^®, sold by Croda. Mention may also be made of the hydroxyethylcelluloses of formula (VI) in which R represents a trimethylammonium halide and R' represents a dimethyldodecylammonium halide, preferentially R represents trimethylammonium chloride (CH₃)₃N⁺-, Cl- and R' represents dimethyldodecylammonium chloride (CH₃)₂(C₁₂H₂₅)N⁺-, Cl-. This type of polymer is known under the INCI name Polyquaternium-67; as commercial products, mention may be made of the Softcat Polymer SL^® polymers, such as SL-100, SL-60, SL-30 and SL-5, from Amerchol/Dow Chemical. More particularly, the polymers of formula (VI) are, for example, those of which the viscosity is between 2 and 3 Pa.s inclusive (between 2000 and 3000 cPs), preferentially between 2.7 and 2.8 Pa.s (between 2700 and 2800 cPs). Typically, Softcat Polymer SL-5 has a viscosity of 2.5 Pa.s (2500 Pa.s), Softcat Polymer SL-30 has a viscosity of 2700 cPs, Softcat Polymer SL-60 has a viscosity of 2.7 Pa.s (2700 cPs) and Softcat Polymer SL-100 has a viscosity of 2.8 Pa.s (2800 cPs). Use may also be made of Softcat Polymer SX-1300X with a viscosity of between 1 and 2 Pa.s (between 1000 and 2000 cPs). The cationic galactomannan gums are described more particularly in US patents 3589578 and 4031307, and mention may be made of guar gums comprising cationic trialkylammonium groups. Use is made, for example, of guar gums modified with a 2,3-epoxypropyltrimethylammonium salt (for example, a chloride). Such products are notably sold under the names Jaguar C13 S, Jaguar C 15, Jaguar C 17 and Jaguar C162 by Rhodia; (3) polymers formed from piperazinyl units and divalent alkylene or hydroxyalkylene radicals containing linear or branched chains, optionally interrupted with oxygen, sulfur or nitrogen atoms or with aromatic or heterocyclic rings, and also the oxidation and/or quaternization products of these polymers; (4) water-soluble polyaminoamides prepared in particular by polycondensation of an acidic compound with a polyamine; these polyaminoamides can be crosslinked with an epihalohydrin, a diepoxide, a dianhydride, an unsaturated dianhydride, a bis-unsaturated derivative, a bis-halohydrin, a bis-azetidinium, a bis- haloacyldiamine, a bis-alkyl halide or alternatively with an oligomer resulting from the reaction of a difunctional compound which is reactive with a bis-halohydrin, a bis- azetidinium, a bis-haloacyldiamine, a bis-alkyl halide, an epihalohydrin, a diepoxide or a bis-unsaturated derivative; the crosslinking agent being used in proportions ranging from 0.025 to 0.35 mol per amine group of the polyamino amide; these polyaminoamides can be alkylated or, if they include one or more tertiary amine functions, they can be quaternized; (5) polyaminoamide derivatives resulting from the condensation of polyalkylene polyamines with polycarboxylic acids followed by alkylation with difunctional agents. Mention may be made, for example, of adipic acid/dialkylaminohydroxyalkyldialkylenetriamine polymers in which the alkyl radical includes from 1 to 4 carbon atoms and preferably denotes methyl, ethyl or propyl. Among these derivatives, mention may be made more particularly of the adipic acid/dimethylaminohydroxypropyl/diethylenetriamine polymers sold under the name Cartaretine F, F4 or F8 by Sandoz. (6) polymers obtained by reacting a polyalkylene polyamine including two primary amine groups and at least one secondary amine group with a dicarboxylic acid chosen from diglycolic acid and saturated aliphatic dicarboxylic acids containing from 3 to 8 carbon atoms; the mole ratio between the polyalkylene polyamine and the dicarboxylic acid preferably being between 0.8:1 and 1.4:1; the resulting polyaminoamide being reacted with epichlorohydrin in a mole ratio of epichlorohydrin relative to the secondary amine group of the polyaminoamide preferably of between 0.5:1 and 1.8:1. Polymers of this type are sold in particular under the name Hercosett 57 by Hercules Inc. or under the name PD 170 or Delsette 101 by Hercules in the case of the adipic acid/epoxy-propyl/diethylenetriamine copolymer. (7) cyclopolymers of alkyldiallylamine or of dialkyldiallylammonium, such as homopolymers or copolymers including, as main constituent of the chain, units corresponding to formula (VII) or (VIII):

in which formulae (VII) and (VIII): - k and t are equal to 0 or 1, the sum k + t being equal to 1; - R₁₂ denotes a hydrogen atom or a methyl radical; - R₁₀ and R₁₁, independently of one another, denote an alkyl group containing from 1 to 6 carbon atoms, a hydroxyalkyl group in which the alkyl group contains 1 to 5 carbon atoms, a C₁ to C₄ amidoalkyl group; or alternatively R₁₀ and R₁₁ may denote, together with the nitrogen atom to which they are attached, heterocyclic groups such as piperidinyl or morpholinyl; R₁₀ and R₁₁, independently of one another, preferably denote an alkyl group containing from 1 to 4 carbon atoms; and - Y- is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulfate, bisulfite, sulfate or phosphate. Mention may be made more particularly of the dimethyldiallylammonium salt (for example chloride) homopolymer sold, for example, under the name Merquat 100 by Nalco (and homologues thereof of low weight-average molar masses) and the copolymers of diallyldimethylammonium salts (for example chloride) and of acrylamide, notably sold under the names Merquat 550 and Merquat 7SPR; (8) quaternary diammonium polymers comprising repeating units of formula (IX):

in which formula (IX): - R₁₃, R₁₄, R₁₅ and R₁₆, which may be identical or different, represent aliphatic, alicyclic or arylaliphatic radicals containing from 1 to 20 carbon atoms or lower hydroxyalkylaliphatic radicals, or alternatively R₁₃, R₁₄, R₁₅ and R₁₆, together or separately, constitute, with the nitrogen atoms to which they are attached, heterocycles optionally comprising a second non-nitrogen heteroatom, or alternatively R₁₃, R₁₄, R₁₅ and R₁₆ represent a linear or branched C₁ to C₆ alkyl radical substituted with a nitrile, ester, acyl or amide group or a group -CO-O-R₁₇-D or -CO-NH-R₁₇-D where R₁₇ is an alkylene and D is a quaternary ammonium group; - A₁ and B₁ represent divalent polymethylene groups comprising from 2 to 20 carbon atoms which may be linear or branched, and saturated or unsaturated, and which may contain, linked to or inserted in the main chain, one or more aromatic rings, or one or more oxygen or sulfur atoms or sulfoxide, sulfone, disulfide, amino, alkylamino, hydroxyl, quaternary ammonium, ureido, amide or ester groups; and - X- denotes an anion derived from a mineral or organic acid; it being understood that A₁, R₁₃ and R₁₅ can form, with the two nitrogen atoms to which they are attached, a piperazine ring; in addition, if A₁ denotes a linear or branched, saturated or unsaturated alkylene or hydroxyalkylene radical, B₁ can also denote a group (CH₂)_nCO-D-OC- (CH₂)_n- in which D denotes: a) a glycol residue of formula -O-Z-O-, in which Z denotes a linear or branched hydrocarbon-based radical or a group corresponding to one of the following formulae: -(CH₂-CH₂-O)_x-CH₂-CH₂- and -[CH₂CH(CH₃)-O]_y-CH₂-CH(CH₃)-, where x and y denote an integer from 1 to 4, representing a defined and unique degree of polymerization or any number from 1 to 4 representing an average degree of polymerization; b) a bis-secondary diamine residue, such as a piperazine derivative; c) a bis-primary diamine residue of formula: -NH-Y-NH-, where Y denotes a linear or branched hydrocarbon-based radical, or alternatively the divalent radical - CH₂-CH₂-S-S-CH₂-CH₂-; or d) a ureylene group of formula: -NH-CO-NH-. Preferably, X- is an anion, such as chloride or bromide. These polymers have a number-average molar mass (Mn) generally of between 1000 and 100000. Mention may be made more particularly of polymers which are constituted of repeating units corresponding to formula (X):

in which formula (X) R₁, R₂, R₃ and R₄, which may be identical or different, denote an alkyl or hydroxyalkyl radical containing from 1 to 4 carbon atoms approximately, n and p are integers ranging from 2 to 20 approximately, and X- is an anion derived from a mineral or organic acid. A compound of formula (X) that is particularly preferred is the one for which R₁, R₂, R₃ and R₄ represent a methyl radical and n = 3, p = 6 and X = Cl, which is known as Hexadimethrine chloride according to the INCI (CTFA) nomenclature; (9) polyquaternary ammonium polymers comprising units of formula (XI):

in which formula (XI): - R₁₈, R₁₉, R₂₀ and R₂₁, which may be identical or different, represent a hydrogen atom or a methyl, ethyl, propyl, β-hydroxyethyl, β-hydroxypropyl or - CH₂CH₂(OCH₂CH₂)_pOH radical, where p is equal to 0 or to an integer of between 1 and 6, with the proviso that R₁₈, R₁₉, R₂₀ and R₂₁ do not simultaneously represent a hydrogen atom, - r and s, which are identical or different, are integers of between 1 and 6, - q is equal to 0 or to an integer between 1 and 34, - X- denotes an anion, such as a halide, and - A denotes a dihalide radical or preferably represents -CH₂-CH₂-O-CH₂- CH₂-. Examples that may be mentioned include the products Mirapol^® A 15, Mirapol^® AD1, Mirapol^® AZ1 and Mirapol^® 175 sold by Miranol; (10) quaternary polymers of vinylpyrrolidone and of vinylimidazole, for instance the products sold under the names Luviquat^® FC 905, FC 550 and FC 370 by BASF; (11) polyamines such as Polyquart^® H sold by Cognis, which is referenced under the name Polyethylene Glycol (15) Tallow Polyamine in the CTFA dictionary. (12) polymers including in their structure: (a) one or more units to formula (A) below:

(b) optionally one or more units corresponding to formula (B) below:

In other words, these polymers may be notably chosen from homopolymers or copolymers including one or more units derived from vinylamine and optionally one or more units derived from vinylformamide. Preferably, these cationic polymers are chosen from polymers including, in their structure, from 5 mol% to 100 mol% of units corresponding to formula (A) and from 0 to 95 mol% of units corresponding to formula (B), preferentially from 10 mol% to 100 mol% of units corresponding to formula (A) and from 0 to 90 mol% of units corresponding to formula (B). These polymers may be obtained, for example, by partial hydrolysis of polyvinylformamide. This hydrolysis may take place in acidic or basic medium. The weight-average molecular mass of said polymer, measured by light scattering, may range from 1000 to 3000000 g/mol, preferably from 10000 to 1000000 and more particularly from 100000 to 500000 g/mol. The cationic charge density of these polymers may range from 2 meq/g to 20 meq/g, preferably from 2.5 to 15 meq/g and more particularly from 3.5 to 10 meq/g. The polymers including units of formula (A) and optionally units of formula (B) are notably sold under the name Lupamin by BASF, for instance, in a non-limiting manner, the products sold under the names Lupamin 9095, Lupamin 5095, Lupamin 1095, Lupamin 9030 (or Luviquat 9030) and Lupamin 9010. Preferably, the solid composition according to the invention comprises one or more cationic polymers. More preferentially, the solid composition according to the invention comprises one or more cationic polymers chosen from cationic polysaccharides (family (2)) and mixtures thereof, more preferentially from cationic galactomannan gums and mixtures thereof, and even better still from cationic guar gums and mixtures thereof. More preferentially, the solid composition according to the invention comprises one or more cationic polymers chosen from cationic polysaccharides (family (2)), alkyldiallylamine or dialkyldiallylammonium cyclopolymers (family (7)) and mixtures thereof, even more preferentially from mixtures of cationic galactomannan gums and of alkyldiallylamine or dialkyldiallylammonium cyclopolymers, even better still from mixtures of cationic guar gums and copolymers of diallyldimethylammonium and acrylamide salts (for example chloride). When they are present in the solid composition contained in the packaging article according to the invention, the total content of the cationic polymer(s) is preferably greater than or equal to 0.05% by weight, more preferentially ranges from 0.05% to 5% by weight, even better still ranges from 0.1% to 2% by weight and even more preferentially ranges from 0.2% to 1.5% by weight, relative to the total weight of the composition. According to one preferred embodiment, the cationic polymer(s) are chosen from cationic polysaccharides (family (2)) and mixtures thereof, and the total content of the cationic polysaccharide(s) present in the solid composition according to the invention is preferably greater than or equal to 0.05% by weight, more preferentially ranges from 0.05% to 5% by weight, and even better still from 0.1% to 2% by weight, or even from 0.2% to 1.5% by weight, relative to the total weight of the composition. Amphoteric or zwitterionic surfactant(s) The solid composition contained in the packaging article according to the present invention can optionally also comprise one or more amphoteric or zwitterionic surfactants. In particular, the amphoteric or zwitterionic surfactant(s), which are preferably non-silicone, used in the solid composition according to the present invention may notably be derivatives of optionally quaternized secondary or tertiary aliphatic amines, in which derivatives the aliphatic group is a linear or branched chain including from 8 to 22 carbon atoms, said amine derivatives containing at least one anionic group, for instance a carboxylate, sulfonate, sulfate, phosphate or phosphonate group. Mention may in particular be made of (C₈-C₂₀)alkylbetaines, (C₈- C₂₀)alkylsulfobetaines, (C₈-C₂₀)alkylamido(C₁-C₆)alkylbetaines and (C₈- C₂₀)alkylamido(C₁-C₆)alkylsulfobetaines, and mixtures thereof. Among the optionally quaternized derivatives of secondary or tertiary aliphatic amines that may be used, as defined above, mention may also be made of the compounds having the respective structures (III) and (IV) below: R_a-CONHCH₂CH₂-N⁺(R_b)(R_c)-CH₂COO-, M⁺, X- (III) in which formula (III): - R_a represents a C₁₀ to C₃₀ alkyl or alkenyl group derived from an acid R_aCOOH which is preferably present in hydrolyzed coconut kernel oil; preferably, R_a represents a heptyl, nonyl or undecyl group; - R_b represents a β-hydroxyethyl group; - R_c represents a carboxymethyl group; - M⁺ represents a cationic counterion derived from an alkali metal or alkaline- earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; and - X- represents an organic or inorganic anionic counterion, such as that chosen from halides, acetates, phosphates, nitrates, (C₁-C₄)alkyl sulfates, (C₁-C₄)alkyl- or (C₁-C₄)alkylaryl- sulfonates, in particular methyl sulfate and ethyl sulfate; or alternatively M⁺ and X- are absent; R_a’-CONHCH₂CH₂-N(B)(B’) (IV) in which formula (IV): - B represents the group -CH₂CH₂OX’; - B’ represents the group -(CH₂)_zY’, with z = 1 or 2; - X’ represents the group -CH₂COOH, -CH₂-COOZ’, -CH₂CH₂COOH or CH₂CH₂-COOZ’, or a hydrogen atom; - Y’ represents the group -COOH, -COOZ’ or -CH₂CH(OH)SO₃H or the group CH₂CH(OH)SO₃-Z’; - Z’ represents a cationic counterion derived from an alkali metal or alkaline- earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; - R_a’ represents a C₁₀ to C₃₀ alkyl or alkenyl group of an acid R_a’-COOH which is preferably present in coconut kernel oil or in hydrolyzed linseed oil; preferably, R_a’ is an alkyl group, particularly a C₁₇ group, and its iso form, or an unsaturated C₁₇ group. These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names disodium cocoamphodiacetate, disodium lauroamphodiacetate, disodium caprylamphodiacetate, disodium capryloamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium caprylamphodipropionate, disodium capryloamphodipropionate, lauroamphodipropionic acid and cocoamphodipropionic acid. By way of example, mention may be made of the cocoamphodiacetate sold by Rhodia under the trade name Miranol^® C2M Concentrate. Use may also be made of compounds of formula (V): R_a’’-NHCH(Y’’)-(CH₂)_nCONH(CH₂)_n’-N(R_d)(R_e) (V) in which formula (V): - Y’’ represents the group -COOH, -COOZ’’ or -CH₂CH(OH)SO₃H or the group CH₂CH(OH)SO₃-Z’’; - R_d and R_e, independently of each other, represent a C₁ to C₄ alkyl or hydroxyalkyl radical; - Z’’ represents a cationic counterion derived from an alkali metal or alkaline- earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; - R_a’’ represents a C₁₀ to C₃₀ alkyl or alkenyl group of an acid R_a’’-COOH which is preferably present in coconut kernel oil or in hydrolyzed linseed oil; and - n and n’ denote, independently of each other, an integer ranging from 1 to 3. Among the compounds of formula (V), mention may be made of the compound classified in the CTFA dictionary under the name sodium diethylaminopropyl cocoaspartamide and sold by Chimex under the name Chimexane HB. These compounds may be used alone or as mixtures. Among the amphoteric or zwitterionic surfactants mentioned above, use is advantageously made of (C₈-C₂₀)alkylbetaines, such as cocoyl betaine, (C₈- C₂₀)alkylamido(C₃-C₈)alkylbetaines, such as cocamidopropylbetaine, (C₈- C₂₀)alkylamphoacetates, (C₈-C₂₀)alkylamphodiacetates and mixtures thereof; and preferably (C₈-C₂₀)alkylbetaines, (C₈-C₂₀)alkylamido(C₃-C₈)alkylbetaines and mixtures thereof. Preferentially, the amphoteric or zwitterionic surfactant(s) are chosen from (C₈-C₂₀)alkylbetaines, (C₈-C₂₀)alkylamido(C₃-C₈)alkylbetaines and mixtures thereof, even better still from (C₈-C₂₀)alkylamido(C₃-C₈)alkylbetaines and mixtures thereof. Preferably, the solid composition according to the invention comprises one or more amphoteric or zwitterionic surfactants. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the amphoteric or zwitterionic surfactant(s) preferably ranges from 0.01% to 10% by weight, more preferentially from 0.05% to 5% weight, and even better still from 0.1% to 1% by weight, relative to the total weight of the composition. Polyol(s) The solid composition contained in the packaging article according to the present invention may optionally also comprise one or more polyols. The polyol(s) present in the solid composition of the invention are preferably chosen from the polyols of formula (XII) below:

(XII) in which formula (XII): - R’₁, R’₂, R’₃ and R’₄, which may be identical or different, denote, independently of one another, a hydrogen atom, a linear or branched C₁ to C₆ alkyl radical or a C₁ to C₆ mono- or polyhydroxyalkyl radical, - A denotes a saturated or unsaturated, linear or branched alkyl radical containing from 1 to 18 carbon atoms, this radical comprising from 0 to 9 oxygen atoms but no hydroxyl group, and - m denotes 0 or 1. The polyol(s) are preferably chosen from the polyols of formula (XII) in which m has the value 0, and mixtures thereof, and more preferentially from propylene glycol (propane-1,2-diol), 1,2,3-propanetriol, pinacol (2,3-dimethyl- 2,3-butanediol), 1,2,3-butanetriol, 2,3-butanediol, glycerol, sorbitol and mixtures thereof. The polyol(s) may also be chosen from the polyols of formula (XII), in which m is 1 and R'₁, R'₂, R'₃ and R'₄, which may be identical or different, are, independently of one another, a hydrogen atom or a C₁ to C₆ alkyl radical, and mixtures thereof. According to this embodiment, the polyol(s) are advantageously chosen from polyethylene glycols and mixtures thereof, and more particularly the product called PEG-6 or PEG-8 in the CTFA publication (International Cosmetic Ingredient Dictionary, Seventh Edition). The polyol(s) can also be chosen from the polyols of formula (XII), in which m is 1 and R'₁, R'₂, R'₃ and R'₄, which may be identical or different, denote, independently of one another, a hydrogen atom or a C₁ to C₆ alkyl radical, and the molecular weight of which is less than 200, and mixtures thereof. According to this specific embodiment, the polyol(s) are preferably chosen from 3-methyl-1,3,5- pentanetriol, 1,2,4-butanetriol, 1,5-pentanediol, 2-methyl-1,3-propanediol, 1,3- butanediol, 3-methyl-1,5-pentanediol, neopentyl glycol (2,2-dimethyl-1,3- propanediol), isoprene glycol (3-methyl-1,3-butanediol), hexylene glycol (2-methyl- 2,4-pentanediol), and mixtures thereof, and more preferentially from hexylene glycol, neopentyl glycol, 3-methyl-1,5-pentanediol and and mixtures thereof. Preferably, the molecular weight (MW) of said polyol(s) present in the solid composition of the invention is between 50 and 350, more preferentially between 60 and 200 and better still between 70 and 150. Preferably, the polyol(s) are chosen from diols, glycerol and mixtures thereof, more preferentially from the compounds of formula (XII) in which R'₁, R'₂, R'₃ and R'₄, which may be identical or different, denote, independently of one another, a hydrogen atom or a C₁ to C₆ alkyl radical, glycerol and mixtures thereof. Advantageously, the polyol(s) are chosen from glycerol, propylene glycol (propane-1,2-diol), pinacol (2,3-dimethyl-2,3-butanediol), 2,3-butanediol, polyethylene glycols, 1,5-pentanediol, 2-methyl-1,3-propanediol, 1,3-butanediol, 3- methyl-1,5-pentanediol, neopentyl glycol (2,2-dimethyl-1,3-propanediol), isoprene glycol (3-methyl-1,3-butanediol), hexylene glycol (2-methyl-2,4-pentanediol), dipropylene glycol, and mixtures thereof. Preferably, the polyol or polyols are chosen from glycerol, propylene glycol or dipropylene glycol, and mixtures thereof. Preferably, the solid composition according to the invention comprises one or more polyols. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the polyol(s) preferably ranges from 0.1% to 15% by weight, preferentially from 0.5% to 10% weight, and even better still from 1% to 5% by weight, relative to the total weight of the composition. Carboxylic acid(s) The solid composition contained in the packaging article according to the present invention may optionally also comprise one or more C₁-C₆ carboxylic acids. The C₁-C₆ carboxylic acid(s) preferably correspond to formula (Xa) below:

in which: A is a monovalent group when n is 0, or a polyvalent group when n is greater than or equal to 1; A represents a saturated or unsaturated, cyclic or non-cyclic, aromatic or non-aromatic hydrocarbon-based group comprising from 1 to 6 carbon atoms, optionally interrupted with one or more heteroatoms, and/or substituted with one or more hydroxyl and/or amino groups; preferably, A represents a monovalent C₁- C₆ alkyl or phenyl group, or a polyvalent C₁-C₆ alkylene or phenylene group optionally substituted with one or more hydroxyl groups; - n represents an integer ranging from 0 to 10, preferably from 0 to 5, and better still from 0 to 2. More particularly, the carboxylic acid(s) of formula (Xa) are chosen from α- hydroxy acids, in which A represents or a phenyl group, or a C₁-C₆, in particular a C₂- C₄, alkylene group, substituted with one or more hydroxyl groups; preferably with an OH group; and n ranges from 0 to 2. More particularly, the C₁-C₆ carboxylic acid(s) is or are chosen from those of formula (Xa) in which: n=0 and A represents a C₁-C₆, in particular C₂-C₄, alkyl group or a C₁-C₆, in particular C₂-C₄, alkyl group substituted with an OH group; or n=0 and A represents a phenyl group, or a phenyl group substituted with an OH group; or n=1 or 2 and A represents a divalent or trivalent C₁-C₆, in particular C₂-C₄, alkyl group or a divalent or trivalent C₁-C₆, in particular C₂-C₄, alkyl group substituted with an OH group. Even more preferably, the C₁-C₆ carboxylic acid(s) is or are chosen from salicylic acid, citric acid, glutaric acid and lactic acid, and better still it is citric acid. Preferably, the solid composition according to the invention comprises one or more C₁-C₆ carboxylic acids. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the C₁-C₆ carboxylic acid(s) is preferably greater than or equal to 10% by weight, more preferentially ranges from 10% to 30% by weight, better still from 11% to 25% by weight and even better still from 12% to 20% by weight, relative to the total weight of the composition. Anti-caking agent(s) The solid composition contained in the packaging article according to the present invention can optionally also comprise one or more anti-caking agents. For the purposes of the present invention, the term "anti-caking agent" is understood to mean a lubricant acting as an anti-caking agent. The lubricant(s) which can be used are different from the cationic polymers defined above. Among the lubricants which can be used in the solid composition of the invention, mention may in particular be made of silica, in particular anhydrous colloidal silica, sericite, polyamide (Nylon®) powders, poly-p-alanine powders and polyethylene powders, tetrafluoroethylene (Teflon^®) polymer powders, acrylate and dimethicone copolymers, stearic acid, metal soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, such as, for example, zinc stearate, magnesium stearate or lithium stearate, zinc laurate and magnesium myristate, alkali metal or alkaline-earth metal carbonates, such as for example magnesium, sodium and calcium carbonates, fatty acids such as stearic acid, celluloses, in particular crystalline celluloses, and mixtures thereof. According to one embodiment, the anti-caking agent(s) are advantageously chosen from metal soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, and mixtures thereof, even better still from zinc stearate, magnesium stearate, lithium stearate, zinc laurate, magnesium myristate and mixtures thereof. More preferentially, the lubricant is magnesium stearate. According to another embodiment, the anti-caking agent(s) are advantageously chosen from alkali metal or alkaline-earth metal carbonates and mixtures thereof, preferably from magnesium carbonate, sodium carbonate, calcium carbonate and mixtures thereof; and more preferentially magnesium carbonate. Preferably, the solid composition according to the invention comprises one or more anti-caking agents. When they are present in the solid composition contained in the packaging article according to the invention, the total content of the anti-caking agent(s) preferably ranges from 0.1% to 25% by weight, preferentially from 1% to 15% weight, and even better still from 5% to 10% by weight, relative to the total weight of the composition. The solid composition contained in the packaging article according to the present invention may optionally also comprise water. Preferably, the water content is less than or equal to 20% by weight, preferentially less than or equal to 15%, better still less than or equal to 10% by weight relative to the total weight of the composition. Preferably, the water content ranges from 0.1% to 20% by weight, more preferentially from 1% to 15% by weight and better still from 2% to 10% by weight relative to the total weight of the composition. The solid composition according to the invention may also comprise sodium chloride. Its content may range from 0.01% to 5% by weight, more preferentially from 0.1% to 3% by weight, and better still from 0.2% to 2% by weight, relative to the total weight of the composition. Additives The solid composition according to the present invention may also optionally comprise one or more additives, other than the compounds of the invention and among which mention may be made of anionic, non-ionic or amphoteric polymers or mixtures thereof, anionic and non-ionic surfactants, antidandruff agents, anti-seborrhoea agents, protein hydrolysates, vitamins and provitamins including panthenol, sunscreens, sequestrants, plasticizers, solubilizers, acidifying agents, alkaline agents, mineral or organic thickeners, notably polymeric thickeners, antioxidants, hydroxy acids and preserving agents. Of course, those skilled in the art will take care to choose this or these optional additional compounds such that the advantageous properties intrinsically attached to the composition according to the invention are not, or not substantially, adversely affected by the envisaged addition(s). The above additives may generally be present in an amount, for each of them, of between 0 and 20% by weight, relative to the total weight of the composition. Advantageously, the envelope represents from 0.5% to 20% by weight, preferably from 1% to 15% by weight, more preferentially from 2% to 10% by weight, better still from 4% to 10% by weight, and even better still from 4% to 8% by weight, relative to the total weight of the packaging article. Advantageously, the solid composition as defined hereinbelow represents from 80% to 99.5% by weight, preferably from 85% to 99% by weight, more preferentially still from 90 to 98% by weight, better still from 90% to 96% by weight and even better still from 92% to 96% by weight, relative to the total weight of the packaging article. The weight ratio between the total weight of the solid composition of the invention and the total weight of the envelope advantageously ranges from 80/20 to 99/1, preferably from 85/15 to 98/2 and more preferentially from 90/10 to 97/3. Advantageously, the packaging article comprises from 1 to 8 g, preferably from 2 to 6 g, of solid composition; and from 0.1 to 1 g, preferably from 0.2 to 0.7 g, of envelope. The solid composition contained in the packaging article according to the invention may be a care composition, in particular a hair care composition, such as a conditioner. In a first embodiment, the solid composition contained in the packaging article according to the invention comprises: - one or more starch phosphates, as defined above, - one or more additional starches, different from the starch phosphates, as defined above, - optionally, one or more compounds chosen from cationic surfactants, fatty substances, polyols and mixtures thereof. In another embodiment, the solid composition contained in the packaging article according to the invention comprises: - one or more starch phosphates, as defined above, - one or more C₁-C₆ carboxylic acids, -optionally, one or more compounds chosen from cationic polymers, amphoteric surfactants, polyols and mixtures thereof. A subject of the present invention is also a process for cosmetic treatment of keratin materials, notably keratin fibres, in particular human keratin fibres such as the hair, comprising a step of using a packaging article as defined hereinabove. This cosmetic treatment process may in particular be a process for caring for keratin materials, notably keratin fibres, in particular the hair. Preferably, said cosmetic treatment process comprises the following steps: i) mixing the packaging article in a composition that is capable of dissolving, totally or partially, the envelope of said packaging article, ii) applying the composition obtained in step i) to the keratin materials, notably keratin fibres, iii) optionally leaving on said composition, iv) rinsing said keratin materials, notably keratin fibres, and v) optionally drying said keratin materials, notably keratin fibres. Preferably, the composition capable of solubilizing the envelope is water or an aqueous composition. Thus, the aqueous composition may simply be water. The aqueous composition may optionally comprise at least one polar solvent. Among the polar solvents that may be used in this composition, mention may be made of organic compounds that are liquid at ambient temperature (25°C) and at least partially water- miscible. Examples that may be mentioned more particularly include alkanols such as ethyl alcohol, isopropyl alcohol, aromatic alcohols such as benzyl alcohol and phenylethyl alcohol, or polyols or polyol ethers, for instance ethylene glycol monomethyl, monoethyl or monobutyl ether, propylene glycol or ethers thereof, for instance propylene glycol monomethyl ether, butylene glycol, dipropylene glycol, and also diethylene glycol alkyl ethers, for instance diethylene glycol monoethyl ether or monobutyl ether. More particularly, if one or more solvents are present, their respective content in the aqueous composition ranges from 0.5% to 20% by weight and preferably from 2% to 10% by weight relative to the weight of said aqueous composition. The dilution ratio (expressed by weight) between one or more packaging articles, as defined above, and the composition that is suitable for dissolving the packaging article(s) is preferably between 10/90 and 90/10 and more preferentially between 10/90 and 50/50. Better still, this dilution ratio is 20/80. In particular, the composition obtained on conclusion of the mixing (step i) of the process) may be applied to wet or dry keratin fibres. It is advantageously left in place on the keratin fibres for a time ranging from 1 to 15 minutes, preferably from 2 to 10 minutes. The keratin fibres are then rinsed with water. They may optionally be washed with a shampoo, followed by rinsing with water, before being dried or left to dry. Finally, a subject of the present invention is the use of a packaging article as defined hereinabove for washing and/or conditioning keratin materials, notably keratin fibres, in particular human keratin fibres such as the hair. The examples that follow serve to illustrate the invention without, however, being limiting in nature. Example Packaging article envelope An envelope composed of two layers A and B forming a unit film according to the present invention is prepared. The layer A comprises wood pulp and carboxymethylcellulose. The layer B comprises polyvinyl alcohol (PVOH) polymers. The characteristics of the layers and of the film are shown in the table below: [Table 1]

*determined according to the procedure described in "Standard Test Method for Solubility of MonoSol® Water Soluble Film when contained within a Plastic Holder" (MSTM-205) Conditioner composition The compositions C (according to the invention) and C’ (comparative) were prepared from the ingredients, the contents of which are indicated, unless indicated otherwise, as percentages by weight of active material relative to the total weight of the composition, in the table below: [Table 2]

The powdered ingredients (corn starch, starch phosphate, citric acid, guar) were mixed with stirring in a container. The liquid ingredients (except fragrance) are heated to 40°C. These ingredients are added as binder to the container by spraying and are mixed. Finally, the fragrance is added by spraying and mixing is performed. The whole mixture is then dried in an oven at 45°C for 20 hours. After cooling to ambient temperature, the mixture is milled using a mill to obtain a powder. Compositions C and C′ in powder form were each packaged in an envelope composed of two layers (1) and (2) forming a unit film, in a proportion of 0.35 g of powder and 0.02 g (94% of powder + 6% of paper). The layer (1) comprises wood pulp and carboxymethylcellulose. The layer (2) comprises a vinyl alcohol (PVA) polymer. In the presence of water, the packaging article comprising the composition C according to the invention (i.e. comprising a starch phosphate) disintegrates more easily than the packaging article comprising the comparative composition C′ (i.e. not comprising any starch phosphate). No lumps were observed on the hair with the packaging article comprising the composition C, unlike the packaging article comprising the comparative composition C’.

Claims

CLAIMS 1. Packaging article comprising: - an envelope defining at least one cavity, the envelope being composed of at least two layers assembled together in order to form just one unit film, the first layer comprising at least 60% by weight, relative to the total weight of the first layer, of one or more compounds chosen from cellulose-based polymers, plant fibres and mixtures thereof, and the second layer comprising at least 75% by weight, relative to the total weight of the second layer, of one or more vinyl alcohol polymers, - a solid composition comprising one or more starch phosphates, it being understood that said solid composition is in at least one of the cavities defined by the envelope. 2. Packaging article according to Claim 1, characterized in that the compound(s) chosen from cellulose-based polymers, plant fibres and mixtures thereof are chosen from wood pulp, carboxymethylcelluloses, and also the sodium salts thereof, and mixtures thereof. 3. Packaging article according to either one of the preceding claims, characterized in that the compounds chosen from cellulose-based polymers, plant fibres and mixtures thereof are present in the first layer in a content of greater than or equal to 70% by weight, preferably greater than or equal to 75% by weight, more preferentially greater than or equal to 80% by weight, even more preferentially still greater than or equal to 90% by weight and better still greater than or equal to 95% by weight, relative to the total weight of the first layer. 4. Packaging article according to any one of the preceding claims, characterized in that the vinyl alcohol polymer(s) result from the total or partial hydrolysis of vinyl acetate polymers. 5. Packaging article according to the preceding claim, characterized in that the degree of hydrolysis of the vinyl acetate polymers is greater than or equal to 75%, preferably greater than or equal to 80%. 6. Packaging article according to any one of the preceding claims, characterized in that the vinyl alcohol polymer(s) are present in the second layer in a content of greater than or equal to 80% by weight, preferably greater than or equal to 85% by weight, more preferentially greater than or equal to 90% by weight, even more preferentially greater than or equal to 95% by weight, relative to the total weight of the second layer. 7. Packaging article according to any one of the preceding claims, characterized in that the first layer and/or the second layer additionally comprise one or more plasticizers, notably chosen from polyols. 8. Packaging article according to any one of the preceding claims, characterized in that the first layer and/or the second layer additionally comprise one or more fillers. 9. Packaging article according to any one of the preceding claims, characterized in that the ratio between the weight of the first layer and the weight of the second layer ranges from 25/75 to 75/25, preferably from 30/70 to 70/30, more preferentially from 35/65 to 65/35, even more preferentially from 45/55 to 55/45. 10. Packaging article according to any one of the preceding claims, characterized in that the second layer is adhesive. 11. Packaging article according to any one of the preceding claims, characterized in that the starch phosphate(s) are chosen from distarch phosphates. 12. Packaging article according to any one of the preceding claims, characterized in that the total content of the starch phosphate(s) ranges from 0.1% to 30% by weight, preferably from 0.5% to 20% by weight, preferentially from 2% to 15% by weight, relative to the total weight of the composition. 13. Packaging article according to any one of the preceding claims, characterized in that the solid composition also comprises one or more additional starches, preferably chosen from unmodified starches, preferentially from corn starch, potato starch, rice starch and mixtures thereof. 14. Packaging article according to any one of the preceding claims, characterized in that the solid composition also comprises one or more cationic surfactants, preferably chosen from: ^ quaternary ammonium salts of formula (Ia):

in which: the groups R₈ to R₁₁, which may be identical or different, represent a linear or branched aliphatic group including from 1 to 30 carbon atoms, or an aromatic group such as aryl or alkylaryl, at least one of the groups R₈ to R₁₁ including from 8 to 30 and preferably from 12 to 24 carbon atoms, it being possible for the aliphatic groups to include heteroatoms notably such as oxygen, nitrogen, sulfur and halogens; and X- is an anion; ^quaternary ammonium salts of imidazoline of formula (IIa):

in which: R₁₂ represents an alkenyl or alkyl group comprising from 8 to 30 carbon atoms, R₁₃ represents a hydrogen atom, a C₁-C₄ alkyl group or an alkenyl or alkyl group comprising from 8 to 30 carbon atoms, R₁₄ represents a C₁-C₄ alkyl group, R₁₅ represents a hydrogen atom or a C₁-C₄ alkyl group, X- is an anion; ^ quaternary di- or triammonium salts of formula (IIIa):

in which: - R₁₆ denotes an alkyl group including from 16 to 30 carbon atoms, which is optionally hydroxylated and/or optionally interrupted with one or more oxygen atoms, - R₁₇ denotes hydrogen, an alkyl group including from 1 to 4 carbon atoms or a group -(CH₂)₃-N⁺(R_16a)(R_17a)(R_18a); R_16a, R_17a and R_18a, which may be identical or different, denoting hydrogen or an alkyl group including from 1 to 4 carbon atoms, - R₁₈, R₁₉, R₂₀ and R₂₁, which may be identical or different, denote hydrogen or an alkyl group including from 1 to 4 carbon atoms, and - X- is an anion; ^ quaternary ammonium salts containing one or more ester functions of the following formula (IVa):

in which: - R₂₂ is chosen from C₁-C₆ alkyl groups and C₁-C₆ hydroxyalkyl or dihydroxyalkyl groups, - R₂₃ is chosen from the group R₂₆-C(=O)-; linear or branched, saturated or unsaturated C₁-C₂₂ hydrocarbon-based groups R₂₇; and a hydrogen atom, - R₂₅ is chosen from the group R₂₈-C(=O)-; linear or branched, saturated or unsaturated C₁-C₆ hydrocarbon-based groups R₂₉; and a hydrogen atom, R₂₄, R₂₆ and R₂₈, which may be identical or different, are chosen from linear or branched, saturated or unsaturated C₇-C₂₁ hydrocarbon-based groups, - r, s and t, which may be identical or different, are integers ranging from 2 to 6, - r1 and t1, which may be identical or different, are equal to 0 or 1, - y is an integer ranging from 1 to 10, - x and z, which may be identical or different, are integers ranging from 0 to 10, - X- is an anion, it being understood that r2 + r1 = 2r and t1 + t2 = 2t, and that the sum x + y + z ranges from 1 to 15, provided that when x = 0 then R₂₃ denotes R₂₇ and when z = 0 then R₂₅ denotes R₂₉, ^ the amidoamines comprising at least one C₆-C₃₀ hydrocarbon chain, preferably corresponding to formula (Va) below: RCONHR’’N(R’)2 (Va) in which: - R represents a substituted or unsubstituted, linear or branched, saturated or unsaturated monovalent hydrocarbon-based radical containing from 5 to 29 carbon atoms, preferably from 7 to 23 carbon atoms, and in particular a linear or branched C5- C29 and preferably C7-C23 alkyl radical, or a linear or branched C5-C29 and preferably C7-C23 alkenyl radical; - R’’ represents a divalent hydrocarbon-based radical containing less than 6 carbon atoms, preferably from 2 to 4 carbon atoms and better still 3 carbon atoms; and - R’, which are identical or different, represent a substituted or unsubstituted, saturated or unsaturated, linear or branched, monovalent hydrocarbon-based radical containing less than 6 carbon atoms, preferably from 1 to 4 carbon atoms, preferably a methyl radical. 15. Packaging article according to any one of the preceding claims, characterized in that the solid composition also comprises one or more fatty substances, preferably chosen from liquid fatty substances, preferentially chosen from plant oils, liquid fatty esters of a fatty acid and/or of a fatty alcohol, amino silicones and mixtures thereof, more preferentially from sunflower oil, corn oil, soybean oil, marrow oil, grapeseed oil, sesame oil, hazelnut oil, apricot oil, macadamia oil, arara oil, castor oil, avocado oil, isopropyl myristate, coco caprylate/caprate, amino silicones such as amodimethicones and bis-amino silicones, and mixtures thereof. 16. Packaging article according to any one of the preceding claims, characterized in that the solid composition also comprises one or more cationic polymers, preferably chosen from cationic polysaccharides, alkyldiallylamine or dialkyldiallylammonium cyclopolymers and mixtures thereof, more preferentially from mixtures of cationic galactomannan gums and alkyldiallylamine or dialkyldiallylammonium cyclopolymers, even better still from mixtures of cationic guar gums and copolymers of diallyldimethylammonium and acrylamide salts (for example chloride). 17. Packaging article according to any one of the preceding claims, characterized in that the solid composition also comprises one or more amphoteric surfactants, preferably chosen from (C₈-C₂₀)alkylbetaines, (C₈-C₂₀)alkylamido(C₃- C₈)alkylbetaines and mixtures thereof, preferentially from (C₈-C₂₀)alkylamido(C₃- C₈)alkylbetaines and mixtures thereof. 18. Packaging article according to any one of the preceding claims, characterized in that the solid composition also comprises one or more C₁-C₆ carboxylic acids, preferably corresponding to formula (Xa) below:

in which: A is a monovalent group when n is 0, or a polyvalent group when n is greater than or equal to 1; A represents a saturated or unsaturated, cyclic or non-cyclic, aromatic or non-aromatic hydrocarbon-based group comprising from 1 to 6 carbon atoms, optionally interrupted with one or more heteroatoms, and/or substituted with one or more hydroxyl and/or amino groups; preferably, A represents a monovalent C₁- C₆ alkyl or phenyl group, or a polyvalent C₁-C₆ alkylene or phenylene group optionally substituted with one or more hydroxyl groups; n represents an integer ranging from 0 to 10, preferably from 0 to 5, and better still from 0 to 2, more preferably, the C₁-C₆ carboxylic acid(s) are chosen from salicylic acid, citric acid, glutaric acid and lactic acid, and mixtures thereof. 19. Packaging article according to any one of the preceding claims, characterized in that the solid composition comprises: - one or more starch phosphates, - one or more additional starches, different from the starch phosphates, - optionally, one or more compounds chosen from cationic surfactants, fatty substances, polyols and mixtures thereof. 20. Packaging article according to any one of Claims 1 to 18, characterized in that the solid composition comprises: - one or more starch phosphates, - one or more C₁-C₆ carboxylic acids, -optionally, one or more compounds chosen from cationic polymers, amphoteric surfactants, polyols and mixtures thereof. 21. Process for cosmetic treatment of keratin fibres, in particular human keratin fibres such as the hair, comprising a step of using a packaging article according to any one of the preceding claims; preferably said cosmetic treatment process comprises the following steps: i) mixing the packaging article in a composition that is capable of dissolving, totally or partially, the envelope of said packaging article, ii) applying the composition obtained in step i) to the keratin keratin materials, notably keratin fibres, iii) optionally leaving on said composition, iv) rinsing said keratin materials, notably keratin fibres, and v) optionally drying said keratin materials, notably keratin fibres. 22. Use of a packaging article according to any one of Claims 1 to 20, for caring for keratin materials, notably keratin fibres, in particular human keratin fibres such as the hair.