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 former; − a thickening agent; − at least one plasticizer; wherein the weight ratio between the at least one film former and thickening agent to the at least one plasticizer is between about 3.5:1 to about 5.5:1, preferably about 4.5:1, on dry basis; and c) a microcapsule composition comprising a polymer encapsulating at least a fragrance ingredient, wherein the at least fragrance ingredient is encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core. The invention also provides a method of making, as well as the use of such a composition.

Description

[0001] Laundry Composition

[0002] The present invention relates to water-soluble unit dose laundry detergent compositions comprising a microcapsule composition comprising a polymer encapsulating at least a fragrance ingredient, methods of making such compositions and the use thereof to improve the perception or enhance the performance of the laundry detergent.

[0003] BACKGROUND OF THE INVENTION

[0004] Water-soluble unit dose laundry detergents show a cleaning performance similar to the traditional laundry detergents and have the advantage that they are more sustainable and easier to use. Water-soluble unit dose laundry detergents are commercially available for example in the form of laundry sheets of certain length, width and thickness depending on the concentration of the surfactant. When in use, the sheets release the constituents upon addition of water. In addition to surfactant, some laundry sheets contain fragrance ingredients, which are also released when the sheet comes into contact with water.

[0005] For ease of handling, customers expect sheets that are solid, non-tacky and not brittle. It is desirable that the laundry detergent sheets are not only strong enough to withstand substantive mechanical forces without losing their structural integrity, but also sufficiently flexible for ease of packaging and storage. At the same time, consumers expect the sheets to provide an appealing scent profile on the fabrics at all stages of the washing and drying process.

[0006] It is a major challenge to develop fabric care products which provide an optimum of exposure to effective levels of fragrance ingredients over a long period of time. Several studies have shown that the consumer products are perceived as being more effective if the fragrance ingredients are available at an individually tailored level at a particular time at the target site. This challenge can be addressed by utilizing encapsulated fragrance ingredients.

[0007] Fragrance ingredients are encapsulated for a variety of reasons. Microcapsules can isolate and protect such materials from external suspending media, such as consumer product bases, in which they may be incompatible or unstable. They are also used to assist in the deposition of the fragrance ingredients onto substrates such as fabrics. They can also act as a means of controlling the spatio-temporal release of fragrance ingredients.

[0008] Generally, the encapsulated fragrance contributes to enhancing fragrance perception upon mechanical activation, such as at the moment the laundry is removed from the washing machine. Additionally, the encapsulated fragrance may be released during fabric handling, typically under the action of mechanical forces. Core-shell microcapsules may be used, wherein the core comprises the encapsulated fragrance and is surrounded by an impervious, frangible shell.

[0009] US 2018 / 223225 A1 , for example, concerns water-soluble detergent sheets of certain dimensions, comprising encapsulated fragrance ingredients. The “substrate” is based on a water soluble filmgenerating component. However, no example of a detergent composition is provided and the issues of the sheet’s aspect, in terms of texture, flexibility and tackiness in the presence of the encapsulated fragrance is not addressed. In addition to the ease of handling of a particular consumer product, an appealing olfactory profile when employed in washing fabrics as well as the stability of the consumer product over time is important to the customer. Therefore, there is still a need to develop unit dose laundry detergent composition comprising encapsulated fragrance.

[0010] The present invention provides a unit dose detergent composition which satisfies the above- mentioned requirements. Once sufficient water has been removed, the composition is essentially a non-tacky and flexible solid, being strong enough to withstand substantive mechanical forces without losing its structural integrity. At the same time, the composition provides outstanding olfactive performance, both at the wet and dry stages of the washing process. The performance of the composition is maintained upon storage over a period of time.

[0011] SUMMARY OF THE INVENTION

[0012] In a first aspect, the present invention relates to a unit dose laundry detergent composition comprising: a) a surfactant; b) a water-soluble substrate comprising:

[0013] - at least one film former;

[0014] - a thickening agent;

[0015] - at least one plasticizer; wherein the weight ratio between the at least one film former and thickening agent to the at least one plasticizer is between about 3.5:1 to about 5.5:1 , preferably about 4.5:1 , on dry basis; and c) a microcapsule composition comprising a polymer encapsulating at least one fragrance ingredient, wherein at least one fragrance ingredient is encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core. In a further aspect, the invention provides a method of preparing the composition as described herein.

[0016] The use of the composition as described herein to improve the perception or enhance the performance of the at least one fragrance ingredient in the consumer product is provided in a further aspect.

[0017] DEFINITIONS

[0018] As used herein, the term “water-soluble” refers to a solubility of more than about 30 grams per liter (g / L) of deionized water measured at 20° C and under the atmospheric pressure. The term “substantially water-soluble” refers to a solubility of more than about 25 grams per liter (g / L) of deionized water measured at 20° C and under the atmospheric pressure.

[0019] The term “solid” indicates that the material is in a solid state of aggregation at a temperature below about 40 °C.

[0020] As used herein, the term “sheet” refers to a three-dimensional shape having a thickness, a length, and a width, wherein the length-to-thickness aspect ratio and the width-to-thickness aspect ratio are both at least about 5:1.

[0021] The term “pellet” refers to a totally or partially rounded three-dimensional shape such as ellipsoidal, spherical, or cylindrical body.

[0022] Performance of microcapsules is measured by the intensity of the fragrance release during the use experience, such as the pre-rub and post-rub phases in a laundry experience. The pre-rub phase is the phase when the microcapsules have been deposited on the fabric, e.g., after a fabric consumer product containing microcapsules has been used during the wash cycle. The post-rub phase is after the microcapsules have been deposited and the microcapsules are broken by friction or other similar mechanisms.

[0023] In the context of the present invention, all percentages refer to weight percentages (wt %), unless otherwise indicated. Numerical ranges which are indicated in the format “from x to y” also include the stated values. If several preferred numerical ranges are indicated in this format, it is readily understood that all ranges which result from the combination of the various endpoints are also included. In the context of the present invention, the term “on dry basis” refers to the weight of the compound wherein the presence of water is neglected for the purposes of the calculation.

[0024] DETAILED DESCRIPTION

[0025] Any aspect of the invention may be combined with any other aspect of the invention unless the context demands otherwise. Any of the preferred or optional features of any aspect may be combined, singly or in combination, with any aspect of the invention, as well as with any other preferred or optional features, unless the context demands otherwise.

[0026] The applicant has surprisingly and unexpectedly found that a unit dose laundry detergent composition comprising: a) a surfactant; b) a water-soluble substrate comprising:

[0027] - at least one film former;

[0028] - a thickening agent;

[0029] - at least one plasticizer; wherein the weight ratio between the at least one film former and thickening agent to the at least one plasticizer is between about 3.5:1 to about 5.5:1 , preferably about 4.5:1 , on dry basis; and c) a microcapsule composition comprising a polymer encapsulating at least one fragrance ingredient, wherein at least one fragrance ingredient is encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core satisfies the desired criteria for commercial unit dose laundry detergents. Once it reaches a suitably low water level, the composition is essentially solid, non-tacky and strong enough to withstand substantive mechanical forces without losing its structural integrity, but also sufficiently flexible for ease of packaging and storage. The composition provides outstanding olfactive performance, both at the wet and dry stages of the washing process. The performance of the composition is maintained over time.

[0030] The invention, therefore, provides a unit dose laundry detergent composition comprising: a) a surfactant; b) a water-soluble substrate comprising:

[0031] - at least one film former; a thickening agent; at least one plasticizer; wherein the weight ratio between the at least one film former and thickening agent to the at least one plasticizer is between about 3.5:1 to about 5.5:1 , preferably about 4.5:1 , on dry basis; and c) a microcapsule composition comprising a polymer encapsulating at least one fragrance ingredient, wherein at least one fragrance ingredient is encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core.

[0032] Surfactant

[0033] In order to fulfil the detergent function, the composition comprises at least one surfactant. A surfactant is a surface-active ingredient which is able to remove dirt particles from the textiles during a washing process using the relevant washing agent, such as water, due to micelles being formed. Suitable surfactants include cationic, anionic, non-ionic and amphoteric / zwitterionic surfactants. Any mixtures of two or more surfactants can also be used, depending on the desired wash performance.

[0034] In one embodiment, the surfactant is selected from the group consisting of an anionic surfactant, a non-ionic surfactant, a zwitterionic surfactant, or a combination thereof. Preferably, the surfactant is a mixture of an anionic surfactant, a non-ionic surfactant and a zwitterionic surfactant.

[0035] Suitable anionic surfactants include, but are not limited to, alkylbenzene sulfonates, olefin sulfonates, alkane sulfonates, fatty alcohol sulfates, fatty alcohol ether sulfates, or a mixture of two or more of these anionic surfactants. The anionic surfactants can be present in the form of the sodium, potassium, magnesium or ammonium salts thereof. The anionic surfactants are preferably present in the form of the sodium salts thereof.

[0036] 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 tradename Bio Terge AS-40 (from Stepan).

[0037] Suitable non-ionic 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 polyglycol ethers, amine oxides, alkyl (poly)glucosides and mixtures thereof. The non-ionic surfactants are preferably alkyl (poly)glucosides, such as coco-glucoside. In one embodiment, the coco-glucoside is sold under the tradename Plantaren 818 UP (from BASF).

[0038] Suitable amphoteric / zwitterionic surfactants include amine oxides and betaines. The zwitterionic surfactant is preferably cocamidopropyl betaine. In one embodiment, the cocamidopropyl betaine is sold under the tradename Lexaine CMB (from Index).

[0039] In order to obtain a particularly good wash performance with a high dirt loosening power, the surfactant is present from about 24 wt% to about 29 wt%, preferably from about 25 wt% to about 28.5 wt%, in particular about 25.5, 26.0, 26.5, 27.0, 27.5, 28.0 or 28.5 wt%, preferably about 26.5 wt% of the composition, on dry basis.

[0040] In one embodiment, the ratio anionic surfactant : non-ionic surfactant : amphoteric / zwitterionic surfactant is about 11.5 : 3.0 : 1 , such as 11.2 : 2.8: 1 .

[0041] Water-Soluble Substrate

[0042] The unit dose laundry detergent composition contains a water-soluble substrate which provides the necessary properties for easy handling. The substrate is a material that is solid and flexible when dry but dissolves completely in water. The substrate is generally produced by mixing the ingredients as an aqueous solution. When the aqueous solution of substrate is combined in suitable proportions with the remaining required constituents, the resulting liquid may be poured onto a drying plate or into a drying container. After removal of excess water, the resulting composition is in the form of solid sheets or pellets that remain flexible. These sheets or pellets can then be placed into a laundry machine, and will release the constituents on addition of water, leaving no residue behind.

[0043] The water-soluble substrate comprises at least one film former, a thickening agent and at least one plasticizer.

[0044] The at least one film former can be selected from water-soluble polymers, either synthetic or natural in origin and may be chemically and / or physically modified. Suitable examples of water- soluble polymers include polyalkylene glycols (also referred to as polyalkylene oxides or polyoxyalkylenes), polyvinyl alcohols, polyacrylates, polymethacrylates, polyacrylamides, polyvinylpyrrolidones, and proteins / polypeptides or hydrolyzed products thereof (such as collagen and gelatin). Preferably, the film former is selected from the group consisting of polyalkylene glycols, polyvinyl alcohols, polyacrylates, polymethacrylates, polyacrylamides, polyvinylpyrrolidones, and combinations thereof. In a particularly preferred embodiment of the present invention, the at least one film former is a polyvinyl alcohol (PVOH or PVA).

[0045] In one embodiment, the at least one film former is a polyvinyl alcohol having a degree of hydrolysis of from 87 % to 89 %, more particularly 88 %, wherein the degree of hydrolysis is defined as the number percentage of hydrolyzed vinyl acetate moieties present in the polymer chain.

[0046] In one embodiment, the polyvinyl alcohol is sold under the tradename Selvol 21-205 (from Sekisui).

[0047] The film former may be present from about 16 wt% to about 23 wt%, preferably from about 18 wt% to about 22 wt%, such as about 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5 wt %, preferably about 19.0 wt% of the weight of the composition, on dry basis. In one embodiment, the film former is present in 18.9 wt% of the weight of the composition, on dry basis.

[0048] The thickening agents are required in order to provide the necessary viscosity to the substrate prior to drying. It is believed that the substrate becomes more viscous as the amount of thickening agents in the composition increases, thereby causing the composition to be hard to process. However, if the amount of thickening agents is too low, the substrate is not thick enough to be deposited onto a drying plate. The thickening agents are composed of polymers such as starch, modified starch, or cellulose that, when dried, produce a material that remains solid and flexible when dry, yet dissolves completely in water.

[0049] Starch includes, but is not limited to, corn starch, amyl corn starch, potato starch, rice starch, pea starch, cassava starch, wheat starch, waxy starch, and starch degradation products such as dextrins. Mixtures of the aforementioned types of starch, including their degradation products, are also possible. The substrate comprises one or more types of starch selected from the group consisting of corn starch, potato starch, rice starch, pea starch, cassava starch, wheat starch, waxy starch and dextrins. Preferably, the starch is corn starch. In one embodiment, the corn starch is sold under the tradename Purity 21 C Pure (from Nouryon).

[0050] The thickening agent may be present from about 35 wt% to about 42 wt%, preferably from about 37 wt% to about 40 wt%, such as about 37.5, 38.0, 38.5, 39.0, 39.5 wt %, preferably about 38.5 wt% of the weight of the composition, on dry basis. In one embodiment, the thickening agent is present in 38.3 wt% of the weight of the composition, on dry basis. In one embodiment, the weight ratio between the thickening agent to the at least one film former is between about 2.5:1 to about 1.5:1 , preferably about 2.0:1 , on dry basis. Such a ratio provides a desirable balance between the flow ability and the firmness of the composition before drying, in order to ease the manufacturing process.

[0051] In addition to the at least one film former and the thickening agent, the composition also comprises at least one plasticizer for modifying the physical properties of the film formerand thickening agent. It is believed that the addition of a plasticizer helps to provide flexibility to the composition after drying, thereby avoiding potential brittleness that may result from the presence of the other ingredients, thereby resulting in a soft to touch, flexible and smooth composition. Suitable plasticizers are, for example, pentaerythritols such as dipentaerythritol, sorbitol, mannitol and glycols such as glycerol (glycerin) or ethylene glycol. The at least one plasticizer is preferably glycerin. Residual water of up to about 10 wt% may be present in the composition after drying, but water is not considered as plasticizer in the context of the present invention.

[0052] The plasticizer may be present from about 8.0 wt% to about 15.0 wt%, preferably from about 10.0 wt% to about 13.0 wt%, such as about 10.5, 11.0, 11.5, 12.0, 12.5 wt% of the weight of the composition, on dry basis. In one embodiment, the plasticizer is present in about 12.5 wt% on dry basis. In one embodiment, the plasticizer is present in 12.7 wt% on dry basis.

[0053] The applicant has surprisingly and unexpectedly found that, for a given film-former, the substrate mechanical properties, the substrate water-solubility during laundering and the compatibility of the substrate for both surfactant and core-shell microcapsule composition were solely controlled by the weight ratio between the at least one film former and thickening agent to the at least one plasticizer. In particular, the optimum of these properties were attained at a weight ratio between the at least one film former and thickening agent to the at least one plasticizer of between about 3.5:1 to about 5.5:1 , preferably about 4.5:1 , on dry basis. Under such conditions, mixing the water-soluble substrate composition in suitable proportions with the surfactant and the microcapsule composition comprising a polymer encapsulating at least a fragrance ingredient produces a liquid which, after being poured onto a drying plate or into a drying container, and after evaporation of excess water, results in a solid sheet or a pellet that remains flexible, yet also water soluble.

[0054] Microcapsule Composition In the context of the present invention, the shell of the core-shell microcapsules can comprise a polymer selected from the group consisting of a melamine-formaldehyde polymer, a ureaformaldehyde polymer, a polyurea, a polyurethane, a polyamide, a polyacrylate, a polycarbonate, and mixtures thereof.

[0055] Thermosetting resins

[0056] Core-shell microcapsules with a shell of a melamine-formaldehyde polymer have proven to be particularly suitable for fragrance encapsulation. They are described in the prior art, for instance in WO 2008 / 098387 A1 , WO 2016 / 207180 A1 , WO 2017 / 001672 A1 and WO 2018 / 197266 A1.

[0057] Suitable examples of core-shell microcapsules comprise a shell surrounding the core, wherein the shell comprises a network of cross-linked resin, wherein the resin comprises a terpolymer and a polymeric stabilizer, wherein the terpolymer comprises moieties derived from at least one polyamine; moieties derived from a milk protein or a milk protein derivative; and moieties derived from the group consisting of alkylene and alkylenoxy moieties having 1 to 6 methylene units.

[0058] Also core-shell microcapsules with a shell of a polyurea or polyurethane polymer have been successfully used for perfume encapsulation. They have the advantage to address consumer concerns with regard to residual formaldehyde in the composition. Such capsules are also described in the prior art, for instance in WO 2016 / 071151 A1 and WO 2019 / 174978 A1.

[0059] In one embodiment, the shell comprises a thermosetting resin formed by reaction of a polyfunctional amine comprising at least one amino group with at least one polyfunctional isocyanate, wherein the shell further comprises a cationic polymer comprising quaternary ammonium groups, wherein the shell further comprises a polymeric stabilizer comprising fully or partially dissociated carboxylic acid groups, such as those described in WO 2023 / 017014 A1.

[0060] Core-shell microcapsules with a shell of a polyacrylate, i.e. one or more monoethylenically unsaturated and / or polyethylenically unsaturated monomer(s) in polymerized form, have also been successfully used for perfume encapsulation. Such capsules are described in the prior art, for instance in WO 2013 / 111912 A1 or WO 2014 / 032920 A1.

[0061] In one embodiment, the core-shell microcapsules comprise a shell comprising a thermosetting resin formed by the reaction of shell-forming monomers comprising a polyamine and a material comprising a plurality of olefinic double bonds capable of reacting with the polyamine, such as those described in WO 2019 / 121738 A1. Polymeric Stabiliser

[0062] In one embodiment, the shell comprises a thermosetting resin formed by the reaction of shellforming materials selected from monomers, pre-polymers and / or pre-condensates, and comprising a polymeric stabilizer that is the reaction product of a polymeric surfactant and a silane containing a functional group capable of forming covalent bonds with the shell, such as those described in WO 2019 / 121736 A1 .

[0063] In one embodiment, the shell may comprise a polymeric stabilizer that is formed by combination of a polymeric surfactant with at least one aminosilane. The polymeric surfactant comprises a polysaccharide comprising carboxylic acid groups. The aminosilane is as defined hereinbelow. The shell may further comprise a polysaccharide, preferably a polysaccharide comprising beta (1 —> 4) linked monosaccharide units, even more preferably a cellulose derivative, in particular selected form the group consisting of hydroxyethyl cellulose, hydroxypropylmethyl cellulose, cellulose acetate, carboxymethyl cellulose, and combinations thereof, preferably hydroxyethyl cellulose. Such capsules are described in the prior art, for instance in WO 2020 / 233887A1 .

[0064] Hydrated Polymer Phase and Polymeric Stabilizer

[0065] In one embodiment, the shell may comprise a hydrated polymer phase and a polymeric stabilizer at an interface between the shell and the core.

[0066] In such an arrangement, the polymeric stabilizer provides an impervious encapsulating material, whereas the hydrated polymer phase provides the desired deposition and adherence to the substrate. Furthermore, without being bound by any theory, it is surmised that the hydrated polymer phase also provides an optimal point of attack for microbial degradation.

[0067] The polymeric stabilizer may be selected from a broad range of film-forming materials and resins. Preferably, the polymeric stabilizer is highly cross-linked, in order to decrease significantly the diffusion of the encapsulated fragrance ingredient through the shell. Preferably the imperviousness of the shell is sufficiently high to significantly prevent the leakage of the fragrance ingredient in extractive base, such as consumer products comprising surfactants.

[0068] In one embodiment of the present invention, the polymeric stabilizer is a thermosetting resin. io Thermosetting resins are typically obtained by reacting polyfunctional monomers, such as amines, isocyanates, alcohols or phenols, chlorocarboxylic acids, (meth)acrylates, epoxides, silanes and aldehydes.

[0069] In one embodiment of the present invention, the polymeric stabilizer is formed by reaction of an aminosilane with a polyfunctional isocyanate. Such a polymeric stabilizer has the advantage of being highly crosslinked and susceptible of providing surface anchoring groups that can be used to immobilize additional materials to complete shell formation. These additional materials may comprise additional encapsulating materials, coatings and, as described in more details hereinafter, simple and complex coacervate, and hydrogels.

[0070] The aminosilane employed in the formation of the polymeric stabilizer can be selected from a compound of Formula (I).

[0071] Si(R1)(R2)f(OR3)(3-f> Formula (I) wherein R1is a linear or branched alkyl or alkenyl residue comprising an amine functional group; R2is each independently a linear or branched alkyl group with 1 to 4 carbon atoms; R3is each independently a H or a linear or branched alkyl group with 1 to 4 carbon atoms; and f is 0, 1 or 2.

[0072] The silane groups may undergo polycondensation reactions with one another to form a silica network at the oil / water interface that additionally stabilizes this interface.

[0073] In one embodiment, R2and R3are each independently methyl or ethyl.

[0074] In one embodiment, f is 0 or 1.

[0075] In one embodiment, R1is a C1-C12 linear or branched alkyl or alkenyl residue comprising an amine functional group. Optionally, R1is a C1-C4 linear or branched alkyl or alkenyl residue comprising an amine functional group.

[0076] In one embodiment, the amine functional group is a primary, a secondary or a tertiary amine.

[0077] In one embodiment, the at least one aminosilane is a bipodal aminosilane. By “bipodal aminosilane” it is meant a molecule comprising at least one amino group and two residues, each of these residues bearing at least one alkoxysilane moiety. Bipodal aminosilanes are particularly advantageous for forming stable oil-water interfaces, compared to conventional aminosilanes. Without wishing to be bound by theory, it is believed that this beneficial role is due to the particular, bi-directional arrangement of the silane moieties in the molecule of a bipodal aminosilane, which allows formation of a more tightly linked silica network at the oil-water interface.

[0078] In one embodiment, the bipodal aminosilane is a compound of Formula (II).

[0079] (O-R3)(3-f)(R2)fSi-R4-X-R4-Si(O-R3)(3-f)(R2)f Formula (II) wherein X is -NR5-, -NR5-CH2-NR5-, -NR5-CH2-CH2-NR5-, -NR5-CO-NR5-, or

[0080] R2is each independently a linear or branched alkyl group with 1 to 4 carbon atoms;

[0081] R3is each independently H or a linear or branched alkyl group with 1 to 4 carbon atoms;

[0082] R4is each independently a linear or branched alkylene group with 1 to 6 carbon atoms;

[0083] R5is each independently H, CH3or C2H5; and f is each independently 0, 1 or 2.

[0084] In one embodiment, R2is CH3or C2H5.

[0085] In one embodiment, R3is CH3or C2H5

[0086] In one embodiment, R4is -CH2-, -CH2-CH2- or -CH2-CH2-CH2-.

[0087] In one embodiment, R5is H or CH3.

[0088] In one embodiment, f is 0 or 1.

[0089] Examples of suitable bipodal 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)ethane-1 ,2-diamine, bis(3- (methyldimethoxysilyl)propyl)-N-methylamine, N,N’-bis(3-(triethoxysilyl) propyl)piperazine, and combinations thereof. In one embodiment, the bipodal aminosilane is bis(3-(triethoxysilyl)propyl)amine, which has the advantage of releasing ethanol instead of more toxic and less desirable methanol during the polycondensation of the ethoxysilane groups.

[0090] The bipodal aminosilane can be a secondary aminosilane. Using a secondary bipodal aminosilane instead of a primary aminosilane decreases the reactivity of the polymeric stabilizer with respect to electrophilic species, in particular aldehydes. Hence, fragrance ingredients containing high levels of aldehydes may be encapsulated with a lower propensity for adverse interactions between core-forming and shell-forming materials.

[0091] Other aminosilanes may also be used in combination with the aforementioned bipodal aminosilanes, in particular the aminosilanes described hereinabove.

[0092] The polyfunctional isocyanate may be selected from organic isocyanates, in which an isocyanate group is bonded to an organic residue (R-N=C=O or R-NCO). The polyfunctional isocyanate may be selected from alkyl, alicyclic, aromatic and alkylaromatic, as well as anionically modified polyfunctional isocyanates, with two or more (e.g. 3, 4, 5, etc.) isocyanate groups in a molecule, and mixtures thereof.

[0093] Preferably, the polyfunctional isocyanate is an aromatic or an alkylaromatic isocyanate, the alkylaromatic polyfunctional isocyanate having preferably methyl isocyanate groups attached to an aromatic ring. Both aromatic and methylisocyanate-substituted aromatic polyfunctional isocyanates have a superior reactivity compared to alkyl and alicyclic polyfunctional isocyanates. Among these, 2-ethylpropane-1 ,2,3-triyl tris((3-(isocyanatomethyl)phenyl)carbamate) is particularly preferred, because of its trifunctional nature that favors the formation of intermolecular cross-links and because of its intermediate reactivity that favors network homogeneity. This alkylaromatic polyfunctional isocyanate is commercially available under the trademark Takenate D-100 N, sold by Mitsui or under the trademark Desmodur® Quix175, sold by Covestro.

[0094] As an alternative to aromatic or alkylaromatic polyfunctional isocyanates, it may also be advantageous to add an anionically modified polyfunctional isocyanates, because of the ability of such polyfunctional isocyanates to react at the oil / water interface and even in the water phase close to the oil / water interface. A particularly suitable anionically modified polyfunctional isocyanate has Formula (III).

[0095] Formula (III)

[0096] Formula (III) shows a commercially available anionically modified polyisocyanate, which is a modified isocyanurate of hexamethylene diisocyanate, sold by Covestro under the trademark Bayhydur® XP2547.

[0097] In a preferred embodiment of the present invention, polyfunctional isocyanate is 2-ethylpropane- 1 ,2,3-triyl tris((3-(isocyanatomethyl)phenyl)carbamate). Particularly preferably, the polymeric stabilizer is formed by reaction of bis(3-(triethoxysilyl)propyl)amine and 2-ethylpropane-1 ,2,3-triyl tris((3-(isocyanatomethyl)phenyl)carbamate). The combination of this particular bipodal secondary aminosilane and polyfunctional isocyanate provides advantageous interface stability and release properties. The stabilized interface is sufficiently impervious to effectively encapsulate the at least one fragrance ingredient comprised in the core and possesses the desired surface functional groups.

[0098] In one embodiment, the shells may be as described in WO 2020 / 207849 A1 .

[0099] In preferred embodiments of the present invention the hydrated polymer phase can be a coacervate, in particular a complex coacervate.

[0100] By “complex coacervation” is meant the formation of an interfacial layer comprising a mixture of polyelectrolytes.

[0101] The phenomenon of coacervation may be observed under a light microscope, wherein it is marked by the appearance of a ring around the core composition droplet. This ring consists of the aforementioned polyelectrolyte-rich phase that has a different refractive index than the surrounding aqueous phase.

[0102] The coacervation of a polyelectrolyte is generally 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 may be achieved by changing the salt concentration or the pH of the medium. In a complex coacervation, complexation occurs at the pH where one of the polyelectrolytes has an overall positive electrical charge (polycation), whereas the other polyelectrolyte has an overall negative charge (polyanion), so that the overall electrical charge of the complex is neutral.

[0103] In preferred embodiments of the present invention, the coacervate may be formed from a polycation and a polyanion.

[0104] In one embodiment, the shell can comprise a complex coacervate formed of at least one protein and at least one polysaccharide. Such core-shell capsules have proved suitable for fragrance ingredient encapsulation and are described, for instance in WO 1996 / 020612 A1 , WO 2001 / 03825 A1 or WO 2015 / 150370 A1.

[0105] Preferably, the pH is used as parameter driving the coacervation. Thus, the polycation preferably has a pH-dependent electrical charge. This is the case for polymers bearing primary, secondary and tertiary amino groups, such as polyamines, for example chitosan, and most proteins, for example gelatin. Proteins have the additional advantage of being prone to temperaturedependent structural transitions that may also be used to control the morphology of the coacervates. In particular, varying the temperature of some proteins may induce the formation of secondary, tertiary or quaternary structures of the protein that may also be used to control the properties of the coacervate.

[0106] Chitosan has the advantage of being derived from chitin, which is a natural polymer.

[0107] In preferred embodiments of the present invention, the polycation is selected from the group consisting of proteins, chitosan, and combinations thereof.

[0108] More particularly, the polycation can be a protein selected from the group consisting of gelatin, casein, albumin, polylysine, soy proteins, pea proteins, rice proteins, hemp proteins, and combinations thereof.

[0109] In particularly preferred embodiments of the present invention, the at least one protein is a gelatin, even more preferably a Type B gelatin.

[0110] 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 mild acidic conditions. Gelatin is usually characterized by the so-called “Bloom Strength”. In the context of the present invention, the Bloom Strength refers to the rigidity of a gelatin film, as measured by so-called “Bloom Gelometer”, according to the Official Procedures of the Gelatin Manufacturers Institute of America, Inc., revised 2019, Chapter 2.1. According to this procedure, the Bloom Strength, expressed in Bloom, is equal to the weight, expressed in g, required to move vertically a standardized plunger, having a diameter of 12.5 mm, to a depth of 4 mm into a gelatin gel, which has been prepared under controlled conditions, i.e. by dissolving 6.67 wt.-% of gelatin in deionized water at 60 °C, in a standardized jar, and letting the gel form for 17 hours at 10 °C. The higher the weight is, the higher is the Bloom Strength of the gelatin used for making the tested gel.

[0111] In preferred embodiments of the present invention, the Type B gelatin has a Bloom Strength of 90 to 250 Bloom.

[0112] If the Bloom Strength is too low, the gel is mechanically weak and coacervates obtained therefrom may not form a self-standing layer of gelatin-rich phase around the core composition. If the Bloom Strength is too high, then the coacervates and the gelatin-rich phase obtained therefrom may be too brittle.

[0113] In preferred embodiments of the present invention, the Type B gelatin is obtainable from fish, because fish gelatin meets better acceptance within consumer than beef or pork gelatin, mainly due to health concerns, sociological context or religious rules.

[0114] Alternatively, the protein may be a vegetable protein, in particular a pea protein and / or a soy protein, which have the advantage of being vegan.

[0115] The polycation may be a denaturated protein. In the contrary to native proteins, denaturated proteins have been deprived from their ability to form secondary, tertiary or quaternary structures and are essentially amorphous. Such amorphous proteins may form more impervious films compared to native proteins and therefore also contribute to the encapsulating power of the shell. Denaturation may be achieved by treating the protein with chemical or physical means, such as acid or alkaline treatment, heat or exposure to hydrogen bond disrupting agents.

[0116] In cases where the polycation is chitosan, the chitosan can have a molecular weight between 3’000 and TOOO’OOO g / mol, more particularly between 10’000 and 500’000 g / mol, still more particularly between 30’000 and 300’000 g / mol. The polyanion may be any negatively charged polymer. However, as the pH is preferably used to control coacervation, it may be more advantageous that the electrical charge of the polymer is pH-dependent. Such polymer may be selected from polymers having pendent carboxylic groups, such as methacrylic acid and acrylic acid polymers and copolymers, hydrolyzed maleic anhydride copolymers and polysaccharides bearing carboxylic groups.

[0117] In preferred embodiments of the present invention, the polyanion is a polysaccharide comprising carboxylate groups and / or sulfate groups.

[0118] Polysaccharides comprising carboxylate groups are particularly suitable for complex coacervation with proteins. This is due to the fact that the net electrical charge of these polysaccharides may be adjusted by adjusting the pH, so that the complexation with ampholytic proteins is facilitated. Complexation occurs at the pH where the protein has an overall positive electrical charge, whereas the polysaccharide as an overall negative charge, so that the overall electrical charge of the complex is neutral. These polysaccharides include native polysaccharides, i.e. unmodified from nature, and modified polysaccharides.

[0119] The polysaccharide comprising carboxylic acid groups may comprise uronic acid units, in particular hexuronic acid units. Such polysaccharides are broadly available in nature.

[0120] The hexuronic acid units can be selected from the group consisting of galacturonic acid units, glucuronic acid units, in particular 4-O-methyl-glucuronic acid units, guluronic acid units, mannuronic acid units, and combinations thereof.

[0121] The polysaccharide comprising carboxylic acid groups may be branched. Branched polysaccharides comprising carboxylic acid groups have the advantage of forming more compact networks than linear polysaccharides and therefore may favor the imperviousness of the encapsulating shell, resulting in reduced leakage and greater encapsulation efficiency.

[0122] The carboxylate groups can be at least partially present in the form of the corresponding carboxylate salt, in particular the corresponding sodium, potassium, magnesium or calcium carboxylate salt.

[0123] In particular embodiments of the present invention, the polyanion is selected from the group consisting of pectin, gum arabic, alginate, and combinations thereof. Among the pectins, the carboxylic acid groups can be partially present in the form of the corresponding methyl ester. The percentage of carboxylic acid groups that are present in the form of the corresponding methyl ester can be from 3 % to 95 %, preferably from 4 % to 75 %, more preferably from 5 to 50 %. Pectins comprising carboxylic groups, of which 50 % or more are present in the form of the corresponding methyl ester, are referred to as “high methoxylated”. Pectins comprising carboxylic acid groups, of which less than 50 % are present in the form of the corresponding methyl ester, are referred to as “low methoxylated”.

[0124] Among the two variants of gum Arabic, i.e. gum acacia Senegal and gum acacia Seyal, gum acacia Senegal is preferred, owing to the higher level of glucuronic acid in gum acacia Senegal.

[0125] The hydrated polymer phase can be a hydrogel.

[0126] In context of the present invention, a “hydrogel” is a three-dimensional (3D) network of hydrophilic polymers that can swell in water, while maintaining the structure due to chemical or physical cross-linking of individual polymer chains.

[0127] Such a hydrogel can be formed by several methods at interfaces, especially by self-assembly of polyelectrolytes around existing interfaces, covalent grafting of pre-formed hydrogel particles in solution, polymerization of hydrosoluble monomers initiated at the interface and phase separation of water soluble macromolecules onto the interface.

[0128] To avoid any ambiguity, in context of the present invention, a coacervate, especially a complex coacervate, which is cross-liked, in particular by covalent bonds, is considered as a hydrogel.

[0129] The applicant has found that the use of hydrogels particularly enhances both the deposition and adherence of microcapsules on substrates, in particular on fabrics.

[0130] The hydrogel can be interlinked with the polymeric stabilizer, in particular via the functional groups present on the surface of this stabilizer.

[0131] This allows the locking of the hydrogel layer onto the polymeric stabilizer present at droplet interface, making the shell composed of a polymer composite, instead of only a blend.

[0132] Both hydrogel cross-linking and hydrogel interlinking with the polymeric stabilizer may be performed sequentially or simultaneously. In preferred embodiments of the present invention, the hydrogel is a crosslinked coacervate, in particular a complex coacervate crosslinked with polyfunctional aldehyde, more particularly a difunctional aldehyde selected from the group consisting of succinaldehyde, glutaraldehyde, glyoxal, benzene-1 ,2-dialdehyde, benzene-1 ,3-dialdehyde, benzene-1 ,4-dialdehyde, piperazine- N,N-dialdehyde, 2,2'-bipyridyl-5,5'-dialdehyde, and combinations thereof. Difunctional aldehydes are known to be effective cross-linking agents for proteins.

[0133] 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 complex coacervate is described in WO 2021 / 239742 A1.

[0134] The hydrogel can be thermosensitive and possess a gelation temperature, in particular 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 fabric can increase, when washing the fabric at a temperature which is above hydrogel gelation temperature.

[0135] The shell can be further stabilized with a stabilizing agent. Preferably the stabilizing agent comprises at least two carboxylic acid groups. Even more preferably, the stabilizing agent is selected from the group consisting of citric acid, benzene-1 ,3,5-tricarboxylic acid, benzene-1 ,2,4- tricarboxylic acid, 2,5-furandicarboxylic acid, itaconic acid, poly(itaconic acid) and combinations thereof.

[0136] In one embodiment, the core-shell microcapsules may be as described in WO 2023 / 020883A1 .

[0137] In one embodiment, the shell comprises a polymeric stabilizer that is formed by combination of a polymeric surfactant with at least one aminosilane; a hydrocollolid; and a linker derived from an epoxy resin. The polymeric surfactant and at least one aminosilane are as defined hereinabove. In one embodiment, hydrocolloid is selected from the group consisting of polysaccharides, such as pectin, modified starches, guar gum, locust bean gum, konjac mannan, gum arabic, gum ghatti, tragacanth, agar, alginates and carrageenan; proteins such as gelatin; and combinations thereof. In one embodiment, the epoxy resin is selected from the group consisting of epoxidised plant oils, epoxidised alcohols, epoxidised furans, epoxidised phenols and combinations thereof.

[0138] In one embodiment, the core-shell microcapsules may be as described in WO 2023 / 170102A1.

[0139] In one embodiment, the shell comprises a first and a second polyelectrolyte which form a complex coacervate, and wherein the microcapsule comprises at least one interfacial enabler. In one embodiment, the interfacial enabler is or is derived from a diacid or a dialdehyde, such as the shells described in WO 2022 / 112204 A1 .

[0140] In one embodiment, the shell of the microcapsules can be made of a biodegradable material or a non-biodegradable material. In one embodiment, the microcapsules are made of a biodegradable material.

[0141] In preferred embodiments of the present invention, the volume median diameter Dv(50) of the plurality of core-shell microcapsules is from 1 to 100 pm, preferably 5 to 75 pm, more preferably 8 to 60 pm, even more preferably 10 to 30 pm. Microcapsules having volume median diameter in the range from 10 to 30 pm show optimal deposition on various substrates, such as fabrics and hair.

[0142] Fragrance Ingredient

[0143] A comprehensive list of fragrance ingredients that may be encapsulated in accordance with the present invention may be found in the perfumery literature, for example “Perfume & Flavor Chemicals”, S. Arctander (Allured Publishing, 1994). Encapsulated fragrance ingredients according to the present invention preferably comprise fragrance ingredients selected from the group consisting of ACETYL ISOEUGENOL ((E)-2-methoxy-4-(prop-1-en-1-yl)phenyl acetate); ADOXAL (2,6,10-trimethylundec-9-enal); AGRUMEX (2-(tert-butyl)cyclohexyl acetate); ALDEHYDE C 10 DECYLIC (decanal); ALDEHYDE C 11 MOA (2-methyldecanal); ALDEHYDE C 11 UNDECYLENIC (undec-10-enal); ALDEHYDE C 110 UNDECYLIC (undecanal);

[0144] ALDEHYDE C 12 LAURIC (dodecanal); ALDEHYDE C 12 MNA PURE (2-methylundecanal); ALDEHYDE C 8 OCTYLIC (octanal); ALDEHYDE C 9 ISONONYLIC (3,5,5-trimethylhexanal); ALDEHYDE C 9 NONYLIC FOOD GRADE (nonanal); ALDEHYDE C 90 NONENYLIC ((E)-non- 2-enal); ALDEHYDE ISO C 11 ((E)-undec-9-enal); ALDEHYDE MANDARINE ((E)-dodec-2- enal); ALLYL AMYL GLYCOLATE (prop-2-enyl 2-(3-methylbutoxy)acetate); ALLYL CAPROATE (prop-2-enyl hexanoate); ALLYL CYCLOHEXYL PROPIONATE (prop-2-enyl 3- cyclohexylpropanoate); ALLYL OENANTHATE (prop-2-enyl heptanoate); AMBER CORE1-((2- (tert-butyl)cyclohexyl)oxy)butan-2-olAMBERKETAL (3,8,8, 11a-tetramethyldodecahydro-1 H-3,5a- epoxynaphtho[2,1-c]oxepine); AMBERMAX (2-(2,2,7,7-Tetramethyltricyclo[6.2.1.0](1 ,6)undec-4- en-5-yl)propan-1-ol and 2-(2,2,7,7-Tetramethyltricyclo[6.2.1.0](1 ,6)undec-5-en-5-yl)propan-1-ol); AMBRETTOLIDE ((Z)-oxacycloheptadec-10-en-2-one); AMBROFIX ((3aR,5aS,9aS,9bR)- 3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1 H-benzo[e][1]benzofuran); AMYL BUTYRATE (pentyl butanoate); AMYL CINNAMIC ALDEHYDE ((Z)-2-benzylideneheptanal); AMYL SALICYLATE (pentyl 2-hydroxybenzoate); ANETHOLE SYNTHETIC ((E)-1-methoxy-4- (prop-1-en-1-yl)benzene); ANISYL ACETATE (4-methoxybenzyl acetate); APHERMATE (1-(3,3- dimethylcyclohexyl)ethyl formate); AUBEPINE PARA CRESOL (4-methoxybenzaldehyde); AURANTIOL ((E)-methyl 2-((7-hydroxy-3,7-dimethyloctylidene)amino)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); BENZYL ACETONE (4-phenylbutan-2-one); BENZYL BENZOATE (benzyl benzoate); BENZYL SALICYLATE (benzyl 2-hydroxybenzoate); BERRYFLOR (ethyl 6-acetoxyhexanoate); BICYCLO NONALACTONE (octahydro-2H-chromen-2-one); BOISAMBRENE FORTE ((ethoxymethoxy)cyclododecane); BOISIRIS ((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]heptan-2-ol); BORNYL ACETATE ((2S.4S)- 1 ,7,7-trimethylbicyclo[2.2.1]heptan-2-yl acetate); BOURGEONAL (3-(4-(tert- butyl)phenyl)propanal); BUTYL BUTYRO LACTATE (1-butoxy-1-oxopropan-2-yl butanoate); BUTYL CYCLOHEXYL ACETATE PARA (4-(tert-butyl)cyclohexyl acetate); BUTYL QUINOLINE SECONDARY (2-(2-methylpropyl)quinoline); CAMPHOR SYNTHETIC ((1S,4S)-1 ,7,7- trimethylbicyclo[2.2.1]heptan-2-one); CARVACROL (5-isopropyl-2-methylphenol); CARVONE LAEVO ((5R)-2-methyl-5-prop-1-en-2-ylcyclohex-2-en-1-one); CASHMERAN (1 , 1 ,2, 3,3- pentamethyl-2,3,6,7-tetrahydro-1 H-inden-4(5H)-one); CASSYRANE (5-tert-butyl-2-methyl-5- propyl-2H-furan); CEDRENE ((1S,8aR)-1 ,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1 H-5,8a- methanoazulene); CEDRYL ACETATE ((1 S,6R,8aR)-1 ,4,4,6-tetramethyloctahydro-1 H-5,8a- methanoazulen-6-yl acetate); CEDRYL METHYL ETHER ((1 R,6S,8aS)-6-methoxy-1 , 4,4,6- tetramethyloctahydro-1 H-5,8a-methanoazulene); CETONE V ((E)-1-(2,6,6-trimethylcyclohex-2- en-1-yl)hepta-1 ,6-dien-3-one); CINNAMIC ALCOHOL SYNTHETIC ((E)-3-phenylprop-2-en-1-ol); CINNAMIC ALDEHYDE ((2E)-3-phenylprop-2-enal); Cl N NAM YL 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-dimethylocta-2,6-dienal); CITRATHAL R ((Z)-1 ,1-diethoxy-3,7-dimethylocta-2,6-diene); CITRONELLAL (3,7-dimethyloct-6-enal);

[0145] CITRONELLOL EXTRA (3,7-dimethyloct-6-en-1-ol); CITRON ELLYL ACETATE (3,7-dimethyloct- 6-en-1-yl acetate); CITRONELLYL FORMATE (3,7-dimethyloct-6-en-1-yl formate);

[0146] CITRONELLYL NITRILE (3,7-dimethyloct-6-enenitrile); CLONAL (dodecanenitrile); CORANOL (4-cyclohexyl-2-methylbutan-2-ol); COSMONE ((Z)-3-methylcyclotetradec-5-enone); COUMARIN PURE CRYSTALS (2H-chromen-2-one); CRESYL ACETATE PARA ((4- methylphenyl) acetate); CRESYL METHYL ETHER PARA (1-methoxy-4-methylbenzene); CUMIN NITRILE (4-isopropylbenzonitrile); CYCLAL C (2,4-dimethylcyclohex-3-ene-1- carbaldehyde); CYCLAMEN ALDEHYDE EXTRA (3-(4-isopropylphenyl)-2-methylpropanal); CYCLOGALBANATE (allyl 2-(cyclohexyloxy)acetate); CYCLOHEXYL ETHYL ACETATE (2- cyclohexylethyl acetate); CYCLOHEXYL SALICYLATE (cyclohexyl 2-hydroxybenzoate); CYCLOMYRAL (8,8-dimethyl-1 ,2,3,4,5,6,7,8-octahydronaphthalene-2-carbaldehyde); CYMENE PARA (1-methyl-4-propan-2-ylbenzene); DAMASCENONE ((E)-1-(2,6,6-trimethylcyclohexa-1 ,3- dien-1-yl)but-2-en-1-one); DAMASCONE ALPHA ((E)-1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2- en-1-one); DAMASCONE DELTA (1-(2,6,6-trimethyl-1-cyclohex-3-enyl)but-2-en-1-one); DECALACTONE GAMMA (5-hexyloxolan-2-one); DECENAL-4-TRANS ((E)-dec-4-enal); DELPHONE (2-pentylcyclopentanone); DELTA-3 CARENE ((1S,6S)-3,7,7- trimethylbicyclo[4.1.0]hept-3-ene); DIHEXYL FUMARATE (dihexyl-but-2-enedioate); DIHYDRO ANETHOLE (1-methoxy-4-propylbenzene); DIHYDRO JASMONE (3-methyl-2-pentylcyclopent- 2-enone); DIHYDRO MYRCENOL (2,6-dimethyloct-7-en-2-ol); DIMETHYL ANTHRANILATE (methyl 2-(methylamino)benzoate); DIMETHYL BENZYL CARBINOL (2-methyl-1-phenylpropan- 2-ol); DIMETHYL BENZYL CARBINYL ACETATE (2-methyl-1-phenylpropan-2-yl acetate); DIMETHYL BENZYL CARBINYL BUTYRATE (2-methyl-1-phenylpropan-2-yl butanoate); DIMETHYL OCTENONE (4,7-dimethyloct-6-en-3-one); DIMETOL (2,6-dimethylheptan-2-ol); DIPENTENE (1-methyl-4-(prop-1-en-2-yl)cyclohex-1-ene); DIPHENYL OXIDE (oxydibenzene); DODECALACTONE DELTA (6-heptyltetrahydro-2H-pyran-2-one); DODECALACTONE GAMMA (5-octyloxolan-2-one); DODECENAL ((E)-dodec-2-enal); DUPICAL ((E)-4-((3aS,7aS)- hexahydro-1 H-4,7-methanoinden-5(6H)-ylidene)butanal); EBANOL ((E)-3-methyl-5-(2,2,3- trimethylcyclopent-3-en-1-yl)pent-4-en-2-ol); ESTERLY (ethyl cyclohexyl carboxylate); ETHYL ACETATE (ethyl acetate); ETHYL ACETOACETATE (ethyl 3-oxobutanoate); ETHYL CINNAMATE (ethyl 3-phenylprop-2-enoate); ETHYL HEXANOATE (ethyl hexanoate); ETHYL LINALOOL ((E)-3,7-dimethylnona-1 ,6-dien-3-ol); ETHYL LINALYL ACETATE ((Z)-3,7- dimethylnona-1 ,6-dien-3-yl acetate); ETHYL MALTOL (2-ethyl-3-hydroxy-4H-pyran-4-one); ETHYL METHYL-2-BUTYRATE (ethyl 2-methylbutanoate); ETHYL OCTANOATE (ethyl octanoate); ETHYL OENANTHATE (ethyl heptanoate); ETHYL PHENYL GLYCIDATE (ethyl 3- phenyloxirane-2-carboxylate); ETHYL SAFRANATE (ethyl 2,6,6-trimethylcyclohexa-1 ,3-diene-1- carboxylate); ETHYL VANILLIN (3-ethoxy-4-hydroxybenzaldehyde); ETHYLENE BRASSYLATE (1 ,4-dioxacycloheptadecane-5, 17-dione); EUCALYPTOL ((1 s,4s)-1 ,3,3-trimethyl-2- oxabicyclo[2.2.2]octane); EUGENOL (4-allyl-2-methoxyphenol); EVERNYL (methyl 2,4- dihydroxy-3,6-dimethylbenzoate); FENCHYL ACETATE ((2S)-1 ,3,3- trimethylbicyclo[2.2.1]heptan-2-yl acetate); FENCHYL ALCOHOL ((1S,2R,4R)-1 ,3,3- trimethylbicyclo[2.2.1]heptan-2-ol); FENNALDEHYDE (3-(4-methoxyphenyl)-2-methylpropanal); FIXAMBRENE (3a,6,6,9a-tetramethyldodecahydronaphtho[2,1-b]furan); FIXOLIDE (1- (3,5,5,6,8,8-hexamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)ethanone); FLORALOZONE (3-(4- ethylphenyl)-2,2-dimethylpropanal); FLORHYDRAL (3-(3-isopropylphenyl)butanal); FLORIDILE ((E)-undec-9-enenitrile); FLOROCYCLENE ((3aR,6S,7aS)-3a,4,5,6,7,7a-hexahydro-1 H-4,7- methanoinden-6-yl propanoate); FLOROPAL (2,4,6-trimethyl-4-phenyl-1 ,3-dioxane); FLOROSA HO (tetrahydro-4-methyl-2-(2-methylpropyl)-2H-pyran-4-ol); FRESKOMENTHE (2-(sec- butyl)cyclohexanone); FRUCTONE (ethyl 2-(2-methyl-1 ,3-dioxolan-2-yl)acetate); FRUITATE ((3aS,4S,7R,7aS)-ethyl octahydro-1 H-4,7-methanoindene-3a-carboxylate); FRUTONILE (2- methyldecanenitrile); GALBANONE PURE (1-(5,5-dimethylcyclohex-1-en-1-yl)pent-4-en-1-one); GARDENOL (1 -phenylethyl acetate); GARDOCYCLENE ((3aR,6S,7aS)-3a,4,5,6,7,7a- hexahydro-1 H-4,7-methanoinden-6-yl 2-methyl propanoate); GERANIOL ((E)-3,7-dimethylocta- 2,6-dien-1-ol); GERANYL ACETATE ((E)-3,7-dimethylocta-2,6-dien-1-yl acetate); GERANYL CROTONATE ((E)-3,7-dimethylocta-2,6-dien-1-yl but-2-enoate); GERANYL ISOBUTYRATE ((E)-3,7-dimethylocta-2,6-dien-1-yl 2-methylpropanoate); GIVESCONE (ethyl 2-ethyl-6,6- dimethylcyclohex-2-enecarboxylate); HABANOLIDE ((E)-oxacyclohexadec-12-en-2-one); HEDIONE (methyl 3-oxo-2-pentylcyclopentaneacetate); HELIOTROPINE CRYSTALS (benzo[d][1 ,3]dioxole-5-carbaldehyde); HERBANATE ((2S)-ethyl 3-isopropylbicyclo[2.2.1]hept-5- ene-2-carboxylate); HEXENAL-2-TRANS ((E)-hex-2-enal); HEXENOL-3-CIS ((Z)-hex-3-en-1-ol); HEXENYL-3-CIS ACETATE ((Z)-hex-3-en-1-yl acetate); HEXENYL-3-CIS BUTYRATE ((Z)-hex-

[0147] 3-en-1-yl butanoate); HEXENYL-3-CIS ISOBUTYRATE ((Z)-hex-3-en-1-yl 2-methylpropanoate); HEXENYL-3-CIS SALICYLATE ((Z)-hex-3-en-1-yl 2-hydroxybenzoate); HEXYL ACETATE (hexyl acetate); HEXYL BENZOATE (hexyl benzoate); HEXYL BUTYRATE (hexyl butanoate); HEXYL CINNAMIC ALDEHYDE ((E)-2-benzylideneoctanal); HEXYL ISOBUTYRATE (hexyl 2- methyl propanoate); HEXYL SALICYLATE (hexyl 2-hydroxybenzoate);

[0148] HYDROXYCITRONELLAL (7-hydroxy-3,7-dimethyloctanal); INDOFLOR (4, 4a, 5,9b- tetrahydroindeno[1 ,2-d][1 ,3]dioxine); INDOLE PURE (1 H-indole); INDOLENE (8,8-di(1 H-indol-3- yl)-2,6-dimethyloctan-2-ol); IONONE BETA ((E)-4-(2,6,6-trimethylcyclohex-1-en-1-yl)but-3-en-2- one); IRISANTHEME ((E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); IRISONE ALPHA ((E)-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); IRONE ALPHA ((E)-

[0149] 4-(2,5,6,6-tetramethylcyclohex-2-en-1-yl)but-3-en-2-one); ISO E SUPER (1-(2,3,8,8-tetramethyl- 1 ,2,3,4,5,6,7,8-octahydronaphthalen-2-yl)ethanone); ISOAMYL ACETATE (3-methylbutyl acetate); ISOAMYL BUTYRATE (3-methylbutyl butanoate); ISOBUTYL METHOXY PYRAZINE (2-methylpropyl 3-methoxypyrazine); ISOCYCLOCITRAL (2,4,6-trimethylcyclohex-3- enecarbaldehyde); ISOEUGENOL ((E)-2-methoxy-4-(prop-1-en-1-yl)phenol); ISOJASMONE B 11 (2-hexylcyclopent-2-en-1-one); ISOMENTHONE DL (2-isopropyl-5-methylcyclohexanone); ISONONYL ACETATE (3, 5, 5-tri methyl hexyl acetate); ISOPROPYL METHYL-2- BUTYRATE (isopropyl 2-methylbutanoate); ISOPROPYL QUINOLINE (6-isopropylquinoline); ISORALDEINE ((E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one); JASMACYCLENE ((3aR,6S,7aS)-3a,4,5,6,7,7a-hexahydro-1 H-4,7-methanoinden-6-yl acetate); JASMONE CIS ((Z)-3-methyl-2-(pent-2-en-1-yl)cyclopent-2-enone); JASMONYL (3-butyl-5-methyltetrahydro-2H- pyran-4-yl acetate); JASMOPYRANE FORTE (3-pentyltetrahydro-2H-pyran-4-yl acetate); JAVANOL ((1-methyl-2-((1 ,2,2-trimethylbicyclo[3.1 .0]hexan-3-yl)methyl)cyclopropyl)methanol); KOAVONE ((Z)-3,4,5,6,6-pentamethylhept-3-en-2-one); LAITONE (8-isopropyl-1- oxaspiro[4.5]decan-2-one); LEAF ACETAL ((Z)-1-(1-ethoxyethoxy)hex-3-ene); LEMONILE ((2E,6Z)-3,7-dimethylnona-2,6-dienenitrile); LIFFAROME ((Z)-hex-3-en-1-yl methyl carbonate); LILIAL (3-(4-(tert-butyl)phenyl)-2-methylpropanal); LINALOOL (3,7-dimethylocta-1 ,6-dien-3-ol); LINALOOL OXIDE (2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propan-2-ol); LINALYL ACETATE (3,7-dimethylocta-1 ,6-dien-3-yl acetate); MAHONIAL ((4E)-9-hydroxy-5,9-dimethyl-4-decenal); MALTOL (3-hydroxy-2-methyl-4H-pyran-4-one); MALTYL ISOBUTYRATE (2-methyl-4-oxo-4H- pyran-3-yl 2-methylpropanoate); MANZANATE (ethyl 2-methylpentanoate); MAYOL ((4- isopropylcyclohexyl)methanol); MEFROSOL (3-methyl-5-phenylpentan-1-ol); MELONAL (2,6- dimethylhept-5-enal); MERCAPTO-8-METHANE-3-ONE (mercapto-para-menthan-3-one);

[0150] METHYL ANTHRANILATE (methyl 2-aminobenzoate); METHYL BENZOATE (methyl benzoate); METHYL CEDRYL KETONE (1-((1S,8aS)-1 ,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1 H-5,8a- methanoazulen-7-yl)ethanone); METHYL CINNAMATE (methyl 3-phenylprop-2-enoate);

[0151] METHYL DIANTILIS (2-ethoxy-4-(methoxymethyl)phenol); METHYL DIHYDRO ISOJASMONATE (methyl 2-hexyl-3-oxocyclopentane-1-carboxylate); METHYL HEPTENONE PURE (6-methylhept-5-en-2-one); METHYL LAITONE (8-methyl-1-oxaspiro[4.5]decan-2-one); METHYL NONYL KETONE (undecan-2-one); METHYL OCTYNE CARBONATE (methyl non-2- ynoate); METHYL PAMPLEMOUSSE (6,6-dimethoxy-2,5,5-trimethylhex-2-ene); METHYL SALICYLATE (methyl 2-hydroxybenzoate); MUSCENONE ((Z)-3-methylcyclopentadec-5- enone); MYRALDENE (4-(4-methylpent-3-en-1-yl)cyclohex-3-enecarbaldehyde); MYRCENE (7- methyl-3-methyleneocta-1 ,6-diene); MYSTIKAL (2-methylundecanoic acid); NECTARYL (2-(2- (4-methylcyclohex-3-en-1-yl)propyl)cyclopentanone); NEOBERGAMATE FORTE (2-methyl-6- methyleneoct-7-en-2-yl acetate); NEOCASPIRENE EXTRA (10-isopropyl-2,7-dimethyl-1- oxaspiro[4.5]deca-3,6-diene); NEOFOLIONE ((E)-methyl non-2-enoate); NEROLEX ((2Z)-3,7- dimethylocta-2,6-dien-1-ol); NEROLIDOL ((Z)-3,7,11-trimethyldodeca-1 ,6, 10-trien-3-ol) ;

[0152] NEROLIDYLE ((Z)-3,7,11-trimethyldodeca-1 ,6, 10-trien-3-yl acetate); NEROLINE CRYSTALS (2- ethoxynaphthalene); NEROLIONE (1-(3-methylbenzofuran-2-yl)ethanone); NERYL ACETATE ((Z)-3,7-dimethylocta-2,6-dien-1-yl acetate); NIRVANOLIDE ((E)-13-methyloxacyclopentadec- 10-en-2-one); NONADIENAL ((2E,6Z)-nona-2,6-dienal); NONADIENOL-2,6 ((2Z,6E)-2,6- nonadien-1-ol); NONADYL (6,8-dimethylnonan-2-ol); NONALACTONE GAMMA (5-pentyloxolan- 2-one); NONENAL-6-CIS ((Z)-non-6-enal); NONENOL-6-CIS ((Z)-non-6-en-1-ol); NOPYL ACETATE (2-(6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl)ethyl acetate); NYMPHEAL (3-(4-(2- methylpropyl)-2-methylphenyl)propanal); OCTALACTONE DELTA (6-propyltetrahydro-2H-pyran- 2-one); METHYL HEXYL KETONE (octan-2-one); GRANGER CRYSTALS (1-(2-naphtalenyl)- ethanone); ORIVONE (4-(tert-pentyl)cyclohexanone); PANDANOL ((2-methoxyethyl) benzene); PARA TERT BUTYL CYCLOHEXYL ACETATE (4-(tert-butyl)cyclohexyl acetate); PARADISAMIDE (2-ethyl-N-methyl-N-(m-tolyl)butanamide); PEACH PURE (5- heptyldihydrofuran-2(3H)-one); PELARGENE (2-methyl-4-methylene-6-phenyltetrahydro-2H- pyran); PELARGOL (3,7-dimethyloctan-1-ol); PEONILE (2-cyclohexylidene-2-phenylacetonitrile); PETALIA (2-cyclohexylidene-2-(o-tolyl)acetonitrile); PHARAONE (2-cyclohexylhepta-1 ,6-dien-3- one); PHENOXY ETHYL ISOBUTYRATE (2-(phenoxy)ethyl 2-methylpropanoate); PHENYL ACETALDEHYDE (2-phenyl-ethanal); PHENYL ETHYL ACETATE (2-phenylethyl acetate); PHENYL ETHYL ALCOHOL (2-phenylethanol); PHENYL ETHYL ISOBUTYRATE (2-phenylethyl 2-methylpropanoate); PHENYL ETHYL PHENYL ACETATE (2-phenylethyl 2-phenylacetate); PHENYL PROPYL ALCOHOL (3-phenylpropan-1-ol); PINENE ALPHA (2,6,6- trimethylbicyclo[3.1.1]hept-2-ene); PINENE BETA (6,6-dimethyl-2- methylenebicyclo[3.1.1]heptane); PI NOACETALDEHYDE (3-(6,6-dimethylbicyclo[3.1 .1]hept-2- en-2-yl)propanal); PIVAROSE (2,2-dimethyl-2-pheylethyl propanoate); POMAROSE ((2E,5E)- 5,6,7-trimethylocta-2,5-dien-4-one); POMELOL (2,4,7-Trimethyl-6-octen-1-ol);

[0153] PRECYCLEMONE B (1-methyl-4-(4-methylpent-3-en-1-yl)cyclohex-3-enecarbaldehyde); PRENYL ACETATE (3-methylbut-2-en-1-yl acetate); PRUNOLIDE (5-pentyldihydrofuran-2(3H)- one); RADJANOL SUPER ((E)-2-ethyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)but-2-en-1-ol); RASPBERRY KETONE (4-(4-hydroxyphenyl)butan-2-one); RHUBAFURAN (2,4-dimethyl-4- phenyltetrahydrofuran); ROSACETOL (2, 2, 2-trichloro-1 -phenylethyl acetate); ROSALVA (dec-9- en-1-ol); ROSE OXIDE (4-methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H-pyran); ROSE OXIDE CO (4-methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H-pyran); ROSYFOLIA (1-methyl-2-(5- methylhex-4-en-2-yl)cyclopropylmethanol); ROSYRANE SUPER (4-methyl-2-phenyl-3,6-dihydro- 2H-pyran); SAFRALEINE (2, 3, 3-trimethyl-1 -indanone); SAFRANAL (2,6,6-trimethylcyclohexa- 1 ,3-dienecarbaldehyde); SANDALORE EXTRA (3-methyl-5-(2,2,3-trimethylcyclopent-3-en-1- yl)pentan-2-ol); SCENTAURUS CLEAN (ethyl (Z)-2-acetyl-4-methyltridec-2-enoate); SCENTAURUS JUICY (4-(dodecylthio)-4-methylpentan-2-one); SERENOLIDE (2-(1-(3,3- dimethylcyclohexyl)ethoxy)-2-methylpropyl cyclopropanecarboxylate); SILVANONE SUPRA (cyclopentadecanone, hexadecanolide); SILVIAL (2-methyl-3-[4-(2- methylpropyl)phenyl]propanal); SPIROGALBANONE (1-(spiro[4.5]dec-6-en-7-yl)pent-4-en-1- one); STEMONE ((E)-5-methylheptan-3-one oxime); STYRALLYL ACETATE (1-phenylethyl acetate); SUPER MUGUET ((E)-6-ethyl-3-methyloct-6-en-1-ol); SYLKOLIDE ((E)-2-((3,5- dimethylhex-3-en-2-yl)oxy)-2-methylpropyl cyclopropanecarboxylate); TERPINENE ALPHA (1- methyl-4-propan-2-ylcyclohexa-1 ,3-diene); TERPINENE GAMMA (1-methyl-4-propan-2- ylcyclohexa-1 ,4-diene); TERPINEOL (2-(4-methylcyclohex-3-en-1-yl)propan-2-ol); TERPINEOL ALPHA (2-(4-methyl-1-cyclohex-3-enyl)propan-2-ol); TERPINEOL PURE (2-(4-methylcyclohex- 3-en-1-yl)propan-2-ol); TERPINOLENE (1-methyl-4-(propan-2-ylidene)cyclohex-1-ene);

[0154] TERPINYL ACETATE (2-(4-methyl-1-cyclohex-3-enyl)propan-2-yl acetate); TETRAHYDRO LINALOOL (3,7-dimethyloctan-3-ol); TETRAHYDRO MYRCENOL (2,6-dimethyloctan-2-ol); THIBETOLIDE (oxacyclohexadecan-2-one); THYMOL (2-isopropyl-5-methylphenol);

[0155] TOSCANOL (1-(cyclopropylmethyl)-4-methoxybenzene); TRICYCLAL (2,4-dimethylcyclohex-3- enecarbaldehyde); TRIDECENE-2-NITRILE ((E)-tridec-2-enenitrile); TRIFERNAL (3- phenylbutanal); TROPIONAL (3-(benzo[d][1 ,3]dioxol-5-yl)-2-methylpropanal); TROPIONAL (3- (benzo[d][1 ,3]dioxol-5-yl)-2-methylpropanal); UNDECATRIENE ((3E,5Z)-undeca-1 ,3,5-triene); UNDECAVERTOL ((E)-4-methyldec-3-en-5-ol); VANILLIN (4-hydroxy-3-methoxybenzaldehyde); VELOUTONE (2,2,5-trimethyl-5-pentylcyclopentanone); VELVIONE ((Z)-cyclohexadec-5-enone); VIOLET NITRILE ((2E,6Z)-nona-2,6-dienenitrile); YARA YARA (2-methoxynaphtalene); ZINARINE (2-(2,4-dimethylcyclohexyl)pyridine; BOIS CEDRE ESS CHINE (cedar wood oil); EUCALYPTUS GLOBULUS ESS CHINA (eucalyptus oil); GALBANUM ESS (galbanum oil); GIROFLE FEUILLES ESS RECT MADAGASCAR (clove oil); LAVANDIN GROSSO OIL FRANCE ORPUR (lavandin oil); MANDARIN OIL WASHED COSMOS (mandarin oil); ORANGE TERPENES (orange terpenes); PATCHOULI ESS INDONESIE (patchouli oil); and YLANG ECO ESSENCE (ylang oil). These fragrance ingredients are particularly suitable for obtaining stable and performing microcapsules, owing to their favorable lipophilicity and olfactive performance.

[0156] In one embodiment of the present invention, more than 75 %, preferably more than 80 %, even more preferably more than 85 %, even still more preferably more than 90 %, even yet still more preferably more than 95 %, of the fragrance ingredients are biodegradable and selected from ACETYL ISOEUGENOL ((E)-2-methoxy-4-(prop-1-en-1-yl)phenyl acetate); ADOXAL (2,6,10- trimethylundec-9-enal); AGRUMEX (2-(tert-butyl)cyclohexyl acetate); ALDEHYDE C 10 DECYLIC (decanal); ALDEHYDE C 11 UNDECYLENIC (undec-10-enal); ALDEHYDE C 110 UNDECYLIC (undecanal); ALDEHYDE C 12 LAURIC (dodecanal); ALDEHYDE C 12 MNA (2- methylundecanal); ALDEHYDE C 8 OCTYLIC (octanal); CYCLAMEN ALDEHYDE EXTRA (3-(4- isopropylphenyl)-2-methylpropanal); ALDEHYDE ISO C 11 ((E)-undec-9-enal); ALLYL AMYL GLYCOLATE (prop-2-enyl 2-(3-methylbutoxy)acetate); ALLYL CYCLOHEXYL PROPIONATE (prop-2-enyl 3-cyclohexylpropanoate); ALLYL OENANTHATE (prop-2-enyl heptanoate);

[0157] AMBRETTOLIDE ((Z)-oxacycloheptadec-10-en-2-one); AMBROFIX ((3aR,5aS,9aS,9bR)- 3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1 H-benzo[e][1]benzofuran); AMYL SALICYLATE (pentyl 2-hydroxybenzoate); AUBEPINE PARA CRESOL (4- methoxybenzaldehyde); BENZYL ACETATE (benzyl acetate); BENZYL SALICYLATE (benzyl 2- hydroxybenzoate); BORNYL ACETATE ((2S,4S)-1 ,7,7-trimethylbicyclo[2.2.1]heptan-2-yl acetate); CARVACROL (5-isopropyl-2-methylphenol); CEDRENE ((1S,8aR)-1 ,4,4,6-tetramethyl- 2,3,3a,4,5,8-hexahydro-1 H-5,8a-methanoazulene); CEDRYL ACETATE ((1S, 6R,8aR)-1 , 4,4,6- tetramethyloctahydro-1 H-5,8a-methanoazulen-6-yl acetate); CEDRYL METHYL ETHER ((1 R,6S,8aS)-6-methoxy-1 ,4,4,6-tetramethyloctahydro-1 H-5,8a-methanoazulene); CITRAL ((E)- 3,7-dimethylocta-2,6-dienal); CITRONELLOL (3,7-dimethyloct-6-en-1-ol); CITRONELLYL ACETATE (3,7-dimethyloct-6-en-1-yl acetate); COSMONE ((Z)-3-methylcyclotetradec-5-enone); CRESYL METHYL ETHER PARA (1-methoxy-4-methylbenzene); CYCLOHEXYL ETHYL ACETATE (2-cyclohexylethyl acetate); CYCLOHEXYL SALICYLATE (cyclohexyl 2- hydroxybenzoate); DAMASCENONE ((E)-1-(2,6,6-trimethylcyclohexa-1 ,3-dien-1-yl)but-2-en-1- one); DAMASCONE ALPHA ((E)-1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one); DECALACTONE GAMMA (5-hexyloxolan-2-one); DECENAL-4-TRANS ((E)-dec-4-enal); DIHYDRO MYRCENOL (2,6-dimethyloct-7-en-2-ol); DIPHENYL OXIDE (oxydibenzene); DIHYDRO ANETHOLE (1-methoxy-4-propylbenzene); DIHYDRO JASMONE (3-methyl-2- pentylcyclopent-2-enone); DIMETHYL ANTHRANILATE (methyl 2-(methylamino)benzoate); DIMETHYL BENZYL CARBINYL ACETATE (2-methyl-1-phenylpropan-2-yl acetate); DIMETHYL BENZYL CARBINYL BUTYRATE (2-methyl-1-phenylpropan-2-yl butanoate); DIMETOL (2,6- dimethylheptan-2-ol); DODECALACTONE DELTA (6-heptyltetrahydro-2H-pyran-2-one); DODECALACTONE GAMMA (5-octyloxolan-2-one); DODECENAL ((E)-dodec-2-enal); EBANOL ((E)-3-methyl-5-(2,2,3-trimethylcyclopent-3-en-1-yl)pent-4-en-2-ol); ETHYL HEXANOATE (ethyl hexanoate); ETHYL METHYL-2-BUTYRATE (ethyl 2-methyl butyrate); ETHYL MALTOL (2-ethyl- 3-hydroxy-4H-pyran-4-one); ETHYL OENANTHATE (ethyl heptanoate); ETHYL VANILLIN (3- ethoxy-4-hydroxybenzaldehyde); ETHYLENE BRASSYLATE (1 ,4-dioxacycloheptadecane-5, 17- dione); EUCALYPTOL ((1s,4s)-1 ,3,3-trimethyl-2-oxabicyclo[2.2.2]octane); EUGENOL (4-allyl-2- methoxyphenol); EVERNYL (methyl 2,4-dihydroxy-3,6-dimethylbenzoate); FIXAMBRENE (3a,6,6,9a-tetramethyldodecahydronaphtho[2,1-b]furan); FLORHYDRAL (3-(3- isopropylphenyl)butanal); FLORIDILE ((E)-undec-9-enenitrile); GALBANONE PURE (1-(5,5- dimethylcyclohex-1-en-1-yl)pent-4-en-1-one); GARDENOL (1-phenylethyl acetate); GERANIOL ((E)-3,7-dimethylocta-2,6-dien-1-ol); GERANYL ACETATE ((E)-3,7-dimethylocta-2,6-dien-1-yl acetate); HABANOLIDE ((E)-oxacyclohexadec-12-en-2-one); HEDIONE (methyl 3-oxo-2- pentylcyclopentaneacetate); HEXENAL-2-TRANS ((E)-hex-2-enal); HEXENOL-3-CIS ((Z)-hex-3- en-1-ol); HEXENYL-3-CIS ACETATE ((Z)-hex-3-en-1-yl acetate); HEXENYL-3-CIS SALICYLATE ((Z)-hex-3-en-1-yl 2-hydroxybenzoate); HEXYL ACETATE (hexyl acetate); INDOLENE (8,8-di(1 H-indol-3-yl)-2,6-dimethyloctan-2-ol); IONONE BETA ((E)-4-(2,6,6- trimethylcyclohex-1-en-1-yl)but-3-en-2-one); IRISANTHEME ((E)-3-methyl-4-(2,6,6- trimethylcyclohex-2-en-1-yl)but-3-en-2-one); IRISONE ALPHA ((E)-4-(2,6,6-trimethylcyclohex-2- en-1-yl)but-3-en-2-one); ISOAMYL ACETATE (3-methylbutyl acetate); ISOAMYL BUTYRATE (3- methylbutyl butanoate); ISOEUGENOL ((E)-2-methoxy-4-(prop-1-en-1-yl)phenol);

[0158] ISOJASMONE B 11 (2-hexylcyclopent-2-en-1-one); ISORALDEINE ((E)-3-methyl-4-(2,6,6- trimethylcyclohex-2-en-1-yl)but-3-en-2-one); JASMONYL (3-butyl-5-methyltetrahydro-2H-pyran- 4-yl acetate); LAITONE (8-isopropyl-1-oxaspiro[4.5]decan-2-one); LEMONILE ((2E,6Z)-3,7- dimethylnona-2,6-dienenitrile); LINALOOL (3,7-dimethylocta-1 ,6-dien-3-ol); LINALOOL OXIDE (2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propan-2-ol); LINALYL ACETATE (3,7-dimethylocta-1 ,6- dien-3-yl acetate); MANZANATE (ethyl 2-methylpentanoate); MAYOL ((4- isopropylcyclohexyl)methanol); MEFROSOL (3-methyl-5-phenylpentan-1-ol); MELONAL (2,6- dimethylhept-5-enal); MERCAPTO-8-METHANE-3-ONE (mercapto-para-menthan-3-one); METHYL ANTHRANILATE (methyl 2-aminobenzoate); METHYL BENZOATE (methyl benzoate); METHYL DIANTILIS (2-ethoxy-4-(methoxymethyl)phenol); METHYL HEPTENONE PURE (6- methylhept-5-en-2-one); METHYL LAITONE (8-methyl-1-oxaspiro[4.5]decan-2-one); METHYL OCTYNE CARBONATE (methyl non-2-ynoate); METHYL SALICYLATE (methyl 2- hydroxybenzoate); NECTARYL (2-(2-(4-methylcyclohex-3-en-1-yl)propyl)cyclopentanone); NEOFOLIONE ((E)-methyl non-2-enoate); NEROLEX ((2Z)-3,7-dimethylocta-2,6-dien-1-ol);

[0159] NEROLIDOL ((Z)-3,7,11-trimethyldodeca-1 ,6, 10-trien-3-ol); NEROLINE CRYSTALS (2- ethoxynaphthalene); NEROLIONE (1-(3-methylbenzofuran-2-yl)ethanone); NERYL ACETATE ((Z)-3,7-dimethylocta-2,6-dien-1-yl acetate); NONADIENAL ((2E,6Z)-nona-2,6-dienal); NONENAL-6-CIS ((Z)-non-6-enal); NONENOL-6-CIS ((Z)-non-6-en-1-ol); NYMPHEAL (3-(4-(2- methylpropyl)-2-methylphenyl)propanal); OCTALACTONE DELTA (6-propyltetrahydro-2H-pyran- 2-one); GRANGER CRYSTALS (1-(2-naphtalenyl)-ethanone); PARA TERT BUTYL CYCLOHEXYL ACETATE (4-(tert-butyl)cyclohexyl acetate); PEACH PURE (5- heptyldihydrofuran-2(3H)-one); PELARGOL (3,7-dimethyloctan-1-ol); PHENYL ETHYL ACETATE (2-phenylethyl acetate); PINENE ALPHA (2,6,6-trimethylbicyclo[3.1.1]hept-2-ene); PINENE BETA (6,6-dimethyl-2-methylenebicyclo[3.1 ,1]heptane); POMAROSE ((2E,5E)-5,6,7- trimethylocta-2,5-dien-4-one); POMELOL FF (2,4,7-Trimethyl-6-octen-1-ol); PRENYL ACETATE (3-methylbut-2-en-1-yl acetate); PRUNOLIDE (5-pentyldihydrofuran-2(3H)-one); RASPBERRY KETONE (4-(4-hydroxyphenyl)butan-2-one); ROSALVA (dec-9-en-1-ol); ROSE OXIDE CO (4- methyl-2-(2-methylprop-1-en-1-yl)tetrahydro-2H-pyran); ROSYRANE SUPER (4-methyl-2- phenyl-3,6-dihydro-2H-pyran); SAFRANAL (2,6,6-trimethylcyclohexa-1 ,3-dienecarbaldehyde); SCENTAURUS JUICY (4-(dodecylthio)-4-methylpentan-2-one); SILVIAL (2-methyl-3-[4-(2- methylpropyl)phenyl]propanal); STYRALLYL ACETATE (1 -phenylethyl acetate); SYLKOLIDE ((E)-2-((3,5-dimethylhex-3-en-2-yl)oxy)-2-methylpropyl cyclopropanecarboxylate); TERPINENE GAMMA (1-methyl-4-propan-2-ylcyclohexa-1 ,4-diene); TERPINEOL (2-(4-methylcyclohex-3-en- 1-yl)propan-2-ol); TERPINOLENE (1-methyl-4-(propan-2-ylidene)cyclohex-1-ene);

[0160] TETRAHYDRO LINALOOL (3,7-dimethyloctan-3-ol); TOSCANOL (1-(cyclopropylmethyl)-4- methoxybenzene); TRIDECENE-2-NITRILE ((E)-tridec-2-enenitrile); TRIFERNAL (3- phenylbutanal); TROPIONAL (3-(benzo[d][1 ,3]dioxol-5-yl)-2-methylpropanal); UNDECAVERTOL ((E)-4-methyldec-3-en-5-ol); YARA YARA (2-methoxynaphtalene); BOIS CEDRE ESS CHINE (cedar wood oil); EUCALYPTUS GLOBULUS ESS CHINA (eucalyptus oil); GALBANUM ESS (galbanum oil); GIROFLE FEUILLES ESS RECT MADAGASCAR (clove oil); LAVANDIN GROSSO OIL FRANCE ORPUR (lavandin oil); MANDARIN OIL WASHED COSMOS (mandarin oil); ORANGE TERPENES (orange terpenes); PATCHOULI ESS INDONESIE (patchouli oil); and YLANG ECO ESSENCE (ylang oil).

[0161] The above-mentioned ingredients have all been identified as not only being biodegradable, but also as being suitable for encapsulation with respect to their physical and chemical properties, such as lipophilicity, molecular size and reactivity towards shell materials. They therefore provide a useful selection of perfume ingredients for readily and reliably providing more sustainable fragrance encapsulates.

[0162] In one embodiment, the at least one fragrance ingredient may comprise at least one fragrance precursor, meaning a material that is capable of releasing a fragrance ingredient by the means of a stimulus, such as a change of temperature, the presence of oxidants, the action of enzymes or the action of light. Such fragrance precursors are well-known to the art. In one embodiment, the at least one fragrance ingredient is totally encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core.

[0163] In one embodiment, the at least one fragrance ingredient is partly encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core. The fragrance ingredient that is not encapsulated in core-shell microcapsules is referred to as non-encapsulated fragrance ingredient.

[0164] If present, the non-encapsulated fragrance ingredient can be identical or different from the encapsulated fragrance ingredient used in the microcapsule composition as described herein above. This results in a modulated release of the same or of different odor impressions, depending on whether the encapsulate is exposed to moisture or mechanical stresses. In particular, a sequential release of the fragrance ingredient may be envisioned.

[0165] The compositions of the present invention allow for fragrance ingredient release either through activation by mechanical action or by moisture. But such compositions are also particularly useful when employed as fragrance delivery means in consumer products that require, for delivering optimal perfumery benefits, core-shell microcapsules to adhere to a substrate on which they are applied, for instance laundry detergents.

[0166] The non-encapsulated fragrance ingredient can comprise, preferably consists of, at least one, preferably at least two, more preferably at least four, even more preferably at least eight, even still more preferably at least sixteen, biodegradable ingredient(s). The biodegradable ingredient(s) can be present at a total concentration of at least 75 wt.-%, preferably at least 80 wt.-%, more preferably at least 85 wt.-%, even more preferably at least 90 wt.-%, even still more preferably at least 95 wt.-%, relative to the total weight of the non-encapsulated fragrance ingredient. The biodegradable ingredient(s) can be selected from the groups as defined hereinabove.

[0167] Core-shell microcapsule compositions are generally provided in the form of a slurry, that is, a dispersion or suspension of microcapsules in an aqueous medium, that may contain somewhere in the order of about 60 wt.- % of water. If desired, slurries can be dried to provide microcapsule compositions in the form of a powder or cake, which generally comprises around 5 wt.-% of water. In a microcapsule composition in dry form, the proportion of the fragrance ingredient can be between about 10 to about 50 wt.-%, preferably between about 20 to about 47.5 wt.-%, even more preferably between about 30 to about 45 wt.-%, relative to the total weight of the microcapsule composition in dry form.

[0168] The proportion of the core-shell microcapsules as described hereinabove in the unit dose laundry detergent composition may be between about 1.0 wt.-% to about 10.0 wt.-%, optionally between 2.0 wt.-% to about 3.0 wt.-%, preferably between about 2.3 wt.-% to about 2.8 wt.-%, more preferably about 2.5 wt.-% on dry basis, relative to the weight of the unit dose laundry detergent composition.

[0169] In one embodiment, the shell of the microcapsules comprises a melamine-formaldehyde polymer, a polyurea or polyurethane polymer, or a hydrated polymer and a polymeric stabilizer formed by reaction of an aminosilane with a polyfunctional isocyanate, preferably wherein the shell of the microcapsules is a hydrated polymer and a polymeric stabilizer formed by reaction of an aminosilane with a polyfunctional isocyanate.

[0170] Further Additives

[0171] In addition to the surfactant, at least one film former, thickening agent, at least one plasticizer and microcapsule composition as defined hereinabove, the unit dose laundry detergent composition may comprise further additives which further improve the performance and / or aesthetic properties of the composition. Such additives may have the role of chelating agents, preservatives, film release aids, inorganic and / or organic builders, detergent additives, dyes, color-capturing compounds, color transfer inhibitors, optical brighteners, disinfectants, defoamers, pH adjusters, disintegrating agents, leavening agents or enzymes.

[0172] Suitable chelating agents may be iron and / or manganese-chelating agents selected from the group consisting of zeolites, amino carboxylates, amino phosphonates, polyfunctionally- substituted aromatic chelating agents and mixtures thereof. In one embodiment, the chelating agent is ethylenediaminetetraacetic acid (EDTA). EDTA serves to dissolve mineral scale, and as a chelating agent reducing the water hardness, and therefore increasing the effectiveness of detergents. It is able to bind and render less reactive metal ions such as Ca2+and Fe3+. After being bound by EDTA, metal ions remain in solution but exhibit diminished reactivity. The chelating agent may be present in up to 0.5 wt%, optionally about 0.2 wt% of the weight of the composition, on dry basis.

[0173] The preservatives inhibit growth of microbes and fungi. Suitable preservatives may be parabens, such as methylparaben and propylparaben, isothiazolinones, such as methyl-isothiazolinone, chloromethyl-isothiazolinone and mixtures thereof. A preferred preservative is methyl- isothiazolinone.

[0174] The preservative may be present in up to 0.1 wt%, optionally about 0.05 wt% of the weight of the composition, on dry basis.

[0175] Film release aids favor release of the sheet from the support on which the substrate has been left to dry. A suitable example of film release aids is mineral oil, such as Mineral Oil Carnation.

[0176] The film release aid may be present in up to 1.5 wt%, optionally about 1.1 wt% of the weight of the composition, on dry basis.

[0177] Examples of inorganic and / or organic builders include carbonate salts, such as sodium carbonate, sodium bicarbonate and mixtures thereof, aluminosilicate builders, such as zeolites, in particular zeolite A, zeolite X, zeolite P and zeolite MAP, bentonite, silicate salts, preferably sodium silicate.

[0178] Examples of dyes include orange dye, blue dye, green dye, purple dye, pink dye, or mixtures thereof. Preferably, the dye is water-soluble, in order not to stain the fabric.

[0179] Examples of suitable disintegrating agents include cellulose based materials, starch derivatives, clays or synthetic polymers such as cross-linked polyvinyl pyrrolidone, polyacrylates or mixtures thereof.

[0180] In one embodiment, the unit dose laundry detergent composition comprises the following ingredients, on dry basis:

[0181] 19.7 wt% Sodium C14-16 Olefin Sulfonate;

[0182] 5.0 wt% Coco Glucoside;

[0183] 1 .8 wt% Cocamidopropyl betaine;

[0184] 18.9 wt% PVOH;

[0185] 38.3 wt% Corn Starch;

[0186] 12.7 wt% Glycerin;

[0187] 1.0 wt% Mineral oil; <0.1 wt% Methyl Isothiazolinone;

[0188] 0.2 wt% EDTA;

[0189] 2.5 wt% dry core-shell microcapsules.

[0190] Water

[0191] In one embodiment, the water level in the composition is from about 6 wt% to about 9 wt%, preferably from about 7 wt% to about 8 wt%. This level of water provides the advantage that the composition shows the desired flexibility for ease of manufacturing and processing, which is then maintained during storage.

[0192] In one embodiment, when the water level in the composition is from about 6 wt% to about 9 wt%, preferably from about 7 wt% to about 8 wt% of the total composition, the unit dose laundry detergent composition may be in the form of a laundry sheet or a laundry pellet.

[0193] In one embodiment, the water level in the composition is about 7.5 wt%.

[0194] Method

[0195] In one aspect, the invention provides a method for preparing a unit dose laundry detergent composition. The laundry detergent composition of the present invention may be prepared by a method comprising the steps of: i) mixing at least one film former, optionally as an aqueous solution; at least one plasticizer, optionally as an aqueous solution; a surfactant, optionally as an aqueous solution; ii) adding to the solution obtained in step i) a thickening agent in small increments, under continuous stirring; iii) optionally adding to the mixture obtained in step ii) further additives, optionally as aqueous solutions; iv) adding to the mixture obtained in step iii) a microcapsule composition comprising a polymer encapsulating at least a fragrance ingredient, wherein the at least fragrance ingredient is encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core; v) optionally, drying the mixture obtained in step iv), wherein the drying step is carried out at a temperature between about 25 °C to about 150 °C. The at least one film former, at least one plasticizer, surfactant, thickening agent, further additives and microcapsule composition are as described hereinabove.

[0196] Once the surfactant, generally provided as an aqueous solution, the water-soluble substrate, also in the form of an aqueous solution and the microcapsule composition in the form of a slurry, as described hereinabove are mixed together in suitable proportions, the resulting homogeneous liquid may be poured onto a drying plate or into a drying container. Over a certain period of time such as between 4 to 12 hours optionally about 8 hours, water is allowed to evaporate from the liquid, for example at a temperature of about 25 °C. When the water level reaches a level of below about 9 wt%, the resulting products is a non-brittle, flexible solid in the form of a sheet or a pellet. In one embodiment, the water level is about 7.5 wt%.

[0197] Optionally, the composition may be subsequently subjected to further drying, such as at a temperature of up to about 150 °C.

[0198] Use

[0199] In one aspect, the use of the composition as described hereinabove to improve the perception or enhance the performance of the laundry detergent is provided.

[0200] The present invention is further illustrated by means of the following non-limiting examples:

[0201] Example 1 : Preparation of a unit dose laundry detergent composition base

[0202] In a beaker, it is added, under stirring using an overhead four prong mixing blade the following ingredients in the following order:

[0203] 1) PVOH as a 21.3% solution (Selvol 21-205, from Sekisui);

[0204] 2) Glycerin 99.5% (from Givaudan);

[0205] 3) Sodium C14-16 Olefin Sulfonate as a 40% solution (Bio Terge AS-40 from Stepan);

[0206] 4) Coco Glucoside as a 51% solution (Plantaren 818 UP from BASF);

[0207] 5) Cocamidopropyl betaine as a 30% solution (Lexaine CMB from Index);

[0208] 6) Corn Starch (100%, Purity 21 C Pure from Nouryon) is added as a solid under stirring, in small increments, until the mixture is fully homogenous. Indication of full homogenization is a smooth opaque product.

[0209] 7) Mineral oil (100%, Mineral Oil Carnation from Givaudan);

[0210] 8) Methyl Isothiazolinone as a 9.7% solution (NeoIone M-10 from Dow); 9) EDTA as a 39% solution (Versene 100 from Dow).

[0211] High shear mixing is avoided due to potential formation of air bubbles.

[0212] Composition bases were prepared by varying the relative amounts of water-soluble substrate, i.e. the film former, the thickening agent and the plasticizer, as shown in Table 1 : Table 1 : Laundry detergent composition base before drying

[0213] *comparative

[0214] In order to evaluate the firmness of the laundry sheets resulting after water evaporates from these compositions, non-encapsulated fragrance oil was added at a 12 wt% level (on dry basis) in all compositions. The resulting mixture was poured on a Teflon drying sheet and spread out evenly with a casting knife, resulting in a layer of rectangular shape. Water was allowed to evaporate from the composition at about 25 °C for about 8 h. The texture of the resulting materials was evaluated.

[0215] Relatively high amounts of glycerin, such as in composition 1.1 and 1.2, led to sticky / tacky laundry sheets, with no firmness.

[0216] Composition 1 .6, comprising a relatively low level of glycerin but a relatively large amount of corn starch, resulted in a hard sponge-like sheet, with no flexibility.

[0217] The only compositions that produced flexible, dry and yet firm laundry detergent sheets were 1.3 and 1 .4. The subsequent experiments were carried out using composition 1 .3 as the base for the unit dose laundry detergent composition.

[0218] The pH of base composition 1.3 was measured as 7.79. The viscosity was measured as 10.290 cps RVT # 4, 20 rpm @ RT using a Brookfield Ametek DV2T Model # DV2TRVMJO apparatus.

[0219] Example 2: Preparation of a unit dose laundry detergent composition

[0220] 3 g of microcapsule slurry prepared according to T able 2 is added to 100 g of the laundry detergent composition base prepared as in Example 1.3, under stirring. High shear mixing was avoided due to potential formation of air bubbles. The following microcapsules were employed as described in Table 2.

[0221] Table 2: Microcapsules and methods of preparation A Laundry sheets

[0222] 30 g of the resulting mixture is poured on a Teflon drying sheet and spread out evenly with a casting knife, resulting in a layer of rectangular shape. Water is allowed to evaporate from the composition at about 25 °C for about 8 h, resulting in about 13.5 g of dry composition. The dry sheet is gently peeled away from the Teflon sheet. The sheet is divided and cut in four identical sheets, each sheet weighing around 3 g / sheet, having a thickness of about 0.65 mm, length of about 10 cm and width of about 9 cm.

[0223] B. Laundry pellets

[0224] The resulting mixture was deposited as drops on a Teflon drying sheet. Water is allowed to evaporate from the drops at about 25 °C for about 8 h, resulting in dry pellets. The dry pellets are gently peeled away from the Teflon sheet. Each dry pellet weighs about 0.1 g.

[0225] Example 3: Olfactive evaluation

[0226] The resulting unit dose laundry detergent compositions were tested on laundry as follows.

[0227] I. One sheet of about 3 g, as prepared in Example 2A or 2.6 g of pellets as prepared in Example 2B was placed in the washer under running water and was allowed to disperse for about 1-2 min before adding towels in the drum. The washing process was carried out in the conditions as below:

[0228] - Medium load of 20 small towels

[0229] - Warm wash

[0230] - Cold Rinse

[0231] - 45 min tumble dryer

[0232] The olfactive evaluation was carried out as follows:

[0233] 1 towel for each Panelist was evaluated; n = number of panelists The towels were evaluated using the Intensity Scale shown below Each towel was evaluated pre-rub and then rubbed 3 x and evaluated post-rub The measurements were taken immediately after the wash+dry. II. Monitoring over time and temperature:

[0234] Samples of unit dose laundry detergent compositions comprising microcapsules were stored at 40°C for 2 weeks;

[0235] Machine Dried towels were obtained as in step I after using the stored unit dose laundry detergent compositions.

[0236] The evaluation was carried out as described in step I.

[0237] Intensity scale: 0 - No Fragrance; 1 - Very weak; 2 - Weak; 3 - Fairly weak; 4 - Relatively weak; 5 - Moderate; 6 - Relatively strong; 7 - Fairly strong; 8 - Strong; 9 - Very strong; 10 - Extremely strong. The results of these evaluations are shown in Table 3.

[0238] Table 3: Pre-rub and post-rub values recorded on towels washed using the unit dose laundry detergent compositions according to the invention All samples showed very good performance, especially post-rub performance. Samples 2.3 and 2.4 appeared to be particularly well-performing in both laundry sheets and laundry pellets.

[0239] Overall, sample 2.4 appeared to perform the best, showing an outstanding post-rub performance after being stored for 2 weeks at 40°C, in both sheet and pellet form. Example 4: Effect of drying conditions on the performance of unit dose laundry detergent composition

[0240] The sheets employing microcapsules 2.4 prepared as in Example 2A were allowed to dry further at about 25 °C for a total of about 24 h. For comparison, sheets employing microcapsules 2.4 prepared as in Example 2A were dried at 150°C for 10 minutes. The olfactive performance of the resulting compositions is shown in Table 4.

[0241] Table 4: Pre-rub and post-rub values recorded on towels washed using the unit dose laundry detergent compositions using microcapsules 2.4 according to the invention, that underwent further drying (n = 12) It can be observed that drying the sheet at elevated temperature led to an increase in the product performance, providing outstanding post-rub performance.

Claims

Claims1. A unit dose laundry detergent composition comprising a) a surfactant; b) a water-soluble substrate comprising:- at least one film former;- a thickening agent;- at least one plasticizer; wherein the weight ratio between the at least one film former and thickening agent to the at least one plasticizer is between about 3.5:1 to about 5.5:1 , preferably about 4.5:1 , on dry basis; and c) a microcapsule composition comprising a polymer encapsulating at least a fragrance ingredient, wherein the at least fragrance ingredient is encapsulated in core-shell microcapsules 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 thickening agent to the at least one film former is between about 2.5: 1 to about 1.5:1 , preferably about 2.0:1 , on dry basis.

3. The composition according to claim 1 or claim 2, wherein the surfactant is selected from the group consisting of an anionic surfactant, a non-ionic surfactant, a zwitterionic surfactant, or a combination thereof.

4. The composition according to any one of the preceding claims, wherein the at least one film former is selected from the group consisting of polyalkylene glycols, polyvinyl alcohols, polyacrylates, polymethacrylates, polyacrylamides, polyvinylpyrrolidones, and proteins / polypeptides or hydrolyzed products thereof, preferably wherein the at least one film former is polyvinyl alcohol.

5. The composition according to any one of the preceding claims, wherein the thickening agent is selected from the group consisting of starch, modified starch, cellulose or combinations thereof, preferably wherein the thickening agent is starch.

6. The composition according to any one of the preceding claims, wherein the at least one plasticizer is selected from the group consisting of pentaerythritols, sorbitol, mannitol and glycols, preferably wherein the plasticizer is glycerin.

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

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

9. The composition according to any one of the preceding claims, wherein the film former is present from about 16 wt% to about 23 wt%, preferably from about 18 wt% to about 22 wt%, such as about 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5 wt %, most preferably about 19.0 wt% of the weight of the composition, on dry basis.

10. The composition according to any one of the preceding claims, wherein the thickening agent is present from about 35 wt% to about 42 wt%, preferably from about 37 wt% to about 40 wt%, such as about 37.5, 38.0, 38.5, 39.0, 39.5 wt %, most preferably about 38.5 wt% of the weight of the composition, on dry basis.11 . The composition according to any one of the preceding claims, wherein the plasticizer is present from about 8.0 wt% to about 15.0 wt%, preferably from about 10.0 wt% to about 13.0 wt%, such as about 10.5, 11.0, 11.5, 12.0, 12.5 wt% of the weight of the composition, preferably about 12.5 wt% on dry basis.

12. The composition according to any one of the preceding claims, wherein the core-shell microcapsules are present from about 1.0 wt.-% to about 10.0 wt.-%, optionally between 2.0 wt%to about 3.0 wt%, preferably from about 2.3 wt% to about 2.8 wt%, more preferably about 2.5 wt% of the weight of the composition, on dry basis.

13. The composition according to any one of the preceding claims, further comprising at least one non-encapsulated fragrance ingredient, optionally wherein the non-encapsulated fragrance ingredient is present from about 0.5 wt.-% to about 12 wt.-%, optionally between 5 wt% to about 7 wt%, preferably about 6 wt% of the weight of the composition, on dry basis.

14. The composition according to any one of the preceding claims, further comprising one or more additives selected from the group consisting of chelating agents, preservatives, film release aids, inorganic and / or organic builders, detergent additives, dyes, color-capturing compounds, color transfer inhibitors, optical brighteners, disinfectants, defoamers, pH adjusters or leavening agents.

15. The composition according to any one of the preceding claims, comprising water from about 6 wt% to about 9 wt%, preferably from about 7 wt% to about 8 wt%, such as about 7.5 wt% of the composition.

16. The composition according to claim 15, which is provided in the form of laundry sheets or laundry pellets.

17. A method of preparing a composition according to any one of claims 1 to 16, comprising the steps of: i) mixing at least one film former, optionally as an aqueous solution; at least one plasticizer, optionally as an aqueous solution; a surfactant, optionally as an aqueous solution; ii) adding to the solution obtained in step i) a thickening agent in small increments, under continuous stirring; iii) optionally adding to the mixture obtained in step ii) further additives, optionally as aqueous solutions; iv) adding to the mixture obtained in step iii) a microcapsule composition comprising a polymer encapsulating at least a fragrance ingredient, wherein the at least fragrance ingredient is encapsulated in core-shell microcapsules comprising a core and a shell surrounding the core;v) optionally, drying the mixture obtained in step iv), wherein the drying step is carried out at a temperature in a range between about 25 °C to about 150 °C.

18. Use of the composition according to any one of claims 1 to 16 to improve the perception or enhance the performance of the laundry detergent.

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