Evaporating microemulsions

Abstract

The present invention relates to a diffusible microemulsion comprising a non-aqueous and an aqueous phase, to a method for obtaining such a microemulsion, to a method for air scenting applying such a microemulsion, to a use of such a microemulsion, and to a scent kit comprising such a microemulsion.

Description

[0001] Eisenfuhr Speiser

[0002] Munich, 7 August 2025

[0003] Our Ref.: SM 7002-02WO SOE / DRE

[0004] Applicant: Symrise AG serial Number: Subsequent Application to PCT / EP2024 / 074013

[0005] Symrise AG

[0006] MiihlenfeldstraBe 1 , 37603 Holzminden

[0007] Evaporating microemulsions

[0008] The present invention relates to a diffusible microemulsion comprising a non-aqueous and an aqueous phase, to a method for obtaining such a microemulsion, to a method for air scenting applying such a microemulsion, to a use of such a microemulsion, and to a scent kit comprising such a microemulsion.

[0009] 5 Microemulsions comprising perfume oils are commonly used for several products, with which a smell shall be imparted. Such products can be home care products, such as air fresheners, cleaners or fabric aids, but also body care products, such as body sprays, deodorants, or perfumes.

[0010] Usually, such products are based on ecological harmful solvents with which the perfume0 oils are dissolved. However, since these solvents are ecologically harmful and also rather expensive, such solvents should be avoided.

[0011] Additionally, there is a requirement for water-based systems in the respective industries. However, water-based systems usually have a low perfume content, since perfume oils often have a low water solubility. To increase the perfume content with a stable dissolution5 and thus to increase the provided smell, high amounts of solvents would be required with such systems. Such high amounts of solvents were found to negatively interfere with the respective product. For example, air fresheners are usually clogged after short use due to the high solvent content.

[0012] EP 4 314 195 A1 describes microemulsions comprising perfume oils, which are based on

[0013] 1 ,2-pentane diol. It was found that these microemulsions provided a comparable and fast evaporation as common systems. Fast evaporation is desired for a sufficient or, respectively, sufficiently fast, provision of a smell, which shall be imparted by the respective product. Even though these microemulsions already showed a fast evaporation, it is always desired to further improve the evaporation performance of a system.

[0014] The primary object of the present invention was thus to provide improved systems with advantageous amounts of perfume oils, preferably with a high solubility or, respectively, low turbidity, and particularly preferably a fast evaporation.

[0015] The primary object is solved by a microemulsion comprising a non-aqueous and an aqueous phase, wherein the non-aqueous phase comprises or consists of a) one or more perfume oil(s), b) one or more non-ionic solubilizer(s), c) one or more solvent(s) selected from the group consisting of 3-methoxy-3-methyl-1- butanol (MMB), dipropyleneglycol methyl ether (DPM), dipropylene glycol methyl ether acetate (DPMA), and d) one or more solvent(s) selected from the group consisting of 1 ,2-propylenglycol, diethylene glycol, 1 ,3-propandiol, butane diol, hexane diol, octane diol, ethylene glycol,

[0016] 2.2-dimethyl-1 ,3-dioxolan-4-ylmethanol (Augeo clean Multi), (2-isobutyl-2-methyl-

[0017] 1 .3-dioxolan-4-yl)methanol (Augeo clean plus), 2,2-dimethyl-1 ,3-dioxolan-4- ylmethanol (Augeo crystal).

[0018] Surprisingly, it was found that the microemulsions according to the invention showed a very fast evaporation, particularly a faster evaporation than the microemulsions disclosed in EP 4 314 195 A1 . However, at the same time, the evaporation was not too fast, such that with the microemulsions according to the invention, an advantageous air scenting product can be provided.

[0019] Further surprisingly, it was found that the solvents c) and d) showed the best solubility (a particularly low turbidity) of the perfume oils, even a higher solubility than the microemulsions disclosed in EP 4 314 195 A1 .

[0020] It was further surprisingly found that the microemulsions according to the invention are less sticky on the skin as usual formulas, which are currently on the market. The microemulsions according to the invention can thus be advantageously used in home care or body care products, as described herein.

[0021] Furthermore, it was surprisingly found that the microemulsions evaporate faster than similar microemulsions but with dipropylene glycol (DPG) as solvent.

[0022] Preferably, the term “microemulsion”, as used herein refers to an emulsion, with an average particle size (mean particle size, based on the number of particles) of at most 1000 nm, preferably at most 750 nm, particularly preferably at most 500 nm, further preferably at most 350 nm.

[0023] Preferably, the term “microemulsion”, as used herein refers to an emulsion, with an average particle size (mean particle size, based on the number of particles) of at least 100 nm, preferably at least 150 nm.

[0024] Preferably, the microemulsion according to the invention is a diffusible microemulsion.

[0025] Preferably, the term “diffusible microemulsion”, as used herein, refers to a microemulsion, which is capable of diffusing a stick, preferably made from reed, paper or plastic, and preferably of being released from the stick e.g. by evaporation.

[0026] Preferably, the microemulsion according to the invention is liquid, preferably liquid at a temperature in the range of from 20 to 30 °C and / or at a pressure of 1013 mbar.

[0027] Preferably, the solvent c) is or comprises dipropyleneglycol methyl ether (DPM).

[0028] Preferably, the solvent c) is or comprises 3-methoxy-3-methyl-1 -butanol (MMB). Preferably, the solvent c) is or comprises dipropylene glycol methyl ether acetate (DPMA).

[0029] Preferably, the solvent c) is not or does not comprise dipropyleneglycol (DPG).

[0030] Preferably, the solvent d) is or comprises octane diol, preferably 1 ,2-octane diol.

[0031] Preferably, the solvent d) is or comprises 1 ,2-propylene glycol.

[0032] Preferably, the solvent d) is or comprises diethylene glycol.

[0033] Preferably, the solvent d) is or comprises 1 ,3-propane diol.

[0034] Preferably, the, one, two, three or more or all perfume oil(s) a) in the microemulsion according to the invention is / are selected from the group consisting of extracts of blossoms (lily, lavender, rose, jasmine, neroli, ylang-ylang), stems and leaves (geranium, patchouli, petitgrain), fruits (anise, coriander, caraway, juniper), fruit peel (bergamot, lemon, orange), roots (nutmeg, angelica, celery, cardamom, costus, iris, calmus), woods (pinewood, sandalwood, guaiac wood, cedarwood, rosewood), herbs and grasses (tarragon, lemon grass, sage, thyme), needles and branches (spruce, fir, pine, dwarf pine), resins and balsams (galbanum, elemi, benzoin, myrrh, olibanum, opoponax).

[0035] Additionally or alternatively, it is preferred that the, one, two, three or more or all perfume oil(s) in the microemulsion according to the invention is / are essential oils, preferably selected from the group consisting of Ambrette Seed Absolue (preferably defined with the I a CAS number of 8015-62-1 ; 84455-19-6); Amyris Oil (preferably defined with the I a CAS number of 8015-65-4; 90320-49-3); Angelica Root Oil (preferably defined with the I a CAS number of 8015-64-3; 84775-41-7); Apricot Seed Oil (preferably defined with the I a CAS number of 68650-44-2; 72869-69-3); Artemisia Oil (preferably defined with the I a CAS number of 8022-37-5; 84775-75-7; 68991-20-8); Basil Oil (preferably defined with the I a CAS number of 8015-73-4; 84775-71-3); Bay Oil (preferably defined with the I a CAS number of 8006-78-8; 85085-61-6); Beeswax Abs (preferably defined with the I a CAS number of 8012-89-3); Benzoin Resinoid (preferably defined with the / a CAS number of 9000-05- 9; 9000-72-0); Bergamot Oil (preferably defined with the I a CAS number of 8007-75-8; 89957-91-5; 68648-33-9); Boya (preferably defined with the I a CAS number of 958663- 49-5); Cabreuva Oil (preferably defined with the I a CAS number of 68188-03-4; 91722-93- 9); Cade Oil (preferably defined with the I a CAS number of 8013-10-3; 90046-02-9); Cananga Oil Java (preferably defined with the / a CAS number of 68606-83-7; 93686-30- 7); Caraway Oil (preferably defined with the / a CAS number of 8000-42-8; 85940-31-4); Cardamom Abs. / Oil (preferably defined with the I a CAS number of 8000-66-6; 85940-32-

[0036] 5); Carrot Seed Oil (preferably defined with the I a CAS number of 8015-88-1 ; 84929-61- 3); Cassia Oil (preferably defined with the I a CAS number of 8007-80-5; 84961-46-6); Cassie Abs. A Egypt (preferably defined with the I a CAS number of 8023-82-3; 89958-31 -

[0037] 6); Cassis Abs. Burgundy (preferably defined with the I a CAS number of 68606-81-5; 97676-19-2); Castroreum Abs. (preferably defined with the I a CAS number of 8023-83-4; 92704-04-6); Cedar Leaf Oil (preferably defined with the I a CAS number of 8007-20-3; 90131-58-1); Cedarwood Oil (preferably defined with the I a CAS number of 68990-83-0; 91722-61-1); Cedarwood Oil (preferably defined with the I a CAS number of 8000-27-9; 85085-29-6; 85085-41-2); Cedarwood Oil Atlas (preferably defined with the I a CAS number of 8023-85-6; 92201-55-3); Celery Seed Oil (preferably defined with the I a CAS number of 8015-90-5; 89997-35-3); Chamomile Oil Blue (preferably defined with the I a CAS number of 8002-66-2; 84082-60-0); Chamomile Oil Roman (preferably defined with the I a CAS number of 8015-92-7; 84649-86-5); Cinnamon Bark Oil (preferably defined with the I a CAS number of 8015-91-6; 84649-98-9); Cinnamon Leaf Oil (preferably defined with the I a CAS number of 8015-91-6; 84649-98-9); Cistus Labdanum Abs. SIS (preferably defined with the I a CAS number of 8016-26-0; 89997-74-0); Cistus Oil (preferably defined with the I a CAS number of 8016-26-0; 89997-74-0); Citronella Oil Formosa / Java (preferably defined with the I a CAS number of 8000-29-1 ; 91771-61-8); Clary Sage Oil (preferably defined with the I a CAS number of 8016-63-5; 84775-83-7); Clove Bud Oil (preferably defined with the I a CAS number of 8000-34-8; 84961-50-2; 97-53-0); Clove Leaf Oil (preferably defined with the / a CAS number of 8000-34-8; 84961-50-2; 97-53-0); Coconut Oil (preferably defined with the I a CAS number of 8001-31-8); Copaiba Balsam Oil (preferably defined with the I a CAS number of 8001-61-4); Coriander Oil (preferably defined with the I a CAS number of 8008-52-4; 84775-50-8); Cumin Oil (preferably defined with the I a CAS number of 8014-13-9; 84775-51-9); Cypress Oil (preferably defined with the I a CAS number of 8013-86-3; 84696-07-1); Cypriol Oil (preferably defined with the I a CAS number of 68916-60-9; 91771-62-9); Davana Oil (preferably defined with the / a CAS number of 8016- 03-3; 91844-86-9); Dill Weed Oil (preferably defined with the I a CAS number of 8006-75- 5; 90028-03-8); Dynamone (preferably defined with the I a CAS number of 8016-26-0; 89997-74-0); Elemi Oil I Gum (preferably defined with the I a CAS number of 8023-89-0; 9000-75-3); Estragon Oil (preferably defined with the / a CAS number of 8016-88-4; 90131- 45-6); Eucalyptus Oil Citriodora (preferably defined with the I a CAS number of 8000-48-4; 85203-56-1); Fennel Oil Sweet (preferably defined with the I a CAS number of 8006-84-6; 84455-29-8); Fir Balsam Abs. (preferably defined with the / a CAS number of 8007-47-4); Fucus Abs. (preferably defined with the / a CAS number of 68917-51-1 ; 84696-13-9); Galbanum Oil (preferably defined with the I a CAS number of 8023-91-4; 93165-40-3); Geranium Oil (preferably defined with the I a CAS number of 8000-46-2; 90082-51-2); Ginger Extract / Oil (preferably defined with the I a CAS number of 8007-08-7; 84696-15-1); Grape- friut Oil White (preferably defined with the I a CAS number of 8016-20-4; 90045-43-5); Guaiac Wood Oil (preferably defined with the I a CAS number of 8016-23-7; 89958-10-1); Gurjun Balsam Oil (preferably defined with the I a CAS number of 8030-55-5); Hay Abs (preferably defined with the I a CAS number of 8031-00-3; 92128-62-6); Hydrocarboresin B (preferably defined with the / a CAS number of 8016-26-0; 89997-74-0); Immortelle Abs. (preferably defined with the I a CAS number of 8023-95-8; 90045-56-0); Jasmin Abs. (preferably defined with the I a CAS number of 8022-96-6; 90045-94-6); Jasmin Abs. Sambac (preferably defined with the I a CAS number of 1034798-23-6; 91770-14-8); Juniper Berry Oil R.S (preferably defined with the I a CAS number of 8002-68-4; 84603-69-0); Labdanum Abs. I Resinoide (preferably defined with the I a CAS number of 8016-26-0; 89997-74-0); Laurel Noble Leaf Oil FLS (preferably defined with the I a CAS number of 8002-41-3; 84603-73-6); Lavandin Oil (preferably defined with the I a CAS number of 8022-15-9; 91722-69-9); Lavender Oil White (preferably defined with the I a CAS number of 8000-28- 0; 90063-37-9); Lemon Oil (preferably defined with the I a CAS number of 8008-56-8; 84929-31-7); Lemon Oil Terpenes (preferably defined with the I a CAS number of 68917- 33-9; 84929-31-7); Lemon Oil Winter (preferably defined with the I a CAS number of 8008- 56-8; 84929-31-7); Lemongrass Oil (preferably defined with the I a CAS number of 8007- 02-1 ; 91844-92-7); Lentisque Abs. (preferably defined with the I a CAS number of 61789- 92-2; 68991-39-9; 90082-82-9); Lime Oil (preferably defined with the I a CAS number of 8008-26-2; 90063-52-8); Lime Oil Terpenes (preferably defined with the I a CAS number of 68917-71-5; 90063-52-8); Litsea Cubeba Oil (preferably defined with the I a CAS number of 68855-99-2; 90063-59-5); Longoza Oil (preferably defined with the I a CAS number of 97952-46-0); Lovage Root Oil (preferably defined with the I a CAS number of 8016-31-7; 84837-06-9); Mace Oil Dist. Low Safrol (preferably defined with the I a CAS number of 8008-45-5; 84082-68-8); Mace Oil (preferably defined with the I a CAS number of 8007- 12-3; 84082-68-8); Magnolia Flower Oil (preferably defined with the I a CAS number of 8006-76-6; 92457-18-6); Magnolia Leaf Oil (preferably defined with the I a CAS number of 8006-76-6; 92457-18-6); Mandarin Oil (preferably defined with the I a CAS number of 8008- 31-9; 84929-38-4); Marjoram Oil (preferably defined with the I a CAS number of 8015-01- 8; 84082-58-6); Mentha Arv. Oil (preferably defined with the I a CAS number of 68917-18- 0; 90063-97-1); Mimosa Abs. (preferably defined with the I a CAS number of 8031-03-6; 93685-96-2; 98903-76-5); Mousse C Abs. (preferably defined with the I a CAS number of 9000-50-4; 90028-68-5); Myrrh Oil (preferably defined with the / a CAS number of 8016- 37-3; 84929-26-0); Myrtle Oil (preferably defined with the / a CAS number of 8008-46-6; 84082-67-7); Narcisse Abs. (preferably defined with the I a CAS number of 68917-12-4; 90064-26-9); Neroli Oil (preferably defined with the I a CAS number of 72968-50-4; 8016-

[0038] 38-4); Nutmeg Oil (preferably defined with the I a CAS number of 8008-45-5; 84082-68-8); Olibanum Oil (preferably defined with the I a CAS number of 8016-36-2; 8050-07-5); Opoponax Oil I Resinoid (preferably defined with the I a CAS number of 100084-96-6; 8021-36-1); Orange Flower Abs. (preferably defined with the I a CAS number of 68916-04- 1 ; 72968-50-4); Orange Oil (preferably defined with the I a CAS number of 8008-57-9; 8028-48-6; 68916-04-1 ; 72968-50-4); Origanum Oil (preferably defined with the I a CAS number of 336185-21-8; 84012-24-8); Osmanthus Abs. (preferably defined with the / a CAS number of 68917-05-5; 92347-21-2); Palmarosa Oil (preferably defined with the I a CAS number of 8014-19-5; 84649-81-0); Parsley Leaf Oil (preferably defined with the I a CAS number of 8000-68-8; 84012-33-9); Parsley Seed Oil (preferably defined with the I a CAS number of 8000-68-8; 84012-33-9); Patchouli Oil (preferably defined with the I a CAS number of 8014-09-3; 84238-39-1); Pepper Black Oil (preferably defined with the I a CAS number of 8006-82-4; 84929-41-9); Pepper Oil / Abs. Sichuan Type (preferably defined with the I a CAS number of 102242-62-6; 97404-53-0); Peppermint Oil (preferably defined with the I a CAS number of 8006-90-4; 84082-70-2); Peru Balsam Oil (preferably defined with the I a CAS number of 8007-00-9); Petitgrain Bigaeade Abs. (preferably defined with the I a CAS number of 72968-50-4; 8014-17-3); Petitgrain Oil Citronnier (preferably defined with the I a CAS number of 8048-51-9; 84929-31-7); Pimento Leaf Oil (preferably defined with the / a CAS number of 8006-77-7; 84929-57-7); Pine Needle Abs. (preferably defined with the I a CAS number of 8023-99-2; 84012-35-1); Pine Needle Oil (preferably defined with the I a CAS number of 8021-29-2; 91697-89-1 ; 8021-28-1 ; 85085-34-3); Pink Pepper Leaf Oil (preferably defined with the I a CAS number of 1175539-64-6; 949495-68-5); Red Berry Extract (preferably defined with the I a CAS number of 949495-68-5); Red Berry Oil (preferably defined with the I a CAS number of 68917-52-2; 94334-31-3); Rose Abs. (preferably defined with the I a CAS number of 8007-01-0; 90106-38-0; 97660-07-6; 84604-12-6); Rosemary Oil (preferably defined with the I a CAS number of 8000-25-7; 84604-14-8); Rum CO2 Extract (preferably defined with the I a CAS number of 91770-72-8; 943609-24-3); Sage Officinale Oil Dalm (preferably defined with the I a CAS number of 8022-56-8; 84082- 79-1); Sandalwood Oil (preferably defined with the I a CAS number of 8024-35-9; 92875- 02-0; 1070895-66-7; 91845-48-6; 8006-87-9; 84787-70-2); Spearmint Oil (preferably defined with the I a CAS number of 8008-79-5; 84696-51-5); Spike Oil (preferably defined with the I a CAS number of 8016-78-2; 84837-04-7); Star Anise Oil (preferably defined with the I a CAS number of 68952-43-2; 84650-59-9); Styrax Oil (preferably defined with the I a CAS number of 8046-19-3; 94891-28-8); Sweet Almond Oil (preferably defined with the / a CAS number of 8007-69-0; 90320-37-9); Tagetes Oil (preferably defined with the / a CAS number of 8016-84-0; 91770-75-1); Tangerine Cravo Oil Brazil (preferably defined with the I a CAS number of 8016-85-1 ; 93686-22-7); Tea Tree Oil (preferably defined with the I a CAS number of 68647-73-4; 85085-48-9); Thuja Oil (preferably defined with the I a CAS number of 8007-20-3; 91770-83-1); Thyme Oil (preferably defined with the I a CAS number of 8007-46-3; 85085-75-2); Timut Pepper Oil (preferably defined with the I a CAS number of 102242-62-6; 91770-90-0); Tonka Bean Abs. (preferably defined with the I a CAS number of 8024-04-2; 90028-06-1); Tuberose Abs. (preferably defined with the I a CAS number of 8024-05-3; 94334-35-7); Tumeric Oil (preferably defined with the I a CAS number of 8024-37-1 ; 84775-52-0); Turpentine Oil (preferably defined with the I a CAS number of 8006-64-2); Vanilla Abs (preferably defined with the I a CAS number of 8024-06-4; 84650- 63-5); Vetiver Oil / Abs (preferably defined with the I a CAS number of 8016-96-4; 84238- 29-9); Violet Leaves Abs. (preferably defined with the I a CAS number of 8024-08-6; 90147- 36-7); Wheat Bran Abs. (preferably defined with the I a CAS number of 68916-76-7; 84012- 44-2); Wormwood Oil (preferably defined with the I a CAS number of 8008-93-3; 84929- 19-1); and Ylang Ylang Oil (preferably defined with the I a CAS number of 8006-81-3; 83863-30-3).

[0039] Additionally or alternatively, it is preferred that the, one, two, three or more or all perfume oil(s) in the microemulsion according to the invention is / are selected from the group consisting of acetals, alcohols, aldehydes, amines, amides, nitriles, esters, ethers, ketones, lactones, terpenes, oils, and extracts.

[0040] Preferably, the, one, two, three or more or all acetal(s) in the perfume oil is / are selected from the group consisting of 6,6-dimethoxy-2,5,5-trimethylhex-2-ene (67674-46-8; Ama- rocit); ethoxymethoxycyclododecane (58567-11-6; Amberwood); (4aR,5R,7aS,9R)-Oc- tahydro-2,2,5,8,8,9ahexamethyl-4H-4a,9-methanoazuleno[5,6-d]- 1 ,3-dioxole (211299-54- 6; Ambrocenide); 4H-4a,9-Methanoazuleno[5,6-d]-1 ,3-dioxole, octahydro-2, 5,8,8, 9a-pen- tamethyl-2-propyl-, (3aS,4aR,5R,7aS,9R,9aR) (1357064-95-9; Ambrostar); 2,4,6-trime- thyl-4-phenyl-1 ,3-dioxane (5182-36-5; Floropal); 4,4a,5,9b-tetrahydro-2,4-dimethyl-in- deno[1 ,2-d]-1 ,3-dioxin (27606-09-3; Magnolan); hexahydro-T,T,5',5'-tetramethyl-spiro[1 ,3- dioxolane-2,8'(5'H)-[2H-2,4a]methanonaphthalene] (154171-76-3; 154171-77-4; Ysam- ber), Citral diethyl acetal; and dimethyl acetal phenylacetaldehyde.

[0041] Preferably, the, one, two, three or more or all alcohol(s) in the perfume oil is / are selected from the group consisting of 1-(2-tert-butylcyclohexyl)oxybutan-2-ol (139504-68-0; Amber core); 2,6-di-tert-butyl-p-cresol (128-37-0; BHT Ionol); (Z)-3-methyl-5-(2,2,3-trimethyl-1-cy- clopent-3-enyl)pent-4-en-2-ol (67801-20-1 ; Ebanol); 4-methyl-2-(2-methylpropyl)oxan-4-ol (63500-71-0; Florosa / Pyranol); [(1 R,2S)-1-methyl-2-[[(1 R,3S,5S)-1 ,2,2-trimethyl-3-bicy- clo[3.1 .0]hexanyl]methyl]cyclopropyl]methanol (198404-98-7; Javanol); (3R)-1-[(1 R,6S)- 2,2,6-trimethylcyclohexyl]hexan-3-ol; (3S)-1 -[(1 R,6S)-2,2,6-trimethylcyclohexyl]hexan-3-ol (70788-30-6; Norlimbanol); 3-methyl-5-phenylpentan-1-ol (55066-48-3; Phenoxanol); (E)- 3,3-dimethyl-5-(2,2,3-trimethyl-3-cyclopenten-1-yl)-4-penten-2-ol (107898-54-4; Polysan- tol); 5-(3-methylphenyl)pentan-1-ol (25634-93-9; Rosaphen); 3-methyl-5-(2,2,3-trimethyl- cyclopent-3-en-1-yl)pentan-2-ol (1471313-03-7; 65113-99-7; Sandalore); (2E)-2-ethyl-4- (2,2,3-trimethyl-3-cyclopenten-1-yl)-buten-1-ol + 2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten- 1-yl)-2-buten-1-ol (106185-75-5; 28219-61-6; Sandranol); (E)-4-methyldec-3-en-5-ol (81782-77-6; Undecavertol); 3-[5,5,6-T rimethylbicyclo[2.2.1 ]hept-2-yl]cyclohexan-1 -ol (70955-71-4; Sandela), hexan-1-ol; octan-1-ol; decan-1-ol; dodecan-1-ol; Borneol; Isoborneol; Carvacrol; Citronellol; L-Citronellol; Dihydro Eugenol; Dihydro Myrcenol; Dimethyl Benzyl Carbinol; Ethyl Linalool; Eucalyptol; Eugenol; Geraniol; Cis-3-Hexenol; Isobornyl Cyclohexanol; Linalool; Menthol; Nerolidol; Nerol, Phenylethyl alcohol; Phenylethyl Dimethyl Carbinol; Phenylpropyl Alcohol; Propenyl Guaethol; Sulfurol; alpha-Terpineol; Tetrahydro Linalool; Thymol; Benzylalcohol; Bisabolole; Borneole; Fenchole; Isopulegole; Terpin- eole; Verbenole; Ambrein; Aphidicolin; Betulin; Cadinol; Carveol; Cavacrol; Cedrol; p-Cre- sol; Cubebol; Cuminalkohol; Cycloartenol; Dihydrocarveol; Elemol; Farnesol; Geranylgeraniol; 1 -Hexanol; Hexenol; Ipsdienol; Isophytol; Isopulegol; Khusimol; Lanosterin; Ledol; Lu- peol; Myrcenol; Nerol; Perillaalkohol; Phenylethylalkohol; Phytol; Rhodinol; Sclareol; Spathulenol; and Terpineol.

[0042] Preferably, the, one, two, three or more or all aldehyde(s) in the perfume oil is / are selected from the group consisting of 2,6,10-trimethylundec-9-enal (141-13-9; Adoxal; Farenal); alpha-, 3, 3-trimethyl-cyclohexanemethanolformate (25225-08-5; Aphermate); 4-(1 , 1-di- methylethyl)-benzenepropanal (18127-01-0; Bourgeonal); 6-methoxy-2,6-dimethyloctanal (929253-05-4; Calypsone); 4-methoxy-. alpha. -methyl-benzenepropanal (5462-06-6; Canthoxal); a,2,2,6-tetramethylcyclohexenebutanal (65405-84-7; Cetonal); 8,8-dimethyl- 1 ,2,3,4,5,6,7,8-octahydro-2-naphthaldehyde + 1 ,2,3,4,5,6,7,8-octahydro-5,5-dimethyl-2- naphthalenecarboxaldehyde (68991-96-8; 68991-97-9; Cyclomyral); 4-(octahydro-4,7- methano-5H-inden-5-ylidene butanal (30168-23-1 ; Dupical); 4,8-dimethyl-4,9-decadienal (71077-31-1 ; Floral Super); 3-(4-ethylphenyl)-2,2-dimethylpropanal + 3-(2-ethylphenyl)- 2,2-dimethylpropanal (67634-15-5; 67634-14-4; Florazon); beta-methyl-3-(1-methylethyl)- benzenepropanal (12509-85-5; Florhydral); methylenedioxyphenyl-methylpropanal (1205- 17-0; Helional); a,4-dimethylbenzenepropanal (41496-43-9; Jasmorange, Satinaldehyde); (Z,E)-2,4-dimethyl cyclohex-3-ene-1-carbaldehyde (68039-49-6; 68737-61-1 ; Ligustral, Tripalal, Cyclal C, Vertocitral) ; 3-(4-tert-butylphenyl)butanal (80-54-6; Lilial); (1 R)-p,4-di- methyl-3-cyclohexene-1-propanal (199445-85-7; Liminal); (4R)-4-(1-Methylethyl)-1-cyclo- hexene-1-propanal (1378867-81-2; Lilybelle); (4S)-4-(1-Methylethyl)-1-cyclohexene-1-pro- panal (1378867-82-3; Lilybelle Isomer); 4-(4-Hydroxy-4-methyl-pentyl)-3-cyclohexen-1- carboxyaldehyde (130066-44-3; Lyral); 6-methyl-1-8-yl-methyleth l-bicyclo[2.2.2]oct-5- ene-2-carboxaldehyde (67845-30-1 ; Maceal); (±)-2,6-Dimethyl-5-heptenal (106-72-9; Melonal); (E)-2,6,10-trimethylundeca-5,9-dienal (54082-68-7; Oncidal); 6,6-Dimethyl-2-nor- pinene-2-propionaldehyde (33885-51-7; Pinoacet aldehyde); 1-methyl-4-(4-methyl-3-pen- tenyl)cyclohex-3-ene-1 -carboxaldehyde + 6,6-dimethyl-2-norpinene-2-propionaldehyde (119652-81-2; 52475-86-2; Precyclemone B); 3-phenylbutanal (16251-77-7; Trifernal); oc- tahydro-5-methoxy-4,7-methano-1 H-indene-2-carboxaldehyde (86803-90-9; Scentenal); rel-(3aR,4R,5R,7R,7aR)-octahydro-4,7-methano-1 H-indene-5-carboxaldehyde (145374- 28-3; Vertral); 4-(4-methyl pent-3-enyl) cyclohex-3-ene-1-carbaldehyde (37677-14-8; Vertomugal); 1-Hexanal; 1-Heptanal; Octanal; 2-Nonen-1-al; Nonanal; Decanal; Unde- cenal; 2-Methyldecanal; Dodecanal; 2-Methylundecanal; Anisic Aldehyde; Benzaldehyde; Citral; Citronellal; Cinnamaldehyde; Cuminic Aldehyde; Cyclamen aldehyde; Dihydrocitron- ellal; trans-2-dodecenal; Ethyl Vanillin; Geranial; Heliotropin / Piperonal; Hexyl Cinnamaldehyde; trans-2-hexenal; Alpha-hexyl-cinnamic aldehyde; Hydratropic Aldehyde; Hxdroxy Citronellal; Isocyclocitral; Methoxycitronellal; Methyl cinnamaldehyde; Neral; Phenylacetaldehyde; Tangerinal; Cyclamen Homoaldehyde; and Vanillin.

[0043] Preferably, the, one, two, three or more or all amine(s) and / or amide(s) and / or nitrile(s) in the perfume oil is / are selected from the group consisting of 3,7-dimethyloct-6-enenitrile (51566-62-2; Argunitril); (E / Z)-3-methyl-5-phenylpent-2-enenitrile (53243-59-7; 53243-60- 0; 93893-89-1 ; Citronitrile); 3,7-dimethylnona-2,6-dienenitrile (61792-11-8; Lemonile); 4- [(3E)-4,8-dimethylnona-3,7-dienyl]pyridine (38462-23-6; Maritima); tridec-2-enenitrile (22629-49-8; Ozonil); 2-cyclohexylidene-2-phenylacetonitrile (10461-98-0; Peonile); 5-me- thyl-3-heptanoneoxime (22457-23-4; Stemone); and indole.

[0044] Preferably, the, one, two, three or more or all ester(s) in the perfume oil is / are selected from the group consisting of cis-2-tert-butylcyclohexyl acetate + (2-tert-butylcyclohexyl) acetate (20298-69-5; 88-41-5; Argumex HC I LC); ethyl 3-methyl-3-phenyloxirane-2-carboxylate (77-83-8; Aldehyde C16 so-called); prop-2-enyl 2-cyclohexyloxyacetate (68901-15-5; Cy- clogalbanat); methyl 2,4-dihydroxy-3,6-dimethylbenzoate (4707-47-5; Evernyl); 4- methylpentan-2-yl (E)-but-2-enoate (35206-51-0; Frutinat); ethyl 2-ethyl-6,6-dimethylcyclo- hex-2-ene-1 -carboxylate (57934-97-1 ; 77851-07-1 ; Givescone); methyl 3-oxo-2-pentylcy- clopentaneacetate (24851-98-7; Hedione); 2-(1-(3',3'-dimethyl-1 '-cyclohexyl)ethoxy)-2- methyl propyl propanoate (141773-73-1 ; Helvetolide); 3a,4,5,6,7,7a-hexahydro-4,7-meth- anoinden-6-yl acetate (5413-60-5; Herbalflorat); 3a,4,5,6,7,7a-hexahydro-4,7-metha- noinden-6-yl acetate (5413-60-5; Herbalflorat); [(Z)-hex-3-enyl] methyl carbonate (67633- 96-9; Leafovert); ethyl 2-methylpentanoate (39255-32-8; Manzanate); 4-tert-Butylcyclo- hexyl acetate (32210-23-4; Oryclon Spezial; Woody acetate); 2-(phenoxy)ethyl 2- methylpropanoate (103-60-6; Phenirat); 2-[1-(3,3-Dimethylcyclohexyl)ethoxy]-2-oxoethyl propionate (236391-76-7; Romandolide); ethyl 2-cyclopent-2-en-1-ylacetate (15848-49-4; Sultanene); (1 S,2R,5S)-5-methyl-2-(1-methylethyl)-cyclohexanolacetate + [(1 R,2S,5R)-5- methyl-2-propan-2-ylcyclohexyl]-acetate (29066-34-0; 89-48-5; Symfresh RF I Menthylacetate); 3-hydroxy-2,2,4-trimethylpentyl 2-methylpropanoate (25265-77-4; Symfresh NX); (4-methyl-4-phenylpentan-2-yl)-acetate (68083-58-9; Vertikolacetat); Allyl Amyl Glycolate; Allyl Caproate; Allyl Cyclohexyl Propionate; Allyl Heptoate; Benzyl Acetate; Benzyl Salicylate; Citronellyl Acetate; Dimethyl Benzyl Carbinyl Acetate ; Dimethyl Benzyl Carbinyl Butyrate; Cedryl Acetate; Ethyl Butyrate; Ethyl Caproate; Trans / Cis-2,4-Ethyl Decadienoate; Ethyl acetoacetate; Ethyl-2-Methyl Butyrate; Ethylene Brassylate ; Geranyl Acetate; Herbyl Propionate; Cis / Trans-3-Hexenyl Acetate; Cis-3 Hexenyl Acetate; Cis-3 Hexenyl Butyrate; Cis-3-Hexenyl Isobutyrate; Cis-3-Hexenyl Salicylate; Hexyl Acetate; Hexyl Butyrate; Hexyl Isobutyrate; Hexyl Salicylate; Isoamyl Acetate; Isobornyl Acetate; Isobutyl Acetate; Isoeugenyl Acetate; Linalyl Acetate; Methyl cinnamate; Methyl Octin Carbonate; Neryl Acetate; Nopyl Acetate; Phenylethyl Butyrate; Phenylethyl Cinnamate; Prenyl Acetate; Styralyl Acetate; and Methylanthranilat.

[0045] Preferably, the, one, two, three or more or all ether(s) in the perfume oil is / are selected from the group consisting of (3aR,5aS,9aS,9bR)-3a,6,6,9a-tetramethyl-2,4,5,5a,7,8,9,9b- octahydro-1 H-benzo[e][1]benzofuran (6790-58-5; Ambroxide); 5-hexyl-4-methyloxolan-2- one (67663-01-8; Aprifloren); cyclohexadec-2-en-1-one (2550-59-6; 3100-36-5; 88642-03- 9; Aurelione); 3,4-diethyl-2,5-dimethylcyclohex-2-en-1-one (68845-36-3; Azarbre); 1 ,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta(g)-2-benzopyran (1222-05-5; Galaxolide); (2R,4S)-2-methyl-4-propyl-1 ,3-oxathiane + 2-methyl-4-propyl-1 ,3-oxathiane (59323-76-1 , 261-699-8; Oxane / Oxanthia; 3,7'-Dimethyl-3,4,4a,5,8,8a-hexahydrospiro- (1 ,4-methanonaphthalene- 2(1 H),2'-oxirane) (41816-03-9; Rhubofix); Anethol; Lime Oxide; Nerolin Yara Yara; and Orange Flower Ether.

[0046] Preferably, the, one, two, three or more or all ketone(s) in the perfume oil is / are selected from the group consisting of 7-methyl-3,4-dihydro-2H-1 ,5-benzodioxepin-3-one (249-320- 4; Calone); 1 ,2,3,5,6,7-hexahydro-1 ,1 ,2,3,3-pentamethyl-4H-inden-4-one (251-649-3; Cashmeran); [3R-(3a,3ap,6a,7p,8aa)]-octahydro-6-methoxy-3,6,8,8-tetramethyl-1 H-3a,7- methanoazulene + (3R,3aS,6R,7R,8aS)-octahydro-6-methoxy-3,6,8,8-tetramethyl-1 H- 3a,7-methanoazulene (19870-74-7; 67874-81-1 ; Cedramber); 3a,6,6,9a-tetramethyl- 2,4,5,5a,7,8,9,9b-octahydro-1 H-benzo[e][1]benzofuran (3738-00-9; Cetalox); 1-(5,5-dime- thyl-1-cyclohexenyl)pent-4-en-1-one (56973-85-4; Dynascone, Galbascone); 1-[bis(2-hy- droxypropyl)amino]propan-2-ol; 5-methylhept-2-en-4-one (102322-83-8; 81925-81-7; Fil- bertone); 4-(4-hydroxyphenyl)butan-2-one (5471-51-2; Frambinon); (8E)-cyclohexadec-8- en-1-one (3100-36-5; Globanone); 1-(2,3,8,8-tetramethyl-1 ,3,4,5,6,7-hexahydronaphtha- len-2-yl)ethanone (54464-57-2; Iso E Super); cyclohexadecanone (2550-52-9; Iso- muscone); 5,5,9,13-tetramethyl-14,16-dioxatetracyclo[11 .2.1 .01 ,10.04, 9]hexadecane (57345-19-4; Ketamber); 4-(1 -Ethoxyvinyl)-3, 3,5,5, -tetramethyl-cyclohexane-1 - one(57345-19-4; Kephalis); 5-hexyl-5-methyloxolan-2-one (7011-83-8; Lactojasmone); (E)-3-methyl-4-(2,6,6-trimethyl-1-cyclohex-2-enyl)but-3-en-2-one (127-51-5; Methyl Ionone Gamma Coeur); N-1-(2,6,6-trimethyl-1-cyclohex-2-enyl)pent-1-en-3-one (1335-46-2; Methyl Ionone Gamma Pure); (5E)-3-methylcyclopentadec-5-en-1-one; (5E)-3-methylcy- clopentadec-5-en-1-one (63314-79-4; 82356-51-2; Muscenone); 3-methylcyclopentade- can-1-one (541-91-3; Muscone); 2-[2-(4-methyl-1-cyclohex-3-enyl)propyl]cyclopentan-1- one (95962-14-4; Nectaryl); 1-(3-methyl-1-benzofuran-2-yl)ethan-1-one (23911-56-0; Nerolione); octahydro-7-methyl-1 ,4-methanonaphthalen-6(2H)-one (41724-19-0; Plicatone); 1-(3,5,5,6,8,8-hexamethyl-6,7-dihydronaphthalen-2-yl)ethanone + 1 -(3, 5, 5, 6,8,8- hexamethyl-6,7-dihydronaphthalen-2-yl)ethanone (1506-02-1 ; 21145-77-7; Tonalide); 2,2,5-trimethyl-5-pentylcyclopentan-1-one (65443-14-3; Veloutone); 1-[(3 / ?,3a / ?,7 / ?,8aS)- 2,3,4,7,8,8a-Hexahydro-3,6,8,8-tetramethyl-1 H-3a,7-methanoazulen-5-yl]ethenone (32388-55-9; Vertofix); Damascenone; Alpha Damascone; Beta Damascone; Delta Damascone; Beta Dihydro Ionone; Dihydro Jasmone; Ethyl Maltol; Gamma Hexalactone; Alpha Ionone; Beta Ionone; Jasmone Cis; Maltol; Methyl Ionone; Menthone; and Isomenthone.

[0047] Preferably, the, one, two, three or more or all lactone(s) in the perfume oil is / are selected from the group consisting of 5-heptyloxolan-2-one (104-67-6; Aldehyde C14 So-Called); 5- pentyloxolan-2-one (203-219-1 ; Aldehyde C18 So-Called); (9Z)-17-oxacycloheptadec-9- en-1-one (28645-51-4; Ambrettolide); (12E / Z)-1-oxacyclohexadec-12-en-2-one + (13E / Z)- oxacyclohexadec-3-en-2-one (111879-80-2; 34902-57-3; Globalide); 16-oxacyclohexa- decan-1-one (106-02-5; Supra Macrolide); Delta Decalactone; Gamma Decalactone; Gamma Octalactone; Rose Oxide High Cis; Jasmin Lactone; and Jasmolactone CNC. Preferably, the, one, two, three or more or all terpene(s) in the perfume oil is / are selected from the group consisting of Galbanolene super; Galbanum decatriene; Limonene; Myrcen; and Phellandren.

[0048] Preferably, the, one, two, three or more or all non-ionic solubilizer(s) b) is / are selected from the group consisting of products of the addition of 2 to 30 mol ethylene oxide and / or 0 to 5 mol propylene oxide onto linear Ca-22 fatty alcohols, onto C12-22 fatty acids and onto alkyl phenols containing 8 to 15 carbon atoms in the alkyl group,

[0049] C12 / 18 fatty acid monoesters and diesters of addition products of 1 to 30 mol ethylene oxide onto glycerol, glycerol mono- and diesters and sorbitan mono- and diesters of saturated and unsaturated fatty acids containing 6 to 22 carbon atoms and ethylene oxide addition products thereof, addition products of 15 to 60 mol ethylene oxide onto castor oil and / or hydrogenated castor oil, polyol esters and, in particular, polyglycerol esters such as, for example, polyglycerol polyricinoleate, polyglycerol poly-12-hydroxystearate or polyglycerol dimerate isostearate, addition products of 2 to 15 mol ethylene oxide onto castor oil and / or hydrogenated castor oil, partial esters based on linear, branched, unsaturated or saturated C6 / 22 fatty acids, ricinoleic acid and 12-hydroxystearic acid and glycerol, polyglycerol, pentaerythritol, dipentaerythritol, sugar alcohols (for example sorbitol), alkyl glucosides (for example methyl glucoside, butyl glucoside, lauryl glucoside) and polyglucosides (for example cellulose), mono-, di and trialkyl phosphates and mono-, di- and / or tri-PEG-alkyl phosphates and salts thereof, wool wax alcohols, polysiloxane / polyalkyl polyether copolymers and corresponding derivatives, mixed esters of pentaerythritol, fatty acids, citric acid and fatty alcohol and / or mixed esters of C6-22 fatty acids, methyl glucose and polyols, preferably glycerol or polyglycerol, alkyl and / or alkenyl oligoglycosides, polyalkylene glycols, and glycerol carbonate.

[0050] Preferably, the addition products of ethylene oxide and / or propylene oxide onto fatty alcohols, fatty acids, alkyl phenols, glycerol mono- and diesters and sorbitan mono- and diesters of fatty acids or onto castor oil, as described herein, are known commercially available products. Preferably, these are homologue mixtures of which the average degree of alkoxylation corresponds to the ratio between the quantities of ethylene oxide and / or propylene oxide and substrate with which the addition reaction is carried out.

[0051] Preferably, C12 / 18 fatty acid monoesters and diesters of addition products of ethylene oxide onto glycerol are known as lipid layer enhancers for cosmetic formulations.

[0052] It is preferred for the microemulsion according to the invention that the, one, two, three or more or all non-ionic solubilizer(s) b) is / are selected from the group consisting of alkox- ylated alcohols, sorbitan esters, polyglycerol esters, alk(en)yl oligoglycosides and alkox- ylated castor oils, preferably wherein the or one non-ionic solubilizer is an alkoxylated castor oil, preferably ethoxylated hydrogenate castor oil, and / or preferably wherein wherein the or one non-ionic solubilizer is an alkoxylated alcohol, preferably according to formula (I) R1O(EO)x(PO)yH (formula (I)) wherein R1stands for a linear or branched saturated or unsaturated alkyl or alkenyl group with 6 to 16 carbon atoms, EO for an ethylene oxide unit, PO for a propylene oxide unit, x and y independently from each other for 0 or an integer from 1 to 20, wherein the sum (x+y) is different from 0, preferably polyoxyethylenated (6) decanol.

[0053] The term “ethoxylated hydrogenate castor oil” preferably refers to PEG-40 hydrogenated castor oil, preferably according to the compound according to CAS No. 61788-85-0 (preferably as described by https: / / www.chemicalbook.com).

[0054] The term “polyoxyethylenated (6) decanol” preferably refers to 2-decoxyethanol, particularly preferably to the compound according to CAS No. 26183-52-8 (preferably as described by https: / / www.chemicalbook.com).

[0055] Additionally or alternatively, it is preferred for the microemulsion according to the invention that the, one, two, three or more or all sorbitan ester(s) is / are selected from the group consisting of sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan diisostearate, sorbitan tri isostea rate, sorbitan monooleate, sorbitan sesquioleate, sorbitan dioleate, sorbitan trioleate, sorbitan monoerucate, sorbitan sesquierucate, sorbitan dierucate, sorbitan trierucate, sorbitan monoricinoleate, sorbitan sesquiricinoleate, sorbitan diricinoleate, sorbitan triricinoleate, sorbitan monohydroxystearate, sorbitan sesquihydroxystearate, sorbitan dihydroxystearate, sorbitan trihydroxystearate, sorbitan monotartrate, sorbitan ses- quitartrate, sorbitan ditartrate, sorbitan tritartrate, sorbitan monocitrate, sorbitan ses- quicitrate, sorbitan dicitrate, sorbitan tricitrate, sorbitan monomaleate, sorbitan sesquimale- ate, sorbitan dimaleate, sorbitan trimaleate including its addition products of 10 to 100 mol ethylene oxide.

[0056] It is particularly preferred for the microemulsion according to the invention, that the or one or two or all sorbitan ester(s) is / are selected from the group consisting of polysorbate 20 and polysorbate 80. Preferably, the or one sorbitan ester is polysorbate 20. Preferably, the or one sorbitan ester is polysorbate 80. Preferably two or all sorbitan esters are polysorbate 20 and polysorbate 80. Additionally or alternatively, it is preferred for the microemulsion according to the invention that the aqueous phase comprises, essentially consists of or consists of water.

[0057] Preferably, the term “essentially consists of’ describes that the respective substance makes up at least 90 wt.-%, preferably at least 91 wt.-%, preferably at least 92 wt.-%, preferably at least 93 wt.-%, preferably at least 94 wt.-%, preferably at least 95 wt.-%, preferably at least 96 wt.-%, preferably at least 97wt.-%, preferably at least 98 wt.-%, preferably at least 99 wt.-%, preferably at least 99.5 wt.-%, of the aqueous phase, based on the total weight of the aqueous phase.

[0058] Preferably, the content of water is determined by Karl Fisher titration.

[0059] Additionally or alternatively, it is preferred for the microemulsion according to the invention that the aqueous phase comprises water and one or both of ethanol and isopropanol.

[0060] It is further preferred for the microemulsion according to the invention that the weight ratio of the non-aqueous phase to the aqueous phase is in a range of from 1 :10.000 to 10:1 , preferably of from 1 :1 .000 to 5:1 , further preferably of from 1 :500 to 2:1 , more preferably of from 1 :99 to 1 :1.

[0061] It is further preferred for the microemulsion according to the invention that the microemulsion comprises the non-aqueous phase in an amount of from 0.01 to 90 wt.-%, preferably of from 0.05 to 75 wt.-%, particularly preferably of from 0.1 to 70 wt.-%, further preferably of from 0.5 to 60 wt.-%, even further preferably of from 1 to 50 wt.-%, based on the total weight of the microemulsion.

[0062] It is further preferred forthe microemulsion according to the invention that the non-aqueous phase comprises 0.1 to 15 wt.-%, preferably 0.5 to 10 wt.-%, particularly preferably 1 to 5 wt.-% of the one or more perfume oil(s) and / or one or more fragrance(s) a), based on the total weight of the non-aqueous phase.

[0063] It is further preferred forthe microemulsion according to the invention that the non-aqueous phase comprises 0.1 to 20 wt.-%, preferably 0.5 to 12.5 wt.-%, particularly preferably 1 to 8 wt.-% of the one or more non-ionic solubilizer(s) b), based on the total weight of the nonaqueous phase. It is further preferred forthe microemulsion according to the invention that the non-aqueous phase comprises 0.1 to 20 wt.-%, preferably 0.75 to 12.5 wt.-%, particularly preferably 1 .5 to 7.5 wt.-% of the one or more solvent (s) c), based on the total weight of the non-aqueous phase.

[0064] It is further preferred forthe microemulsion according to the invention that the non-aqueous phase comprises 0.1 to 15 wt.-%, preferably 0.5 to 10 wt.-%, particularly preferably 1 to 5 wt.-% of the one or more solvent(s) d), based on the total weight of the non-aqueous phase.

[0065] It is further preferred for the microemulsion according to the invention that the microemulsion has a nephelometric turbidity (NTU) of at most 50, preferably at most 40, particularly preferably at most 30, when measured with a turbidity meter using visible light.

[0066] It is further preferred for the microemulsion according to the invention that the microemulsion has a nephelometric turbidity (NTU) in the range of from 1 to 50, preferably of from 2 to 40, particularly preferably of from 5 to 30, when measured with a turbidity meter using visible light.

[0067] Preferably, the term “visible light”, as used herein, refers to light with a wavelength in the range of from 380 to 750 nm.

[0068] It is further preferred for the microemulsion according to the invention that the microemulsion has a nephelometric turbidity (NTU) of at most 15, preferably at most 10, particularly preferably at most 5, when measured with a turbidity meter using infrared light.

[0069] It is further preferred for the microemulsion according to the invention that the microemulsion has a nephelometric turbidity (NTU) in the range of from 1 to 15, preferably of from 2 to 10, particularly preferably of from 3 to 5, when measured with a turbidity meter using infrared light.

[0070] Preferably, the term “infrared light”, as used herein, refers to light with a wavelength in the range of from 751 nm to 1 mm.

[0071] Preferably, the term “nephelometric turbidity (NTU)” refers to the unit of a liquid's turbidity measured with a calibrated nephelometer. A NTU number of at most 1 - which is the requirement for drinking water - means a transparent and clear solution with no clouds or hazes. Preferably, the nephelometric turbidity is determined at 20 °C.

[0072] The present invention further relates to a method for obtaining a microemulsion according to the invention, comprising or consisting of the following steps:

[0073] (i) providing a non-aqueous phase comprising or consisting of a) one or more perfume oil(s), b) one or more non-ionic solubilizer(s), c) one or more solvents) selected from the group consisting of 3-methoxy-3- methyl-1 -butanol (MMB), dipropyleneglycol methyl ether (DPM), dipropylene glycol methyl ether acetate (DPMA), and d) one or more solvent(s) selected from the group consisting of 1 ,2-propylengly- col, diethylene glycol, 1 ,3-propandiol, butane diol, hexane diol, octane diol, ethylene glycol, 2,2-dimethyl-1 ,3-dioxolan-4-ylmethanol (Augeo clean Multi), (2-isobutyl-2-methyl-1 ,3-dioxolan-4-yl)methanol (Augeo clean plus), 2,2-di- methyl-1 ,3-dioxolan-4-ylmethanol (Augeo crystal),

[0074] (ii) providing an aqueous phase;

[0075] (iii) blending said non-aqueous and said aqueous phase and subjecting the mixture to stirring unless an emulsion with a NTU of at most 50, preferably at most 40, particularly preferably at most 30, further preferably at most 20, when measured with a turbidity meter using visible light, and / or at most 15, preferably at most 10, particularly preferably at most 5, when measured with a turbidity meter using infrared light is formed.

[0076] What was said above with regard to the microemulsion according to the invention, particularly preferred features and embodiments, applies accordingly to the method according to the invention for obtaining such a microemulsion. Preferably, the solvent c) is or comprises dipropyleneglycol methyl ether (DPM).

[0077] Preferably, the solvent c) is or comprises 3-methoxy-3-methyl-1 -butanol (MMB).

[0078] Preferably, the solvent c) is or comprises dipropylene glycol methyl ether acetate (DPMA).

[0079] Preferably, the solvent c) is not or does not comprise dipropyleneglycol (DPG).

[0080] Preferably, the solvent d) is or comprises octane diol, preferably 1 ,2-octane diol.

[0081] Preferably, the solvent d) is or comprises 1 ,2-propylene glycol.

[0082] Preferably, the solvent d) is or comprises diethylene glycol.

[0083] Preferably, the solvent d) is or comprises 1 ,3-propane diol.

[0084] The present invention further relates to a method for air scenting comprising or consisting of the following steps: i) providing a microemulsion according to the invention, ii) diffusing the microemulsion provided in step i), preferably by sticks made from reed, paper or plastic.

[0085] What was said above with regard to the microemulsion according to the invention and / or the method according to the invention for obtaining such a microemulsion, particularly preferred features and embodiments, applies accordingly to the method for air scenting according to the invention.

[0086] The present invention further relates to the use of the microemulsion according to the invention as an aroma or fragrance diffuser composition and / or for air scenting.

[0087] What was said above with regard to the microemulsion according to the invention, the method according to the invention for obtaining such a microemulsion, and / or the method for air scenting according to the invention, particularly preferred features and embodiments, applies accordingly to the use according to the invention. The present invention further relates to a home care product or body care product comprising the microemulsion according to the invention.

[0088] Preferably, the home care product or the body care product according to the invention comprises the microemulsion according to the invention in an amount of from 0.01 to 90 wt.-%, preferably of from 0.05 to 75 wt.-%, particularly preferably of from 0.1 to 70 wt.-%, further preferably of from 0.5 to 60 wt.-%, even further preferably of from 1 to 50 wt.-%, based on the total weight of the home care product or body care product.

[0089] Preferably, a home care product according to the invention is selected from air refreshers, aerosols, perfumed refreshing tissues, acid, alkaline or neutral cleaning agents, textile refreshing agents, ironing aids, liquid washing agents, washing agents in powder form, laundry pre-treatment agents, fabric softeners, laundry soap, laundry tablets, disinfectants, surface disinfectants, waxes and polishes, products of decorative cosmetics, candles, lamp oils, joss sticks, insecticides, repellents and propellants.

[0090] Preferably, a body care product according to the invention is selected from body sprays, perfume extracts, perfumes, eau de toilettes, aftershaves, eau de colognes, pre-shave- products, splash-colognes, hand creams and lotions, shower gels, foot creams and lotions, depilatory creams and lotions, aftershave creams and lotions, tanning creams and lotions, hair-care products, shampoos, deodorants, anti-transpirants.

[0091] What was said above with regard to the microemulsion according to the invention, the method according to the invention for obtaining such a microemulsion, the method for air scenting according to the invention, and / or the use according to the invention, particularly preferred features and embodiments, applies accordingly to the home care or body care product according to the invention.

[0092] The present invention further relates to a scent kit comprising or consisting of

[0093] I) the microemulsion according to the invention,

[0094] II) at least one stick, preferably made from reed, paper or plastic,

[0095] III) and optionally: a diffusor. What was said above with regard to the microemulsion according to the invention, the method according to the invention for obtaining such a microemulsion, the method for air scenting according to the invention, the use according to the invention, and / or the home care or body care product according to the invention, particularly preferred features and embodiments, applies accordingly to the home care or body care product according to the invention.

[0096] The present invention further relates to a microemulsion comprising a non-aqueous and an aqueous phase, wherein the non-aqueous phase comprises or consists of a) one or more perfume oil(s), b) one or more non-ionic solubilizer(s), preferably two or more non-ionic solubilizers, wherein the non-ionic solubilizers comprise one or more alkoxylated castor oils and one or more sorbitan ester(s), c) one or more solvent(s) selected from the group consisting of 3-methoxy-3-methyl-1- butanol (MMB), dipropyleneglycol (DPG), dipropyleneglycol methyl ether (DPM), tripropyleneglycol methyl ether (TPM); butyldiglycol (DB), diethylene glycol monoethyl ether, propylene glycol monomethyl ether (PM), ethanol, propanol, butanol, diethylenglycol phenylether (DiEPh), dipropylene glycol methyl ether acetate (DPMA), dipropylenglycol-n-butylether (DPNB), di(propylene glycol) propyl ether (DPNP), 3-butoxypropane-2-ol (PnB), heptane diol, and 1 ,2,3-propantrioltriacetate (Triacetin), and d) one or more solvent(s) selected from the group consisting of 1 ,2-propylenglycol, diethylene glycol, 1 ,3-propandiol, butane diol, hexane diol, octane diol, ethylene glycol,

[0097] 2.2-dimethyl-1 ,3-dioxolan-4-ylmethanol (Augeo clean Multi), (2-isobutyl-2-methyl-

[0098] 1 .3-dioxolan-4-yl)methanol (Augeo clean plus), 2,2-dimethyl-1 ,3-dioxolan-4- ylmethanol (Augeo crystal).

[0099] What was said above regarding the microemulsion according to the invention, particularly with regard to definitions and preferred features applies accordingly, if appropriate. It is preferred for the microemulsion according to the invention that the or one alkoxylated castor oil is ethoxylated hydrogenated castor oil.

[0100] The term “ethoxylated hydrogenate castor oil” refers to PEG-40 hydrogenated castor oil, preferably according to cas no. 61788-85-0 (preferably as described by https: / / www.chem- icalbook.com).

[0101] It is particularly preferred for the microemulsion according to the invention, that the or one or two or all sorbitan ester(s) is / are selected from the group consisting of polysorbate 20 and polysorbate 80. Preferably, the or one sorbitan ester is polysorbate 20. Preferably, the or one sorbitan ester is polysorbate 80. Preferably two or all sorbitan esters are polysorbate 20 and polysorbate 80.

[0102] Preferably, the, one, two, three or more or all solvents) c) is / are selected from the group consisting of 3-methoxy-3-methyl-1 -butanol (MMB), dipropyleneglycol (DPG), dipropyleneglycol methyl ether (DPM), tripropyleneglycol methyl ether (TPM); butyldiglycol (DB), diethylene glycol monoethyl ether, propylene glycol monomethyl ether (PM), ethanol, propanol, butanol, diethylenglycol phenylether (DiEPh), dipropylene glycol methyl ether acetate (DPMA), heptane diol, and 1 ,2,3-propantrioltriacetate (Triacetin),

[0103] Preferably, the, one, two, three or more or all solvents) c) is / are selected from the group consisting of 3-methoxy-3-methyl-1 -butanol (MMB), dipropyleneglycol (DPG), dipropyleneglycol methyl ether (DPM), butyldiglycol (DB), diethylene glycol monoethyl ether, propylene glycol monomethyl ether (PM), ethanol.

[0104] Preferably, the solvent c) is or comprises one, two, three or more or all of dipropyleneglycol methyl ether (DPM), 3-methoxy-3-methyl-1 -butanol (MMB), dipropyleneglycol (DPG), dipropyleneglycol methyl ether (DPM), butyldiglycol (DB), diethylene glycol monoethyl ether, propylene glycol monomethyl ether (PM), ethanol.

[0105] Preferably, the solvent c) is or comprises dipropyleneglycol methyl ether (DPM).

[0106] Preferably, the solvent c) is or comprises 3-methoxy-3-methyl-1 -butanol (MMB).

[0107] Preferably, the solvent c) is or comprises dipropyleneglycol (DPG).

[0108] Preferably, the solvent c) is or comprises dipropyleneglycol methyl ether (DPM). Preferably, the solvent c) is or comprises butyldiglycol (DB).

[0109] Preferably, the solvent c) is or comprises diethylene glycol monoethyl ether.

[0110] Preferably, the solvent c) is or comprises propylene glycol monomethyl ether (PM).

[0111] Preferably, the solvent c) is or comprises ethanol.

[0112] Preferably, the solvent d) is or comprises one, two or all of 1 ,2-propylene glycol, diethylene glycol and 1 ,3-propandiol.

[0113] Preferably, the solvent d) is or comprises 1 ,2-propylene glycol.

[0114] Preferably, the solvent d) is or comprises diethylene glycol.

[0115] Preferably, the solvent d) is or comprises 1 ,3-propandiol.

[0116] Preferably, the term “butane diol” refers to 1 ,3-butane diol, further preferably to 3-Methyl- 1 ,3-butanediol (preferably defined by the CAS No: 2568-33-4).

[0117] Preferably, the term “hexane diol” refers to 1 ,2-hexane diol.

[0118] Preferably, the term “heptane diol” refers to 1 ,3-heptane diol.

[0119] Preferably, the term “octane diol” refers to 1 ,2-octane diol.

[0120] Preferably, the microemulsion according to the invention comprises one or more further non-ionic solubilizer(s), preferably (a) non-ionic solubilizer(s) b) as defined above.

[0121] Fig. 1 shows the even faster evaporation of the microemulsions according to the invention compared to the evaporation of the microemulsions as in EP 4 314 195 A1 , as described in Example 2.

[0122] Fig. 2 shows the results of Example 4 comparing the evaporation of different solvents. Fig. 3 shows the results of Example 5 with the solvents c) DPG (grey, hash), DPM (triangle), DPMA (square), MMB (circle) and solvents d) 1 ,2-octane diol (A), propylene glycol (B), and 1 ,3-propane diol (C).

[0123] Fig. 4 shows the results of Example 5 with the solvents c) DPG (grey, hash), DPM (triangle), DPMA (square), MMB (circle) and solvents d) 1 ,2-octane diol (A), propylene glycol (B), and 1 ,3-propane diol (C).

[0124] Further aspects and advantages of the invention result from the subsequent description of preferred examples.

[0125] Examples

[0126] Example 1 : Microemulsions according to the invention

[0127] The perfume oil, the solvent and the emulsifier are placed into beaker and get mixed with a stirrer. Subsequently, a small amount of water is added, such that an emulsion can be formed. Afterwards, the rest of the water is added. The resulting microemulsion is stirred until it has become clear.

[0128] Example 2: Turbidity and evaporation

[0129] The following microemulsions were prepared:

[0130] Microemulsions A and B are microemulsions according to the invention. Microemulsions C and D are microemulsions according to EP 4 314 195 A1.

[0131] The turbidity of microemulsions A to D was measured and determined as nephelometric turbidity (NTU). It was found that the turbidity of microemulsions A and B was much lower than the turbidity of microemulsions C and D. In average, the turbidity of microemulsions A and B was 3.7 NTU less than the turbidity of microemulsions C and D, even though the same amount of perfume oil was used (A vs. C and B vs. D).

[0132] Further microemulsions according to the invention with similar composition as above were tested and comparable results were achieved. For some oils, the amount of imbentin slightly varied, wherein the amount of DPM and / or 1 ,2-propylene glycol was adapted accordingly to achieve the same total amount.

[0133] Microemulsions A to D were tested fortheir evaporation profile in a separate room, in which only evaporations are observed. The temperature in the room was 22°C and the humidity was between 40 to 60 %. The tested sample volume was 90 mL, whereas triplicates were analysed for each sample. The mean of the triplicates was determined as result. At days 1 , 3, 5, 7 and afterwards 1 per week, the samples are weighed to determine the evaporated amount. The evaporation was measured until only 10 % of the microemulsion was remaining in the sample. The results are shown in Fig. 1 .

[0134] It was found that the samples A and B reached 10 % of remaining microemulsion at approx, day 25, whereas samples C and D reached this point between days 35 and 40. Thus, samples A and B showed an even faster evaporation than samples C and D.

[0135] It was thus found that combining a solvent of group c) with 1 ,2-propylene glycol (according to the invention) provided an even faster evaporation than such a combination with 1 ,2- pentane diol (as in EP 4 314 195 A1).

[0136] Consequently, replacing the 1 ,2-pentane diol in EP 4 314 195 A1 to obtain a microemulsion according to the invention provided an even faster evaporation.

[0137] Example 3: Further microemulsions according to the invention

[0138] The following microemulsions according to the invention were prepared:

[0139] It was found that the prepared microemulsions showed a particularly low turbidity. The above microemulsions containing 1 ,2-Propylene glycol, Diethylene glycol, 1 ,3-Propanediol nat, 3-Methyl-1 ,3-butanediol, Ethylene glycol, Augeo Clean multi, or Augeo Crystal, advan- tageously did not show any turbidity.

[0140] Further, the experiment in Example 2 was repeated with the above microemulsions. It was found that the tested microemulsions also provided a particularly good evaporation.

[0141] Thus, combining a solvent of group c) with one of the solvents of group d) (according to the invention) provided a particularly low turbidity and a particularly advantageous evaporation, superior to a combination with 1 ,2-pentane diol (as in EP 4 314 195 A1).

[0142] Consequently, replacing the 1 ,2-pentane diol in EP 4 314 195 A1 to obtain a microemulsion according to the invention provided much less turbidity and a superior evaporation.

[0143] Example 4: Evaporation of solvents c)

[0144] To compare the evaporation of the single solvents, 90 ml solvent were provided and weighed. The solvents were placed in beakers and 8 fiber sticks were placed in the solvents. The beakers were kept at room temperature. The weight of the solvents was measured over time to determine how much of the solvent has already evaporated. The solvents 3-methoxy-3-methyl-1 -butanol (MMB), Dipropyleneglycol (DPG), Dipropyleneglycol methyl ether (DPM), dDpropylene glycol methyl ether acetate, H2O, Dowanol TPM, Dowanol DPNB, Dowanol PM, Dowanol DiEPh, Butyldiglycol, and Ethanol (96 %) were tested.

[0145] It was found that Dowanol PM, Ethanol and H2O evaporated too fast and were thus less suitable for being used for air scents.

[0146] In contrast, the solvents DPG, Dowanol DiEPh, Dowanol TPM, Butyldiglycol, and Dowanol DPNB did not evaporate or evaporated too slowly and were thus less suitable for being used for air scents.

[0147] Surprisingly DPMA and DPM provided an advantageous evaporation. The results are shown in Fig. 2.

[0148] Example 5: Evaporation of a mixture of solvents c) and d)

[0149] The evaporation of solvent mixtures was examined as described in Example 4.

[0150] The combinations DPG + 1 ,2-octane diol, DPG + propylene glycol, DPG + propane diol, DPM + 1 ,2-octane diol, DPM + propylene glycol, DPM + propane diol, DPMA + 1 ,2-octane diol, DPMA + propylene glycol, DPMA + propane diol, MMB + 1 ,2-octane diol, MMB + propylene glycol, and MMB + propane diol were tested.

[0151] The volume ratio of solvents c) to solvents d) was 9:1 .

[0152] It was found that DPG provided a much slower evaporation than DPM, DPMA, and MMB. DPM, DPMA, and MMB provided a similar evaporation. The results are shown in Fig. 3.

[0153] Example 6: Evaporation of a microemulsions

[0154] Mixtures of perfume oils a), solubilizers b), solvents c) and d) were prepared as non-aqueous phase and water was provided as aqueous phase. The two phases were mixed to prepare a microemulsion.

[0155] The microemulsions were prepared according to the following recipe:

[0156] DPG, DPM, DPMA, and MMB were used as solvents c).

[0157] 1 ,2-octane diol, propylene glycol, and propane diol were used as solvents d).

[0158] The evaporation was examined as described in Example 4 and 5. It was found that for each solvent d), DPG provided the slowest evaporation. DPM, DPMA, and MMB provided a similar evaporation, which was better suited for being used for air scents than the microemulsions using DPG as solvent c). The results are shown in Fig. 4.

[0159] Interestingly, it was found that the microemulsions using MMB as solvent c) showed a yellow discoloration after approximately half of the emulsion was evaporated. A yellow discol- oration is considered less advantageous for products being used by consumers. All three solvents c) provided an advantageous evaporation, however, among DPM, DPMA, and MMB, the solvents DPM and DPMA are more preferred than MMB.

[0160] Further interestingly, it was found that the microemulsions using DPMA showed a very slight milky appearance after a large portion of the emulsion was already evaporated. The slight milky appearance was much less visible and appeared later than the yellow discoloration of MMB described above. Both solvents c) provided an advantageous evaporation, however, among DPM and DPMA, the solvent DPM is more preferred than DPMA.

[0161] Example 7: Combinations of sorbitan esters and alkoxylated castor oils The microemulsions as shown in the subsequent table were prepared.

[0162] After preparation, the microemulsions were swung on a swing for one week. The temperature of the microemulsions was heated I cooled to 40 °C or, respectively -20 °C, which alternated every 12 hours. After one week, the turbidity of microemulsions A to D was measured and determined as nephelometric turbidity (NTU).

[0163] Example 7.1 : Ethoxylated hydrogenate castor oil only

[0164] Example 7.2: Sorbitan esters only

[0165]

[0166] Example 7.3: Combination of ethoxylated hydrogenate castor oil and sorbitan esters

[0167] It was surprisingly found that the sorbitan esters further reduced the turbidity in the samples, which was surprising, since the sorbitan esters alone provided a rather high turbidity (see Example 7.2). It was thus found that the ethoxylated hydrogenate castor oil and the sorbitan esters provide a synergistic effect.

Claims

1. Claims1 . Diffusible microemulsion comprising a non-aqueous and an aqueous phase, wherein the non-aqueous phase comprises or consists of a) one or more perfume oil(s), b) one or more non-ionic solubilizer(s), c) one or more solvents) selected from the group consisting of 3-methoxy-3- methyl-1 -butanol (MMB), dipropyleneglycol methyl ether (DPM), dipropylene glycol methyl ether acetate (DPMA), and d) one or more solvent(s) selected from the group consisting of 1 ,2-propylengly- col, diethylene glycol, 1 ,3-propandiol, butane diol, hexane diol, octane diol, ethylene glycol, 2,2-dimethyl-1 ,3-dioxolan-4-ylmethanol (Augeo clean Multi), (2-isobutyl-2-methyl-1 ,3-dioxolan-4-yl)methanol (Augeo clean plus), 2,2-di- methyl-1 ,3-dioxolan-4-ylmethanol (Augeo crystal).

2. Diffusible microemulsion according to claim 1 , wherein the, one, two, three or more or all non-ionic solubilizer(s) is / are selected from the group consisting of alkoxylated alcohols, sorbitan esters, polyglycerol esters, alk(en)yl oligoglycosides and alkoxylated castor oils, preferably wherein the or one non-ionic solubilizer is an alkoxylated castor oil, preferably ethoxylated hydrogenate castor oil, and / or preferably wherein wherein the or one non-ionic solubilizer is an alkoxylated alcohol, preferably according to formula (I)R1O(EO)x(PO)yH (formula (I)) wherein R1stands for a linear or branched saturated or unsaturated alkyl or alkenyl group with 6 to 16 carbon atoms, EO for an ethylene oxide unit, POfor a propylene oxide unit, x and y independently from each other for 0 or an integer from 1 to 20, wherein the sum (x+y) is different from 0, preferably polyoxyethylenated (6) decanol.

3. Diffusible microemulsion according to any of the preceding claims , wherein the or one non-ionic solubilizer is a sorbitan ester selected from the group consisting of sorbitan monoisostearate, sorbitan sesqui isostea rate, sorbitan diisostearate, sorbitan triisostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan dioleate, sorbitan trioleate, sorbitan monoerucate, sorbitan sesquierucate, sorbitan dierucate, sorbitan trierucate, sorbitan monoricinoleate, sorbitan sesquiricinoleate, sorbitan diricinoleate, sorbitan triricinoleate, sorbitan monohydroxystearate, sorbitan sesqui- hydroxystearate, sorbitan dihydroxystearate, sorbitan trihydroxystearate, sorbitan monotartrate, sorbitan sesquitartrate, sorbitan ditartrate, sorbitan tritartrate, sorbitan monocitrate, sorbitan sesquicitrate, sorbitan dicitrate, sorbitan tricitrate, sorbitan monomaleate, sorbitan sesquimaleate, sorbitan dimaleate, sorbitan trimaleate including its addition products of 10 to 100 mol ethylene oxide.

4. Diffusible microemulsion according to any of the preceding claims, wherein the aqueous phase comprises water and one or both of ethanol and isopropanol.

5. Diffusible microemulsion according to any of the preceding claims, wherein the nonaqueous phase comprises 0.1 to 15 wt.-%, preferably 0.5 to 10 wt.-%, particularly preferably 1 to 5 wt.-% of the one or more perfume oil(s) and / or one or more fragrance^) a), based on the total weight of the non-aqueous phase.

6. Diffusible microemulsion according to any of the preceding claims, wherein the nonaqueous phase comprises 0.1 to 20 wt.-%, preferably 0.5 to 12.5 wt.-%, particularly preferably 1 to 8 wt.-% of the one or more non-ionic solubilizer(s) b), based on the total weight of the non-aqueous phase.

7. Diffusible microemulsion according to any of the preceding claims, wherein the nonaqueous phase comprises 0.1 to 20 wt.-%, preferably 0.75 to 12.5 wt.-%, particularly preferably 1 .5 to 7.5 wt.-% of the one or more solvent (s) c), based on the total weight of the non-aqueous phase.

8. Diffusible microemulsion according to any of the preceding claims, wherein the nonaqueous phase comprises 0.1 to 15 wt.-%, preferably 0.5 to 10 wt.-%, particularly preferably 1 to 5 wt.-% of the one or more solvents) d), based on the total weight of the non-aqueous phase.

9. Diffusible microemulsion according to any of the preceding claims, wherein the microemulsion has a nephelometric turbidity (NTU) of at most 50, preferably at most 40, particularly preferably at most 30, when measured with a turbidity meter using visible light.

10. Method for obtaining a microemulsion according to any of the preceding claims, comprising or consisting of the following steps:(i) providing a non-aqueous phase comprising or consisting of a) one or more perfume oil(s), b) one or more non-ionic solubilizer(s), c) one or more solvents) selected from the group consisting of 3-methoxy- 3-methyl-1 -butanol (MMB), dipropyleneglycol methyl ether (DPM), dipropylene glycol methyl ether acetate (DPMA), and d) one or more solvents) selected from the group consisting of 1 ,2-pro- pylenglycol, diethylene glycol, 1 ,3-propandiol, butane diol, hexane diol, octane diol, ethylene glycol, 2,2-dimethyl-1 ,3-dioxolan-4-ylmethanol (Augeo clean Multi), (2-isobutyl-2-methyl-1 ,3-dioxolan-4-yl)methanol (Augeo clean plus), 2,2-dimethyl-1 ,3-dioxolan-4-ylmethanol (Augeo crystal),(ii) providing an aqueous phase;(iii) blending said non-aqueous and said aqueous phase and subjecting the mixture to stirring unless an emulsion with a NTU of at most 50, preferably at most 40, particularly preferably at most 30, further preferably at most 20, when measured with a turbidity meter using visible light,and / or at most 15, preferably at most 10, particularly preferably at most 5, when measured with a turbidity meter using infrared light is formed.11 . Method for air scenting comprising or consisting of the following steps: i) providing a microemulsion according to any of claims 1 to 9, ii) diffusing the microemulsion provided in step i), preferably by sticks made from reed, paper or plastic.

12. Home care product or body care product comprising the diffusible microemulsion according to any of claims 1 to 9.

13. A scent kit comprising or consisting ofI) the diffusible microemulsion according to any of claims 1 to 9,II) at least one stick, preferably made from reed, paper or plastic,III) and optionally: a diffusor.

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