PROCESS FOR PREPARING MICROCAPSULES

Abstract

The present invention relates to a novel process for preparing core-shell microcapsules. The microcapsules themselves are also an object of the invention. Consumer products comprising the microcapsules, in particular perfumed or flavored consumer products, are also part of the invention.

Description

PROCESS FOR PREPARING MICROCAPSULES Field of Invention The present invention relates to a novel process for preparing core-shell microcapsules. The microcapsules themselves are also an object of the invention. Consumer products comprising the microcapsules, in particular perfumed or flavored consumer products, are also part of the invention. Background of the Invention One of the challenges facing the perfume and fragrance industry is the relatively rapid loss of the olfactory benefits provided by active compounds due to their volatility. Encapsulating these active substances simultaneously protects the encapsulated ingredients from damage such as oxidation and humidity, and allows for a degree of control over the release kinetics of the aroma or fragrance, inducing sensory effects through sequential release. The polyurea-polyurethane-based microcapsule suspension is widely used, for example, in the perfume industry, as it provides a long-lasting, pleasant fragrance after application to various substrates. These microcapsules Ref. 311150 have been extensively described in the prior art (see, for example, applicant documents WO2007 / 004166 or EP 2300146). Therefore, there is still a need to provide new microcapsules without compromising their performance, particularly in terms of stability in a consumer product, as well as delivering good performance in terms of supplying hydrophobic material. The present invention proposes a solution to the aforementioned problem, based on new core-shell microcapsules comprising a crosslinked biopolymer shell. Brief Description of the Invention It has now been discovered that by producing microcapsules that encapsulate hydrophobic materials, active ingredients can preferably be obtained by complexing proteins with salt to densify the membrane, followed by protein cross-linking. Therefore, the process of the invention provides a solution to the aforementioned problems, as it allows for the preparation of microcapsules with the desired stability for various applications. In a first aspect, the present invention relates to a process for preparing a core-shell microcapsule suspension, wherein the process comprises the steps of: (i) Mixing a salt and optionally a crosslinking agent in an aqueous solution comprising at least one protein to form an aqueous phase; (ii) Dispersing an oily phase comprising a hydrophobic material, preferably a perfume oil or a flavoring oil, in the aqueous phase to form an oil-in-water emulsion; (iii) Add a crosslinking agent to the oil-in-water emulsion if the crosslinking agent has not already been added in step (i); (iv) Applying sufficient conditions to induce cross-linking of the protein in order to form a core-shell microcapsule in suspension form. In a second aspect, the invention relates to a core-shell microcapsule suspension comprising at least one microcapsule made of: - an oil-based core - optionally an inner cover made of a polymerized polyfunctional monomer; - a biopolymer coating comprising a protein, wherein at least one protein is cross-linked; and - optionally at least one outer mineral layer. In a third aspect, the invention relates to a suspension of core-shell microcapsules that can be obtained by the process defined above. In a fourth and fifth aspect, the invention relates to perfumed consumer products and flavored edible products comprising the microcapsules defined above. Brief Description of the Figures Figure 1 represents the stability of the microcapsules of the invention in a shower gel base (37 °C-1 week). Figure 2 represents the stability of the microcapsules of the invention in a fabric softener base (37°C-1 week). Figure 3 represents the olfactory behavior of the microcapsules of the invention evaluated on driers of a fabric softener base (37°C-2 weeks). Figure 4 represents the stability of the microcapsules of the invention in a fabric softener base (37°C-1 month). Figure 5 represents the olfactory behavior of the microcapsules of the invention evaluated in line-dried towels from a fabric softener base. Figure 6 represents scanning electron micrographs of mineralized microcapsules according to the invention, mineralized capsule K. Figure 7 represents electron micrographs of ρζοοηη / ηζηζ / E / γίΛΐ scanning of mineralized microcapsules according to the invention, mineralized capsule N. Figure 8 represents scanning electron micrographs of mineralized microcapsules according to the invention, mineralized capsule O. Figure 9 represents scanning electron micrographs of microcapsules according to the invention, capsule E. Figure 10 represents scanning electron micrographs of mineralized P microcapsules subjected to a spray drying protocol, according to the invention mineralized and spray-dried P capsules. Figure 11 represents scanning electron micrographs of the J capsules according to the invention. Figure 12 represents the olfactory performance of the microcapsules of the invention in a roll-on antiperspirant composition evaluated on blotting paper. Figure 13 represents the olfactory behavior of the microcapsules of the invention in a leave-in conditioning composition evaluated on hair. Figure 14 represents the olfactory behavior of the microcapsules of the invention in the rinse-out shampoo composition evaluated on hair. Figure 15 represents the percentage of deposition of microcapsules according to the invention (Capsules E, G, H) as well as mineralized microcapsules according to the invention (Capsules N, K, L) on hair from a model surfactant mixture. Figure 16 represents the stability of the mineral coating on microcapsules according to the invention (Capsule N) in hydrogen peroxide solutions (pH 6.5) after 1 month of incubation at 22°C. Figure 17 represents average olfactory intensities of EdT compositions with high ethanol content demonstrating rubbing effects before and after. Figure 18 represents average olfactory intensities of EdT compositions with low ethanol content demonstrating rubbing effects before and after. Detailed Description of the Invention Unless otherwise stated, percentages (%) are intended to designate a percentage by weight of a composition. A hydrophobic material is understood to be a material that forms a two-phase dispersion when mixed with water. According to the invention, the hydrophobic material can be an inert material such as a solvent or an active ingredient. In one embodiment, the hydrophobic material is a hydrophobic active ingredient. An active ingredient is understood to be a single compound or a combination of ingredients. rzoonn / nznz / E / YiAi Perfume oil or flavoring oil means a single perfume or flavoring compound or a mixture of several flavoring or flavoring compounds. A consumer product or final product is understood to be a manufactured product ready to be distributed, sold and used by a consumer. For the sake of clarity, the term dispersion in the present invention means a system in which the particles are dispersed in a continuous phase of a different composition and specifically includes a suspension or an emulsion. A core-shell microcapsule, or the like, in the present invention means that the capsules have a particle size distribution in the micron range (e.g., a mean diameter (d(v, 0.5)) preferably between approximately 1 and 3000 microns) and comprise a biopolymer shell and an internal continuous oil phase enclosed by the biopolymer shell. According to the invention, the terms mean diameter or mean size are used interchangeably. The microcapsules of the present invention have an average size preferably greater than 10 micrometers, more preferably greater than 15 micrometers, even more preferably greater than 20 micrometers. According to one modality, the microcapsules ρζοοηη / ηζηζ / Ε / γίΛΐ have an average size between 10 and 500 microcapsules, preferably between 10 and 100 microcapsules, more preferably between 10 and 50 microcapsules. According to one modality, the microcapsules have an average size between 15 and 500 micrometers, preferably between 15 and 100 micrometers, more preferably between 15 and 50 micrometers. According to one modality, the microcapsules have an average size between 20 and 500 micrometers, preferably between 20 and 100 micrometers, more preferably between 20 and 50 micrometers. The microcapsules according to the invention are preferably not agglomerated. A biopolymer membrane or biopolymer coating is understood to be a layer comprising cross-linked proteins, preferably enzymatically cross-linked. In the context of the invention, a mineral layer comprises a stable inorganic mineral phase that grows normal to the terminal charged surface of the cover to produce a textured mineral surface. According to one embodiment, the capsules of the present invention are hybrid organic-inorganic capsules. In this particular embodiment, an orthosilicate, a silane, or a combination of silanes can be added to either the oil phase or the aqueous phase to form a hybrid inorganic / organic membrane or a surface coating. The silanes can be suspended in the oil phase to silicify the inner membrane, or they can be added after emulsification to form a silicified shell around the membrane of the growing polymer capsule. Inside-out and outside-in sol-gel polymerization can occur by forming and hardening 3D siloxane bonds within or outside the polymer membrane through alkoxide condensation in or on the emulsion droplets. A mineral precursor is understood to be a mineral precursor necessary for the growth of the desired phase. The mineral precursor is preferably a water-soluble mineral salt containing at least some of the ions required for the growth of the desired mineral phase. The terminology of incubation is used in the context of the present invention to describe the act of immersing the microcapsules in the precursor solution and allowing time for it to interact with the microcapsules. A polyfunctional polymer is understood to be a molecule that, as a unit, reacts or chemically bonds to form a polymer or supramolecular polymer. The polyfunctional polymer of the invention has at least two functions capable of forming a microcapsule shell. ρζοοηη / ηζηζ / Ε / γίΛΐ By polyurea-based inner wall or inner coating, it is understood that the polymer comprises urea linkages produced by an amino functional crosslinker or by hydrolysis of isocyanate groups to produce amino groups capable of further reacting with isocyanate groups during interfacial polymerization. By polyurethane-based inner wall or inner cover, it is understood that the polymer comprises urethane bonds produced by reaction of a polyol with isocyanate groups during interfacial polymerization. Protein refers to a single protein or a combination of proteins. Process for preparing a core-shell microcapsule suspension Therefore, the present invention relates in a first aspect to a process for preparing a suspension of core-shell microcapsules, wherein the process comprises the steps of: (i) mixing a salt and optionally a crosslinking agent in an aqueous solution comprising a protein to form an aqueous phase; (ii) dispersing an oily phase comprising a hydrophobic material, preferably a perfume oil or a flavoring oil, in the aqueous phase to form an oil-in-water emulsion; ρζοοηη / ηζηζ / Ε / γίΛΐ (iii) add a crosslinking agent to the oil-in-water emulsion if the crosslinking agent has not already been added in step (i); (iv) apply sufficient conditions to induce cross-linking of the protein in order to form a core-shell microcapsule in suspension form. According to one modality, step (iv) consists of applying sufficient conditions to induce cross-linking of the protein by the cross-linking agent to form a core-shell microcapsule in suspension form. Hydrophobic material (oil phase) According to one modality, the hydrophobic material is a hydrophobic active ingredient. According to a preferred embodiment, the active ingredient comprises a perfume oil or a flavoring oil. Alternative ingredients that could benefit from encapsulation could be used in place of, or in combination with, a perfume or flavor. Non-limiting examples of such ingredients include a cosmetic, skin care, odor-counteracting, bactericidal, fungicidal, pharmaceutical, or agrochemical ingredient, a disinfectant, an insect repellent or attractant, and mixtures thereof. The nature and type of insect repellent or attractant that may be present in the hydrophobic inner phase does not justify a more detailed description here, which in any case would not be exhaustive, and the expert can select them based on his general knowledge and according to the intended use or application. Examples of such insect repellents or attractants are birch, DEET (N,N-diethyl-m-toluamide), lemon eucalyptus (Corymbia citriodora) essential oil and its active compound p-menthane-3,8-diol (PMD), icaridin (hydroxyethyl isobutyl piperidine carboxylate), nepelactone, citronella oil, neem oil, common myrtle (Myrica gale), dimethyl carbate, tricyclodecenyl allyl ether, IR3535 (3-[N-butyl-N-acetyl]-aminopropionic acid, ethyl ester, ethylhexanediol, dimethyl phthalate, metofluthrin, indalone, SS220, anthranilate-based insect repellents and mixtures thereof. By perfume oil (or also perfume) or flavor / aroma, what is meant here is an ingredient or composition that is a liquid at approximately 20°C. Perfume or flavoring oil may be a single perfume or flavoring ingredient or a mixture of ingredients in the form of a perfume or flavoring composition. By perfume ingredient, we mean a compound used in perfume preparations or compositions to impart, as its primary objective, a hedonic effect. In other words, for an ingredient to be considered a perfume, it must be recognized by an expert in the field as capable of at least imparting or modifying, in a positive or pleasant way, the odor of a composition, and not merely as having an odor.The nature and type of the fragrance ingredients present in the oil phase do not warrant a more detailed description here, which in any case would not be exhaustive. An expert in the field can select them based on their general knowledge and according to the intended use or application and the desired organoleptic effect. Generally speaking, these fragrance ingredients belong to chemical classes as varied as alcohols, aldehydes, ketones, esters, ethers, acetates, nitriles, terpenoids, nitrogenous or sulfurous heterocyclic compounds, and essential oils. Fragrance co-ingredients can be natural or synthetic. Many of these co-ingredients are listed in reference texts such as S. Arctander's book, *Perfume and Flavor Chemicals*, 1969, Montclair, New Jersey, USA.or its more recent versions, or in other works of a similar nature, as well as in the abundant patent literature in the field of perfumery. It is also understood that the ingredients may also be compounds known to release various types of perfume compounds in a controlled manner. The fragrance ingredients can be dissolved in a solvent commonly used in the perfume industry. ρζοοηη / ηζηζ / Ε / γίΛΐ Preferably, the solvent is not an alcohol. Examples of such solvents include diethyl phthalate, isopropyl myristate, Abalyn® (rosin resins, marketed by Eastman), benzyl benzoate, ethyl citrate, limonene, or other terpenes or isoparaffins. Preferably, the solvent is highly hydrophobic and has high spherical hindrance, such as Abalyn® or benzyl benzoate. Preferably, the perfume comprises less than 30% solvent. More preferably, the perfume comprises less than 20%, and even more preferably, less than 10% solvent, all these percentages being defined by weight relative to the total weight of the perfume. Most preferably, the perfume is essentially solvent-free. The preferred fragrance ingredients are those with high spherical hindrance, and in particular those from one of the following groups: - Group 1: perfume ingredients comprising a cyclohexane, cyclohexene, cyclohexanone or cyclohexenone ring substituted with at least one linear or branched C1 to C4 alkyl or alkenyl substituent; - Group 2: Perfume ingredients comprising a cyclopentane, cyclopentene, cyclopentanone or cyclopentenone ring substituted with at least one linear or branched C4a Cg alkyl or alkenyl substituent; - Group 3: Perfume ingredients comprising a phenyl ring or perfume ingredients comprising a cyclohexane, cyclohexene, cyclohexanone or cyclohexenone ring substituted with at least one linear or branched C5 to C8 alkyl or alkenyl substituent or with at least one phenyl substituent and optionally one or more linear or branched C1 to C3 alkyl or alkenyl substituents; - Group 4: perfume ingredients comprising at least two fused or joined C5 and / or C6 rings; - Group 5: perfume ingredients comprising a camphor-type ring structure; - Group 6: perfume ingredients comprising at least one C7a C20 ring structure; - Group 7: perfume ingredients having a logP value greater than 3.5 and comprising at least one terebutyl or at least one trichloromethyl substituent; Examples of ingredients from each of these groups are: - Group 1: 2,4-dimethyl-3-cyclohexeno-l-carbaldehido (origen: Firmenich SA, Ginebra, Suiza), isociclocitral, mentona, isomentona, Romascone® (2,2-dimethyl-6-methylene-lciclohexanocarboxylate de methyl, origin: Firmenich SA, Ginebra, Suiza), nerona, terpineol, dihidroterpineol, terpenyl acetate, dihidroterpenyl acetate, dipentene, eucalyptol, hexilate, pink oxide, Perycorolle® ((S)-l,8-pmentadien-7-ol, origin: Firmenich SA, Geneva, Suiza), 1-pρζοοηη / ηζηζ / Ε / γίΛΐ mentheno-4-ol, acetate de (1RS,3RS,4SR)-3-p-mentanyl, (IR,2S,4R)-4,6,6-trimethyl-bicyclo[3,1,1]heptan-2-ol, Doremox® (tetrahydro-4-methyl-2-phenyl-2H-pyran, origin: Firmenich SA, Geneva, Switzerland), acetato de ciclohexilo, acetato de cyclanol, Fructalate® (diethyldicarboxylate de 1,4-ciclohexano, origin: Firmenich SA, Geneva, Switzerland), Koumalactone® ( (3ARS, 6SR,7ASR)perhidro-3, 6-dimetil-benzo[B]furan-2-one, origin: Firmenich SA, Geneva, Switzerland), Natactone® ((6R)-perhydro-3,6-dimethylbenzo [B]furan-2-one, origin: Firmenich SA,Geneva, Switzerland), 2,4,6-trimethyl-4-phenyl-1,3-dioxane, 2,4,6-trimethyl-3cyclohexano-l-carbaldehyde;, Group 2: (E)-3-methyl-5-(2,2,3-trimethyl-3cyclopentene-l-yl)-4-penten-2-ol (origin: Givaudan SA, Vernier, Switzerland), (l'R,E)-2-ethyl-4-(2',2',3'-trimethyl-3'cyclopenten-1'-yl)-2-buten-l-ol (origin: Firmenich SA, Geneva, Switzerland), Polysantol® ( (1'R,E)-3,3-dimethyl-5-(2',2', 3'trimethi1-3'-cyclopentene-1'-yl)-4-penten-2-ol, origin: Firmenich SA, Geneva, Switzerland), fleuramona, Hedione® HC (methyl-cis-3-oxo-2-pentyl-l-cyclopentane acetate, origin: Firmenich SA, Geneva, Switzerland), Veloutone® (2,2,5-trimethyl-5-pentyl-lcyclopentanone, Sugener, SA, Geneva), Nirvano1® (3,3-dimethy1-5-(2,2,3-trimethyl-3-cyclopentene-1-yl)4-penten-2-ol, origin: Firmenich SA, Geneva, Switzerland), 3-methyl5-(2,2,3-trimethyl-3-cyclopentene-1-yl)-2-pentanol (origin, Givaudan SA, Vernier, Switzerland); ρζοοηη / ηζηζ / Ε / γίΛΐ - Group 3: damasconas, Neobutenone® (1-(5,5-dimethyl1-cyclohexene-l-yl)-4-penten-l-one, origin: Firmenich SA, Geneva, Switzerland), necthalactone ((1'R)-2-[2-(4'-methyl-3'cyclohexen-1-ciclopentanone)), alpha-ionone, betaionone, damascenone, Dynascone® (mixture of 1- (5,5 -dimethyl-1cyclohexen-l-yl) -4-penten-l-one and 1- (3,3-dimethyl-l- cyclohexen-l-one) -4-penten-l-one, origin: Firmenich, SA Geneva, Switzerland), Dorinone® beta(1-(2,6,6-trimethyl-1cyclohexen-l-yl)-2-butene-l-ona, origin: Firmenich SA, Ginebra, Suiza), Romandolide® ((lS,l'R)-[l-(3',3'-dimethyl-l'cyclohexyl)ethoxicarbonyl]methylpropanoate, origin: Firmenich SA, Ginebra, Suiza), 2-terc-butyl-l-cyclohexilo acetate (origen: International Flavors and Fragrances, EE.UU.), Limbanol® (1-(2,2,3,6-tetramethyl-cyclohexyl)-3-hexanol, origin: Firmenich SA, Ginebra, Suiza), trans-1-(2,2,6trimethyl-l-cyclohexyl)-3-hexanol (origen: Firmenich SA, Ginebra, Suiza), (E)-3-methyl-4-(2,6,6-trimethyl-2-cyclohexen1-yl)-3-buten-2-ona, terpenyl isobutyrate, Lorysia® (4-(1,1-dimethylethyl)-1-cyclohexyl acetate, origin: Firmenich SA, Ginebra, Suiza), 8-methoxy-lp-mentene, Helvetolide® propanoate de ((1S, 1'R)-2-[1-(3',3'-dimethyl-1'cyclohexyl)ethoxy]-2-methylpropyl, origin: Firmenich SA, Ginebra, Suiza), para terc-butilciclohexanona, metenotiol, 1metil-4-(4-metil-3-pentenil)-3-ciclohexeno-l-carbaldehido, ciclohexilpropionato de alilo, salicilato de ciclohexilo, ρζοοηη / ηζηζ / Ε / γίΛΐ metilcarbonato de 2-metoxi-4-metilfenilo, 2-metoxi-4metilfenil carbonato de etilo, metil carbonato de 4-etil-2metoxifenilo; Group 4: Methyl cedryl ketone (origin: International Flavors and Fragrances, USA), Verdilato, vetiverol, vetiverone, 1-(octahydro-2,3,8,8-tetramethyl-2-naphthalenyl)-1-ethanone (origin: International Flavors and Fragrances, USA), (5RS,9RS,10SR)-2,6,9,10-tetramethyl-loxaspiro[4.5]deca-3,6-diene and the isomer (5RS,9SR,10RS),6-ethyl-2,10,1O-trimethyl-l-oxaspiro[4.5]deca-3,6-diene, 1,2,3,5,6,7-hexahydro-l,1,2,3,3-pentamethyl-4-indenone (origin: International Flavors and Fragrances, USA), Hivernal® (a mixture of 3-(3,3-dimethyl-5-indanyl)propanal and 3-(1,l-dimethyl-5-indanyl)propanal, origin: Firmenich SA, Geneva, Switzerland), Rhubofix® (3',4-dimethyltricyclo[6.2.1.0(2,7)]undec-4-ene-9-spiro-2'-oxirane, origin: Firmenich SA, Geneva, Switzerland), 9 / 10-ethyldiene-3-oxatricyclo[6.2.1.0(2,7)]undecane, Polywood® (acetato de perhidro-5,5,8A-trimetil-2-naftalenilo, origen: Firmenich SA, Ginebra, Suiza), octalinol, Cetalox® (acetato de triciclo[5.2.1.0(2,6)]dec-3-en-8-ilo y acetato de triciclo[5.2.1.0(2,6)]dec-4-en-8-ilo así como propanoato de triciclo[5.2.1.0(2,6)]dec-3-en-8-ilo y propanoato de ρζοοηη / ηζηζ / Ε / γίΛΐ triciclo[5.2.1.0(2,6)]dec-4-en-8-ilo, (lS,2S,3S)-2 ,6,6-trimethyl-bicyclo[3.1.1]heptane-3-espiro-2'ciclohexen-4'-ona;. - Grupo 5: alcanfor, borneol, acetato de isobornil, 8-isopropil-6-metil-biciclo[2.2.2]oct-5-eno-2-carbaldehído, canhopineno, cedramber (8-metoxi-2,6,6,8-tetrametiltriciclo[5.3.1.0 (1,5) ]undecane, origen: Firmenich SA, Geneva, Switzerland), cedreno, cedrenol, cedrol, Florex® (mixture of 9-etiliden-3-oxatriciclo[6.2.1.0(2,7)]undecan-4-one and 10etiliden-3-oxatriciclo[6.2.1.0(2,7)]undecan-4-one, origin: Firmenich SA, Geneva, Switzerland), 3-methoxy-7,7-dimethyl-10methylen-biciclo[4.3.1]decane (origin: Firmenich SA, Geneva, Switzerland); Group 6: Cedroxyde® (trimethyl-13-oxabiciclo[10.1.0I-trideca-4,8-dieno, origen: Firmenich SA, Ginebra, Suiza), Ambrettolide LG ((E)-9-hexadecen-l6-olida, origen: Firmenich SA, Ginebra, Suiza), Habanolide® (pentadecenolide, origen: Firmenich SA, Ginebra, Suiza), muscenona (3-methyl(4 / 5)-cyclopentadecenone, origin: Firmenich SA, Ginebra, Suiza), muscona (origen: Firmenich SA, Ginebra, Suiza), Exaltolide® (pentadecanolida, origin: Firmenich SA, Ginebra, Suiza), Exaltone® (cyclopentadecanone, origin: Firmenich SA, Geneva, Suiza), (1-etoxietoxi)cyclododecane (origen: Firmenich SA, Ginebra, Suiza), Astrotone, 4,8-cyclododecadien1-ona; ρζοοηη / ηζηζ / Ε / γίΛΐ - Group 7: Lilial® (origin: Givaudan SA, Vernier, Switzerland), rosinol. Preferably, the perfume comprises at least 30%, preferably at least 50%, and more preferably at least 60% of ingredients selected from Groups 1 to 7, as defined above. Highly preferably, the perfume comprises at least 30%, preferably at least 50% of ingredients from Groups 3 to 7, as defined above. Most preferably, the perfume comprises at least 30%, preferably at least 50% of ingredients from Groups 3, 4, 6, or 7, as defined above. According to another preferred modality, the perfume comprises at least 30%, preferably at least 50%, more preferably at least 60% of ingredients having a logP greater than 3, preferably greater than 3.5 and even more preferably greater than 3.75. Preferably, the perfume used in the invention contains less than 10% by weight of primary alcohols, less than 15% by weight of secondary alcohols, and less than 20% by weight of tertiary alcohols. Ideally, the perfume used in the invention contains no primary alcohols and contains less than 15% of both secondary and tertiary alcohols. According to one modality, the oil phase (or oil-based core) comprises: 25-100% by weight of a perfume oil comprising at least 15% by weight of high-impact perfume raw materials having a Log T<-4, and - 0-75% by weight of a density equilibrium material having a density greater than 1.07 g / cm3. High-impact perfume raw materials should be understood as perfume raw materials with a LogT < -4. The odor threshold concentration of a chemical compound is determined in part by its shape, polarity, partial charges, and molecular mass. For convenience, the threshold concentration is presented as the common logarithm of the threshold concentration, i.e., Log[Threshold] (LogT). A "density equilibrium material" should be understood as a material that has a density greater than 1.07 g / cm3 and that preferably has little or no odor. The odor threshold concentration of a fragrance compound is determined using a gas chromatograph (GC). Specifically, the gas chromatograph is calibrated to determine the exact volume of the fragrance oil ingredient injected by the syringe, the precise split ratio, and the hydrocarbon response using a hydrocarbon standard of known concentration and chain length distribution. The airflow rate is precisely measured, and assuming a human inhalation lasts 12 seconds, the sampled volume is calculated. Since the precise concentration at the detector is known at any given time, the mass per volume inhaled, and therefore the concentration of the fragrance compound, is known. To determine the threshold concentration, solutions are sent to the aspiration port at the calculated concentration again. A panelist sniffs the GC effluent and identifies the retention time at which the odor is detected.The average of all panelists determines the odor threshold concentration of the fragrance compound. The determination of the odor threshold is described in more detail in C. Vuilleumier et al., Multidimensional Visualization of Physical and Perceptual Data Leading to a Creative Approach in Fragrance Development, Perfume & Flavorist, Vol. 33, September 2008, pages 54-61. The nature of high-impact perfume raw materials having a Log T<-4 and a density equilibrium material having a density greater than 1.07 g / cm3 are described in document WO2018115250, the content of which is included for reference. According to one modality, high-impact perfume raw materials that have a Log T<-4 are selected from the list in Table A below. Table A: High-impact perfume raw materials that have a Log T<-4 Perfume raw materials (Log T<-4) (+-)-1 -METHOXY-3 -HEXANETHIOL 4-(4-HYDROXY-1 -PHENYL)-2-BUTANONE (+-)-2-(4-METHYL-3-CYCLOHEXEN-l-YL)-2-PROPANOTHIOL 2-METHXY-4-(l-PROPENYL)-l-PHENYL ACETATE PYRAZOBUTYL 3-PROPYLPHENOL -(3 -METHYL-1 -BENZOFURAN-2-YL)AND ANONA 2-(3 ​​-PHENYLPROPYL)PYRIDINE l-(3,3-DIMETHYL-l-CICLOHEXEN-l-YL)-4-PENTEN-l-ONA (A) + l-(5,5-DIMETHYL-lCYCLOHEXEN-1 -YL)-4-PENTEN-1 -ONA (B) 1-(5,5 -DIMETHYL-1 -CICLOHEXEN-1 -YL)-4-PENTEN-1 -ONA (3RS,3ARS,6SR,7ASR)-PERHYDRO-3,6-DIMETHYL-BENZO[B]FURAN-2-ONA (A) + (3SR,3ARS,6SR,7ASR)-PERHYDRO-3,6-DIMETHYL-BENZO[B]FURAN-2-ONA (B) (+-)-1 -(5-ETHYL-5 -METHYL-1 -CICLOHEXEN-1 -YL)-4-PENTEN-1 -ONA (l'S,3'MRI-1-(L-1) ',2',2'-TRIMETYLBICLO[3.1.0]HEX-3'YL)METHYL] CTCLOPROPTL} METHANOL ACETATE OF (+-)-3-MERCAPTOHEXYL (2E)-1 -(2,6,6-TRIMETYL-1,3 -CYCLOHEXADIN-1 -YL)-2-BUTEN-1 -ONA 7-METHYL-2H-l,5-BENZODIOXEPIN-3(4H)-ONA (2E,6Z)-2,6-NONADIEN-1 -OL (4Z)-4-DODECENALL (+-)-4-HYDROXY-2,5-DIMETHYL-3(2H)-FURANONE 2,4-DIHIDROXI-3,6-DIMETILBENZOATO DE METILO 3-METILINDOL (+-)-PERHIDRO-4ALFA,8ABETA-DIMETIL-4A-NAFTALENOL PATCHOULOL 2-METOXI-4-(1 -PROPENIL)FENOL (+-)-5,6-DIHIDRO-4-METIL-2-FENIL-2H-PIRAN (A) + TETRAHIDRO-4-METILONA2-FENIL-2H-PIRANO (B) ρζοοηη / ηζηζ / Ε / γίΛΐ 4-METILONA-2-FENILTETRAHIDRO-2H-PIRANO (A) + (+-)-4-METIL-2-FENIL-3,6DIHIDRO-2H-PIRANO (B) 4-HIDROXI-3-METOXIBENZALDEHÍDO NONILONIC ALDEHIDO 2-METOXI-4-PROPILFENOL (2Z)-3 -METIL-5 -FENIL-2-PENTENENITRILO (A) + (2E)-3-METIL-5-FENIL-2PENTENENITRILO (B) l-(ESPIRO[4.5]DEC-6-EN-7-IL)-4-PENTEN-l-ONA (A) + l-(ESPIRO[4.5]DEC-7-EN-7IL)-4-PENTEN-l-ONA (B) 2-METOXINAFTALENO(-)-(3AR,5AS,9AS,9BR)-3A,6,6,9A-TETRAMETILDODECAHIDRONAFTO[2,1B]FURANO 5-NONANOLIDA (3AR,5AS,9AS,9BR)-3A,6,6,9A-TETRAMETILDODECAHIDRONAFTO[2,1B]FURANO 7-ISOPROPIL-2H,4H-l,5-BENZODIOXEPIN-3-ONA CUMARINA 4-METHYLPHENYL ISOBUTYRATE (2E)-1 -(2,6,6-TRIMETHYL-1,3 -CYCLOHEXADIEN-1 -IL)-2-BUTEN-1 -ONA ρζοοηη / ηζηζ / Ε / γίΛΐ BETA,2,2,3-TETRAMETHYL-DELTA-METHLON-3-CYCLOPENTENO-1-BUTANOL DELTA DAMASCONA ((2E)-l-[(lRS,2SR)-2,6,6-TRIMETHYL-3-CYCLOHEXEN-l-IL]-2BUTEN-l-ONA) (+-)-3,6-DIHYDRO-4,6-DIMETHYL-2-PHENYL-2H-PYRAN ANISALDEHIDO PARACRESOL 3-ETOXI-4-HIDROXIBENZALDEHÍDO 2-AMINOBENZOATE METHYL ETHYL METHYLPHENYLGLYCIDATE OCTALACTONA G -PHENYL-2-PROPENOATE ETHYL (-)-(2E)-2-ETHYL-4-[( lR)-2,2,3 -TRIMETHYL-3 -CYCLOPENTEN-1 -IL] -2-BUTEN-1 -OL PARACRESYL ACETATE DODECALACTON TRICYCLONE (+)-(3R,5Z)-3-METHYL-5-CYCLOPENTADECEN-1-ONE UNDECALACTONA (lR,4R)-8-MERCAPTO-3-P-MENTANONA (3S,3AS,6R,7AR)-3,6-DIMETHYLHEXAHYDRO-l-BENZOFURAN-2(3H)-ONA BETA IONONA (+-)-6-PENTILTETRAHYDRO-2H-PIRAN-2-ONA (3E,5Z)-1,3,5-UNDECATRIENE 10-UNDECENAL (A) + (9E)-9-UNDECENAL (B) + (9Z)-9-UNDECENAL (C) (Z)-4-DECENAL 2-METHYLPENTANOATE DE (+-)-ETHYL 1,2-DIALLYLDISULFAN (2Z)-2-TRIDECENONITRILE (A) + (3Z)-3-TRIDECENONITRILE (B) + (3E)-3TRIDECENONITRILE (C) + (2E)-2-TRIDECENONITRILE (D) (+-)-2-ETHYL-4,4-DIMETHYL-l,3-OXATINE (+)-(3R,5Z)-3 -METHYL-5 -CYCLOPENTADECEN-1 -ONA 3-(4-TERC-BUTlLFENlL)PROPANAL (CYCLOHEXYLOXI)ACETATE DE ALILO METHYLNAPHTHYLCETONA (+-)-(4E)-3-METHYL-4-CYCLOPENTADECEN-l-ONA (A) + (+-)-(5E)-3-METHYL-5CYCLOPENTADECEN-l-ONA (B) + (+-)-(5Z)-3-METHYL-5-CYCLOPENTADECEN-1ONA (C) (3Z)-3-CYCLOPROPYLMETHYL HEXENOATE (A) + (3E)-3-CYCLOPROPYLMETHYL HEXENOATE (B) (4E)-4-METHYL-5-(4-METHYLPHENYL)-4-PENTENAL (+-)-1 -(5-PROPYL-1,3 -BENZODIOXOL-2-IL)ETHANONE 4-METHYL-2-PENTYLPYRIDINE (+-)-(E)-3-METHYL-4-(2,6,6-TRIMETHYL-2-CYCLOHEXEN-l-IL)-3-BUTEN-2-ONA (3ARS,5ASR,9ASR,9BRS)-3A,6,6,9A-TETRAMETHYLDODECAHIDRONAPTHO[2,1B]FURAN ρζοοηη / ηζηζ / Ε / γίΛΐ OXIME OF (2S,5R)-5-METHYL-2-(2-PROPANYL)CYCLOHEXANONE 6-HEXYLTETRAHYDRO-2H-PYRAN-2-ONE (+-)-3-(3-ISOPROPYL-l-PHENYL)BUTANAL 2-((lRS,2RS)-3-OXO-2-PENTYLCICLOPENTYL)METHYL ACETATE (A) + 2((lRS,2SR)-3-OXO-2-PENTYCLOPENTYL)METHYL ACETATE (B) l-(2,6,6-TRIMETYL-l-CEN-CHOLEX-PENTYL-3) INDOL 7-PROPYL-2X,4X-1,5 -BENZODIOXEPIN-3 -ONA ETYL PRALINE (4-METHYLPHENOXY)ACETALDEHYDE TRICYCLO[5.2.1.0.(2,6)]DECANE-2-ETHYL CARBOXYLATE (+)-(rS,2S,E)-3,3-DIMETHYL-5-(2',2',3'-TRIMETYL-3'-CYCLOPENTENE-l'-YL)-4PENTEN-2-24-DIOLMETHYL-3 - [(1 R)-2,2,3 -TRIMETYL-3 -CYCLOPENTEN-1 -IL] -4-PENTEN-2OL (A) + (2S,4E)-3,3-DIMETHYL-5-[(lR)-2,2,3-TRIMETYL-3-CYCLOPENTEN-l-IL]-4PENTEN-2-OL (B) 8-ISOPROPYL-6-METHYL-BICYCLE[2.2.2]OCT-5-ENE-2-CARB ALDEHYDE METHYLNONYLACETALDEHYDE 2-METHYLPROPANOATE DE 4-FORMYL-2-METHOXYPHENYL (E)-4-DECENAL (+-)-2-ETHYL-4-(2,2,3 -TRIMETHYL-3 -CYCLOPENTEN-1 -YL)-2-BUTEN-1 -OL (lR,5R)-4,7,7-TRIMETHYL-6-THIABICICLO[3.2.1]OCT-3-ENO (A) + (lR,4R,5R)-4,7,7TRIMETHYL-6-THIABICICLO[3.2.1 ]OCTANE (B) (-)-(3R)-3,7-DIMETHYL-1,6-OCTADIEN-3-OL (E)-3-PHENYL-2-PROPENONITRILO ACETATO DE4-METHOXYBENCYL (E)-3-METHYL-5-(2,2,3-TRIMETHYL-3-CYCLOPENTEN-1-IL)-4-PENTEN-2-OL (3-METHYLBUTOXI)ACETATO DE ALYLO (A) + (2-METHYLBUTOXI)ACETATO DE (+)-ALYLO (+-)-(2E)-1-(2,6,6-TRIMETHYL-2-CYCLOHEXEN-1-IL)-2-BUTEN-1-ONA (ΙΕ)-1 -(2,6,6-TRIMETHYL-1 -CYCLOHEXEN-1 -IL)-1-PENTEN-3-ONA ρζοοηη / ηζηζ / Ε / γίΛΐ Accordingly, the raw materials of perfume that have a Log T<-4 are selected in the group that consists of aldehydes, cetones, alcohols, phenols, lactonaous esters, ethers, epoxy, nitriles and blends of the same substances. According to one embodiment, perfume raw materials having a Log T<-4 comprise at least one compound selected from the group consisting of alcohols, phenols, esters, lactones, ethers, epoxides, nitriles and mixtures thereof, preferably in an amount between 20 and 70% by weight based on the total weight of perfume raw materials having a Log T<-4. According to one modality, perfume raw materials having a Log T<-4 comprise between 20 and 70% by weight of aldehydes, ketones and mixtures thereof based on the total weight of perfume raw materials having a Log T<-4. The remaining perfume raw materials contained in the oil-based core can therefore have a Log T<-4. Table B below lists non-limiting examples of perfume raw materials that have a Log T<4. ezoonn / nznz / E / YiAi Table B: raw materials of perfumes that have a Log T<-4 Perfume raw materials (Log T>-4) 2-METHYLBUTYRATE ETHYL (E)-3-PHENYL-2-PROPENYL ACETATE (+-)-8-SEC-BUTYLQUINOLINE (A) + (+-)-6-SECBUTYLQUINOLINE (+-)-3-(1,3 -BENZODIOXOL-5 -YL)-2-METHYLPROP ANAL PROPIONATE OF VERDILO -(OCTAHIDRO-2,3,8,8-TETRAMETHYL-2NAPHTHALENIL)-1 -ET ANONA 2-((lRS,2RS)-3-OXO-2PENTILCICHLOPENTIL)METHYL ACETATE (+-)-(E)-4-METHYL-3-DECEN-5-OL 2,4-DIMETHYL-3 -CYCLOHEXENO-1 -CARB ALDEHYDO l,3,3-TRIMETHYL-2-OXABICYCLO[2.2.2]OCTANE TETRAHYDRO-4-METHYL-2-(2-METHYL-1 -PROPENYL)2H-PYRANE ALDEHYDE C 12 1-OXA-12-CYCLOHEXADECEN-2-ONA (A) + 1-OXA13-CYCLOHEXADECEN-2-ONA (B) (+-)-3-(4-ISOPROPYLPHENIL)-2-METHYLPROPANAL ALDEHYDE C 11 LENIQUE (+-)-2,6-DIMETHYL-7-OCTEN-2-OL (+-)-2,6-DIMETHYL-7-OCTEN-2-OL 3-CYCLOHEXYLPROPANOATE DE ALILO ACETATE OF (Z)-3-HEXENYL ρζοοηη / ηζηζ / Ε / γίΛΐ (2RS,5SR)-5-METHYL-2-(2PROPANYL)CYCLOHEXANONE (A) + (2RS,5PROHRS(EXCLOPAN)-ONILACY-2-5METHYL ALYL HEPTANOATE (IRS,2RS)-2-(2-METYL-2PROPANYL)CYCLOHEXYL ACETATE (A) + (lRS,2SR)-2-(2-METYL-2-PROPANYL)CYCLOHEXYL ACETATE (B) l,l-Dimethyl-2-Phenylethyl BUTYRATE geranyl acetate (A) + NEryl acetate (B) (+-)-1 -PHYNYLETHYL ACETATE 1,1-DIMETHYL-2-PHYNYLETHYL ACETATE 3-METYL-2-BUTENYL ACETATE 3-ETHYL OXOBUTANOATE (A) <=> 3-HYDROXY-2BUTENOATE DE (2Z)-ETHYL (B) 8-P-MENTANOL 8-P-MENTANYL ACETATE (A) + 1P-MENTHANYL ACETAT (B) ACETATE OF (+-)-2-(4-METYL-3-CYCLOHHEHEN-l-IL)2-PROPANILY BUTANON ATTO OF (+-)-2-MEthylBUTIO PROPIONATE OF 2-{(lS)-l-[(lR)-3,3DIMETHYLCLOHEXYL]ETOXY}-2-OXOETHYL ρζοοηη / ηζηζ / Ε / γι 3,5,6-TRIMETYL-3 -CYCLOHEXENO-1 CARB ALDEHIDE (A) + 2,4,6-TRIMETYL-3CYCLOHEXENO-l-CARB ALDHEHIDE (B) 2-CYCLOHEXYLETHYL ACETATE ALDEHYDE C 8 ETHYL ATE (+-)-(3E)-4-(2,6,6-TRIMETYL-2-CYCLOHEXEN-l-YL)-3BUTEN-2-ONE (A) + (3E)-4-(2,6,6-TRIMETYL-lCYCLOHEXEN-1 -YL)-3 -BUTENE-2-ONE (B); l-[(lRS,6SR)-2,2,6-TRIMETYLCICLOHEXYL]-3HEXANOL l,3,3-TRIMETYL-2-OXABICLO[2.2.2]OCTANE l,3,3-TRIMETYL-2-OXABICLO[2.2.2]OCTANE ETHYLOATE HEXANOATE CHANNEL END ALDEHYDE C 10 2-PHENYLETHYL ACETATE (lS,2S,4S)-l,7,7-TRIMETYLBICYCLO[2.2.1]HEPTANE-2OL (A) + (1 S,2R,4S)-1,7,7TRIMETYLBICYCLO[2.2. l]HEPTANE-2-OL (B) (+-)-3,7-DIMETHYL-3 -OCTANOL l-METHYL-4-(2-PROPANILIDENE)CYCLOHEXENO (+)-(R)-4-(2-METHOXYPROP AN-2-YL)-1 METYLCICLOHEX-1 -ENO VERDIL ACETATE (3R)-l-[(lR,6S)-2,2,6-YRIMETHYLCYCLOHEXYL]-3HEXANOL (A) + (3S)-l-[(lR,6S)-2,2,6TRIMETHYLCYCLOHEXYL]-3-HEXANOL (B) + (3R)-1[(lS,6S)-2,2,6-TRIMETHYLCYCLOHEXYL]-3-HEXANOL (C) (+)-(lS,rR)-2-[l-(3',3'-DIMETHYL-l'CYCLOHEXYL)ETHOXY]-2-METHYLPROPYL PROPANOATE ρζοοηη / ηζηζ / Β / γι According to one embodiment, the oily phase (or oil-based core) comprises 2-75% by weight of a density equilibrium material having a density greater than 1.07 g / cm3 and 25-98% by weight of a perfume oil comprising at least 15% by weight of high-impact perfume raw materials having a Log T<-4. The density of a component is defined as the ratio between its mass and its volume (g / cm3). There are several methods available to determine the density of a component. One can refer, for example, to the ISO 298:1998 method for measuring d20 densities of essential oils. According to one modality, the density equilibrium material is chosen from the group consisting of benzyl salicylate, benzyl benzoate, cyclohexyl salicylate, benzyl phenylacetate, phenylethyl phenoxyacetate, triacetin, methyl ethyl salicylate, benzyl cinnamate, and mixtures thereof. According to a particular modality, the density equilibrium material is chosen from the group consisting of benzyl salicylate, benzyl benzoate, cyclohexyl salicylate, and mixtures thereof. According to a particular embodiment, the hydrophobic material is free of any active ingredient (such as perfume). According to this particular embodiment, it comprises, preferably consists of hydrophobic solvents, preferably selected from the group consisting of isopropyl myristate, triglycerides (e.g., Neobee® MCT oil, vegetable oils), D-limonene, silicone oil, mineral oil, and mixtures thereof; with optionally hydrophilic solvents preferably selected from the group consisting of 1,4-butanediol, benzyl alcohol, triethyl citrate, triacetin, benzyl acetate, ethyl acetate, propylene glycol (1,2-propanediol), 1,3-propanediol, dipropylene glycol, glycerol, glycol ethers, and mixtures thereof. The term "flavoring ingredient" or "flavoring composition" here refers to a flavoring ingredient or mixture of flavoring ingredients, solvent, or adjuvants currently used in the preparation of a flavoring formulation; that is, a particular mixture of ingredients intended to be added to an edible composition or chewable product to impart, enhance, or modify its organoleptic properties, particularly its flavor and / or taste. Taste modulators are also included in this definition. Flavoring ingredients are well known to someone skilled in the art, and their nature does not warrant a detailed description here, which in any case would not be exhaustive. The flavorer can select them based on their general knowledge and in accordance with the intended use or application and the desired organoleptic effect. Many of these flavoring ingredients are listed in reference texts, such as in the book by S.Arctander, Perfume and Flavor Chemicals, 1969, Montclair, NJ, USA, or its more recent versions, or in other works of a similar nature such as Fenaroli's Handbook of Flavor Ingredients, 1975, CRC Press or Synthetic Food Adjuncts, 1947, by MB Jacobs, Can Nostrand Co., Inc. Solvents and adjuvants or their current use for the preparation of a flavoring formulation are also well known in the art. In one particular modality, the aroma is selected from the group consisting of terpene aromas that include citrus oil and mint, and sulfur aromas. According to any embodiment of the invention, the oil represents between approximately 10% and 60% w / w, or even between 20% and 50% w / w, by weight, with respect to the total weight of the oil-in-water emulsion. Optional polyfunctional monomer (oil phase) According to one modality, a polyfunctional monomer is also added to the oil phase in addition to the hydrophobic material to reinforce the coating. The polyfunctional monomer can be selected from the group consisting of at least one polyisocyanate, polymaleic anhydride, polyacyl chloride, polyepoxide, acrylate monomers, and polyalkoxysilane. The polyfunctional monomer used in the process according to the invention may be present in quantities ρζοοηη / ηζηζ / E / γίΛΐ representing from 0.025% to 15%, preferably from 0.1 to 15%, very preferably from 0.1 to 6% and even more preferably from 0.1 to 1% by weight of the suspension of step iv). According to a particular modality, the polyfunctional monomer is at least one polyisocyanate that has at least two isocyanate functional groups. Suitable polyisocyanates used according to the invention include aromatic polyisocyanate, aliphatic polyisocyanate, and mixtures thereof. The polyisocyanate comprises at least two, preferably at least three, but may comprise up to six, or even only four, isocyanate functional groups. According to one particular embodiment, a triisocyanate (3-isocyanate functional group) is used. According to one modality, the polyisocyanate is an aromatic polyisocyanate. The term aromatic polyisocyanate herein means any polyisocyanate comprising an aromatic moiety. Preferably, it comprises a phenyl, toluyl, xylyl, naphthyl, or diphenyl moiety, more preferably a toluyl or xylyl moiety. Preferred aromatic polyisocyanates are biurets, polyisocyanurates, and trimethylolpropane diisocyanate adducts, most preferably comprising one of the aforementioned specific aromatic moiety members. More preferably, the aromatic polyisocyanate is a toluene diisocyanate polyisocyanurate (commercially available from Bayer under the trade name Desmodur® RC), a toluene diisocyanate trimethylol propane adduct (commercially available from Bayer under the trade name Desmodur® L75), a xylylene diisocyanate trimethylol propane adduct (commercially available from Mitsui Chemicals under the trade name Takenate® D-110N).In a more preferred embodiment, aromatic polyisocyanate is a trimethylolpropane adduct of xylylene diisocyanate. According to another embodiment, the polyisocyanate is an aliphatic polyisocyanate. The term aliphatic polyisocyanate is defined as a polyisocyanate that does not comprise any aromatic moieties. Preferred aliphatic polyisocyanates are a hexamethylene diisocyanate trimer, an isophorone diisocyanate trimer, a hexamethylene diisocyanate trimethylol propane adduct (available from Mitsui Chemicals), or a hexamethylene diisocyanate biuret (commercially available from Bayer under the trade name Desmodur® N 100), of which a hexamethylene diisocyanate biuret is even more preferred. According to another embodiment, the at least one polyisocyanate is in the form of a mixture of at least one aliphatic polyisocyanate and at least one aromatic polyisocyanate, both comprising at least two or three isocyanate functions, such as a mixture of a hexamethylene diisocyanate biuret with a trimethylol propane adduct of xylylene diisocyanate, a mixture of a hexamethylene diisocyanate biuret with a toluene diisocyanate polyisocyanurate, and a mixture of a hexamethylene diisocyanate biuret with a trimethylol propane diisocyanate. Most preferably, it is a mixture of hexamethylene diisocyanate biuret with xylylene diisocyanate trimethylol propane adduct. Preferably, when used as a mixture, the molar ratio between the aliphatic polyisocyanate and the aromatic polyisocyanate is in the range of 80:20 to 10:90. According to this method, an inner shell made of a polyfunctional monomer polymerized by interfacial polymerization is formed during the process. The formation of the inner shell can take place before, during, or after the formation of the biopolymer shell. According to a particular modality mode, the oil phase is free of polyisocyanate, preferably free of any polyfunctional monomer. Protein (aqueous phase) The protein in the aqueous phase is used as an emulsifier and allows the stabilization of the oil droplets it contains. According to one modality, the protein is chosen from the group consisting of milk proteins, caseinate salts such as sodium caseinate or calcium caseinate, casein, whey protein, hydrolyzed proteins, chelates, gluten, pea protein, soy protein, silk protein and mixtures thereof. According to one particular modality, the protein comprises sodium caseinate. The protein can be used in an amount between 0.5 and 10%, preferably between 1 and 8%, more preferably between 2 and 4% by weight based on the total weight of the suspension as defined in step iv). According to another particular modality, the protein is a mixture comprising sodium caseinate and at least one globular protein. A globular protein is understood to be a spherical protein characterized by a tertiary structure in its native state, and capable of unfolding and aggregating under the action of heat, pressure, or specific chemical substances. Non-limiting examples of globular protein that may be used in the invention include whey protein, beta-lactoglobulin, ovalbumin, bovine serum albumin, vegetable proteins, and mixtures thereof. According to a particular modality, the protein is a mixture comprising sodium caseinate and whey protein, preferably a mixture consisting of sodium caseinate and whey protein. The weight ratio of sodium caseinate to globular protein, preferably whey protein, is between 0.01 and 100, preferably between 0.1 and 10, more preferably between 0.2 and 5. When the protein is a globular protein, the process preferably includes an additional heating step to denature the protein. Typically, the heating step is carried out after the crosslinking step at a temperature between 70°C and 90°C. In fact, the combination of enzymatic crosslinking and thermal annealing has been found to improve the performance of the microcapsules of the invention. According to a particular modality, the process comprises the following steps: (i) Mixing a salt into an aqueous solution comprising at least one protein to form an aqueous phase; wherein the protein is a mixture of sodium caseinate and whey protein; (ii) Dispersing an oily phase comprising a hydrophobic material, preferably a perfume oil or a flavoring oil, and optionally a polyfunctional monomer in the aqueous phase to form an oil-in-water emulsion; ρζοοηη / ηζηζ / Ε / γίΛΐ (iii) Add an enzymatic crosslinking agent to the oil-in-water emulsion; preferably transglutaminase; (iv) Applying sufficient conditions to induce crosslinking of sodium caseinate by the crosslinking agent, and (v) Applying sufficient conditions to induce denaturation of whey protein, preferably by a heating treatment to form a biopolymer coating. The heating step can be carried out at a Tden temperature (protein denaturation temperature), preferably between 70°C and 100°C, more preferably between 80°C and 100°C. The duration of the heating step will depend on the heating temperature. Typically, the heating step lasts between 10 and 60 minutes. Salt (aqueous phase) According to the invention, the formation of protein salt complexes is important for protein aggregation and maximizing protein content at the oil / water interface. The salt added in the aqueous phase can be chosen from the group consisting of calcium, sodium, potassium, lithium, magnesium, sulfates, phosphates, nitrates, bromides, chlorides, iodides, ammonium salts and mixtures thereof. According to one modality, the salt is chosen from the group consisting of CaCl2, calcium acetate, calcium lactate, NaCl, KCl, LiCl, Ca(NO3)2, MgCl2, CaBr2, Cal2, NaBr, Nal, NaNO3, KBr, KI, KNO3, LiBr, Lil, MgBr2 and mixtures thereof. According to one modality, the salt is chosen from the group consisting of CaCl2, NaCl, KCl1, LiCl, Ca(NO3)2, MgCl2 and mixtures thereof. When the process includes a mineralization step, the salt is preferably chosen from the group consisting of calcium salts, preferably CaCl2 or Ca(NO3)2 since it is a precursor to mineralization. According to one modality, the weight ratio between salt and protein is between 0.01:1 and 1:1, preferably between 0.1:1 and 0.4:1. The emulsion can be prepared by high-shear mixing and adjusted to the desired droplet size. The droplet size, preferably between 1 and 1000 microns, more preferably between 10 and 50 microns, can be verified by light scattering measurements or microscopy. This procedure does not require further description here, as it is well known to anyone skilled in the art. According to one variant, the average droplet size is greater than 10 micrometers. According to another variant, the average droplet size is greater than 20 micrometers. According to one modality, the average size of the drops is between 10 and 500 mieras, preferably between 10 and 100 mieras, more preferably between 10 and 50 mieras. According to one modality, the average droplet size is between 15 and 500 micrometers, preferably between 15 and 100 micrometers, more preferably between 15 and 50 micrometers. According to one modality, the average droplet size is between 20 and 500 micrometers, preferably between 20 and 100 micrometers, more preferably between 20 and 50 micrometers. Reticulating According to the invention, a crosslinking agent is added during the process to crosslink the protein. Crosslinking is important to join the proteins together to form the biopolymer layer. Even if the presence of the crosslinking agent is an essential feature of the present invention, the crosslinking agent can be added directly to the aqueous phase or, if not added to the aqueous phase, the crosslinking agent is added once the oil forms an emulsion in water. The crosslinking agent can be added in step (i) in the aqueous phase and / or in step (iii) once the oil-in-water emulsion has formed. According to a particular modality, the crosslinking agent is added once the oil-in-water emulsion has been formed. The crosslinking agent used in the present invention may be an enzymatic crosslinking agent such as an enzyme or a non-enzymatic crosslinking agent such as glutaraldehyde or genipin. According to one particular modality, the crosslinking agent is an enzyme. According to one particular modality, the enzyme is transglutaminase. The enzyme can be used in an amount between 0.001 and 0.1%, preferably between 0.005 and 0.02% based on the total weight of the thick suspension from step iii). In some commercial products, the enzyme is dispersed in a carrier. Activa® TI (Origin: Ajinomoto) is an example. In other words, the commercial product is added during processing to provide the enzyme actives in an amount preferably between 0.001 and 5%, preferably between 0.001 and 1%, more preferably between 0.001 and 0.1%, and even more preferably between 0.005 and 0.02%, based on the protein content and total weight of the suspension from step iii). The action required to induce protein crosslinking by the crosslinking agent is well known to those skilled in the art. Typically, the oil-in-water emulsion comprising the crosslinking agent, preferably the enzyme rzoonn / nznz / E / YiAi, is mixed at a temperature between 35°C and 55°C for a time between 30 min and 4 hours to form the biopolymer coating. When the crosslinking agent is an enzyme, once the biopolymer coating has formed, a heating treatment can be carried out on the suspension to deactivate the enzyme. Typically, the heating treatment is performed at a temperature between 70°C and 90°C. Optional warm-up step According to one modality, the process also includes, after the crosslinking step, a heating step, preferably carried out at a temperature between 70 and 90°C. This heating step can be used to deactivate the enzyme when the enzyme is used for crosslinking and / or to induce interfacial polymerization when a polyfunctional monomer is added in the oil phase and / or to induce denaturation of the globular protein when the protein comprises a mixture of a non-globular protein with a globular protein (e.g., a mixture of sodium caseinate and whey protein). This heating step can also be used to bond materials, reduce interstitial spacing, and thermally temper the membrane to reduce defects and porosity. ρζοοηη / ηζηζ / Ε / γίΛΐ Optional biomineralization step According to one modality, the process comprises after the crosslinking step (iv) additional steps consisting of (v) optionally, adsorption of at least one mineral precursor onto the microcapsule shell; (vi) apply suitable conditions to induce the growth of a mineral layer on the microcapsule shell. The additional step (v) can be omitted when the salt added in step (i) is the mineral precursor (for example, when calcium chloride is used as the salt). In that case, the mineral precursor is present throughout the membrane and not just on the surface. In other words, the mineral precursor could already be present from the salt-induced protein packing during and / or after emulsification. Depending on the nature of the mineral precursor, before step (v), the microcapsules can be concentrated or rinsed to remove excess emulsifying solution. The microcapsules can be rinsed, for example, by centrifugation and resuspended in water after removing the supernatant. This method is particularly suitable when the mineral precursor solution is chosen from the group consisting of an iron(II) sulfate solution or an iron(III) chloride solution. Without intending to impose any theory, it is believed that the charged surface of the cover provides functional anchoring sites and a high local density of charge groups and nucleation sites on the surface of the microcapsules, resulting in better adsorption or absorption of mineral precursor species followed by the initiation of the mineral growth process by the in situ addition of a precipitating species. Mineral precursors are adsorbed onto the surface of microcapsules by incubating the charged capsules in at least one solution containing an oppositely charged mineral precursor, providing sufficient agitation and time to allow complete coating of the capsule surfaces. Removal of excess precursor from the solution to prevent the generation of free mineral material can be performed and is followed by the initiation of the mineral growth process through the in-situ addition of a precipitating species. Removal of excess precursor is not necessary in all methods, especially when mineral growth is achieved slowly by reacting low concentrations of mineral precursors to selectively grow material on the biopolymer coating. The expert in the technique will be able to select the appropriate conditions for the mineral growth process (e.g., selection of precursors, reaction conditions, solution concentrations, incubation times, stirring speeds, temperatures and pH conditions). Typically: Mineralization can occur at room temperature; the mineralization process can begin after the addition of the mineral precursor or after the addition of a precipitate (after the addition of the mineral precursor). Depending on the nature of the mineral precursor, the duration of the process can vary from 1 to 24 hours. According to a particular modality, the mineral precursor solution is selected from the group consisting of an iron(II) sulfate solution (comprising iron ions as a precursor), an iron(III) chloride solution (comprising iron ions as a precursor), calcium-based saline solution (comprising calcium ions as a precursor), phosphate-based saline solution (comprising phosphate ions as a precursor), carbonate-based saline solution (comprising carbonate ions as a precursor), titanium-based precursor solution, zinc-based precursor solution, and mixtures thereof. ρζοοηη / ηζηζ / Ε / γίΛΐ Examples include titanium alkoxides as a titanium-based precursor or zinc alkoxides, zinc acetate, zinc chloride as a zinc-based precursor solution. According to a particular modality, the mineral precursor solution is selected from the group consisting of an iron(II) sulfate solution (comprising iron ions as a precursor), an iron(III) chloride solution (comprising iron ions as a precursor), a calcium-based saline solution (comprising calcium ions as a precursor), a phosphate-based saline solution (comprising phosphate ions as a precursor), and mixtures thereof. Water-soluble calcium-based salts can be chosen from the group consisting of calcium chloride (CaCl2), calcium nitrate (CaNO2), calcium bromide (CaBr2), calcium iodide (Cal2), calcium chromate (CaCrO4), calcium acetate (CaCH3CO2), and mixtures thereof. Calcium chloride and calcium nitrate are the most preferred. Water-soluble phosphate-based salt can be chosen from the group consisting of sodium phosphate (monobasic) (NaH2PO4), sodium phosphate (dibasic) (Na2HPO4), sodium phosphate (tribasic): Na3PO4, potassium phosphate (monobasic): KH2PO4, potassium phosphate (dibasic) (K2HPO4), potassium phosphate (tribasic) (K3PO4), ammonium phosphate (monobasic) ((NH4) H2PO4), ammonium phosphate (dibasic) ((NH4)2HPO4), ammonium phosphate (tribasic) ((NH4)3PO4) and mixtures thereof. Water-soluble carbonate-based salt can be chosen from the group consisting of sodium, potassium, and ammonium-based carbonates. It should be understood that the loading of the mineral precursor used in step (v) of the process is driven by the loading of the end surface of the microcapsules, the solution conditions (including pH) and the affinity of the end surface for the mineral precursor. After step (iv), the biopolymer coating is preferably negatively charged. However, the surface of the biopolymer coating can be modified with alternating polyelectrolyte layers or adsorption of a functional coating prior to the adsorption of the mineral precursor. This modality is not limited to a single layer or a pair of opposing polyelectrolyte layers, but includes 2, 3, 4, or even more opposing polyelectrolyte layers or pairs. The charge and functionality of the last layer determines the charge and functionality of the mineral precursor added in step (v). According to one modality, the cationic polyelectrolyte layer is selected from the group consisting of poly(allylamine) hydrochloride, poly-L-lysine, and chitosan. ρζοοηη / ηζηζ / Ε / γίΛΐ According to another modality, the anionic polyelectrolyte layer is chosen from the group consisting of poly(4-sodium styrene sulfonate) (PSS), polyacrylic acid, polyethyleneimine, humic acid, carrageenan, pectin, gum arabic, and mixtures thereof. According to a particular modality, the anionic polyelectrolyte layer is PSS. Mode 1 According to one modality, the mineral precursor solution is chosen from the group consisting of an iron(II) sulfate solution or an iron(III) chloride solution. The initiation of the mineral growth process can be carried out by the in-situ addition of a precipitating species. According to this method, when the mineral precursor is an iron solution, the iron ions are adsorbed onto the anionic surface of the capping material, and the precipitating species used act as a basis for hydrolysis to form an iron oxide layer (for example, by adding a sodium hydroxide solution). The weight ratio between the precursor mineral salt in solution and the microcapsule suspension of step iv) may be between 1:1 and 2:1, preferably between 1.3:1 and 1.7:1, and most preferably between 1.5:1 and 1.6:1. The values ​​are given for pure salts in solution; the person skilled in the art may adjust the amount of salt if a hydrated form is used. Mode 2 According to one embodiment, the mineral precursor solution is chosen from the group consisting of sodium carbonate Na2CO3, calcium chloride CaCl2, dibasic sodium phosphate Na2HPO4, monobasic sodium phosphate NaH2PO4, tribasic sodium phosphate Na3PO4, calcium nitrate Ca(NO3)2. According to a particular embodiment, when calcium chloride CaCl2 or Ca(NOs)2 is used as the salt in step i) of the process, the mineral precursor, namely Na2COs or NaH2PO4, can only be added to form a mineral layer made of calcium carbonate CaCOs or calcium phosphate CaPO4, respectively. However, to improve the robustness of the coating, the microcapsules can be incubated again several times simultaneously or sequentially in the following two precursor solutions (Na2CO3 / CaC12 or NaH2PO4 / CaC12). Mode 3 According to this particular modality, the microcapsules are introduced sequentially or simultaneously into at least two solutions, each comprising at least one precursor. Preferably, the first solution comprises a water-soluble calcium-based salt including a calcium precursor (first mineral precursor of step v), and the second solution comprises a water-soluble phosphate-based salt including a phosphate precursor (second mineral precursor to induce mineral layer growth). The order of addition could change according to the selection and composition of the underlying termination layer. According to a particular modality, the first solution comprises calcium nitrate (Ca(NO3)2) and the second solution comprises sodium phosphate (dibasic) (Na2HPO4). According to another particular modality, the first solution comprises calcium chloride (CaCl2) and the second solution comprises sodium carbonate (Na2CO3). To improve the robustness of the coating, the microcapsules can be re-incubated several times simultaneously or sequentially in the two mineral precursor solutions. Mode 4 According to another method, the microcapsules are first incubated in a carbonate-based salt solution or a phosphate-based salt solution to adsorb carbonate ions CO32~ or phosphate ions PO43 respectively on the surface, followed by incubation in a calcium-based mineral solution. According to another embodiment, the first solution comprises a water-soluble carbonate-based salt that includes a carbonate precursor and the second solution comprises a water-soluble calcium-based salt that includes a calcium precursor. More specifically, according to a particular modality, the first solution comprises sodium carbonate Na2COs and the second solution comprises calcium chloride CaCl2. To improve the robustness of the coating, the microcapsules can be re-incubated several times simultaneously or sequentially in the two mineral precursor solutions. According to different modalities described above, the weight ratio between the first precursor mineral salts in solution and the microcapsule suspension of step iv) may be between 0.01:1 and 0.5:1, more preferably between 0.03:1 and 0.4:1, and the weight ratio between the second mineral precursor solution and the microcapsule suspension of step iv) may be between 0.01:1 and 0.5:1, preferably between 0.03:1 and 0.4:1. According to a particular embodiment, the weight ratio between the first precursor mineral salts in solution and the microcapsule suspension of step iv) may be between 0.1:1 and 0.5:1, preferably between 0.15:1 and 0.4:1, and the weight ratio between the second precursor mineral solution and the microcapsule suspension of step iv) may be between 0.05:1 and 0.3:1, preferably between 0.08:1 and 0.25:1. The values ​​are given for the pure salts in solution; the amount of salt may be adjusted by a person skilled in the art if a hydrated form is used. According to the different methods described above, once a mineral layer forms, the biomineralization process can be repeated with other mineral precursors to form at least a second mineral layer different from the first. Polyelectrolyte layers can form between the mineral layers. Optional exterior coating According to a particular embodiment of the invention, during or at the end of step iv) and / or after the mineralization step, a polymer selected from the group consisting of a polysaccharide, a biopolymer, a cationic polymer and mixtures thereof can also be added to the suspension of the invention to form an outer coating of the microcapsule. Polysaccharide polymers are well known to those skilled in the art. The preferred nonionic polysaccharides are selected from the group consisting of locust bean gum, xyloglucan, guar gum, hydroxypropyl guar, hydroxypropyl cellulose, hydroxypropyl methylcellulose, pectin, and mixtures thereof. According to a particular modality, the ρζοοηη / ηζηζ / Ε / γίΛΐ coating consists of a cationic coating. Cationic polymers are also well known to those skilled in the art. Preferred cationic polymers have cationic charge densities of at least 0.5 meq / g, more preferably at least approximately 1.5 meq / g, but also preferably less than approximately 7 meq / g, and more preferably less than approximately 6.2 meq / g. The cationic charge density of cationic polymers can be determined by the Kjeldahl method as described in the United States Pharmacopeia under Chemical Tests for the Determination of Nitrogen. Preferred cationic polymers are selected from those containing units comprising primary, secondary, tertiary, and / or quaternary amine groups, which may be part of the main polymer chain or supported by a side substituent directly attached to it. The weight-average molecular weight (Mw) of the cationic polymer is preferably between 10,000 and 3.5 M Dalton, more preferably between 50,000 and 2 M Dalton. According to a particular modality, cationic polymers based on acrylamide, methacrylamide, N-vinylpyrrolidone, quaternized N,N-dimethylaminomethacrylate, diallyldimethylammonium chloride, quaternized vinylimidazole (3-methyl-l-vinyl-lH-imidazole-3-io chloride), vinylpyrrolidone, acrylamidopropyltrimonium chloride, cassia hydroxypropyltrimonium chloride, guar hydroxypropyltrimonium chloride or polygalactomannan ether 2-hydroxypropyltrimethylammonium chloride, starch hydroxypropyltrimonium chloride and cellulose hydroxypropyltrimonium chloride will be used.Preferably, the copolymers shall be selected from the group consisting of polyquaternium-5, polyquaternium-6, polyquaternium-7, polyquaterniol-0, polyquaternium-11, polyquaternium-16, polyquaternium-22, polyquaternium-28, polyquaternium-43, polyquaternium-44, polyquaternium-46, cassia hydroxypropyltrimonium chloride, guar hydroxypropyltrimonium chloride or polygalactomannan ether 2-hydroxypropyltrimethylammonium chloride, starch hydroxypropyltrimonium chloride and cellulose hydroxypropyltrimonium chloride. Specific examples of commercially available products include Saleare® SC60 (acrylamide acrylamide acrylamide cationic copolymer, source: BASF) or Luviquat®, such as PQ 11N, FC 550 or Style (polyquaternium-11 to 68 or vinylpyrrolidone quaternized copolymers, source: BASF), or also Jaguar® (C13S or C17, source: Rhodia). When the coating is added after the mineralization step, depending on the surface charge of the mineralized microcapsules and the solution conditions, an anionic polyelectrolyte may first be adsorbed onto the surface, followed by the adsorption of a cationic polymer. Alternatively, a cationic polymer could be adsorbed followed by the adsorption of an anionic coating. Post-functionalization of the mineralized layer could be performed to impart greater barrier functionality, to serve as a base for greater enzymatic crosslinking, to serve as a base for greater mineralization, or to provide a differently functionalized surface to facilitate compatibility with application bases or the performance (such as deposition performance) of application bases. According to any of the preceding embodiments of the invention, an amount of polymer described above is added, comprising between approximately 0% and 5% w / w, or even between approximately 0.1% and 2% w / w, the percentage being expressed in w / w based on the total weight of the suspension obtained after step iv) or vi). A person skilled in the art will clearly understand that only a portion of the added polymers will be incorporated / deposited in the microcapsule coating. Multi-microcapsule system According to one embodiment, the microcapsules of the invention (first microcapsule suspension) can be used in combination with a second microcapsule suspension. Another object of the invention is a microcapsule delivery system comprising: the microcapsule suspension of the present invention as a first microcapsule suspension, and - a second suspension of microcapsules, wherein the microcapsules contained in the first suspension of microcapsules and the second suspension of microcapsules differ in their hydrophobic material and / or their wall material and / or their coating material and / or their mineral layer. By way of non-limiting examples, the nature of the polymeric coating of the second microcapsule suspension of the invention may vary. For example, the coating of the second microcapsule suspension may be aminoplast-based, polyurea-based, or polyurethane-based. The coating of the second microcapsule suspension may also be hybrid, namely organic-inorganic, such as a hybrid coating composed of at least two types of crosslinked inorganic particles, or even a coating resulting from the hydrolysis and condensation reaction of a polyalkoxysilane macro-monomeric composition. According to one embodiment, the coating of the second microcapsule suspension comprises an aminoplast copolymer, such as melamine-formaldehyde or ureaformaldehyde or melamine formaldehyde or crosslinked melamine glyoxal. According to another embodiment, the shell of the second microcapsule suspension is polyurea-based, made from, for example, but not limited to, isocyanate-based monomers and crosslinkers containing amines such as guanidine carbonate and / or guanazole. The preferred polyurea microcapsules comprise a polyurea wall that is the polymerization reaction product between at least one polyisocyanate comprising at least two isocyanate functional groups and at least one reagent selected from the group consisting of an amine (for example, a water-soluble guanidine salt and guanidine); a colloidal stabilizer or emulsifier; and an encapsulated perfume. However, the use of an amine may be omitted. According to one particular embodiment, the colloidal stabilizer includes an aqueous solution of between 0.1% and 0.4% poly(vinyl) alcohol, between 0.6% and 1% of a cationic copolymer of vinylpyrrolidone and a quaternized vinylimidazole (all percentages are defined by weight relative to the total weight of the colloidal stabilizer). According to another embodiment, the emulsifier is an anionic or amphiphilic biopolymer preferably selected from the group consisting of gum arabic, soy protein, gelatin, sodium caseinate, and mixtures thereof. According to another modality, the coating of the second microcapsule suspension is polyurethane-based, made of, for example, but not limited to, polyisocyanate and polyols, polyamide, polyester, etc. The preparation of an aqueous dispersion / suspension of core-shell microcapsules is well known to those skilled in the art. In one respect, the microcapsule wall material can comprise any suitable resin and especially includes melamine, glyoxal, polyurea, polyurethane, polyamide, polyester, etc. Suitable resins include the reaction product of an aldehyde and an amine; suitable aldehydes include formaldehyde and glyoxal. Suitable amines include melamine, urea, benzoguanamine, glycoluril, and mixtures thereof. Suitable melamines include methyl melamine, methylated methyl melamine, imino melamine, and mixtures thereof. Suitable ureas include dimethyl urea, methylated dimethyl urea, urea-resorcinol, and mixtures thereof. Suitable materials for manufacturing can be obtained from one or more of the following companies: Solutia Inc. (St. Louis, Missouri, USA), Cytec Industries (West Paterson, New Jersey, USA).), SigmaAldrich (St. Louis, Missouri, USA). According to one particular embodiment, the second core-shell microcapsule is a formaldehyde-free capsule. A typical process for preparing an aminoplast formaldehyde-free microcapsule suspension comprises the steps of 1) preparing an oligomeric composition comprising the reaction product of, or obtainable by co-reaction of a) a polyamine component in the form of melamine or a mixture of melamine and at least one Ci-C4 compound comprising two NH2 functional groups; (b) an aldehyde component in the form of a mixture of glyoxal, a C4-e 2,2-dialkoxyethanal and optionally a glyoxalate, wherein the mixture has a glyoxal / C4-6 2,2-dialkoxyethanal molar ratio of between 1 / 1 and 10 / 1; and c) a protic acid catalyst; 2) Prepare an oil-in-water dispersion, wherein the droplet size is between 1 and 600 µm, and comprising: i. an oil ii. a water medium iii. at least one oligomeric composition obtained in step 1; iv. at least one crosslinking agent selected from among A) aromatic or aliphatic di- or tri-isocyanates of C4-Ci2 and its biurets, triurets, trimers, trimethylolpropane adduct and mixtures thereof; and / or B) a di- or tri-oxirane compound of the formula A-(oxiran-2-ylmethyl)nen where n represents 2 or 3 and 1 represents a C2-C6 group optionally comprising 2 to 6 nitrogen and / or oxygen atoms; v. optionally a C1-C4 compound comprising two NH2 functional groups; 3) Heat the dispersion; 4) Cool the dispersion. This process is described in more detail in document WO 2013 / 068255, the contents of which are included as a reference. According to another embodiment, the coating of the second microcapsule suspension is polyurea- or polyurethane-based. Examples of processes for preparing polyurea and polyurethane-based microcapsule suspensions are described, for example, in documents WO2007 / 004166, EP 2300146, and EP2579976, the contents of which are also included by reference. Typically, a process for preparing polyurea or polyurethane-based microcapsule suspension includes the following steps: a) Dissolving at least one polyisocyanate having at least two isocyanate groups in an oil to form an oily phase; b) Prepare an aqueous solution of an emulsifier or colloidal stabilizer to form an aqueous phase; c) Adding the oil phase to the aqueous phase to form an oil-in-water dispersion, wherein the average droplet size is between 1 and 500 pm, preferably between 5 and 50 pm; d) Apply sufficient conditions to induce interfacial polymerization and form microcapsules in suspension form. Process for preparing a microcapsule powder Another object of the invention is a process for preparing a microcapsule powder comprising the steps as defined above and an additional step consisting of subjecting the microcapsule suspension obtained in step iv) or vi) to drying, such as spray drying, to provide the microcapsules as is, i.e., in powder form. It is understood that any standard method known to a person skilled in the art for carrying out such drying is also applicable. In particular, the suspension may be spray dried preferably in the presence of a polymeric carrier material such as polyvinyl acetate, polyvinyl alcohol, dextrins, natural or modified starch, gum arabic, vegetable gums, pectins, xanthan gums, alginates, carrageenans, or cellulose derivatives to provide microcapsules in powder form. ρζοοηη / ηζηζ / Ε / γίΛΐ According to a particular modality, the carrier material contains free perfume oil that may be the same as or different from the perfume of the microcapsule core. Microcapsule Suspension / Microcapsule Powder The microcapsule suspension and the microcapsule powder that can be obtained by the processes described above are also an object of the invention. Another object of the present invention is a core-shell microcapsule suspension comprising at least one microcapsule made of: - an oil-based core - optionally an inner cover made of a polymerized polyfunctional monomer; - a biopolymer coating comprising a protein, wherein at least one protein is crosslinked; and - optionally at least one outer mineral layer. All the previous methods described above for the process to prepare the microcapsule suspension also apply to the microcapsule suspension described above. The definitions of hydrophobic material, protein, polyfunctional monomer, and outer mineral layer are the same as those described above. According to the invention, the oil-based core comprises a hydrophobic material as defined above. According to one modality, the mineral layer comprises a material selected from the group consisting of iron oxides, iron oxyhydroxide, titanium oxides, zinc oxides, calcium carbonates, calcium phosphates and mixtures thereof. According to one embodiment, the mineral layer comprises a material composed of iron oxides, iron oxyhydroxide, titanium oxides, zinc oxides, calcium carbonates, calcium phosphates, and mixtures thereof. Preferably, the mineral layer is an iron oxide, an iron oxyhydroxide, or a calcium phosphate or a calcium carbonate. All crystalline minerals, amorphous minerals, and polymorphous minerals are included (such as hydroxyapatite for calcium phosphate and calcite, vaterite, and aragonite for calcium carbonate). According to a particular modality, the mineral layer is iron oxyhydroxide goethite (α-FeO(OH)). According to another model, the mineral layer is calcium phosphate. According to another theory, the mineral layer is calcium carbonate. According to another modality, several mineral layers are present comprising calcium phosphate and calcium carbonate. According to a particular modality, the microcapsules comprise an outer coating as previously described over the biopolymer cover and / or over the optional mineral layer. According to one modality, the protein is chosen from the group consisting of milk proteins, caseinate salts such as sodium caseinate or calcium caseinate, casein, whey protein, hydrolyzed proteins, gelatins, gluten, pea protein, soy protein, silk protein, and mixtures thereof. According to one modality, the protein(s) contained in the biopolymer shell consist of crosslinked protein(s). According to one embodiment, the protein comprises sodium caseinate, preferably cross-linked sodium caseinate. According to one embodiment, the protein comprises sodium caseinate and a globular protein, preferably chosen from the group consisting of whey protein, beta-lactoglobulin, ovalbumin, bovine serum albumin, vegetable proteins and mixtures thereof. The protein is preferably a mixture of sodium caseinate and whey protein. According to one embodiment, the ρζοοηη / ηζηζ / Ε / γίΛΐ biopolymer coating comprises a crosslinked protein selected from the group consisting of sodium caseinate and / or whey protein. According to a particular mode of delivery, the microcapsule suspension comprises at least one microcapsule composed of: - an oil-based core, preferably comprising a perfume oil, an inner shell made of a polymerized polyfunctional monomer; preferably a polyisocyanate having at least two isocyanate functional groups, - a biopolymer coating comprising a protein, wherein at least one protein is crosslinked; wherein the protein preferably contains a mixture comprising sodium caseinate and a globular protein, preferably whey protein, - optionally at least one outer mineral layer. According to one definition, sodium caseinate and / or whey protein are cross-linked proteins. The weight ratio between sodium caseinate and whey protein is preferably between 0.01 and 100, preferably between 0.1 and 10, more preferably between 0.2 and 5. According to another particular embodiment, the microcapsule suspension comprises at least one microcapsule composed of: ρζοοηη / ηζηζ / Ε / γίΛΐ - an oil-based core, preferably comprising a perfume oil, - a biopolymer coating comprising a protein, wherein at least one protein is crosslinked; wherein the protein is preferably a mixture comprising sodium caseinate and whey protein, - optionally at least one outer mineral layer, wherein the coating is free of polyisocyanate, preferably free of any polymerized polyfunctional monomer. The biopolymer coating may comprise a salt and a crosslinker as previously defined. It should be mentioned that, while the ideal situation would be one where the microcapsules exhibit the best stability—that is, the least active leakage during application combined with the best delivery performance, such as fragrance intensity in the case of a perfume applied both before and after rubbing—different scenarios can be very interesting depending on the application. Slightly less stable capsules with higher fragrance output can be very useful, as can more stable capsules with slightly lower fragrance output. An expert in the field can choose the best balance depending on the application's needs. ezoonn / nznz / E / YiAi Consumer products The microcapsules of the invention can be used in combination with active ingredients. Therefore, an object of the invention is a composition comprising: (i) microcapsules as defined above; (ii) an active ingredient, preferably chosen from the group consisting of a cosmetic ingredient, skin care ingredient, perfume ingredient, flavor ingredient, odor-fighting ingredient, bactericidal ingredient, fungicidal ingredient, pharmaceutical or agrochemical ingredient, disinfectant ingredient, insect repellent or attractant and mixtures thereof. The microcapsules of the invention can be used for the preparation of flavoring or aromatizing compositions that are also the subject of the invention. Perfumed consumer products The microcapsules of the invention can also be added to various scented consumer products. In particular, a perfume composition comprising (i) microcapsules as defined above; (ii) at least one perfume co-ingredient; and (iii) optionally a perfumery adjuvant, is another object of the invention. A perfume co-ingredient herein is understood to be a compound used in a perfume preparation or composition to impart a hedonic effect, and which is not a microcapsule as defined above. In other words, for a co-ingredient to be considered a perfume, it must be recognized by a person skilled in the art as capable of imparting or modifying the odor of a composition in a positive or pleasant way, and not merely as having an odor. The nature and type of perfume co-ingredients present in the perfume composition do not warrant a more detailed description here, which in any case would not be exhaustive, as the expert may select them based on their general knowledge and in accordance with the intended use or application and the desired organoleptic effect.In general terms, these fragrance co-ingredients belong to chemical classes as varied as alcohols, lactones, aldehydes, ketones, esters, ethers, acetates, nitriles, terpenoids, nitrogenous or sulfurous heterocyclic compounds, and essential oils. These fragrance co-ingredients can be of natural or synthetic origin. Many of these co-ingredients are listed in reference texts such as S. Arctander's book, *Perfume and Flavor Chemicals*, 1969, Montclair, New Jersey, USA, or its more recent versions, or in other works of a similar nature, as well as in the extensive patent literature in the field of perfumery. It is also understood that fragrance co-ingredients can also be compounds known to release various types of fragrance compounds in a controlled manner. By perfumery adjuvant, we mean an ingredient capable of imparting an additional benefit, such as color, lightfastness, chemical stability, etc. A detailed description of the nature and type of adjuvant commonly used in perfume bases cannot be exhaustive. However, it should be noted that these ingredients are well known to anyone skilled in the art. Preferably, the perfume composition according to the invention comprises between 0.1 and 30% by weight of microcapsules as defined above. The microcapsules of the invention can be used appropriately in many fields of application and in consumer products. The microcapsules can be used in liquid form for liquid consumer products, as well as in powder form for powdered consumer products. In the case of microcapsules containing a perfume oil-based core, the products of the invention may be particularly useful in perfumed consumer products such as fine fragrances or functional perfumery. Functional perfumery includes, in particular, personal care products such as hair care, body cleansing, skin care, and hygiene products, as well as household care products such as laundry and air care products. Accordingly, another object of the present invention is a perfumed consumer product comprising, as a perfume ingredient, the microcapsules defined above or a perfume composition as defined above.The perfume element of the consumer product may be a combination of perfume microcapsules as defined above and free or unencapsulated perfume, as well as other types of perfume microcapsules than those described herein. In particular, a liquid consumer product comprising: - from 2 to 65% by weight, with respect to the total weight of the consumer product, of at least one surfactant; - water or a water-miscible hydrophilic organic solvent; and - a perfume composition or microcapsules as defined above, wherein the active ingredient comprises a perfume, is another object of the invention. Also a powdered consumer product comprising - from 2 to 65% by weight, with respect to the total weight of the consumer product, of at least one surfactant; and - a perfume composition or microcapsules, in ρζοοηη / ηζηζ / Ε / γίΛΐ where the active ingredient comprises a perfume as defined above is part of the invention. According to a particular modality, the process of preparing the microcapsules contained in the perfumed consumer product comprises the addition of a polyisocyanate to the oil phase to improve stability in challenging bases comprising a large number of surfactants. Therefore, the microcapsules of the invention can be added as such or as part of a perfume composition of the invention in a perfumed consumer product. For the sake of clarity, it should be mentioned that a perfumed consumer product is understood to be a consumer product that is expected to offer, among other benefits, a perfumed effect on the surface to which it is applied (e.g., skin, hair, textiles, paper, or household surfaces) or in the air (air freshener, deodorant, etc.). In other words, a perfumed consumer product according to the invention is a manufactured product comprising a functional formulation, also called a base, along with beneficial agents, including an effective quantity of microcapsules according to the invention. The nature and type of the other constituents of the perfumed consumer product do not warrant a more detailed description here, which in any case would not be exhaustive, as the expert can select them based on their general knowledge and in accordance with the nature and desired effect of the product. Basic formulations of consumer products into which the microcapsules of the invention can be incorporated can be found in the abundant literature relating to such products. These formulations do not merit a detailed description here, which in any case would not be exhaustive. The expert in the art of formulating consumer products can perfectly well select the appropriate components based on their general knowledge and the available literature. Non-limiting examples of a suitable perfumed consumer product may include a perfume, such as a fine perfume, cologne, aftershave lotion, or body splash; a fabric care product, such as a liquid or solid detergent, tablets and capsules, fabric softener, dryer sheet, fabric refresher, ironing water, or bleach; a personal care product, such as a hair care product (e.g., shampoo, hair conditioner, coloring preparation, or hairspray), a cosmetic preparation (e.g., removal cream, body lotion, or deodorant or antiperspirant), or a skin care product (e.g., perfumed soap, shower or bath foam, body gel, oil or gel, bath salts, or a hygiene product); ρζοοηη / ηζηζ / Ε / γίΛΐ an air care product, such as an air freshener or a ready-to-use powder air freshener; or a household care product, such as multi-purpose cleaners, liquid or powder dishwashing products or tablets, toilet cleaners or products for cleaning various surfaces, for example, sprays and wipes for treating / refreshing textiles or hard surfaces (floors, tiles, stone floors, etc.); a hygiene product, such as sanitary napkins, diapers, toilet paper. Another object of the invention is a consumer product comprising: - an active self-care base, and - microcapsules as defined above or the perfume composition as defined above, where the consumer product is in the form of a personal care composition. The active base for personal care products into which the microcapsules of the invention can be incorporated can be found in the extensive literature relating to such products. These formulations do not warrant a detailed description here, which in any case would not be exhaustive. A person skilled in the art of formulating consumer products can perfectly select the appropriate components based on their general knowledge and the available literature. ρζοοηη / ηζηζ / Ε / γίΛΐ The personal care composition is preferably chosen from the group consisting of a hair care product (e.g., shampoo, hair conditioner, coloring preparation or hairspray), a cosmetic preparation (e.g., removal cream, body lotion or deodorant or antiperspirant), or a skin care product (e.g., perfumed soap, shower or bath foam, bath gel, oil or gel, bath salts or a hygiene product) or a fine fragrance product (e.g., Eau de Toilette (cologne) - EdT). Another object of the invention is a consumer product comprising: - an active base of home care or fabric care, and - microcapsules as defined above or the perfume composition as defined above, wherein the consumer product is in the form of a home care or fabric care composition. In the extensive literature relating to such products, one can find bases for household or fabric care products into which the microcapsules of the invention can be incorporated. These formulations do not warrant a detailed description here, which in any case would not be exhaustive. A person skilled in the art of formulating consumer products can perfectly select the appropriate components based on their general knowledge and the available literature. The composition for household or fabric care is preferably chosen from the group consisting of fabric softener, liquid detergent, powdered detergent, liquid fragrance enhancer, and solid fragrance enhancer. According to a particular modality, the consumer product is presented in the form of a fabric softening composition and comprises: - between 85 and 99.9% of a softening active base; - between 0.1 and 15% by weight, more preferably between 0.2 and 5% by weight of the microcapsule suspension of the invention. The active fabric softener base may comprise quaternary ammonium cationic surfactants, such as diethyl ester dimethyl ammonium chloride (DEEDMAC), TEAQ (triethanolamine quat), HEQ (Hamburg esterquat). According to a particular modality, the consumer product is presented in the form of a perfume composition comprising: 0.1 to 20% of microcapsules as defined above, - 0 to 40%, preferably 3-40% perfume, and ρζοοηη / ηζηζ / Ε / γίΛΐ - 20-90, preferably 40-90% ethanol, by weight, based on the total weight of the perfume composition. Preferably, the consumer product comprises from 0.1 to 15% by weight, more preferably from 0.2 to 5% by weight, of the microcapsules of the present invention, where these weight percentages are defined with respect to the total weight of the consumer product. Of course, the above concentrations may be adjusted according to the desired beneficial effect in each product. Flavored consumer products The microcapsules of the invention, by encapsulating a flavor, can be used in a wide variety of edible end products. Consumer products that can be flavored by the microcapsules of the invention may include foods, beverages, pharmaceuticals, and the like. For example, the basis of a food product that could use the suspensions or powdered microcapsules of the invention includes: • Baked goods (e.g., bread, cookies, cakes, other baked goods), • Non-alcoholic beverages (e.g., carbonated soft drinks, bottled water, sports / energy drinks, juices, vegetable juices, vegetable juice preparations), • Alcoholic beverages (e.g., beer and malt beverages, alcoholic beverages), • Instant beverages (e.g., instant plant-based drinks, powdered soft drinks, instant coffee and tea), • Cereal products (e.g., breakfast cereals,precooked and prepared rice products, rice flour products, millet and sorghum products, raw or precooked noodles and pasta products), • Dairy products (e.g., fresh cheese, soft cheese, hard cheese, dairy drinks, whey, butter, products containing partially or fully hydrolyzed milk proteins, fermented dairy products, condensed milk and analogues), • Dairy products (e.g., fruit or flavored yogurt, ice cream, fruit ice cream), • Confectionery products (e.g., chewing gum, hard and soft candies), • Chocolate and composite coatings, • Products based on fat and oil or emulsions thereof (e.g., mayonnaise, spreads, margarines, butter, remoulade, dressings, spice preparations), • Seasoned, marinated or processed fish products (e.g., fish sausage, surimi), • Eggs or egg products (dehydrated egg, egg white, egg yolk,Custards), • Desserts (e.g., jellies and puddings) • Products made with soy protein or other soy fractions (e.g., soy milk and products made from it, preparations containing soy lecithin, fermented products such as tofu or tempeh or products made from them, soy sauces), • Vegetable preparations (e.g., tomato sauce, sauces, processed and reconstituted vegetables, dried vegetables, frozen vegetables, precooked vegetables, pickled vegetables, vegetable concentrates or pastes, cooked vegetables, potato preparations), • Vegetarian meat substitute, vegetarian burger • Spices or spice preparations (e.g., mustard preparations, horseradish preparations), spice mixtures and, in particular, seasonings used, for example, in the field of snacks. • Snack products (e.g., baked or fried potato chips or potato dough products, bread dough products, extruded products based on corn, rice, or ground nuts), • Meat products (e.g., processed meat, poultry, beef, pork, ham, fresh sausages or raw meat preparations, seasoned or marinated fresh meat or cured meat products, reformed meat), ρζοοηη / ηζηζ / Ε / γίΛΐ Prepared dishes (e.g., instant noodles, rice, pasta, pizza, tortillas, burritos) and soups and broths (e.g., broth, salt cubes, dry soups, instant soups, precooked soups, retort soups), sauces (instant sauces, dehydrated sauces, prepared sauces, topping sauces, sweet sauces). • Oral care products (toothpastes, tooth powders, flavored dental floss, mouthwashes...) Preferably, the microcapsules according to the invention shall be used in selected products from the group consisting of baked goods, instant beverages, cereal products, dairy products, products based on fats and oils or emulsions thereof, desserts, vegetable preparations, vegetarian meat substitute, spices and seasonings, snacks, meat products, prepared dishes, soups and broths, and sauces. The invention will now be described in more detail by means of examples. It will be appreciated that these examples do not intend for the claimed invention to be limited in any way. Examples Example 1 Preparation of microcapsules using the process of the invention (calcium carbonate as a mineral layer) The AD microcapsules were prepared according to the following protocol. 1) Sodium caseinate is dissolved in DI water at RT. 2) Calcium chloride (aqueous solution) is slowly added to the sodium caseinate solution and stirred at TA for -15 min. 3) The emulsifying solution is combined with a perfumed oil (see table 1) containing a polyisocyanate (Takenate® D-110N) and homogenized (18,000 rpm for 3 min). 4) The emulsion is then transferred to a reactor, the pH is adjusted to -6.5 c / NaOH and it is heated to 45°C. 5) Transglutaminase (aqueous solution) is added to the reactor and stirred for 3 hours at 45°C. 6) The reactor is then heated to 70°C and held for 30 min before being cooled to TA. Some microcapsules were further mineralized with calcium carbonate (CaCO3) by adding Na2CO3 / CaCl2 respectively according to the following protocol. 1) 20 g of the microcapsule suspension were added to 180 g of deionized water and stirred at room temperature (250 rpm, 25°C) 2) 13.6 mL of 0.1 M Na2CO3 was slowly added for 1 hour (0.23 mL / min) and then stirred for 1 hour. 3) 13.6 mL of 0.1 M CaCl2 was slowly added over 1 hour (0.23 mL / min) and then stirred for 1 hour. ρζοοηη / ηζηζ / Ε / γίΛΐ 4) Repeated additions of Na2COs and CaCl23 times more ρζοοηη / ηζηζ / E / γίΛΐ (4 cycles in total) Table 1: Composition of perfume oil A Ingredient Parts Isopropyl myristate 0.3 (Z)-3-hexen-l-ol butyrate 0.6 Delta damascene 1.0 2,4-Dimethyl-3-cyclohexene-l- 1.0 carbaldehyde Habanolide® υ 3.0 Hedione® 2) 5.0 Hexyl cinnamic aldehyde 12.0 Iso E Super ®3) 16.0 Verdill acetate 24.0 Lilial ®4) 37.0 1) Registered trademark of Firmenich; pentadecenolide, origin: Firmenich SA, Geneva, Switzerland 2) Firmenich trademark; methylcis-3-oxo-2-pentyl-l-cyclopentane acetate, origin: Firmenich SA, Geneva, Switzerland 3) IFF Trademark; 7-acetyl, 1,2,3,4,5,6,7,8-octahydro-l,1,6,7-tetramethyl naphthalene 4) Registered trademark of Givaudan; 3-(4-tert-butylphenyl)-2-methylpropanal ρζοοηη / ηζηζ / Ε / γίΛΐ Table 2: Microcapsule compositions Components ABCD Sodium caseinate Na2CO3 0 3.0 0 3.0 CaCh 0 2.9 0 2.9 1) Ramsen Food and Dairy Products LLC 2) See Table 1 3) Xylene diisocyanate trimethylol propane adduct, source: Mitsui Chemicals, Inc., Japan 4) Origin of Activa TI®: Ajinomoto Example 2 Preparation of microcapsules using the process of the invention (calcium phosphate as a mineral layer) Microcapsules were prepared using the same protocol as in example 1 except that the biomineralization step comprises the following steps. 1) 15 g of the microcapsule suspension were added to 135 g of NH4OH / NH4CI buffer solution (pH 9) and stirred at room temperature (250 rpm, 25°C) 2) 17 mL of dibasic sodium phosphate were added 0.18 M (Na2HPO4) for 1 hour (283 gL / min) 3) It was shaken for 1 hour 4) 7.5 mL of 0.3 M calcium nitrate (Ca(NO3)2) and 7.5 mL of 0.18 M sodium phosphate were added simultaneously for 1 hour (125 gL / min each). 5) It was shaken for 1 hour 6) 30 mL of 0.3 M calcium nitrate (Ca(NO3)2) and 30 mL of 0.18 M sodium phosphate were added simultaneously for 1 hour (500 gL / min each) 7) It was shaken for 1 hour 8) Steps 6-7 were repeated once more Example 3 Stability performance in a shower gel composition Table 3: Composition of the shower gel ezoonn / nznz / E / YiAi Ingredients Quantity (% Weight) Deionized Water 49.35 EDETA B Powder1-* 0.05 Carbopol® Aqua SF-12 Polymer 6.00 Zetesol AO 328 U3 35.00 20% Sodium Hydroxide Aqueous Solution 1.00 Tego® Betain F 504 8.00 Kathon CG 0.10 40% Citric Acid Aqueous Solution 0.50 1) Tetrasodium EDTA; origin: BASF 2) Acrylates copolymer; origin: Noveon 3) Pareth sodium sulfate C12-C15; source: Zschimmer & Schwarz 4) Methylchloroisothiazolinone and methylisothiazolinone; Origin: Rohm & Haas Preparing the base for shower gel In a beaker, deionized water is added, followed by EDETA B powder with stirring. Carbopol Aqua SF-1 polymer and Zetesol AO 328 U are added to the reaction mixture. The pH is adjusted with sodium hydroxide solution. Tego® Betain F 50, Kathon CG, and citric acid solution are added to obtain the shower gel base (pH = 6.0-6.3, Viscosity: 5000-6000 cPs, LV spindle 3, speed 12). The capsules of the present invention were dispersed in the shower gel base described in Table 3 to obtain an encapsulated perfume oil concentration of 0.20%. The samples were then aged at 37 °C for 1 week to serve as an accelerated stability assessment. Protocol for stability assessment One gram of sample is weighed into a vial with a 20 ml headspace and sealed with a baffle. The sample is equilibrated for 10 minutes at 65°C. The SPME fiber is exposed to the vapor phase for 20 minutes at 65°C. The SPME fiber is desorbed in a standard GC injector (without a divider) for 5 minutes at 250°C. The components are then analyzed using an Agilent GCMS (5977B MSD, 7890B GC) or equivalent. All samples are compared to a reference control of free oil corresponding to 100% leakage. Results The results are shown in Figure 1. It can be concluded from these results that even with the limited amount of polyisocyanate, the microcapsules of the invention exhibit significant encapsulation and stabilization of the fragrance. The capsules retain a significant amount of oil after incubation in hard, complex application formulations for 1 week at 37°C, serving as an accelerated stability test indicative of longer-term stability and performance. Stability results are plotted against the equivalent load of free perfume oil in the shower gel. Example 4 Stability performance in a fabric softening composition The capsules of the present invention were dispersed in the fabric softener base described in Table 4 to obtain a concentration of encapsulated perfume oil of 0.20% and the stability was evaluated after 1 week at the elevated temperature of 37 °C. Table 4: Composition of fabric softener ρζοοηη / ηζηζ / Ε / γίΛΐ Product Weight % Stepantex VL 90A 8.88 Calcium Chloride Solution 10% 0.36 Proxel GXL 0.04 Perfume 1 Water 89.72 TOTAL 100 The results are shown in Figure 2. It can be concluded from these results that even with the limited amount of polyisocyanate, the microcapsules of the invention exhibit significant encapsulation and stabilization of the fragrance. The capsules retain a significant amount of oil after incubation in tough, complex application formulations for 1 week at 37°C, serving as an accelerated stability test indicative of longer-term stability and performance. Stability results are plotted against the equivalent load of free perfume oil in the fabric softener. Example 5 Olfactory performance in a soothing composition On a 76 x 127 mm (3 x 5 in) blotting paper, 0.15 g of product (fabric softener loaded with 0.2% encapsulated oil and aged for 2 weeks at 37 °C) was applied evenly to the surface. The blotting paper was air-dried for 24 hours before evaluation. The fragrance intensity was initially evaluated (before rubbing) and then again after rubbing the blotting paper 3 times (after rubbing). Evaluation scale: = odorless; 2 = just noticeable; 3 = weak; 4 = moderate; 5 = strong; 6 = very strong; 7 = extremely strong Results The intensity of perfume perception on paper blotters treated with the microcapsules was evaluated by a panel of 11 trained panelists. They were asked to rate the intensity of perfume perception on a scale of 1 to 7, where 1 means no odor and 7 means a very strong odor. As can be seen in Figure 3, the microcapsules of the invention demonstrate a significant bursting effect and fragrance intensity after rubbing. ezoonn / nznz / E / YiAi The low intensity of the pre-rubbing and the high olfactory signal even after aging the capsule suspension in the application bases for 2 weeks at the elevated temperature of 37°C is a good indicator of stability, oil retention and performance. Example 6 Preparation of microcapsules using the process of the invention A protocol similar to that described in Example 1 was applied to prepare E microcapsules with a composition as indicated in Table 6 below. A different perfume oil (Perfume B, Table 5) and a different concentration of polyisocyanate (0.6) were used. Table 5: Composition of perfume oil B ρζοοηη / ηζηζ / Ε / γίΛΐ Ingredient Parts Ethyl 2-Methylpentanoate3.2 Eucalyptol7.8 Aldehide CIO0.75 2,4-Dimethyl-3-cyclohexene-l-carbaldehyde0.75 Citronellyl nitrile4.3 Isobornyl acetate 3.0 Verdox2)9.8 Citronellyl acetate 1.3 2-methylundecanal 3.0 Diphenyl oxide 0.8 C12 aldehyde 1.3 Dicyclopentadiene acetate 9.85 beta lonone 3.3 Gamma undecalactone 18.75 Hexyl salicylate 15.9 Benzyl salicylate 16.2 1) Origin: Firmenich SA, Geneva, Switzerland 2) Registered trademark of IFF; 2-tert-butyl1-cyclohexyl acetate Example 7 Preparation of microcapsules using the process of the invention The FJ microcapsules were prepared according to the following protocol. 1) Sodium caseinate and / or whey protein is dissolved in DI to TA water. 2) Calcium chloride (aqueous solution) is slowly added to the protein solution and stirred at room temperature for ~15 min. 3) The emulsifying solution is combined with a perfumed oil (see table 5) containing a polyisocyanate (Takenate® D-110N) and homogenized (10,000 rpm for 2 min). 4) The emulsion is then transferred to a reactor, the pH is adjusted to ~6.5 c / NaOH and it is heated to 45°C. 5) Transglutaminase (aqueous solution) is added to the reactor and stirred for 3 hours at 45°C. 6) The pH is adjusted to -5.4 c / HCl and then heated to 85°C 7) The reactor is stirred at 85°C for 60 min before cooling to TI. ρζοοηη / ηζηζ / Ε / γίΛΐ Table 6: Microcapsule compositions Components EFGHIJ Sodium caseinate1) 2.5 1.875 1.25 0.625 0 1.25 Whey protein2) 0 0.625 1.25 1.875 2.5 1.25 CaC12.2H2O 0.5 0.5 0.5 0.5 0.5 0.5 Perfume B3) 30 30 30 30 30 30 Takenate D-110N4) 0.6 0.6 0.6 0.6 0.6 0 Transglutaminase5) 1.0 1.0 1.0 1.0 1.0 1.0 5) Ramsen Food and Dairy Products LLC 6) Agropur Dairy Cooperative 7) See table 5 8) Xylene diisocyanate trimethylol propane adduct, source: Mitsui Chemicals, Inc., Japan 9) Activa TI® origin: Ajinomoto Example 8 Preparation of microcapsules using the process of the invention (calcium phosphate as a mineral layer) The KM microcapsules were prepared using the same protocol as in example 7 with a biomineralization step that is the same protocol as in example 2. ρζοοηη / ηζηζ / Ε / γίΛΐ Table 7: Microcapsule compositions Components KLMNO Sodium Caseinate1) 1.25 0.625 1.25 2.5 0 Whey Protein2) 1.25 1.875 1.25 0 2.5 CaCl2.2H2O 0.5 0.5 0.5 0.5 0.5 Perfume B3) 30 30 30 30 30 Takenate D110N4) 0.6 0.6 0 0.6 0.6 Transglutaminase5) 1.0 1.0 1.0 1.0 1.0 Na2HPO4 17.7 17.7 17.7 17.7 17.7 Ca(NO3)2 33.5 33.5 33.5 33.5 33.5 1) Ramsen Food and Dairy Products LLC 2) Agropur Dairy Cooperative 3) See table 5 4) Xylene diisocyanate trimethylol propane adduct, source: Mitsui Chemicals, Inc., Japan 5) Activa TI® origin: Ajinomoto Example 9 Stability performance in a fabric softening composition Capsules of the present invention were dispersed in the fabric softener base described in Table 4 to obtain a concentration of encapsulated perfume oil 0.20% and stability was evaluated after 1 month at the elevated temperature of 37°C. Protocol for stability assessment One gram of sample is weighed into a 20 mL scintillation vial. Four milliliters of water are added and the mixture is stirred for 5 minutes at 480 rpm on an IKA KS130 orbital shaker. Five milliliters of extraction solvent (90% isooctane / 10% ether with 150 ppm 1,4-dibromobenzene) are added and stirred for 15 minutes at 480 rpm on an IKA KS130 orbital shaker. The mixture is transferred to a 15 mL centrifuge tube and centrifuged for 60 minutes at 6000 rcf. The supernatant is analyzed using an Agilent GCMS (5977B MSD, 7890B GC) or equivalent. All samples are compared to a reference control of oil-free material corresponding to 100% leakage. The results are shown in Figure 4. Figure 4 shows that even with the limited amount of polyisocyanate, the microcapsules of the invention exhibit significant encapsulation and stabilization of the fragrance oil. The capsules retain a significant amount of oil after incubation in hard and complex application formulations for 1 month at 37°C, serving as an accelerated stability test indicative of longer-term stability and performance. The stability results are plotted against the equivalent load of free perfume oil in fabric softener applications. Furthermore, these results show that the FH microcapsule, which combines sodium caseinate and whey protein, exhibits the best leakage stability. Example 10 Olfactory performance in a soothing composition A load of towels (24) was washed with 36 g of unscented detergent followed by 15 g of fabric softener loaded with 0.116% encapsulated oil (perfume B) from capsules E, F, G, or H, and the towels were air-dried for 24 hours. Panelists evaluated their own set of towels and rated the fragrance intensity before and after washing on a marked anchored linear scale. Evaluation scale: = odorless; 2 = just noticeable; 3 = weak; 4 = moderate; 5 = strong; 6 = very strong; 7 = extremely strong Results The intensity of the perfume perception on dry towels treated with the microcapsules was evaluated by a panel of 18 trained panelists. They were asked to rate the intensity of the perfume perception on a scale of 1 to 7, where 1 means no smell and 7 means a very strong smell. As can be seen in Figure 5, the microcapsules of the invention demonstrate a significant bursting effect after rubbing. The low intensity of the pre-rubbing and the high olfactory signal even after aging of the capsule suspension in the application base at the elevated temperature of 37 °C is a good indication of stability, oil retention, and performance. Example 11 Spray-dried capsules The N microcapsules were spray-dried using a laboratory-scale Büchi B-290 Mini Spray Dyer, aspirated with compressed air at a rate set between 70% and 90% of the maximum aspiration rate, and an inlet temperature set at 200°C. Approximately 50–200 g of rinsed and condensed microcapsule suspension was pumped into the spray dryer at a pumping rate set to 5–15% of the maximum pumping rate. Once all the suspension had been pumped into the system, the spray dryer was cooled and the dried powder was collected. Example 12 Capsule characterization To image the microcapsules, dilute capsule suspensions were dried onto carbon tape, which was adhered to aluminum stubs and then sputter-coated with a gold / palladium plasma. The stubs were placed in a scanning electron microscope (JEOL 6010 PLUS LA) for analysis. Images of the K, N, and O mineralized capsules are shown in Figures 6, 7, and 8, respectively, to illustrate that rough, robust, and stable mineralized microcapsules can be generated by growing a spinulose mineral coating on smooth polyurea microcapsule scaffolds. In contrast, the E capsules in Figure 9 have a smooth, unmodified surface. Figure 10 shows a spray-dried version of capsule N. Figure 11 shows a J capsule without polyisocyanate. Example 13 Olfactory performance in an antiperspirant roll-on composition The capsules are incorporated at the required dose (corresponding to a 0.20% encapsulated perfume oil) in the following composition. ρζοοηη / ηζηζ / Ε / γίΛΐ Table 8: Composition of antiperspirant roll-on Ingredients Quantity (% Weight) Steareth-2 3.25 Steareth-21 0.75 Stearyl ether PPG-15 4 Deionized water 52 Aluminum chlorohydrate (50% aqueous solution) 40 On a 76 x 127 mm (3 x 5 in) blotting paper, 0.15 g of product (AP roll-on base loaded with 0.2% encapsulated oil) was applied evenly to the surface. The blotting paper was air-dried for 24 hours before evaluation. The fragrance intensity was initially evaluated (before rubbing) and then again after rubbing the blotting paper three times (after rubbing). Evaluation scale: = odorless; 2 = just noticeable; 3 = weak; 4 = moderate; 5 = strong; 6 = very strong; 7 = extremely strong Results The intensity of perfume perception on blotters treated with the microcapsules was evaluated by a panel of 14 trained panelists. They were asked to rate the intensity of perfume perception on a scale of 1 to 7, where 1 means no odor and 7 means a very strong odor. As can be seen in Figure 12, the microcapsules of the invention demonstrate a significant bursting effect after rubbing. The low intensity of the prior rubbing and the high olfactory signal are good indications of stability, oil retention, and performance. Example 14 Olfactory performance in a leave-in hair conditioner composition Table 9: Composition of leave-in conditioner ρζοοηη / ηζηζ / Ε / γίΛΐ Ingredients Quantity (% Weight) Water 95.5 Saleare SC 91 1 Aculyn 46 1 Wacker-Belsil DMC 6038 0.5 Phenonip 0.5 Mirasil ADM-E 1.5 Hair sample treatment and sensory evaluation protocol (without rinsing) The capsules are added to the required dose (corresponding to 0.20% encapsulated perfume oil) in the base and left to stand with vigorous stirring at room temperature. Clean, dry 10 g hair samples are moistened with warm tap water at 37°C for 30 seconds. 2.5 g of unscented shampoo is applied to each hair sample and lathered for 30 seconds before rinsing for 30 seconds (15 seconds per side of the sample) with warm running water directed at the top of the hair sample mount (flow rate = 4 L / min). Excess water is gently squeezed out. Then, 1 g of leave-in product is applied to each hair strand, gently rubbed in, and evenly distributed with gloved hands for 1 minute. The hair sample is then combed before being placed on a drying rack to air dry.The hair strands or samples are evaluated after 24 hours by expert panelists using an intensity scale of 1 to 7 as follows: 1) Imperceptible; 2) Slightly perceptible; 3) Weak; 4) Medium; 5) Sustained; 6) Intense; 7) Very intense. Evaluation scale: = odorless; 2 = merely perceptible; 3 = faint; = moderate; 5 = strong; 6 = very strong; 7 = extremely strong. Results The intensity of the perfume perception on dry towels treated with the microcapsules was evaluated by a panel of 15 trained panelists. They were asked to rate the intensity of the perfume perception on a scale of 1 to 7, where 1 means no smell and 7 means a very strong smell. As can be seen in Figure 13, the microcapsules of the invention demonstrate an explosion effect ρζοοηη / ηζηζ / E / γίΛΐ 100 significant after rubbing. The low intensity of the previous rubbing and the high olfactory signal is a good indication of stability, oil retention and performance. Example 15 Addition of a cationic coating to the capsules of the invention The process for preparing microcapsules P and Q corresponds respectively to the process for preparing microcapsules H and L except that an additional step of adding a cationic copolymer, namely acrylamide / acrylamide chloride copolymer (Saleare® SC60, sourced from BASF) (3 wt% in water) has been carried out at the end of the Γζοοηη / ηζηζ / Β / γι process. Table 10: Composition of the microcapsules Components PQ Sodium Caseinate1) 0.625 0.625 Whey Protein2) 1.875 1.875 CaCl2.2H2O 0.5 0.5 Perfume B3) 30 30 Takenate D1 10N4) 0.6 0.6 Transglutaminase3) 1.25 0.625 Na2HPO4 0 17.7 Ca(NO3)2 0 33.5 Saleare® SC606) 1.5 1.5 101 1) Ramsen Food and Dairy Products LLC 2) Agropur dairy cooperative 3) See table 5 4) Trimethylol propane adduct of xylylene diisocyanate, origin: Mitsui Chemicals, Inc., Japan 5) Active TI® origin: Ajinomoto 6) acrylamidopropyltrimonium chloride / acrylamide copolymer; origin BASF Example 16 Olfactory performance in a shampoo composition that is enj uated Table 11: Rinsing shampoo formulation ρζοοηη / ηζηζ / Β / γι Ingredients Quantity (% Weight) Deionized water 45.97 EDETA B POWDER 0.05 JAGUAR C14 S 0.05 UCARE POLYMER JR-400 0.075 NaOH (10% aqueous solution) 0.30 SULFETAL LA BE 34.00 ZETESOL LA 9.25 TEGOBETAINE F-50 2.00 XIMETER MEM-1691 2.50 102 CETYL ALCOHOL 1.20 COMPERLAN 100 1.50 CUTINA AGS 2.00 KATHON CG 0.10 PANTHENOL 75% 0.10 DEIONIZED WATER 0.30 SODIUM CHLORIDE 25% (aqueous solution) 0.60 Γζοοηη / ηζηζ / Β / γι Hair sample treatment and sensory evaluation protocol (rinse) The capsules are added at the required dose (corresponding to a 0.5% encapsulated perfume oil) to the rinse base with agitation of the sample at room temperature. Clean, dry 10 g hair samples are moistened with warm tap water at 37°C for 30 seconds. One g of the rinse-out product is applied to each strand of hair, gently rubbed in, and evenly distributed using gloved hands. To rinse the hair samples, they are rinsed twice using a sequential beaker wash involving immersing and fanning the hair sample in clean warm water three times per motion, followed by a 30-second rinse (15 seconds per side of the beaker). 103 samples) under warm running water directed at the top of the hair sample mount (flow rate = 4 L / min). The hair samples are not wrung dry. The sample application, distribution, and rinsing are repeated a second time before placing the hair samples on a rack to air dry. The hair strands or samples are evaluated after 24 hours by expert panelists using an intensity scale of 1 to 7 as follows: 1) Imperceptible; 2) Slightly perceptible; 3) Weak; 4) Medium; 5) Sustained; 6) Intense; 7) Very intense. Evaluation scale: = odorless; 2 = merely perceptible; 3 = faint; = moderate; 5 = strong; 6 = very strong; 7 = extremely strong Results The intensity of the perfume perception on dry towels treated with the microcapsules was evaluated by a panel of 16 trained panelists. They were asked to rate the intensity of the perfume perception on a scale of 1 to 7, where 1 means no smell and 7 means a very strong smell. As can be seen in Figure 14, the microcapsules of the invention demonstrate a significant bursting effect after rubbing. The low intensity of the prior rubbing and the high olfactory signal are good Γζοοηη / ηζηζ / Β / γι 104 indication of stability, oil retention and performance. Example 17 Hair deposition test For deposition quantification, the following procedure was used. A 500 mg hair mini-sample was moistened with 40 mL of tap water (37–39°C) directed onto the mount using a 140 mL syringe. Excess water was gently squeezed out once, and 0.1 mL of a model surfactant mixture containing UV tracer-loaded microcapsules (Uvinul A Plus) was applied using a 100 pL positive displacement pipette. The surfactant mixture was distributed with 10 horizontal and 10 vertical passes. The sample was then rinsed with 100 mL of tap water (37–39°C), and 50 mL was applied to each side of the sample directed onto the mount. Excess water was gently squeezed out, and the hair sample was then cut into a pre-weighed 20 mL scintillation vial. This process was repeated 2 more times and then the vials containing the cut hair were dried in a vacuum oven at 50-60°C (100 Torr) for at least 5 hours.After the drying process, the vials were reweighed to determine the mass of the hair in the vials. Controls were also prepared by adding 0.1 mL of the model surfactant mixture containing capsules to an empty vial. Then, 4 mL of 200-grade ethanol were added to each vial and subjected to 60 minutes of drying. 105 sonication. After sonication, the samples were filtered through a 0.45 pm PTFE filter and analyzed by HPLC using a UV detector. To determine the percentage of microcapsule deposition of a model surfactant mixture, the amount of Uvinul extracted from the hair samples was compared with the amount of Uvinul extracted from the control samples. Table 12: Composition model of the surfactant mixture ezoQnn / nznz / E / Yii Ingredients Active Amount (% Weight) Function Sodium Laureth Sulfate (SLES) 12 Anionic Surfactant Cocamidopropyl Betaine (CAPB) 3 Amphoteric Surfactant Saleare® SC 60 Polymer 1)1} 0.5 Deposition Aid Water 84.5 Solvent 1) acrylamide / acrylamide / acrylamide chloride copolymer; source BASF Results Deposition on hair strands was measured using this simplified model surfactant mixture, intended to be representative of personal care formulations such as shampoo or shower gel. The results are shown in Figure 15. The data illustrated in Figure 15 demonstrate that 106 The capsules according to the invention (Capsules E, G and H) deposit a quantifiable amount of fragrance oil onto hair strands from a mixture of model surfactants and that the addition of a mineral layer to these capsules, according to the invention (Capsules N, K and L, respectively) increases the deposition of oil onto the hair strands up to five times. Example 18 Stability of mineral coating in hydrogen peroxide for oral care applications The stability protocol was as follows: 100 mg of microcapsule suspension were introduced into 10 mL of a hydrogen peroxide solution with pH adjusted to 6.5 and gently shaken before incubating the samples for one month at 22°C. The microcapsules were then observed using scanning electron microscopy to determine if any physical deterioration of the mineral coating was present. Figure 16 demonstrates that the external mineral coating is unaffected by the pH or hydrogen peroxide content found in many oral care applications. Example 19 Composition of rinse-out conditioner Perfumed H microcapsules were added to the previous rinse composition. 10 g samples of Caucasian brown hair, 20 cm in length, were used. 107 hair samples were secured with a flat metal clip. Caucasian hair with flat strands was chosen for this evaluation because Caucasian hair has a relatively thin diameter, ensuring more reproducible application of viscous conditioning compositions compared to thick, coarse Asian hair. The hair samples were rinsed with warm running water (37°C), and excess water was manually squeezed out. One gram of the rinse product was applied to the sample and distributed manually for 30 seconds, using nitrile gloves. The samples were then air-dried on a drying rack for 24 hours. Olfactory evaluation was conducted by a panel of eight panelists on the dried samples before and after styling. Intensity was reported on a scale of 1 to 7 (1 = no odor, 7 = maximum odor intensity). The average of the eight panelist evaluations is reported. Table 13: Composition of rinse-out conditioner ezoQnn / nznz / E / Yii Ingredients Concentration [Weight%] A Deionized water 81.8 Behentrimonium chloride 2.5 Hydroxyethylcellulose2) 1.5 108 B Cetearyl alcohol 3) 4 Glyceryl stearate (and) PEG-100 stearate 4) 2 Behentrimonium methosulfate (and) cetyl alcohol (and) butylene glycol 5) 4 Ethoxy (20) Stearyl alcohol 6) 1 C Amodimethicone (and) Trideceth-12 (and) Cetrimonium chloride 7) 3 Chlorhexidine digluconate 8) 20% aqueous solution 0.2 D 10% aqueous citric acid solution to pH 3.5-4 qs TOTAL: 100 1) Genamin KDMP, Clariant 2) Tylose H10 Y G4, Shin Etsu 3) Lanette O, BASF 4) Arlacel 165, Croda 5) Incroquat Behenyl TMS-50-PA- (MH), Croda 6) Brij S20, Croda 7) Xiameter MEM-949, Dow Corning 8) Alpha Aesar The ingredients of Phase A are mixed until a uniform mixture is obtained. The Tylose is allowed to dissolve completely. The mixture is then heated to 70-75°C. The ingredients of Phase B are combined and melted at 70-75°C. 109 The ingredients of Phase B are then added to Phase A with good stirring and mixing continues until it cools to 60°C. The ingredients of Phase C are then added while stirring and the mixture is kept at this temperature until it cools to 40°C. The pH is adjusted with a citric acid solution to pH 3.5–4.0. Table 14: Olfactory behavior in a rinse-off composition ρζοοηη / ηζηζ / Β / γι Before styling After styling 0.7% Capsules H 3 6 It can be observed in Table 14 that the microcapsules according to the invention show a rubbing effect. Example 20 Liquid detergent composition A sufficient quantity of H microcapsules (0.19 g) was weighed and mixed into a 35 g dose of liquid detergent (Table 15) to add the equivalent of 0.15% perfume. Table 15: Composition of liquid detergent Ingredients Concentration [Weight%] Sodium Alkyl Sec Sulfonate of Ci4-n 7 Fatty Acids, C12-18 and Cis-unsaturated2) 7.5 C12 / 14 Polyglycol Fatty Alcohol Ether with 7 mol EO3) 17 110 Triethanolamine 7.5 Propylene glycol 11 Citric acid 6.5 Potassium hydroxide 9.5 Properase L4) 0.2 Puradax EG L4) 0.2 Purastar ST L4) 0.2 Acrylates / Steareth-205 methacrylate structural crosspolymer) 6 Deionized water 27.4 rzoonn / nznz / E / YiAi 1) Hostapur SAS 60; Origin: Clariant 2) Edenor K 12-18; Origin: Cognis 3) Genapol LA 070; Origin: Clariant 4) Origin: Genencor International 5) Aculyn 88; Origin: Dow Chemical Protocol Fabrics (2.0 kg of cotton terry towels) were washed at 40°C in a standard European horizontal-axis washing machine (Miele Novotronic W 900-79 CH) with a 35 g dose of liquid detergent containing 0.53% microcapsule suspension. After washing, the fabrics were line-dried overnight before a panel of 8 trained panelists assessed the odor intensity of the cotton towels. The panelists were asked to rate the odor intensity of the towels before and after gently rubbing the fabrics by hand on a scale of 1 to 7. 111 corresponds to toilet and 7 corresponds to a very strong smell. Results Table 16: Olfactory intensity in towels (before and after rubbing) Overall fragrance intensity Fresh sample Line drying 1 day before rubbing 1 day after rubbing 35 g of liquid detergent with 0.53% microcapsule suspension H 2.5 3.5 Example 21 Olfactory behavior in a composition of EdT with high ethanol content Table 17: Composition of EdT with high ethanol content Ingredients Quantity (% Weight) Ethanol 40B 78.00 Capsule suspension equivalent to 1% perfume oil Deionized water remaining amount based on the total weight of the capsule suspension 112 On a 76 x 127 mm (3 x 5 in) blotting paper, 160 pL (~0.2 g) of product (a high-ethanol EdT base loaded with 1% encapsulated perfume oil) was applied uniformly to the surface. The blotting paper was air-dried for 1 hour and then for 4 hours on a precision hot plate preheated to 32°C, for a total drying time of 5 hours before evaluation. Fragrance intensity was initially evaluated (before rubbing) and then again after rubbing the blotting paper three times (after rubbing). Evaluation scale: = odorless; 2 = merely perceptible; 3 = faint; = moderate; 5 = strong; 6 = very strong; 7 = extremely strong Results The intensity of perfume perception on blotters treated with H and L microcapsules was evaluated by a panel of 20 trained panelists. They were asked to rate the intensity of perfume perception on a scale of 1 to 7, where 1 means no odor and 7 means a very strong odor. As can be seen in Figure 17, the microcapsules of the invention demonstrate a significant bursting effect after rubbing compared to the delta intensity of the free oil control. 113 Example 22 Olfactory behavior in EdT composition with low ethanol content Table 18: Composition of EdT with low ethanol content ρζοοηη / ηζηζ / Ε / γίΛΐ Ingredients Quantity (% Weight) Ethanol 40B 40.00 Capsule Suspension equivalent to 1% perfume oil Deionized Water remaining amount based on total capsule suspension weight On a 76 x 127 mm (3 x 5 in) blotting paper, 160 pL (~0.2 g) of product (low-ethanol EdT base loaded with 1% encapsulated perfume oil) was applied uniformly to the surface. The blotting paper was air-dried for 1 hour and then for 4 hours on a precision hot plate preheated to 32°C, for a total drying time of 5 hours before evaluation. Fragrance intensity was initially evaluated (before rubbing) and then again after rubbing the blotting paper three times (after rubbing). Evaluation scale: = odorless; 2 = just noticeable; 3 = weak; 4 = moderate; 5 = strong; 6 = very strong; 7 = extremely strong 114 Results The intensity of perfume perception on blotters treated with H, G, and L microcapsules was evaluated by a panel of 20 trained panelists. They were asked to rate the intensity of perfume perception on a scale of 1 to 7, where 1 means no odor and 7 means a very strong odor. As can be seen in Figure 18, the microcapsules of the invention demonstrate a significant burst effect after rubbing compared to the delta intensity of the free oil control. Example 23 Preparation of spray-dried microcapsules Emulsions 1-5 are prepared which have the following ingredients. Table 19: Composition of Emulsions 1-5 and composition of granulated powder 1-5 after spray drying Ingredients Emulsion 1 Emulsion 2 Emulsion 3 Emulsion 4 Emulsion 5 Modified Starch X) 2.6% 2.6% 2.6% 12.5% ​​2% Maltodextrin2) 26.8% 22.8% 19.3% 0% 19.1% Maltose3) 0% 0% 0% 7.9% 0% Citric Acid 0% 0% 0% 1% 0% Trypotassium Citrate 0% 0% 0% 1.9% 0% EK Microcapsules 12.0% 24% 37.0% 8.9% 56.2% Silica 4) 1.1% 1.1% 1.1% 0% 0% Perfume-free C 5| 0% 0% 0% 11% 0% Water 57.6% 49.6% 40.1% 56.9% 22.7% Granule 1 Granule 2 Granule 3 Granule 4 Granule 5 Modified Starch 7.5% 7.4% 7.2% 31.6% 4.9% Maltodextrin 77.4% 65.5% 53.8% 0% 44.7% Maltose 0% 0% 0% 20.9% Citric Acid 0% 0% 0% 2.6% 0% Tripotassium Citrate 0% 0% 0% 4.9% 0% Encapsulated Perfume 0% 0% 0% 28.1% 0% Microcapsules 12.0% 24.1% 36.1% 9.8% 48.4% Silica 3.0% 3.0% 2.9% 2.0% 2% Fragrance load in powder after spray drying 10.1% 20.1% 30% 35.8% 40.2% 1) Capsul™, Ingredion 2) Maltodextrin 10DE, origin: Roquette 3) Maltose, Lehmann & Voss 4) Silica, Evonik 5) see table 20 Table 20: Perfume composition C Component % 4-(l,l-DIMETHYLETHYL)-l-CYCLOHEXYL ACETATE 14.50 LINALOE BJ 10.50 lilial®2) 10.00 ISO E SUPER 3) 10.00 CITRONELIL nitrile 9.00 ρζοοηη / ηζηζ / Ε / γίΛΐ 116 DIPHENYL OXIDE 6.50 ISOBORNYL ACETATE 6.00 BETA IONONE 6.00 TRICYCLO[5.2.LO~2,6~]DEC-3-EN-8-YL ACETATE (A) + TRICYCLO[5.2.1.0-2,6~]DEC-4-EN-8-YL ACETATE (B) 4) 5.50 ÉTERMT 4.00 HEDIONE® 5) 4.00 GERANIOL 60 3.00 CITRAL 2.50 ALDEHYDE C 10 2.50 ALYL HEPTANOATE 2.50 ETHYL METHYL-2-BUTYRATE 1.50 GERANIOL ACETATE 2,4-DIMETHYL-3-CYCLOHEXENO-1-CARB ALDEHYDE 6) LOO ρζοοηη / ηζηζ / Ε / γίΛΐ 1) Firmenich SA, Switzerland 2) 3-(4-terc-butylphenyl)-2-methylpropanal, Givaudan SA, Vernier, Switzerland 3) 1-(octahidro-2,3,8,8-tetramethyl-2-naphthalenyl)-1etanona, International Flavors & Fragrances, EE.UU. 4) Firmenich SA, Switzerland 5) Methyl dihydrojasmonate, Firmenich SA, Switzerland 6) Firmenich SA, Switzerland The components of the polymer matrix (maltodextrin and capsul™, or capsul™, citric acid and tripotassium citrate) are added to water at 45-50°C until completely dissolved. For emulsion 4, the free perfume C is added to the 117 aqueous phase. A suspension of microcapsules is added to the resulting mixture. The mixture is then gently blended at 25°C (room temperature). AE granulated powders are prepared by spray drying the AE Emulsion using a Sodeva spray dryer (made in France), with an air inlet temperature set at 215°C and a throughput set at 500 mL per hour. The air outlet temperature is 105°C. The emulsion is at room temperature before spraying. Example 24 Liquid aroma enhancer composition A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed and mixed into a liquid aroma enhancer (Table 21) to add the equivalent of 0.2% perfume. Table 21: Composition of liquid aroma enhancer ρζοοηη / ηζηζ / Ε / γίΛΐ Ingredients Quantity (% Weight) 1 2 3 4 5 6 Water 71.20% 89.5% 78.8% 79.4% 70% 70% Propylene glycol 20.30% - - - 20% 20% 118 Polyethylene glycol ethers of decyl alcohol l (4.00% 6% Polyethylene glycol ether of lauryl alcohol2) 4.00% 4.00% C8-C10 alkyl polyglucoside3) 8.30% 7.7% Deceth-3X) 1.50% Lauryl lactate 1% Lauric acid 1.5% 1.60% Glyceryl Caprylate 3.00% 3.00% Fragrance 3.00% 3.0% 3.00% 3.00% 3.00% 0% 1) Deceth-8; brand and origin: KLK Oleo 2) Laureth-9; brand and origin 3) Plantacare 2000UP; brand and origin: BASF Different ring gel compositions (compositions 1-6) are prepared according to the following protocol. In a first step, the aqueous phase (water), the solvent (propylene glycol) if present and the surfactants are mixed at room temperature with stirring using a magnetic stirrer at 300 rpm for 5 min. In a second step, the linker is dissolved in the hydrophobic active ingredient (fragrance) at room temperature with stirring using a magnetic stirrer at 300 rpm. The resulting mixture is stirred for 5 min. 119 Then, the aqueous phase and the oil phase are mixed together at room temperature for 5 min, leading to the formation of a transparent or opalescent ring gel. Example 25 Composition of powdered detergent A sufficient quantity of granules 1-5 is weighed and mixed into a powder detergent composition (Table 22) to add the equivalent of 0.2% perfume. Table 22: Composition of ezoonn / nznz / E / YiAi detergent powder Ingredients Part Anionic (linear alkylbenzene sulfonates) 20% Non-ionic (alcohol ethoxylates (5-9 ethylene oxide)) 6% Adjuvants (zeolites, sodium carbonate) 25% Silicates 6% Sodium sulfate 35% Other (enzymes, polymers, lye) 7.5% Spray-dried granulated powder 1-5 0.5% Example 26 Composition of concentrated multipurpose cleaner A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed and mixed into a concentrated multipurpose cleaning composition (Table 23) to add the equivalent of 0.2% perfume. 120 Table 23: Composition of concentrated multipurpose cleaner Γζοοηη / ηζηζ / Β / γι Ingredients Quantity (% Weight) Function Ethoxylated alcohol (C9-C11, 8EO)(1) 20 Non-ionic surfactant Sodium dodecylbenzenesulfonate (2) 16 Anionic surfactant Sodium cumenesulfonate (3) 8 Hydrotrope Methyl chloroisothiazolinone Methyl isothiazolinone 3.3:1 (4) 0.8% preservative 1) Neodol 91-8®; registered trademark and origin: Shell Chemical 2) Biosoft D-40®; registered trademark and origin: Stepan Company 3) Stepanate SCS®; registered trademark and origin: Stepan Company 4) Kathon CG®; registered trademark and origin: Dow Chemical Company All the ingredients are mixed together and then the mixture is diluted with water to 100%. 121 Example 27 ρζοοηη / ηζηζ / Β / γι Composition of solid aroma enhancer The following compositions are being prepared. Table 24: Salt-based solid odor-enhancing compositions Ingredients Part Sodium Chloride 95 Spray-dried granulated powder 1-5 5 Table 25: Solid odor-enhancing compositions based on urea Ingredients Part Urea (pearls) 94 Spray-dried granulated powder 1-5 8 Bentonite 3 Perfume 3 Example 28 Shampoo composition A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed and mixed into a shampoo composition (Table 26) to add the equivalent of 0.2% perfume. 122 Table 26: Composition of ezoQnn / nznz / E / Yii shampoo Ingredients Concentration [Weight%] A Deionized Water 44.4 Polyquaternium-10 0.3 Glycerin 85% 2) 1 DMDM ​​Hydantoin 3) 0.2 B Sodium Laureth Sulfate 4) 28 Cocamidopropyl Betaine 3) 3.2 Disodium Cocoamphodiacetate 6) 4 Stearyl Ethoxy (20) Alcohol 6) 1 C Sodium Laureth Sulfate 4) 3 Glyceryl Laureate 7) 0.2 D Deionized Water 1 Sodium Methylparaben 8) 0.1 E Sodium Chloride 10% Aqueous Solution 15 Citric Acid 10% Aqueous Solution to pH 5.5-6 qs Perfume 0.5 TOTAL: 100 1) Ucare JR-400 Polymer, Noveon 2) Schweizerhall 3) Glydant, Lonza 4) Texapon NSO IS, Cognis 5) Tego Betain F 50, Evonik 123 6) Amphotensid GB 2009, Zschimmer & Schwarz 7) Monomuls 90 L-12, Gruenau 8) Nipagina monosodica, ÑIPA Polyquaternium-10 is dispersed in water. The remaining ingredients of Phase A are mixed separately by adding them one after the other, mixing thoroughly after each addition. This premix is ​​then added to the Polyquaternium-10 dispersion and mixed for 5 minutes. Phase B and the premixed Phase C (heat melted using Monomuls 90L-12 in Texapon NSO IS) are then added. The mixture is thoroughly mixed. Phase D and Phase E are then added while stirring. The pH is adjusted with citric acid solution to 5.5–6.0. Example 29 Shampoo composition A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed and mixed into a shampoo composition (Table 27) to add the equivalent of 0.2% perfume. ρζοοηη / ηζηζ / Β / γι 124 Table 27: Shampoo Composition Γζοοηη / ηζηζ / Β / γι Ingredientes Concentración [Weight%] A Water desionized 45.97 EDTA tetrasodico ' ' 0.05 Guar chloride hidroxipropiltrimonio 2) 0.05 Polyquaternium-10 3) 0.075 B NaOH sol. 10% water 0.3 C Ammonium lauryl sulphate 4) 34 Ammonium laureth sulphate 5) 9.25 Cocamidopropyl betaine6) 2 Dimeticona (&) C12-13 Pareth-4 (&) C12-13 Pareth-23 (&) Salicylic acid 7) 2.5 D Cetylic alcohol 8) 1.2 Cocamida MEA 9) 1.5 Glycol distearate 10) 2 E Methylchloroisothiazolinona y Methylisothiazolinona U) 0.1 D-Panthenol 75% 12) 0.1 Desionized water 0.3 F Sodium chloride, sol. water at 25% 0.6 TOTAL: 100 1) EDETA B Powder, BASF 2) Jaguar C14 S, Rhodia 3) Polymer Ucare JR-400, Noveon 125 4) Sulfetal LA BE, Zschimmer & Schwarz 5) Zetesol LA, Zschimmer & Schwarz 6) Tego Betain F 50, Evonik 7) Xiameter MEM-1691, Dow Corning 8) Lanette 16, BASF 9) Comperlan 100, Cognis 10) Cutin AGS, Cognis 11) Kathon CG, Rohm and Haas 12) D-Panthenol, Roche A premix comprising guar hydroxypropyltrimonium chloride and polyquaternium-10 is added to water and tetrasodium EDTA while mixing. Once the mixture is homogeneous, NaOH is added. Then, the Phase C ingredients are added, and the mixture is heated to 75°C. The Phase D ingredients are added and mixed until homogeneous. Heating is stopped, and the mixture temperature is reduced to TA. At 45°C, the Phase E ingredients are added while mixing. The final viscosity is adjusted with a 25% NaCl solution, and the pH is adjusted from 5.5–6 with a 10% NaOH solution. Example 30 Anhydrous antiperspirant spray A sufficient amount of microcapsule suspension E, F, G, Η, I, J or K is weighed and mixed into an anhydrous antiperspirant spray composition (Table 28) ρζοοηη / ηζηζ / Β / γι 126 to add the equivalent of 0.2% perfume. Table 28: anhydrous composition in ezoQnn / nznz / E / Yii antiperspirant spray Ingredient Amount (% by weight) Cyclomethicone1) 53.51 Isopropyl myristate 9.04 Silica2) 1.03 Quaternium-18-Hectorite3) 3.36 Aluminum chlorohydrate4) 33.06 1) Dow Corning® 345 Fluid; registered trademark and origin: Dow Corning 2) Aerosil® 200; brand and origin: Evonik 3) Bentone® 38; brand and origin: Elementis Specialties 4) Micro Dry Ultrafine; origin: Reheis Using a high-speed mixer, silica and quaternium-18-hectorite are added to the isopropyl myristate and cyclomethicone mixture. Once fully swollen, aluminum chlorohydrate is added in portions with stirring until the mixture is homogeneous and lump-free. The aerosol cans are filled with 25% of the suspension and 75% propane / butane (2.5 bar). Example 31 Composition of antiperspirant aerosol emulsion A sufficient quantity of suspension is weighed out 127 microcapsules E, F, G, H, I, J or K in the antiperspirant spray emulsion composition (Table 29) to add the equivalent of 0.2% perfume. Table 29: Composition of the aerosol antiperspirant emulsion Γζοοηη / ηζηζ / Β / γι Ingredient Amount (% by weight) Polysorbate 651) (Part A) 0.95 Polyglyceryl-2 dipolyhydroxystearate2) (Part A) 1.05 Cetyl PEG / PPG-10 / 1 Dimethicone3) (Part A) 2.75 Cyclomethicone4) (Part A) 16.4 Isopropylisostearate5) (Part A) 4.5 Phenoxyethanol6) (Part A) 0.5 Ethylhexylglycerin7) (Part A) 0.2 C12-15 Alkyl Benzoate8) (Part A) 5.65 Silica Silylate9) (Part A) 0.1 Sodium Methylparaben10) (Part B) 0.1 Aluminum Chlorohydrate11) (Part B) 20 Water (Part B) 44.47 Fragrance (Part C) 3.33 1) Tween 65; brand and origin: CRODA 2) Dehymuls PGPH; brand and origin: BASF 3) Abil EM-90; brand and origin: BASF 4) Dow Corning 345 Fluid; registered trademark and origin: Dow Corning 128 5) Crodamol cockroach; brand and origin: CRODA 6) Phenoxyethanol; brand and origin: LANXESS 7) Sensitive is 50; brand and origin: KRAFT 8) Tegosoft TN; brand and origin: Evonik 9) Aerosil R 812; brand and origin: Evonik 10) I became; brand and origin: CLARIANT 11) Locron L; brand and origin: CLARIANT The ingredients for Part A and Part B are weighed separately. The ingredients for Part A are heated to 60°C and the ingredients for Part B to 55°C. The ingredients for Part B are poured into Part A in small portions while continuously stirring. The mixture is stirred thoroughly until it reaches room temperature. Then, the ingredients for Part C are added. The emulsion is mixed and poured into aerosol cans. The propellant is crimped and added. Aerosol fill: 30% Emulsion: 70% Propane / Butane 2.5 bar Example 32 Composition of aerosol deodorant A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed into an antiperspirant aerosol deodorant composition (Table 30) to add the equivalent of 0.2% perfume. ezoonn / nznz / E / Yii 129 Table 30: Composition of aerosol deodorant Ingredient Amount (% by weight) Ethanol 95% 90.65 Triclosan 0.26 Isopropyl myristate 9.09 ρζοοηη / ηζηζ / Β / γι 1) Irgasan® DP 300; brand and origin: BASF All ingredients are mixed and dissolved according to the sequence in Table 24. Then the aerosol cans are filled, crimped, and the propellant is added (Aerosol filling: 40% active solution, 60% propane / butane, 2.5 bar). Example 33 Composition of antiperspirant roll-on emulsion A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed and mixed into a roll-on antiperspirant emulsion composition (Table 31) to add the equivalent of 0.2% perfume. Table 31: Composition of antiperspirant roll-on emulsion Ingredient Quantity (% by weight) Steareth-21 (Part A) 3.25 Steareth-212 (Part A) 0.75 Stearyl ether PPG-153 (Part A) 4 Deionized water (Part B) 51 Aluminum chlorohydrate 50% aqueous solution (Part C) 40 Fragrance (Part D) 1 130 1) BRIJ 72; origin: ICI 2) BRIJ 721; origin: ICI 3) ARLAMOL E; origin: UNIQEMA-CRODA 4) LOGRON L; origin: CLARIAN Parts A and B are heated separately to 75°C; part A is added to part B with stirring, and the mixture is homogenized for 10 minutes. The mixture is then cooled with stirring; and part 0 is added slowly when the mixture reaches 45°C, and part D when the mixture reaches 35°C, while stirring. The mixture is then cooled to room temperature. Example 34 Antiperspirant roll-on composition A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed and mixed into a roll-on antiperspirant composition (Table 32) to add the equivalent of 0.2% perfume. Table 32: composition of roll-on antiperspirant Γζοοηη / ηζηζ / Β / γι Ingredient QUANTITY Water (Part A) 45 Aluminum Chlorohydrate, 50% Aqueous Solution1) (Part B) 20 Alcohol Denat. (Ethanol 96%) (Part B) 30 Ceteareth-122) (Part C) 2 Ceteareth-303) (Part C) 2 Fragrance (Part D) 1 1) LOGRON L; origin: CLARIANT 131 2) EUMULGIN Bl; origin: BASF 3) EUMULGIN B-3; origin: BASF The ingredients from Part B are mixed in the container, and then the ingredient from Part A is added. Part C is then dissolved into Parts A and B. If using perfume, 1 part Cremophor RH40 is added to 1 part perfume while mixing thoroughly. Example 35 Antiperspirant roll-on composition A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed and mixed into a roll-on antiperspirant emulsion composition (Table 33) to add the equivalent of 0.2% perfume. ρζοοηη / ηζηζ / Β / γι Table 33: Composition of antiperspirant roll-on emulsion Ingredient Amount (% by weight) Water (Part A) 50.51 Hydroxyethylcellulose1) (Part A) 0.71 Ethanol 95% (Part B) 40.40 1,2-Propylene glycol (Part B) 5.05 Triclosan2) (Part B) 0.30 PEG-40 Hydrogenated castor oil3) (Part C) 3.03 1) Natrosol® 250 H; brand and origin: Ashland 2) Irgasan® DP 300; brand and origin: BASF 132 3) Cremophor® RH 40; brand and origin: BASF Part A is prepared by gradually spraying the hydroxyethylcellulose into the water while rapidly agitating with the turbine. Agitation continues until the hydroxyethylcellulose is completely swollen and forms a clear gel. Part B is then gradually poured into Part A while continuing to stir until the mixture is homogeneous. Part C is then added. Example 36 Alcohol-free deodorant pump A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 34) to add the equivalent of 0.2% perfume. ezoQnn / nznz / E / Yii Table 34: Deodorant composition Ingredients Quantity (% by weight) C12-15 Alkyl 5 Lactate 1) Dimethicone 2) Cetyl Lactate 91.6 3) Octyldodecanol 4) Triclosan 0.8 5) Perfume 0.1 1) Ceraphyl 41; brand and origin ASHLAND 133 2) DOW CORNING 200 0.65cs FLUID; registered trademark and origin DOW CORNING CORPORATION 3) Ceraphyl 28; brand and origin ASHLAND 4) Euthanol G; BASF brand and origin 5) Irgasan® DP 300; brand and origin: BASF All the ingredients in Table 34 are mixed according to the sequence in the table and the mixture is heated slightly to dissolve the cetyl lactate. Example 37 Deodorant bomb with alcoholic formulation A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 35) to add the equivalent of 0.2% perfume. ρζοοηη / ηζηζ / Β / γι Table 35: Deodorant Composition Ingredients Quantity (% By Weight) Ethyl alcohol (Part A) 60 PEG-6 Caprylic / capric glycerides1* (Part A) 2 Water (Part A) 35.6 PEG-40 hydrogenated castor oil2* (Part B) 0.4 PERFUME (Part B) 2 1) Softigen 767; brand and origin CRODA 134 2) Cremophor® RH 40; brand and origin: BASF The ingredients in Part B are mixed. The ingredients in Part A are dissolved according to the sequence in the Table and poured into Part B. Example 38 Alcohol-free stick deodorant A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 36) to add the equivalent of 0.2% perfume. Table 36: Deodorant composition Ingredient Amount (% by weight) Stearic acid (Part A) 5.05 1,2-Propylene glycol (Part A) 41.87 20% Aqueous Sodium Hydroxide Solution (Part A) 4.24 Water (Part A) 30.30 Tetrasodium EDTA (Part A) 0.10 Ceteareth-25 (Part A) 1.52 PPG-3 Myristyl Ether (Part A) 1.52 1,2-Propylene glycol (Part B) 15.14 Triclosan (Part B) 0.25 1) Edeta® B Power; brand and origin: BASF 2) Cremophor® A25; brand and origin: BASF 135 3) Tegosoft® APM; brand and origin: Evonik 4) Irgasan® DP 300; brand and origin: BASF All components of Part A are weighed and heated to 70–75°C. Ceteareth-25 is added once the other ingredients of Part A are mixed and heated. Once the Ceteareth-25 has dissolved, the stearic acid is added. Part B is prepared by dissolving triclosan in 1,2-propylene glycol. Water that has evaporated is added. Slowly mixing, Part B is poured into Part A. For storage, a plastic bag is placed in the bucket and sealed after cooling. The molds were filled at approximately 70°C. Example 39 Antiperspirant stick A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 37) to add the equivalent of 0.2% perfume. ρζοοηη / ηζηζ / Β / γι Table 37: Deodorant composition Ingredient Quantity (% by weight) Cyclomethicone1) (Part A) 55.56 Stearyl alcohol2* (Part A) 21.21 PPG-14 butyl ether3* (Part A) 2.02 Hydrogenated castor oil4* (Part A) 1.01 Aluminum zirconium tetrachlorohydrex-Gly5) (Part B) 20.20 1) Dow Corning® 345 Fluid; registered trademark and 136 Origin: Dow Corning 2) Lanette® 18; brand and origin: BASF 3) Tegosoft® PBE; brand and origin: Evonik 4) Cutina® HR; brand and origin: BASF 5) AZP-908 Summit; brand and origin: Reheis All components of Part A are weighed, heated to 70-75°C, and thoroughly mixed. The ingredient of Part B is dispersed into Part A. The mixture is blended and placed in a bar at 65°C. Example 40 Day cream A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 38) to add the equivalent of 0.2% perfume. ρζοοηη / ηζηζ / Β / γι Table 38: Day cream Ingredients % ARLATONE 985 Ethoxylated fatty alcohol ester 5.000 CETYL ALCOHOL 0.500 TEFOSE 2561 Ceteth-20 (and) glyceryl stearate (and) PEG-6 stearate (and) Steareth-20 4.000 COSBIOL Squalane 1.000 MINERAL OIL 30-40 cp Paraffin oil 2.000 137 PETROLEUM JELLY Petrolatum 6.000 Deionized Water 75.850 PROPYLENE GLYCOL 5.000 GLYDANT PLUS DMDM ​​Hydantoin (and) Iodopropynyl Butylcarbamate 0.150 PNC 400 Sodium Carbomer 0.200 PERFUME 0.300 Total 100.00 ρζοοηη / ηζηζ / Β / γι Example 41 Talc formulation Weigh out a sufficient quantity of granules 1-5 and mix by introducing into a standard talc base: 100% talc, very mild characteristic odor, white powder, origin: LUZENAC to add the equivalent of 0.2% perfume. Example 42 Shower gel composition A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 39) to add the equivalent of 0.2% perfume. Table 39: Shower gel composition Ingredients Quantity (% Weight) Function Deionized Water 49.350 Solvent 138 Tetrasodium EDTA X) 0.050 Chelating agent Acrylates copolymer 2) 6.000 Thickener C12-C15 Pareth Sodium sulfate 3) 35.000 Surfactant 20% aqueous sodium hydroxide solution 1.000 pH adjuster Cocamidopropyl betaine 41 8.000 Surfactant Methylchloroisothiazolinone and Methylisothiazolinone 5) 0.100 Preservative Citric acid (40%) 0.500 pH adjuster Γζοοηη / ηζηζ / Β / γι 10) EDETA B POWDER; brand and origin: BASF 11) CARBOPOL AQUA SF-1 POLYMER; brand and origin: NOVEON 12) ZETESOL AO 328 U; registered trademark and origin: ZSCHIMMER & SCHWARZ 13) TEGO-BETAIN F 50; brand and origin: GOLDSCHMIDT 14) KATHON CG; trademark and origin: ROHM & HASS The ingredients are mixed, the pH is adjusted to 6-6.3 (Viscosity: 4500cPo + / - 1500cPo (Brookfield RV / Spindle # 4 / 20RPM)). Example 43 Shower gel composition Weigh out a sufficient quantity of E, F, G, H, I, J or K microcapsule suspension in the following composition (Table 40) to add the equivalent of 0.2% perfume. 139 ρζοοηη / ηζηζ / Β / γι Table 40: Shower gel composition Ingredients Quantity (% Weight) Function Deionized water 52.40 Solvent Tetrasodium EDTA X) 0.10 Chelating agent Sodium benzoate 0.50 Preservative Propylene glycol 2.00 Solvent C12-C15 Pareth Sodium sulfate 2) 35.00 Surfactant Cocamidopropyl betaine3) 8.00 Surfactant Polyquaternium-74) 0.20 Conditioning agent Citric acid (40%) 1.00 pH adjuster Sodium chloride 0.80 Viscosity adjuster 1) EDETA B POWDER; brand and origin: BASF 2) ZETESOL AO 328 U; registered trademark and origin: ZSCHIMMER & SCHWARZ 3) TEGO-BETAIN F 50; brand and origin: GOLDSCHMIDT 4) MERQUAT 550; registered trademark and origin: LUBRIZOL The ingredients are mixed, the pH is adjusted to 4.5 (Viscosity: 3000cPo + / - 1500cPo (Brookfield RV / Spindle # 4 / 20RPM)). Example 44 Shower gel composition A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 41) to add the equivalent of 0.2% perfume. 140 Table 41: Composition of ezoQnn / nznz / E / Yii shower gel Ingredients Quantity (% Weight) Function Deionized Water 50.950 Solvent Tetrasodium EDTA 0.050 Chelating Agent Sodium Benzoate 0.50 Preservative Glycerin 86% 3.50 Solvent Sodium Laureth Sulfate 27.0 Surfactant Polyquaternium-7 3) LO Conditioning Agent Coco-Betaine 4) 6.0 Surfactant PEG-120 Methyl Glucose Trioleate 5' LO Thickener Citric Acid (40%) LO pH Adjuster Glycol Distearate and Laureth-4 and Cocamidopropyl Betaine 6' 3.0 Pearlescent Agent Sodium Chloride 20% 5.0 Viscosity Adjuster PEG-40 Hydrogenated Castor Oil 7' LO Viscosity Adjuster 1) EDETA B POWDER; brand and origin: BASF 2) Texapon NSO IS; brand and origin: COGNIS 3) MERQUAT 550; registered trademark and origin: LUBRIZOL 4) DEHYTON AB-30; brand and origin: COGNIS 5) GLUCAMATE LT; registered trademark and origin: LUBRIZOL 141 6) EUPERLAN PK 3000 AM; brand and origin: COGNIS 7) CREMOPHOR RH 40; brand and origin: BASF The ingredients are mixed, the pH is adjusted to 4.5 (Viscosity: 4000cPo + / - 1500cPo (Brookfield RV / Spindle # 4 / 20RPM)) Example 45 Hand dishwashing A sufficient quantity of E, F, G, H, I, J or K microcapsule suspension is weighed out in the following composition (Table 42) to add the equivalent of 0.2% perfume. ezoonn / nznz / E / Yii Table 42: Composition of hand dishwashing liquid Ingredients Quantity (% Weight) Function Linear alkylbenzenesulfonic acid(1) 20 Anionic surfactant Diethanolamide (2) 3.5 Foam enhancer Sodium hydroxide (50%)(3) 3.4 pH adjuster / neutralizer Ethoxylated secondary alcohol (4) 2.5 Nonionic surfactant Sodium xylenesulfonate 6.3 Hydrotrope Water 64.3 Solvent 1) Biosoft S-118®; registered trademark and origin: Stepan Company 2) Ninol 40-CO®; registered trademark and origin: Stepan 142 Company 3) Stepanate SXS®; registered trademark and origin: Stepan Company 4) Tergitol 15-S-9®; registered trademark and origin: Dow Chemical Company Water is mixed with sodium hydroxide and diethanolamide. LAS is added. Once the LAS is neutralized, the remaining ingredients are added. The pH is checked (= 7-8) and adjusted if necessary. Example 46 Toothpaste formulation A sufficient quantity of R microcapsule suspension (corresponding to H or N microcapsules except that an aroma is encapsulated instead of a perfume) is weighed out and mixed in the following composition (Table 43) to add the equivalent of 0.2% aroma. ρζοοηη / ηζηζ / Β / γι Table 43: Toothpaste formulation Ingredients Quantity (% Weight) Polyethylene glycol 400 2.0% Xanthan gum 0.60% Sorbitol, 70% solution 50.0% Sodium fluoride 0.220% Sodium benzoate 0.20% Water 15.230% 143 Hydrated silica1) 22.0% Hydrated silica2) 7.0% Titanium dioxide CI77891 0.500% Sodium lauryl sulfate 1.250% Aroma 1.20% TOTAL 100% ezoQnn / nznz / E / Yii 1) Tixosil 73; brand and origin: 2) Tixosil 43; brand and origin: Example 47 Dicalcium phosphate-based toothpaste formulation A sufficient quantity of R microcapsule suspension (corresponding to H or N microcapsules except that an aroma is encapsulated instead of a perfume) is weighed out and mixed in the following composition (Table 44) to add the equivalent of 0.2% aroma. Table 44: Toothpaste formulation Ingredients Quantity (% Weight) Sodium Carboxymethylcellulose 1.20% Flavor 1.20% Purified Water (dl) to Final Weight Sodium Lauryl Sulfate 1.30% Glycerin 20.0% 144 Sodium saccharin 0.20% Dicalcium phosphate dihydrate 36.0% Methylparaben 0.200% Silica 1'* 3.0% TOTAL 100% Γζοοηη / ηζηζ / Β / γι 1) Aerosil®200; brand and origin: Example 48 Alcohol-free mouthwash formulation A sufficient quantity of R microcapsule suspension (corresponding to H or N microcapsules except that an aroma is encapsulated instead of a perfume) is weighed out and mixed in the following composition (Table 45) to add the equivalent of 0.2% aroma. Table 45: Mouthwash formulation Ingredients Quantity (% Weight) Propylene glycol 10.0% Flavor 0.240% Purified Water (Dl) to final weight Poloxamer 407 NF 0.240% Sodium lauryl sulfate 0.040% Sorbitol, 70% solution 10.0% Sodium saccharin 0.030% 145 Glycerin 3.0% Sodium benzoate 0.10% Sucralose 0.020% Benzoic acid 0.050% TOTAL 100% ρζοοηη / ηζηζ / Β / γι Example 4 9 Mouthwash formulation A sufficient quantity of R microcapsule suspension (corresponding to H or N microcapsules except that an aroma is encapsulated instead of a perfume) is weighed out and mixed in the following composition (Table 46) to add the equivalent of 0.2% aroma. Table 46: Mouthwash formulation Ingredients Quantity (% Weight) Ethyl alcohol grade 190 15.00% Flavor 0.24% Purified water (dl) to final weight Poloxamer 407 NF 0.24% Sodium lauryl sulfate 0.04% Sorbitol, 70% solution 10.00% Sodium saccharin 0.03% Glycerin 3.00% 146 Sodium benzoate 0.10% Sucralose 0.02% Benzoic acid 0.05% TOTAL 100% It is hereby stated that, as of this date, the best method known to the applicant for putting the present invention into practice is the one that is clear from the present description of the invention. ezoQnn / nznz / E / Yii

Claims

1. A process for preparing a core-shell microcapsule suspension, characterized in that it comprises the steps of: (i) mixing a salt and optionally a crosslinking agent in an aqueous solution comprising at least one protein to form an aqueous phase; (ii) dispersing an oily phase comprising a hydrophobic material, preferably a perfume oil or a flavoring oil, in the aqueous phase to form an oil-in-water emulsion; (iii) adding a crosslinking agent to the oil-in-water emulsion if the crosslinking agent has not already been added in step (i); (iv) applying conditions sufficient to induce crosslinking of the protein to form a core-shell microcapsule in suspension form.

2. The process according to claim 1, characterized in that it comprises the steps of: (i) mixing a salt into an aqueous solution comprising at least one protein to form an aqueous phase; (ii) dispersing an oily phase comprising a hydrophobic material, preferably a perfume oil or a flavoring oil, in the aqueous phase to form an oil-in-water emulsion; (iii) adding a crosslinking agent to the oil-in-water emulsion; and (iv) applying conditions sufficient to induce crosslinking of the protein to form a biopolymer shell.

3. The process according to claim 1 or 2, characterized in that the protein is used in an amount between 0.5 and 10% based on the total weight of the microcapsule suspension.

4. The process in accordance with any of the preceding claims, characterized in that the protein is selected from the group consisting of milk proteins, sodium caseinate, calcium caseinate, casein, whey protein, hydrolyzed proteins, gelatins, gluten, pea protein, soy protein, silk protein and mixtures thereof.

5. The process according to claim 4, characterized in that the protein is a mixture of sodium caseinate and whey protein.

6. The process according to any of the preceding claims, characterized in that the salt added to the aqueous solution of step a) is selected from group Γζοοηη / ηζηζ / Β / γι 149 consisting of CaCl2, NaCl, KCl, LiCl, Ca(NO3)2z MgCl2, and mixtures thereof.

7. The process in accordance with any of the preceding claims, characterized in that the weight ratio between salt and protein is between 0.01:1 and 1:

1.

8. The process in accordance with any of the preceding claims, characterized in that the crosslinking agent is an enzyme, preferably transglutaminase.

9. The process according to any of the preceding claims, characterized in that the oily phase further comprises a polyfunctional monomer, preferably a polyisocyanate having at least two polyisocyanate groups.

10. The process according to any of the preceding claims, characterized in that it comprises after step (iv) additional steps consisting of (v) optionally, adsorption of at least one mineral precursor onto the microcapsule shell; (vi) applying suitable conditions to induce the growth of a mineral layer on the microcapsule shell.

11. The process according to claim 10, characterized in that the mineral precursor is adsorbed onto the microcapsule shell by incubating the core-shell microcapsules in at least one mineral precursor solution, wherein the mineral precursor solution is selected from the group of iron(II) sulfate solution, iron(III) chloride solution, calcium-based salt solution, phosphate-based salt solution, carbonate-based salt solution, titanium-based precursor solution, zinc-based precursor solution, and mixtures thereof.

12. The process according to claim 11 or 12, characterized in that the microcapsules obtained in step (v) are further incubated in a second oppositely loaded mineral precursor solution or in a solution for inducing mineralization of the mineral precursor of step (v).

13. A core-coated microcapsule suspension characterized in that it comprises at least one microcapsule composed of: - an oil-based core; - optionally an inner shell made of a polymerized polyfunctional monomer; - a biopolymer shell comprising a protein, wherein at least one protein is cross-linked; and - optionally at least an outer mineral layer.

14. The core-coated microcapsule suspension according to claim 13, characterized in that the protein comprises sodium caseinate.

15. The core-covered microcapsule suspension according to claim 13 or 14, characterized in that the protein is a mixture comprising sodium caseinate and whey protein.

16. The core-coated microcapsule suspension according to claim 13 to 15, characterized in that it comprises an inner coating made of a polymerized polyisocyanate having at least two polyisocyanate functional groups.

17. A composition characterized in that it comprises the microcapsules according to any of claims 13 to 16, wherein the composition is in the form of a perfumed consumer product, preferably selected from the group consisting of antiperspirants, hair care products, body products, oral care products, laundry products or in the form of a flavored consumer product, preferably selected from the group consisting of snacks, dairy products, bakery products, savory products, confectionery.