Solid composition comprising at least one cavity comprising at least one aqueous and / or oily gel phase

Abstract

Solid composition comprising at least one cavity comprising at least one aqueous and / or oily gel phase. The present invention relates to a solid composition comprising at least one cavity such that the composition has a porosity greater than or equal to 20% by volume relative to the total volume of the solid composition, wherein the solid composition comprises an oily phase comprising at least one lipophilic gelling agent or a phase derived from a saponification reaction, and at least one cavity comprises at least one aqueous and / or oily gel phase, preferably aqueous. Figure for the abstract: none

Description

Title of the invention: Solid composition comprising at least one cavity comprising at least one aqueous and / or oily gelled phase

[0001] The invention relates to a solid composition comprising at least one cavity comprising at least one aqueous and / or fatty gelled phase.

[0002] Today, cleaning or cosmetic compositions are presented in liquid or solid form (for example sticks, compacted or loose powders, (or wipes) to be dispersed in water.

[0003] However, none of these solutions is entirely satisfactory. For example: • Liquid products rely on distribution channels that are not ecologically relevant, as they are mostly composed of water and therefore have large volumes and weights. • Solid cleaning compositions generally have insufficient foaming power, especially compared to liquid compositions. Furthermore, upon use, that is, after contact with an aqueous phase, the surface of solid compositions such as soaps often evolves into a gel-cream texture, usually sticky, which the user finds unpleasant. This drawback can even lead the user to discard the solid composition, which is obviously questionable from an economic and environmental perspective. For dispersible powders, hydration often leads to the formation of aggregates that reduce the desired performance. Finally, for pads, generally based on polyvinyl alcohol (PVA or PVOH), these are falsely ecological solutions because, when dissolved in water, PVA pollutes groundwater. In addition, PVA generally imparts a sticky and unpleasant texture.

[0004] Some of these drawbacks argue in favor of solid compositions in single-dose form. However, it is observed that their size and volume are generally dictated by the user's need for easy handling and are usually greater than those required to achieve the desired technical effect. A portion of these single-dose solid compositions is, in fact, unnecessary, and therefore a source of waste and pollution.

[0005] The Applicant has overcome these drawbacks by means of solid compositions having cavity(ies), as described in patent applications filed under Nos. FR2203881, FR2203882 and FR2206461. According to a particular embodiment, these solid compositions may further comprise an aqueous phase dispersed in the solid composition, preferably in encapsulated form.

[0006] Such solid compositions, however, have limitations in terms of aqueous phase content. Furthermore, it is not always easy to achieve sufficient shear force to ensure satisfactory rupture, or at least spreading, when the aqueous phase is in capsule form. In parallel, optimizing the performance of solid compositions in terms of comfort and sensory experience during application remains a constant objective.

[0007] The inventors have found that it is possible to overcome the aforementioned disadvantages by means of a solid composition according to the invention, without prejudice to a good grip by the user. Composition

[0008] The invention relates to a solid composition comprising at least one cavity such that the composition comprises a porosity greater than or equal to 20%, preferably greater than or equal to 30%, better greater than or equal to 40%, in particular greater than or equal to 50%, or even greater than or equal to 60%, in particular greater than or equal to 70%, and most particularly greater than or equal to 80%, by volume relative to the total volume of the solid composition, wherein the solid composition comprises a fatty phase comprising at least one lipophilic gelling agent or a phase derived from a saponification reaction, at least one cavity comprises at least one aqueous and / or fatty gelled phase, preferably aqueous.

[0009] Such an embodiment is advantageous in that it allows for the application of high quantities in the gel phase, particularly the aqueous phase, compared to the solid compositions developed by the Applicant and mentioned above. This gives said compositions even improved performance in terms of sensory appeal and ease of application, and even efficacy, without compromising their mechanical strength.

[0010] On the contrary, and unexpectedly, the Applicant observed that the presence of the aqueous and / or oily gel phase within all or part of the cavities increases the mechanical resistance of solid composition, without prejudice to the kinetics of transformation between the original solid state and the liquid state.

[0011] The invention is therefore based on a subtle compromise between (i) mechanical resistance, (ii) kinetics of the transformative effect, namely the ability of the solid composition, under shear and / or in the presence of water, to pass rapidly from the original solid state to a liquid state, for example of the gel or cream type and (iii) satisfactory sensory and comfort during application.

[0012] In the presence of an aqueous gel phase, the gelled state prevents the transformation effect from occurring. Therefore, the presence of the aqueous gel phase does not detrimental to maintaining the solid state of the composition according to the invention before its use, and thus before its application to the surface to be treated.

[0013] Even more unexpectedly, the Applicant observed that a composition according to the invention, when it includes a sufficient quantity in aqueous gel phase, makes it possible to do without the addition of water before, during or after application to the surface to be treated, which allows for a new technique and water savings.

[0014] Finally, in the case where the solid composition is dedicated to cleaning, in particular as a household product and / or as laundry detergent, or of a keratinous material, the Applicant has observed that it generates quantities of foam greater than those obtained with the solid compositions of the prior art, including those described in FR2203881, FR2203882 and FR2206461, in particular when the gelled phase is an aqueous gelled phase.

[0015] Unless otherwise indicated, in all that follows, it is assumed that we are at ambient temperature (for example T=25°C ± 2°C) and atmospheric pressure (760 mm of Hg, i.e. 1.013.105 Pa or 1013 mbar).

[0016] For the purposes of this invention, "solid" means a composition which, at room temperature and atmospheric pressure, is not prone to collapse under its own weight. Advantageously, it means any composition having a compressive strength greater than or equal to 20 g, preferably greater than or equal to 50 g, and even better greater than or equal to 100 g, at room temperature (20-25°C), after penetration of the composition's matrix to a thickness of 1 mm by a cylindrical probe of revolution having a diameter of 0.8 cm at a speed of 0.5 mm / s and removal of said probe from the composition's matrix at a speed of 0.5 mm / s; the compressive strength being measured with an "LFRA Texture Analyzer" type analyzer marketed by STEVENS / MECHTRIC.

[0017] A composition according to the invention is not in the form of a paste. However, at the time of its manufacture, particularly when it uses an extrusion process as described later, the composition according to the invention may be in the form of a paste.

[0018] A composition according to the invention is not a powdered composition, and is therefore not in the form of a powder, in particular in the form of a loose or compacted powder. Finally, a composition according to the invention is also not a porous solid resulting from the agglomeration of powders.

[0019] According to a first embodiment, a composition according to the invention is not an aerated composition, and is therefore not a foam. According to a second embodiment, a composition according to the invention may be an aerated composition, and therefore may be in the form of a foam.

[0020] Advantageously, a solid composition according to the invention is not made up of a network of fibers. A composition according to the invention does not comprise (or rely on) a network of fibers. not on a) water-soluble solid support, for example hydrogel type, in particular starch-based, possibly destructured, and / or poloxamer 407.

[0021] Advantageously, a solid composition according to the invention is not in the form of a mask.

[0022] By "porosity", in the sense of the present invention, we mean the set of voids in a solid body (or material), these voids being able to be filled by the aqueous and / or oily gel phase or fluids, in particular water, when the solid composition is brought into the presence of an aqueous solution, for example water such as tap water, shower or bath water.

[0023] For the purposes of this invention, "cavity" means an empty space within a solid body that communicates directly with the external environment, such as the cavities illustrated in Figures 1 and 4. A cavity may therefore be referred to interchangeably as an "orifice," "pore," or "hole." Advantageously, the cavity(ies) is / are through-hole(s), meaning that the cavity is an empty space within a solid body that communicates directly with the external environment on both sides of the solid body. In the context of this invention, at least one cavity may comprise an aqueous and / or oily gel phase, and preferably an aqueous gel phase.

[0024] Thus, the volume of the cavity(ies) in a solid composition according to the invention represents at least 20%, in particular at least 30%, preferably at least 40%, in particular at least 50%, or even at least 60%, in particular at least 70%, and most particularly at least 80%, of the total volume of the solid composition.

[0025] Advantageously, a solid composition according to the invention has a density between 0.2 and 0.8, preferably between 0.3 and 0.7, in particular between 0.4 and 0.6.

[0026] A solid composition according to the invention can have a total volume between 0.125 cm3 and 100 cm3, preferably between 0.250 cm3 and 75 cm3, in particular between 0.5 cm and 50 cm, better between 1 cm and 25 cm, and especially between 2.5 cm and 15 cm3.

[0027] A solid composition according to the invention can have a weight between 0.025 g and 200 g, preferably between 0.20 g and 150 g, in particular between 0.5 g and 100 g, better between 1 g and 75 g, and especially between 2.5 g and 50 g, or even between 5 g and 25 g (“g” corresponding to the unit “gram”).

[0028] According to a first preferred embodiment, a solid composition according to the invention comprises a ratio between the volume of the cavity(ies) and the total volume of the composition of between 0.05 and 0.9, preferably between 0.1 and 0.8, better between 0.2 and 0.7, or even between 0.2 and 0.6, regardless of the presence or absence of the aqueous and / or fatty gelled phase in all or part of the cavities.

[0029] By "total volume" is meant the volume resulting from the sum of the volume of solid and the volume of the cavities, regardless of the presence or absence of aqueous and / or oily gel phase in all or part of the cavities.

[0030] Within the framework of the present invention, the cavities can be described as macroporous, that is to say, pores whose minimum width, or even diameter, is greater than or equal to 1 mm, or even between 1 mm and 2 cm, preferably between 2 mm and 1 cm, in particular between 3 mm and 75 mm, better between 4 mm and 50 mm, and especially between 5 mm and 25 mm.

[0031] The presence of cavities in the contents and / or volumes and / or dimensions considered above makes it possible to obtain solid compositions that require less raw material while still possessing satisfactory gripping properties. A solid composition according to the invention is therefore capable of generating less waste. This weight reduction also has the advantage of allowing for less polluting and less expensive transport. A solid composition according to the invention is therefore advantageous from both an environmental and an economic point of view.

[0032] Furthermore, the inventors observed an unexpected effect in terms of texture and transformative effect when a solid composition according to the invention is applied to the surface to be treated. Indeed, the inventors observed that a solid composition according to the invention, optionally combined with water, produces a greater quantity of foam more rapidly than a solid composition of the same size and volume but without cavities, and even exhibits a faster transformation kinetics from the original solid state to a liquid state, for example, a gel or cream. Without wishing to be bound by any particular theory, the inventors believe that the presence of cavity(ies) within the solid composition increases the surface area in contact with the aqueous phase, particularly water, and thus improves the hydration of said solid composition.

[0033] Thus, the invention even makes it possible to adjust the speed at which the solid composition will foam, or even swell and / or melt, by adjusting the surface area developed at constant volume, by adjusting the percentage of porosity, and more particularly by playing on the shape and / or the number and / or the dimensions of the cavities, or even the number of walls and / or the thickness of the walls of the cavities and / or the volume of the cavities occupied by the aqueous and / or oily gelled phase.

[0034] Advantageously, the size and / or volume of the cavities can be adjusted to store and / or react the correct amount of aqueous and / or oily gel phase and / or water necessary to obtain, when using the solid composition, a final liquid composition with satisfactory / expected, or even optimized and / or homogeneous properties (i.e., between different single doses), for example in terms of viscosity, ease of spreading, amount of foam formed and / or transformative effect.

[0035] Thus, a composition according to the invention even allows access to evanescent compositions, namely those capable of transforming into liquid compositions, in particular in the form of gels or creams, upon application, where appropriate upon contact with an adequate amount of water.

[0036] Finally, the advantages described above in terms of the ability to foam and / or to transform into a liquid composition may also require less water consumption, which constitutes an additional advantage from an ecological and economic point of view.

[0037] The solid character of a composition according to the invention may be based on a phase consisting mainly, or even entirely, of a fatty phase comprising at least one lipophilic gelling agent (also referred to as "solid fatty phase").

[0038] Also, the solid character can be based on a phase derived from a saponification reaction (or "spreading"), and therefore result from the transformation of a fatty phase comprising at least one oil, preferably vegetable, under the action of soda and where appropriate heat (also referred to as "soap phase").

[0039] A composition according to the invention further comprises at least one aqueous and / or fatty gelled phase disposed in at least one cavity of the solid composition.

[0040] For the sake of clarity, throughout the description, the term "solid oily phase" or "soap phase" refers to the phase that constitutes the architecture of the solid composition, and the term "aqueous and / or oily gel phase" refers to the phase injected / localized in all or part of the cavities.

[0041] In the following description, the "solid fat phase" and the "soap phase" may commonly be referred to by the expression "solid phase".

[0042] The fatty gel phase is preferably different from the solid phase, and in particular is different from the solid fatty phase.

[0043] According to a particular embodiment, a composition according to the invention may further comprise an aqueous phase dispersed in the solid oil phase or the soap phase of the solid composition, preferably in encapsulated form, such as for example in the form of matrix spheres (or beads or balls) or of core / shell type (or capsules), for example in the form of capsules as described in WO2010063937.

[0044] This aqueous phase may be identical or different from the gelled phase when represented by a gelled aqueous phase.

[0045] Preferably, a solid composition according to the invention is a single-dose composition.

[0046] Preferably, a solid composition according to the invention is a topical composition.

[0047] A solid composition according to the invention can have any shape, for example a spherical, ellipsoidal, tetrahedral, or polygonal shape, in particular in the shape of a parallelogram, preferably a rectangular parallelogram.

[0048] Preferably, particularly to ensure a good grip, a solid composition according to the invention has:

[0049] - a width, or even a diameter, between 1 and 10 cm, preferably between 2 and 8 cm, especially between 3 and 6 cm, and better between 4 and 5 cm; and / or

[0050] - a height (or thickness) between 0.5 and 5 cm, preferably between 1 and 4 cm, and in particular between 2 and 3 cm. Cavity

[0051] The cavity(s) of a solid composition according to the invention can be of any shape, for example round, oblong, ovoid, triangular, polygonal, in particular hexagonal, honeycomb, or in the form of a tiling (or cutting), for example of the Voronoi diagram type, preferably in the form of a honeycomb, as illustrated in [Fig.1].

[0052] The cavity(s) of a solid composition according to the invention can also represent letters or the logo of a brand or company.

[0053] A solid composition according to the invention comprises one or more cavities, preferably several cavities, identical or different.

[0054] According to a first variant, a composition according to the invention comprises at least one cavity, in particular a through cavity.

[0055] According to a second preferred embodiment, a composition according to the invention comprises several cavities, in particular through-cavities, as illustrated in [Fig. 1] and 4.

[0056] According to a particular embodiment, a composition according to the invention may comprise at least two interconnected cavities. Such an embodiment is advantageous because it promotes capillary action upon contact with water, thereby improving the aforementioned technical effects.

[0057] Advantageously, a solid composition according to the invention comprises several cavities that adopt a honeycomb-shaped structure, as illustrated in [Fig. 1]. This honeycomb shape is particularly advantageous in that it allows the manufacture of solid compositions with a very favorable "volume of the cavity(ies) / total volume of the composition" ratio, in particular greater than or equal to 0.5, or even greater than or equal to 0.75, without prejudice to the grip and robustness of said composition to the mechanical stresses that may be applied to it and / or to storage. In other words, this honeycomb structure offers an excellent compromise between cavity volume and mechanical strength.

[0058] Advantageously, a solid composition according to the invention comprises several cavities that adopt a honeycomb-shaped structure comprising walls having a thickness between 10 pm and 600 pm, preferably between 20 pm and 500 pm, in particular between 30 pm and 400 pm, especially between 50 pm and 300 pm, or even between 100 pm and 200 pm.

[0059] According to a particular embodiment, a composition according to the invention may further comprise additional patterns distinct from the cavities, said patterns being able, for example, to be produced by embossing.

[0060] A person skilled in the art shall take care to choose the possible constituent(s) of a composition according to the invention and / or their quantity in such a way that the advantageous properties of a composition according to the invention are not or are not substantially altered. Likewise, a person skilled in the art shall take care to choose the nature and / or quantity of the component(s) with regard to the solid nature of said composition and / or the manufacturing process. These adjustments fall within the general knowledge of a person skilled in the art.

[0061] According to a particular embodiment, a solid composition according to the invention, especially when it adopts a honeycomb-type configuration as described above, may comprise a plurality of sections, particularly polygonal sections, each section defining a fracturable perimeter allowing the separation of at least one section from the rest of the solid composition. Thus, according to this embodiment, each section of the solid composition corresponds to a single dose. Lipophilic gelling agent

[0062] A composition according to the invention advantageously comprises at least one lipophilic gelling agent, in particular at least one solid fat, preferably selected from at least one wax, at least one pasty fat, at least one butter, and mixtures thereof, for example as described in WO2021234135.

[0063] In particular, the solid fat phase and the fat gelled phase necessarily include at least one such lipophilic gelling agent.

[0064] Advantageously, a lipophilic gelling agent is a heat-sensitive gelling agent, namely one that reacts to heat, and in particular is a gelling agent that is solid at room temperature and liquid at a temperature above 50°C, preferably above 60°C, and more preferably above 70°C. Preferably, a heat-sensitive lipophilic gelling agent according to the invention has a melting point between 50°C and 130°C, and preferably between 60°C and 120°C.

[0065] In particular, a composition according to the invention may comprise from 10% to 90%, preferably from 20% to 80%, in particular from 30% to 70%, and better from 40% to 60%, by weight of lipophilic gelling agent(s) relative to the total weight of the composition (or phase) comprising it / them. Aqueous and / or oily gel phase

[0066] A solid composition according to the invention also comprises an aqueous and / or oily gelled phase in all or part of the cavities, in particular having a viscosity suitable to remain lodged in the cavity(ies) before use.

[0067] The aqueous and / or oily gel phase is solid at room temperature and pressure, meaning that it cannot flow under its own weight. However, it has properties, and in particular a viscosity, suitable for ensuring easy, even comfortable, application to the surface to be treated.

[0068] Advantageously, the aqueous and / or oily gelled phase has a viscosity between 25,000 mPa.s and 100,000 mPa.s, preferably between 30,000 mPa.s and 80,000 mPa.s, and better between 50,000 mPa.s and 60,000 mPa.s, as measured at 25°C according to the method described above.

[0069] The aqueous and / or oily gelled phase therefore comprises at least one hydrophilic and / or lipophilic gelling agent, preferably thermosensitive.

[0070] According to a first variant, the aqueous and / or fatty gelled phase is an aqueous gelled phase, which comprises water and at least one hydrophilic gelling agent, in particular as defined below.

[0071] Besides distilled or deionized water, water suitable for the invention may also be natural spring water or floral water.

[0072] According to a second variant, the aqueous and / or oily gelled phase is an oily gelled phase, which includes at least one lipophilic gelling agent, in particular as defined above, and optionally also at least one oil.

[0073] According to a third variant, the aqueous and / or oily gel phase comprises both an oily gel phase and an aqueous gel phase, preferably in the form of a direct (i.e. oil-in-water) or reverse (water-in-oil) emulsion.

[0074] According to this third variant, the dispersed phase can advantageously take the form of matrix spheres (or beads or balls), as described for example in WO2021234135, or of core / shell type capsules, for example in the form of capsules as described in WO2010063937 or WO2017046305.

[0075] Preferably, the aqueous and / or oily gel phase is an aqueous gel phase.

[0076] In the case where the variant is based in whole or in part on a fatty gelled phase, The lipophilic gelling agent may be identical or different from that(s) present in the solid phase and may be as defined previously,

[0077] According to one embodiment, the aqueous and / or oily gel phase comprises from 0.1% to 30%, preferably from 0.2% to 20%, in particular from 0.3% to 15%, especially from 0.4% to 10%, and better from 0.5% to 5%, by weight of hydrophilic and / or lipophilic gelling agent(s) relative to the total weight of the aqueous and / or oily gel phase.

[0078] According to one embodiment, the mass percentage of water in the aqueous and / or fatty gel phase can be between 0.5 and 50%, preferably between 1 and 40%, in particular between 2.5 and 30%, and better between 5 and 20%, by weight relative to the total mass of the aqueous and / or fatty gel phase. Hydrophilic gelling agent

[0079] The aqueous and / or oily gelled phase may include at least one hydrophilic gelling agent, i.e., one that is soluble or dispersible in water. Hydrophilic gelling agents allow for modulation of the fluidity of the phase containing them, and therefore the desired sensory and / or galenic properties, and / or contribute to further improving the kinetic stability of the composition.

[0080] A hydrophilic gelling agent according to the invention can be chosen from thermosensitive, shear-thinning and / or hydrophilic gelling agents suitable for gelling in the presence of at least one salt or base.

[0081] Advantageously, a hydrophilic gelling agent is a heat-sensitive gelling agent, namely one that reacts to heat, and in particular is a gelling agent that is solid at room temperature and liquid at a temperature above 50°C, preferably above 60°C, and better still above 70°C. Preferably, a heat-sensitive hydrophilic gelling agent according to the invention has a melting point between 50°C and 130°C, and preferably between 60°C and 120°C.

[0082] Examples of hydrophilic gelling agents include:

[0083] - natural gelling agents, in particular selected from seaweed extracts, such as for example agar-agar, carrageenans, alginates; plant exudates, such as tragacanth gum, Karaya gum, gatty gum, gum arabic; seed extracts such as locust bean gum, guar gum, tara gum, konjac gum, pectins; fungal exudates or extracts, such as sclerotium gum;Microorganism exudates, such as xanthan gum, gellan gum, pullulan, sclerotium gum, alcasealan marketed by Hakuto (INCI: Alcaligenes Polysaccharides), and other natural agents, such as gelatin, collagen, keratin, vegetable proteins, particularly wheat and / or soy, anionic, cationic, non-ionic or amphoteric chitin or chitosan polymers, hyaluronic acid or one of its salts, in particular sodium hyaluronate such as that marketed under the names HA Oligo, SC Hyaluronic Acid or HyaCare; and mixtures thereof;

[0084] - semi-synthetic gelling agents, in particular selected from derivatives of the cellulose and modified starches,

[0085] - synthetic gelling agents, in particular selected from homopolymers (meth)acrylic acid or one of their esters, (meth)acrylic acid copolymers or one of their esters, AMPS (2-acrylamido-2-methylpropane sulfonic acid) copolymers, associative polymers,

[0086] - other gelling agents, in particular selected from polyethylene glycols (marketed under the name Carbowax), clays, silicas such as those marketed under the names Aérosil® 90 / 130 / 150 / 200 / 300 / 380), and

[0087] - their mixtures.

[0088] For the purposes of this invention, "associative polymer" means any amphiphilic polymer comprising in its structure at least one fatty chain and at least one hydrophilic portion; associative polymers according to this invention may be anionic, cationic, non-ionic or amphoteric; these include, in particular, those described in FR2999921. Preferably, they include amphiphilic and anionic associative polymers and amphiphilic and non-ionic associative polymers as described below.

[0089] These hydrophilic gelling agents are described in more detail in FR3041251.

[0090] A person skilled in the art shall take care to choose the hydrophilic and / or lipophilic gelling agent(s) and / or their quantity in such a way that the advantageous properties of the solid composition according to the invention are not, or are not substantially, altered by the envisaged addition. In particular, a person skilled in the art shall take care to choose the hydrophilic and / or lipophilic gelling agent(s) and / or their quantity with regard to their melting point in such a way that the aqueous and / or oily gelled phase is (i) in a liquid form under certain conditions, particularly temperature, to ensure the manufacture of a solid composition according to the invention and (ii) in a gelled form at room temperature and, where appropriate, at rest, i.e., in the absence of shear, so as not to alter the integrity of the solid composition.Indeed, this liquid state is required to ensure the incorporation (or injection) of the aqueous and / or oily gel phase into the cavities. These adjustments fall within the general knowledge of a person skilled in the art. Additional compounds

[0091] A solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gelled phase, may further comprise at least one additional compound different from the aforementioned lipophilic gelling agents, oils, and / or hydrophilic gelling agents.

[0092] Thus, a solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gelled phase, may further comprise powders; flakes; coloring agents, in particular selected from water-soluble or insoluble, oil-soluble or insoluble, organic or inorganic coloring agents, optical effect materials, liquid crystals, and mixtures thereof; particulate agents insoluble in the oily phase; fragrance agents; fillers, of a nature organic or mineral, and in particular pigments; preservatives; humectants; effervescent agents; disintegrating agents (e.g. Croscarmellose, carboxymethylcellulose, ...); stabilizers; chelators; emollients; pH modifiers, osmotic strength modifiers and / or refractive index modifiers etc... or any usual (cosmetic) additive; and mixtures thereof.

[0093] Also, a solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gel phase, may further comprise at least one biological / cosmetic active ingredient selected from among moisturizing agents, vitamins, healing agents, depigmenting agents, UV filters, desquamating agents, enzymes, antioxidant agents, active ingredients stimulating the synthesis of dermal and / or epidermal macromolecular molecules, dermo-contracting agents, anti-perspirant agents, soothing agents and / or anti-aging agents, and mixtures thereof.

[0094] A solid composition according to the invention, in particular the solid phase and / or the aqueous and / or fatty gelled phase, may further comprise at least one unsaturated fatty acid, monounsaturated or polyunsaturated, preferably in C6-C22, in particular in C8-C20, and better in Ci2-Ci8, such as for example lauric acid (C12), myristic acid (C14), palmitic acid (Ci6), stearic acid (C[8], ricinoleic acid (Ci8), and mixtures thereof.

[0095] A solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gel phase, may further comprise at least one oil, in particular a vegetable oil, such as, for example, coconut oil, olive oil, sweet almond oil, castor oil, babassu oil, and mixtures thereof. Examples of oils described in WO2021234135 may be cited.

[0096] In particular, a solid composition according to the invention, in particular the solid phase and / or the fatty gelled phase, may comprise from 10% to 90%, preferably from 20% to 80%, in particular from 30% to 70%, and better from 40% to 60%, by weight of oil(s) relative to the total weight of the composition (or phase) comprising it / them.

[0097] A solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gel phase, may further comprise at least one detergent agent, for example a surfactant, notably selected from Sodium cocoyl isethionate, Sulfosuccinates, Alpha oleficinalis, Alkyl glyceryl ether sulfonate, Sodium cocoyl monoglyceride sulfate, Betaine, and mixtures thereof. This is particularly the case when the composition according to the invention is a SYNDET (which derives from the term "synthetic detergents") also referred to as "soap-free soap" or "dermatological bar".

[0098] In the case where the solid composition according to the invention is dedicated to hair care, the composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gel phase, may further comprise at least one hair active ingredient, in particular among those described in the patent application filed under No. FR2206462.

[0099] In the case where the solid composition according to the invention is intended for cleaning (excluding the cleaning of keratinous materials), particularly as a household product and / or as laundry detergent, the solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gel phase, may further comprise at least one alkali compound, a complexing agent, a sequestering agent, an enzyme, a bleaching agent, an activator, a brightening agent, a polycarboxylate, abrasive particles, a descaling agent, sodium bicarbonate, a hydrotrope, a softener, an adjuvant or co-adjuvant, a preservative, an electrolyte, an effervescent agent, a disintegrating agent, an essential oil, a perfumer, a biocide, a disinfectant, a coloring agent, glitter, a plasticizer, a binder, an absorbent agent, a foaming agent, a masking agent, a pH regulating agent, or any common cleaning additive, and mixtures thereof,and in particular those described in the patent application filed under number FR2206461.

[0100] A solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gel phase, may further comprise at least sodium lactate and / or at least one salt. Such ingredients have the particular advantage of hardening the solid composition.

[0101] Advantageously, a solid composition according to the invention, in particular the solid phase and / or the aqueous and / or oily gel phase, does not comprise polyvinyl alcohol (PVA or PVOH), polyvinylidene fluoride (PVDF), polymethyl methacrylate (PMMA), polyacrylonitrile (PES or PAN), polyethylene terephthalate methacrylate, polyethylene, polypropylene, nylon, hyaluronic acid, starch, cellulose (e.g. rayon), cotton, and mixtures thereof.

[0102] A composition according to the invention, in particular the solid phase, may further comprise at least one solvent capable of evaporating in whole or in part during the manufacturing process, as described below. Examples of solvents include a nonpolar or slightly polar organic solvent, such as cyclohexane, THF (tetrahydrofuran), and mixtures thereof.

[0103] Of course, a person skilled in the art will take care to choose any additional compound(s) and / or their quantity in such a way that the advantageous properties of the solid composition according to the invention are not or substantially not altered by the envisaged addition. Likewise, a person skilled in the art will take care to choose the nature and / or The quantity of additional compound(s) depends on whether the phase in question is aqueous or oily and / or on the manufacturing process of the solid composition. These adjustments fall within the general knowledge of a person skilled in the art.

[0104] When the composition according to the invention is a soap and / or a shampoo, the solid composition advantageously satisfies at least one of the criteria (or indices) among those defined below:

[0105] - the composition has a cleaning power between 12 and 22, the highest number A high level means the soap will be more cleaning;

[0106] - the composition has a Hardness index between 29 and 54, the highest number indicating the hardest soap and the lowest number indicating a milder soap;

[0107] - the composition has an Emollience index between 44 and 69;

[0108] - the composition has a foaming power between 14 and 46, the highest number high indicating larger bubbles and the lowest number indicating smaller bubbles;

[0109] - the composition has an oiliness index between 16 and 48;

[0110] - the composition has an iodine value between 41 and 70; and / or

[0111] - the composition has an INS (lodine Saponification Number) between 136 and 170, preferably between 150 and 165.

[0112] The above criteria (or indices), as well as their method of measurement, fall within the general knowledge of a person skilled in the art.

[0113] The solid nature of a composition according to the invention advantageously eliminates the need for conventional packaging. Indeed, the packaging of a solid composition according to the invention can be limited to simple wrapping in paper. Manufacturing process

[0114] A solid composition according to the invention is obtained by any process known to a person skilled in the art adapted to the manufacture of a solid composition, with the necessary adaptations to ensure (i) the formation of cavities, and thus satisfy the required porosity criterion, and (ii) the incorporation (or injection) of the aqueous and / or oily gelled phase into at least one cavity of the solid composition.

[0115] Naturally, the quantity of aqueous and / or oily gel phase will be adjusted according to the volume of the cavity. This injection can be carried out using any technique known to those skilled in the art, in particular using an injection nozzle, which may be heated. Procedure No. 1

[0116] According to a first embodiment, a method for manufacturing a solid composition according to the invention comprises at least the steps of:

[0117] (i) have a first fatty phase or a phase derived from a saponification reaction in liquid or semi-liquid form;

[0118] (ii) have a second aqueous and / or oily phase comprising at least one hydrophilic and / or lipophilic gelling agent in liquid or semi-liquid form;

[0119] (iii) pour the first phase into a mold and dry until a solid composition is obtained,

[0120] (iv) cut the solid composition into the desired shape,

[0121] (v) form at least one cavity in the solid composition, and

[0122] (vi) injecting the second phase into all or part of the cavities, thereby obtaining a solid composition according to the invention.

[0123] According to a particular embodiment, the manufacturing process of the solid composition is based on a saponification process (or “paste”).

[0124] Step (i) is advantageously carried out while hot.

[0125] Step (ii) is advantageously carried out hot in the case where the hydrophilic and / or lipophilic gelling agent is thermosensitive and / or via the application of a sufficient shear force in the case where the hydrophilic and / or lipophilic gelling agent is shear-thinning, so as to ensure good incorporation (or injection) of the second phase into the cavity(ies) in step (vi).

[0126] Advantageously, steps (iv) and (v) are simultaneous.

[0127] Advantageously, steps (iii), (iv) and (v) are simultaneous, in which case the mold has a suitable shape to ensure the formation of the cavity(ies).

[0128] Step (v) is advantageously carried out using a cutter.

[0129] Process No. 1 is advantageous in that the scraps obtained at the end of step (v) can be recovered during subsequent manufacturing. Indeed, these scraps can be reheated and reintroduced into a subsequent process no. 1 at step (i) and / or (iii).

[0130] Advantageously, particularly when the solid composition according to the invention is a soap and / or a shampoo, and therefore includes a soap phase as described above; a process according to the invention may further include, before step (iii), at least one washing step, in order to remove the remaining soda. Method No. 2

[0131] According to a second variant, a method for manufacturing a solid composition according to the invention is an extrusion method.

[0132] Such a manufacturing process according to the invention comprises at least the steps of: a. have a first oily phase or a phase derived from a saponification reaction in liquid or semi-liquid form; b. have a second aqueous and / or oily phase comprising at least one hydrophilic and / or lipophilic gelling agent in liquid or semi-liquid form;

[0133] (c) passing the first phase of step (a) through an extrusion device provided from a specially shaped die to form a solid bar,

[0134] (d) cutting the bar obtained in step (c) to obtain a solid composition comprising at least one cavity; and

[0135] (e) injecting the second phase into all or part of the cavities, thereby obtaining a solid composition according to the invention.

[0136] Step (a) is advantageously carried out while hot.

[0137] Step (b) is advantageously carried out hot in the case where the gelling agent hydrophilic and / or lipophilic is thermosensitive and / or via the application of sufficient shear force in the case where the hydrophilic and / or lipophilic gelling agent is shear-thinning, so as to ensure good incorporation (or injection) of the second phase into the cavity(ies) in step (e).

[0138] For obvious reasons, step (c) is carried out at a suitable temperature to obtain a composition with sufficient viscosity and capable of retaining the shape given by the die.

[0139] For obvious reasons, the shape of the die of the extrusion device is also adapted to ensure the formation of the cavity(ies).

[0140] Advantageously, step (c) can be carried out at a temperature lower than ambient temperature, and for example at a temperature less than or equal to 15°C, or even less than or equal to 10°C.

[0141] At step (c), the extrusion device includes a die with a shape adapted to form the cavity(ies) and the desired level of porosity in the solid bar.

[0142] By way of illustration, an extrusion process according to the invention includes a die such as that illustrated in [Fig.2].

[0143] Step (d) can be carried out using a knife or a wire, such as for example a butter cutter.

[0144] Preferably, steps (c) and (d) are simultaneous.

[0145] Preferably, the manufacturing process for a composition according to the invention is the extrusion process No. 2 described above.

[0146] According to a particular embodiment, applicable to processes No. 1 and No. 2 described above, step (i) / (a) consists of having a fluid composition which may include at least one solvent capable of evaporating in whole or in part during step (iii) / (c), or even further during step (iv) and / or (v) / (d).

[0147] As a solvent, one can cite for example a nonpolar or slightly polar organic solvent, for example cyclohexane, THF (tetrahydrofuran), and their mixture.

[0148] In processes No. 1 and No. 2 above, where the solid phase of the solid composition comprises at least one oily phase comprising at least one lipophilic gelling agent, step (i) / (a) may require heating said composition to a temperature above the highest melting point of the lipophilic gelling agents present in said composition.

[0149] According to a particular embodiment, extrusion process no. 2 can be carried out by a 3D printing technique.

[0150] A manufacturing process according to the first or second variant described above may include an additional step occurring between the manufacture of the solid composition and the injection step of the second phase, this additional step aimed at placing the solid composition in a receptacle provided with a design adapted to give the cavity(ies) intended to be filled with the second phase a particular design, different from that given by the cavity.

[0151] In other words, the receptacle can be described here as a shaped part or mold. Use

[0152] A solid composition according to the invention can be used in the field of cleaning, in particular as a household product and / or as laundry detergent, or in the cosmetic field, in particular for the hygiene, cleaning, beautification, care and / or makeup of a keratinous material, in particular of the skin and / or hair.

[0153] In particular, a solid composition according to the invention can be dedicated to the hygiene, cleaning and / or beautification of a keratinous material.

[0154] In particular, a solid composition according to the invention is dedicated to the hygiene of keratinous material, especially skin and / or hair, such as, for example, toothpastes, deodorants, shower gels, intimate washes, soaps, shampoos, mouthwashes, hair care products (hair dyes and bleaches), hair conditioning products, cleaning products, shaving and depilatory products, such as, for example, aftershaves, depilatory creams and shaving creams, and bath and shower preparations, such as, for example, bubble baths, bath oils, and bath salts. Preferably, a solid composition according to the invention is a soap and / or a shampoo.

[0155] A solid composition according to the invention can also be used for cleaning, in particular as a household product and / or as laundry detergent. Thus, a solid composition according to the invention intended for cleaning advantageously further comprises at least one surfactant and / or at least one detergent.

[0156] A solid composition according to the invention can also be dedicated to the care and / or makeup of a keratinous material, in particular of the skin and / or lips.

[0157] The use of a solid composition according to the invention can be carried out in the presence of water added to the solid composition before, simultaneously and / or after its application to the surface to be treated.

[0158] A solid composition according to the invention, in particular when it comprises a sufficient quantity in aqueous and / or oily gel phase, in particular in aqueous gel phase, can also be brought into direct contact with the surface to be treated without requiring the addition of water before, simultaneously and / or after application to the surface to be treated. DESCRIPTION OF THE FIGURES

[0159] [Fig.1] Fig.1 represents a composition according to the invention having honeycomb cavities (top view), where three cavities comprise an aqueous gel phase.

[0160] [Fig.2] Fig.2 represents a die used for the process of the invention.

[0161] [Fig.3] The [Fig.3] represents a comparative process.

[0162] [Fig.4] Fig.4 represents further examples of solid compositions according to The invention, in which a portion of the cavities comprises an aqueous gel phase. EXAMPLES

[0163] Example 1 - Comparative study for skin cleansing

[0164] Step 1 a - soap phase preparation:

[0165] Using a mixer and a water bath at 80°C, the raw materials are mixed described in the following table 1 until a homogeneous mixture is obtained.

[0166] [Tables 1] Name Weight (in kg) Phase Water 85 A Pure caustic soda 35 A Coconut oil 80 B Shea butter 60 B Olive oil 100 B Sweet almond oil 8 C Total 368

[0167] In a first container, water and caustic soda are mixed (= mixture A). In a second container, melt and mix the coconut oil and shea butter in a double boiler (70°C), then add the olive oil and mix until... Homogenization (= mixture B). When the temperature of mixtures A and B is below 40°C, mixture A is poured into mixture B and sweet almond oil is added, then mixed until homogenized (= mixture C). Mixture C is left to stand for 48 hours at room temperature. The pH of mixture C is between 9 and 10.

[0168] Step 1b - preparation of the aqueous gel phase;

[0169] Using a mixer and a water bath at 80°C, the raw materials described in the following table 2 are mixed until a homogeneous mixture is obtained.

[0170] [Tables2] Name Name INCI Weight (in kg) Osmosis water Aqua Qsp Microcare PE Phenoxyethanol, aqua 0.80 Microcare Emollient PTG Pentylene Glycol, aqua 2.00 Agar Agar Agar 0.50 Glycerin codex (99%) Glycerin 51.00 EDTA BD DISODIUM EDTA 0.04 Total 100

[0171] * Sufficient Quantity For

[0172] The preparation of this aqueous phase falls within the general knowledge of a person skilled in the art.

[0173] This aqueous phase will then be either hot mixed (i.e. 80°C) with the mixture C obtained in step a prior to the aforementioned cooling step and the extrusion step described below, or hot injected (and therefore in liquid form) into 3 cavities of the solid composition obtained from the extruded mixture C.

[0174] Step 2 - extrusion:

[0175] The mixture C, optionally combined with the aqueous gel phase, is injected into an extruder equipped, in a first case, with a die according to the invention as illustrated in [Fig. 2] and in a second case, with a comparative die as illustrated in [Fig. 3]. If necessary, the injected composition is preheated to change from a solid to a paste-like state and thus ensure the proper execution of the extrusion step. At the die exit, the extruded soap bars are cut to obtain single-dose soaps, respectively, in the form of a solid composition according to the invention having 7 honeycomb-shaped cavities (soaps 2 and 3, for example, like the one described in [Fig. 1]) and a comparative solid composition having a general shape identical to soaps 2 and 3 but without cavities (soap 1).

[0176] Soaps 1 and 2 are obtained from a pre-extrusion composition based on a mixture "mixture C (95%) / aqueous gel phase (5%)".

[0177] Soaps 3 are obtained from a pre-extrusion composition consisting solely of mixture C, with the aqueous gel phase being injected in liquid form after extrusion into only 3 cavities. In soaps 3, mixture C and the aqueous gel phase represent approximately 15% and 35% of the solid composition, respectively, the remainder being accounted for by the volume occupied by the 4 empty cavities.

[0178] Step 3 - application:

[0179] Step 3 is carried out on a panel of 18 women and 18 men between 22 and 47 years old (hereinafter the "candidates"), 3 groups are then formed, each group consisting of 6 women and 6 men (groups A, B and C).

[0180] For each group:

[0181] 3.1 / The candidates pour a glass filled with 30 cl of tap water over both hands.

[0182] 3.2 / Next, the candidates wash their hands with soap 1, 2 or 3.

[0183] 3.3 / The candidates rinse their hands with tap water and then dry their hands.

[0184] Each of groups A, B and C will use soaps 1, 2 and 3, but each time in different orders.

[0185] Candidates evaluate the performance of soaps 1, 2 and 3 in terms of (i) grip, (ii) mechanical resistance to grip, (iii) solid -> liquid transformation kinetics, (iv) foaming ability, (v) sensory and comfort during application and (vi) condition of the soap after use.

[0186] Rating criteria:

[0187] [Tables3] RATING CRITERIA 0 1 2 Grip Satisfactory Average Poor Mechanical resistance Satisfactory Average Poor Solid to liquid transformation kinetics <15 seconds 15-40 seconds >40 seconds Foam High Average Insufficient Sensory experience and comfort during application Satisfactory Average Poor Condition of soap after use Early disappearance Some residue General structure preserved

[0188] The averages of the results obtained with the three groups A, B and C are presented in the following table 4, it being understood that the trends observed are identical between the three groups.

[0189] [Tables4] Soap 1 (Comparative) Soap 2 (Comparative) Soap 3 (Invention) Composition Aqueous gel phase (5%) mixed with mixture C (95%) before extrusion Aqueous gel phase (5%) mixed with mixture C (95%) before extrusion Aqueous gel phase injected into 3 of the 7 cavities after extrusion of mixture C Grip 0 0 0 Mechanical resistance 0 1 1 Kinetics of solid -> liquid transformation 2 0 0 Sensory and Comfort during application 2 1 0 Foam 2 1 0 State of the soap after use 2 0 0

[0190] Soaps 2 and 3 exhibit less mechanical resistance than soap 1 due to their honeycomb structure and the significant volume of the cavities. Nevertheless, this mechanical resistance remains perfectly satisfactory for the intended use.

[0191] Soap 3 according to the invention is the one which has the best performance in terms of sensory appeal and comfort during application and quantity of foam formed.

[0192] The presence of the aqueous gelled phase did not alter the kinetics of the transformation from the solid to the liquid state.

[0193] Finally, it was found that soap 3 even allows one to bypass step 3.1 in which candidates pour a glass filled with 30 cl of tap water over both hands.

[0194] The invention is therefore based on a subtle compromise between (i) mechanical resistance, (ii) kinetics of the transformative effect and (iii) sensory and comfort in application.

[0195] A study similar to that described above was also carried out with a SYNDET (also referred to as "soap-free soap" or "dermatological bar"). Identical results were obtained.

[0196] Example 2 - Comparative study for hair care (i.e. shampoo)

[0197] The present comparative study differs from that described in Example 1 by the composition of the solid phase and its use, in this case a shampoo. In step 3, the candidates apply the tested composition to their hair, having first mixed it with both hands until a viscous liquid solution is obtained.

[0198] The composition of the solid phase of this Example 2 is described in Table 5 below.

[0199] [Tables5] INCI NAME % Phase LABRAFAC CC Caprylic / CapricTriglyceride QSP* A CETIOL OE Dicaprylyl Ether 20.00 A JOJOBA OIL Simmondsia Chinensis (Jojoba) Seed Oil 8.00 A Avocado Oil Persea Gratissima (Avocado) Oil 4.00 A ESTOGEL M Castor Oil / IPDI Copolymer (and) Caprylic / C apricTriglyceride 30.00 A ESTOGEL GREEN HydrogenatedCastor Oil / SebacicAcid Copo lymer 8.00 A REP'HAÏR Behenyl / Stearyl aminopropanediol esters 0.20 A Coenzyme Q10 Ubiquinone 0.2 B COPHEROL 1250 C Tocopheryl Acetate 0.50 B PARFUM Fragrance 0.50 B Total 100.00

[0200] * Sufficient Quantity For Preparation protocol:

[0201] - Introduce the ingredients of phase A into a container and heat the mix under stirring at 90°C until homogenized; - Cool to 70°C and add the ingredients of phase B while stirring until homogenized.

[0202] The results are substantially identical to those described in example 1.

[0203] Example 3 - Comparative study for skin care

[0204]

[0205]

[0206]

[0207]

[0208]

[0209] This comparative study differs from that described in Example 1 in the composition of the solid phase and its use, in this case a skincare composition. In step 3, the participants apply the tested composition to their facial skin. The composition of the solid phase in this example 3 is described in Table 6 below. [Tableauxô] INCI NAME % Phase LABRAFAC CC Caprylic / CapricTriglyceride QSP* A CASTOR OIL RicinusCommunis(Castor) SeedOil 8.00 A ESTOGEL M Castor Oil / IPDI Copolymer (and) Caprylic / C apricTriglyceride 30.00 A ESTOGEL GREEN HydrogenatedCastor Oil / SebacicAcid Copolymer 8.00 A LUSPLAN DD- DA7 Dimer DilinoleylDimer Dilinoleate 3.70 A Coenzyme Q10 Ubiquinone 0.2 B COPHEROL 1250 C Tocopheryl Acetate 0.50 B PARFUM Fragrance 0.50 B Total 100.00 * Sufficient Quantity For Preparation protocol: - Introduce the ingredients of phase A into a container and heat the mixture under stirring to 90°C until homogenized; - Cool to 70°C and add the ingredients of phase B while stirring until homogenized. The results are substantially identical to those described in example 1, with the exception of the foaming characteristic which, for obvious reasons, was not considered.

Claims

Demands

1. Solid composition comprising at least one cavity such that the composition comprises a porosity greater than or equal to 20% by volume relative to the total volume of the solid composition, wherein the solid composition comprises an oily phase comprising at least one lipophilic gelling agent or a phase derived from a saponification reaction, at least one cavity comprises at least one aqueous and / or oily gelled phase, preferably aqueous, wherein the minimum width of the cavities is greater than or equal to 1 mm, and wherein the ratio between the volume of the cavity(ies) and the total volume of the composition is between 0.2 and 0.

8.

2. Solid composition according to claim 1, wherein the porosity is greater than or equal to 30%, preferably greater than or equal to 40%, in particular greater than or equal to 50%, or even greater than or equal to 60%, in particular greater than or equal to 70%, and most particularly greater than or equal to 80%, by volume relative to the total volume of said solid composition.

3. Solid composition according to claim 1 or 2, wherein the cavity(ies) is / are through-hole(s).

4. Solid composition according to any one of the preceding claims, said composition comprising one or more cavities, preferably several cavities, identical or different.

5. Solid composition according to any one of the preceding claims, wherein the cavity(ies) are round, oblong, ovoid, triangular, polygonal, honeycomb, or in the form of a tiling (or cutting), for example of the Voronoi diagram type, preferably in the form of a honeycomb.

6. Solid composition according to any one of the preceding claims, wherein the ratio between the volume of the cavity(s) and the total volume of the composition is between 0.2 and 0.7, or even between 0.2 and 0.

6.

7. Solid composition according to any one of the preceding claims, wherein the aqueous and / or fatty gelled phase comprises at least one hydrophilic and / or lipophilic gelling agent, preferably thermosensitive.

8. Solid composition according to claim 7, comprising from 0.1% to 30%, preferably from 0.2% to 20%, in particular from 0.3% to 15%, most particularly from 0.4% to 10%, and better from 0.5% to 5%, by weight of hydrophilic and / or lipophilic gelling agent(s) relative to the total weight of the aqueous and / or oily gelled phase.

9. Solid composition according to any one of the preceding claims, wherein the solid composition is a single-dose composition.

10. Solid composition according to any one of the preceding claims, wherein the composition is a topical composition.

11. A method for manufacturing a solid composition according to any one of the preceding claims, comprising at least the steps of: (i) having a first oily phase or a phase derived from a saponification reaction in liquid or semi-liquid form; (ii) having a second aqueous and / or oily phase comprising at least one hydrophilic and / or lipophilic gelling agent in liquid or semi-liquid form; (iii) pouring the first phase into a mold and drying until a solid composition is obtained; (iv) cutting the solid composition into the desired shape; (v) forming at least one cavity in the solid composition; and (vi) injecting the second phase into all or part of the cavities, thereby obtaining a solid composition according to any one of claims 1 to 10.

12. A method for manufacturing a solid composition according to any one of claims 1 to 10, comprising at least the steps of: a. having a first oily phase or a phase derived from a saponification reaction in liquid or semi-liquid form; b. having a second aqueous and / or oily phase comprising at least one hydrophilic and / or lipophilic gelling agent in liquid or semi-liquid form; (c) passing the first phase of step (a) through an extrusion device equipped with a die of suitable shape to form a solid bar, (d) cut the bar obtained in step (c) to obtain a solid composition comprising at least one cavity; and (e) injecting the second phase into all or part of the cavities, thereby obtaining a solid composition according to any one of claims 1 to 10.

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