Laundry composition

Abstract

The present invention provides a unit dose laundry detergent composition comprising: a) a surfactant; b) a water-soluble substrate comprising: - at least one film-forming agent; - a thickening agent; - at least one plasticizing agent; wherein the weight ratio between the at least one film-forming agent and the thickening agent and the at least one plasticizing agent is from about 3.5:1 to about 5.5:1, preferably about 4.5:1, based on dry weight; and c) a microcapsule composition comprising a polymer encapsulating at least a perfume ingredient, wherein the at least a perfume ingredient is encapsulated in a core-shell microcapsule comprising a core and a shell surrounding the core. The present invention also provides a process for making such a composition and the use of such a composition.

Description

[0001] This invention relates to water-soluble unit-dose laundry detergent compositions comprising microcapsule compositions containing polymers encapsulating at least a fragrance component, methods for preparing such compositions, and their use for improving the perception of the laundry detergent or enhancing the performance of the laundry detergent. Background of the Invention

[0003] Water-soluble unit-dose laundry detergents exhibit similar cleaning performance to conventional laundry detergents, and have the advantages of being more sustainable and easier to use. Water-soluble unit-dose laundry detergents are commercially available, for example, in the form of laundry sheets of specific lengths, widths, and thicknesses, depending on the concentration of surfactants. When used, the laundry sheets release their components upon the addition of water. In addition to surfactants, some laundry sheets also contain fragrance ingredients, which are also released when the laundry sheet comes into contact with water.

[0004] For ease of use, consumers want laundry sheets to be solid, non-sticky, and non-brittle. Ideally, laundry sheets should be strong enough to withstand substantial mechanical forces without losing their structural integrity, yet flexible enough for easy packaging and storage. Simultaneously, consumers expect laundry sheets to provide a pleasant fragrance on fabrics throughout all stages of the washing and drying process.

[0005] Developing fabric care products that provide optimal exposure to effective levels of fragrance ingredients over extended periods is a significant challenge. Multiple studies have shown that consumer products are more effective when fragrance ingredients are available at individually tailored levels at target sites at specific times. This challenge can be addressed by utilizing encapsulated fragrance ingredients.

[0006] Fragrance ingredients are encapsulated for a variety of reasons. Microcapsules can isolate and protect these materials from external suspended media, such as consumer product matrices, where they may be incompatible or unstable. They are also used to assist in the deposition of fragrance ingredients onto substrates such as fabrics. They can also serve as a means of controlling the spatiotemporal release of fragrance ingredients.

[0007] Encapsulated fragrances typically enhance scent perception during mechanical activation, such as when clothes are removed from a washing machine. Furthermore, encapsulated fragrances can be released during fabric treatment, often under mechanical forces. Core-shell microcapsules can be used, where the core contains the encapsulated fragrance and is surrounded by an impermeable, fragile shell.

[0008] For example, US 2018 / 223225 A1 relates to water-soluble detergent sheets of a specific size containing encapsulated fragrance ingredients. The "base" is based on a water-soluble film-forming component. However, no examples of detergent compositions are provided, and the problems with texture, flexibility, and adhesion of detergent sheets in the presence of encapsulated fragrance are not addressed. Besides the ease of handling specific consumer products, pleasant olfactory properties when used for washing fabrics and the stability of the consumer product over time are also important to consumers. Therefore, there remains a need to develop unit-dose laundry detergent compositions containing encapsulated fragrance.

[0009] This invention provides a unit-dosage detergent composition that meets the above requirements. Once sufficient water is removed, the composition is essentially a non-sticky and flexible solid with sufficient strength to withstand substantial mechanical forces without losing its structural integrity. Simultaneously, the composition provides excellent olfactory properties during both the wet and dry phases of the washing process. The properties of the composition are maintained after a period of storage. Invention Overview

[0011] In a first aspect, the present invention relates to a unit dose laundry detergent composition comprising:

[0012] a) Surfactants;

[0013] b) A water-soluble base comprising:

[0014] - At least one film-forming agent;

[0015] - Thickener;

[0016] - At least one plasticizer;

[0017] Wherein, based on dry weight, the weight ratio between the at least one film-forming agent and thickener and the at least one plasticizer is from about 3.5:1 to about 5.5:1, preferably about 4.5:1; and

[0018] c) A microcapsule composition comprising a polymer encapsulating at least one fragrance ingredient, wherein the at least one fragrance ingredient is encapsulated in a core-shell microcapsule, the microcapsule comprising a core and a shell surrounding the core.

[0019] In another aspect, the present invention provides a method for preparing compositions as described herein.

[0020] In another aspect, the use of the compositions described herein for improving the perception of the at least one fragrance ingredient in the consumer product or enhancing the performance of the at least one fragrance ingredient in the consumer product is provided.

[0021] definition

[0022] As used in this article, the term "water-soluble" means a solubility of more than about 30 grams per liter of deionized water (g / L) measured at 20°C and atmospheric pressure. The term "substantially water-soluble" means a solubility of more than about 25 grams per liter of deionized water (g / L) measured at 20°C and atmospheric pressure.

[0023] The term "solid" refers to a material that is in a solid aggregate state at temperatures below approximately 40°C.

[0024] As used in this article, the term "sheet" refers to a three-dimensional shape having thickness, length, and width, wherein the aspect ratio of length to thickness and the aspect ratio of width to thickness are both at least about 5:1.

[0025] The term "pellet" refers to a three-dimensional shape that is fully or partially circular, such as an ellipsoid, sphere, or cylinder.

[0026] The performance of microcapsules is measured by the intensity of fragrance release during use, such as in the pre-friction and post-friction phases of a laundry process. The pre-friction phase is the stage where microcapsules have already deposited on the fabric, for example, after a consumer product containing microcapsules has been used in a washing cycle. The post-friction phase is after the microcapsules have deposited and broken down through friction or other similar mechanisms.

[0027] In the context of this invention, unless otherwise stated, all percentages refer to weight percentages (weight %). Numerical ranges expressed in "x to y" format also include the given values. If several preferred numerical ranges are indicated in this format, it will be readily understood that all ranges resulting from combinations of various endpoints are also included.

[0028] In the context of this invention, the term "based on dry weight" refers to the weight of the compound, where the presence of water is ignored for calculation purposes.

[0029] Detailed description

[0030] Unless the context otherwise requires, any aspect of the invention may be combined with any other aspect of the invention. Unless the context otherwise requires, any preferred or optional feature of any aspect may be combined, alone or in combination, with any aspect of the invention and with any other preferred or optional feature.

[0031] The applicant has surprisingly and unexpectedly discovered that a unit-dose laundry detergent composition meets the expected standards for commercial unit-dose laundry detergents, said unit-dose laundry detergent composition comprising:

[0032] a) Surfactants;

[0033] b) A water-soluble base comprising:

[0034] - At least one film-forming agent;

[0035] - Thickener;

[0036] - At least one plasticizer;

[0037] Wherein, based on dry weight, the weight ratio between the at least one film-forming agent and thickener and the at least one plasticizer is from about 3.5:1 to about 5.5:1, preferably about 4.5:1; and

[0038] c) A microcapsule composition comprising a polymer encapsulating at least one fragrance ingredient, wherein the at least one fragrance ingredient is encapsulated in a core-shell microcapsule, the microcapsule comprising a core and a shell surrounding the core.

[0039] Once the composition reaches a suitable low water content, it is essentially solid, non-sticky, and strong enough to withstand substantial mechanical forces without losing its structural integrity, while also possessing sufficient flexibility for packaging and storage. The composition provides excellent olfactory properties during both the wet and dry phases of the washing process. The properties of the composition are maintained over a long period.

[0040] Therefore, the present invention provides a unit dose laundry detergent composition comprising:

[0041] a) Surfactants;

[0042] b) A water-soluble base comprising:

[0043] - At least one film-forming agent;

[0044] - Thickener;

[0045] - At least one plasticizer;

[0046] Wherein, based on dry weight, the weight ratio between the at least one film-forming agent and thickener and the at least one plasticizer is from about 3.5:1 to about 5.5:1, preferably about 4.5:1; and

[0047] c) A microcapsule composition comprising a polymer encapsulating at least one fragrance ingredient, wherein the at least one fragrance ingredient is encapsulated in a core-shell microcapsule, the microcapsule comprising a core and a shell surrounding the core.

[0048] surfactants

[0049] To perform its detergent function, the composition contains at least one surfactant. A surfactant is a surface-active ingredient that removes dirt particles from textiles during washing with a detergent (e.g., water) by forming micelles. Suitable surfactants include cationic surfactants, anionic surfactants, nonionic surfactants, and amphoteric / amphoionic surfactants. Any mixture of two or more surfactants may also be used, depending on the desired washing performance.

[0050] In one embodiment, the surfactant is selected from anionic surfactants, nonionic surfactants, amphoteric surfactants, or combinations thereof. Preferably, the surfactant is a mixture of anionic surfactants, nonionic surfactants, and amphoteric surfactants.

[0051] Suitable anionic surfactants include, but are not limited to, alkylbenzene sulfonates, olefin sulfonates, alkane sulfonates, fatty alcohol sulfates, fatty alcohol ether sulfates, or mixtures of two or more of these anionic surfactants. The anionic surfactant may be present in the form of its sodium, potassium, magnesium, or ammonium salt. Preferably, the anionic surfactant is present in the form of its sodium salt.

[0052] In one embodiment, the anionic surfactant is an olefin sulfonate, such as sodium C14-16 olefin sulfonate. In one embodiment, the sodium C14-16 olefin sulfonate is sold under the commercial name Bio Terge AS-40 (from Stepan).

[0053] Suitable nonionic surfactants include alkoxylated fatty alcohols, alkoxylated oxo alcohols, alkoxylated fatty acid alkyl esters, fatty acid amides, alkoxylated fatty acid amides, polyhydroxy fatty acid amides, alkylphenol polyethylene glycol ethers, amine oxides, alkyl (poly)glucosides, and mixtures thereof. The nonionic surfactant is preferably an alkyl (poly)glucoside, such as coco-glucoside. In one embodiment, the coco-glucoside is sold under the commercial name Plantaren 818 UP (from BASF).

[0054] Suitable amphoteric / amphoionic surfactants include amine oxides and betaine. The amphoteric surfactant is preferably cocamidopropyl betaine. In one embodiment, the cocamidopropyl betaine is sold under the commercial name Lexaine CMB (from Inolex).

[0055] To obtain particularly good washing performance and high detergency, the surfactant is present, based on dry weight, at about 24% to about 29% by weight of the composition, preferably about 25% to about 28.5% by weight, particularly about 25.5%, 26.0%, 26.5%, 27.0%, 27.5%, 28.0 or 28.5% by weight, preferably about 26.5% by weight.

[0056] In one embodiment, the ratio of anionic surfactant:nonionic surfactant:amphoteric / amphoteric surfactant is about 11.5:3.0:1, for example 11.2:2.8:1.

[0057] Water-soluble base

[0058] The unit-dosage laundry detergent composition contains a water-soluble base, which provides the necessary properties for ease of handling. The base is solid and flexible when dry, but is a completely soluble material in water. The base is typically produced by mixing the components as an aqueous solution. When the aqueous solution of the base is combined with the remaining desired components in appropriate proportions, the resulting liquid can be poured onto a drying plate or drying container. After removing excess water, the resulting composition is in the form of solid flakes or granules, which retain their flexibility. These flakes or granules can then be placed in a washing machine, and the components are released upon the addition of water, leaving no residue.

[0059] The water-soluble substrate comprises at least one film-forming agent, a thickener, and at least one plasticizer.

[0060] The at least one film-forming agent may be selected from water-soluble polymers (synthetic or naturally derived) and may be chemically and / or physically modified. Suitable examples of water-soluble polymers include polyalkylene glycols (also known as polyoxyalkylene or polyoxyethylene), polyvinyl alcohol, polyacrylates, polymethacrylates, polyacrylamide, polyvinylpyrrolidone, and proteins / peptides or their hydrolysates (e.g., collagen and gelatin). Preferably, the film-forming agent is selected from polyalkylene glycols, polyvinyl alcohol, polyacrylates, polymethacrylates, polyacrylamide, polyvinylpyrrolidone, and combinations thereof. In a particularly preferred embodiment of the invention, the at least one film-forming agent is polyvinyl alcohol (PVOH or PVA).

[0061] In one embodiment, the at least one film-forming agent is polyvinyl alcohol having a degree of hydrolysis of 87% to 89%, more particularly 88%, wherein the degree of hydrolysis is defined as the percentage of hydrolyzed vinyl acetate moiety present in the polymer chain.

[0062] In one embodiment, the polyvinyl alcohol is sold under the commercial name Selvol 21-205 (from Sekisui).

[0063] Based on dry weight, the film-forming agent may be present at about 16% to about 23% by weight, preferably about 18% to about 22% by weight, for example about 18.5%, 19.0%, 19.5%, 20.0%, 20.5%, 21.0%, 21.5% by weight, preferably about 19.0% by weight, of the composition. In one embodiment, based on dry weight, the film-forming agent is present at 18.9% by weight of the composition.

[0064] Thickeners are needed to provide the necessary viscosity to the substrate before drying. It is believed that as the amount of thickener in the composition increases, the substrate becomes more viscous, making the composition difficult to handle. However, if the amount of thickener is too low, the substrate is not thick enough to deposit onto the drying plate. Thickeners are composed of polymers such as starch, modified starch, or cellulose, which produce a material during drying that remains solid and flexible but is completely soluble in water.

[0065] Starch includes, but is not limited to, corn starch, amyl corn starch, potato starch, rice starch, pea starch, tapioca starch, wheat starch, waxy starch, and starch degradation products such as dextrin. Mixtures of the above-mentioned starches (including their degradation products) are also feasible. The base comprises one or more types of starch selected from corn starch, potato starch, rice starch, pea starch, tapioca starch, wheat starch, waxy starch, and dextrin. Preferably, the starch is corn starch. Preferably, the corn starch is sold under the commercial name Purity 21C Pure (from Nouryon).

[0066] Based on dry weight, the thickener may be present at about 35% to about 42% by weight, preferably about 37% to about 40% by weight, for example about 37.5%, 38.0%, 38.5%, 39.0%, 39.5% by weight, preferably about 38.5% by weight, of the composition. In one embodiment, based on dry weight, the thickener is present at 38.3% by weight of the composition.

[0067] In one embodiment, the weight ratio of the thickener to the at least one film-forming agent is from about 2.5:1 to about 1.5:1, preferably about 2.0:1, based on dry weight. Such a ratio provides an ideal balance between the flowability and hardness of the composition before drying, thereby facilitating the preparation process.

[0068] In addition to the at least one film-forming agent and thickener, the composition also contains at least one plasticizer for improving the physical properties of the film-forming agent and thickener. It is believed that the addition of the plasticizer helps to give the composition flexibility after drying, thereby avoiding brittleness that may result from the presence of other components, resulting in a soft-touch, flexible, and smooth composition. Suitable plasticizers are, for example, pentaerythritols such as dipentaerythritol, sorbitol, mannitol, and glycols such as glycerol or ethylene glycol. The at least one plasticizer is preferably glycerol. After drying, up to about 10% by weight of residual water may be present in the composition, but in the context of this invention, water is not considered a plasticizer.

[0069] Based on dry weight, the plasticizer may be present at about 8.0% by weight to about 15.0% by weight, preferably about 10.0% by weight to about 13.0% by weight, for example about 10.5%, 11.0%, 11.5%, 12.0%, and 12.5% ​​by weight. In one embodiment, the plasticizer is present at about 12.5% ​​by weight based on dry weight. In another embodiment, the plasticizer is present at 12.7% by weight based on dry weight.

[0070] The applicant has surprisingly and unexpectedly discovered that, for a given film-forming agent, the mechanical properties of the substrate, the water solubility of the substrate during the washing process, and the compatibility of the substrate with both the surfactant and the core-shell microcapsule composition are controlled solely by the weight ratio between the at least one film-forming agent and thickener and the at least one plasticizer. Specifically, these properties are optimal when the weight ratio between the at least one film-forming agent and thickener and the at least one plasticizer is from about 3.5:1 to about 5.5:1, preferably about 4.5:1 (based on dry weight). Under such conditions, mixing a water-soluble substrate composition with a surfactant and a microcapsule composition comprising a polymer encapsulating at least a fragrance component in appropriate proportions produces a liquid that, after being poured onto a drying plate or drying container and after the excess water has evaporated, produces solid flakes or granules that retain flexibility and water solubility.

[0071] Microcapsule Composition

[0072] In the context of this invention, the shell of the core-shell microcapsule may comprise a polymer selected from melamine-formaldehyde polymers, urea-formaldehyde polymers, polyurea, polyurethane, polyamide, polyacrylate, polycarbonate, and mixtures thereof.

[0073] thermosetting resins

[0074] Core-shell microcapsules with melamine-formaldehyde polymer shells have proven particularly suitable for fragrance encapsulation. They are described in the prior art, such as WO2008 / 098387A1, WO2016 / 207180A1, WO2017 / 001672A1 and WO2018 / 197266A1.

[0075] Suitable examples of core-shell microcapsules include a shell surrounding a core, wherein the shell comprises a network structure of a cross-linked resin, wherein the resin comprises a terpolymer and a polymer stabilizer, wherein the terpolymer comprises a portion derived from at least one polyamine; a portion derived from a milk protein or a milk protein derivative; and a portion derived from an alkylene and alkoxyene portion having 1-6 methylene units.

[0076] Core-shell microcapsules with polyurea or polyurethane polymer shells have also been successfully used for fragrance encapsulation. They offer the advantage of addressing consumer concerns about formaldehyde residues in compositions. Such capsules are also described in existing technologies, such as WO2016 / 071151A1 and WO2019 / 174978A1.

[0077] In one embodiment, the shell comprises a thermosetting resin formed by reacting a polyfunctional amine containing at least one amino group with at least one polyfunctional isocyanate, wherein the shell further comprises a cationic polymer containing a quaternary ammonium group, and wherein the shell further comprises a polymer stabilizer containing fully or partially dissociated carboxylic acid groups, such as those described in WO2023 / 017014A1.

[0078] Core-shell microcapsules with polyacrylate (i.e., one or more monoolefinically unsaturated and / or polyolefinically unsaturated monomers in polymeric form) shells have also been successfully used for fragrance encapsulation. Such capsules are described in the prior art, such as WO2013 / 111912A1 or WO2014 / 032920A1.

[0079] In one embodiment, the core-shell microcapsule comprises a shell containing a thermosetting resin formed by reacting a shell-forming monomer containing a polyamine with a material containing a plurality of olefinic double bonds capable of reacting with the polyamine, such as those described in WO2019 / 121738A1.

[0080] polymer stabilizers

[0081] In one embodiment, the shell comprises a thermosetting resin formed by the reaction of a shell-forming material selected from monomers, prepolymers, and / or precondensates, and comprises a polymer stabilizer, which is a reaction product of a polymer surfactant and a silane containing a functional group capable of forming a covalent bond with the shell, such as those described in WO2019 / 121736A1.

[0082] In one embodiment, the shell may comprise a polymeric stabilizer formed by combining a polymeric surfactant with at least one aminosilane. The polymeric surfactant comprises a polysaccharide containing a carboxylic acid group. The aminosilane is defined below. The shell may also comprise a polysaccharide, preferably a polysaccharide comprising β(1→4) linked monosaccharide units, and even more preferably a cellulose derivative, particularly selected from hydroxyethyl cellulose, hydroxypropyl methyl cellulose, cellulose acetate, carboxymethyl cellulose, and combinations thereof, preferably hydroxyethyl cellulose. Such capsules are described in the prior art, for example in WO2020 / 233887A1.

[0083] Hydrated polymer phase and polymer stabilizer

[0084] In one embodiment, the shell may comprise a hydrated polymer phase and a polymer stabilizer at the interface between the shell and the core.

[0085] In this arrangement, the polymer stabilizer provides an impermeable encapsulating material, while the hydrated polymer phase provides the necessary deposition and adhesion to the substrate. Furthermore, without being bound by any theory, it is presumed that the hydrated polymer phase also provides an optimal attack point for microbial degradation.

[0086] The polymer stabilizer can be selected from a wide range of film-forming materials and resins. Preferably, the polymer stabilizer is highly cross-linked to significantly reduce the diffusion of the encapsulated fragrance component through the shell. Preferably, the shell is sufficiently impermeable to significantly prevent leakage of the fragrance component into the extractable matrix (e.g., consumer products containing surfactants).

[0087] In one embodiment of the invention, the polymer stabilizer is a thermosetting resin.

[0088] Thermosetting resins are typically obtained by reacting polyfunctional monomers such as amines, isocyanates, alcohols or phenols, chlorocarboxylic acids, (meth)acrylates, epoxides, silanes, and aldehydes.

[0089] In one embodiment of the invention, the polymer stabilizer is formed by reacting an aminosilane with a polyfunctional isocyanate. This polymer stabilizer has the advantage of high crosslinking and readily provides surface anchoring groups that can be used to immobilize additional materials to complete the shell formation. These additional materials may comprise additional encapsulating materials, coatings, and simple and complex coacervates and hydrogels, as described in more detail below.

[0090] The aminosilane used to form the polymer stabilizer can be selected from compounds of formula (I).

[0091] Si(R 1 (R) 2 ) f (OR 3 ) (3-f) Formula (I)

[0092] Where R 1 It is a straight-chain or branched alkyl or alkenyl residue containing an amine functional group; R 2 Each is independently a straight-chain or branched alkyl group having 1 to 4 carbon atoms; R 3 Each is independently H or a straight-chain or branched alkyl group having 1 to 4 carbon atoms; and f is 0, 1 or 2.

[0093] The silane groups can undergo a polycondensation reaction to form a silica network at the oil / water interface, which further stabilizes the interface.

[0094] In one implementation, R 2 and R 3 Each can be methyl or ethyl.

[0095] In one implementation, f is 0 or 1.

[0096] In one implementation, R 1 It is a C1-C containing amine functional groups 12 Straight-chain or branched alkyl or alkenyl residues. Optionally, R 1 It is a C1-C4 straight-chain or branched alkyl or alkenyl residue containing an amine functional group.

[0097] In one embodiment, the amine functional group is a primary amine, a secondary amine, or a tertiary amine.

[0098] In one embodiment, the at least one aminosilane is a bipodal aminosilane. "Bipodal aminosilane" refers to a molecule containing at least one amino group and two residues, each of which carries at least one alkoxysilane moiety. Bipodal aminosilanes are particularly advantageous for forming stable oil-water interfaces compared to conventional aminosilanes. Without being bound by theory, it is believed that this beneficial effect is due to the specific bidirectional arrangement of the silane moieties in the bipodal aminosilane molecule, which allows for the formation of a more tightly connected silica network at the oil-water interface.

[0099] In one embodiment, the bipodial aminosilane is a compound of formula (II).

[0100] (OR 3 ) (3-f) (R 2 ) f Si-R 4 -XR 4 -Si(OR 3 ) (3-f) (R 2 ) f Equation (II)

[0101] Where X is -NR 5 -、-NR 5 -CH2-NR 5 -、-NR 5 -CH2-CH2-NR 5 -、-NR 5 -CO-NR 5 -or ,

[0102] R 2 Each is independently a straight-chain or branched alkyl group having 1 to 4 carbon atoms;

[0103] R 3 Each is independently H or a straight-chain or branched alkyl group having 1 to 4 carbon atoms;

[0104] R 4 Each is independently a straight-chain or branched alkylene group having 1 to 6 carbon atoms;

[0105] R 5 Each independently can be H, CH3, or C2H5; and

[0106] f can be 0, 1, or 2 independently.

[0107] In one implementation, R 2 It is CH3 or C2H5.

[0108] In one implementation, R3 It is CH3 or C2H5.

[0109] In one implementation, R 4 It is -CH2-, -CH2-CH2- or -CH2-CH2-CH2-.

[0110] In one implementation, R 5 It is H or CH3.

[0111] In one implementation, f is 0 or 1.

[0112] Examples of suitable bipodial aminosilanes include, but are not limited to, bis(3-(triethoxysilyl)propyl)amine, N,N'-bis(3-(trimethoxysilyl)propyl)urea, bis(3-(methyldiethoxysilyl)propyl)amine, N,N'-bis(3-(trimethoxysilyl)propyl)ethyl-1,2-diamine, bis(3-(methyldiethoxysilyl)propyl)-N-methylamine, N,N'-bis(3-(triethoxysilyl)propyl)piperazine, and combinations thereof.

[0113] In one embodiment, the bipodial aminosilane is bis(3-(triethoxysilyl)propyl)amine, which has the advantage of releasing ethanol rather than the more toxic and less desirable methanol during the polycondensation of the ethoxysilyl group.

[0114] Bipodial aminosilanes can be secondary aminosilanes. Using secondary bipodial aminosilanes instead of primary aminosilanes reduces the reactivity of the polymer stabilizer to electrophilic species, particularly aldehydes. Therefore, fragrance components containing high levels of aldehydes can be encapsulated with a lower tendency for unfavorable interactions between the core-forming and shell-forming materials.

[0115] Other aminosilanes can also be used in combination with the above-mentioned bipod aminosilanes, especially the aminosilanes described above.

[0116] Polyfunctional isocyanates can be selected from organic isocyanates, wherein the isocyanate group is bonded to an organic residue (RN=C=O or R-NCO). Polyfunctional isocyanates can be selected from alkyl, alicyclic, aromatic and alkylaromatic and anionic modified polyfunctional isocyanates, wherein they have two or more (e.g. 3, 4, 5, etc.) isocyanate groups in one molecule, and mixtures thereof.

[0117] Preferably, the polyfunctional isocyanate is an aromatic or alkyl aromatic isocyanate, and the alkyl aromatic polyfunctional isocyanate preferably has a methyl isocyanate group attached to the aromatic ring. Compared with alkyl and alicyclic polyfunctional isocyanates, aromatic and methyl isocyanate-substituted aromatic polyfunctional isocyanates both exhibit excellent reactivity. Among them, tris((3-(isocyanomethyl)phenyl)carbamate)2-ethylpropyl-1,2,3-triyl ester is particularly preferred because of its trifunctional nature, which facilitates the formation of intermolecular crosslinks, and because of its intermediate reactivity, which is conducive to the homogeneity of the network structure. Such alkyl aromatic polyfunctional isocyanates are marketed under the trademark Takenate D-100N (sold by Mitsui) or Desmodur. ® Quix175 (sold by Covestro) - purchased commercially.

[0118] As a substitute for aromatic or alkyl aromatic polyfunctional isocyanates, the addition of anionicly modified polyfunctional isocyanates may also be advantageous, as such polyfunctional isocyanates can react at the oil / water interface or even in the aqueous phase near the oil / water interface. Particularly suitable anionicly modified polyfunctional isocyanates have formula (III).

[0119]

[0120] Equation (III)

[0121] Formula (III) shows a commercially available anionic modified polyisocyanate, which is a modified isocyanurate of hexamethylene diisocyanate, produced by Covestro under the trademark Bayhydur. ® XP2547 for sale.

[0122] In a preferred embodiment of the invention, the polyfunctional isocyanate is tris((3-(3-(isocyanomethyl)phenyl)carbamate)2-ethylpropyl-1,2,3-triyl ester. Particularly preferably, the polymer stabilizer is formed by the reaction of bis(3-(triethoxysilyl)propyl)amine and tris((3-(3-(isocyanomethyl)phenyl)carbamate)2-ethylpropyl-1,2,3-triyl ester). This specific combination of a dipodous secondary aminosilane and a polyfunctional isocyanate provides advantageous interfacial stability and release properties. The stabilized interface is sufficiently impermeable to effectively encapsulate at least one fragrance component contained in the core and has the desired surface functional groups.

[0123] In one embodiment, the shell may be as described in WO2020 / 207849A1.

[0124] In a preferred embodiment of the present invention, the hydrated polymer phase may be a coagulated layer, particularly a composite coagulated layer.

[0125] The so-called " Composite Coagulation "" refers to the formation of an interface layer containing a polyelectrolyte mixture.

[0126] The aggregation phenomenon can be observed under an optical microscope, where it is marked by the appearance of rings around the core composition droplets. These rings consist of the aforementioned polyelectrolyte-rich phase, which has a different refractive index than the surrounding aqueous phase.

[0127] Polyelectrolyte aggregation is typically induced by bringing the polyelectrolyte to its isoelectric point (meaning the point where the net charge of the polyelectrolyte is zero or close to zero). This can be achieved by altering the salt concentration or pH of the medium. In complex aggregation, aggregation occurs at a pH where one polyelectrolyte has a total positive charge (polycation) and the other has a total negative charge (polyanion), resulting in a complex with a neutral total charge.

[0128] In a preferred embodiment of the present invention, the condensed layer may be formed from polycations and polyanions.

[0129] In one embodiment, the shell may comprise a complex aggregated layer formed of at least one protein and at least one polysaccharide. Such core-shell capsules have proven suitable for encapsulating flavor ingredients and are described, for example, in WO1996 / 020612A1, WO2001 / 03825A1, or WO2015 / 150370A1.

[0130] Preferably, pH is used as the parameter driving aggregation. Therefore, polycations preferably have pH-dependent charges. This is the case for polymers with primary, secondary, and tertiary amino groups, such as polyamines, for example chitosan, and most proteins, such as gelatin. Proteins have the additional advantage of readily undergoing temperature-dependent structural transitions, which can also be used to control the morphology of aggregated layers. In particular, changing the temperature of some proteins can induce the formation of secondary, tertiary, or quaternary structures, which can also be used to control the properties of aggregated layers.

[0131] Chitosan has the advantages of being derived from chitin, a natural polymer.

[0132] In a preferred embodiment of the present invention, the polycation is selected from proteins, chitosan, and combinations thereof.

[0133] More specifically, the polycation can be a protein selected from gelatin, casein, albumin, polylysine, soy protein, pea protein, rice protein, hemp protein, and combinations thereof.

[0134] In a particularly preferred embodiment of the invention, the at least one protein is gelatin, or even more preferably type B gelatin.

[0135] Type B gelatin can be obtained from the alkaline treatment of collagen and is well known for its ability to form complexes with anionic polyelectrolytes (such as negatively charged polysaccharides) under mildly acidic conditions.

[0136] Gelatin is typically characterized by what is known as "Bloom strength" (or "bloom strength"). Bloom Strength In the context of this invention, Bloom strength refers to the stiffness of the gel film, as measured by a so-called “Bloom gel meter” according to Chapter 2.1 of the Official Procedures of the Gelatin Manufacturers Institute of America, Inc., revised 2019. According to this procedure, Bloom strength is measured in Bloom (… Bloom The Bloom strength, expressed in grams, is equal to the weight required to vertically move a standardized plunger with a diameter of 12.5 mm into a gelatin gel at a depth of 4 mm. This gelatin gel is prepared under controlled conditions, specifically by dissolving 6.67 wt% gelatin in deionized water at 60°C in a standardized vessel and allowing the gel to form at 10°C for 17 hours. Higher weight values ​​indicate higher Bloom strength of the gelatin used to prepare the test gel.

[0137] In a preferred embodiment of the invention, the Bloom strength of type B gelatin is 90 to 250 Blooms.

[0138] If the Bloom strength is too low, the gel will be mechanically weak, and the resulting cohesive layer may not form a self-standing layer of gelatin-rich phase around the core composition. If the Bloom strength is too high, the resulting cohesive layer and gelatin-rich phase may be too brittle.

[0139] In a preferred embodiment of the invention, type B gelatin can be obtained from fish because fish gelatin is more readily accepted by consumers than beef or pork gelatin, primarily due to health concerns, sociological context, or religious rules.

[0140] Alternatively, the protein can be a plant protein, particularly pea protein and / or soy protein, which has the advantage of being vegetarian.

[0141] Polycations can be denatured proteins. Unlike native proteins, denatured proteins have been deprived of the ability to form secondary, tertiary, or quaternary structures and are essentially amorphous. These amorphous proteins can form more impermeable membranes compared to native proteins, thus also contributing to the encapsulation ability of the shell. Denaturation can be achieved by treating proteins chemically or physically, such as with acids or bases, heating, or exposure to hydrogen bond disruptors.

[0142] When the polycation is chitosan, the molecular weight of chitosan can be from 3,000 to 1,000,000 g / mol, more particularly from 10,000 to 500,000 g / mol, and even more particularly from 30,000 to 300,000 g / mol.

[0143] Polyanionic polymers can be any negatively charged polymer. However, since pH is preferably used to control aggregation, it may be more advantageous if the polymer's charge is pH-dependent. Such polymers can be selected from polymers with side-chain carboxyl groups, such as methacrylic acid and acrylic acid polymers and copolymers, hydrolyzed maleic anhydride copolymers, and carboxyl-containing polysaccharides.

[0144] In a preferred embodiment of the invention, the polyanion is a polysaccharide containing carboxyl groups and / or sulfate groups.

[0145] Polysaccharides containing carboxylate groups are particularly well-suited for complexation and aggregation with proteins. This is due to the fact that the net charge of these polysaccharides can be modulated by adjusting the pH, thereby promoting complexation with amphoteric proteins. Complexation occurs at a pH where the protein has an overall positive charge and the polysaccharide has an overall negative charge, resulting in a neutral overall charge of the complex. These polysaccharides include unmodified natural polysaccharides and modified polysaccharides from nature.

[0146] Polysaccharides containing carboxylic acid groups can contain uronic acid units, especially hexuronic acid units. These polysaccharides are widely available in nature.

[0147] The hexuronic acid unit can be selected from galacturonic acid unit, glucuronic acid unit, especially 4-O-methyl-glucuronic acid unit, guluronic acid unit, mannuronic acid unit, and combinations thereof.

[0148] Polysaccharides containing carboxylic acid groups can be branched. Branched polysaccharides containing carboxylic acid groups have the advantage of forming a more compact network structure than linear polysaccharides, which can improve the impermeability of the encapsulation shell, thereby reducing leakage and improving encapsulation efficiency.

[0149] The carboxylate group can exist at least partially in the form of the corresponding carboxylate, particularly the corresponding sodium, potassium, magnesium, or calcium carboxylate.

[0150] In a particular embodiment of the invention, the polyanion is selected from pectin, gum arabic, alginate, and combinations thereof.

[0151] In pectin, carboxylic acid groups may be present partially in the form of the corresponding methyl esters. The percentage of carboxylic acid groups present in the form of the corresponding methyl esters can be 3% to 95%, preferably 4% to 75%, more preferably 5% to 50%. Pectin containing 50% or more of the carboxyl groups present in the form of the corresponding methyl esters is called "highly methoxylated". Pectin containing less than 50% of the carboxylic acid groups present in the form of the corresponding methyl esters is called "lowly methoxylated".

[0152] Of the two variants of gum arabic, Senegal gum arabic and Seyal gum arabic, Senegal gum arabic is preferred because it has a higher level of glucuronic acid.

[0153] The hydrated polymer phase can be a hydrogel.

[0154] In the context of this invention, " hydrogel "It is a three-dimensional (3D) network structure of hydrophilic polymers that can swell in water while maintaining its structure due to the chemical or physical cross-linking of individual polymer chains.

[0155] This hydrogel can be formed through several methods, particularly through the self-assembly of polyelectrolytes around existing interfaces, covalent grafting of pre-formed hydrogel particles in solution, polymerization of water-soluble monomers initiated at the interface, and phase separation of water-soluble macromolecules at the interface.

[0156] To avoid any ambiguity, in the context of this invention, particularly covalently cross-linked aggregates, especially composite aggregates, are considered hydrogels.

[0157] The applicant has found that the use of hydrogels particularly enhances the deposition and adhesion of microcapsules on substrates, especially on fabrics.

[0158] Hydrogels can interconnect with polymer stabilizers, particularly through functional groups present on the surface of the stabilizer.

[0159] This allows the hydrogel layer to be locked onto the polymer stabilizer present at the droplet interface, so that the shell is composed of a polymer composite material rather than just a blend.

[0160] Hydrogel crosslinking and the interconnection between the hydrogel and the polymer stabilizer can occur sequentially or simultaneously.

[0161] In a preferred embodiment of the invention, the hydrogel is a cross-linked cohesive layer, particularly a composite cohesive layer cross-linked with a polyfunctional aldehyde, more particularly a difunctional aldehyde selected from succinal, glutaraldehyde, glyoxal, phenyl-1,2-dialdehyde, phenyl-1,3-dialdehyde, phenyl-1,4-dialdehyde, piperazine-N,N-dialdehyde, 2,2'-bipyridine-5,5'-dialdehyde, and combinations thereof. Difunctional aldehydes are known to be effective cross-linking agents for proteins.

[0162] WO2021 / 239742A1 describes the cross-linking of at least one protein with a first cross-linking agent, followed by the addition of at least one polysaccharide to form a composite aggregate layer.

[0163] The hydrogel can be heat-sensitive and has a gelation temperature, particularly between 20°C and 50°C, preferably between 25°C and 40°C. When using such a hydrogel, the deposition performance of the capsules on the fabric can be increased when the fabric is washed at a temperature higher than the hydrogel's gelation temperature.

[0164] The shell can be further stabilized with a stabilizer. Preferably, the stabilizer contains at least two carboxylic acid groups. Even more preferably, the stabilizer is selected from citric acid, phenyl-1,3,5-tricarboxylic acid, phenyl-1,2,4-tricarboxylic acid, 2,5-furandicarboxylic acid, itaconic acid, poly(itaconic acid), and combinations thereof.

[0165] In one embodiment, the core-shell microcapsule may be as described in WO2023 / 020883A1.

[0166] In one embodiment, the shell comprises a polymeric stabilizer formed by combining a polymeric surfactant with at least one aminosilane; a hydrocolloid; and a linker derived from an epoxy resin. The polymeric surfactant and at least one aminosilane are as defined above. In one embodiment, the hydrocolloid is selected from polysaccharides, such as pectin, modified starch, guar gum, locust bean gum, konjac mannan, gum arabic, gum arabic, tragacanth, agar, alginate, and carrageenan; proteins such as gelatin; and combinations thereof. In one embodiment, the epoxy resin is selected from epoxidized vegetable oils, epoxidized alcohols, epoxidized furans, epoxidized phenols, and combinations thereof.

[0167] In one embodiment, the core-shell microcapsule may be as described in WO 2023 / 170102A1.

[0168] In one embodiment, the shell comprises first and second polyelectrolytes forming a composite cohesive layer, and the microcapsule comprises at least one interfacial enabler. In one embodiment, the interfacial enabler is or is derived from a diacid or dialdehyde, such as the shell described in WO2022 / 112204A1.

[0169] In one embodiment, the shell of the microcapsule may be made of a biodegradable or non-biodegradable material. In one embodiment, the microcapsule is made of a biodegradable material.

[0170] In a preferred embodiment of the invention, the median volume diameter Dv(50) of the plurality of core-shell microcapsules is 1 to 100 μm, preferably 5 to 75 μm, more preferably 8 to 60 μm, and even more preferably 10 to 30 μm. Microcapsules with a median volume diameter in the range of 10 to 30 μm show optimal deposition on a variety of substrates such as fabrics and hair.

[0171] Fragrance ingredients

[0172] A comprehensive list of flavoring ingredients that can be encapsulated according to the present invention can be found in flavoring literature, such as " Perfume & Flavor Chemicals"S. Arctander (Allured Publishing, 1994). The fragrance ingredients encapsulated according to the invention preferably comprise fragrance ingredients selected from the following: acetyl isoeugenol (acetic acid (E)-2-methoxy-4-(prop-1-en-1-yl)phenyl ester); adocal (2,6,10-trimethylundec-9-enal); AGRUMEX (acetic acid 2-(tert-butyl)cyclohexyl ester); C10 decanal (decanal); C11 MOA aldehyde (2-methyldecanal); C11 undecenal (undec-10-enal); C110 undecenal (undecenal); C12 lauraldehyde (dodecenal); C12 MNA aldehyde (2-methylundecaldehyde); C8 octanal; C9 isononanal (3,5,5-trimethylhexanal); food grade C9 nonanal; C90 nonenal ((E)-non-2-enal); isoc11 aldehyde ((E)-undec-9-enal); rutinal ((E)-dodec-2-enal); allyl pentyl glycolate (2-(3-methylbutoxy)acetic acid prop-2-enyl ester); allyl hexanoate (prop-2-enyl hexanoate); cyclohexylpropionic acid Ester (3-cyclohexylpropionic acid prop-2-enyl ester); Allyl heptaate (prop-2-enyl heptaate); Amber core 1-((2-(tert-butyl)cyclohexyl)oxy)but-2-ol ambroxol acetal (3,8,8,11a-tetramethyldodecyl-1H-3,5a-epoxynaphtho[2,1-c]oxacycloheptatriene); Premium ambroxol (2-(2,2,7,7-tetramethyltricyclo[6.2.1.0](1,6)undec-4-en-5-yl)prop-1-ol and 2- (2,2,7,7-Tetramethyltricyclo[6.2.1.0](1,6)undec-5-en-5-yl)prop-1-ol); anolyl lactone ((Z)-oxacycloheptadec-10-en-2-one); ammonium bromide ((3aR,5aS,9aS,9bR)-3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1H-benzo[e][1]benzofuran); amyl butyrate (amyl butyrate); pentyl cinnamaldehyde (( Z)-2-benzylheptanal); Amyl salicylate (2-hydroxybenzoic acid pentyl ester); Synthetic anethole ((E)-1-methoxy-4-(prop-1-en-1-yl)benzene); Anisyl acetate (4-methoxybenzyl acetate); Averman ester (1-(3,3-dimethylcyclohexyl)ethyl formate); Anisaldehyde p-cresol (4-methoxybenzaldehyde); Nerolidin ((E)-2-((7-hydroxy-3,7-dimethyloctyl)amino)methyl benzoate); BELAMBRE ((1R,2S,4R)-2'-isopropyl-1,7,7-trimethylspiro[bicyclo[2.2.1]heptane-2,4'-[1,3]dioxane]); Benzaldehyde (benzaldehyde); Benzyl acetate (benzyl acetate); Benzylacetone (4-phenylbut-2-one);Benzyl benzoate (Benzyl benzoate); Benzyl salicylate (Benzyl 2-hydroxybenzoate); Berryfu (Ethyl 6-acetoxyhexanoate); Bicyclononolactone (Octahydro-2H-chromene-2-one); Ethoxycyclododecyloxymethane ((ethoxymethoxy)cyclododecane); Bosley ((1S,2R,5R)-2-ethoxy-2,6,6-trimethyl-9-methylenebicyclo[3.3.1]nonane); Borneol crystals ((1S,2S,4S)-1,7,7-trimethylbicyclo[2.2.1]hep-2-ol); Borneol acetate ((2S,4S)-1,7,7-trimethylbicyclo[2.2.1]hep-2-yl ester); Bojiehongaldehyde (3-( 4-(tert-butyl)phenyl)propanal); Butyl butyryl lactate (1-butoxy-1-oxopropyl-2-yl butyrate); p-Butylcyclohexyl acetate (4-(tert-butyl)cyclohexyl acetate); sec-Butylquinoline (2-(2-methylpropyl)quinoline); Synthetic camphor ((1S,4S)-1,7,7-trimethylbicyclo[2.2.1]hepta-2-one); Carvacrol (5-isopropyl-2-methylphenol); L-carvacrol ((5R)-2-methyl-5-prop-1-en-2-ylcyclohex-2-en-1-one); Cashmereone (1,1,2,3,3-pentamethyl-2,3,6,7-tetrahydro-1H-indene-4(5H)-one); CASSYRANE (5-tert-butyl-2-methyl-5-propyl-2H-furan); cypressene ((1S,8aR)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methylenechalcogenide); cypressene acetate ((1S,6R,8aR)-1,4,4,6-tetramethyloctahydro-1H-5,8a-methylenechalcogenide-6-yl ester); cypressene methyl ether ((1R,6S,8aS)-6-methoxy-1,4,4,6-tetramethyloctahydro-1H-5,8a-methylenechalcogenide); Allyl ionone ((E)-1-(2,6,6-trimethylcyclohexyl-2-en-1-yl)hept-1,6-dien-3-one); synthetic cinnamyl alcohol ((E)-3-phenylprop-2-en-1-ol); cinnamaldehyde ((2E)-3-phenylprop-2-enal); cinnamyl acetate ((E)-3-phenylprop-2-en-1-yl acetate); cis-jasmone ((Z)-3-methyl-2-(pent-2-en-1-yl)cyclopent-2-enone); cis-3-hexenol ((Z)-hex-3-en-1-ol); citral TECH ((E)-3,7-dimethyloctyl-2,6-dienal); Limonene diacetal R ((Z)-1,1-diethoxy-3,7-dimethyloctyl-2,6-diene); Citronellol (3,7-dimethyloctyl-6-enal); Extra citronellol (3,7-dimethyloctyl-6-en-1-ol); Citronellol acetate (3,7-dimethyloctyl-6-en-1-yl acetate);Citronellol formate (3,7-dimethyloct-6-en-1-yl formate); Citronellol (3,7-dimethyloct-6-en-nitrile); Dodecanone; Corona alcohol (4-cyclohexyl-2-methylbut-2-ol); Musk ((Z)-3-methylcyclotetradec-5-enone); Coumarin crystals (2H-chromen-2-one); p-cresol acetate (4-methylphenyl acetate); p-cresol methyl ether (1-methoxy-4-methylbenzene); Cuminone (4-isopropylbenzonitrile); Privet aldehyde (2,4-dimethylcyclohexyl-3-en-1-carboxaldehyde); Extra grade rabbit ear aldehyde (3-(4-isopropylphenyl)-2-methylpropanal); Cyclopentazone (2-(cyclohexyloxy)acetic acid allyl ester); Cyclohexylethyl acetate (2-cyclohexylethyl acetate) esters); cyclohexyl salicylate (cyclohexyl 2-hydroxybenzoate); cyclohexenealdehyde (8,8-dimethyl-1,2,3,4,5,6,7,8-octahydronaphthalene-2-carboxaldehyde); cymene (1-methyl-4-prop-2-ylbenzene); daumatenone ((E)-1-(2,6,6-trimethylcyclohexyl-1,3-dien-1-yl)but-2-en-1-one); alpha-daumatenone Ketone ((E)-1-(2,6,6-trimethylcyclohexyl-2-en-1-yl)but-2-en-1-one); butyl-dextrin (1-(2,6,6-trimethyl-1-cyclohexyl-3-en-yl)but-2-en-1-one); propyl-decanolide (5-hexyloxacyclopentan-2-one); trans-4-decenal ((E)-dec-4-enal); DELPHONE (2-Pentylcyclopentanone); δ-3-carene ((1S,6S)-3,7,7-trimethylbicyclo[4.1.0]hept-3-ene); dihexyl fumarate (dihexyl-but-2-enediate); dihydroanisole (1-methoxy-4-propylbenzene); dihydrojasmone (3-methyl-2-pentylcyclopentanone); dihydromyrcenol (2,6-dimethyloct-7-en-2-ol); dimethyl anthranol (2-(methylamino)benzoate); dimethylbenzylmethanol (2-methyl-1-phenylprop-2-ol); dimethyl benzyl acetate (2-methyl-1-phenylprop-2-yl acetate); dimethyl benzyl butyrate 2-methyl-1-phenylprop-2-yl butyrate; dimethyloctenone (4,7-dimethyloct-6-en-3-one); dimethylheptanol (2,6-dimethylheptanol); limonene (1-methyl-4-(prop-1-en-2-yl)cyclohex-1-ene); diphenyl ether (diphenyl ether); butyl dodecanolide (6-heptyltetrahydro-2H-pyran-2-one); propionyl dodecanolide (5-octyloxacyclopentan-2-one); dodecenoal ((E)-dodecenoal); Doubicarb ((E)-4-((3aS,7aS)-hexahydro-1H-4,7-methyleneinden-5(6H)-ylidene)butyraldehyde);Ebony alcohol ((E)-3-methyl-5-(2,2,3-trimethylcyclopent-3-en-1-yl)pent-4-en-2-ol); ESTERLY (ethyl cyclohexyl carboxylate) carboxylate); ethyl acetate; ethyl acetoacetate (ethyl 3-oxobutyrate); ethyl cinnamate (ethyl 3-phenylprop-2-enoate); ethyl hexanoate (ethyl hexanoate); ethyl linalool ((E)-3,7-dimethylnonan-1,6-dien-3-ol); ethyl linaloacetate ((Z)-3,7-dimethylnonan-1,6-dien-3-yl acetate); ethyl maltol (2-ethyl-3-hydroxy-4H-pyran-4-one); ethyl methyl-2-butyrate (ethyl 2-methylbutyrate); ethyl octanoate (ethyl octanoate); ethyl heptanoate (ethyl heptanoate); ethyl phenyl glycidyl ester (ethyl 3-phenylethylene oxide-2-carboxylate); ethyl saffron (2,6,6-trimethylcyclohexane-1, Ethyl 3-diene-1-carboxylate; Ethyl vanillin (3-ethoxy-4-hydroxybenzaldehyde); Ethyl brassinate (1,4-dioxane-5,17-dione); Eucalyptol ((1s,4s)-1,3,3-trimethyl-2-oxabicyclo[2.2.2]octane); Eugenol (4-allyl-2-methoxyphenol); Synthetic oakmoss (methyl 2,4-dihydroxy-3,6-dimethylbenzoate); Fenyl acetate ((2S)-1,3,3-trimethylbicyclo[2.2.1]hept-2-yl acetate); Fenyl alcohol ((1S,2R,4R)-1,3,3-trimethylbicyclo[2.2.1]hept-2-ol); Anisaldehyde (3-(4-methoxyphenyl)-2-methylpropanal); FIXAMBRENE (3a,6,6,9a-Tetramethyldodecanonaphtho[2,1-b]furan); Thunbergi (1-(3,5,5,6,8,8-hexamethyl-5,6,7,8-tetrahydronaphtho-2-yl)acetone); haifeng aldehyde (3-(4-ethylphenyl)-2,2-dimethylpropionaldehyde); anthocyanin (3-(3-isopropylphenyl)butanal); FLORIDILE ((E)-undecano-9-enonitrile); tricyclodecenyl propionate (propionate (3aR,6S,7aS)-3a,4,5,6,7,7a-hexahydro-1H-4,7-methyleneindenyl ester); florpyran (2,4,6-trimethyl-4-phenyl-1,3-dioxane); lily of the valley pyran HC (Tetrahydro-4-methyl-2-(2-methylpropyl)-2H-pyran-4-ol); Menthone (2-(sec-butyl)cyclohexanone); Apple ester (2-(2-methyl-1,3-dioxacyclopentan-2-yl)ethyl acetate); Fructose ester ((3aS,4S,7R,7aS)-octahydro-1H-4,7-methyleneinden-3a-carboxylic acid ethyl ester); Fruit nitrile (2-methyldecanoic acid);Gleponone (1-(5,5-dimethylcyclohexyl-1-en-1-yl)pent-4-en-1-one); Styrax ester acetate (1-phenylethyl acetate); Tricyclodecenyl isobutyrate (2-methylpropionic acid (3aR,6S,7aS)-3a,4,5,6,7,7a-hexahydro-1H-4,7-methyleneinden-6-yl ester); Geraniol ((E)-3,7-dimethyloct-2,6-dien-1-ol); Geraniyl acetate ((E)-3,7-dimethyloct-2,6-dien-1-yl acetate); Geraniyl crotonate (but-2-enoic acid (E)-3,7-dimethyloct-2,6-dien-1-yl ester); Geraniyl isobutyrate (2-methylpropionic ... -1-yl ester); Chihualinone (ethyl 2-ethyl-6,6-dimethylcyclohexyl-2-encarboxylate); Cyclopentadene lactone ((E)-oxacyclohexadecano-12-en-2-one); Methyl dihydrojasmine ester (methyl 3-oxo-2-pentylcyclopentane acetate); Jasminal crystals (benzo[d][1,3]dioxacyclopentadien-5-carboxaldehyde); Shampoo ester ((2S)-3-isopropylbicyclo[2.2.1]hept-5-en-2-carboxylate); trans-2-hexenal ((E)-hex-2-enal); cis-3-hexenol ((Z)-hex-3-en-1-ol); cis-3-hexenyl acetate ((Z)-hex-3-en-1-yl acetate); cis-3-hexenyl butyrate ((Z)-hexenyl butyrate) -3-en-1-yl ester); cis-3-hexenyl isobutyrate (2-methylpropionic acid (Z)-hex-3-en-1-yl ester); cis-3-hexenyl salicylate (2-hydroxybenzoic acid (Z)-hex-3-en-1-yl ester); hexyl acetate (hexyl acetate); hexyl benzoate (hexyl benzoate); hexyl butyrate (hexyl butyrate); hexyl cinnamaldehyde ((E)-2-benzyl octanal); hexyl isobutyrate (2-methylpropionic acid hexyl ester); hexyl salicylate (2-hydroxybenzoic acid hexyl ester); hydroxycitronellol (7-hydroxy-3,7-dimethyloctanal); indole (4,4a,5,9b-tetrahydroindo[1,2-d][1,3]dioxin); indole (1H-indole); indoleene (8,8-di(1H-indole) -3-yl)-2,6-dimethyloct-2-ol); ethyl ionone ((E)-4-(2,6,6-trimethylcyclohex-1-en-1-yl)but-3-en-2-one); angelone ((E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); methyl ionone ((E)-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); methyl irisone ((E)-4-(2,5,6,6-tetramethylcyclohex-2-en-1-yl)but-3-en-2-one); ambergris (1-(2,3,8,8-tetramethyl-1,2,3,4,5,6,7,8-octahydronaphthyl-2-yl)ethyl ketone);Isoamyl acetate (3-methylbutyl acetate); Isoamyl butyrate (3-methylbutyl butyrate); Isobutylmethoxypyrazine (2-methylpropyl-3-methoxypyrazine); Isocyclocitral (2,4,6-trimethylcyclohexyl-3-enaldehyde); Isoeugenol ((E)-2-methoxy-4-(prop-1-en-1-yl)phenol); Isojasmone B11 (2-hexylcyclopent-2-en-1-one); Isomenthone DL (2-Isopropyl-5-methylcyclohexanone); Isononyl acetate (3,5,5-trimethylhexyl acetate); Isopropyl methyl-2-butyrate (2-methylbutyrate); Isopropylquinoline (6-isopropylquinoline); Isomethylionone ((E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); Tricyclodecenyl acetate ((3aR,6S,7aS)-3a,4,5,6,7,7a-hexahydro-1H-4,7-methyleneinden-6-yl acetate); Cis-jasmone ((Z)-3-methyl-2-(pent-2-en-1-yl)cyclopent-2-enone); Jasmone ester (3-butyl-5-methyltetrahydro-2H-pyran-4-yl ester); Jasmone pyran (3-pentyltetrahydro-2H-pyran-4-yl ester); Javanese sandalwood ((1-methyl-2-((1,2,2-trimethylbicyclo[3.1.0]hexane-3-yl)methyl)cyclopropyl)methanol); High aromatics ((Z)-3,4,5,6,6-pentamethylhept-3-en-2-one); LAITONE (8-Isopropyl-1-oxaspiro[4.5]dec-2-one); Leaf alcohol acetal ((Z)-1-(1-ethoxyethoxy)hex-3-ene); Citrin ((2E,6Z)-3,7-dimethylnonan-2,6-dienonitrile); Chlorophyll ((Z)-hex-3-en-1-methyl carbonate); Lily aldehyde (3-(4-(tert-butyl)phenyl)-2-methylpropanal); Linalool (3,7-dimethyloct-1,6-dien-3-ol); Linalool oxide (2-(5-methyl-5-vinyltetrahydrofuran-2-yl)prop-2-ol); Linalyl acetate (3,7-dimethyloct-1,6-dien-3-yl acetate); MAHONIAL ((4E)-9-hydroxy-5,9-dimethyl-4-decenal); maltol (3-hydroxy-2-methyl-4H-pyran-4-one); maltol isobutyrate (2-methylpropionic acid 2-methyl-4-oxo-4H-pyran-3-yl ester); chamomile ester (2-methylvalerate ethyl ester); lily of the valley alcohol ((4-isopropylcyclohexyl)methanol); rose alcohol (3-methyl-5-phenylpentan-1-ol); melonaldehyde (2,6-dimethylheptane-5-enal); mercapto-8-menthane-3-one (mercapto-p-menthane-3-one); methyl anthranilate (2-aminobenzoate methyl ester); methyl benzoate (methyl benzoate);Methyl cypress ketone (1-((1S,8aS)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methylenechalcogenide-7-yl) ethyl ketone); methyl cinnamate (methyl 3-phenylprop-2-enoate); methyl tantalize (2-ethoxy-4-(methoxymethyl)phenol); methyl dihydroisojasmonate (methyl 2-hexyl-3-oxocyclopentane-1-carboxylate); methyl heptenone (6-methylhept-5-en-2-one); methyl lactone (8-methyl-1- Ozaspiro[4.5]dec-2-one); Methyl nonyl ketone (undecane-2-one); Methyl octyne carboxylate (non-2-ynyl methyl ester); cyclohexane (6,6-dimethoxy-2,5,5-trimethylhex-2-ene); Methyl salicylate (methyl 2-hydroxybenzoate); Muscone ((Z)-3-methylcyclopentadecano-5-enone); Citric acid aldehyde (4-(4-methylpent-3-en-1-yl)cyclohex-3-encarbaldehyde); Myrcene (7-methyl-3-methyleneoctyl-1,6-diene); MYSTIKAL (2-Methylundecanoic acid); cyclopentanone (2-(2-(4-methylcyclohex-3-en-1-yl)propyl)cyclopentanone); citronellol (2-methyl-6-methylene oct-7-en-2-yl acetate); NEOCASPIRENE EXTRA (10-isopropyl-2,7-dimethyl-1-oxaspiro[4.5]dec-3,6-diene); methyl ((E)-non-2-enoate); NEROLIDYLE ((2Z)-3,7-dimethyloct-2,6-dien-1-ol); nerolidol ((Z)-3,7,11-trimethyldodec-1,6,10-trien-3-ol); NEROLIDYLE (Z)-3,7,11-trimethyldodec-1,6,10-trien-3-yl acetate); 2-ethoxynaphthalene ether crystals; neonerol (1-(3-methylbenzofuran-2-yl)acetone); nerol acetate (Z)-3,7-dimethyloctyl-2,6-dien-1-yl acetate); NIRVANOLIDE ((E)-13-methyloxetane-10-en-2-one); nonadienal ((2E,6Z)-non-2,6-dienal); 2,6-nonadienol ((2Z,6E)-2,6-nonadien-1-ol); nonadienol (6,8-dimethylnon-2-ol); propylnonalactone (5-pentyloxetane-2-one); cis-6-nonenal ((Z)-non-6-enal); cis-6-nonenol ((Z)-non-6-en-1-ol); nymethylene acetate (2-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethyl acetate); NYMPHEAL (3-(4-(2-methylpropyl)-2-methylphenyl)propanal); octyl lactone (6-propyltetrahydro-2H-pyran-2-one); methylhexyl one (oct-2-one);Sweet orange crystals (1-(2-naphthyl)-acetone); Iris ketone (4-(tert-amyl)cyclohexanone); Ethyl phenethyl methyl ether ((2-methoxyethyl)benzene); p-tert-butylcyclohexyl acetate (4-(tert-butyl)cyclohexyl acetate); Fruit amide (2-ethyl-N-methyl-N-(m-tolyl)butyramide); Prunal (5-heptyldihydrofuran-2(3H)-one); Geraniol (2-methyl-4-methylene-6-phenyltetrahydro-2H-pyran); Tetrahydrogeraniol (3,7-dimethyloctyl-1-ol); Paeonyl nitrile (2-cyclohexylene-2-phenylacetonitrile); PETALIA (2-Cyclohexyl-2-(o-tolyl)acetonitrile); Farolinone (2-cyclohexylhept-1,6-dien-3-one); Phenoxyethyl isobutyrate (2-methylpropionic acid 2-(phenoxy)ethyl ester); Phenylacetaldehyde (2-phenyl-acetaldehyde); Phenylacetyl acetate (2-phenylethyl acetate); Phenylacetylethanol (2-phenylethanol); Phenylacetyl isobutyrate (2-methylpropionic acid 2-phenylethyl ester); Phenylacetylphenyl acetate (2-phenylethyl... 2-Phenylacetyl ester); phenylpropanol (3-phenylprop-1-ol); methyl pinene (2,6,6-trimethylbicyclo[3.1.1]hept-2-ene); ethyl pinene (6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane); pine acetaldehyde (3-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)propanol); neorose ester (2,2-dimethyl-2-phenylethyl propionate); POMAROSE ((2E,5E)-5,6,7-trimethyloct-2,5-dien-4-one); POMELOL (2,4,7-trimethyl-6-octen-1-ol); methyl citric acid B (1-Methyl-4-(4-methylpent-3-en-1-yl)cyclohex-3-encarbaldehyde); isopentenyl acetate (3-methylbut-2-en-1-yl acetate); coconut aldehyde (5-pentyldihydrofuran-2(3H)-one); super saffron alcohol ((E)-2-ethyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)but-2-en-1-ol); raspberry ketone (4-(4-hydroxyphenyl)but-2-one); cyclic ether (2,4-dimethyl-4-phenyltetrahydrofuran); crystalline rose (2,2,2-trichloro-1-phenylethyl acetate); 9-decenol (dec-9-en-1-ol); rose ether (4-methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H-pyran); rose ether CO (4-Methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H-pyran); ROSYFOLIA (1-methyl-2-(5-methylhex-4-en-2-yl)cyclopropylmethanol); Aromatic rose ether (4-methyl-2-phenyl-3,6-dihydro-2H-pyran); Indene (2,3,3-trimethyl-1-indone); Crocinaldehyde (2,6,6-trimethylcyclohex-1,3-dienaldehyde);Premium Sandalwood (3-methyl-5-(2,2,3-trimethylcyclopentan-3-en-1-yl)pentan-2-ol); Scentaurus Clean ((Z)-2-acetyl-4-methyltridecano-2-enoic acid ethyl ester); Scentaurus Juicy (4-(dodecylthio)-4-methylpentan-2-one); White musk (cyclopropanecarboxylic acid 2-(1-(3,3-dimethylcyclohexyl)ethoxy)-2-methylpropyl ester); Cyclohexadecanolide (cyclopentadecanone, hexadecanolide); Silver aldehyde (2-methyl-3-[4-(2-methylpropyl)phenyl]propanal); Spirocyclogone (1-(spiro[4,5]dec-6-en-7-yl)pent-4-en-1-one); Olivetrine ((E)-5-methylhept-3-one oxime); Styrax acetate (1-phenylethyl acetate); Super lily of the valley ((E)-6-ethyl-3-methyloct-6-en-1-ol); Yucca musk (cyclopropanecarboxylic acid 2-(1-(3,3-dimethylcyclohexyl)ethoxy)-2-methylpropyl ester); Cyclohexadecanolide (cyclohexadecanolide) E-2-((3,5-dimethylhex-3-en-2-yl)oxy)-2-methylpropyl ester; methyl-4-propane-2-ylcyclohex-1,3-diene; propyl-4-propane-2-ylcyclohex-1,4-diene; terpineol (2-(4-methylcyclohex-3-en-1-yl)propane-2-ol); methyl-1-terpineol (2-(4-methyl-1-cyclohex-3-en-1-yl)propane-2-ol); terpineol (2-(4-methylcyclohex-3-en-1-yl)propane-2-ol); terpineol (1-methyl-4-(propane-2-ethylene)cyclohex-1-ene); acetic acid pine ester (2-(4-methyl-1-cyclohexyl-3-enyl)prop-2-yl ester); tetrahydrolinalool (3,7-dimethyloct-3-ol); tetrahydromyrcenol (2,6-dimethyloct-2-ol); Tibetan musk (oxetane-2-one); thymol (2-isopropyl-5-methylphenol); cyclopropyl anisole (1-(cyclopropylmethyl)-4-methoxybenzene); tricyclic terpene aldehyde (2,4-dimethylcyclohexyl-3-encarbaldehyde); tridecene-2-onitrile ((E)-tridecene-2-enenone); neoprivet aldehyde (3-phenylbutanal); neojasmine aldehyde (3-(benzo[d][1,3]dioxane-2-dioxane-2-yl) (en-5-yl)-2-methylpropanal); Neojasmine aldehyde (3-(benzo[d][1,3]dioxanepentadien-5-yl)-2-methylpropanal); Undecanetriene ((3E,5Z)-undecane-1,3,5-triene); Methyldecenol ((E)-4-methyldec-3-en-5-ol); Vanillin (4-hydroxy-3-methoxybenzaldehyde); Vanillone (2,2,5-trimethyl-5-pentylcyclopentanone); Cyclohexadecenone ((Z)-cyclohexadecane-5-enone); Iononitrile ((2E,6Z)-non-2,6-dienonitrile); Diethylnaphthalene methyl ether (2-methoxynaphthalene); ZINARINE (2-(2,4-dimethylcyclohexyl)pyridine);BOIS CEDRE ESS CHINE; EUCALYPTUS GLOBULUS ESSCHINA; GALBANUM ESS; GIROFLE FEUILLES ESS RECT MADAGASCAR; LAVANDIN GROSSO OIL FRANCE ORPUR; MANDARIN OIL WASHEDCOSMOS; ORANGE TERPENES; PATCHOULI ESS INDONESIE; and YLANG ECO ESSENCE. These fragrance components are particularly suitable for obtaining stable and high-performance microcapsules due to their favorable lipophilicity and olfactory properties.

[0173] In one embodiment of the invention, more than 75%, preferably more than 80%, even more than 85%, even more than 90%, and even more than 95% of the fragrance components are biodegradable and selected from acetyl isoeugenol (acetic acid (E)-2-methoxy-4-(prop-1-en-1-yl)phenyl ester); adocal (2,6,10-trimethylundec-9-enal); AGRUMEX (acetic acid 2-(tert-butyl)cyclohexyl ester); C10 decanal (decanal); C11 undecenal (undec-10-enal); C110 undecenal (undecenal); C12 lauraldehyde (dodecenal); C12 MNA aldehyde (2-methylundecaldehyde); C8 octanal (octanal); premium rabbit ear grass aldehyde (3-(4-isopropylphenyl)-2-methylpropanal); isoc11 aldehyde ((E)-undec-9-enal); allyl pentyl glycolate (2-(3-methylbutoxy)acetic acid prop-2-enyl ester); allyl cyclohexyl propionate (3-cyclohexyl propionate prop-2-enyl ester); allyl heptanate (prop-2-enyl heptanate); asterolone ((Z)-oxetane-heptadec-10-en-2-one); Ambroxan ((3aR,5aS,9aS,9bR)-3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1H-benzo[e][1]benzofuran); amyl salicylate (2-hydroxybenzoic acid amyl ester); anisaldehyde p-cresol (4-methoxybenzaldehyde); benzyl acetate (benzyl acetate); benzyl salicylate (2-hydroxybenzoic acid benzyl ester); bornyl acetate (acetic acid (2S,4S)-1,7,7-trimethylbicyclo[2.2]).1] Hept-2-yl ester); carvacrol (5-isopropyl-2-methylphenol); cypermethrin ((1S,8aR)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methylenechalcogenide); cypermethrin acetate ((1S,6R,8aR)-1,4,4,6-tetramethyloctahydro-1H-5,8a-methylenechalcogenide-6-yl ester); cypermethrin methyl ether ((1R,6S,8aS)-6-methoxy-1,4,4,6-tetramethyloctahydro-1H-5,8a-methylenechalcogenide); citral ((E)-3,7-dimethyloctyl-2,6-dienal); citronellol (3,7-dimethyl Oct-6-en-1-ol); Citronellol acetate (3,7-dimethyloct-6-en-1-yl acetate); Celadon musk ((Z)-3-methylcyclotetradec-5-enone); p-cresol methyl ether (1-methoxy-4-methylbenzene); Cyclohexylethyl acetate (2-cyclohexylethyl acetate); Cyclohexyl salicylate (2-hydroxybenzoic acid cyclohexyl ester); Damasne ketone ((E)-1-(2,6,6-trimethylcyclohex-1,3-dien-1-yl)but-2-en-1-one); Alpha-damasne ketone ((E)-1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one); Propyldecyl lactone (5-hexyloxacyclopentan-2-one); trans-4-decenal ((E)-dec-4-enal); dihydromyrcenol (2,6-dimethyloct-7-en-2-ol); diphenyl ether (diphenyl ether); dihydroanisole (1-methoxy-4-propylbenzene); dihydrojasmone (3-methyl-2-pentylcyclopentanone); dimethyl anthranol (2-(methylamino)benzoate); dimethyl benzyl acetate (2-methyl-1-phenylprop-2-yl acetate); dimethyl benzyl butyrate (2-methyl-1-phenylprop-2-yl butyrate); dimethyl heptanol (2,6-dimethylheptanol); butyl dodecyl lactone (6-heptyltetrahydro-2H-pyran-2-one); propyl dodecyl lactone ( 5-Octooxacyclopentan-2-one); dodecenoal ((E)-dodeceno-2-one); ebony alcohol ((E)-3-methyl-5-(2,2,3-trimethylcyclopent-3-en-1-yl)pent-4-en-2-ol); ethyl hexanoate (ethyl hexanoate); ethyl methyl-2-butanoate (ethyl 2-methylbutanoate); ethyl maltol (2-ethyl-3-hydroxy-4H-pyran-4-one); ethyl heptanoate (ethyl heptanoate); ethyl vanillin (3-ethoxy-4-hydroxybenzaldehyde); ethylene brassinolate (1,4-dioxane-5,17-dione); eucalyptol ((1s,4s)-1,3,3-trimethyl-2-oxabicyclo[2.2]).2] Octane); Eugenol (4-allyl-2-methoxyphenol); Synthetic oakmoss (methyl 2,4-dihydroxy-3,6-dimethylbenzoate); FIXAMBRENE (3a,6,6,9a-tetramethyldodecano[2,1-b]furan); Anthocyanin (3-(3-isopropylphenyl)butanal); FLORIDILE ((E)-undec-9-enonitrile); Grupone (1-(5,5-dimethylcyclohexyl-1-en-1-yl)pent-4-en-1-one); Styrax acetate (1-phenylethyl acetate); Geraniol ((E)-3,7-dimethyloct-2,6-dien-1-ol); Geraniol acetate ((E)-3,7-dimethyloct-2,6-dien-1-yl acetate); Cyclopentadene lactone ((E)-oxetane-12-en-2-one); Methyl dihydrojasmonic acid (methyl 3-oxo-2-pentylcyclopentane acetate); trans-2-hexenal ((E)-hex-2-enal); cis-3-hexenol ((Z)-hex-3-en-1-ol); cis-3-hexenyl acetate ((Z)-hex-3-en-1-yl acetate); cis-3-hexenyl salicylate (2-hydroxy (Z)-hex-3-en-1-yl benzoic acid; hexyl acetate; indoleene (8,8-di(1H-indol-3-yl)-2,6-dimethyloct-2-ol); ethyl ionone ((E)-4-(2,6,6-trimethylcyclohex-1-en-1-yl)but-3-en-2-one); angelone ((E)-3-methyl-4-(2,6,6-trimethyl) Cyclohex-2-en-1-yl)but-3-en-2-one); methyl ionone ((E)-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); isoamyl acetate (3-methyl butyl acetate); isoamyl butyrate (3-methyl butyl butyrate); isoeugenol ((E)-2-methoxy-4-(prop-1-en-1-yl)phenol); isojasmine B11 (2-hexylcyclopent-2-en-1-one); isomethyl ionone ((E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); jasmine ester (3-butyl-5-methyltetrahydro-2H-pyran-4-yl ester); LAITONE (8-isopropyl-1-oxaspiro[4].5] Dec-2-one); Citrile ((2E,6Z)-3,7-dimethylnon-2,6-dienonitrile); Linalool (3,7-dimethyloct-1,6-dien-3-ol); Linalool oxide (2-(5-methyl-5-vinyltetrahydrofuran-2-yl)prop-2-ol); Linalyl acetate (3,7-dimethyloct-1,6-dien-3-yl acetate); Matricariacetin (ethyl 2-methylvalerate); Lily of the valley alcohol ((4-isopropylcyclohexyl)methanol); Roshol (3-methyl-5-phenylpentan-1-ol); Cucurbitaldehyde (2,6-dimethylhept-5-enal); Mercapto-8-menthane-3- Ketone (mercapto-p-menthane-3-one); methyl anthranilate (methyl 2-aminobenzoate); methyl benzoate (methyl benzoate); methyl tantalize (2-ethoxy-4-(methoxymethyl)phenol); methyl heptenone (6-methylhept-5-en-2-one); methyl lactone (8-methyl-1-oxaspiro[4.5]dec-2-one); methyl octynecarboxylate (methyl non-2-ynyl acetoate); methyl salicylate (methyl 2-hydroxybenzoate); fentanyl ketone (2-(2-(4-methylcyclohexyl-3-en-1-yl)propyl)cyclopentanone); methyl non-2-enoate ((E)-non-2-enoate); NEROLEX ((2Z)-3,7-dimethyloct-2,6-dien-1-ol); Nerolidol ((Z)-3,7,11-trimethyldodec-1,6,10-trien-3-ol); Naphthalene ether crystals (2-ethoxynaphthalene); Neonerol (1-(3-methylbenzofuran-2-yl)acetone); Nerolidinyl acetate ((Z)-3,7-dimethyloct-2,6-dien-1-yl acetate); Nonadienal ((2E,6Z)-non-2,6-dienal); cis-6-nonenal ((Z)-non-6-enal); cis-6-nonenol ((Z)-non-6-en-1-ol); NYMPHEAL (3-(4-(2-methylpropyl)-2-methylphenyl)propanal); octyl lactone (6-propyltetrahydro-2H-pyran-2-one); sweet orange crystal (1-(2-naphthyl)-ethyl ketone); p-tert-butylcyclohexyl acetate (4-(tert-butyl)cyclohexyl acetate); peach aldehyde (5-heptyldihydrofuran-2(3H)-one); tetrahydrogeraniol (3,7-dimethyloctyl-1-ol); phenylethyl acetate (2-phenylethyl acetate); methyl-pinene (2,6,6-trimethylbicyclo[3.1.1]hept-2-ene); ethyl-pinene (6,6-dimethyl-2-methylenebicyclo[3.1.1]hept-2-ene).1] Heptane); POMAROSE ((2E,5E)-5,6,7-trimethyloct-2,5-dien-4-one); POMELOL FF (2,4,7-trimethyl-6-octen-1-ol); isopentenyl acetate (3-methylbut-2-en-1-yl acetate); coconut aldehyde (5-pentyldihydrofuran-2(3H)-one); raspberry ketone (4-(4-hydroxyphenyl)but-2-one); 9-decenol (dec-9-en-1-ol); rose ether CO (4-methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H-pyran); aromatic rose ether (4-methyl-2-phenyl-3,6-dihydro-2H-pyran); saffron aldehyde (2,6,6-trimethylcyclohexane-1,3-diencarboxaldehyde); SCENTAURUS JUICY (4-(dodecylthio)-4-methylpentan-2-one); silver aldehyde (2-methyl-3-[4-(2-methylpropyl)phenyl]propanal); styrax acetate (1-phenylethyl acetate); yucca musk (e)-2-((3,5-dimethylhex-3-en-2-yl)oxy)-2-methylpropyl ester); terpinene (1-methyl-4-prop-2-ylcyclohex-1,4-diene); terpineol (2-(4-methylcyclohex-3-en-1-yl)prop-2-ol); terpinene (1-methyl -4-(prop-2-ethylene)cyclohexyl-1-ene); tetrahydrolinalool (3,7-dimethyloctyl-3-ol); cyclopropyl anisole (1-(cyclopropylmethyl)-4-methoxybenzene); tridecenoen-2-onitrile ((E)-tridecenoen-2-ene acrylonitrile); neoprivet aldehyde (3-phenylbutanal); neojasmine aldehyde (3-(benzo[d][1,3]dioxanepentadien-5-yl)-2-methylpropanal); methyldecenol ((E)-4-methyldec-3-en-5-ol); ethylnaphthalene methyl ether (2-methoxynaphthalene); BOIS Cedarwood oil; Eucalyptus globulus oil; Galbanum oil; Giordano oil; Clove oil; Lavandina oil; Mandarin oil; Orange terpenes; Patchouli oil; and Ylang oil.

[0174] The aforementioned ingredients have all been identified as not only biodegradable but also suitable for encapsulation in terms of their physical and chemical properties, such as lipophilicity, molecular size, and reactivity with shell materials. Therefore, they provide a useful selection of fragrance ingredients for easily and reliably delivering more sustainable fragrance encapsulations.

[0175] In one embodiment, the at least one flavoring ingredient may comprise at least one flavoring precursor, i.e., a material capable of releasing the flavoring ingredient by stimulation such as a change in temperature, the presence of an oxidant, the action of an enzyme, or the action of light. Such flavoring precursors are well known in the art.

[0176] In one embodiment, the at least one flavoring ingredient is completely encapsulated in a core-shell microcapsule, the core-shell microcapsule comprising a core and a shell surrounding the core.

[0177] In one embodiment, the at least one fragrance ingredient is partially encapsulated in a core-shell microcapsule, the core-shell microcapsule comprising a core and a shell surrounding the core. Fragrance ingredients not encapsulated in a core-shell microcapsule are referred to as unencapsulated fragrance ingredients.

[0178] If present, the unencapsulated fragrance component may be the same as or different from the encapsulated fragrance component used in the microcapsule compositions described above. This results in modulated release of the same or different odor impressions, depending on whether the encapsulant is exposed to moisture or mechanical stress. In particular, the sequential release of the fragrance components is conceivable.

[0179] The compositions of this invention allow for the release of fragrance components through mechanical action or activation by moisture. However, such compositions are also particularly useful when used as a fragrance delivery method in consumer products. For optimal delivery of the beneficial effects of the fragrance, the consumer product requires the core-shell microcapsules to adhere to the substrate to which they are applied, such as a laundry detergent.

[0180] The unencapsulated flavoring ingredient may contain at least one, preferably at least two, more preferably at least four, even more preferably at least eight, and even more preferably at least sixteen biodegradable ingredients, preferably composed of them. The biodegradable ingredients may be present at a total concentration of at least 75% by weight, preferably at least 80% by weight, more preferably at least 85% by weight, even more preferably at least 90% by weight, and even more preferably at least 95% by weight, relative to the total weight of the unencapsulated flavoring ingredient. The biodegradable ingredients may be selected from the group defined above.

[0181] Core-shell microcapsule compositions are typically provided in slurry form, i.e., a dispersion or suspension of microcapsules in an aqueous medium, which may contain about 60% by weight of water. If desired, the slurry can be dried to provide a microcapsule composition in powder or cake form, which typically contains about 5% by weight of water.

[0182] In the dried form of the microcapsule composition, the proportion of the flavoring component relative to the total weight of the dried form of the microcapsule composition can be from about 10 to about 50% by weight, preferably from about 20 to about 47.5% by weight, or even more preferably from about 30 to about 45% by weight.

[0183] The proportion of core-shell microcapsules in a unit dose of laundry detergent composition as described above, based on dry weight, relative to the weight of a unit dose of laundry detergent composition, can be from about 1.0 wt% to about 10.0 wt%, optionally from 2.0 wt% to about 3.0 wt%, preferably from about 2.3 wt% to about 2.8 wt%, more preferably from about 2.5 wt%.

[0184] In one embodiment, the shell of the microcapsule comprises a melamine-formaldehyde polymer, a polyurea or polyurethane polymer, or a hydrated polymer and a polymer stabilizer formed by the reaction of an aminosilane with a polyfunctional isocyanate, preferably wherein the shell of the microcapsule is a hydrated polymer and a polymer stabilizer formed by the reaction of an aminosilane with a polyfunctional isocyanate.

[0185] Other additives

[0186] In addition to the surfactant, at least one film-forming agent, thickener, at least one plasticizer, and microencapsulation composition as defined above, the unit dose laundry detergent composition may also contain other additives that further improve the performance and / or aesthetic properties of the composition. Such additives may function as chelating agents, preservatives, membrane-release aids, inorganic and / or organic detergent builders, detergent additives, dyes, color-capturing compounds, color transfer inhibitors, fluorescent whitening agents, disinfectants, defoamers, pH adjusters, disintegrants, leavening agents, or enzymes.

[0187] Suitable chelating agents can be iron and / or manganese chelating agents selected from zeolites, aminocarboxylates, aminophosphonates, polyfunctional substituted aromatic chelating agents, and mixtures thereof. In one embodiment, the chelating agent is ethylenediaminetetraacetic acid (EDTA). EDTA is used to dissolve mineral scale and acts as a chelating agent to reduce water hardness, thereby improving the effectiveness of detergents. It is able to bind and reduce reactive metal ions such as Ca. 2+ and Fe 3+ After being bound by EDTA, the metal ions remain in solution but exhibit reduced reactivity.

[0188] Based on dry weight, the chelating agent may be present at a maximum of 0.5% by weight, optionally about 0.2% by weight, of the composition.

[0189] Preservatives inhibit the growth of microorganisms and fungi. Suitable preservatives can be parabens, such as methylparaben and propylparaben, and isothiazolinones, such as methylisothiazolinone, chloromethylisothiazolinone, and mixtures thereof. A preferred preservative is methylisothiazolinone.

[0190] Based on dry weight, the preservative may be present at a maximum of 0.1% by weight, and optionally about 0.05% by weight, of the composition.

[0191] Membrane release aids facilitate the release of the sheet from a support on which the substrate has been placed for drying. A suitable example of a membrane release aid is mineral oil, such as mineral oil Carnation.

[0192] Based on dry weight, the membrane release aid may be present at a maximum of 1.5% by weight, and optionally about 1.1% by weight, of the composition.

[0193] Examples of inorganic and / or organic detergent builders include carbonates, such as sodium carbonate, sodium bicarbonate and mixtures thereof; aluminosilicate builders, such as zeolites, especially zeolite A, zeolite X, zeolite P and zeolite MAP; bentonite; silicates, preferably sodium silicate.

[0194] Examples of dyes include orange dyes, blue dyes, green dyes, purple dyes, pink dyes, or mixtures thereof. Preferably, the dye is water-soluble to avoid staining the fabric.

[0195] Examples of suitable disintegrants include cellulose-based materials, starch derivatives, clays, or synthetic polymers such as cross-linked polyvinylpyrrolidone, polyacrylates, or mixtures thereof.

[0196] In one embodiment, the unit dose laundry detergent composition comprises the following components based on dry weight:

[0197] 19.7% by weight of sodium C14-16 olefin sulfonate;

[0198] 5.0% by weight of coconut oil glucoside;

[0199] 1.8% by weight cocamidopropyl betaine;

[0200] 18.9% by weight PVOH;

[0201] 38.3% by weight corn starch;

[0202] 12.7% glycerin by weight;

[0203] 1.0% by weight mineral oil;

[0204] <0.1% by weight of methylisothiazolinone;

[0205] 0.2% by weight EDTA;

[0206] 2.5% by weight of dried core-shell microcapsules.

[0207] water

[0208] In one embodiment, the water content in the composition is from about 6% to about 9% by weight, preferably from about 7% to about 8% by weight. This water content provides the advantage that the composition exhibits the desired flexibility for ease of preparation and processing, and is subsequently maintained during storage.

[0209] In one embodiment, when the water content in the composition is about 6% to about 9% by weight, preferably about 7% to about 8% by weight of the total composition, the unit dose of the laundry detergent composition may be in the form of laundry sheets or laundry granules.

[0210] In one embodiment, the water content in the composition is about 7.5% by weight.

[0211] method

[0212] In one aspect, the present invention provides a method for preparing a unit dose laundry detergent composition. The laundry detergent composition of the present invention can be prepared by a method comprising the following steps:

[0213] i) A mixture of at least one film-forming agent, optionally as an aqueous solution; at least one plasticizer, optionally as an aqueous solution; and a surfactant, optionally as an aqueous solution;

[0214] ii) While continuously stirring, add a thickener in small increments to the solution obtained in step i);

[0215] iii) Optionally, other additives are added to the mixture obtained in step ii), optionally as an aqueous solution;

[0216] iv) Add a microcapsule composition comprising a polymer encapsulating at least a fragrance component to the mixture obtained in step iii), wherein the at least a fragrance component is encapsulated in a core-shell microcapsule comprising a core and a shell surrounding the core;

[0217] v) Optionally, the mixture obtained in step iv) is dried, wherein the drying step is carried out at a temperature of about 25°C to about 150°C.

[0218] The at least one film-forming agent, at least one plasticizer, surfactant, thickener, other additives, and microcapsule composition are as described above.

[0219] Once the surfactant (typically provided as an aqueous solution), the water-soluble base (also in aqueous solution), and the microcapsule composition (in slurry form) described above are mixed together in appropriate proportions, the resulting homogeneous liquid can be poured onto a drying plate or drying container. Water is allowed to evaporate from the liquid over a specific period of time, such as 4 to 12 hours, optionally about 8 hours, for example at a temperature of about 25°C. When the water content reaches a level below about 9% by weight, the resulting product is a non-brittle, flexible solid in the form of flakes or granules. In one embodiment, the water content is about 7.5% by weight.

[0220] Optionally, the composition may then be further dried, for example at a temperature of up to about 150°C.

[0221] use

[0222] In one aspect, the use of the composition described above for improving the perception of a laundry detergent or enhancing the performance of the laundry detergent is provided.

[0223] The invention is further illustrated by the following non-limiting embodiments:

[0224] Example 1: Preparation of a unit dose laundry detergent composition matrix

[0225] In a beaker, using a top-mounted four-pronged mixing paddle to stir, add the following ingredients in the following order:

[0226] 1) PVOH as a 21.3% solution (from Sekisui's Selvol 21-205);

[0227] 2) Glycerin 99.5% (from Givaudan);

[0228] 3) Sodium C14-16 olefin sulfonate as a 40% solution (from Stepan's Bio Terge AS-40);

[0229] 4) Cocoyl glucoside as a 51% solution (Plantaren 818 UP from BASF);

[0230] 5) Cocamidopropyl betaine as a 30% solution (Lexaine CMB from Inolex);

[0231] 6) Corn starch (100%, Purity 21C Pure from Nouryon) is added as a solid in small increments while stirring until the mixture is completely homogeneous. The sign of complete homogenization is a smooth, opaque product.

[0232] 7) Mineral oil (100%, mineral oil Carnation from Givaudan);

[0233] 8) Methylisothiazolinone as a 9.7% solution (Neolone M-10 from Dow);

[0234] 9) EDTA as a 39% solution (from Dow's Versene 100).

[0235] Avoid high-shear mixing as it may form bubbles.

[0236] The composition matrix was prepared by varying the relative amounts of the water-soluble base (i.e., film-forming agent, thickener, and plasticizer), as shown in Table 1:

[0237] Table 1: Laundry detergent composition matrix before drying

[0238]

[0239] contrast

[0240] To evaluate the hardness of the laundry sheets obtained after evaporation of water from these compositions, 12% by weight (based on dry weight) of unencapsulated fragrance oil was added to all compositions. The resulting mixture was poured onto Teflon drying sheets and spread evenly with a spatula to form a rectangular layer. Water was allowed to evaporate from the compositions at approximately 25°C for about 8 hours. The texture of the resulting material was then evaluated.

[0241] Relatively high glycerin content, such as in compositions 1.1 and 1.2, results in sticky / tacky laundry sheets without stiffness.

[0242] Composition 1.6, containing relatively low levels of glycerol and relatively high amounts of corn starch, produced hard, spongy sheets without flexibility.

[0243] Only compositions 1.3 and 1.4 produced soft, dry, and firm laundry detergent sheets. Subsequent experiments were conducted using composition 1.3 as the matrix for unit doses of the laundry detergent composition.

[0244] The pH of matrix composition 1.3 was measured to be 7.79. The viscosity was measured at room temperature using a Brookfield Ametek DV2T DV2TRVMJO instrument at 10.290 cps RVT #4, 20 rpm.

[0245] Example 2: Preparation of unit dose laundry detergent composition

[0246] Under stirring, 3 g of the microcapsule slurry prepared according to Table 2 was added to 100 g of the laundry detergent composition matrix prepared in Example 1.3. High-shear mixing was avoided due to the possibility of bubble formation. The following microcapsules were used as described in Table 2.

[0247] Table 2: Microcapsules and preparation methods

[0248]

[0249] A . wash Clothing Piece

[0250] Pour 30 g of the obtained mixture onto a Teflon drying sheet and spread it evenly with a spatula to form a rectangular layer. Evaporate water from the composition at approximately 25°C for approximately 8 hours to obtain approximately 13.5 g of dried composition. Gently peel the dried sheet from the Teflon sheet. Divide the sheet into four identical pieces, each weighing approximately 3 g / piece, with a thickness of approximately 0.65 mm, a length of approximately 10 cm, and a width of approximately 9 cm.

[0251] B . wash Coating particles

[0252] The resulting mixture was deposited as droplets onto a Teflon drying sheet. Water was allowed to evaporate from the droplets at approximately 25°C for about 8 hours, producing dried granules. The dried granules were then gently peeled off the Teflon sheet. Each dried granule weighed approximately 0.1 grams.

[0253] Example 3: Olfactory Evaluation

[0254] The obtained unit dose laundry detergent composition was tested in laundry applications as follows.

[0255] I. Place a 3 g flake (as prepared in Example 2A) or 2.6 g granules (as prepared in Example 2B) into a washing machine under running water and allow it to disperse for about 1-2 minutes, then place the towel into the drum. The washing process is carried out under the following conditions:

[0256] - Medium load of 20 small towels

[0257] Wash with warm water

[0258] - Rinse with cold water

[0259] - 45-minute drum dryer

[0260] The following is an olfactory evaluation:

[0261] - Each group member evaluates one towel; n = number of group members.

[0262] - Evaluate the towel using the strength scale shown below.

[0263] - Evaluate each towel before rubbing, then rub it 3 times, and evaluate it after rubbing.

[0264] - Take measurements immediately after washing and drying.

[0265] II. Monitoring over time and temperature:

[0266] - A sample of a unit dose laundry detergent composition containing microcapsules was stored at 40°C for 2 weeks;

[0267] - After using the stored unit dose of laundry detergent composition, obtain machine-dried towels according to step I.

[0268] - Evaluate as described in step I.

[0269] Intensity scale: 0 - no odor; 1 - very weak; 2 - weak; 3 - weak; 4 - relatively mild; 5 - medium; 6 - relatively strong; 7 - strong; 8 - strong; 9 - very strong; 10 - extremely strong.

[0270] The results of these evaluations are shown in Table 3.

[0271] Table 3: Values ​​of towels before and after friction recorded after washing with the unit dose laundry detergent composition according to the present invention.

[0272]

[0273] All samples exhibited very good performance, especially after friction. Samples 2.3 and 2.4 performed particularly well in both the sheet and granule forms. Overall, sample 2.4 performed best, showing excellent after friction performance in both sheet and granule forms after storage at 40°C for 2 weeks.

[0274] Example 4: Effect of drying conditions on the performance of a unit dose of laundry detergent composition

[0275] The tablets using microcapsules 2.4 prepared in Example 2A were further dried at approximately 25°C for a total of approximately 24 hours. For comparison, the tablets using microcapsules 2.4 prepared in Example 2A were dried at 150°C for 10 minutes. Table 4 shows the olfactory properties of the resulting compositions.

[0276] Table 4: Recording values ​​before and after rubbing for towels washed with a unit dose of the laundry detergent composition according to the present invention after further drying (n=12)

[0277]

[0278] It can be observed that drying the sheet at high temperature leads to improved product properties, thereby providing excellent post-friction properties.

Claims

1. A unit dose laundry detergent composition comprising: a) Surfactants; b) A water-soluble base comprising: - At least one film-forming agent; - Thickener; - At least one plasticizer; Wherein, based on dry weight, the weight ratio between the at least one film-forming agent and thickener and the at least one plasticizer is from about 3.5:1 to about 5.5:1, preferably about 4.5:1; and c) A microcapsule composition comprising a polymer encapsulating at least a fragrance component, wherein the at least a fragrance component is encapsulated in a core-shell microcapsule comprising a core and a shell surrounding the core.

2. The composition according to claim 1 or claim 2, wherein the weight ratio between the thickener and the at least one film-forming agent is from about 2.5:1 to about 1.5:1, preferably about 2.0:1, based on dry weight.

3. The composition according to claim 1 or claim 2, wherein the surfactant is selected from anionic surfactants, nonionic surfactants, amphoteric surfactants, or combinations thereof.

4. The composition according to any one of the preceding claims, wherein the at least one film-forming agent is selected from polyalkylene glycols, polyvinyl alcohol, polyacrylates, polymethacrylates, polyacrylamide, polyvinylpyrrolidone, and proteins / peptides or their hydrolysates, preferably wherein the at least one film-forming agent is polyvinyl alcohol.

5. The composition according to any one of the preceding claims, wherein the thickener is selected from starch, modified starch, cellulose, or a combination thereof, preferably wherein the thickener is starch.

6. The composition according to any one of the preceding claims, wherein the at least one plasticizer is selected from pentaerythritols, sorbitols, mannitols, and diols, preferably wherein the plasticizer is glycerol.

7. The composition according to any one of the preceding claims, wherein the shell of the microcapsule comprises a melamine-formaldehyde polymer, a urea-formaldehyde polymer, a polyurea or polyurethane polymer, a polyamide, a polyacrylate, a polycarbonate, a polymer stabilizer formed by a combination of a polymer surfactant and at least one aminosilane, a composite cohesive layer formed by crosslinking at least one protein with a first crosslinking agent and at least one polysaccharide, or a hydrated polymer and a polymer stabilizer formed by the reaction of an aminosilane with a polyfunctional isocyanate, preferably wherein the shell of the microcapsule is a hydrated polymer and a polymer stabilizer formed by the reaction of an aminosilane with a polyfunctional isocyanate.

8. The composition according to any one of the preceding claims, wherein the surfactant is present, based on dry weight, in about 24% to about 29% by weight, preferably about 25% to about 28.5% by weight, particularly about 25.5%, 26.0%, 26.5%, 27.0%, 27.5%, 28.0 or 28.5% by weight, preferably about 26.5% by weight.

9. The composition according to any one of the preceding claims, wherein the film-forming agent is present, based on dry weight, at about 16% to about 23% by weight of the composition, preferably about 18% to about 22% by weight, for example about 18.5%, 19.0%, 19.5%, 20.0%, 20.5%, 21.0%, 21.5% by weight, and most preferably about 19.0% by weight.

10. The composition according to any one of the preceding claims, wherein the thickener is present, based on dry weight, at about 35% to about 42% by weight of the composition, preferably about 37% to about 40% by weight, for example about 37.5%, 38.0%, 38.5%, 39.0%, 39.5% by weight, and most preferably about 38.5% by weight.

11. The composition according to any one of the preceding claims, wherein the plasticizer is present, based on dry weight, at about 8.0% by weight to about 15.0% by weight, preferably about 10.0% by weight to about 13.0% by weight, for example about 10.5%, 11.0%, 11.5%, 12.0%, 12.5% ​​by weight, preferably about 12.5% ​​by weight.

12. The composition according to any one of the preceding claims, wherein the core-shell microcapsules are present, based on dry weight, in an amount of about 1.0% to about 10.0% by weight, optionally 2.0% to about 3.0% by weight, preferably about 2.3% to about 2.8% by weight, and more preferably about 2.5% by weight of the composition.

13. The composition according to any one of the preceding claims, wherein the composition further comprises at least one unencapsulated fragrance component, optionally wherein, based on dry weight, the unencapsulated fragrance component is present in an amount of about 0.5% by weight to about 12% by weight, optionally 5% by weight to about 7% by weight, preferably about 6% by weight of the composition.

14. The composition according to any one of the preceding claims, wherein the composition further comprises one or more additives selected from chelating agents, preservatives, membrane release aids, inorganic and / or organic detergent builders, detergent additives, dyes, color-capturing compounds, color transfer inhibitors, fluorescent whitening agents, disinfectants, defoamers, pH adjusters, or leavening agents.

15. The composition according to any one of the preceding claims, wherein the composition comprises water in a weight percentage of about 6% to about 9% by weight, preferably about 7% to about 8% by weight, for example about 7.5% by weight.

16. The composition of claim 15, wherein the composition is provided in the form of laundry sheets or laundry granules.

17. A method for preparing the composition according to any one of claims 1 to 16, the method comprising the steps of: i) A mixture of at least one film-forming agent, optionally as an aqueous solution; at least one plasticizer, optionally as an aqueous solution; and a surfactant, optionally as an aqueous solution; ii) While continuously stirring, add a thickener in small increments to the solution obtained in step i); iii) Optionally, other additives are added to the mixture obtained in step ii), optionally as an aqueous solution; iv) Add a microcapsule composition comprising a polymer encapsulating at least a fragrance component to the mixture obtained in step iii), wherein the at least a fragrance component is encapsulated in a core-shell microcapsule comprising a core and a shell surrounding the core; v) Optionally, the mixture obtained in step iv) is dried, wherein the drying step is carried out in a temperature range of about 25°C to about 150°C.

18. Use of the composition according to any one of claims 1 to 16 for improving the perception of a laundry detergent or enhancing the performance of the laundry detergent.

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