Improvements in or related to organic compounds

Abstract

An encapsulated composition is disclosed that includes a plurality of core-shell microcapsules. The core-shell microcapsules include a core and a shell surrounding the core. The core includes a fragrance composition that includes at least one biodegradable ingredient(s). The biodegradable ingredient(s) are present in a combined concentration of at least 75 wt.-% based on the total weight of the fragrance composition.

Description

[Technical Field]

[0001] The present invention relates to an encapsulated composition comprising a plurality of core-shell microcapsules, and to the use of such encapsulated composition to obtain consumer products. [Background technology]

[0002] The incorporation of functional materials into consumer products such as home care, personal care, and fabric care products is well known. Functional materials include, for example, fragrances, cosmetic surfactants, and biologically active ingredients such as biocides and drugs.

[0003] A particularly suitable microcapsule for the delivery of such functional materials is a core-shell microcapsule, where the core contains the functional material and the shell is impermeable or partially impermeable to the functional material. Typically, these microcapsules are used in aqueous media, and the encapsulated functional material is hydrophobic. A wide range of shell materials can be used, provided the shell material is impermeable or partially impermeable to the encapsulated functional material.

[0004] Among functional materials, fragrances are used for various reasons. capsule Microcapsules can separate and protect fragrances from external suspension media, such as consumer product bases, where the fragrance is unsuitable or unstable. They are also used to help deposit fragrances onto substrates such as skin, hair, fabrics, or hard household surfaces. They can also function as a means of controlling the spatiotemporal release of fragrances.

[0005] Thermosetting resins are common encapsulation materials for encapsulating functional materials, particularly volatile functional materials such as fragrance components. Core-shell microcapsules formed from aminoplast resins, polyurea resins, polyurethane resins, polyacrylate resins, and combinations thereof generally offer considerable resistance to fragrance leakage, even in surfactant-containing media, when dispersed in aqueous suspension media. When incorporated into consumer products such as laundry detergents or conditioners, they provide fragrance benefits that cannot be achieved when fragrances are directly incorporated into those products.

[0006] Furthermore, given the growing consumer awareness of environmental and resource conservation, core-shell microcapsules based on bioresource materials have been developed in recent years. Such capsules have a lower ecological footprint, enable highly efficient encapsulation of functional materials, and exhibit the required release properties.

[0007] However, despite these advancements, the need remains for core-shell fragrance microcapsules that demonstrate improved overall sustainability. [Overview of the project]

[0008] This problem is resolved by the matters of the independent claims.

[0009] The present invention relates to an encapsulated composition comprising a plurality of core-shell microcapsules. The core-shell microcapsule comprises a core and a shell surrounding the core. The core comprises, preferably comprising, a fragrance composition comprising, at least 1, preferably at least 2, more preferably at least 4, even more preferably at least 8, even more preferably at least 16, even more preferably at least 32, and even more preferably at least 64 biodegradable components (one or more). The biodegradable components (one or more) are 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.-%, and even more preferably at least 95 wt.-%, based on the total weight of the fragrance composition.

[0010] In the context of this invention, “biodegradable component” is a component that meets the “inherently biodegradable” and / or “readily biodegradable” pass criteria in at least one OECD biodegradability test. To avoid ambiguity, this means that if a component passes one test but fails one or more other tests, the pass result takes precedence over the results of the other tests.

[0011] "Ultimate biodegradability" refers to the complete breakdown of a chemical into water, carbon dioxide, and new biomass.

[0012] For assessing the "easily biodegradable" criteria, biodegradation studies can be selected from the group consisting of OECD Method 301C, OECD Method 301D, OECD Method 301F, and OECD Method 310. These methods are suitable for volatile materials.

[0013] OECD Method 301C, OECD Method 301D, and OECD Method 301F are described in the OECD Guidelines for the Testing of Chemicals, Section 3, Test No. 301: Ready Biodegradability (adopted July 17, 1992; https: / / doi.org / 10.1787 / 9789264070349-en).

[0014] OECD Method 310 is described in the OECD Guidelines for the Testing of Chemicals, Section 3, Test No. 310: Ready Biodegradability - CO2 in sealed vessels (Headspace Test) (Adopted: March 23, 2006; Amended: September 26, 2014; https: / / doi.org / 10.1787 / 9789264016316-en).

[0015] In a specific aspect of the present invention, the pass criterion for "easily biodegradable" is evaluated according to OECD Method 301F, which refers to manometric respirometry. In this method, the pass level for "easily biodegradable" is reaching 60% of the theoretical oxygen demand and / or chemical oxygen demand. This pass value must be achieved within 10 days of a 28-day test period. The 10-day period begins when the degree of biodegradation reaches 10% of the theoretical oxygen demand and / or chemical oxygen demand and must be completed by the 28th day of the test.

[0016] If positive results are obtained in the biodegradability test, the chemical substance is assumed to undergo rapid and ultimate biodegradation in the environment (Introduction to the OECD Guidelines for the Testing of Chemicals, Section 3, Part 1: Principles and Strategies Related to the Testing of Degradation of Organic Chemicals; adopted: July 2003).

[0017] For the assessment of the pass criteria for "inherent biodegradability", the biodegradation study can be OECD Method 302C, but it is also possible to use OECD Method 301F, although with different pass criteria. These methods are also suitable for volatile materials.

[0018] OECD Method 302C is described in OECD Guidelines for the Testing of Chemicals, Section 3, Test No. 302C: Inherent Biodegradability: Modified MITI Test (II) (adopted: May 12, 1981; amended: September 8, 2009; https: / / doi.org / 10.1787 / 9789264070400-en).

[0019] In a specific aspect of the specific invention, the pass criteria for "inherent biodegradability" are evaluated by OECD Method 302C. In this method, the pass level for "inherent biodegradability" is then to reach 70% of the theoretical oxygen demand. There is no time limit for reaching this level. A biodegradation rate above 70% is essential and can be considered as evidence of ultimate biodegradability (OECD Guidelines for the Testing of Chemicals, Section 3, Part 1: Principles and Strategies Related to the Testing of Degradation of Organic Chemicals; Adopted: July 2003).

[0020] When OECD Method 301F is used to assess the pass criteria for "inherent biodegradability", the pass level is 60% of the theoretical oxygen demand and / or chemical oxygen demand. This pass value can be reached after a 28-day test period (usually extended up to 60 days), and the 10-day framework does not apply.

[0021] In this context, when the component is an essential oil, if all of its constitutive substances present at a level of ≧ 1 wt.-% meet the definition of "inherent biodegradability" and / or "readily biodegradable" as defined herein, it is considered a "biodegradable component". However, essential oils can also be the subject of the above biodegradation tests.

[0022] Fragrance core-shell microcapsules typically have a core-to-shell weight ratio of 6:4 or more, meaning that the overwhelming majority of the capsule mass consists of the core material. As a result, the overall ecological footprint of the capsules can be advantageously improved - regardless of the shell material - by using biodegradable component(s) as the core material. Biodegradation is an important process for the removal of fragrance components in the environment.

[0023] In specific embodiments of the present invention, the biodegradable component(s) are selected from the group consisting of: ACETYL ISOEUGENOL ((E)-2-methoxy-4-(propa-1-en-1-yl)phenyl acetate); ADOXAL (2,6,10-trimethylundeca-9-enal); AGRUMEX (2-(tert-butyl)cyclohexyl acetate); ALDEHYDE C 10 DECYLIC (decanal); ALDEHYDE C 11 UNDECYLENIC (undeca-10-enal); ALDEHYDE C 110 UNDECYLIC (undecal); ALDEHYDE C 12 LAURIC (dodecanal); ALDEHYDE C 12 MNA (2-methylundecal); ALDEHYDE C 8 OCTYLIC (octanal); CYCLAMEN ALDEHYDE EXTRA(3-(4-isopropylphenyl)-2-methylpropanal); ALDEHYDE ISO C 11((E)-undeca-9-enal); ALLYL AMYL GLYCOLATE(propa-2-enyl 2-(3-methylbutoxy)acetate); ALLYL CYCLOHEXYL PROPIONATE(propa-2-enyl 3-cyclohexylpropanoate); ALLYL OENANTHATE(propa-2-enylheptanoate); AMBRETTOLIDE((Z)-oxacycloheptadeca-10-en-2-one); AMBROFIX((3aR,5aS,9aS,9bR)-3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1H-benzo[e][1]benzofuran); AMYL SALICYLATE (pentyl 2-hydroxybenzoate); AUBEPINE PARA CRESOL (4-methoxybenzaldehyde);

[0024] BENZYL ACETATE; BENZYL SALICYLATE; BORNYL ACETATE ((2S,4S)-1,7,7-trimethylbicyclo[2.2.1]heptane-2-yl acetate); CARVACROL (5-isopropyl-2-methylphenol); CEDRENE ((1S,8aR)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methanoazulene); CEDRYL ACETATE ((1S,6R,8aR)-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene-6-yl acetate); CEDRYL METHYL ETHER((1R,6S,8aS)-6-methoxy-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene); CITRAL((E)-3,7-dimethylocta-2,6-dienal); CITRONELLOL(3,7-dimethylocta-6-en-1-ol); CITRONELLYL ACETATE(3,7-dimethylocta-6-en-1-yl acetate); COSMONE((Z)-3-methylcyclotetradeca-5-enone); CRESYL METHYL ETHER PARA(1-methoxy-4-methylbenzene); CYCLOHEXYL ETHYL ACETATE(2-cyclohexylethyl acetate); CYCLOHEXYL SALICYLATE(cyclohexyl 2-hydroxybenzoate);

[0025] DAMASCENONE ((E)-1-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)buta-2-en-1-one); DAMASCONE ALPHA ((E)-1-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-2-en-1-one); DECALACTONE GAMMA (5-hexyloxolan-2-one); DECENAL-4-TRANS ((E)-deca-4-enal); DIHYDRO MYRCENOL (2,6-dimethylocta-7-en-2-ol); DIPHENYL OXIDE (oxydibenzene); DIHYDRO ANETHOLE (1-methoxy-4-propylbenzene); DIHYDRO JASMONE (3-methyl-2-pentylcyclopenta-2-enone); DIMETHYL ANTHRANILATE (methyl-2-(methylamino)benzoate); DIMETHYL BENZYL CARBINYL ACETATE (2-methyl-1-phenylpropane-2-yl acetate); DIMETHYL BENZYL CARBINYL BUTYRATE (2-methyl-1-phenylpropane-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)-dodeca-2-enal);

[0026] EBANOL((E)-3-methyl-5-(2,2,3-trimethylcyclopenta-3-en-1-yl)penta-4-en-2-ol); ETHYL HEXANOATE; ETHYL METHYL-2-BUTYRATE; ETHYL MALTOL(2-ethyl-3-hydroxy-4H-pyran-4-one); ETHYL OENANTHATE; 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)-undeca-9-ennitrile);

[0027] GALBANONE PURE (1-(5,5-dimethylcyclohexa-1-en-1-yl)penta-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)-oxacyclohexadeca-12-en-2-one); HEDIONE (methyl 3-oxo-2-pentylcyclopentane acetate); HEXENAL-2-TRANS ((E)-hexa-2-enal); HEXENOL-3-CIS ((Z)-hexa-3-en-1-ol); HEXENYL-3-CIS ACETATE ((Z)-Hexa-3-en-1-ylacetate); HEXENYL-3-CIS SALICYLATE ((Z)-Hexa-3-en-1-yl2-hydroxybenzoate); HEXYL ACETATE (Hexyl acetate);

[0028] INDOLENE (8,8-di(1H-indole-3-yl)-2,6-dimethyloctan-2-ol); IONONE BETA ((E)-4-(2,6,6-trimethylcyclohexa-1-en-1-yl)buta-3-en-2-one); IRISANTHEME ((E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one); IRISONE ALPHA ((E)-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one); ISOAMYL ACETATE (3-methylbutyl acetate); ISOAMYL BUTYRATE (3-methylbutyl butanoate); ISOEUGENOL ((E)-2-methoxy-4-(propa-1-en-1-yl)phenol); ISOJASMONE B 11(2-hexylcyclopenta-2-en-1-one); ISORALDEINE((E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one);

[0029] JASMONYL (3-butyl-5-methyltetrahydro-2H-pyran-4-yl acetate); LAITONE (8-isopropyl-1-oxaspiro[4.5]decane-2-one); LEMONILE ((2E,6Z)-3,7-dimethylnonano-2,6-diennitrile); LINALOOL (3,7-dimethylocta-1,6-dien-3-ol); LINALOOL OXIDE (2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propane-2-ol); LINALYL ACETATE (3,7-dimethylocta-1,6-diene-3-ylacetate); MANZANATE (ethyl 2-methylpentanoate); MAYOL ((4-isopropylcyclohexyl)methanol); MEFROSOL (3-methyl-5-phenylpentan-1-ol); MELONAL (2,6-dimethylhepta-5-enal); MERCAPTO-8-METHANE-3-ONE (mercapto-para-menthane-3-one); METHYL ANTHRANILATE (methyl 2-aminobenzoate); METHYL BENZOATE (methylbenzoate); METHYL DIANTILIS (2-ethoxy-4-(methoxymethyl)phenol); METHYL HEPTENONE PURE (6-methylhepta-5-en-2-one); METHYL LAITONE (8-methyl-1-oxaspiro[4.5]decane-2-one); METHYL OCTYNE CARBONATE (methylnona-2-inoate); METHYL SALICYLATE (methyl-2-hydroxybenzoate);

[0030] NECTARYL (2-(2-(4-methylcyclohexa-3-en-1-yl)propyl)cyclopentanone); NEOFOLIONE ((E)-methylnona-2-enoate); NEROLEX ((2Z)-3,7-dimethylocta-2,6-dien-1-ol); 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-ylacetate); NONADIENAL((2E,6Z)-nona-2,6-dienal); NONENAL-6-CIS((Z)-nona-6-enal); NONENOL-6-CIS((Z)-nona-6-en-1-ol); NYMPHEAL(3-(4-(2-methylpropyl)-2-methylphenyl)propanal);

[0031] OCTALACTONE DELTA (6-propyltetrahydro-2H-pyran-2-one); ORANGER CRYSTALS (1-(2-naphthalenyl)-etanone); 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]hepta-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-methylbuta-2-en-1-yl acetate); PRUNOLIDE (5-pentyldihydrofuran-2(3H)-one);

[0032] RASPBERRY KETONE (4-(4-hydroxyphenyl)butan-2-one); ROSALVA (deca-9-en-1-ol); ROSE OXIDE CO (4-methyl-2-(2-methylpropa-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-diencarbaldehyde); 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-dimethylhexa-3-en-2-yl)oxy)-2-methylpropylcyclopropanecarboxylate);

[0033] TERPINENE GAMMA (1-methyl-4-propane-2-ylcyclohexa-1,4-diene); TERPINEOL (2-(4-methylcyclohexa-3-en-1-yl)propane-2-ol); TERPINOLENE (1-methyl-4-(propane-2-ylidene)cyclohexa-1-ene); TETRAHYDRO LINALOOL (3,7-dimethyloctan-3-ol); TOSCANOL (1-(cyclopropylmethyl)-4-methoxybenzene); TRIDECENE-2-NITRILE ((E)-trideca-2-ennitrile); TRIFERNAL (3-phenylbutanal); TROPIONAL (3-(benzo[d][1,3]dioxol-5-yl)-2-methylpropanal); UNDECAVERTOL ((E)-4-methyldeca-3-en-5-ol); YARA YARA (2-methoxynaphthalene); BOIS CEDRE Cedarwood oil; Eucalyptus oil; Galbanum oil; Clove oil; Lavandin oil; Mandarin oil washed cosmos; Orange terpenes; Patchouli oil; and Ylang oil.

[0034] All of the above-mentioned components not only meet at least one of the aforementioned biodegradability criteria, but have also been identified as suitable for encapsulation in terms of their physical and chemical properties, such as lipophilicity, molecular size, and reactivity to shell materials. Therefore, they provide a useful selection of fragrance components for easily and reliably providing more sustainable fragrance encapsulation.

[0035] In the encapsulated composition according to the present invention, each of the biodegradable components (one or more) is preferably present at a concentration equal to or less than the following maximum concentration:

[0036] (E)-2-Methoxy-4-(propa-1-en-1-yl)phenylacetate: 0.1 wt.-% 2,6,10-Trimethylundeca-9-enal: 1 wt.-% 2-(tert-butyl)cyclohexyl acetate: 50 wt.-% Decand: 10 wt.-% Undeca-10-Enal: 2 wt.-% Undecanal: 5 wt.-% Dodecanal: 10 wt.-% 2-Methylundecanal: 50 wt.-% Octanal: 5 wt.-% 3-(4-isopropylphenyl)-2-methylpropanal: 5 wt.-% (E)-Undeca-9-Enal: 5 wt.-% Propa-2-enyl 2-(3-methylbutoxy)acetate: 5 wt.-% Propa-2-enyl-3-cyclohexylpropanoate: 10 wt.-% Propa-2-enylheptanoate: 10 wt.-% (Z)-Oxacycloheptadeca-10-en-2-one: 2 wt.-% (3aR,5aS,9aS,9bR)-3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1H-benzo[e][1]benzofuran: 2wt.-% Pentyl 2-hydroxybenzoate: 50 wt.-% 4-Methoxybenzaldehyde: 5 wt.-%

[0037] Benzyl acetate: 10 wt.-% Benzyl 2-hydroxybenzoate: 75 wt.-% (2S,4S)-1,7,7-trimethylbicyclo[2.2.1]heptane-2-yl acetate: 50 wt.-% 5-Isopropyl-2-methylphenol: 1 wt.-% (1S,8aR)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methanoazulene: 5 wt.-% (1S,6R,8aR)-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene-6-ylacetate: 5 wt.-% (1R,6S,8aS)-6-methoxy-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene: 5 wt.-% (E)-3,7-dimethylocta-2,6-dienal: 10 wt.-% 3,7-Dimethylocta-6-en-1-ol: 25 wt.-% 3,7-Dimethylocta-6-en-1-ylacetate: 25 wt.-% (Z)-3-methylcyclotetradeca-5-enone: 5 wt.-% 1-Methoxy-4-methylbenzene: 1 wt.-% 2-Cyclohexylethyl acetate: 25 wt.-% Cyclohexyl 2-hydroxybenzoate: 15 wt.-%

[0038] (E)-1-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)buta-2-en-1-one: 2.5 wt.-% (E)-1-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-2-en-1-one: 5 wt.-% 5-Hexyloxollan-2-one: 15 wt.-% (E)-Deca-4-Enal: 1 wt.-% 2,6-Dimethylocta-7-en-2-ol: 50 wt.-% Oxydibenzene: 15 wt.-% 1-Methoxy-4-propylbenzene: 2 wt.-% 3-Methyl-2-pentylcyclopenta-2-enone: 5 wt.-% Methyl 2-(methylamino)benzoate: 1 wt.-% 2-Methyl-1-phenylpropane-2-yl acetate: 75 wt.-% 2-Methyl-1-phenylpropane-2-ylbutanoate: 50 wt.-% 2,6-Dimethylheptan-2-ol: 5 wt.-% 6-Heptyltetrahydro-2H-pyran-2-one: 5 wt.-% 5-Octyloxollan-2-one: 10 wt.-% (E)-Dodeca-2-Enal: 0.5 wt.-%

[0039] (E)-3-methyl-5-(2,2,3-trimethylcyclopenta-3-en-1-yl)penta-4-en-2-ol: 5 wt.-% Ethylhexanoate: 10 wt.-% Ethyl 2-methylbutyrate: 15 wt.-% 2-Ethyl-3-hydroxy-4H-pyran-4-one: 10 wt.-% Ethylheptanoate: 5 wt.-% 3-Ethoxy-4-hydroxybenzaldehyde: 10 wt.-% 1,4-Dioxacycloheptadecane-5,17-dione: 25 wt.-% (1s,4s)-1,3,3-trimethyl-2-oxabicyclo[2.2.2]octane: 25 wt.-% 4-Allyl-2-methoxyphenol: 5 wt.-% Methyl 2,4-dihydroxy-3,6-dimethylbenzoate: 2 wt.-% 3a,6,6,9a-Tetramethyldodecahynaphtho[2,1-b]furan: 2 wt.-% 3-(3-isopropylphenyl)butanal: 5 wt.-% (E)-Undeca-9-ennitrile: 1 wt.-%

[0040] 1-(5,5-dimethylcyclohexa-1-en-1-yl)penta-4-en-1-one: 5 wt.-% 1-Phenylethyl acetate: 5 wt.-% (E)-3,7-dimethylocta-2,6-dien-1-ol: 25 wt.-% (E)-3,7-dimethylocta-2,6-diene-1-yl acetate: 15 wt.-% (E)-Oxacyclohexadeca-12-en-2-one: 15 wt.-% Methyl 3-oxo-2-pentylcyclopentane acetate: 75 wt.-% (E)-Hexa-2-Enal: 1 wt.-% (Z)-Hexa-3-en-1-ol: 15 wt.-% (Z)-Hexa-3-en-1-ylacetate: 15 wt.-% (Z)-Hexa-3-en-1-yl-2-hydroxybenzoate: 15 wt.-% Hexyl acetate: 15 wt.-%

[0041] 8,8-di(1H-indole-3-yl)-2,6-dimethyloctan-2-ol: 2 wt.-% (E)-4-(2,6,6-trimethylcyclohexa-1-en-1-yl)buta-3-en-2-one: 25 wt.-% (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one: 5 wt.-% (E)-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one: 25 wt.-% 3-Methylbutyl acetate: 5 wt.-% 3-Methylbutylbutanoate: 1 wt.-% (E)-2-Methoxy-4-(propa-1-en-1-yl)phenol: 1 wt.-% 2-Hexylcyclopenta-2-en-1-one: 5 wt.-% (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one: 50 wt.-%

[0042] 3-Butyl-5-methyltetrahydro-2H-pyran-4-yl acetate: 15 wt.-% 8-Isopropyl-1-oxaspiro[4.5]decane-2-one: 1 wt.-% (2E,6Z)-3,7-dimethylnona-2,6-diennitrile: 25 wt.-% 3,7-Dimethylocta-1,6-dien-3-ol: 25 wt.-% 2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propan-2-ol: 1 wt.-% 3,7-Dimethylocta-1,6-diene-3-yl acetate: 25 wt.-% Ethyl 2-methylpentanoate: 10 wt.-% (4-Isopropylcyclohexyl)methanol: 5 wt.-% 3-Methyl-5-phenylpentan-1-ol: 10 wt.-% 2,6-Dimethylhepta-5-enal: 2 wt.-% Mercapto-para-menthane-3-one: 1 wt.-% Methyl 2-aminobenzoate: 2 wt.-% Methylbenzoate: 1 wt.-% 2-Ethoxy-4-(methoxymethyl)phenol: 1 wt.-% 6-Methylhepta-5-en-2-one: 5 wt.-% 8-Methyl-1-oxaspiro[4.5]decane-2-one: 2 wt.-% Methylnonano-2-inoate: 1 wt.-% Methyl 2-hydroxybenzoate: 1 wt.-%

[0043] 2-(2-(4-methylcyclohexa-3-en-1-yl)propyl)cyclopentanone: 50 wt.-% (E)-methylnona-2-enoate: 2 wt.-% (2Z)-3,7-dimethylocta-2,6-dien-1-ol: 10 wt.-% (Z)-3,7,11-trimethyldodeca-1,6,10-trien-3-ol: 5 wt.-% 2-Ethoxynaphthalene: 10 wt.-% 1-(3-methylbenzofuran-2-yl)ethanone: 5 wt.-% (Z)-3,7-dimethylocta-2,6-diene-1-yl acetate: 5 wt.-% (2E,6Z)-nona-2,6-dienal: 0.5wt.-% (Z)-Nona-6-Enal: 0.5 wt.-% (Z)-non-6-en-1-ol: 0.5 wt.-% 3-(4-(2-methylpropyl)-2-methylphenyl)propanal: 25 wt.-%

[0044] 6-Propyltetrahydro-2H-pyran-2-one: 1 wt.-% 1-(2-naphthalenyl)-ethanone: 10 wt.-% 4-(tert-butyl)cyclohexyl acetate: 50 wt.-% 5-Heptyldihydrofuran-2(3H)-one: 25 wt.-% 3,7-Dimethyloctan-1-ol: 10 wt.-% 2-Phenylethyl acetate: 15 wt.-% 2,6,6-Trimethylbicyclo[3.1.1]hepta-2-ene: 2 wt.-% 6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane: 2 wt.-% (2E,5E)-5,6,7-trimethylocta-2,5-dien-4-one: 2 wt.-% 2,4,7-trimethyl-6-octen-1-ol: 2 wt.-% 3-Methylbuta-2-en-1-yl acetate: 10 wt.-% 5-Pentyldihydrofuran-2(3H)-one: 5 wt.-%

[0045] 4-(4-hydroxyphenyl)butan-2-one: 5 wt.-% Deca-9-en-1-all: 2 wt.-% 4-Methyl-2-(2-methylpropa-1-en-1-yl)tetrahydro-2H-pyran: 2 wt.-% 4-Methyl-2-phenyl-3,6-dihydro-2H-pyran: 2 wt.-% 2,6,6-Trimethylcyclohexa-1,3-dienecarbaldehyde: 0.5 wt.-% 4-(dodecylthio)-4-methylpentan-2-one: 0.5 wt.-% 2-Methyl-3-[4-(2-methylpropyl)phenyl]propanal: 5 wt.-% 1-Phenylethyl acetate: 5 wt.-% (E)-2-((3,5-dimethylhexa-3-en-2-yl)oxy)-2-methylpropylcyclopropanecarboxylate: 5 wt.-%

[0046] 1-Methyl-4-propane-2-ylcyclohexa-1,4-diene: 5 wt.-% 2-(4-methylcyclohexa-3-en-1-yl)propan-2-ol: 5 wt.-% 1-Methyl-4-(propane-2-ylidene)cyclohexa-1-ene: 15 wt.-% 3,7-Dimethyloctan-3-ol: 50 wt.-% 1-(cyclopropylmethyl)-4-methoxybenzene: 10 wt.-% (E)-Trideca-2-ennitrile: 15 wt.-% 3-Phenylbutanal: 5 wt.-% 3-(benzo[d][1,3]dioxol-5-yl)-2-methylpropanal: 5 wt.-% (E)-4-methyldeca-3-en-5-ol: 25 wt.-% 2-Methoxynaphthalene: 15 wt.-% Cedarwood oil: 5 wt.-% Eucalyptus oil: 25 wt.-% Galbanum oil: 2 wt.-% Clove oil: 5 wt.-% Lavandin oil: 25 wt.-% Mandarin oil: 5 wt.-% Orange terpene: 50 wt.-% Patchouli oil: 10 wt.-% Iranian oil: 5 wt.-%

[0047] It was found that maintaining the concentration below the maximum value resulted in improved performance regarding the fragrance composition's suitability for olfactory perception and encapsulation.

[0048] In a preferred embodiment of the present invention, the fragrance composition comprises, preferably, one or more biodegradable components selected from the group consisting of: 2,6,10-trimethylundecane-9-enal; 2-(tert-butyl)cyclohexyl acetate; 2-methylundecaneal; propa-2-enyl2-(3-methylbutoxy)acetate; propa-2-enyl3-cyclohexylpropanoate; propa-2-enylheptanoate; benzyl acetate; 3,7-dimethylocta-6-en-1-yl acetate; (E)-1-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)buta-2-en-1-one; (E)-1-(2,6,6-trimethylcyclohexa- Xa-2-en-1-yl)buta-2-en-1-one; 5-hexyloxollan-2-one; 3-methyl-2-pentylcyclopenta-2-enone; 2-methyl-1-phenylpropane-2-yl acetate; 2-methyl-1-phenylpropane-2-ylbutanoate; 6-heptyltetrahydro-2H-pyran-2-one; 5-octyloxollan-2-one; ethylhexanoate; ethyl2-methyl Tylbutyrate; ethylheptanoate; (Z)-hexa-3-en-1-yl acetate; hexyl acetate; 3-methylbutyl acetate; 3-methylbutylbutanoate; 8-isopropyl-1-oxaspiro[4.5]decanoate; ethyl2-methylpentanoate; mercapto-para-menthane-3-one; 6-methylhepta-5-en-2-one; 8-methyl-1-oxaspiro[4.5] Decane-2-one; 2-(2-(4-methylcyclohexa-3-en-1-yl)propyl)cyclopentanone; (E)-methylnona-2-enoate; 6-propyltetrahydro-2H-pyran-2-one; 4-(tert-butyl)cyclohexyl acetate; 5-heptyldihydrofuran-2(3H)-one; (2E,5E)-5,6,7-trimethylocta-2,5-dien-4-one; 3-methylbuta-2-en-1-yl acetate; 5-pentyldihydrofuran-2(3H)-one; 4-(4-hydroxyphenyl)butan-2-one; and 4-(dodecylthio)-4-methylpentan-2-one. These components are particularly suitable for providing fragrances with fruity characteristics.

[0049] In a preferred embodiment of the present invention, the fragrance composition comprises, preferably, one or more biodegradable components selected from the group consisting of: 3-(4-isopropylphenyl)-2-methylpropanal; (E)-undec-9-enal; pentyl 2-hydroxybenzoate; 4-methoxybenzaldehyde; benzyl acetate; 3,7-dimethylocta-6-en-1-ol; 3,7-dimethylocta- 6-en-1-yl acetate; 1-methoxy-4-methylbenzene; 2-cyclohexylethyl acetate; cyclohexyl 2-hydroxybenzoate; (E)-1-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)buta-2-en-1-one; (E)-1-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-2-en-1-one; 2,6-dimethylocta-7-en-2-ol; oxydibenzene; 3-methyl-2-pentylcyclopenta-2-enone; methyl 2-(methylamino)benzoate E) 2-methyl-1-phenylpropane-2-yl acetate; 2,6-dimethylheptan-2-ol; 3-(3-isopropylphenyl)butanal; (E)-undeca-9-ennitrile; 1-phenylethyl acetate; (E)-3,7-dimethylocta-2,6-dien-1-ol; (E)-3,7-dimethylocta-2,6-dien-1-yl acetate; methyl 3-oxo-2-pentylcyclopentane acetate; (Z)-hexa-3-en-1-yl 2-hydroxybenzoate; (E)-4-(2,6,6-trimethic (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one; (E)-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one; (E)-2-methoxy-4-(propa-1-en-1-yl)phenol; 2-hexylcyclopenta-2-en-1-one; (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one;3-Butyl-5-methyltetrahydro-2H-pyran-4-yl acetate; 3,7-dimethylocta-1,6-dien-3-ol; 2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propane-2-ol; 3,7-dimethylocta-1,6-dien-3-yl acetate; (4-isopropylcyclohexyl)methanol; 3-methyl-5-phenylpentan-1-ol; methyl 2-aminobenzoate; methyl benzoate; methyl 2-hydroxybenzoate; (2Z)-3,7-dimethylocta-2,6-dien-1-ol; (Z)-3,7,11-trimethyldodeca-1,6,10-trien-3-ol; 2-ethoxynaphthalene; 1-(3-methylbenzofuran-2-yl)ethanone; (Z)-3,7-dimethylocta-2,6-dien-1-yl acetate; 3-(4-(2-methylpropyl)-2-methylphenyl)propanal; 1-(2-naphthalenyl)-ethanone; 3,7-dimethyloctan-1-ol; 2-phenylethyl acetate; (2E,5E)-5,6,7-trimethylocta-2,5-dien-4-one; deca-9-en-1-ol; 4-methyl-2-(2-methylpropa-1-en-1-yl)tetrahydro-2H-pyran; 4 -Methyl-2-phenyl-3,6-dihydro-2H-pyran; 2-methyl-3-[4-(2-methylpropyl)phenyl]propanal; 1-phenylethyl acetate; 3,7-dimethyloctan-3-ol; (E)-trideca-2-ennitrile; 3-phenylbutanal; 3-(benzo[d][1,3]dioxol-5-yl)-2-methylpropanal; and 2-methoxynaphthalene. These components are particularly suitable for providing fragrances with floral characteristics.

[0050] In a preferred embodiment of the present invention, the fragrance composition comprises, preferably, one or more biodegradable components selected from the group consisting of at least one, preferably at least two, more preferably at least four, and even more preferably at least six, from the following: 2,6,10-trimethylundeca-9-enal; decanal; undeca-10-enal; undecanal; dodecanal; 2-methylundecanal; octanal; (E)-undeca-9-enal; (E)-3,7-dimethylocta-2,6-dienal; (E)-deca-4-enal; (E)-dodeca-2-enal; 3-(3 (Isopropylphenyl)butanal; (E)-undeca-9-ennitrile; (E)-hexa-2-enal; (2E,6Z)-3,7-dimethylnonano-2,6-diennitrile; 2,6-dimethylhepta-5-enal; (Z)-nonano-6-enal; orange terpene; 2,4,7-trimethyl-6-octen-1-ol; 1-methyl-4-propan-2-ylcyclohexa-1,4-diene; 1-methyl-4-(propan-2-ylidene)cyclohexa-1-ene; (E)-trideca-2-ennitrile; and 3-(benzo[d][1,3]dioxol-5-yl)-2-methylpropanal. These components are particularly suitable for providing citrus-aldehyde-characterized fragrances.

[0051] In a preferred embodiment of the present invention, the fragrance composition comprises, preferably, one or more biodegradable components selected from the group consisting of at least one, preferably at least two, more preferably at least four, and even more preferably at least six, from the following: propa-2-enyl-2-(3-methylbutoxy)acetate; (1s,4s)-1,3,3-trimethyl-2-oxabicyclo[2.2.2]octane; 1-(5,5-dimethylcyclohexa-1-en-1-yl)penta-4-en-1-one; (Z)-hexa-3-en-1-ol; (Z)-hexa-3-en-1-ylacetate; methylnona-2-inoate; (E)-methylnona-2-enoate (2E,6Z)-nona-2,6-dienal; (Z)-nona-6-enal; (Z)-nona-6-en-1-ol; 2,6,6-trimethylbicyclo[3.1.1]hepta-2-ene; 6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane; 1-phenylethyl acetate; 1-methyl-4-propan-2-ylcyclohexa-1,4-diene; 2-(4-methylcyclohexa-3-en-1-yl)propan-2-ol; 1-methyl-4-(propan-2-ylidene)cyclohexa-1-ene; 1-(cyclopropylmethyl)-4-methoxybenzene; (E)-trideca-2-ennitrile; and (E)-4-methyldeca-3-en-5-ol. These components are particularly suitable for providing fragrances with green aromatic characteristics.

[0052] Furthermore, each of the biodegradable components(s) described herein may be present at a minimum concentration equal to or higher than 0.01 wt.-%, preferably 0.02 wt.-%, more preferably 0.05 wt.-%, even more preferably 0.1 wt.-%, and even more preferably 0.5 wt.-%.

[0053] In a preferred embodiment of the present invention, the weight ratio of the core to the total weight of the capsule, i.e., the sum of the weight of the core and the weight of the shell, is at least 60 wt.-%, preferably at least 70 wt.-%, more preferably at least 80 wt.-%, and even more preferably at least 90 wt.-%. A high weight ratio of the core to the total weight of the capsule can further increase the durability of the capsule, regardless of the shell material used.

[0054] In the context of the present invention, the shell of the microcapsule can be made of a biodegradable or non-biodegradable material.

[0055] The shell may contain a melamine-formaldehyde polymer. This type of core-shell capsule has been shown to be particularly suitable for fragrance encapsulation and is described in the prior art, examples of which are WO2008 / 098387A1, WO2016 / 207180A1 and WO2017 / 001672A1.

[0056] The shell may contain polyurea or polyurethane polymer. This type of core-shell capsule has also been successfully used for fragrance encapsulation and has the advantage of addressing consumer concerns about residual formaldehyde in the composition. Such capsules are described in the prior art, for example, in WO2019 / 174978A1.

[0057] The shell may contain a polymer stabilizer formed by a combination of at least one aminosilane of a polymer surfactant. The shell may subsequently contain polysaccharides, preferably polysaccharides containing beta(1→4) linked monosaccharide units, and more preferably cellulose derivatives, selected from the group consisting particularly of hydroxyethylcellulose, hydroxypropylmethylcellulose, cellulose acetate, and carboxymethylcellulose, preferably hydroxyethylcellulose.

[0058] The term "polymer surfactant" refers to a polymer, or a mixture containing at least one polymer, that, when dissolved in either or both of an oil phase and / or aqueous phase, has the property of reducing the interfacial tension between the oil phase and / or aqueous phase. This ability to reduce interfacial tension is called "surface activity."

[0059] In this context, the term "formed by combination" means that a polymer surfactant and at least one aminosilane come into contact with each other to form a polymer stabilizer. Without being bound by any theory, this formation can be the result of interactions such as dispersion forces, electrostatic forces, or hydrogen bonding between the polymer surfactant and at least one aminosilane. However, in a strict sense, chemical reactions for forming covalent bonds are also encompassed by this term. In other words, a polymer stabilizer can be considered as an aggregate comprising a portion derived from a polymer surfactant and a portion derived from at least one aminosilane.

[0060] Polymer surfactants are either soluble or dispersible in the aqueous phase or in water, respectively. This means that individual polymer surfactant polymers are substantially separated from each other in these liquids. The resulting system appears clear or hazy to the human eye.

[0061] Polymer stabilizers can be a factor in balancing microcapsule stability with respect to both fragrance leakage during storage and fragrance release under use conditions. In particular, the importance of providing additional stabilization at the oil-water interface has been recognized.

[0062] Polymer stabilizers thus provide a stable platform, which allows for the formation of novel encapsulated fragrance compositions for the addition of additional shell materials and / or shell precursors. More specifically, the addition of polysaccharides, preferably polysaccharides containing beta(1→4) linked monosaccharide units, and more preferably cellulose derivatives, results in highly sustainable microcapsules with an excellent release profile.

[0063] Polysaccharides may be deposited on the outer surface of the capsule shell formed by the polymer stabilizer. This results in a multilayer shell having at least one layer of polymer stabilizer and one layer of polysaccharides. The impermeability of the encapsulated shell can be improved by increasing the amount of capsule material.

[0064] To avoid ambiguity, this aspect of the present invention is not meant to be limited to a shell having distinctly discontinuous layers, although this is one viable embodiment. More specifically, the layers can be loose and discontinuous. On the other hand, and in other extreme examples, the shell can even be essentially uniform.

[0065] Polysaccharides can react with unreacted groups of polymer stabilizers and increase the density of the crosslinked shell. However, polysaccharides can also interact with polymer stabilizers through physical forces, physical interactions, such as hydrogen bonding, ionic interactions, hydrophobic interactions, or electron transfer interactions.

[0066] Shells containing additional polysaccharides can be further stabilized with a stabilizer. Preferably, the stabilizer contains at least two carboxylic acid groups. More preferably, the stabilizer is selected from the group consisting of citric acid, benzene-1,3,5-tricarboxylic acid, 2,5-franzicarboxylic acid, itaconic acid, poly(itaconic acid), and combinations thereof.

[0067] In specific embodiments of the present invention, the polymer surfactant comprises, in particular, a polysaccharide containing a carboxylic acid group. It has been found that combining such a polymer surfactant with at least one aminosilane results in the formation of a polymer stabilizer that is more sustainable than stabilizers known in the prior art, particularly from the standpoint of environmental and resource conservation. Without being bound by any theory, it is presumed that the carboxylic acid group reacts with at least one aminosilane in the manner described herein.

[0068] Polysaccharides containing carboxylic acid groups may contain uronic acid units, particularly hexuronic acid units. Polysaccharides having uronic acid units, especially hexuronic acid units, are widely available in nature. The hexuronic acid unit is selected from the group consisting of galacturonic acid units, glucuronic acid units, and in particular 4-O-methyl-glucuronic acid units, glucuronic acid units, and mannuronic acid units.

[0069] Polysaccharides containing carboxylic acid groups may be branched. Branched polysaccharides containing carboxylic acid groups have the advantage of forming a more compact network than linear polysaccharides, which is advantageous for the impermeability of the encapsulation shell, resulting in reduced leakage and higher encapsulation efficiency.

[0070] The polymer surfactant can be selected from pectin, gum arabic, and alginic acid. As shown in the examples, these polysaccharides provide the most suitable combination of solubility, viscosity, and interfacial activity, making the microcapsules according to the present invention particularly good in terms of handling, storage stability, and olfactory performance. The polymer surfactant may also be hyaluronic acid.

[0071] The aminosilane used in the formation of polymer stabilizers can be selected from compounds represented by formula (I). [ka]

[0072] In the above formula (I), R 1 , R 2 and R 3 are each independently a C1-C4 linear or branched alkyl or alkenyl residue, especially methyl or ethyl, and R 4 is an amine functional group, especially a C1-C 12 , preferably C1-C4, linear or branched alkyl or alkenyl residue.

[0073] When the functional group is a primary amine, it can be a terminal primary amine. R 4 is then preferably a C1-C8, even more preferably a C1-C4, linear terminal primary aminoalkyl residue. Specific aminosilanes of this category are selected from the group consisting of aminomethyltriethoxysilane, 2-aminoethyltriethoxysilane, 3-aminopropyltriethoxysilane, 4-aminobutyltri-ethoxysilane, 5-aminopentyltriethoxysilane, 6-aminohexyltriethoxysilane, 7-aminoheptyltriethoxysilane and 8-aminooctyltriethoxysilane.

[0074] Without being bound by any theory, it is presumed that the silane groups polycondense with each other to form a silica network at the liquid-liquid interface and further stabilize this interface. The aminosilane can be a bifunctional aminosilane. "Bifunctional aminosilane" means a molecule containing at least 1 amino group and 2 residues, each of these residues having at least 1 alkoxysilane moiety.

[0075] In a specific embodiment of the present invention, at least 1 bifunctional aminosilane has the formula (II). (O-R 4 ) (3-f) (R 3 ) f Si-R 2 -X-R 2 -Si(O-R4 ) (3-f) (R 3 ) f Formula (II) In equation (II) above, X is -NR 1 -, -NR 1 -CH2-NR 1 -, -NR 1 -CH2-CH2-NR 1 -, -NR 1 -CO-NR 1 -,or [ka] It represents.

[0076] In the above equation (II), R 1 Each of these independently represents H, CH3, or C2H5. 2 Each of these independently represents a linear or branched alkylene group having 1 to 6 carbon atoms. 3 Each of these independently represents a linear or branched alkyl group having 1 to 4 carbon atoms. 4 Each of these independently represents either H or a linear or branched alkyl group having 1 to 4 carbon atoms. f represents 0, 1, or 2.

[0077] Bipod-type aminosilanes are particularly advantageous compared to conventional silanes for forming a stable oil-water interface.

[0078] Examples of bipedal aminosilanes, but not limited to these, include 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, and N,N'-bis(3-(triethoxysilyl)propyl)piperazine.

[0079] Bipod-type aminosilanes can be secondary aminosilanes. Using secondary bipod-type aminosilanes instead of primary aminosilanes reduces the reactivity of the polymer stabilizer with respect to electrophilic species, particularly aldehydes. Therefore, encapsulating agents containing high levels of aldehydes can be encapsulated with a reduced tendency for harmful interactions between core-forming and shell-forming materials.

[0080] The secondary bilegged aminosilane can be bis(3-(triethoxysilyl)propyl)amine. This particular secondary aminosilane has the advantage of releasing ethanol instead of the more toxic and less desirable methanol during the polycondensation of the ethoxysilane group.

[0081] Other aminosilanes may be used in combination with the aforementioned bipodial aminosilanes, particularly the aminosilanes described herein. The weight ratio of aminosilane to polymer surfactant can be 0.1 to 1.1, particularly 0.2 to 0.9, and more specifically 0.3 to 0.7, for example 0.5.

[0082] Polymer stabilizers can be formed by combining polymer surfactants with at least one aminosilane and further polyfunctional isocyanates. Polyfunctional isocyanates can densify the arrangement of polymer surfactants at the oil / water interface. Without being bound by any theory, it is hypothesized that polyfunctional isocyanates crosslink both aminosilanes and polysaccharides by forming polyurea and polyurethane bonds.

[0083] The polyfunctional isocyanates may be selected from alkyl, alicyclic, aromatic, alkyl-aromatic, and anionic modified polyfunctional isocyanates having two or more (e.g., 3, 4, 5, etc.) isocyanate groups in the molecule.

[0084] Preferably, at least one polyfunctional isocyanate is an aromatic or alkyl-aromatic polyfunctional isocyanate, the alkyl-aromatic polyfunctional isocyanate preferably having a methyl isocyanate group bonded to the aromatic ring. Alkyl-aromatic polyfunctional isocyanates substituted with both aromatic and methyl isocyanates exhibit superior reactivity compared to alkyl and alicyclic polyfunctional isocyanates. Among these, 2-ethylpropane-1,2,3-triyltris((3-(isocyanatemethyl)phenyl)carbamate) is particularly preferred because its tripod-like properties are advantageous for the formation of intermolecular crosslinks and its intermediate reactivity is advantageous for network uniformity. This alkyl-aromatic polyfunctional isocyanate is commercially available from Mitsui under the trademark Takenate D-100 N, or from Covestro under the trademark Desmodur(R) Quix175.

[0085] In a particularly preferred embodiment of the present invention, the polymer stabilizer is formed by a combination of pectin with bis(3-(triethoxysilyl)propyl)amine. Preferably, the polymer stabilizer is formed by a combination of pectin with bis(3-(triethoxysilyl)propyl)amine and 2-ethylpropane-1,2,3-triyltris((3-(isocyanatemethyl)phenyl)carbamate). These combinations of natural polymer surfactants and bipodial secondary aminosilanes provide particularly advantageous interfacial stability and release properties. The stabilized interface is sufficiently impermeable to favorably encapsulate at least one beneficial agent contained in the core. The polymer stabilizer effectively forms a shell that encapsulates at least one fragrance component contained in the core.

[0086] As a further alternative, the shell may include a complex formed of at least one protein and at least one polysaccharide. Such core-shell capsules have proven suitable for fragrance encapsulation and are described in the prior art, for example, in WO 1996 / 020612 A1, WO 2001 / 03825 A1 or WO 2015 / 150370 A1.

[0087] In a preferred embodiment of the present invention, the shell is formed by crosslinking at least one protein with a first crosslinking agent to form a simple coacervate, followed by the addition of at least one polysaccharide to form a complex coacervate.

[0088] A "coacervate" refers to a state where droplets rich in polymer electrolytes coexist with a continuous aqueous phase that is poor in polymer electrolytes. The droplets aggregate at the interface, forming an interfacial layer.

[0089] In this context, coacervate droplets aggregate at the interface between the core composition and the aqueous phase. As a result, a stable core composition emulsion is formed in water, containing multiple core composition droplets, each surrounded by coacervate droplets. These stabilize the emulsion by preventing the droplets from coalescing.

[0090] These stabilized droplets act as templates, during which microencapsulation occurs.

[0091] In this context, "simple coacervation" refers to the formation of an interfacial layer containing a single polymer electrolyte. "Composite coacervation" refers to the formation of an interfacial layer containing a mixture of polymer electrolytes.

[0092] The phenomenon of simple or complex coacervation can be observed with an optical microscope, where it is indicated by the appearance of a ring around a droplet of the core composition. This ring consists of the aforementioned polymer electrolyte-rich phase and has a different refractive index than the surrounding aqueous phase.

[0093] Coaservation of a single polymer electrolyte is generally induced by bringing the polymer electrolyte closer to its isoelectric point (meaning the point where the pure charge of the polymer electrolyte is zero or close to zero). This may be achieved by changing the salt concentration, or, in the case of polymer electrolytes such as proteins, by changing the pH of the medium.

[0094] It was found that simple coacervation may also be induced by protein crosslinking at the core composition / water interface.

[0095] More specifically, it was found that a simple cross-linked protein coacervate is first formed at the core composition / aqueous phase interface, followed by the formation of a complex coacervation of this cross-linked protein with a second polyelectrolyte, i.e., at least one polysaccharide, resulting in the formation of a shell with enhanced impermeability. In particular, the shell exhibits enhanced impermeability to low molecular weight materials, i.e., materials with a molecular weight lower than 250 g / mol, such as fragrance components.

[0096] Furthermore, compared to conventional coacervate microcapsules, capsules obtained by this process exhibit increased stability in liquid consumer product formulations, particularly water-based consumer products such as fabric care conditioners.

[0097] Furthermore, the applicant has found that by implementing the aforementioned process, it is feasible to better control the size of microcapsules compared to conventional composite coacervation. In particular, it has become feasible to obtain microcapsules smaller than 75 μm. This is much smaller than the microcapsule sizes reported in the prior art. This is far more advantageous because microcapsules smaller than 75 μm are known to deposit better on substrates during rinse-off applications than larger microcapsules.

[0098] Proteins specifically preferred for this aspect of the present invention include gelatin, whey protein, pea protein, soy protein, casein, and albumin, with bovine serum albumin being an example.

[0099] In a preferred embodiment, at least one protein is gelatin, preferably type B gelatin. Type B gelatin can be obtained from the alkali treatment of collagen and is well known for its ability to form complexes with anionic polyelectrolytes such as negatively charged polysaccharides under weakly acidic conditions.

[0100] Gelatin is typically characterized by its so-called "bloom strength." In this context, bloom strength refers to the rigidity of a gelatin film, according to Chapter 2.1 of the Official Procedures of the Gelatin Manufacturers Institute of America, Inc., 2019 revised edition. According to this procedure, the bloom strength, as expressed in bloom, is equal to the weight in grams required to move a standardized plunger with a diameter of 12.5 mm vertically to a depth of 4 mm into a gelatin gel prepared under controlled conditions, i.e., in a standardized jar, by dissolving 6.67 wt% gelatin in deionized water at 60°C and allowing the gel to form at 10°C for 17 hours. A higher weight indicates a higher bloom strength of the gelatin used to prepare the test gel.

[0101] In a preferred embodiment, the type B gelatin has a bloom strength of 200–250. If the bloom strength is too low, the gel is mechanically weak, and the resulting coacervate may not form an independent layer of gelatin-rich phase around the core composition. If the bloom strength is too high, then the resulting coacervate and gelatin may be too brittle.

[0102] Type B gelatin can be obtained from fish because fish gelatin is more readily accepted by consumers than beef or pork gelatin, mainly due to health concerns, social background, or religious reasons.

[0103] Alternatively, the protein can be vegetable protein, particularly pea protein and / or soy protein, which has the advantage of being vegan.

[0104] In a preferred embodiment, the first crosslinking agent is a trifunctional alkyl aromatic isocyanate. As stated previously, and without being bound by any theory, the applicant believes that alkyl aromatic isocyanate groups have the advantage of having intermediate reactivity compared to highly reactive aromatic isocyanates and less reactive aliphatic isocyanates.

[0105] More preferably, the trifunctional alkyl aromatic isocyanate is an adduct of 2-ethylpropane-1,2,3-triol or 2-ethyl-2-(hydroxymethyl)propane-1,3-diol with 1-isocyanate-2-(isocyanatemethyl)benzene, 1-isocyanate-3-(isocyanatemethyl)benzene and / or 1-isocyanate-4-(isocyanatemethyl)benzene.

[0106] In a specifically preferred embodiment, the trifunctional aromatic aliphatic isocyanate is an adduct of 2-ethylpropane-1,2,3-triol and 1-isocyanate-3-(isocyanatemethyl)benzene. The adduct of 2-ethylpropane-1,2,3-triol and 1-isocyanate-3-(isocyanatemethyl)benzene is commercially available under the trademarks Takenate D110-N (ex Mitsui Chemicals) or Quix 175 (ex Covestro).

[0107] In connection with this aspect of the present invention, at least one polysaccharide, preferably containing a carboxylic acid group, is used. Polysaccharides containing a carboxylic acid group are particularly suitable for complex coacervation with proteins, and especially with type B gelatin. This is because adjusting the pH adjusts the net charge of these polysaccharides, promoting complex formation with amphoteric proteins. Complex formation occurs at a pH where the protein as a whole has a positive charge, while the polysaccharide as a whole has a negative charge, resulting in a neutral overall charge for the complex. These polysaccharides include native polysaccharides and modified polysaccharides from nature. Monovalent alkali metal salts of these polysaccharides can also be used.

[0108] In particular, at least one sugar is selected from the group consisting of carboxymethylcellulose, gum arabic, alginic acid, pectin, hyaluronic acid, xanthan gum, gellan gum, and salts thereof with monovalent alkali metals. Carboxymethylcellulose, sodium carboxymethylcellulose, and gum arabic are particularly preferred.

[0109] In a preferred embodiment, the impermeability and stability of the shell may be further improved by crosslinking the composite coacervate with a second crosslinking agent. In a particularly preferred embodiment, the second crosslinking agent is a bifunctional 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, and 2,2'-bipyridyl-5,5'-dialdehyde. Bifunctional aldehydes are known as effective crosslinking agents for proteins.

[0110] With respect to this aspect of the present invention, the weight ratio of the first crosslinking agent, in particular a trifunctional aromatic aliphatic isocyanate, to at least one protein, in particular gelatin, can be 0.08 to 1.2, preferably 0.12 to 0.8, more preferably 0.16 to 0.6, and even more preferably 0.2 to 0.4. With such a weight ratio of the first crosslinking agent to the protein, good stability of the microcapsules, particularly with respect to leakage, can be achieved while simultaneously ensuring biodegradability.

[0111] The weight ratio of polysaccharides to proteins typically depends on the properties of the polysaccharides. Without being bound by any theory, this weight ratio is considered to depend on the degree of substitution of the polysaccharide, particularly at the carboxyl or carboxylate groups, where applicable. Preferably, the weight ratio between at least one polysaccharide and at least one protein is 0.05 to 0.5, preferably 0.08 to 0.2.

[0112] The shell may, in its polymerized form, contain one or more monoethylene unsaturated and / or polyethylene unsaturated monomers. This type of core-shell capsule has also been successfully used for fragrance encapsulation. Such capsules are described in the prior art, for example, in WO 2013 / 11191 2A1 or WO 2014 / 032920 A1.

[0113] In a preferred embodiment of the present invention, the median volume diameter Dv(50) of the multiple core-shell microcapsules is 1 to 100 μm, preferably 5 to 75 μm, more preferably 8 to 60 μm, and even more preferably 10 to 30 μm. Microcapsules having a median volume diameter in the range of 10 to 30 μm exhibit optimal deposition on various substrates such as fabrics and hair.

[0114] Microcapsules according to the present invention may be further processed. Further processing may include treatment of the composition with an antimicrobial preservative. Further processing may also include the addition of suspension aids, such as hydrocolloid suspension aids, to help stabilize the physical dispersion of the microcapsules and prevent any creaming or coalescence. Any additional adjuvants in the conventional art may also be added during further processing.

[0115] In accordance with the present invention, core-shell microcapsules may be coated with a functional coating if desired. The functional coating may coat the microcapsule shell entirely or only partially. Whether the functional coating is charged or uncharged, its primary purpose is to achieve desired effects, such as altering the surface properties of the microcapsules and promoting the deposition of microcapsules on treatment surfaces such as fabrics, human skin, or hair. The functional coating may be applied retrospectively to already formed microcapsules, or it may be physically incorporated into the microcapsule shell during shell formation. They may be attached to the shell by physical forces, physical interactions such as hydrogen bonding, ionic interactions, hydrophobic interactions, or electron mobile phase interactions, or they may be covalently bonded to the shell.

[0116] The resulting encapsulated composition, presented in the form of a slurry of microcapsules suspended in an aqueous suspension medium, may be directly incorporated into a consumer product base. However, if desired, the slurry may be dried, and the encapsulated composition may be presented in the form of a dried powder. Drying of the microcapsule slurry may be carried out conventionally and according to techniques known in the art, such as spray drying, evaporation, freeze-drying, or the use of a desiccant. Typically, as conventional in the art, the dried microcapsules are dispersed or suspended in a suitable powder, such as powdered silica, which can act as a bulking agent or flow aid. Such a suitable powder may be added to the encapsulated composition before, during, or after the drying step.

[0117] The present invention also relates to consumer products, preferably fabric care products, home care products, or personal care products, comprising the encapsulated compositions described herein.

[0118] Biodegradation is particularly important for consumer products in the aforementioned categories, because during and after their intended use, the components of these products enter the environment through household wastewater. Biodegradation is the primary process of removal in wastewater treatment plants, environmental water, and soil.

[0119] The encapsulated compositions of the present invention, which contain fragrance components, can be used to scent all kinds of consumer products, including laundry care detergents, laundry care conditioners, personal care cleansing compositions such as shampoos, bath and shower gels, liquid soaps, soap bars, personal care conditioning compositions such as hair care conditioners, bath and shower lotions, deodorant compositions, antiperspirant compositions, home care compositions such as hard surface cleaners, and heavy-duty cleaning agents.

[0120] The encapsulated compositions according to the present invention are particularly useful when used as fragrance delivery vehicles in consumer goods where it is required that the microcapsules adhere well to the substrate to which they are applied in order to deliver optimal fragrance benefits. Such consumer goods include hair shampoos and conditioners, as well as textile treatment products, such as laundry detergents and conditioners.

[0121] Consumer products may contain the compositions described above in this specification, preferably at a level of 0.005 to 5 wt.-%, more preferably 0.01 to 1 wt.-%, and even more preferably 0.02 to 0.5 wt.-% of the consumer product.

[0122] The consumer products described herein as described above may additionally include an unencapsulated fragrance composition. The unencapsulated fragrance composition may contain, and preferably consist of, at least one, preferably at least two, more preferably at least four, even more preferably at least eight, even more preferably at least sixteen, even more preferably at least 32, and even more preferably at least 64 biodegradable components. The biodegradable components may be present in 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.-%, and even more preferably at least 95 wt.-% of the total weight of the fragrance composition. The biodegradable components may be selected from the group identified above herein. The unencapsulated fragrance composition may be identical or different from the fragrance composition used in the encapsulated compositions described herein as described above.

[0123] A further aspect of the present invention relates to the use of the encapsulated compositions described herein for obtaining consumer products.

[0124] This disclosure also relates to the use of the encapsulated compositions described herein to enhance the performance of a beneficial agent in a consumer product, or to methods for enhancing the performance of a beneficial agent in a consumer product by adding an encapsulated composition according to the present invention.

[0125] The following are preferred methods for implementing OECD Method 301F.

[0126] principle: As the sole nominal source of organic carbon, a weighed inoculated inorganic medium containing a known concentration of the test substance is stirred in a sealed flask at a constant temperature. Evaporated carbon dioxide is absorbed by a sodium hydroxide pellet. Oxygen consumption is determined by measuring the pressure drop in the respirometer flask. The biological oxygen demand (BOD), i.e., the amount of oxygen taken in by the microbial population during the biodegradation of the test chemical (corrected for uptake by a parallel blank inoculation), is expressed as a percentage of ThOD (theoretical oxygen demand, calculated from elemental composition assuming that carbon is oxidized to carbon dioxide, hydrogen to water, and nitrogen to ammonium, nitrite, or nitrate).

[0127] Device: The respirometer used was manufactured by Oxitop Control System, Wissenschaftlich-Technische Werkstaetten (WTW), Weilheim, Germany.

[0128] water: The water used is ultrapure water with a total organic carbon content of less than 5 ppb, produced using the Millipore Direct-Q 3 UV purification system.

[0129] Stock solution of mineral components: Solution A: KH2PO 48.5g K2HPO4 21.75g Na2HPO4·2H2O 33.4g NH4Cl 0.5g It was dissolved in water to make 1 liter.

[0130] Solution B: CaCl2 27.5g It was dissolved in water to make 1 liter.

[0131] Solution C: MgSO4·7H2O 22.5g It was dissolved in water to make 1 liter.

[0132] Solution D: FeCl3·6H2O 0.25g 1 drop of HCl Conc. It was dissolved in water to make 1 liter.

[0133] Inorganic medium: The inorganic medium is prepared by mixing 50 ml of solution A with 2 liters of deionized water, adding 5 ml each of solutions B, C, and D, and then preparing up to 5 liters with deionized water. The pH is measured and adjusted to 7.4 ± 0.2 with phosphoric acid or potassium hydroxide if necessary.

[0134] Inoculation: It primarily uses fresh activated sludge from biological wastewater treatment facilities (Bois-de-Bay, Satigny, Switzerland) that treat domestic wastewater. The sludge is collected in the morning, washed three times in an inorganic medium (by centrifuging 1000g for 10 minutes, discarding the supernatant, and resuspending it in an inorganic medium), and stored under aerobic conditions until use on the same day.

[0135] Determination of the dry weight of a suspended solid: The dry weight of the suspended solid is determined by taking two 50 ml samples of homogenized sludge, evaporating the water in a steam bath, drying them in an oven at 105-110°C for 2 hours, and measuring the weight of the residue.

[0136] Reference substance: Sodium benzoate (Fluka, Buchs, Switzerland, Art. No. 71300), purity: minimum 99.0%.

[0137] Flask preparation: The test substance sample (equivalent to 30.0 mg / l in 255 ml of test medium) is weighed into a small aluminum boat and added directly to the Oxitop test flask. The reference substance sample (12.75 mg, equivalent to 50.0 mg / l in 255 ml of test medium) is weighed into a small aluminum boat and added directly to the Oxitop test flask.

[0138] Fill the flask with 250 ml of inorganic medium. Add a sample of the test or reference substance. Then add 5.00 ml of suspended sludge diluted to a concentration of 1.53 g / l dry material. Unless the test substance has acidic or alkaline characteristics, the pH of each flask is not measured and is assumed to be the same as that of the inorganic medium, so as not to remove any undissolved test substance suspended in the test solution by immersing the glass electrode in the test medium. It has been shown that even a neutral test substance, sodium benzoate, does not affect the pH of the medium by more than 0.1 pH units. Place two pellets of sodium hydroxide in the pipe on top of the bottle and tightly close the flask with the measuring head. Allow the flask to equilibrate to the test temperature. Start the measurement by programming the measuring unit of the Oxitop test flask and place the test flask in a temperature-controlled cabinet of the Oxitop system. After temperature equilibrium, the instrument's controller starts data acquisition (zero hour of the experiment).

[0139] Test temperature: The test temperature is 21.5 ± 0.5°C.

[0140] Conducting the test: Record the oxygen consumption of each flask daily and verify the correct temperature and stirring. At the end of the test period (usually 28 days), remeasure the pH of each flask.

[0141] The biodegradation of each data point is calculated as follows: D = (CB) / ThOD · 100% D: Biodegradation of the sample C: O2 uptake of samples and sludge B: O2 uptake in sludge (inoculation blank) ThOD: Theoretical Oxygen Demand

[0142] The passing level for "easily biodegradable" is reaching 60% of the theoretical oxygen demand (ThOD). This passing value must be reached within a 10-day window during the 28-day testing period. This 10-day window begins when the ThOD reaches 10% and must be completed by the 28th day of the testing period.

[0143] The passing level for "inherent biodegradability" is also 60% of the theoretical oxygen demand (ThOD). However, this passing value can be reached after a 28-day testing period, which is usually extended to 60 days. The 10-day limit does not apply.

[0144] Further features and specific advantages of the present invention will become apparent from the following examples.

[0145] Example 1: Fragrance composition consisting of biodegradable components A fragrance composition consisting of biodegradable components can be prepared by mixing such components according to the formulations given in Table 1.

[0146] [Table 1-1] [Table 1-2] [Table 1-3]

[0147] Example 2: Decomposition test of fragrance composition Fragrance compositions according to Table 1 can be subjected to the biodegradation tests described herein as described above. Since all components used in these fragrance compositions are biodegradable, it will be understood that these fragrance compositions are particularly beneficial from a biodegradation standpoint.

[0148] Example 3: Preparation of melamine-formaldehyde microcapsules Melamine-formaldehyde microcapsules according to the present invention can be prepared by following the procedure below with the fragrance composition described herein (Table 1): - WO 2008 / 098387 Example 1.3 of A1 - Example 1 of WO 2016 / 207180 A1 - Example 1 of WO 2017 / 001672 A1

[0149] Example 4: Preparation of polyurea microcapsules Polyurea microcapsules according to the present invention can be prepared by following the procedure below with the fragrance composition described above (Table 1): - Example 1 of WO 2019 / 174978 A1

[0150] Example 5: Preparation of Cellulose Microcapsules Microcapsules according to the present invention can be prepared by performing the following steps: a) Prepare by mixing 0.66 g of bipodial aminosilane (bis(3-triethoxysilylpropyl)amine), 0.48 g of Takenate D-110N (ex Mitsui), and 38.5 g of the fragrance as specified above (Table 1); b) Emulsify the core composition obtained in step a) in a mixture of 66.2 g of 1.35 g of high-methoxylated grade pectin (type APA 104, ex Roeper) in water using a cross-beam stirrer with a pitched beam, in a 300 ml reactor and at a stirring speed of 800 rpm for 10 minutes at a temperature of 25 ± 2°C; c) Adjust the pH of the continuous phase of the emulsion to 6.5 ± 0.5 with a 10% sodium hydroxide solution in water, and maintain the system at a temperature of 25 ± 2°C for 1 hour while maintaining the stirring in step b); d) Gradually raise the temperature to 85°C over 2.5 hours, and maintain the temperature at 85°C for 1 hour while continuing the stirring in steps b) and c) to complete the formation of the core-shell capsule; e) Add 1.8 g of 2-hydroxyethylcellulose and continue stirring at 85°C for 30 minutes; f) Add 0.8 g of a 30% diluted citric acid solution to water and continue stirring at 85°C for 1 hour; g) Cool the core-shell capsule slurry obtained in step f) to room temperature.

[0151] Example 6: Preparation of gelatin coacervate microcapsules Gelatin corecervate microcapsules according to the present invention can be prepared by following the procedure below with the fragrance composition described herein (Table 1): - Example 1 of WO 1996 / 020612 A1 - Example 2 of WO 2001 / 03825 A1 - WO 2015 / 150370 A1 Example 1-3

[0152] Example 7: Preparation of gelatin coacervate microcapsules Microcapsules according to the present invention can be prepared by performing the following steps: a) To provide a core composition by dissolving 70 g of a trifunctional aromatic aliphatic isocyanate (Takenate N100-D, ex Mitsui Inc., 75 wt.-% activity content) in 165 g of the fragrance as described above (Table 1); b) Provide an aqueous phase by mixing 17 g of type B gelatin with 150 g of deionized water; c) Heat the aqueous phase to 35°C under stirring to dissolve the gelatin; d) Emulsify the core composition in the aqueous phase obtained in step c) at a stirring speed of 1000 rpm to obtain an emulsion of core composition droplets having a volume average diameter Dv(50) of 50 μm dispersed in water; e) Heat the emulsion obtained in step d) to a temperature of 90°C and maintain the emulsion at this temperature for 10 minutes; f) Cool the slurry obtained in step e) to a temperature of 31°C to induce simple coacervation of cross-linked gelatin at the core-water interface, thereby forming a slurry of core-shell microcapsules; g) Add 80 g of 2 wt.-% aqueous carboxymethylcellulose solution to deionized water, and then add 534 g of deionized water to the slurry formed in step f) while maintaining a stirring speed of 1000 rpm; h) Adjust the pH of the slurry to 5.3 with a 10 wt.-% citric acid solution in water; reduce the stirring speed to 600 rpm and form cross-linked gelatin / polysaccharide coacervates on the surface of the microcapsules obtained in step f); i) Cool the slurry obtained in step h) to a temperature of 10-15°C over 1 hour; j) Add 26 g of glutaraldehyde to the slurry while stirring and maintaining the slurry at 15°C for 1 minute. Allow the slurry to warm to room temperature over 1 hour to obtain a slurry of microcapsules. k) Complete the mixture to 1000g using deionized water.

[0153] Example 8: Preparation of polyacrylate-based microcapsules Microcapsules based on polyacrylate according to the present invention can be prepared by following the procedure below with the fragrance compositions described herein (Table 1): - Example 1 of WO 2013 / 111912 A1 - WO 2014 / 032920 Example 1 of A1

Claims

1. An encapsulated composition comprising multiple core-shell microcapsules, wherein each core-shell microcapsule comprises a core and a shell surrounding the core, wherein the core comprises a fragrance composition comprising at least one biodegradable component(s), wherein the biodegradable component(s) are present at a total concentration of at least 75 wt% relative to the total weight of the fragrance composition. The biodegradable component(s) is / are (E)-2-methoxy-4-(prop-1-en-1-yl)phenyl acetate; 2,6,10-trimethylundeca-9-enal; 2-(tert-butyl)cyclohexyl acetate; decanal; undeca-10-enal; undecal; dodecanal; 2-methylundecal; octanal; 3-(4-isopropylphenyl)-2-methylpropanal; (E)-undeca-9-enal; propa-2-enyl-2-(3-methylbutoxy) acetate; propa-2-enyl-3-cyclohexylpropanoate; propa-2-enylheptanoate; (Z)-oxacycloheptadeca-10-en-2-one; (3aR, 5aS, (9aS,9bR)-3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1H-benzo[e][1]benzofuran; pentyl 2-hydroxybenzoate; 4-methoxybenzaldehyde; benzyl acetate; benzyl 2-hydroxybenzoate; (2S,4S)-1,7,7-trimethylbicyclo[2.2.1]heptane-2-yl acetate; 5-isopropyl-2-methylphenol; (1S,8aR)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methanoazulene; (1S,6R,8aR)-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene-6-yl acetate; (1R,6S,8aS)-6-methoxy-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene; (E)-3,7-dimethylocta-2,6-dienal; 3,7-dimethylocta-6-en-1-ol; 3,7-dimethylocta-6-en-1-yl Acetate; (Z)-3-methylcyclotetradeca-5-enone; 1-methoxy-4-methylbenzene; 2-cyclohexylethyl acetate; cyclohexyl 2-hydroxybenzoate; (E)-1-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)buta-2-en-1-one; (E)-1-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-2-en-1-one; 5-Hexyloxolan-2-one; (E)-Deca-4-enal; 2,6-Dimethylocta-7-en-2-ol; Oxydibenzene; 1-Methoxy-4-propylbenzene; 3-Methyl-2-pentylcyclopenta-2-enone; Methyl-2-(methylamino)benzoate; 2-Methyl-1-phenylpropane-2-ylacetate; 2-Methyl-1-phenylpropane-2-ylbutanoate; 2,6-dimethylheptan-2-ol; 6-heptyltetrahydro-2H-pyran-2-one; 5-Octyloxolan-2-one; (E)-Dodeca-2-enal; (E)-3-methyl-5-(2,2,3-trimethylcyclopenta-3-en-1-yl)penta-4-en-2-ol; Ethylhexanoate; Ethyl 2-methylbutyrate; 2-Ethyl-3-hydroxy-4H-pyran-4-one; Ethylheptanoate; 3-Ethoxy-4-hydroxybenzaldehyde; 1,4-Dioxacycloheptadecane-5,17-dione; (1s ,4s)-1,3,3-trimethyl-2-oxabicyclo[2.2.2]octane;4-allyl-2-methoxyphenol;methyl 2,4-dihydroxy-3,6-dimethylbenzoate;3a,6,6,9a-tetramethyldodecahydronaphtho[2,1-b]furan;3-(3-isopropylphenyl)butanal;(E)-undeca-9-ennitrile;1-(5,5-dimethylcyclohexa-1-en-1-yl)penta-4-en-1-one; 1-Phenylethyl acetate; (E)-3,7-dimethylocta-2,6-dien-1-ol; (E)-3,7-dimethylocta-2,6-dien-1-yl acetate; (E)-oxacyclohexadeca-12-en-2-one; methyl 3-oxo-2-pentylcyclopentane acetate; (E)-hexa-2-enal; (Z)-hexa-3-en-1-ol; (Z)-hexa-3-en-1-yl acetate; (Z)-hexa-3-en-1-yl 2-hydroxybenzoate; hexyl acetate; 8,8-di(1H-indole-3-yl)-2,6-dimethyloctan-2-ol; (E)-4-(2,6,6-trimethylcyclohexa-1-en-1-yl)buta-3-en-2-one; (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one; (E)-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one; 3-Methylbutyl acetate; 3-Methylbutylbutanoate; (E)-2-Methoxy-4-(propa-1-en-1-yl)phenol; 2-Hexylcyclopenta-2-en-1-one; (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one; 3-Butyl-5-methyltetrahydro-2H-pyran-4-yl acetate; 8-isopropyl-1-oxaspiro[4.5]decane-2-one; (2E,6Z)-3,7-dimethylnonano-2,6-diennitrile; 3,7-dimethylocta-1,6-dien-3-ol; 2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propan-2-ol; 3,7-dimethylocta-1,6-dien-3-yl acetate; ethyl 2-methylpentanoate; (4-isopropylcyclohexyl)methanol; 3-methyl-5-phenylpentan-1-ol; 2,6-dimethylhepta-5-enal; mercapto-para-menthan-3-one; methyl 2-aminobenzoate; methylbenzoate; 2-ethoxy-4-(methoxymethyl)phenol; 6-methylhepta-5-en-2-one; 8-methyl-1-oxaspiro[4.5]decane-2-one; methylnonano-2-inoate; methyl-2-hydroxybenzoate; 2-(2-(4-methylcyclohexa-3-en-1-yl)propyl)cyclopentanone; (E)-methylnonano-2-enoate; (2Z)-3,7-dimethylocta-2,6-dien-1-ol; (Z)-3,7,11-trimethyldodeca-1,6,10-trien-3-ol; 2-ethoxynaphthalene; 1-(3-methylbenzofuran-2-yl)ethanone; ( Z)-3,7-dimethylocta-2,6-dien-1-yl acetate; (2E,6Z)-nona-2,6-dienal; (Z)-nona-6-enal; (Z)-nona-6-en-1-ol; 3-(4-(2-methylpropyl)-2-methylphenyl)propanal; 6-propyltetrahydro-2H-pyran-2-one; 1-(2-naphthalenyl)-ethanone; 4-(tert-butyl)cyclohexyl acetate; 5-heptyldihydrofuran-2(3H)-one; 3,7-dimethyloctan-1-ol; 2-phenylethyl acetate; 2,6,6-trimethylbicyclo[3.1.1]hepta-2-ene; 6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane; (2E,5E)-5,6,7-trimethylocta-2,5-dien-4-one; 2,4,7-trimethyl-6-octen-1-ol; 3-Methylbuta-2-en-1-yl acetate; 5-Pentyldihydrofuran-2(3H)-one; 4-(4-hydroxyphenyl)butan-2-one; Deca-9-en-1-ol; 4-Methyl-2-(2-methylpropane-1-en-1-yl)tetrahydro-2H-pyran; 4-methyl-2-phenyl-3,6-dihydro-2H-pyran; 2,6,6-trimethylcyclohexa-1,3-dienecarbaldehyde; 4-(dodecylthio)-4-methylpentan-2-one; 2-methyl-3-[4-(2-methylpropyl)phenyl]propanal; 1-phenylethyl acetate; (E)-2-((3,5-dimethylhexa-3-en-2-yl)oxy)-2-methylpropylcyclopropanecarboxylate; 1-methyl-4-propan-2-ylcyclohexa-1,4-diene; 2-(4-methylcyclohexa-3-en-1-yl)propan-2-ol; Selected from the group consisting of 1-methyl-4-(propan-2-ylidene)cyclohexa-1-ene; 3,7-dimethyloctan-3-ol; 1-(cyclopropylmethyl)-4-methoxybenzene; (E)-trideca-2-ennitrile; 3-phenylbutanal; 3-(benzo[d][1,3]dioxol-5-yl)-2-methylpropanal; (E)-4-methyldeca-3-en-5-ol; 2-methoxynaphthalene; cedarwood oil; eucalyptus oil; galbanum oil; clove oil; lavandin oil; mandarin oil; orange terpene; patchouli oil; and ylang-langensis oil, The encapsulated composition wherein each of the biodegradable components (one or more) is present at a concentration equal to or less than the following maximum concentration: (E)-2-methoxy-4-(propa-1-en-1-yl)phenylacetate: 0.1 wt% 2,6,10-trimethylundeca-9-enal: 1 wt% 2-(tert-butyl)cyclohexyl acetate: 50 wt% Decand: 10 wt% Undeka-10-Enal: 2 wt% Undecanal: 5 wt% Dodecanal: 10 wt% 2-Methylundecanal: 50 wt% Octanal: 5 wt% 3-(4-isopropylphenyl)-2-methylpropanal: 5 wt% (E)-Undeka-9-Enal: 5 wt% Proper-2-enyl-2-(3-methylbutoxy)acetate: 5 wt% Propa-2-enyl-3-cyclohexylpropanoate: 10 wt% Propa-2-enylheptanoate: 10 wt% (Z)-Oxacycloheptadeca-10-en-2-one: 2 wt% (3aR,5aS,9aS,9bR)-3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b-octahydro-1H-benzo[e][1]benzofuran: 2 wt% Pentyl 2-hydroxybenzoate: 50 wt% 4-Methoxybenzaldehyde: 5 wt% Benzyl acetate: 10 wt% Benzyl 2-hydroxybenzoate: 75 wt% (2S,4S)-1,7,7-trimethylbicyclo[2.2.1]heptane-2-ylacetate: 50 wt% 5-Isopropyl-2-methylphenol: 1 wt% (1S,8aR)-1,4,4,6-tetramethyl-2,3,3a,4,5,8-hexahydro-1H-5,8a-methanoazulene: 5 wt% (1S,6R,8aR)-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene-6-ylacetate: 5 wt% (1R,6S,8aS)-6-methoxy-1,4,4,6-tetramethyloctahydro-1H-5,8a-methanoazulene: 5 wt% (E)-3,7-dimethylocta-2,6-dienal: 10 wt% 3,7-Dimethylocta-6-en-1-ol: 25 wt% 3,7-Dimethylocta-6-en-1-ylacetate: 25 wt% (Z)-3-methylcyclotetradeca-5-enone: 5 wt% 1-Methoxy-4-methylbenzene: 1 wt% 2-Cyclohexylethyl acetate: 25 wt% Cyclohexyl 2-hydroxybenzoate: 15 wt% (E)-1-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)buta-2-en-1-one: 2.5 wt% (E)-1-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-2-en-1-one: 5 wt% 5-Hexyloxollan-2-one: 15 wt% (E)-Deca-4-Enal: 1 wt% 2,6-Dimethylocta-7-en-2-ol: 50 wt% Oxydibenzene: 15 wt% 1-Methoxy-4-propylbenzene: 2 wt% 3-Methyl-2-pentylcyclopenta-2-enone: 5 wt% Methyl 2-(methylamino)benzoate: 1 wt% 2-Methyl-1-phenylpropane-2-yl acetate: 75 wt% 2-Methyl-1-phenylpropane-2-ylbutanoate: 50 wt% 2,6-Dimethylheptan-2-ol: 5 wt% 6-Heptyltetrahydro-2H-pyran-2-one: 5 wt% 5-Octyloxollan-2-one: 10 wt% (E)-Dodeca-2-Enal: 0.5 wt% (E)-3-methyl-5-(2,2,3-trimethylcyclopenta-3-en-1-yl)penta-4-en-2-ol: 5 wt% Ethylhexanoate: 10 wt% Ethyl 2-methylbutyrate: 15 wt% 2-Ethyl-3-hydroxy-4H-pyran-4-one: 10 wt% Ethylheptanoate: 5 wt% 3-Ethoxy-4-hydroxybenzaldehyde: 10 wt% 1,4-Dioxacycloheptadecane-5,17-dione: 25 wt% (1s,4s)-1,3,3-trimethyl-2-oxabicyclo[2.2.2]octane: 25 wt% 4-allyl-2-methoxyphenol: 5 wt% Methyl 2,4-dihydroxy-3,6-dimethylbenzoate: 2 wt% 3a,6,6,9a-Tetramethyldodecahynaphtho[2,1-b]furan: 2 wt% 3-(3-isopropylphenyl)butanal: 5 wt% (E)-Undeca-9-ennitrile: 1 wt% 1-(5,5-dimethylcyclohexa-1-en-1-yl)penta-4-en-1-one: 5 wt% 1-Phenylethyl acetate: 5 wt% (E)-3,7-dimethylocta-2,6-dien-1-ol: 25 wt% (E)-3,7-dimethylocta-2,6-diene-1-ylacetate: 15 wt% (E)-Oxacyclohexadeca-12-en-2-one: 15 wt% Methyl 3-oxo-2-pentylcyclopentane acetate: 75 wt% (E)-Hexa-2-Enal: 1 wt% (Z)-Hexa-3-en-1-ol: 15 wt% (Z)-Hexa-3-ene-1-ylacetate: 15 wt% (Z)-Hexa-3-en-1-yl-2-hydroxybenzoate: 15 wt% Hexyl acetate: 15 wt% 8,8-di(1H-indole-3-yl)-2,6-dimethyloctan-2-ol: 2 wt% (E)-4-(2,6,6-trimethylcyclohexa-1-en-1-yl)buta-3-en-2-one: 25 wt% (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one: 5 wt% (E)-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one: 25 wt% 3-Methylbutyl acetate: 5 wt% 3-Methylbutylbutanoate: 1 wt% (E)-2-methoxy-4-(propa-1-en-1-yl)phenol: 1 wt% 2-Hexylcyclopenta-2-en-1-one: 5 wt% (E)-3-methyl-4-(2,6,6-trimethylcyclohexa-2-en-1-yl)buta-3-en-2-one: 50 wt% 3-Butyl-5-methyltetrahydro-2H-pyran-4-yl acetate: 15 wt% 8-Isopropyl-1-oxaspiro[4.5]decane-2-one: 1 wt% (2E,6Z)-3,7-dimethylnona-2,6-diennitrile: 25 wt% 3,7-dimethylocta-1,6-dien-3-ol: 25 wt% 2-(5-methyl-5-vinyltetrahydrofuran-2-yl)propan-2-ol: 1 wt% 3,7-Dimethylocta-1,6-diene-3-ylacetate: 25 wt% Ethyl 2-methylpentanoate: 10 wt% (4-Isopropylcyclohexyl)methanol: 5 wt% 3-Methyl-5-phenylpentan-1-ol: 10 wt% 2,6-Dimethylhepta-5-enal: 2 wt% Mercapto-para-menthan-3-one: 1 wt% Methyl 2-aminobenzoate: 2 wt% Methylbenzoate: 1 wt% 2-Ethoxy-4-(methoxymethyl)phenol: 1 wt% 6-Methylhepta-5-en-2-one: 5 wt% 8-Methyl-1-oxaspiro[4.5]decane-2-one: 2 wt% Methylnonano-2-inoate: 1 wt% Methyl 2-hydroxybenzoate: 1 wt% 2-(2-(4-methylcyclohexa-3-en-1-yl)propyl)cyclopentanone: 50 wt% (E)-methylnona-2-enoate: 2 wt% (2Z)-3,7-dimethylocta-2,6-dien-1-ol: 10 wt% (Z)-3,7,11-trimethyldodeca-1,6,10-trien-3-ol: 5 wt% 2-Ethoxynaphthalene: 10 wt% 1-(3-methylbenzofuran-2-yl)ethanone: 5 wt% (Z)-3,7-dimethylocta-2,6-diene-1-yl acetate: 5 wt% (2E,6Z)-nona-2,6-dienal: 0.5wt% (Z)-non-6-enal: 0.5 wt% (Z)-nona-6-en-1-ol: 0.5 wt% 3-(4-(2-methylpropyl)-2-methylphenyl)propanal: 25 wt% 6-Propyltetrahydro-2H-pyran-2-one: 1 wt% 1-(2-naphthalenyl)-ethanone: 10 wt% 4-(tert-butyl)cyclohexyl acetate: 50 wt% 5-Heptyldihydrofuran-2(3H)-one: 25 wt% 3,7-dimethyloctan-1-ol: 10 wt% 2-Phenylethyl acetate: 15 wt% 2,6,6-Trimethylbicyclo[3.1.1]hepta-2-ene: 2 wt% 6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane: 2 wt% (2E,5E)-5,6,7-trimethylocta-2,5-dien-4-one: 2 wt% 2,4,7-trimethyl-6-octen-1-ol: 2 wt% 3-Methylbuta-2-en-1-yl acetate: 10 wt% 5-Pentyldihydrofuran-2(3H)-one: 5 wt% 4-(4-hydroxyphenyl)butan-2-one: 5 wt% Deca-9-en-1-all: 2 wt% 4-Methyl-2-(2-methylpropane-1-en-1-yl)tetrahydro-2H-pyran: 2 wt% 4-methyl-2-phenyl-3,6-dihydro-2H-pyran: 2 wt% 2,6,6-Trimethylcyclohexa-1,3-dienecarbaldehyde: 0.5 wt% 4-(dodecylthio)-4-methylpentan-2-one: 0.5 wt% 2-Methyl-3-[4-(2-methylpropyl)phenyl]propanal: 5 wt% 1-Phenylethyl acetate: 5 wt% (E)-2-((3,5-dimethylhexa-3-en-2-yl)oxy)-2-methylpropylcyclopropanecarboxylate: 5 wt% 1-Methyl-4-propane-2-ylcyclohexa-1,4-diene: 5 wt% 2-(4-methylcyclohexa-3-en-1-yl)propan-2-ol: 5 wt% 1-Methyl-4-(propane-2-ylidene)cyclohexa-1-ene: 15 wt% 3,7-dimethyloctan-3-ol: 50 wt% 1-(cyclopropylmethyl)-4-methoxybenzene: 10 wt% (E)-Trideca-2-ennitrile: 15 wt% 3-Phenylbutanal: 5 wt% 3-(benzo[d][1,3]dioxol-5-yl)-2-methylpropanal: 5 wt% (E)-4-methyldeca-3-en-5-ol: 25 wt% 2-Methoxynaphthalene: 15 wt% Cedarwood oil: 5 wt% Eucalyptus oil: 25 wt% Galbanum oil: 2 wt% Clove oil: 5 wt% Lavandin oil: 25 wt% Mandarin oil: 5 wt% Orange terpene: 50 wt% Patchouli oil: 10 wt% Iranian oil: 5 wt%.

2. The encapsulated composition according to claim 1, wherein each of the biodegradable components (one or more) is present at a concentration equal to or higher than a minimum concentration of 0.01 wt%.

3. The encapsulated composition according to claim 1 or 2, wherein the weight ratio of the core to the total weight of the capsule, i.e., the sum of the weight of the core and the weight of the shell, is at least 60 wt%.

4. An encapsulated composition according to any one of claims 1 to 3, wherein the shell comprises a melamine-formaldehyde polymer.

5. An encapsulated composition according to any one of claims 1 to 3, wherein the shell comprises polyurea or a polyurethane polymer.

6. The encapsulated composition according to any one of claims 1 to 3, wherein the shell comprises a polymer stabilizer formed by a combination of at least one aminosilane polymer surfactant.

7. The encapsulated composition according to claim 6, wherein the shell further comprises a polysaccharide.

8. The encapsulated composition according to any one of claims 1 to 3, wherein the shell comprises a complex coacervate formed from at least one protein and at least one polysaccharide.

9. The encapsulated composition according to claim 8, wherein the shell is formed by crosslinking at least one protein with a first crosslinking agent to form a simple coacervate, and subsequently by adding at least one polysaccharide to form a complex coacervate.

10. The encapsulated composition according to any one of claims 1 to 3, wherein the shell comprises, in its polymerized form, one or more monoethylene unsaturated and / or polyethylene unsaturated monomers.

11. A consumer product comprising the encapsulated composition according to any one of claims 1 to 10.

12. Use for obtaining a consumer product of the encapsulated composition according to any one of claims 1 to 10.

Images