WO2025219678A1 - Microspheres of cosmetic ingredients - Google Patents

Abstract

The inventors have advantageously developed microspheres of cosmetic ingredient(s) having a volume diameter d(50) of between 0.5 and 20 µm, and allowing the formulation of cosmetic ingredient(s) in cosmetic compositions without temperature constraints, while preserving the efficacy and sensory properties thereof.

Description

Description T_{iter: Microspheres of cosmetic ingredients}Technical field_{[0001] The present disclosure relates to the field of formulation of cosmetic compositions.}Prior art_{[0002] Ingredients play an essential role in the formulation of cosmetic products that this}whether hair, hygiene or makeup products. Each ingredient provides specific properties, contributing to the effectiveness and sensory experience of users._{[0003] However, these cosmetic ingredients pose challenges during their formulation. Some}Some of them are sensitive to factors such as heat, pH, light or oxygen. Others require specific reaction conditions, such as heating. Finding the right balance between formulation efficiency, raw material compatibility and process simplification is a major challenge for cosmetic formulators._{[0004] Typically, cosmetic ingredients that require heating of the mixture}reaction impose significant constraints. Indeed, this temperature rise can be_{incompatible with the introduction of other components into the formulation and thus risks altering the}properties of heat-sensitive ingredients._{[0005] Furthermore, the formulation of these ingredients to be heated may also require}the addition of additional ingredients, either to form an emulsion or to be co-solubilized, thus complicating the formulation._{[0006] Finally, if the heating is not carried out at a temperature suitable for the active ingredient,}Phase separation problems between constituents may occur, altering the texture and performance of the product or resulting in non-uniform distribution of the ingredient throughout the product._{[0007] It is therefore necessary to develop active cosmetic ingredients which can can easily be incorporated into any type of galenic, without the need to heat them or}only at moderate heating, while preserving their properties in terms of efficiency and stability. Summary_{[0008] The inventors have advantageously developed microspheres of ingredient(s) cosmetic(s) with a volume diameter d(50) between 0.5 and 20 µm, and allowing the}formulation of cosmetic ingredient(s) in cosmetic compositions without temperature constraints, while preserving its effectiveness and sensory properties._{[0009] Thus, the microspheres according to the invention can be used in any type of galenic whether solid or liquid, in varying proportions, in a fatty phase or aqueous or within a powder, without the addition of co-formulants, necessary for integration into the formula, nor heating step. Their "ready to use" nature simplifies the process of} formulation. In addition, the absence of heating or the use of moderate heating for their_{formulation allows significant energy savings during formulation processes. [0010] In addition, the ingredients in the form of microspheres according to the invention can be formulated with a priori incompatible active ingredients, such as thermosensitive active ingredients, which}would otherwise be unusable in a formulation requiring a heating step._{[0011] Advantageously, the integration of this technology within a formulation does not affect the integrity of the microspheres. Indeed, the inventors were able to demonstrate, for example, that an extrusion process used to formulate a solid shampoo from syndet, comprising these microspheres do not alter their structure. After solubilization of the shampoo in water, and therefore}when using the shampoo, the microspheres remain intact._{[0012] Furthermore, and unexpectedly, the inventors have demonstrated that the formulation}of cosmetic ingredient in the form of a microsphere according to the invention makes it possible to improve the properties of the cosmetic ingredient, both during its application and its cosmetic properties._{[0013] Thus, the present invention relates to microspheres of cosmetic ingredient, of diameter}in volume d(50) between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8 µm, the cosmetic ingredient having a melting point above 30°C and in_{which: - when the cosmetic ingredient is other than a wax, it represents at least 80% by mass}said microspheres, and_{- when the cosmetic ingredient is a wax, it represents at least 95% by mass of said}microspheres._{[0014] The present invention also relates to microspheres with a volume diameter d(50)}between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8 µm, said microspheres comprising at least one ingredient and at least one wax, said cosmetic ingredient having a melting point above 30°C and not being a wax._{[0015] The present invention also relates to a method for manufacturing microspheres.}according to the invention, said microspheres being obtained in the form of a suspension in an aqueous medium._{[0016] The present invention also relates to an aqueous suspension of microspheres. [0017] The present invention therefore also relates to microspheres, preferably a}suspension of microspheres capable of being obtained by a process according to the invention._{[0018] Advantageously still, the spherical shape, with a volume granulometry d(50) included}between 0.5 and 20 µm allows easy mechanical adhesion to hair from 30 µm (fine hair) to 70 µm (thick hair). The particle size/hair size ratio promotes particle adhesion to the hair. This adhesion provides better resistance to particle leaching when rinsing shampoo, for example. Indeed, the ingredient will be able to settle It adheres to the hair by friction. The application is therefore uniform across the hair's surface and resists rinsing with water._{[0019] Thus, the present invention is particularly interesting in the hair field, and can also be used in the field of personal hygiene as well as makeup. [0020] The present invention therefore relates to a cosmetic composition comprising}microspheres according to the invention and a physiologically acceptable medium._{[0021] Finally, the inventors compared a solid shampoo made from syndet comprising a cosmetic ingredient as commercially available (i.e., not formulated in the form of microspheres) to a solid shampoo made from syndet including the microspheres}of cosmetic ingredient according to the invention. It has been demonstrated during a consumer test that the implementation_{in the form of the cosmetic ingredient in the form of microspheres allows to improve its properties}during its application (improved foam production, sensoriality during application and improved rinsing) but also from a cosmetic point of view (improved detangling, hair protection, cleaning, shine, styling, softness, character)._{[0022] Another comparative study clearly demonstrates the benefits provided by the formulation of a moisturizing active ingredient in the form of microspheres according to the invention compared to the active ingredient alone.}equal concentration (0.3%), the active ingredient in microspheres has a significantly higher moisturizing efficacy. It is particularly notable that even by tripling the concentration of the active ingredient alone (1%), it does not consistently achieve the efficacy of the formulated active ingredient_{according to the invention. These results confirm the substantial improvement in moisturizing efficacy}provided by the microsphere technology according to the invention._{[0023] Thus, the subject of the present invention is the use of the microspheres according to the invention for}improve the performance of said cosmetic ingredient. Brief description of the drawings_{[0024] Other features, details and advantages will become apparent upon reading the description. detailed below, and to the analysis of the attached drawings, on which:}Fig. 1_{[0025] [Fig.1] shows in optical microscopy carried out on a Paralux L110 S2 Trino 1600X microscope}equipped with a DinoEye eyepiece camera, a microsphere according to the invention of the Cosmegreen surfactant on a hair fiber. Fig.2_{[0026] [Fig.2] shows in optical microscopy carried out on a Paralux L110 S2 Trino 1600X microscope equipped with a DinoEye eye camera, the clusters of Cosmegreen surfactant when formulated}in its commercial form in a solid shampoo. _{[0027] [Fig.3] shows in optical microscopy carried out on a Paralux L110 S2 Trino 1600X microscope equipped with a DinoEye eyepiece camera, the presence of Cosmegreen microspheres after}solubilization of solid shampoo in water. Fig.4_{[0028] [Fig.4] shows in optical microscopy carried out on a Paralux L110 S2 Trino 1600X microscope equipped with a DinoEye eyepiece camera, the presence of Cosmegreen microspheres on a}hair before rinsing. Fig.5_{[0029] [Fig.5] shows, in optical microscopy carried out on a Paralux L110 S2 Trino 1600X microscope}equipped with a DinoEye eye camera, the presence of Cosmegreen microspheres on a hair after rinsing. Fig.6_{[0030] [Fig. 6] is a graph illustrating the evolution of skin hydration after applications repeated – Evaluation of the moisturizing effect of an active ingredient in the form of microspheres according to the invention}(n=4). Fig.7_{[0031] [Fig.7] represents the comparison of the moisturizing effectiveness between the active ingredient in the form of microspheres according to the invention and the active ingredient alone at different concentrations (Figure 7A, comparison with}equal concentration, Figure 7B, comparison with tripled concentration of the active ingredient alone). Detailed description_{[0032] Cosmetic ingredient microspheres [0033] According to one embodiment, the present invention relates to ingredient microspheres}cosmetic, with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10_{µm, preferably between 2 and 8 µmthe cosmetic ingredient having a melting point above 30°C, and in which: - when the cosmetic ingredient is other than a wax, it represents at least 80% in}mass of said microspheres, and_{- when the cosmetic ingredient is a wax, it represents at least 95% by mass of said}microspheres._{[0034] According to this embodiment, each microsphere of cosmetic ingredient is composed}mainly cosmetic ingredient, whether it is a wax or not._{[0035] The cosmetic ingredient is different from a wax [0036] According to one embodiment, the present invention relates to ingredient microspheres}cosmetic, with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, preferably between 2 and 8 µm, preferably between 2 and 5 µm, said ingredient _{cosmetic having a melting point above 30°C and being different from a wax, and representing at least 80% by mass of said microspheres. [0037] When the cosmetic ingredient is other than a wax, microsphere is understood to mean composed mainly of the cosmetic ingredient, a microsphere composed of at least 80%}by mass of said cosmetic ingredient, relative to the total mass of the microsphere, preferably at least 81%, preferably at least 82%, preferably at least 83%, preferably at least 84%, preferably at least 85%, preferably at least 86%, preferably at least 87%, preferably at least 88%, preferably_{at least 89% by mass of said cosmetic ingredient, preferably at least 90% by mass,}relative to the total mass of the microsphere, preferably at least 91%, preferably at least 92%, preferably at least 93%, preferably at least 94%, preferably at least 95%, preferably at least 96%, preferably at least 97%, preferably at least 98%, preferably at least 99% by mass of said cosmetic ingredient, relative to the total mass of the microsphere. Preferably again, the microsphere is composed of 100% by mass of said cosmetic ingredient, relative to the total mass of the microsphere._{[0038] According to one embodiment, the cosmetic ingredient may be a mixture of ingredients cosmetic, each cosmetic ingredient having a melting point above 30°C and each}cosmetic ingredient that is not a wax._{[0039] According to this embodiment, the cosmetic ingredient microspheres do not comprise}of waxes._{[0040] The cosmetic ingredient microsphere may comprise, in a minor manner, one or}several of the surfactants and/or one or more of the colloids used during the microsphere manufacturing process. They are to be distinguished from the cosmetic ingredient(s) forming the microsphere._{[0041] Thus, according to this embodiment, each microsphere of cosmetic ingredient comprises a content of less than 20% by mass of at least one surfactant and/or at least one colloid, for example}relative to the total mass of the microsphere, preferably, a content of less than 19%, preferably less than 18%, preferably less than 17%, preferably less than 16%, preferably less than 15%, preferably less than 14%, preferably less than 13%, preferably less than 12%, preferably_{less than 11% by mass, preferably less than 10% by mass, relative to the mass}total mass of the microsphere, preferably a content of less than 9%, preferably less than 8%, preferably less than 7%, preferably less than 6%, preferably less than 5%, preferably less than 4%, preferably less than 3%, preferably less than 2%, preferably less than 1% by mass of at least one surfactant and/or at least one colloid, relative to the total mass of the microsphere._{[0042] Thus, according to this embodiment, each microsphere is composed of at least one cosmetic ingredient which is not a wax, and possibly at least one surfactant and/or} less than one colloid. This means that each microsphere does not contain any amphiphilic product, waxes, stabilizers, or other additives other than the cosmetic ingredient or a mixture of cosmetic ingredients and possibly one or more surfactants and/or colloids._{[0043] According to one embodiment, each microsphere may further comprise an active ingredient which}is not a cosmetic ingredient within the meaning of the present invention and which is chosen from a vegetable oil or a sunscreen. According to this embodiment, each microsphere of cosmetic ingredient comprises an active ingredient content of between 0 and 20%, preferably between 1 and 15%, preferably between 2 and 10%._{[0044] When the cosmetic ingredient is a wax [0045] According to one embodiment, the present invention relates to ingredient microspheres}cosmetic, with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10_{µm, preferably between 2 and 8 µm, said ingredient being a wax, and represents at least 95%}in mass of said microspheres._{[0046] When the cosmetic ingredient is a wax, the term “compound microsphere” means predominantly of the cosmetic ingredient, a microsphere composed of at least 95% by mass}of said cosmetic ingredient, relative to the total mass of the microsphere, preferably at least 96%, preferably at least 97%, preferably at least 98%, preferably at least 99% by mass of said cosmetic ingredient, relative to the total mass of the microsphere. Preferably again, the microsphere is composed of 100% by mass of said cosmetic ingredient, relative to the total mass of the microsphere._{[0047] According to one embodiment, the cosmetic ingredient may be a mixture of waxes. [0048] The cosmetic ingredient microsphere may comprise, in a minor manner, one or}several of the surfactants and/or one or more of the colloids used during the microsphere manufacturing process._{[0049] Thus, according to this embodiment, each microsphere of cosmetic ingredient comprises a content of less than 5% by mass of at least one surfactant and/or at least one colloid, for example}relative to the total mass of the microsphere, preferably less than 4%, preferably less than 3%, preferably less than 2%, preferably less than 1% by mass of at least_{at least one surfactant and/or at least one colloid, relative to the total mass of the microsphere. [0050] Thus, according to this embodiment, each microsphere is composed of at least one cosmetic ingredient which is a wax, and optionally at least one surfactant and/or at least}a colloid. This means that each microsphere does not contain an amphiphilic product,_{stabilizer or other additives which is not a wax or a mixture of waxes and possibly one or}several surfactant(s) and/or colloid(s)._{[0051] The microspheres according to the invention, whether the cosmetic ingredient is a wax or not, are not}not microspheres composed of a core of active material and a coating, i.e., the microspheres according to the invention do not have a core-shell structure. _{[0052] Indeed, the microspheres of cosmetic ingredient according to the invention are full and the}cosmetic ingredients, are distributed throughout the entire volume of the microsphere, including_{its periphery, without distinction between core and shell. In other words, the ingredient(s) cosmetics are present both at the periphery and in the volume of the microsphere.}preferably, the cosmetic ingredient(s) are distributed uniformly over the entire volume of the microsphere, including its periphery._{[0053] When the cosmetic ingredient microspheres comprise in a minority manner a}or more of the surfactants and/or one or more of the colloids used in the process of_{manufacture of microspheres (and not surfactants qualified as cosmetic ingredients within the meaning of}the present invention), the liposoluble surfactants will be equally distributed over the entire volume of the microsphere including its periphery, without distinction between core and shell. The hydrosoluble surfactants and the colloids will be present at the periphery and/or at the interface. However, and even in the presence in a minority of one or more of the surfactants and/or one or more of the colloids used during the microsphere manufacturing process, the microspheres do not have a core/shell structure._{[0054] Thus, according to one embodiment, the microspheres do not have a structure}heart/bark. According to one embodiment, each microsphere may further comprise an active ingredient which is not a cosmetic ingredient within the meaning of the present invention and which is chosen from a vegetable oil or a sunscreen. According to this embodiment, each cosmetic ingredient microsphere comprises an active ingredient content of between 0 and 5%, preferably between 1 and 4%, preferably between 2 and 3%._{[0055] Microspheres of cosmetic ingredient and wax [0056] According to another embodiment, each microsphere comprises at least one wax and at least one}at least one cosmetic ingredient, said at least one cosmetic ingredient having a melting point above 30°C and not being a wax._{[0057] Thus, the present invention also relates to microspheres, of diameter in volume}d(50) between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8 µm, preferably between 2 and 5 µm, said microspheres comprising at least one ingredient and at least one wax, said cosmetic ingredient having a melting point above 30°C and is different from a wax._{[0058] In the same way as previously, each microsphere can comprise in a manner minority, one or more of the surfactants and/or one or more of the colloids used during the}manufacturing process of microspheres. They must be distinguished from the cosmetic ingredient(s) forming the microsphere._{[0059] Thus, according to one embodiment, a microsphere comprises a content of less than 20%}by mass of at least one surfactant and/or at least one colloid, relative to the total mass of the microsphere, preferably a content of less than 19%, preferably less than 18%, preferably less than 17%, preferably less than 16%, preferably less than 15%, preferably less than 14%, preferably less than 13%, preferably less than 12%, preferably less than 11% by mass, preferably less than 10% by mass of at least one surfactant and/or at least one colloid, relative to the total mass of the microsphere, preferably a content of less than 9%, preferably less than 8%, preferably less than 7%, preferably less than 6%, preferably less than 5%, preferably less than 4%, preferably less than 3%, preferably less than 2%, preferably less than 1% by mass of at least one surfactant and/or at least one colloid, relative to the total mass of the microsphere._{[0060] According to one embodiment, each microsphere comprises from 1 to 10% by mass of at least one of the following: at least one cosmetic ingredient having a melting point above 30°C and not being a}wax, from 90 to 99% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0061] According to one embodiment, each microsphere comprises from 10 to 20% by mass of at least one of the following: at least one cosmetic ingredient having a melting point above 30°C and not being a}wax, from 80 to 90% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0062] According to one embodiment, each microsphere comprises from 20 to 30% by mass of at least one of the following: at least one cosmetic ingredient having a melting point above 30°C and not being a}wax, from 70 to 80% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0063] According to one embodiment, each microsphere is composed of 30 to 40% by mass of at least one cosmetic ingredient having a melting point above 30°C and not being}a wax, from 70 to 80% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0064] According to one embodiment, each microsphere is composed of 40 to 50% by mass of at least one cosmetic ingredient having a melting point above 30°C and not being}a wax, from 50 to 60% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0065] According to one embodiment, each microsphere is composed of 50 to 60% by mass of at least one cosmetic ingredient having a melting point above 30°C and not being}a wax, from 40 to 50% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0066] According to one embodiment, each microsphere is composed of 60 to 70% by mass of at least one cosmetic ingredient having a melting point above 30°C and not being}a wax, from 30 to 40% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid. _{[0067] According to one embodiment, each microsphere is composed of 70 to 80% by mass of at least one cosmetic ingredient having a melting point above 30°C and not being}a wax, from 20 to 30% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0068] According to one embodiment, each microsphere is composed of 80 to 90% by mass of at least one cosmetic ingredient having a melting point above 30°C and not being}a wax, from 20 to 10% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant and/or at least one colloid._{[0069] According to one embodiment, each microsphere is composed of 90 to 99% by mass of at least one cosmetic ingredient having a melting point above 30°C and not being a wax, from 1 to 10% by mass of at least one wax and from 0 to 20% by mass of at least one surfactant}and/or at least one colloid._{[0070] According to this embodiment, each microsphere is composed of at least one ingredient cosmetic having a melting point above 30°C and which is not a wax, of at least one}wax and optionally at least one surfactant and/or at least one colloid. This means that each microsphere does not contain any amphiphilic product, stabilizer or other additives that are not the wax or a mixture of waxes, the cosmetic ingredient or a mixture of cosmetic ingredients and optionally one or more surfactants and/or colloids._{[0071] The microspheres according to the invention are not microspheres composed of a core of}active material and a coating, i.e., the microspheres according to the invention do not have a core-shell structure._{[0072] Indeed, the microspheres of cosmetic ingredient according to the invention are full and the cosmetic ingredients, the wax(es) and any colloids or surfactants, are distributed over}the entire volume of the microsphere, including its periphery, without distinction between core and shell. In other words, the cosmetic ingredient(s), the wax(es) are present both at the periphery and in the volume of the microsphere. Thus, and preferably, the cosmetic ingredient(s), the wax(es) are distributed uniformly over the entire volume of the microsphere, including its periphery._{[0073] When the cosmetic ingredient microspheres comprise in a minority manner a}or more of the surfactants and/or one or more of the colloids used in the process of_{manufacture of microspheres (and not surfactants qualified as cosmetic ingredients within the meaning of}the present invention), the liposoluble surfactants will be equally distributed over the entire volume of the microsphere including its periphery, without distinction between core and shell. The hydrosoluble surfactants and the colloids will be present at the periphery and/or at the interface. However, and even in the presence in a minority of one or more of the surfactants and/or one or more of the colloids used during the microsphere manufacturing process, the microspheres do not have a core/shell structure. _{[0074] According to one embodiment, each microsphere may further comprise an active ingredient which}is not a cosmetic ingredient within the meaning of the present invention and which is chosen from a vegetable oil or a sunscreen. According to this embodiment, each microsphere of cosmetic ingredient comprises an active ingredient content of between 0 and 5%, preferably between 1 and 4%, preferably between 2 and 3%._{[0075] The microspheres according to the invention are to be distinguished from particles described in the prior art.}A particle, in general, refers to a fragment of matter such as a cosmetic ingredient having finite dimensions and any shape. It is a generic term that encompasses any small body, whether regular or irregular, natural or manufactured, without any particular specification regarding its internal structure or composition. Particles can be obtained by various processes, such as fragmentation, precipitation, crystallization or agglomeration, and can have very different characteristics in terms of shape, size, density and structural organization. They can be homogeneous or heterogeneous, solid or hollow, smooth or rough, and their composition can be uniform or layered._{[0076] This general definition is fundamentally opposed to microspheres as defined}in the present invention, which have specific structural and compositional characteristics: they are solid, spherical in shape, and the ingredient is distributed uniformly over_{their entire volume, including the periphery, without distinction between a core and a bark.}This particular structural organization and homogeneous distribution constitute important distinguishing characteristics that differentiate microspheres from a simple particle, the latter not necessarily implying such a definite internal organization._{[0077] Volume particle size distribution [0078] The volume diameter d(50) refers to the median particle diameter in the distribution}granulometric. According to the commonly accepted definition, the median diameter corresponds to the theoretical opening of a sieve such that 50% of the particles, by volume, have a diameter greater than and 50% a diameter less than d(50)._{[0079] The volume diameter d(50) is measured by laser diffraction granulometry. For this,}The sample to be analyzed is first diluted in water with the addition of a non-ionic dispersant. An optical microscopy observation is carried out beforehand to ensure the deagglomeration of the particles. The measurement is carried out on a Fritsch Analysette 22 NeXT Nano granulometer with an obscuration of between 5 and 15%. The results are interpreted using Mie theory._{[0080] According to one embodiment, the volume diameter d(50) is between 1 and 10µm and}preferably, between 2 and 8 µm, and even more preferably between 2 and 7 µm. This embodiment is particularly advantageous in hair applications._{[0081] According to one embodiment, and when the cosmetic ingredient is Cosmegreen, the diameters d(10) and d(90), also measured by laser diffraction granulometry, are the following: - the diameter d(10) is between 0.1 and 2.5µm, preferably less than 1µm - the diameter d(90) is between 8 and 20 µm, preferably less than 10 µm. [0082] The terms d(10) and d(90) also refer to parameters in the distribution}granulometric. D(10) corresponds to the theoretical opening of a sieve such that 10% of the particles,_{in volume, have a diameter less than d(10), and that d(90) corresponds to the theoretical opening of a}sieve such that 90% of the particles, by volume, have a diameter less than d(90)._{[0083] Cosmetic ingredient [0084] The microspheres may be composed of a single ingredient or a mixture}of two or more ingredients._{[0085] According to one embodiment, the cosmetic ingredient according to the invention has a point of}melting above 30°C and is not a wax._{[0086] Preferably, the cosmetic ingredient has a melting point above 40°C, preferably greater than 50°C, preferably greater than 60°C, preferably}above 70°C, preferably above 73°C._{[0087] The melting point will be measured by any technique known to those skilled in the art. [0088] Generally, the melting point of the cosmetic ingredient can be measured using}a differential scanning calorimeter (DSC), for example the calorimeter sold under the name DSC 30 by the METTLER Company._{[0089] According to one embodiment, the cosmetic ingredient is not water-soluble. [0090] When the cosmetic ingredient has a melting point above 30°C and is not a wax, the cosmetic ingredient is chosen from surfactants, butters, oils and their}mixtures, preferably surfactants and mixtures of at least one butter and at least one oil._{[0091] Surfactants [0092] According to one embodiment, the cosmetic ingredient is a surfactant. Preferably, the surfactant is an anionic or cationic surfactant, and preferably still a surfactant}cationic._{[0093] According to a preferred embodiment, the surfactant is chosen from glycine derivatives betaine, Cetrimonium chloride, Behenoyl PG-Trimonium chloride, Polyglyceryl-10 Stearate, Distearoylethyl Hydroxyethylmonium Methosulfate, Cetearyl Alcohol, Distearoylethyl Dimonium Chloride, Distearoylethyl Dimonium Chloride Cetearyl Alcohol,} Behentrimonium Methosulfate, BrassicylIsoleucinateEsylate(and) Brassica Alcohol and their mixtures _{[0094] According to one embodiment, the surfactant is chosen from glycine betaine derivatives,} Distearoylethyl Dimonium Chloride Cetearyl Alcoho, BrassicylIsoleucinateEsylate(and) Brassica _{Alcohol and their mixtures. Glycine betaine derivatives are described in application FR3099058. [0095] According to one embodiment, the glycine betaine derivatives are ester or amide salts.}glycine betaine containing 14 to 24 carbon atoms._{[0096] According to one embodiment, the glycine betaine derivatives are of formula}[Chem 1]_{Xn-[(CH3)3N+-CH2-COZ-R]n where:}Z denotes an oxygen atom or a -NH group, R is a linear or branched, saturated or unsaturated alkyl group, comprising from 14 to 24 atoms of_{carbon, preferably, the radical R is chosen from the myristyl (C14:0), cetyl groups}(C16:0), palmitoleyl (C16:1), stearyl (C18:0), oleyl (C18:1), linoleyl (C18:2), linolenyl (C18:3), arachidyl (C20:0), arachidonyl (C20:4), behenyl (C22:0), 2-hexyldecyl, 2-octyldodecyl and 2-decyltetradecyl, and preferably the radical R is chosen from the arachidyl groups_{(C20:0) or behenyl (C22:0). X is an organic or inorganic anion, preferably, the anion X is chosen from a chloride,}a sulfate, a perchlorate, an alkyl sulfate ion, in particular decyl sulfate or lauryl sulfate, an arylsulfonate ion, in particular benzene sulfonate, paratoluene sulfonate, an alkylsulfonate ion, in particular triflate, methanesulfonate, ethanesulfonate, decylsulfonate, laurylsulfonate, camphorsulfonate, or a sulfosuccinate ion, preferably from among the alkylsulfonates and the arylsulfonates, more particularly from among the methanesulfonate, triflate, paratoluenesulfonate and camphorsulfonate ions, better still, X is the methanesulfonate ion. and n is 1 or 2._{[0097] According to one embodiment, the glycine betaine derivatives are in the form of a composition comprising:}(a) at least one glycine betaine ester salt of formula [Chem 2]_{Xn-[(CH3)3N+-CH2-COO-R]n where R is a linear or branched, saturated or unsaturated alkyl group,}comprising from 14 to 24 carbon atoms and preferably from 18 to 22 carbon atoms, (b) at least one fatty alcohol of formula R-OH, (c) an organic or inorganic acid of formula XH, and (d) a glycine betaine salt of formula [Chem 3] Xⁿ-[(CH3)3N⁺-CH2-COOH]n, where X is an organic or inorganic anion and n is 1 or 2._{[0098] According to this embodiment, the glycine betaine derivatives in the form of a composition contains:}(a) from 15 to 45% by weight, preferably from 20 to 30%, more preferably from 25 to 30% by weight, of glycine betaine ester salt, (b) from 55 to 70% by weight, for example from 60 to 65% or from 65 to 70% by weight, of fatty alcohol, (c) from 0 to 5% by weight, for example from 0 to 1% by weight of organic or inorganic acid, (d) from 0 to 3% by weight, for example from 0 to 1% by weight, of glycine betaine salt, (e) from 0 to 15% by weight, for example from 2 to 10% by weight, of dialkyl ether._{[0099] According to one embodiment, the glycine betaine derivatives are in the form of a composition comprising:}(a) one or more glycine betaine amide salt(s) of formula [Chem 4] Xⁿ-[(CH3)3N⁺-CH2-CONH-R]n where R is a linear or branched, saturated or unsaturated alkyl group comprising from 14 to 24 carbon atoms and preferably from 16 to 22 carbon atoms; (b) one or more alkylammonium salt(s) of formula [Chem 5]_{Xn- [NH3+R]n where R is a linear or branched, saturated or unsaturated alkyl group comprising from 14 to}24 carbon atoms and preferably from 16 to 22 carbon atoms; (c) one or more glycine betaine ester salts of formula [Chem 6] Xⁿ-[(CH3)3N⁺-CH2-COOR’]n where R' is a linear or branched, saturated or unsaturated alkyl radical containing from 4 to 8 carbon atoms; and (d) glycine betaine of formula [Chem 7] (CH3)3N⁺-CH2-COO-; where X is an organic or inorganic anion and n is 1 or 2._{[0100] For illustrative purposes, the glycine betaine derivatives as defined above are CosmeGreen™ ES1822+ and CosmeGreen™ MB1618 marketed by the company SurfactGreen. These}cationic surfactants are in the form of granules and correspond, in the present application,_{to the name “Cosmegreen” or “Cosmegreen in its commercial form”, i.e., in the form}of granules and not in the form of microspheres according to the present invention._{[0101] Butters [0102] The term “butter” means a lipophilic compound, solid at room temperature (25°C), at}reversible solid/liquid change of state, either by melting, glass transition or by softening between 25°C and 40°C._{[0103] The term “solid” means an object characterized on a macroscopic scale by a volume and a}determined forms, constant in the absence of any external force or extreme condition._{[0104] Among the butters, we will mention shea butter, mango butter, cocoa butter, cupuaçu butter, pracaxi butter, murumuru butter, Shorea robusta butter}(Sal Butter)._{[0105] Oils [0106] By “oil” is meant a lipophilic compound, liquid at room temperature (25°C),}composed mainly of triglycerides or esters, with varying degrees of viscosity, which does not undergo No phase transition to solid under normal atmospheric pressure until cooled below 25°C. The oils provide immediate and penetrating emollient effects._{[0107] In one embodiment, the oil is selected from natural oils such as}vegetable oils, mineral oils, synthetic oils and their mixtures._{[0108] Natural oils: [0109] Natural oils are derived from various parts of plants, including seeds,}nuts and fruits._{[0110] Natural oils can be chosen from linseed oil (oil rich in omega 3), oils extracted from microalgae such as Schizochytium sp. Oil (oil rich in DHA), Oil}Argan Oil, Almond Oil, Avocado Oil, Jojoba Oil, Coconut Oil, Olive Oil, Grapeseed Oil, Sunflower Oil, Rosehip Oil, Evening Primrose Oil, Marula Oil, Macadamia Oil, Hemp Oil, Sea Buckthorn Oil, Camellia Oil, Pomegranate Seed Oil, Safflower Oil, Castor Oil, Baobab Oil, Moringa Oil, Meadowfoam Seed Oil, Neem Oil, Tamanu Oil, Cumin Seed Oil_{Black, Kukui Nut Oil, Camelina Oil, Chia Oil, Borage Oil, Squalane}of olive origin and their mixtures._{[0111] Mineral oils: [0112] Mineral oils are derived from petroleum and are highly refined for use}cosmetics._{[0113] Common examples of mineral-derived ingredients used in formulations}Cosmetics include Mineral Oil, Petrolatum, Paraffin Oil, and Polyisobutene._{[0114] Synthetic oils: [0115] Synthetic oils may be silicone oils, ester oils or oils}of hydrocarbons._{[0116] The silicone oils can be chosen from Dimethicone (Polydimethylsiloxane),}Cyclopentasiloxane (Decamethylcyclopentasiloxane), Phenyl Trimethicone (Trimethylsiloxyphenyl Dimethicone), Isopropyl Myristate, Hydrogenated Polyisobutene, Polyisobutene, Ethylhexyl Palmitate, Caprylic/Capric Triglyceride, C12-15 Alkyl Benzoate, Pentaerythrityl Tetraisostearate, Isododecane, Squalane (Synthetic), Octyldodecanol, Isopropyl Palmitate, Tridecyl Trimellitate, Diisostearyl Malate, Isononyl Isononanoate, Neopentyl Glycol Diheptanoate, Diisopropyl Sebacate, Triethylhexanoin, and PPG-15 Stearyl Ether Dicaprylyl Carbonate, C13-14 Isoparaffin, Cetearyl Ethylhexanoate, Isostearyl Isostearate, Lauryl Lactate, Cetyl Ethylhexanoate, Octyldodecyl Neopentanoate, Lauryl Methacrylate/Glycol Dimethacrylate Crosspolymer, PPG-3 Benzyl Ether Myristate, C18-21 Alkane, Cetearyl Isononanoate, Hydrogenated Polydecene, Polydecene, Methyl Trimethicone, Dimethiconol, Alkyl Benzoate (and) Propanediol Dicaprylate/Dicaprate, Isostearate Isocetyl Stearoyl Triglyceride, Caprylic/Capric/Myristic/Stearic Triglyceride, Diisopropyl Dimer Dilinoleate, Caprylic/Capric/Succinic Triglyceride, PPG-20 Methyl Glucose Ether, and mixtures thereof._{[0117] According to a preferred embodiment, the oil is chosen from linseed oil (oil rich in omega 3), oils extracted from microalgae such as Schizochytium sp. Oil (oil rich in}DHA) and their mixtures._{[0118] Mixtures [0119] According to one embodiment, the cosmetic ingredient is chosen from surfactants,}preferentially cationic and anionic, butters, oils and their mixtures._{[0120] In this context, the expression "and mixtures thereof" means that the cosmetic ingredient may}be made up not only of a single type of compound among those mentioned (cationic or anionic surfactants, butters, oils), but also of a combination of several of these_{compounds. For example, a cosmetic formulation might contain both surfactants and}oils, or a mixture of different types of butters and oils._{[0121] According to one embodiment, the cosmetic ingredient is chosen from surfactants}cationic._{[0122] According to one embodiment, the cosmetic ingredient is chosen from surfactants}anionic._{[0123] According to one embodiment, the cosmetic ingredient is chosen from butters. [0124] According to one embodiment, the cosmetic ingredient is chosen from oils. [0125] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}cationic surfactants and anionic surfactants._{[0126] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}cationic surfactants and butters._{[0127] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}cationic surfactants and oils._{[0128] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}anionic surfactants and butters._{[0129] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}anionic surfactants and oils._{[0130] According to one embodiment, the cosmetic ingredient is chosen from a mixture of butters}and oils._{[0131] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}cationic surfactants, anionic surfactants and butters. _{[0132] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}cationic surfactants, anionic surfactants and oils._{[0133] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}cationic surfactants, butters and oils._{[0134] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}anionic surfactants, butters and oils._{[0135] According to one embodiment, the cosmetic ingredient is chosen from a mixture of}cationic surfactants, anionic surfactants, butters and oils._{[0136] According to one embodiment, the cosmetic ingredient is chosen from a mixture of oil and}butter, and more specifically a mixture of sunflower oil, shea butter and an oily macerate of Aloe Vera._{[0137] Waxes [0138] By "wax" is meant a lipophilic compound, solid at room temperature (25°C), at}reversible solid/liquid change of state, either by melting, glass transition or by softening between 40°C and 120°C._{[0139] According to one embodiment, the waxes have a melting point greater than 40°C. [0140] According to one embodiment, the waxes have a melting point below 70°C. [0141] According to one embodiment, the waxes have a melting point of between 40°C and}strictly less than 70°C._{[0142] According to one embodiment, the waxes can be chosen from (i) waxes}hydrocarbons, optionally substituted, in particular hydroxylated, (ii) fluorinated waxes, (iii) silicone waxes and their mixtures._{[0143] Among the hydrocarbon waxes, mention may be made of hydrocarbon waxes whose melting point}is advantageously greater than 40°C, for example greater than 55°C._{[0144] Generally, the melting point of wax can be measured using a calorimeter.}differential scanning (D.S.C), for example the calorimeter sold under the name DSC 30 by the METTLER Company._{[0145] As hydrocarbon waxes, mention may be made, for example, of hydrocarbon waxes}linear or esters of primary, secondary or tertiary fatty acids. The hydrocarbon waxes can be chosen from linear hydrocarbon waxes. Examples of waxes that can be mentioned are:_{linear hydrocarbons: substituted linear alkanes, unsubstituted linear alkanes,}Unsubstituted linear alkenes, substituted linear alkenes. An unsubstituted compound is composed only of carbon and hydrogen, and the substituents do not contain carbon atoms. Linear hydrocarbon waxes include linear paraffin waxes, such as Strahl & Pitsch's S&P® 206, S&P® 173, and S&P® 434 paraffins. _{[0146] The hydrocarbon waxes can be chosen from esters of fatty acids, saturated or}unsaturated, or derived from unsaturated fatty acids that have been previously hydrogenated to become saturated._{[0147] The wax can thus be chosen from the esters: - capric acid (C10), lauric acid (C12), myristic acid (C14), acid}palmitic acid (C16), stearic acid (C18), arachidic acid (C20), palmitoleic acid (C16), oleic acid (C18), linoleic acid (C18), l_{inolenic (C18), arachidonic acid (C20); and - fatty alcohols, primary, secondary (such as ethylene glycol) or tertiary (such as}glycerol), in C2 to C22, advantageously in C6 to C18, -_{ricinoleic acid (C18) or hydrogenated ricinoleic acid; - fatty alcohols, primary, secondary (such as ethylene glycol) or tertiary (such as}glycerol), C2 to C22, advantageously C6 to C22, better still C16 to C22 and mixtures thereof._{[0148] These esters have melting points which can vary depending on the alcohol incorporated.}from 23°C to 85°C. The waxes selected according to the present invention will be those having a melting point above 40°C._{[0149] Mention may be made of the esters (i) of myristic acid and ethylene glycol or glycerol (ii) of acid}stearic acid and primary and linear C6 fatty alcohols or ethylene glycol or glycerol, (iii) esters of stearic acid and primary and linear C8 fatty alcohols, (iv) esters of stearic acid and primary and linear C10 fatty alcohols, (v) esters of stearic acid and primary and linear C12 fatty alcohols, (vi) esters of stearic acid and primary and linear C14 fatty alcohols, (vii) esters of stearic acid and primary and linear C16 fatty alcohols, (viii) esters of stearic acid and primary and linear C18 fatty alcohols, (ix) esters of ricinoleic acid, hydrogenated or not, and primary and linear C16 fatty alcohols or ethylene glycol or glycerol, (x) esters of ricinoleic acid, hydrogenated or not, and primary and linear C18 fatty alcohols and (xi) esters of ricinoleic acid, hydrogenated or not, and primary and linear C22 fatty alcohols._{[0150] According to one embodiment, the wax is chosen from myristic acid esters and}of ethylene glycol or glycerol, esters of stearic acid and primary and linear C18 fatty alcohols or of ethylene glycol or glycerol, esters of ricinoleic acid, hydrogenated or not, and primary and linear C22 fatty alcohols or of ethylene glycol or glycerol, hydrogenated palm oil. Advantageously, mention may be made of glycerol tristearate and glycerol trimyristate._{[0151] Mention may be made of the ester of stearic acid and primary and linear C16 fatty alcohol with a Tf}between 52 and 57°C, the ester of stearic acid and primary and linear C18 fatty alcohol with a Tm between 54 and 60°C, the esters of hydrogenated ricinoleic acid and primary and linear C16 fatty alcohols with a Tm between 62 and 66°C, the esters of hydrogenated ricinoleic acid and primary and linear fatty alcohols linear C18 with a Tm between 67 and 71°C, hydrogenated ricinoleic acid esters of primary and linear C22 fatty alcohols with a Tm between 71 and 75°C._{[0152] Particularly advantageous waxes for the invention may be cited as the waxes in Table 1. below : [0153] [Table 1]}Name Chemical name INCI Chemical name Number as or description CAS Hydrogenated Castor 22L73 Castor oil - Behenyl esters Hydrogenated Castor oil hydrogenated Castor 16L64 castor oil cetyl esters D_{ynasan 118 Tristearin} 2,3-di(octadecanoyloxy)propyl 555-43- octadecenoate, C57H110O6 1 Hydrogenated Olive 18L.57 olive oil _{Hydrogenated olive oil} stearyl esters Hydrogenated Olive 10L.40 olive oil Hydrogenated olive oil d_{ecyl esters} 68514- Dynasan P60F 74-9 / Hydrogenated 8033- Pa _{Hydrogenated palm oil (}29-2 Vegetable oil lm Hydrogenated oil Softisan 154 S_{hellac SSB 63 Shellac Shellac} 9000-59-3 1,3-di(tetradecanoyloxy)propan-2-yl D_{ynasan 114 Trimyristin} tetradecanoate 555-45- (Glycerol trimyristate),C45H86O6 3 L_{ipoxol 6000 PEG-135} Polyethylene glycol,HO- 25322- (CH2CH2O)135-H 68-3 Copernicia _{Ca Wax}8015- cerifera cera_rnauba 86-9 EUPHORBIA CERIFERA 8006 o_{u Can Wax}- C_{ERA dellila}44-8 Candelilla wax C_{era alba Beeswax} 8012- 89-3 Octadecanoic ac Imwitor 960 K Glyceryl id, reaction produc 11099- Stearate SE ts with 1,2,3-propanetriol (1:1), neutralized 07-3 Glyceryl monostearate, Imwitor 49 Glyceryl Octadecanoic acid, 31566- stearate monoester with 1,2,3-propanetriol, 31-1 C21H42O4 Oryza Sativa Cera / Oryza Sative Bran Rice Wax Wax Hydrogenated Coconut Oil Macadamia Integrifolia Wax Macadamia Wax Rhus Succedanea Sumac Fruit Cera Rhus Verniciflua Peel Cera _{Sumac Berry Wax}Hydrogenated jojoba wax or hydrogenated jojoba oil Hydrogenated sunflower seed oil Helianthus Annuus Seed Wax Sunflower wax Citrus Aurantium Dulcis Peel Orange peel wax Cera Acacia Decurrens Mimosa Flower wax Jasminum Grandifl orum Jasmine Flower wax Rosa Damascena Rose flower wax Myrica Pubescens Fruit Myrica berry wax Cera Camellia Sinensis Leaf wax Green tea leaf wax_{anolin Cera Lanolin wax [0154] According to one embodiment, the waxes are chosen from hydrogenated castor oil, 2,3-}di(octadecanoyloxy)propyloctadecenoate, hydrogenated olive oil, hydrogenated palm oil, shellac, 1,3-di(tetradecanoyloxy)propan-2-yl, carnauba wax, candelilla wax, beeswax, Glyceryl Stearate SE, Glyceryl Stearate, rice wax, hydrogenated coconut oil, macadamia ternifolia wax, sumac wax, sumac berry wax, hydrogenated jojoba oil, hydrogenated sunflower oil, sunflower wax, orange peel wax, mimosa wax, jasmine wax, rose damascena wax, myrica berry wax, green tea leaf wax,_{lanolin wax, and mixtures thereof. [0155] According to one embodiment, the waxes are chosen from hydrogenated olive oil, oil hydrogenated castor oil, 2,3-di(octadecanoyloxy)propyloctadecenoate, rice wax, macadamia, candelilla wax, carnauba wax, hydrogenated jojoba oil, and mixtures thereof. [0156] According to a preferred embodiment, the waxes are chosen from hydrogenated olive oil and hydrogenated castor oil, and mixtures thereof. [0157] Microspheres comprising predominantly at least one chosen cosmetic ingredient}among cationic surfactants_{[0158] According to one embodiment, the present invention relates to microspheres of}cationic or anionic surfactants, with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, preferably between 2 and 8 µm, preferably between 2 and_{5µm representing at least 80% by mass of said microspheres, preferably at least 90% by}mass of said microspheres, and preferably 100%._{[0159] According to one embodiment, the present invention relates to microspheres of}cationic surfactants, with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, preferably between 2 and 8 µm, preferably between 2 and 5 µm_{representing at least 80% by mass of said microspheres, preferably at least 90% by}mass of said microspheres._{[0160] According to one embodiment, the present invention relates to microspheres of cationic surfactants chosen from glycine betaine derivatives, preferably Cosmegreen}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, so as to_{preferred between 2 and 8 µm, preferably between 2 and 5 µm representing at least 80% by mass}of said microspheres, preferably at least 90% by mass of said microspheres._{[0161] According to one embodiment, the present invention relates to microspheres of BrassicylIsoleucinateEsylate(and) Brassica Alcohol with a diameter in volume d(50) between 0.5 and 20 µm, preferably between 1 and 15 µm, preferably between 2 and 12µm, representing at least}80% by mass of said microspheres, preferably at least 90% by mass of said microspheres._{[0162] According to these embodiments (when the microspheres mainly comprise at}at least one cosmetic ingredient chosen from cationic surfactants), the microspheres may further comprise at least one colloid and at least one residual surfactant resulting from the process._{[0163] According to this embodiment, the present invention relates to a compound which comprises: - between 80% and 95% by mass of cationic surfactant, preferably between 85% and 93%,}more preferably between 88% and 92% by mass of said compound; and -_{between 5% and 20% by mass of colloid and/or surfactant, preferably between 7% and 15%,}more preferably between 8% and 12% by mass of said compound._{[0164] Microspheres comprising predominantly at least one wax [0165] According to one embodiment, the present invention relates to microspheres of waxes,}volume diameter d(50) between 0.5 and 20 µm, preferably between 1 and 15 µm, preferably between 2 and 12 µm, and representing at least 95% by mass of said microspheres. _{[0166] According to one embodiment, the present invention relates to wax microspheres}chosen from hydrogenated castor oil, hydrogenated olive oil and their mixtures, with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 15 µm, preferably between 2 and 12 µm, and representing at least 95% by mass of said microspheres._{[0167] According to these embodiments (when the microspheres mainly comprise at}less one wax), the microspheres may further comprise at least one colloid and at least one residual surfactant resulting from the process._{[0168] According to this embodiment, the present invention relates to a compound which comprises: - between 80% and 95% by mass of cationic surfactant, preferably between 85% and 93%,}more preferably between 88% and 92% by mass of said compound; and -_{between 5% and 20% by mass of colloid and/or surfactant, preferably between 7% and 15%,}more preferably between 8% and 12% by mass of said compound._{[0169] Microspheres comprising at least one surfactant and at least one wax [0170] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8 µm, said microspheres comprising at least one ingredient chosen from surfactants and at least one wax._{[0171] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8 µm, said microspheres comprising at least one ingredient chosen from cationic or anionic surfactants and at least one wax._{[0172] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres comprising at least one ingredient chosen from cationic surfactants and at least one wax._{[0173] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres comprising at least one ingredient chosen from the cationic surfactants preferentially chosen_{among the derivatives of glycine betaine, Distearoylethyl Dimonium Chloride Cetearyl Alcohol and their}mixtures, and at least one wax._{[0174] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres comprising at least one ingredient chosen from cationic surfactants chosen from derivatives_{glycine betaine, preferably Cosmegreen, and at least one wax. [0175] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres comprising at least one ingredient chosen from cationic surfactants chosen from derivatives_{glycine betaine, preferably Cosmegreen, and at least one wax chosen from olive oil}hydrogenated, hydrogenated castor oil and mixtures thereof._{[0176] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres_{comprising at least one Distearoylethyl Dimonium Chloride Cetearyl Alcohol and at least one wax. [0177] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres_{comprising at least one Distearoylethyl Dimonium Chloride Cetearyl Alcohol and at least one wax}chosen from hydrogenated olive oil, hydrogenated castor oil and their mixtures._{[0178] According to these embodiments (when the microspheres comprise at least one surfactant, at least one wax), the microspheres may further comprise a residual colloid}used in the process._{[0179] Thus, according to these embodiments, the microspheres comprise: - between 4% and 30% by mass of cationic surfactant, preferably between 4% and 28%,}more preferably between 5% and 28% by mass of said compound; -_{between 60% and 80% by mass of wax, preferably between 64% and 78.5%, more}preferably between 65% and 78.5% by mass of said compound and -_{between 5% and 20% by mass of residual colloid used during the process, preferably}between 7% and 18.5%, more preferably between 7.5% and 18% by mass of said compound._{[0180] According to a first embodiment, when the cationic surfactant is at least one derivative of glycine betaine, preferably Cosmegreen, the microspheres include: - between 3% and 6% by mass of cationic surfactant, preferably between 3.5% and 5%,}more preferably between 4% and 4.5% by mass of said compound; -_{between 75% and 80% by mass of wax, preferably between 76% and 79%, more preferably between 77% and 78.5% by mass of said compound; - between 15% and 20% by mass of residual colloid used during the process, preferably}between 16% and 19%, more preferably between 17% and 18% by mass of said compound._{[0181] According to a second embodiment, when the cationic surfactant is at least one Distearoylethyl Dimonium Chloride Cetearyl Alcohol microspheres include: - between 25% and 30% by mass of cationic surfactant, preferably between 26% and 29%,}more preferably between 27% and 28% by mass of said compound; and -_{between 60% and 70% by mass of wax, preferably between 62% and 67%, more}preferably between 64% and 65% by mass of said compound. -_{between 5% and 10% by mass of residual colloid used during the process, preferably}between 6% and 9%, more preferably between 7% and 8% by mass of said compound._{[0182] Microspheres comprising at least one oil and at least one wax [0183] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres_{comprising at least one ingredient chosen from oils and at least one wax. [0184] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres_{comprising at least one ingredient chosen from oils preferentially chosen from oils rich in omega 3 such as flaxseed oil and DHA such as sunflower oil and their mixtures and}at least one wax._{[0185] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres_{comprising at least one ingredient chosen from oils preferentially chosen from oils rich in omega 3 and DHA and their mixtures and at least one wax, said wax being 2,3- di(octadecanoyloxy)propyl octadecenoate. [0186] According to this embodiment, when the microsphere comprises at least one ingredient chosen}among the oils and at least one wax, the oil/wax ratio is between 40:100 and 80:100,_{preferably between 60:100 and 75:100 and preferably around 68:100. [0187] According to these embodiments (when the microspheres comprise at least one oil and at least one wax), the microspheres may further comprise a residual colloid used}in the process._{[0188] According to this embodiment, the microspheres comprise - Between 40% and 60% by mass of wax, preferably between 45% and 55%, more}preferably between 48% and 52% by mass of said compound; -_{Between 25% and 40% by mass of oils, preferably between 30% and 37%, more}preferably between 32% and 35% by mass of said compound; and -_{Between 10% and 25% by mass of residual colloid used in the process, preferably}between 12% and 20%, more preferably between 14% and 18% by mass of said compound. _{[0189] Microspheres comprising at least one ingredient and at least one wax, the ingredient}being a mixture of at least one oil and at least one butter._{[0190] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres comprising at least one ingredient and at least one wax, the ingredient being a mixture of at least one oil and at least one butter._{[0191] According to one embodiment, the present invention also relates to microspheres,}with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8µm, preferably between 2 and 5µm, said microspheres comprising at least one ingredient and at least one wax, the ingredient being a mixture of sunflower oil, shea butter and an oily macerate of Aloe Vera._{[0192] According to these embodiments (when the microspheres comprise at least one}ingredient and at least one wax, the ingredient being a mixture of at least one oil and at least one_{butter, at least one wax), the microspheres may further comprise a residual colloid}used in the process._{[0193] According to this embodiment, the microspheres comprise: - between 40% and 55% by mass of wax, preferably between 42% and 52%, more}preferably between 45% and 50% by mass of said compound; -_{between 30% and 45% by mass of a mixture of at least one oil and one butter,}preferably between 32% and 40%, more preferably between 33% and 37% by mass of said compound; and -_{between 2% and 10% by mass of residual colloid used in the process, preferably}between 3% and 8%, more preferably between 4% and 6% by mass of said compound._{[0194] Process for obtaining microspheres according to the invention [0195] The microspheres according to the invention may be obtained by the process as described in}patent EP2894978._{[0196] According to one embodiment, the method for obtaining the microspheres according to the present invention, comprises the following steps: (I) Heating a fatty phase comprising (i) at least one wax, and/or (ii) at least one ingredient cosmetic having a melting point above 30°C and not being a wax, at a temperature reaction higher than the melting temperature of said at least one wax and/or said at least}a cosmetic ingredient; (II) Heating a first aqueous phase comprising at least one water-soluble surfactant and_{at least one protective colloid, at said reaction temperature implemented in step (I), under mechanical agitation;}(III) Incorporation of said fatty phase into said first aqueous phase while maintaining the reaction temperature, with mechanical stirring, so as to form an oil-in-oil emulsion_{stable water;}(IV) Addition dropwise, with mechanical stirring, of said emulsion previously formed into a second aqueous phase comprising at least one water-soluble surfactant and/or at least one protective colloid, the temperature of said second phase being lower than the temperature of_{fusion of said wax and/or said cosmetic ingredient. [0197] The cosmetic ingredient and the wax are as defined above. [0198] According to one embodiment, the heating temperature of the fatty phase is higher}at 30°C._{[0199] “Stable” means an emulsion whose particle size does not change over time.}process, or the time required for transfer into the aqueous phase._{[0200] Thus, the method allows the obtaining of microspheres according to the invention, i.e., with a diameter in volume d(50) between 0.5 and 10µm, and composed of: - predominantly of at least one cosmetic ingredient having a melting point higher than 30°C and not being a wax; - mainly at least one wax; - at least one wax and at least one cosmetic ingredient having a melting point}above 30°C and not being a wax._{[0201] These microspheres are as defined above and are suspended in said}second aqueous phase._{[0202] The mere fact that the emulsion obtained in step (III) is added drop by drop makes it possible to obtain the microspheres according to the invention. The use of a protective colloid in the 1st aqueous phase}combined with the dropwise addition of the emulsion allows to further improve the formation of microspheres, whereas the sole presence of a protective colloid without dropwise addition does not allow to produce microspheres._{[0203] Fatty phase [0204] The fatty phase of the process consists of either: - a wax or a mixture of waxes, or - a cosmetic ingredient or a mixture of cosmetic ingredients, each of the ingredients cosmetics having a melting point above 30°C and not being a wax, or - (i) at least one wax and (ii) at least one cosmetic ingredient having a melting point higher than}30°C and not being a wax._{[0205] This means that said fatty phase does not contain any amphiphilic product, stabilizer,}surfactant or co-surfactant, or other additives that are not the wax and/or cosmetic ingredient. _{[0206] The proportions of said at least one wax and said at least one active ingredient may}vary depending on the desired contents of said at least one wax and said at least one active ingredient within the fatty phase. A person skilled in the art is able to determine the proportions._{[0207] The waxes are as described above. [0208] According to one embodiment of the process, the reaction temperature is higher than at least minus 10°C at the melting temperature of said at least one wax and/or said at least one ingredient}cosmetics._{[0209] First and second aqueous phase [0210] According to one embodiment of the method, the surfactant(s) of the first phase}aqueous and/or the second aqueous phase is or are chosen from non-ionic surfactants,_{cationic surfactants and anionic surfactants. [0211] According to one embodiment, the surfactant(s) of the first aqueous phase and/or of}the second aqueous phase is or are chosen from polyoxyethylene stearyl ethers, sodium lauryl sulfonate, polyoxyethylene polyoxypropylene copolymers (AB, ABA, BAB form),_{sorbitan esters and Potassium Cetyl Phosphate. [0212] Mention may be made, as surfactant(s) of the first aqueous phase and/or of the second phase:}aqueous steareth 21, Pluronic®, Tween® and Span® soluble in water and capable of forming an oil-in-water emulsion, and Synperonic®._{[0213] These surfactants are well known to those skilled in the art. [0214] Thus steareth 21 is a polyoxyethylene stearyl ether comprising 21 oxide units}of ethylene per molecule whose CAS number is 9005-00-9. It is commercially available from_{BASF under the brand name Eumulgin S 21®. [0215] Pluronic® is the brand under which BASF markets copolymers}polyoxyethylene polyoxypropylene also called poloxamers._{[0216] Tween® and Span® are the brands under which Croda markets esters}oxyethylenated sorbitan fatty acids. Synperonic® is the brand under which Croda markets polyethylene polypropylene glycol copolymers._{[0217] Amphisol K® is the brand under which DSM markets Potassium Cetyl Phosphate. [0218] The first aqueous phase as well as the second aqueous phase in accordance with the invention can comprise from 0.1 to 2.5% by mass, relative to the total mass of said aqueous phase, of at least}less than one surfactant in accordance with the invention, preferably from 0.1 to 1% by mass, and more particularly from 0.25 to 0.5% by mass relative to the total mass of said aqueous phase._{[0219] According to one embodiment of the method, the protective colloid is chosen from among the}maltodextrins, polyvinylpyrrolidone, xanthan gum, carboxymethylcellulose, pectin,_{starches and its derivatives, guar gum, acacia gum and polyvinyl alcohol (PVA). [0220] According to one embodiment of the method, the protective colloid is chosen from gum}acacia and polyvinyl alcohol (PVA)._{[0221] The first aqueous phase as well as the second aqueous phase in accordance with the invention can comprise from 0 to 5% by mass, relative to the total mass of said aqueous phase, of at least a colloid in accordance with the invention, preferably from 0.05 to 2.5% by mass, and more particularly from 0.1 to 2% by mass relative to the total mass of said aqueous phase. [0222] According to one embodiment, the second aqueous phase does not comprise a solvent.}additional other than those previously described, which allows the use of the least possible additives and the most ecological microspheres possible._{[0223] According to one embodiment, the temperature of the second phase is from 10°C to 5°C. lower than the crystallization temperature of said at least one wax and/or said at least one}cosmetic ingredient._{[0224] The stirring speed in step III depends on the quantity of emulsion to be produced and the}desired particle size and the person skilled in the art will be able to determine it based on his general knowledge. Thus, for batches of approximately 1 to 5 kg, the speed is 1500-2000 rpm for a particle size d(50) of 15-20 µm and 5000-6000 rpm for a particle size d(50) of less than 10 µm._{[0225] According to one embodiment of the method, the stirring speed in step III is 1500 – 6,000 rpm, preferably between 2,000 and 5,000 rpm with the IKA® Eurostar mixer}Power control-visc 6000 equipped with a 45 mm diameter deflocculating blade._{[0226] The “drip” transfer rate in step IV of the process is a function of the quantity}of dispersion to be prepared and the person skilled in the art will be able to determine it based on his general knowledge. Thus, for batches of approximately 0.5 to 1 kg of second aqueous phase, the flow rate is between 10 and 40 ml/min and for batches of approximately 50 kg, the flow rate can go up to 10 liters/min._{[0227] Microspheres obtained by the process [0228] The present invention also relates to microspheres obtained according to the method}previously described._{[0229] Suspension of microspheres according to the invention [0230] The production process described above allows the production of an aqueous suspension}comprising at least 25% by mass of microspheres relative to the total mass of the_{suspension. Preferably, the suspension comprises at least 30% by mass of microspheres,}relative to the total mass of the suspension._{[0231] This is achieved by adding at least one part and at most two parts of the emulsion}obtained in step (III) in a part of the second aqueous phase._{[0232] The present invention also relates to a microsphere suspension obtained according to the}process previously described._{[0233] Powder [0234] According to one embodiment, the microspheres according to the invention are in a dry form,}such as a powder._{[0235] According to one embodiment, the dry form is obtained by lyophilization or atomization, preferentially by lyophilization of the suspension of microspheres previously obtained. [0236] According to one embodiment, the dry form comprises the microspheres according to the invention in a content of at least 90% by mass relative to the total mass of the dry form.}[0237]_{[0238] The powder may comprise, in addition to the microspheres, one or more selected ingredients}among preservatives, stabilizers, buffers, anti-caking agents, flow agents and their mixtures._{[0239] Cosmetic composition [0240] The present application also relates to a cosmetic composition comprising}cosmetic ingredient microspheres according to the present invention, and a physiologically acceptable medium._{[0241] The physiologically acceptable medium is preferably cosmetically or}dermatologically acceptable. A “physiologically acceptable” or “cosmetically acceptable” or “dermatologically acceptable” medium means any medium that does not present harmful side effects and in particular does not produce redness, inflammation, heating, tightness or stinging that would be unacceptable to a user of cosmetic or dermatological products. The medium is thus compatible with human keratin materials._{[0242] Keratinous materials [0243] The keratin materials will be the skin, the mucous membranes, the scalp, the hair, the}hair system, eyelashes, eyebrows, lips, nails._{[0244] Galenic [0245] Advantageously, the microspheres according to the invention, in the form of a suspension or in}dry form can be used in any type of galenic such as galenics_{liquids or solid galenics. [0246] According to one embodiment, the cosmetic composition is in liquid or}solid, preferably solid._{[0247] As an illustration, for liquid galenics, we will cite aqueous solutions,}hydroalcoholic or oily, emulsions, microemulsions, nanoemulsions, suspensions, lotions, creams, aqueous or hydroalcoholic gels, foams, serums,_{aerosol solutions or dispersions, lipid vesicle dispersions. [0248] As an illustration, for solid galenics, we will cite soaps, syndets, shampoos}solids or solid shower gels made preferably from soap or syndet, the Balms, solid or semi-solid sticks, powders, or powders to be reconstituted to form a cosmetic product (whether the powder is in any form such as granules, microbeads, glitter, etc.)._{[0249] According to a preferred embodiment, the cosmetic composition is in the form of}solid shampoo, preferably obtained from syndet._{[0250] These solid galenics can be obtained by all methods known to man.}of the trade for the preparation of solid galenics. It has in fact been advantageously demonstrated that the microspheres according to the invention (with or without waxes) could be incorporated into_{solid galenics without modification of the process for obtaining the solid galenic or deterioration}microspheres._{[0251] Typically, solid galenics can be obtained by extrusion or by casting at} hot. _{[0252] Advantageously, the spherical shape and the volume granulometry d(50) between 0.5 and 20 µm, preferably between 1 and 10µm, preferably between 2 and 8µm allow for adhesion easy mechanics on hair from 30 µm (fine hair) to 70 µm (thick hair) and this as illustrated in}Figure 1. The particle size/hair size ratio acts in favor of the adhesion of the particle to the hair. This adhesion allows for better resistance to the leaching of particles when rinsing a shampoo, for example._{[0253] Thus, the composition according to the present invention is preferably useful for formulating hygiene and care products for the scalp and/or hair as well as coloring products}of the scalp and/or hair_{[0254] Hygiene, care and coloring of the scalp and/or hair [0255] Compositions suitable for hygiene, care and coloring of the scalp and/or hair can come in any form appropriate in the field, such as soaps, syndets, liquid or solid shampoos, dry shampoos, masks}hair, syndets, serums, mousses, balms, creams, sprays, conditioners, detanglers, hair creams, lotions, gels, serums, sprays,_{rinse aids and coloring products, powder shampoos to reconstitute. [0256] According to one embodiment, the composition is in the form of a solid shampoo,}preferentially obtained from syndet._{[0257] According to one embodiment, the solid shampoo is obtained by extrusion. [0258] According to one embodiment, the cosmetic ingredient is a surfactant, preferably a cationic surfactant, preferably chosen from glycine betaine derivatives such as above defined, preferably the company's CosmeGreen™ ES1822+ and CosmeGreen™ MB1618}SurfactGreen._{[0259] According to one embodiment, the cosmetic ingredient is not water-soluble. [0260] The invention also relates to a care and/or hygiene method or a method of coloring of keratin materials, in particular the scalp and/or hair, consisting of apply to said keratin materials, in particular the scalp and/or hair, a cosmetic composition comprising the microspheres of active ingredients according to the invention. [0261] Face and body: Hygiene [0262] The composition according to the invention is also useful for formulating hygiene products.}face and body. For example, galenic forms suitable for hygiene and/or care of the face and/or body include serums, roll-ons, liquid or solid soaps, shower gels, syndets, gels, micellar waters, lotions, scrubs, deodorants, creams, skin masks, shaving creams, foams, aftershave products,_{milks, balms, grain scrubs, cleansing creams, milks, facial cleansers under}milk form, aqueous serums, shaving powders, shower gels, powder to reconstitute.._{[0263] According to one embodiment, the cosmetic ingredient is not water-soluble. [0264] The invention also relates to a cleaning and/or make-up removal method or a}process for caring for keratin materials, in particular the skin, consisting of applying to said keratin materials, in particular the skin, a cosmetic composition comprising the microspheres of active ingredients according to the invention._{[0265] Face and body: Makeup [0266] The composition according to the invention is also useful for formulating makeup products.}of the face and body. Among the galenic forms suitable for the_{face and body makeup: foundation powders, loose powders, bronzing powders,}compact foundations, eyeshadows, eye shadows, lip balms, body balms, lipsticks, eye pencils, eyebrow pencils, lip pencils, nail polishes._{[0267] According to one embodiment, the cosmetic ingredient is a wax. [0268] According to one embodiment, the composition is in powder form, such as a powder}loose, compact, compressed or a powder to be reconstituted._{[0269] The invention also relates to a process for making up keratin materials, in}in particular the skin, consisting of applying to said keratin materials, in particular the skin,_{a cosmetic composition comprising the microspheres of active ingredients according to the invention. [0270] The cosmetic composition according to the invention may also comprise, in addition to}microspheres according to the invention, at least one additive customary in the field, such as for example at least one compound chosen from an emollient or humectant agent, a gelling and/or thickening agent, a surfactant, an oil, an active agent, a colorant, a preservative, an antioxidant agent, an active agent, an organic or inorganic powder, a sunscreen and a perfume. _{[0271] A person skilled in the art is able to choose, from among all of these possible additives,}both the nature and the quantity of those which will be added to the composition, so that it retains all of its properties._{[0272] Process for obtaining solid shampoo [0273] The present invention also relates to a process for obtaining a solid shampoo, including: - the mixture of raw syndet and microspheres according to the invention to obtain a paste, - extrusion of the previously obtained paste, - the cutting and/or molding of said dough if necessary. [0274] According to one embodiment, the crude syndet in the mixing step is in the form of shavings. In addition to the raw syndet and the microspheres according to the invention, any type of ingredient}conventionally used in the manufacture of a solid shampoo by extrusion can be integrated into the mixture. Examples include conditioners, surfactants, perfumes, colorants, etc._{[0275] Use [0276] The inventors have demonstrated that the formulation of cosmetic ingredient in the form of microspheres according to the invention make it possible to improve the performance of the cosmetic ingredient, both}during its application as well as for its cosmetic properties._{[0277] Indeed, the inventors compared a solid shampoo prepared from syndet and}comprising a cosmetic ingredient as commercially available (i.e., without being formulated_{in the form of microspheres) to a solid shampoo prepared from syndet and comprising the}microspheres of cosmetic ingredient according to the invention. It has been demonstrated during a consumer test that shaping the cosmetic ingredient in the form of microspheres improves its properties during application (improved foam production, sensoriality during application and improved rinsing) but also from a cosmetic point of view (improved detangling, hair protection, cleaning, shine, styling, softness, character)._{[0278] More particularly, it has been demonstrated that: - The production of foam is improved; - The sensoriality during application is improved: (the product is considered more pleasant to use, easier to apply and as providing a finer foam); - Rinsing is improved; - Detangling is improved; - The product does not dry out the hair; - Hair protection is improved; - Cleaning is improved; - The shine is improved; - Styling is improved; - Softness is improved; - the nourishing character is improved. [0279] The inventors have also demonstrated the benefits provided by the formulation of an active ingredient moisturizer in the form of microspheres according to the invention compared to the active ingredient alone. At concentration}equal (0.3%), the active ingredient in microspheres has a significantly higher moisturizing efficacy. It is particularly notable that even by tripling the concentration of the active ingredient alone (1%), it does not consistently achieve the efficacy of the active ingredient formulated according to the invention. These_{results confirm the substantial improvement in moisturizing efficacy provided by the technology}microspheres according to the invention._{[0280] Thus, the present invention also relates to the use of the microspheres according to the invention to improve the cosmetic performance of said cosmetic ingredient. [0281] According to one embodiment, the cosmetic performances are chosen from obtaining}foam, sensoriality, rinsing, detangling, hair protection, cleansing, shine, styling, softness, nourishing character, hydration of keratin materials, preferably of the skin._{[0282] According to one embodiment, the cosmetic performances are chosen from obtaining}foam, sensoriality, rinsing, detangling, hair protection, cleansing, shine, styling, softness, nourishing character._{[0283] According to one embodiment, the cosmetic performance is hydration. [0284] The invention is illustrated in a non-limiting manner by the examples below.}Examples_{Example 1: Microspheres according to the invention comprising at least one cosmetic ingredient}having a melting point above 30°C and not being a wax and at least a wax._{[0285] The processes as described in Example 1 make it possible to obtain microspheres comprising}at least one cosmetic ingredient having a melting point above 30°C and not being a_{wax and at least one wax. [0286] Example 1A: Microspheres according to the invention comprising a cationic surfactant (CosmeGreen ES1822+) and a wax (hydrogenated olive oil) [0287] The ingredients and proportions used in the process are described in the table below. [0288] [Table 2]}Emuls 1_eraion p_{aqueous phase Fatty phase 2nd aqueous phase}90% Demineralized water_{95% Phytowax 10L40 (oil}95% Demineralized water 10% INAVEA_{hydrogenated olive oil) ***} 5% INAVEA ORIGINAL (acacia gum)** 5% CosmeGreen ES1822+* ORIGINAL (acacia gum)** *_{Surfactant; **Protective colloid; ***Wax [0289] CosmeGreen ES1822+*is a glycine betaine derivative. [0290] The volume ratio between the fatty phase and the first aqueous phase in the emulsion is}40/60._{[0291] The volume ratio between the emulsion and the second aqueous phase in the dispersion is 60/40. [0292] The “drop by drop” emulsion transfer rate is 300ml/min. [0293] The diameter D(50) of the microspheres produced is 15µm. [0294] Material used [0295] [Table 3] Reactors Agitators Speed Reactor 1: 2.5 L stainless steel IKA® Eurostar mixer 1300 rpm}Power control-visc 6000, deflocculating blade D 45 mm R_{reactor 2: 2.5 L stainless steel RS Lab mixer, 4-blade propeller}800-1000 rpm inclined blades_{[0296] Protocol [0297] The microsphere suspension is manufactured according to the following successive steps 1-6: [0298] 1/ Loading reactor 1 with the ingredients of the first aqueous phase indicated above-}above at a temperature of 65°C._{[0299] 2/ Preparation of the fatty phase by melting the wax at 70°C and then adding the CosmeGreen™ ES1822+. [0300] 3/ Addition of the previously melted fatty phase in said reactor 1, for 1 minute, stirring in an IKA Eurostar stirrer at 1300 rpm, then for 7 minutes. [0301] 4/ Production of the second aqueous phase in reactor 2 with the indicated ingredients}above, stirring with an RS Lab stirrer, at speed 800 rpm._{[0302] 5/ Addition drop by drop of the emulsion present in reactor 1 into reactor 2 under high speed 1000 rpm. [0303] 6/ Obtaining a suspension of microspheres of size 15 µm, to which 1% of}Euxyl K712 preservative by mass relative to the total mass of the suspension._{[0304] This process allows the following microsphere suspensions to be obtained: [0305] Suspension 1 [0306] [Table 4] Trade name INCI % - Aqua 68.61 Phytowax 10L40 Hydrogenated Olive Oil Decyl Ester 23.72 INAVEA Original Acacia Senegal Gum 5.42} Behenyl Alcohol CosmeGreen ES1822+ Arachidyl Alcohol 1.25 Betaine Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate _{[0307] The microspheres are suspended in an aqueous medium, the aqueous medium comprising in addition a preservative (Euxyl K 712). The aqueous suspension contains 30.39% by mass of}microspheres relative to the total mass of the suspension._{[0308] Each microsphere comprises: - 78.06% by mass of wax, relative to the total mass of the microsphere, the wax being a wax hydrogenated olive; - 4.11% by mass of the cationic surfactant CosmeGreen ES1822+, relative to the total mass of the microsphere; - 17.83% by mass of the colloid, relative to the total mass of the microsphere, the colloid being the}residual colloid used in the process._{[0309] Another suspension was obtained by the process described above, the fatty phase being}composed of an equal mixture of hydrogenated olive oil and hydrogenated castor oil. The suspension is described below._{[0310] Suspension 2 [0311] [Table 5] Trade name INCI % - Aqua 68.61 Phytowax 18L57 Hydrogenated Olive Oil Stearyl Ester 11.86 Phytowax 22L73 Hydrogenated Castor Oil Behenyl Ester 11.86 INAVEA Original Acacia Senegal Gum 5.42} Behenyl Alcohol CosmeGreen ES1822+ Arachidyl Alcohol 1.25 Betaine Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate _{[0312] The microspheres are suspended in an aqueous medium, the aqueous medium comprising}in addition a preservative (Euxyl K 712). The aqueous suspension comprises 30.39% by mass of microspheres relative to the total mass of the suspension. _{[0313] Each microsphere comprises: - 78.06% by mass of waxes, relative to the total mass of the microsphere, the waxes being a mixture of hydrogenated olive oil and hydrogenated castor oil; - 4.11% by mass of the cationic surfactant CosmeGreen ES1822+, relative to the total mass of the microsphere; - 17.83% by mass of the colloid, relative to the total mass of the microsphere, the colloid being the}residual colloid used in the process._{[0314] Example 1B: Microspheres according to the invention comprising a cationic surfactant (VarisoftEQ 65 MB) and a wax (hydrogenated olive oil) [0315] The ingredients and proportions used in the process are described in the table below. [0316] [Table 6]}Emulsi 1_erawe p_{aqueous phase Fatty phase 2nd aqueous phase 100% Demineralized Water 70% Phytowax Olive 18L57}95% Demineralized water (hydrogenated olive oil) *** 5% INAVEA 30% VarisoftEQ 65 MB* ORIGINAL (acacia gum)** *_{Surfactant (cosmetic ingredient) **Protective colloid; *** Wax [0317] VarisoftEQ 65 MB is a cationic surfactant. [0318] The volume ratio between the fatty phase and the first aqueous phase in the emulsion is}30/70._{[0319] The volume ratio between the emulsion and the second aqueous phase in the dispersion is 65/35. [0320] The “drop by drop” emulsion transfer rate is 13ml/min. [0321] The diameter D(50) of the microspheres produced is 1.34µm. [0322] Material used [0323] [Table 7] Reactors Agitators Speed Reactor 1: 2.5 L stainless steel IKA® Eurostar mixer}6000 rpm Power control-visc 6000, deflocculating blade D 45 mm R_{reactor 2: 2.5 L stainless steel RS Lab mixer, 4,800 rpm propeller}inclined blades_{[0324] Protocol [0325] The microsphere suspension is manufactured according to the following successive steps 1-6: [0326] 1/ Loading reactor 1 with the ingredients of the first aqueous phase indicated below}above at a temperature of 80°C._{[0327] 2/ Preparation of the fatty phase by melting the wax at 88°C and then adding the}VarisoftEQ 65 MB. _{[0328] 3/ Addition of the previously melted fatty phase in said reactor 1, for 1 minute, with stirring in an IKA Eurostar stirrer at 4000 rpm, then for 10 minutes at 6000 rpm. [0329] 4/ Production of the second aqueous phase in reactor 2 with the indicated ingredients}above, stirring with an RS Lab stirrer, at speed 800 rpm._{[0330] 5/ Addition drop by drop of the emulsion present in reactor 1 into reactor 2 under}high speed 800 rpm._{[0331] 6/ Obtaining a suspension of microspheres of size 1.34 µm, to which 1% of}Euxyl K712 preservative by mass relative to the total mass of the suspension._{[0332] This process allows the following microsphere suspensions to be obtained [0333] Suspension 3 [0334] [Table 8] Trade name INCI % - Aqua 77.3 Phytowax Olive 18L57 Hydrogenated Olive Oil Decyl Ester 14 INAVEA Original Acacia Senegal Gum 1.7} VarisoftEQ 65 MB DistearoylethylDimoniumChloride; CetearylAlcohol 6 Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate _{[0335] The microspheres are suspended in an aqueous medium, the aqueous medium comprising in addition a preservative (Euxyl K 712). The aqueous suspension contains 21.7% by mass of}microspheres relative to the total mass of the suspension._{[0336] Each microsphere comprises: - 64.5% by mass of wax, relative to the total mass of the microsphere, the wax being a wax hydrogenated olive; - 27.6% by mass of the cationic surfactant VarisoftEQ 65 MB relative to the total mass of the microsphere; - 7.8% by mass of the colloid, relative to the total mass of the microsphere, the colloid being the}residual colloid used in the process._{[0337] Example 1C: Microspheres according to the invention comprising an oil rich in omega 3}(linseed oil) and a wax (high melting point (approximately 73°C) C18 fatty acid monobasic triglyceride)_{[0338] The ingredients and proportions used in the process are described in the table below. [0339] [Table 9] era}Emulsion 1_{aqueous phase Fatty phase 2nd aqueous phase}93% Demineralized water_{60% Dynasan 118}93% Demineralized water 7% INAVEA (Tristearin) *** 7% INAVEA ORIGINAL (acacia gum)**_{39% Oil rich in omega 3*} ORIGINAL (acacia gum)** 1% tocopheryl acetate* *_{Cosmetic ingredient; **Protective colloid; ***Wax [0340] The volume ratio between the fatty phase and the first aqueous phase in the emulsion is}40/60._{[0341] The volume ratio between the emulsion and the second aqueous phase in the dispersion is 70/30. [0342] The “drop by drop” emulsion transfer rate is 38ml/min. [0343] The diameter D(50) of the microspheres produced is 3.4µm. [0344] Material used [0345] [Table 10] Reactors Agitators Speed Reactor 1: 2.5 L stainless steel IKA Ultra-Turrax mixer} 6000 rpm T50, S50N-G45F R rod_{reactor 2: 2.5 L stainless steel RS Lab mixer, 4-blade propeller}500 rpm inclined blades_{[0346] Protocol [0347] The microsphere suspension is manufactured according to the following successive steps 1-6: [0348] 1/ Loading reactor 1 with the ingredients of the first aqueous phase indicated above-}above at a temperature of 80°C._{[0349] 2/ Preparation of the fatty phase by melting the wax at 80°C and then adding oil rich in omega 3 and tocopheryl acetate. [0350] 3/ Addition of the previously melted fatty phase in said reactor 1, for 5 minutes, under agitation in an Ultra-Turrax IKA T50 agitator, S50N-G45F shaft at 6000 rpm. [0351] 4/ Production of the second aqueous phase in reactor 2 with the indicated ingredients}above, under stirring with an RS Lab stirrer, at speed 500 rpm._{[0352] 5/ Addition drop by drop of the emulsion present in reactor 1 into reactor 2 under moderate speed 500 rpm. [0353] 6/ Obtaining a suspension of microspheres of size 3.4 µm, to which 1% of}Euxyl K712 preservative by mass relative to the total mass of the suspension._{[0354] This process allows the following microsphere suspensions to be obtained [0355] Suspension 4 [0356] [Table 11] Trade name INCI % - Aqua 65.84 Dynasan 118 Sadearin 16.63 INAVEA Original Acacia Senegal Gum 5.16 Oil rich in Omega 3 Linseed oil 11.03 Tocopheryl acetate 0.34} Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate _{[0357] The microspheres are suspended in an aqueous medium, the aqueous medium comprising in addition (Tocopheryl acetate). The aqueous suspension contains 33.16% by mass of microspheres}relative to the total mass of the suspension._{[0358] Each microsphere comprises: - 50.2% by mass of wax, relative to the total mass of the microsphere, the wax being a high melting point (approximately 73°C) C18 fatty acid monobasic triglyceride; - 33.3% by mass of an oil rich in omega 3 compared to the total mass of the microsphere; - 15.6% by mass of the colloid, relative to the total mass of the microsphere, the colloid being the}residual colloid used in the process_{- 1% by mass of antioxidant (tocopheryl acetate), relative to the total mass of the microsphere. [0359] Example 1D: Microspheres according to the invention comprising a moisturizing active ingredient Hydrosmart and two waxes (hydrogenated olive oil and hydrogenated castor oil). [0360] The ingredients and proportions used in the process are described in the table below. [0361] [Table 12] e}Emulsion 1_{2nd aqueous phase Fatty phase 2nd aqueous phase}90% Demineralized water_{27.4% Phytowax Olive}99% Demineralized water 10% INAVEA 18L57*** 1% INAVEA ORIGINAL(acacia gum)** 27.4% Phytowax Ricin ORIGINAL(acacia gum)** 22L73*** 4_{0% Hydrosmart* 5.2% Cosmegreen * * Cosmetic ingredient; ** Protective colloid; *** Wax [0362] The volume ratio between the fatty phase and the first aqueous phase in the emulsion is}40/60._{[0363] The volume ratio between the emulsion and the second aqueous phase in the dispersion is 60/40. [0364] The “drop by drop” emulsion transfer rate is 500ml/min. [0365] The diameter D(50) of the microspheres produced is 12.3µm. [0366] Material used [0367] [Table 13] Reactors Agitators Speed Reactor 1: 2.5 L stainless steel IKA® Eurostar mixer}2100 rpm Power control-visc 6000, deflocculating blade D 45 mm R_{reactor 2: 2.5 L stainless steel RS Lab mixer, 4-blade propeller}800-1000 rpm inclined blades_{[0368] Protocol [0369] The microsphere suspension is manufactured according to the following successive steps 1-6: [0370] 1/ Loading of reactor 1 with the ingredients of the first aqueous phase indicated above-}above at a temperature of 80°C._{[0371] 2/ Preparation of the fatty phase by melting the waxes at 85°C and then adding}Hydrosmart and Cosmegreen_{[0372] 3/ Addition of the previously melted fatty phase in said reactor 1, for 1 minute, with stirring in an IKA Eurostar stirrer at 1000 rpm, then for 8 minutes at 2100 rpm. [0373] 4/ Production of the second aqueous phase in reactor 2 with the indicated ingredients}above, stirring with an RS Lab stirrer, at speed 800 rpm._{[0374] 5/ Addition drop by drop of the emulsion present in reactor 1 into reactor 2 under}high speed 1000 rpm._{[0375] 6/ Obtaining a suspension of microspheres of size 12.34 µm, to which 1% is added}of Euxyl K712 preservative by mass relative to the total mass of the suspension._{[0376] This process allows the following microsphere suspensions to be obtained: [0377] Suspension 5 [0378] [Table 14] Trade name INCI % Water 70.16 Phytowax Olive 18L57 Hydrogenated Olive Oil}6.85 P_{Hytowax Castor Oil 22L73}Decyl Ester_{6.85 Hydrosmart 10 Inavea Original Acacia Senegal Gum 3.84} Behenyl Alcohol CosmeGreen ES1822+ CH Arachidyl Alcohol 1.3 Betaine Aqua Euxyl K712 Sodium benzoate 1 Potassium sorbate 100 _{[0379] The microspheres are suspended in an aqueous medium, the aqueous medium comprising in addition a preservative (Euxyl K712). The aqueous suspension contains 28.84% by mass of}microspheres relative to the total mass of the suspension._{[0380] Each microsphere comprises: - 47.50% by mass of wax, relative to the total mass of the microsphere, the wax being a blend of hydrogenated olive oil and hydrogenated castor oil; - 34.67% by mass of hydrosmart compared to the total mass of the microsphere; - 4.52% by mass of cosmegreen compared to the total mass of the microsphere - 13.31% by mass of the colloid, relative to the total mass of the microsphere, the colloid being the}residual colloid used in the process._{[0381] Example 2: Process for obtaining a dispersion of microspheres according to the invention}composed mainly of cosmetic ingredients_{[0382] In these examples, microspheres of cosmetic ingredient were obtained, the microspheres being composed mainly of a cosmetic ingredient which is not a wax. [0383] Example 2A: Process for obtaining a dispersion of microspheres according to the invention composed mainly (at least 90%) of Cosmegreen ES1822+ (cationic surfactant) [0384] The ingredients and proportions used in the process are described in the table below. [0385] [Table 15] 1st}Emulsion p_{aqueous phase Fatty phase 2nd aqueous phase}99% Demineralized Water_{100% CosmeGreen ES1822+* 95% Demineralized water} 1% PVA* 5% INAVEA Buffer solution qs pH 4.3 ORIGINAL (acacia gum)** Buffer solution qs pH 4.3 *_{Surfactant; **Protective colloid; ***Active ingredient [0386] CosmeGreen ES1822+ is a glycine betaine derivative. [0387] The volume ratio between the fatty phase and the first aqueous phase in the emulsion is}30:70._{[0388] The volume ratio between the emulsion and the second aqueous phase in the dispersion is 65:35. [0389] The emulsion transfer rate in "drop by drop" is 400ml/min. The dry extract of the dispersion obtained in example 2 is 21.5%. [0390] The diameter D(50) of the produced microspheres is 3.1µm. The D(10) is 0.6µm and the}D(90) of 8.5µm._{[0391] Material used [0392] [Table 16] Reactors Agitators Speed Reactor 1: 5 L stainless steel IKA® Eurostar mixer 600 rpm}Power control-visc 6000, deflocculating blade D 45 mm R_{reactor 2: 5 L stainless steel Ultra-Turrax IKA T50, rod}10000 rpm S50N-G45F_{[0393] Protocol [0394] The microsphere suspension is manufactured according to the following successive steps 1-6: [0395] 1/ Loading of reactor 1 with the ingredients of the first aqueous phase indicated above-}above at a temperature of 85°C._{[0396] 2/ Preparation of the fatty phase by melting the CosmeGreen™ ES1822+ at 90°C. [0397] 3/ Addition of the previously melted fatty phase in said reactor 1, for 1 minute with stirring in an Ultra-Turrax IKA T50 at 3000 rpm, then for 5 minutes at 10000 rpm. [0398] 4/ Production of the second aqueous phase in reactor 2 with the indicated ingredients}above, stirring with an IKA Eurostar stirrer, at speed 600 rpm._{[0399] 5/ Addition drop by drop of the emulsion present in reactor 1 into reactor 2 under}high speed 600rpm._{[0400] 6/ Obtaining a suspension of Cosmegreen microspheres of size 3.1µm as shown below:}described below, to which 1% of Euxyl K712 preservative is added by mass relative to the total mass of the suspension._{[0401] Suspension 6 [0402] [Table 17] Trade name INCI % - Aqua 75.8} Behenyl Alcohol CosmeGreen ES1822+ Arachidyl Alcohol 19.85 Betaine I_{NAVEA Original Acacia Senegal Gum 1.77} Aqua Buffer solution Sodium Lactate 1.15 Lactic acid Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate K_{uraray-Poval 4-88 LV Polyvinyl alcohol 0.43 [0403] The microspheres are suspended in an aqueous medium, the aqueous medium comprising furthermore a preservative (Euxyl K 712) and a buffer solution. The aqueous suspension comprises 22.05% by mass of microspheres relative to the total mass of the suspension 6. [0404] Each microsphere comprises: - 90.02% by mass of the cationic surfactant CosmeGreen ES1822+, relative to the total mass of the microsphere; - 8.03% by mass of the colloid (acacia gum) and 1.95% by mass of the surfactant (PVA), by}relative to the total mass of the microsphere, the colloid and surfactant being the residual colloid and surfactant used in the process._{[0405] Example 2B: Process for obtaining a dispersion of microspheres according to the invention composed mainly (100%) of Emulsense™ HC (cationic surfactant) [0406] The ingredients and proportions used in the process are described in the table below. [0407] [Table 18] er}Emulsion 1_{e aqueous phase Fatty phase 2nd aqueous phase}99% Demineralized Water_{100% Emulsense™ HC*** 95% Demineralized water} 1% PVA* 5% INAVEA ORIGINAL (acacia gum)** *_{Surfactant; **Protective colloid; ***Active ingredient [0408] The volume ratio between the fatty phase and the first aqueous phase in the emulsion is}30/70._{[0409] The volume ratio between the emulsion and the second aqueous phase in the dispersion is 65/35. [0410] The emulsion transfer rate in "drop by drop" is 33ml/min. The dry extract of the}dispersion obtained in example 2B is 21.4%._{[0411] The diameter D(50) of the microspheres produced is 11.25 µm. [0412] Material used [0413] [Table 19] Reactors Agitators Speed Reactor 1: 5 L stainless steel IKA® Eurostar mixer}4000 rpm Power control-visc 6000, deflocculating blade D 45 mm R_{2:5 L stainless steel reactor IKA® Eurostar mixer 1800 rpm}Power control-visc 6000, pale d_{40 mm deflocculator [0414] Protocol [0415] The microsphere suspension is manufactured according to the following successive steps 1-6: [0416] 1/ Loading reactor 1 with the ingredients of the first aqueous phase indicated below}above at a temperature of 80°C._{[0417] 2/ Preparation of the fatty phase by melting the Emulsense™ HC at 80°C. [0418] 3/ Addition of the previously melted fatty phase in said reactor 1, for 1 minute stirred in an IKA Eurostar stirrer at 3000 rpm, then for 10 minutes at 4000 rpm. [0419] 4/ Production of the second aqueous phase in reactor 2 with the indicated ingredients}above, stirring with an IKA Eurostar stirrer, at speed 600 rpm._{[0420] 5/ Addition drop by drop of the emulsion present in reactor 1 into reactor 2 under}high speed 1800rpm, at a flow rate of 33ml/min._{[0421] 6/ Obtaining a suspension of Emulsense™ HC microspheres of size (D50) 11.25µm}as described below, to which 1% of Euxyl K712 preservative is added by mass relative to the total mass of the suspension._{[0422] Suspension 7 [0423] [Table 20] Trade name INCI % - Aqua 76.85 Emulsense™ HC BrassicylIsoleucinateEsylate(and) Brassica}20.00 Alcohol I_{NAVEA Original Acacia Senegal Gum 1.70} Aqua Euxyl K 712 Sodium benzoate 1.00 Potassium sorbate K_{uraray-Poval 4-88 LV Polyvinyl alcohol 0.45 [0424] The microspheres are suspended in an aqueous medium, the aqueous medium comprising furthermore a preservative (Euxyl K 712). The aqueous suspension comprises 20.00% by mass of microspheres relative to the total mass of the suspension 3. [0425] Each microsphere comprises: - 90.3% by mass of the cationic surfactant Emulsense™ HC, relative to the total mass of the microsphere; - 7.7% by mass of the colloid (acacia gum) and 2% by mass of the surfactant (PVA), compared to}the total mass of the microsphere, the colloid and the surfactant being the residual colloid and surfactant used in the process._{Example 3: Process for obtaining a dispersion of microspheres according to the invention}mainly comprising wax._{[0426] In this example, microspheres of cosmetic ingredient were obtained, the microspheres being composed mainly of a mixture of waxes (hydrogenated olive oil and}hydrogenated castor oil)._{[0427] The reagents used in the process are as described below. [0428] [Table 21] e}Emulsion 1_{2nd aqueous phase Fatty phase 2nd aqueous phase}91.6% Demineralized water_{50% Phytowax18L57 50%***}98.03% Demineralized water 7.2% Maltodextrin** Phytowax22L73 *** 1.3% Amphisol K* 1.2% Amphisol K* 0.67% Euxyl K712 *_{Surfactant; **Protective colloid; ***Waxes: [0429] The volume ratio between the fatty phase and the first aqueous phase in the emulsion is}50:50._{[0430] The volume ratio between the emulsion and the second aqueous phase in the dispersion is 50:50. [0431] The “drop by drop” emulsion transfer rate is 300ml/min. [0432] The diameter D(50) of the microspheres produced is 13.4µm. [0433] Material used [0434] [Table 22] Reactor Stirrer Speed Reactor 1: 5 L stainless steel IKA® Eurostar mixer 2000 rpm}Power control-visc 6000, deflocculating blade D 45 mm R_{2:5 L stainless steel reactor RS Lab mixer, blade of}1300 rpm cross-type mixture_{[0435] Protocol [0436] The microsphere suspension is manufactured according to the following successive steps 1-6: [0437] 1/ Loading reactor 1 with the ingredients of the first aqueous phase indicated below}above at a temperature of 90°C._{[0438] 2/ Preparation of the fatty phase by melting the waxes at 80°C. [0439] 3/ Addition of the previously melted fatty phase in said reactor 1, for 1 minute with stirring in an IKA® Eurostar stirrer at 2000 rpm, for 4 minutes. [0440] 4/ Production of the second aqueous phase in reactor 2 with the indicated ingredients above, stirring with an RS Lab stirrer, at speed 600 rpm, at 90°C then cool to}4°C._{[0441] 5/ Addition drop by drop of the emulsion present in reactor 1 into reactor 2 under}high speed 1300rpm._{[0442] 6/ Obtaining a suspension of microspheres comprising mainly waxes. [0443] The microsphere suspension was then lyophilized, in a pilot lyophilizer of}CRYOTEC benchtop, for obtaining microsphere powder. Those skilled in the art will know _{determine the cycle required for drying the suspensions obtained. The composition of the powder of microspheres is described below: [0444] Dry form, microsphere powder 1 [0445] [Table 23] Phytowax 18L57 Hydrogenated Olive Oil Stearyl Ester 44.57 Phytowax 22L73 Hydrogenated Castor Oil Behenyl Ester 44.57 Glucidex 6D Maltodextrin 6.46 Amphisol K Potassium Cetyl Phosphate 3.40} Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate _{[0446] The microspheres are in powder form, the powder comprising 92.54% by mass of}microspheres relative to the total mass of the powder 2. The powder includes, in addition to the microspheres, Glucidex 6D which stabilizes the powder and prevents the particles from clumping together during drying and a preservative (Euxyl K 712)._{[0447] Each microsphere comprises: - 96.33% by mass of wax, relative to the total mass of the microsphere, the wax being a mixture of hydrogenated olive oil and hydrogenated castor oil, - 3.67% by mass of surfactant (Amphisol K), relative to the total mass of the microsphere, the}surfactant being the residual surfactant used in the process._{[0448] Example 4: Microspheres in powder form. [0449] Other dry forms have been obtained by a lyophilization process and are described below.} After. _{[0450] Dry form, microsphere powder 2 [0451] [Table 24] Trade name INCI % Phytowax 10L40 Hydrogenated Olive Oil Decyl Ester 89.14 Glucidex 6D Maltodextrin 6.46 Amphisol K Potassium Cetyl Phosphate 3.40} Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate _{[0452] The microspheres are in powder form, the powder comprising 92.54% by mass of microspheres relative to the total mass of the powder 1. The powder comprises, in addition to the}microspheres, Glucidex 6D which stabilizes the powder and prevents the particles from clumping together when drying and a preservative (Euxyl K 712). _{[0453] Each microsphere comprises: - 96.33% by mass of wax, relative to the total mass of the microsphere, the wax being an oil}hydrogenated olive oil_{- 3.67% by mass of surfactant (Amphisol K), relative to the total mass of the microsphere, the}surfactant being the residual surfactant used in the process._{[0454] Dry form, microsphere powder 3 [0455] [Table 25] Trade name INCI %} Behenyl Alcohol CosmeGreen ES1822+ Arachidyl Alcohol 85.80 Betaine I_{NAVEA Original Acacia Senegal Gum 7.21} Sodium Lactate Buffer 2.87 Lactic acid K_{uraray-Poval 4-88 LV Polyvinyl alcohol 1.91} Aqua Euxyl K712 Sodium benzoate 2.12 Potassium sorbate _{[0456] The microspheres are in powder form, the powder comprising 94.92% by mass of}microspheres relative to the total mass of the powder 3. The powder includes, in addition to the microspheres, a buffer and a preservative._{[0457] Each microsphere comprises: - 90.39% by mass of the surfactant CosmeGreen ES1822+, relative to the total mass of the microsphere; - 7.59% by mass of the colloid (acacia gum) and 2.01% by mass of the surfactant (PVA), compared}to the total mass of the microsphere, the colloid and surfactant being the residual colloid and surfactant used in the process._{Example 5: Solid shampoo comprising a surfactant in the form of microspheres [0458] A solid shampoo obtained from syndet comprising as surfactant a derivative of glycine betaine, and more specifically CosmeGreen ES1822+ CH was manufactured, the surfactant CosmeGreen ES1822+ CH being in the form of a suspension of microspheres according to the invention and as obtained by the process described in Example 2. The suspension of microspheres used in this example is suspension 6 as obtained by the process described in example 2 and}more particularly described in Table 17._{[0459] CosmeGreen ES1822+ CH in its commercially available form is presented in}the shape of pellets of a few millimeters. _{[0460] The raw syndet comes in the form of chips which are introduced into the mixer.}These shavings are the product of a saponification or neutralization reaction._{[0461] The suspension of microspheres according to the invention is then added to the mixer, the perfume and possibly a coloring. [0462] The mixer is a double Z-arm mixer which allows mechanical work at}room temperature._{[0463] The mixture obtained is homogeneous and granular. [0464] The next step is a refining step during which the previously obtained mixture}is passed through a refiner which will compact it into lumps._{[0465] Refining is carried out by a twin-screw machine, equipped with cooling for}keep the product at a constant temperature, approximately at room temperature._{[0466] The lumps obtained in the previous step are ground by multi-cylinder calenders.}The spacing of the grinders is between 0 and 5 mm, and the person skilled in the art knows how to adapt the spacing according to the product to be obtained._{[0467] At this stage, the preparation is homogeneous with a soft texture. [0468] The next step is an extrusion step, through a plodder which will compact the}soap by forcing it through a die, being pushed by an endless screw._{[0469] The extruder is a duplex extruder, i.e. 2 stages with 2 screws, is equipped with a vacuum bell. The extruder is also cooled by a liquid refrigerant circuit between 5}and 15°C. At its end is the extrusion cone (and the die), the only part of the machine that is heated, between 50 and 70°C, to ensure the sliding and smoothing of the soap through the die._{[0470] Thus extruded, the syndet is cut into plugs by a guillotine cutter. The shape of the}die is defined by the shape of the mold._{[0471] The bung is shaped by the press, using multi-cavity molds. The presses}are in fact equipped with multi-cavity molds which are cooled (up to 20°C)._{[0472] After the operation of shaping the bond, the surplus called crashes, is removed}automatically to be recycled_{Example 6: Comparison of the properties of a solid shampoo including the surfactant}CosmeGreen ES1822+ as commercially available (i.e., without being formulated in the form of microspheres) to those of a solid shampoo including the surfactant_{CosmeGreen ES1822+ in the form of microspheres according to the invention [0473] The properties of a solid shampoo obtained from syndet and comprising the surfactant CosmeGreen ES1822+ as commercially available (i.e., not formulated as}microspheres) were compared with that of a solid shampoo obtained from syndet and_{comprising the surfactant CosmeGreen ES1822+ in the form of microspheres according to the invention and obtained according to the process as described in example 2. Solid shampoos (commercial form}of Cosmegreen and Cosmegreen microspheres) were obtained according to the method described in_{Example 5. The microsphere suspension used in this example is suspension 6 such}as obtained by the process described in Example 2 and more particularly described in Table 17. In its current commercial form, Cosmegreen has beneficial properties for hair and skin. These properties are mainly attributed to its mechanical effects._{[0474] Despite undeniable properties that contribute to the quality of cosmetic products intended for hair and skin, the formulation of Cosmegreen in different preparations}cosmetics (liquid or solid) in its current commercial form raises various_{issues: [0475] For use in liquid galenics (such as shampoos and conditioners),}Cosmegreen surfactant must be melted at 80°C and mixed with fatty phases at the same temperature, and/or in glycerin to be either emulsified or co-solubilized. The pH must also be adjusted._{[0476] To be used in hot-cast solid galenics, we find the same}temperature constraints regarding mixing with other solids. Crystallization must be controlled to avoid phase separations between the constituents._{[0477] As for its use in extruded solid galenics, its use is limited, because the}extrusion temperature is lower than the melting temperature of Cosmegreen. Its dispersion_{in the solid phase is then poor, and its performance as a product conditioner}finished are poor, if not non-existent._{[0478] The surfactant microspheres according to the invention offer the possibility of formulating the surfactant in these various galenic forms without heating constraints. [0479] Solid shampoo comprising the surfactant CosmeGreen ES1822+ such as}commercially available (i.e., not formulated as microspheres)_{[0480] When manufacturing solid shampoo from syndet, the extrusion temperature is of approximately 65°C. This extrusion temperature is lower than the melting temperature of 80°C of the}Cosmegreen. Thus, Cosmegreen in its commercial form will not be mixed in a_{homogeneous but will be dispersed in fairly large packets (a few dozen to hundreds of µm) in the mixture allowing the solid shampoo to be obtained, as visible in Figure}2. These aggregates and non-homogeneity in the mixture will considerably reduce the effectiveness of the surfactant._{[0481] Indeed, when applying the shampoo with water, the constituents classically present in a shampoo dissolve in water, playing their role one by one. Cosmegreen itself will be deposited by friction on the surface of the hair in clumps. However, the size of the Cosmegreen clumps}is significantly higher than that of a hair causing them to be eliminated during rinsing. This reduces_{significantly the presence of Cosmegreen on the surface of the hair which weakens its}performance, which is partly linked to the quantity deposited. _{[0482] Solid shampoo comprising the surfactant Cosmegreen in the form of microspheres according to}the invention_{[0483] The microsphere format according to the invention allows direct and homogeneous incorporation of the}Cosmegreen surfactant in the constituents of the mixture for extrusion, and allows the obtaining_{a solid shampoo with Cosmegreen evenly distributed throughout. [0484] Advantageously, the extrusion process does not alter the microspheres which remain intact.}after solubilization of the shampoo in water (Figure 3)._{[0485] When used by the consumer, Cosmegreen is deposited by friction on the hair}and adheres. The application is uniform on the surface of the hair (Figure 4), and resists rinsing with water_{(Figure 5). [0486] Indeed, the spherical shape and the d(50) granulometry of 3.1µm allows for grip easy mechanics on hair from 30 µm (fine hair) to 70 µm (thick hair) and this as illustrated in}Figure 1. Thus, the particle size/hair size ratio acts in favor of the adhesion of the particle to the hair. This adhesion allows for better resistance to the leaching of the particles when rinsing a shampoo, for example._{[0487] Thus, it appears clearly that Cosmegreen in the form of microspheres according to the invention}can easily be incorporated into a solid dosage form such as a solid shampoo, without the need to heat them, unlike its commercial form, while preserving its properties in terms of effectiveness and stability. Advantageously, the microspheres are not altered by the extrusion process._{[0488] Example 7: Comparison of the performance of the Cosmegreen surfactant such as}commercially available (i.e., without being formulated in the form of microspheres) to those of the Cosmegreen surfactant in the form of microspheres according to the invention_{[0489] The objective of the test was to evaluate the acceptability, tolerance and efficacy of three shampoos}solids A, B and C. The formulas of these three compositions are reproduced below._{[0490] The methodology is reproduced below. [0491] [Table 26] Panel description Panel of 24 people}17 women 7 men A_{average age: 44 years old between 28 and 69 years old Inclusion criteria Healthy volunteers}Female or male volunteers Volunteers aged 18 to 75 D_{21-day test duration Instructions for use Apply at least 3 times a week to the scalp and hair: wet the}solid shampoo and hair then rub, massage thoroughly and rinse _{[0492] Product A is a solid shampoo, obtained from syndet and comprising Cosmegreen}as commercially available (i.e., not formulated as microspheres)._{[0493] [Table 27] Ingredient % by mass relative to the total mass of the}product T_{ENSIANOL SCI 96 Cosmegreen ES 1822+ 2 Glycerin 4811 RSPO MB 2 [0494] Glycerin was introduced into the formulation because Cosmegreen ES1822+ does not mix}not properly alone. Glycerin improves workability and allows Cosmegreen ES1822+ to be incorporated into the syndet._{[0495] Product B is a solid shampoo obtained from syndet and not comprising}Cosmegreen._{[0496] [Table 28] Ingredient % by mass relative to the total mass of the}product T_{ENSIANOL SCI 100 [0497] Product C is a solid shampoo obtained from syndet and comprising Cosmegreen in the form of microspheres according to the invention. The microspheres are in the form of a suspension}aqueous. The aqueous suspension of microspheres used in this example is suspension 6 as obtained by the process described in example 2 and more particularly described in table 17._{[0498] [Table 29] Ingredient % by mass relative to the total mass of the}product T_{ENSIANOL SCI 90 Aqueous suspension of 6 microspheres of}10 Cosmegreen ES 1822+_{[0499] Solid shampoos A, B and C were obtained according to the process as described in the example}5._{[0500] For each of these compositions, the following criteria were evaluated: [0501] [Table 30] Rating Criteria Tolerance Mention a sign of intolerance or a}feeling of discomfort such as tingling, redness, tightness, etc. S_{overall satisfaction The overall judgment of the product should be categorized as “very good”, “good”, “bad”, “very bad”.} The smell is pleasant. The product lathers well upon application. The product is easy to apply. The product facilitates detangling. The product produces a fine lather. The product is easy to rinse. The volunteers were asked to indicate, for example, that the product does not dry out the hair._{each of these statements if they were:}The product protects the hair_{"TOTALLY AGREE"}The product gently cleanses the hair_{" ALL RIGHT "}The hair is shiny_{"NOT COMPLETELY AGREE"}Hair is easy to style_{"NO AGREEMENT"}The hair is less oily The scalp seems balanced A weighted average of the scores given was then calculated. The product prevents my hair from getting greasy. The hair is soft The product does not weigh down the hair The hair is supple The hair is light The hair is nourished_{[0502] Product A results [0503] [Table 31] Rating Criteria Tolerance No signs of intolerance were observed}No discomfort was reported S_{overall satisfaction The overall judgment of the product:}Very good 12.5% B_{on: 3.5% Bad: 42% Very bad: 8% [0504] [Table 20]}NOT ALL NOT ALL AVERAGE D_{'AGREEMENT AGREEMENT}OK OK WEIGHTED L_{The smell is pleasant 4.55 18.18 27.27 50.00 22.73}The product foams well at_{application 58.33 12.50 8.33 20.83 70.83}The product is pleasant to u_{use 39.13 30.43 21.74 8.70 69.57}The product is easy to apply_{41.67 33.33 20.83 4.17 75.00}The product facilitates detangling_{22.22 16.67 33.33 27.78 38.89}The product provides a m_{fine ousse 29.17 45.83 20.83 4.17 75.00 The product is easy to rinse 47.83 43.48 8.70 0.00 91.30}The product does not dry out the_{hair 12.50 54.17 20.83 12.50 66.67}The product protects the hair_{13.64 36.36 45.45 4.55 50.00}The product cleans the c_{smooth hair 30.43 43.48 26.09 0.00 73.91 Hair is shiny 8.70 56.52 26.09 8.70 65.22} Hair is easy to c_{oiffer 25.00 37.50 25.00 12.50 62.50 Hair is less oily 20.83 50.00 25.00 4.17 70.83}The scalp appears to be_{balanced 8.33 62.50 25.00 4.17 70.83}The product prevents my c_{want to regrease 17.39 34.78 30.43 17.39 52.17 Hair is soft 25.00 37.50 20.83 16.67 62.50}The product does not weigh down the c_{hair 29.17 37.50 25.00 8.33 66.67 Hair is soft 29.17 45.83 12.50 12.50 75.00 Hair is light 33.33 41.67 16.67 8.33 75.00 Hair is nourished 17.39 43.48 21.74 17.39 60.87 [0505] Product A Conclusions: [0506] [Table 32]}Conclusion L_{The product presented: Very good dermatological tolerance}Good cosmetic acceptability Significant items (>74%): •The product is easy to apply •The product provides a fine foam •The product is easy to rinse •The hair is supple •The hair is light_{[0507] The acceptability of product A is shared. Product A is considered 50% good. (sum of “very good” and “good”) and is considered 50% bad (sum of “bad” and “very bad”). [0508] 29% of volunteers would buy the product, compared to 71% who would not. [0509] Product B results [0510] [Table 33] Rating Criteria Tolerance No signs of intolerance were observed}No discomfort was reported S_{overall satisfaction The overall judgment of the product: Very good 8% Good: 54% Bad: 34% Very bad: 4% [0511] [Table 34]}NOT ALL NOT ALL AVERAGE D_{'AGREEMENT AGREEMENT}OK OK WEIGHTED L_{The smell is pleasant 8.33 20.83 41.67 29.17 29.17} The product foams well_{application 29.17 62.50 4.17 4.17 91.67}The product is pleasant to use_{25.00 54.17 16.67 4.17 79.17}The product is easy to apply_{29.17 54.17 12.50 4.17 83.33}The product facilitates detangling_{23.81 47.62 14.29 14.29 71.43}The product provides a m_{fine ousse 25.00 58.33 12.50 4.17 83.33 The product is easy to rinse 33.33 66.67 0.00 0.00 100.00}The product does not dry out the_{hair 30.43 43.48 21.74 4.35 73.91}The product protects the hair_{21.74 39.13 34.78 4.35 60.87}The product cleans the c_{smooth hair 33.33 58.33 8.33 0.00 91.67 Hair is shiny 25.00 50.00 25.00 0.00 75.00}Hair is easy to style_{26.09 43.48 26.09 4.35 69.57}Hair is less oily_{18.18 54.55 22.73 4.55 72.73}The scalp appears to be_{balanced 16.67 54.17 25.00 4.17 70.83}The product prevents my c_{want to regrease 13.04 47.83 30.43 8.70 60.87 Hair is soft 25.00 45.83 29.17 0.00 70.83}The product does not weigh down the c_{hair 25.00 45.83 25.00 4.17 70.83 Hair is soft 25.00 50.00 20.83 4.17 75.00 Hair is light 25.00 50.00 20.83 4.17 75.00 Hair is nourished 13.04 52.17 26.09 8.70 65.22 [0512] Conclusions product B: [0513] [Table 35]}Conclusion L_{The product presented: Very good dermatological tolerance}Good cosmetic acceptability Significant items (>74%): •The product foams well upon application •The product is pleasant to use •The product is easy to apply •The product provides a fine foam •The product is easy to rinse •The product gently cleanses the hair •The hair is shiny •The hair is supple •The hair is light_{[0514] Product B is considered 62% good (sum of “very good” and “good”) and is considered bad at 38% (sum of “bad” and “very bad”). [0515] 37% of volunteers would buy the product, compared to 63% who would not. [0516] Product results C [0517] [Table 36] Rating Criteria Tolerance No signs of intolerance were observed}1 feeling of discomfort was reported S_{overall satisfaction The overall judgment of the product: Very good 42% Good: 37% Bad: 17% Very bad: 4% [0518] [Table 37]}ALL TO_{OKAY NOT ALL}FACT DONE NOT AVERAGE AGREE AGREE AGREE WEIGHTED L_{The smell is pleasant 4.17 16.67 50.00 29.17 20.83}The product foams well at_{application 39.13 43.48 13.04 4.35 82.61}The product is pleasant to use_{43.48 39.13 13.04 4.35 82.61}The product is easy to apply_{50.00 45.83 0.00 4.17 95.83}The product facilitates detangling_{19.05 57.14 19.05 4.76 76.19}The product provides a m_{fine ousse 41.67 45.83 8.33 4.17 87.50 The product is easy to rinse 54.17 45.83 0.00 0.00 100.00}The product does not dry out the_{hair 33.33 45.83 12.50 8.33 79.17}The product protects the hair_{17.39 60.87 17.39 4.35 78.26}The product cleans the c_{smooth hair 29.17 62.50 4.17 4.17 91.67 Hair is shiny 25.00 50.00 20.83 4.17 75.00}Hair is easy to style_{45.45 31.82 18.18 4.55 77.27 Hair is less oily 16.67 45.83 33.33 4.17 62.50}The scalp appears to be_{balanced 20.83 50.00 20.83 8.33 70.83}The product prevents my c_{want to regrease 8.70 47.83 30.43 13.04 56.52 Hair is soft 29.17 54.17 16.67 0.00 83.33}The product does not weigh down the c_{hair 21.74 52.17 21.74 4.35 73.91 Hair is soft 20.83 54.17 20.83 4.17 75.00 Hair is light 20.83 45.83 29.17 4.17 66.67 Hair is nourished 17.39 60.87 13.04 8.70 78.26 [0519] Product C is considered 79% good (sum of “very good” and “good”) and is considered bad at 21% (sum of “bad” and “very bad”). [0520] 67% of volunteers would buy the product, compared to 33% who would not. [0521] Table [38]}Conclusion L_{The product presented: Very good dermatological tolerance}Good cosmetic acceptability Significant items (>74%): •The product foams well upon application •The product is pleasant to use •The product is easy to apply •The product facilitates detangling •The product produces a fine foam •The product is easy to rinse •The product does not dry out the hair •The product protects the hair •The product gently cleanses the hair •The hair is shiny •The hair is easy to style •The hair is soft •The hair is supple •The hair is nourished_{[0522] Thus, product C has the best performance, compared to products A}and B._{[0523] As demonstrated by the consumer test, the microspheres according to the invention allow}advantageously to improve the qualities and properties of the surfactant._{[0524] Indeed, and by comparison with solid shampoo including Cosmegreen such as}commercially available (i.e., without being formulated in the form of microspheres), it has been demonstrated in the present consumer test that the formulation of Cosmegreen in the form of_{microspheres make it possible to improve the properties of the surfactant, both for its application and for its cosmetic properties, as summarized in Table 28 below. [0525] Improved application and sensoriality during application have been}observed:_{- Improvement in obtaining foam (weighted average of 70.83 for product A at criterion “the product foams well upon application” vs 82.61 for product C); - Improvement of sensoriality during application (weighted averages, respectively, of 69, 57, 75 and 75 for the criteria “the product is pleasant to use”, “the product is easy to apply” and “the product provides a fine foam” for product A vs 82.61, 95.83 and 87.50 for product C); - Improvement during rinsing (weighted average of 91.30 for product A in the criterion “the product foams well on application” vs 100 for product C). [0526] Improvement of cosmetic properties: - Improved detangling (weighted average of 38.89 for product A vs 76.19 for the product C); - The product does not dry out the hair (weighted average of 66.67 for product A vs 79.17 for product C); - Improved hair protection (weighted average of 50.00 for product A vs 78.26 for product C); - Improved cleaning (weighted average of 73.91 for product A vs 91.67 for the}product C)_{- Improved shine (weighted average of 65.22 for product A vs. 75 for product C); - Improved styling (weighted average of 91.30 for product A vs. 77.27 for product}C)_{- Improved softness (weighted average of 91.30 for product A vs. 83.33 for product C); - Improvement of the nourishing character (weighted average of 60.87 for product A vs 78.26}for product C)._{[0527] [Table 39] Product A Product B Product C}The product is easy to The product is easy to The product is easy to apply apply apply L_{The product is easy to rinse The product is easy to rinse The product is easy to rinse}The product provides a fine lather The product provides a fine lather The product provides a fine lather The product lathers well upon application The product gently cleanses the hair The product gently cleanses the hair The product is pleasant to use The product is pleasant to use The hair is supple_{The hair is supple The hair is supple The hair is shiny The hair is shiny}Hair is easy to style Hair is soft Hair is nourished The product makes detangling easier The product does not dry out the hair The product protects the hair_{[0528] Example 7: Galenic compositions [0529] Aqueous serums [0530] Two aqueous serums, comprising microspheres of the cationic surfactant CosmeGreen}ES1822+ were prepared, one comprising the microspheres of the cationic surfactant CosmeGreen ES1822+ in the form of suspension 1, the other in the form of suspension 2_{as previously described in Tables 4 and 5. The composition of the aqueous sera is described in the table below: [0531] [Table 40] Phase Composition % At Aqua QSP Xanthan gum 1.45% Glycerin 0.48% Fragrance 0.30%}B_{Potassium Sorbate 0.30% Sodium Benzoate 0.15%}C_{Microspheres (in the form of suspension 1 or 2) 3.00% [0532] The galenic is prepared according to the following steps: phase A is prepared by}solubilization of xanthan gum in water, with stirring at room temperature, then glycerin and perfume are added. The preservatives of phase B, then the microspheres (phase C) are also incorporated with stirring._{[0533] Liquid shampoos [0534] Three liquid shampoos, comprising three different aqueous suspensions of microspheres of the cationic surfactant CosmeGreen ES1822+ were prepared (suspensions 1, 2 and 6 as described above in Tables 4, 5 and 8). The composition of the liquid shampoos is described in the table below: [0535] [Table 41] Composition % Aqua 82.36% Sodium cocoyl isethionate 6.97% Decyl Glucoside 4.00% Microspheres (in the form of the suspension 1, 2 or 6) 3.00% Cocamidopropyl betaine 1.87% Sodium Benzoate 1.00% Cyamopsis tetragonoloba (guar) gum 0.50% Guar hydroxypropyltrimonium chloride 0.30% Citric acid Qsp pH 5.5 [0536] The galenic is prepared according to the following steps: phase A is prepared by}solubilization of the gum in water, with stirring using a deflocculating blade at temperature_{ambient. Cocamidopropyl betaine is gradually added to phase A, then stirred for}10 minutes. Then the decyl glucoside is gradually added to the mixture and stirred for 10_{minutes. Finally, the Sodium Cocoyl Isethionate is also added gradually and the mixture is}left stirring for an additional 15 minutes. Phase B is prepared by dissolving the gum in water, while stirring using a deflocculating paddle at room temperature. The Phases A and B are mixed, then the microspheres (phase C) and preservative (phase D) are also incorporated while stirring. Finally, the pH is adjusted to 5.5 using citric acid._{[0537] [Table 42] Steps Composition %} Preparation _{Demineralized water 41.18%}phase A_{Cyamopsis tetragonoloba (guar) gum 0.50% Cocamidopropyl betaine 1.87%}Addition of phase A_{Decyl Glucoside 4.00% Sodium cocoyl isethionate 6.97%} Preparation _{Demineralized water 41.18%}phase B_{Guar hydrxoypropyltrimonium chloride 0.30%}Phase C_{Microspheres (in the form of the} suspension 1, 2 or 6) 3.00% S_{Sodium Benzoate 1.00%}Phase D C_{itric acid Qsp pH 5.5 [0538] Shower gel to reconstitute [0539] Three shower gels to be reconstituted, comprising microspheres in dry form, have been prepared (Powders 1, 2, 3 as described above in Tables 11, 12 and 13). The composition of the shower gels to be reconstituted are described in the table below: [0540] [Table 43] Composition % Sodium Cocoyl Isethionate 78.84% Instant Fragrance Powder Perfume 8.76% Microspheres in dry form (Powder 1, 2 or 3) 7.90% Xanthan gum 2.50% Sodium Benzoate 2.00% [0541] Shower gel powder is obtained by mixing all the constituents. The powder}The resulting solution should be reconstituted at 10% in lukewarm water. Shake and let stand for 24 hours before use._{[0542] Shaving powder [0543] Two shaving powders, comprising microspheres in dry form, were prepared (Powders 2 and 3 as described above in Tables 12 and 13). The composition of the powders shaving is described in the table below: [0544] [Table 44] Composition % Xanthan gum (80 mesh) 49% Disodium Lauryl Sulfosuccinate 49% Microspheres in dry form (Powder 2 or 3) 2% [0545] The shaving powder should be placed in the hand. Apply a few drops of water, mix}and apply to the face._{[0546] Shampoo powder to reconstitute [0547] Two powder shampoos to be reconstituted, comprising microspheres in dry form (Powders 2 and 3 as described above in Tables 12 and 13) were prepared. The composition powder shampoos to be reconstituted are described in the table below: [0548] [Table 45] Composition % Sodium Laurylglucosides Hydroxypropylsulfonate 38% Disodium Lauryl Sulfosuccinate 38%}Glucomannan 10% M_{microspheres in dry form (Powder 1 or 3) 10% Instant Fragrance 5% powder perfume [0549] The shampoo powder should be reconstituted at 10% in lukewarm water. Shake and let stand}24 hours before use._{[0550] Compact powder [0551] A compact makeup powder, comprising microspheres in dry form (Powder 2 as described above in Table 12) was prepared. The composition of the powder compact is described in the table below: [0552] [Table 46] Composition % Magnesium stearate 42.375% Sericite 300S 42.375% Pigment Colorona Oriental Beige 5.85% Glycerin 2% Perfume 0.4% Microspheres in dry form (Powder 1) 7% [0553] The powder obtained after mixing the different components is compacted in a}aluminum cup._{[0554] Advantageously, the microspheres according to the invention can be integrated into a}compacted galenic, without loss of their properties. _{Example 8: Evaluation of the moisturizing effect of cosmetic ingredients formulated in the form}of microspheres according to the invention_{[0555] These studies aim to evaluate the moisturizing efficacy and sensory properties of ingredients cosmetic in the form of microspheres according to the invention (example 8A) and to compare the}moisturizing performance of an active ingredient in the form of microspheres according to the invention vs. the non-active ingredient_{formulated in the form of a microsphere (example 8B). [0556] Evaluation methodology [0557] The measurement of skin hydration was carried out by corneometry, a technique which}quantifies skin hydration by measuring its dielectric constant. This method is based on the principle that the higher the skin hydration, the greater the measured conductivity._{[0558] Characteristics of the measurement ^ Corneometry allows an evaluation on a thickness of 15 μm ^ This low measurement depth does not allow a measurement to be taken immediately}after application_{^ Protocol: measurement before daily application, then measurement after 24 hours of application [0559] Application protocol ^ Continuous application of serums throughout the duration of the study (once a day), including}the weekend_{^ Measurements taken daily at approximately constant time, except in exceptional circumstances [0560] Experimental design ^ Panel of 4 volunteers ^ Evaluation of 5 serums containing different ingredients ^ Continuity of measurements on a minimum of 7 applications per serum [0561] Example 8A: Evaluation of the moisturizing effect and sensory properties [0562] The purpose of the study is to determine the moisturizing effectiveness of an active ingredient in the form of}microspheres according to the invention as well as the impact of such an ingredient on the sensory properties of the serum._{[0563] The compositions of sera A and B are as follows: [0564] [Table 47] Serum A: Ingredient % Glycerin 0.5 Euxyl K712 (water, potassium sorbate,}1 sodium benzoate) G_{xanthan gum 1.5 Water 97 [0565] [Table 51] Serum B: Ingredient % Glycerin 0.5} Euxyl K712 (water, potassium sorbate, 1 sodium benzoate) G_{xanthan gum 1.5 CreaskinGlide 3 Water 97}100_{[0566] CreaskinGlide corresponds to suspension 2 described in Table 14, namely microspheres comprising mainly a mixture of hydrogenated olive oil and hydrogenated castor oil:}[Table 48] N_{commercial name INCI % - Aqua 68.61 Phytowax 18L57 Hydrogenated Olive Oil Stearyl Ester 11.86 Phytowax 22L73 Hydrogenated Castor Oil Behenyl Ester 11.86 INAVEA Original Acacia Senegal Gum 5.42} Behenyl Alcohol CosmeGreen ES1822+ Arachidyl Alcohol 1.25 Betaine Aqua Euxyl K 712 Sodium benzoate 1 Potassium sorbate _{[0567] The microspheres are suspended in an aqueous medium, the aqueous medium comprising}furthermore a preservative (Euxyl K 712). The aqueous suspension comprises 30.39% by mass of microspheres relative to the total mass of the suspension._{[0568] Each microsphere comprises: - 78.06% by mass of waxes, relative to the total mass of the microsphere, the waxes being a mixture of hydrogenated olive oil and hydrogenated castor oil; - 4.11% by mass of the cationic surfactant CosmeGreen ES1822+, relative to the total mass of the microsphere; - 17.83% by mass of the colloid, relative to the total mass of the microsphere, the colloid being the}residual colloid used in the process._{[0569] Figure 6 shows a clear comparison between two formulations: ^ Virgin Serum A: CreaskinGlide-free formulation. ^ Serum with ingredient B: formulation comprising the ingredient in the form of microspheres according to the invention, namely CreaskinGlide. [0570] Figure 6 demonstrates that CreaskinGlide microspheres maintain}systematically a higher hydration rate, with values generally oscillating between 6_{and 16, while virgin serum shows more modest values between approximately -1 and 4. [0571] Furthermore, the sensory properties of serum B were compared with those of serum A.}Comparison of sensory properties between the two products shows several differences_{notable. In terms of softness, serum B scores higher (7/10) than serum}virgin (5/10). The stickiness is identical for both products with an average score of 4/10. The_{The most significant difference concerns the mattifying effect, where serum B is excellent with a very high score. high of 8/10, while serum A only gets a low 1/10. Regarding the speed of penetration, Serum B also shows better performance (5/10) compared to virgin serum A (3/10).}Finally, both products have identical ease of spreading with a good score of 7/10._{[0572] The study demonstrates the significant moisturizing efficacy of the serum comprising the ingredient CreaskinGlide in the form of microspheres according to the invention. Beyond performance}hydration, this technology offers two major advantages: -_{Ease of cold formulation: The formulation of waxes in the form of microspheres allows}to incorporate them into an aqueous gel at room temperature, which would have been technically impossible with traditional waxes requiring a heating step._{Preservation and improvement of sensory properties: Despite their incorporation into a}aqueous formula, the waxes in the form of microspheres retain their beneficial sensory characteristics, providing a distinctive texture and feel to the final product._{[0573] Example 8B: Comparison of the performance of the Hydrasmart ingredient as}commercially available (i.e., without being formulated in the form of microspheres) to those in the form of microspheres according to the invention_{[0574] The results of this study will make it possible to determine whether the method according to the invention improves}significantly the moisturizing properties of the ingredient compared to its standard commercial form._{[0575] The compositions of sera C, D and E are as follows: [0576] [Table 49] Serum C: Ingredient % Glycerin 0.5} Euxyl K712 (water, potassium sorbate, 1 sodium benzoate) G_{xanthan gum 1.5 Hydrosmart Microspheres (3% of}3 m_{microspheres = 0.3% active) Water 94}100 _{[0577] [Table 50] Serum D: Ingredient % Glycerin 0.5} Euxyl K712 (water, potassium sorbate, 1 sodium benzoate) G_{xanthan gum 1.5 Hydrosmart 0.3 Water 96.7}100_{[0578] Table 51] Serum E: Ingredient % Glycerin 0.5} Euxyl K712 (water, potassium sorbate, 1 sodium benzoate) G_{xanthan gum 1.5 Hydrosmart 1 Water 96}100_{[0579] Hydrosmart microspheres have the following composition and were obtained by the process}as described in Example 1D._{[0580] [Table 52] Ingredient % Water 70.16 Phytowax Olive 18L57 6.85 Phytowax Castor Oil 22L73 6.85 Hydrosmart 10}Inavea Original 3.84 C_{osmeGreen ES1822+ CH 1.3 Euxyl K712 1}100_{[0581] The Hydrosmart asset is composed as follows: [0582] [Table 53] Ingredient % Sunflower oil 36 Shea Butter 33 Aloe Vera 30 Oil Macerate Tocopherol 1}100_{[0583] Hydrosmart is therefore a mixture of oil and butter, and more particularly a mixture}sunflower oil, shea butter and an oily macerate of Aloe Vera._{[0584] Figure 7 shows two separate graphs (A and B) that clearly demonstrate the advantage Hydrosmart microspheres according to the invention compared to the active ingredient alone: [0585] Figure 7A - Comparison at equal concentration (0.3%) [0586] The active ingredient in the form of microspheres shows a moisturizing effectiveness significantly superior to}the active ingredient alone at the same concentration._{[0587] The active ingredient in the form of microspheres maintains positive hydration values (between +1 and}+9) over the study period._{[0588] The asset alone shows fluctuating but generally inferior performances, with}often negative values (between -3 and +2)._{[0589] The peak of efficacy observed at the third application for the active ingredient in the form of microspheres}(+9) is particularly significant._{[0590] Figure 7B - Comparison with tripled concentration of the active ingredient alone [0591] Even with a tripled concentration (1% vs 0.3%), the active ingredient alone fails to match}systematically the effectiveness of the active ingredient in the form of microspheres._{[0592] Significant instability in the moisturizing efficacy of the active ingredient alone is observed, even at}high concentration._{[0593] The drop in effectiveness observed in application 6 for the active ingredient alone (-10) is particularly}revealing this instability._{[0594] The active ingredient in the form of microspheres has a more stable efficacy curve and}overall superior._{[0595] Conclusion [0596] These results demonstrate two major advantages of microsphere technology according to}the invention:_{[0597] Higher efficacy at equal concentration: At identical concentration (0.3%), the active ingredient under}microsphere form provides significantly greater hydration than the active ingredient alone._{[0598] Saving active ingredient: The need to use three times more active ingredient alone (1%) for}attempting to achieve an efficiency comparable to that obtained with the active ingredient in the form of microspheres (0.3%) demonstrates a substantial gain in efficiency thanks to this technology._{[0599] Performance stability: The formulation in the form of microspheres allows for a}more consistent and predictable delivery of the active, unlike the active alone which has significant variations in effectiveness._{[0600] This study provides convincing evidence of significant improvement in efficacy}moisturizing provided by the microsphere technology according to the invention, while allowing a substantial reduction in the quantity of active ingredient required.

Claims

Claims _{[Claim 1] Microspheres of cosmetic ingredient, with a volume diameter d(50) of} between 0.5 and 20 µm, preferably between 1 and 10 µm, and more preferably between 2 and 8 µm, _{the cosmetic ingredient having a melting point above 30°C, and in which: - when the cosmetic ingredient is other than a wax, the latter represents at least 80% by mass} of said microspheres, and _{- when the cosmetic ingredient is a wax, the latter represents at least 95% by mass of said} microspheres. _{[Claim 2] Microspheres, with a volume diameter d(50) of between 0.5 and 20 µm, preferably between 1 and 10 µm, and preferably between 2 and 8 µm, said microspheres} comprising at least one ingredient and at least one wax, said cosmetic ingredient having a melting point above 30°C and being different from a wax. _{[Claim 3] Microspheres according to claim 1 or 2, characterized in that, when} the cosmetic ingredient is different from a wax, the cosmetic ingredient is chosen from _{surfactants, butters, oils, and mixtures thereof, preferably surfactants and mixtures} of at least one butter and at least one oil. _{[Claim 4] Microspheres according to claim 3, characterized in that the surfactant is} an anionic or cationic surfactant, preferably cationic, and preferably chosen from glycine betaine derivatives, Cetrimonium chloride, Behenoyl PG-Trimonium chloride, Polyglyceryl-10 Stearate, Distearoylethyl Hydroxyethylmonium Methosulfate, Cetearyl Alcohol, _{Distearoylethyl Dimonium Chloride, Behentrimonium Methosulfate, Distearoylethyl Dimonium Chloride Cetearyl Alcohol, BrassicylIsoleucinateEsylate(and) Brassica Alcohol and mixtures thereof,} and in that the butters are chosen from shea butter, mango butter, cocoa butter, cupuaçu butter, pracaxi butter, murumuru butter, Shorea _{robusta butter (Sal Butter) and their mixtures. [Claim 5] Microspheres according to claim 4, characterized in that the cosmetic ingredient is chosen from glycine betaine derivatives, preferably the glycine betaine derivatives} are glycine betaine ester or amide salts, preferably glycine betaine ester or amide salts comprising from 14 to 24 carbon atoms, and preferably the glycine betaine derivatives are derivatives of formula (I) [Chem 1] Xn-[(CH3)3N+-CH2-COZ-R]n where: Z denotes an oxygen atom or an -NH group, R is a linear or branched, saturated or unsaturated alkyl group comprising from 14 to 24 carbon atoms, preferably, the radical R is chosen from myristyl (C14:0), cetyl (C16:0), palmitoleyl groups (C16:1), stearyl (C18:0), oleyl (C18:1), linoleyl (C18:2), linolenyl (C18:3), arachidyl (C20:0), arachidonyl (C20:4), behenyl (C22:0), 2-hexyldecyl, 2-octyldodecyl and 2-decyltetradecyl, X is an organic or inorganic anion. and n is 1 or 2. _{[Claim 6] Microspheres according to claim 1 or 2, characterized in that the cosmetic ingredient} is a wax, preferably chosen from hydrogenated castor oil, 2,3-di(octadecanoyloxy)propyloctadecenoate, hydrogenated olive oil, hydrogenated palm oil, shellac, 1,3-di(tetradecanoyloxy)propan-2-yl, carnauba wax, candelilla wax, beeswax, Glyceryl Stearate SE, Glyceryl Stearate, rice wax, hydrogenated coconut oil, macadamia wax, sumac wax, sumac berry wax, hydrogenated jojoba oil, hydrogenated sunflower oil, sunflower wax, orange peel wax, mimosa wax, _{wax of jasmine, Damask rose wax, Myrica berry wax, green tea leaf wax, lanolin wax and mixtures thereof. [Claim 7] A method of manufacturing the microspheres according to any one of claims 1 to 6, characterized in that it comprises the following steps:} (I) Heating a fatty phase comprising (i) at least one wax and/or (ii) at least one cosmetic ingredient having a melting point above 30°C and not being a wax, to a reaction temperature above the melting temperature of said at least one wax and/or _{said at least one cosmetic ingredient;} (II) Heating a first aqueous phase comprising at least one water-soluble surfactant and at least one protective colloid, to said reaction temperature implemented in step (I), with mechanical stirring; (III) Incorporation of said fatty phase into said first aqueous phase while maintaining the reaction temperature, with mechanical stirring, so as to form a stable oil-in-water emulsion; (IV) Addition dropwise, with mechanical stirring, of said emulsion previously formed into a second aqueous phase comprising at least one water-soluble surfactant and/or at least one protective colloid, the temperature of said second phase being lower than the _{melting temperature of said wax and/or said cosmetic ingredient. [Claim 8] Aqueous suspension of microspheres of cosmetic ingredient according to any one} of claims 1 to 6. _{[Claim 9] Microspheres, and preferably aqueous suspension of microspheres} of cosmetic ingredient, capable of being obtained by the manufacturing process according to claim 7. _{[Claim 10] Cosmetic composition comprising, in a physiologically acceptable manner,} microspheres of cosmetic ingredient according to any one of claims 1 to 6. _{[Claim 11] Cosmetic composition according to claim 10, characterized in that it} is in liquid or solid form, preferably solid. _{[Claim 12] Cosmetic composition according to claim 10 or 11, characterized in that} it is in the form of a solid shampoo. _{[Claim 13] Cosmetic composition according to claim 12, characterized in that} the cosmetic ingredient is a surfactant, preferably a cationic surfactant, and preferably among glycine betaine derivatives. _{[Claim 14] Use of the cosmetic ingredient microspheres according to any one} of claims 1 to 6, to improve the cosmetic performances of said cosmetic ingredient. _{[Claim 15] Use according to claim 14, characterized in that the cosmetic performances} are chosen from obtaining foam, sensoriality, rinsing, detangling, hair protection, cleansing, shine, styling, softness, nourishing character, hydration of keratin materials, preferably of the skin.