Emulsion for aromatic device

Abstract

The present invention relates to a liquid fragrance device and a specific emulsion for use in the liquid fragrance device.

Description

Technical Field

[0001] The present invention relates to a liquid fragrance device and a specific emulsion for use in the liquid fragrance device.

Background Art

[0002] Fragrance products are generally consumer products that emit scents and are used in small indoor spaces such as toilets, entrances, corridors, and front gardens in homes and commercial facilities, as well as in large indoor spaces such as hotel lobbies, car dealerships, spa facilities, and public arenas.

[0003] Many liquid fragrances are commercially available in various forms, such as reed or core diffusers, electric plug-in devices, or aerosols or sprays. The perfume composition of the fragrance may be a true solution or a colloidal solution such as a microemulsion.

[0004] EP2629807B1 claims a liquid reed diffuser fragrance composition comprising (a) an oil phase containing 0.1% to 60% by weight of a fragrance, (b) at least 10% by weight of water, (c) a fragrance vehicle containing at least one mono-, di- or polyglycol ether, and (d) an amphiphilic solubilizer.

[0005] EP2810663B1 describes a fragrance composition comprising at least two different fragrance accords, wherein at least 30 weight percent of each fragrance accord comprises the major contributor(s) of the fragrance accord, and the average of the odor detection thresholds of the major contributor(s) of each fragrance accord is within the same order as the average of the odor detection thresholds of the major contributor(s) of the other fragrance accord; and the base note(s) of each fragrance accord constitute less than 15 percent of the notes of the accord. The composition is particularly useful for reed diffusers.

[0006] WO20161196601A1 relates to a fragrance composition comprising a fragrance compound and a solvent or carrier, wherein at least 10% by weight, based on the total weight of the solvent and carrier of the fragrance composition, is one or more specific low vapor pressure volatile organic compounds (VOCs). The novel fragrance composition is particularly well-suited for air care devices such as reed diffusers.

[0007] GB2474042B2 claims a method of slowly releasing the properties of a composition into the environment for the purpose of blending valerian oil with other essential oils, water, a dispersant, and using a reed diffuser to help relieve stress and related symptoms in humans and other mammals. Preferably, the composition comprises valerian, vetivert, sweet basil and sage oil. A preferred dispersant is 3-methyl-3-methoxybutyl acetate.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0009] Conventional liquid air fresheners contain high levels of volatile organic compound (VOC) solvents such as, for example, dipropylene glycol methyl ether (Dowanol DPM), which are expensive, not preferred due to environmental and safety concerns, and may raise regulatory concerns. Thus, many conventional air freshener formulations, including water-based formulations, impose limitations on the creativity of fragrances and the levels of fragrances that can be employed due to solubility or solubilization issues of the fragrances. For example, a liquid air freshener containing perfume and a high level of water often requires a large amount of solubilizers such as surfactants to achieve the desired transparency and stability of the final product. Such products may contain only a low perfume content, resulting in poor indoor impact during use, or may contain an excessive amount of solubilizers for a high perfume dosage, thereby affecting the fragrance performance over time, such as fragrance release due to clogging of the wick, which is unsatisfactory. Furthermore, conventional water-based air fresheners often suffer from certain drawbacks and limitations. Thus, the fragrance performance, product lifespan, aesthetic appearance, or temperature stability of the product over time may be limited or unacceptable, resulting in unsatisfactory performance.

[0010] In particular, reed diffuser compositions generally are based on expensive and sometimes ecologically harmful solvents such as, for example, dipropylene glycol monomethyl ether (DPM). For these reasons, the perfume industry is seeking alternatives, preferably water-based systems. However, water-based systems either do not function well technically or mostly tolerate only a low perfume content. As a result, the indoor impact during use is poor. To obtain the same fragrance performance in a typical system, the same amount of fragrance has to be provided in the aqueous phase. To solubilize this perfume content, the content of solubilizers has to be increased significantly. Unfortunately, the use of a large amount of non-volatile solubilizers causes the wick to clog within a very short period of use, making further evaporation impossible.

[0011] The use of high levels of solubilizers can result in the suppression or poor release of fragrance through delivery devices such as wicks and reeds, as the solubilizer clogs the capillary channels within the diffuser. As a result, it can lead to unacceptable product performance, such as limited performance over time. Therefore, there is a need for improved aqueous fragrance formulations to address these and other issues.

[0012] A composite object of the present invention, as described above, was to solve the problems and drawbacks of aqueous-based formulations and to provide a specific composition for use in fragrance devices, particularly wick or reed diffusers. Thus, in the context of the present invention, the composition should be an aqueous formulation, which thereby increases the amount of perfume oil that can be added with a low solubilizer content, optimizes the solubility of the perfume with a combination of a small amount of solvents, and also reduces the risk of the solubilizer clogging the capillary channels of the diffuser, particularly the wick or reed.

Means for Solving the Problems

[0013] The subject of the present invention is a liquid fragrance system, namely (i) a container; (ii) a liquid fragrance composition; and (iii) a liquid fragrance system containing or consisting of a diffuser for diffusing the fragrance composition into the surrounding air, wherein the liquid fragrance composition is an oil-in-water emulsion, (a) an aqueous phase; (b) an oily phase containing at least one perfume or fragrance or perfume oil; (c) at least one surfactant; (d) At least one stabilizer selected from the group consisting of polyacrylate or polymethacrylate thickeners, xanthan gum, gellan gum, guar gum, alginic acid, alginates, agar, carrageenan, welan gum, locust bean gum, tragacanth, gum arabic, pectin, polysaccharides, starch, dextrin, gelatin, casein, modified starch and modified cellulose and mixtures thereof; and optionally (e) contains or consists of at least one other additive and / or adjuvant; wherein the amount of surfactant is 0.4 to 5% by weight based on the total weight of the oily phase, and the oil-in-water emulsion has an average oil droplet size of about 1 to about 15 μm.)

[0014] Surprisingly, in liquid fragrance systems, particularly in wick or reed diffusers, by using an oil-in-water emulsion as defined above, the amount of perfume or fragrance that can be added can be increased and the surfactant concentration can be reduced compared to conventional aqueous-based fragrance formulations, and an equivalent or even improved evaporation performance can be achieved compared to non-aqueous diffusible compositions based on dipropylene glycol monomethyl ether.

[0015] Furthermore, surprisingly, it has been found that the typical clogging problems of diffusers (cores or reeds) associated with the large amounts of surfactants required in conventional fragrance formulations containing aqueous formulations have been significantly reduced.

[0016] As described above, the oil-in-water emulsion has an average oil droplet size of about 1 to about 15 μm. The average oil droplet size can be demonstrated to play an important role in enhancing the stability of the oil-in-water emulsion. In certain preferred embodiments, the oil-in-water emulsion has an average oil droplet size of ≧1 μm and less than 10 μm.

[0017] The size of the oil droplets can be measured by known methods such as the laser diffraction method using known techniques and equipment. For example, Mastersizer 2000 (Malvern Instruments of Malvern, Worchestershire, United Kingdom) can be used.

[0018] Component (a) of the oil-in-water emulsion of the liquid fragrance system according to the present invention is water or a combination of water and a polar solvent that is miscible with water but immiscible with the oil phase. Specific non-limiting examples of such water-miscible solvents include ethanol, DMSO (dimethyl sulfoxide), DPG (dipropylene glycol), or PEG (polyethylene glycol). Preferably, the aqueous phase of the oil-in-water emulsion of the present invention is pure water.

[0019] The aqueous proportion is 25 to 99.9% by weight, preferably 50 to 99% by weight, more preferably 80 to 98% by weight, particularly preferably 85 to 97% by weight, and most preferably 89 to 96% by weight based on the total weight of the oil-in-water emulsion.

[0020] Component (b) of the oil-in-water emulsion of the liquid fragrance system according to the present invention is an oily phase containing at least one perfume or fragrance or essential oil; ultimately, when there is a need for olfaction, the at least one perfume or fragrance or essential oil can be mixed with DPM (dipropylene glycol methyl ether) or ethanol.

[0021] In a preferred embodiment, component (b) of the oil-in-water emulsion of the liquid fragrance system according to the present invention consists of at least one perfume or fragrance or essential oil.

[0022] In a further preferred embodiment, component (b) of the oil-in-water emulsion of the liquid fragrance system according to the present invention does not contain dipropylene glycol methyl ether and / or ethanol.

[0023] The proportion of component (b) is 0.1 to 75% by weight, preferably 1 to 50% by weight, more preferably 2 to 20% by weight, particularly preferably 2 to 10% by weight, and most preferably 3 to 8% by weight based on the total weight of the oil-in-water emulsion.

[0024] The mixing ratio of component (a) and component (b) is preferably in the range of 999.09:0.01 to 250:750, preferably 990:10 to 500:500, and more preferably 900:50 to 850:150.

[0025] The selection of at least one fragrance, aroma substance or essential oil of component (b) is not in itself important and is solely determined by the desired use. The only limiting factor is that they must exist as an oil or be sufficiently oil-soluble. Thus, at least one fragrance or aroma substance of component (b) is a hydrophobic or lipophilic substance.

[0026] In a preferred embodiment, the amount of at least one fragrance, aroma substance or essential oil in the oil-in-water emulsion of the liquid fragrance system according to the present invention is 0.1 to 75% by weight, preferably 1 to 50% by weight, more preferably 2 to 20% by weight, particularly preferably 2 to 10% by weight, and most preferably 3 to 8% by weight based on the total weight of the oil-in-water emulsion.

[0027] The perfume substance or aroma substance is here understood to mean a compound used mainly for the purpose of imparting or modifying an odor. In other words, in order to be regarded as a perfume substance, such a component must be recognized by those skilled in the art as being able to impart or modify the odor of the composition in at least a positive or pleasant way. For the purposes of the present invention, the terms "essential oil" or "aroma" include combinations of perfume ingredients for changing or imparting an odor.

[0028] The following specified fragrance or aroma substances can be used in a number of fragrances or aroma mixtures selected from a wide range of natural and synthetic substances, either as individual substances or as mixtures with at least one other fragrance or aroma substance. However, the list of these active substances and other ingredients is non-limiting and may include further active ingredients and other ingredients not further elucidated below.

[0029] Fragrance or aroma substances that are advantageously suitable for combinations are described, for example, in S. Arctander, Perfume and Flavor Materials, volume I and II, Montclair, N.J. 1969, private publication, and / or H. Surburg, J. Panten, Common Fragrance and Flavor Materials, 6th edition, Wiley-VCFI, Weinheim 2016. The following list contains examples of known odor or aroma substances. Fragrances and perfumes may be mixtures of natural scents such as those obtained from plant sources, examples of which include extracts of natural raw materials such as, for example, essential oils, concretes, absolutes, resins, resinoids, balsams, tinctures: ambergris tincture; amaryllis oil; angelica seed oil; angelica root oil; anise oil; valerian oil; basil oil; tree moss absolute; bay oil; artemisia oil; benzoin resin; bergamot oil; beeswax absolute; birch tar oil; bitter almond oil; celery oil; butch leaf oil; cubeb oil; cade oil; calamus oil; camphor oil; cananga oil; cardamom oil; cassia oil; cascarilla oil; cassia oil; cassie absolute; castoreum absolute cedar leaf oil; cederwood oil; cistus oil; citronella oil; lemon oil; copaiba balsam; copaiba balsam oil; coriander oil; costus root oil; cumin oil; hinoki oil; davana oil; dill weed oil; dill seed oil; orris absolute; oak moss absolute; elemi oil; tarragon oil; eucalyptus citriodora oil; eucalyptus oil; fennel oil; pine needle oil; galbanum oil; galbanum resin; geranium oil; grapefruit oil; guaiacwood oil; gurjun balsam; gurjun balsam oil; helichrysum absolute; helichrysum oil; ginger oil; iris root absolute; iris root oil; jasmine absolute; calamus oil; blue chamomile oil; roman chamomile oil; carrot seed oil; cascarilla oil; pine needle oil; spearmint oil; caraway oil; labdanum oil; labdanum absolute; labdanum resin; lavandin absolute; lavandin oil; lavender absolute; lavender oil; lemongrass oil; labège oil; distilled lime oil; pressed lime oil; linaloe oil; litsea cubeba oil; bay leaf oil; mace oil; marjoram oil; mandarin oil; massoia bark oil; mimosa absolute; amblet oil; musk tincture; muscatel sage oil; nutmeg oil; myrrh absolute; myrrh oil; myrtle oil clove leaf oil; clove bud oil; neroli oil;Olibanum absolute; olibanum oil; opopanax oil; orange blossom absolute; orange oil; origanum oil; palmarosa oil; patchouli oil; perilla oil; peru balsam oil; parsley leaf oil; parsley seed oil; petitgrain oil; peppermint oil; pepper oil; pimento oil; pine oil; pennyroyal oil; rose absolute; rosewood oil; rose oil; rosemary oil; dalmatian sage oil; spanish sage oil; sandalwood oil; celery seed oil; spike lavender oil; star anise oil; styrax oil; tagetes oil; cypress oil; tea tree oil; turpentine oil; thyme oil; tolu balsam; tonka absolute; tuberose absolute; vanilla extract; violet leaf absolute; verbena oil; vetiver oil; juniper berry oil; cognac oil; absinthe oil; wintergreen oil; ylang ylang oil; hyssop oil; civet absolute; cinnamon leaf oil; cinnamon bark oil and their fractions or components isolated therefrom, etc.; For example, 3-carene; α-pinene; β-pinene; α-terpinene; γ-terpinene; p-cymene; bisabolene; camphene; caryophyllene; cedrene; farnesene; limonene; longifolene; myrcene; ocimene; valencene; (E,Z)-1,3,5-undecatriene; styrene; diphenylmethane, etc.; For example, aliphatic aldehydes such as hexanal; heptanal; octanal; nonanal; decanal; undecanal; dodecanal; tridecanal; 2-methyloctanal; 2-methylnonanal; (E)-2-hexenal; (Z)-4-heptenal; 2,6-dimethyl-5-heptenal; 10-undecenal; (E)-4-decenal; 2-dodecenal; 2,6,10-trimethyl-9-undecenal; 2,6,10-trimethyl-5,9-undecadienal; aliphatic acetals such as heptanal diethyl acetal; 1,1-dimethoxy-2,2,5-trimethyl-4-hexene; citronellyloxyacetaldehyde; 1-(1-methoxypropoxy)-(E / Z)-3-hexene; For example, cycloaliphatic aldehydes such as 2,4-dimethyl-3-cyclohexenecarbaldehyde; 2-methyl-4-(2,2,6-trimethyl-cyclohexen-1-yl)-2-butenal; 4-(4-hydroxy-4-methylpentyl)-3-cyclohexenecarbaldehyde; 4-(4-methyl-3-penten-1-yl)-3-cyclohexenecarbaldehyde; For example, aromatic and araliphatic aldehydes such as benzaldehyde; phenylacetaldehyde; 3-phenylpropanal; hydratropic aldehyde; 4-methylbenzaldehyde; 4-methylphenylacetaldehyde; 3-(4-ethylphenyl)-2,2-dimethylpropanal; 2-methyl-3-(4-isopropylphenyl)propanal; 2-methyl-3-(4-tert-butylphenyl)propanal; 2-methyl-3-(4-isobutylphenyl)propanal; 3-(4-tert-butylphenyl)propanal; cinnamaldehyde; α-butylcinnamaldehyde; α-amylcinnamaldehyde; α-hexylcinnamaldehyde; 3-methyl-5-phenylpentanal; 4-methoxybenzaldehyde; 4-hydroxy-3-methoxybenzaldehyde; 4-hydroxy-3-ethoxybenzaldehyde; 3,4-methylenedioxybenzaldehyde; 3,4-dimethoxybenzaldehyde; 2-methyl-3-(4-methoxyphenyl)propanal; 2-methyl-3-(4-methylenedioxyphenyl)propanal; For example, esters of aliphatic carboxylic acids such as (E)- and (Z)-hexenyl formate; ethyl acetate; isoamyl acetate; hexyl acetate; 3,5,5-trimethylhexyl acetate; 3-methyl-2-butenyl acetate; (E)-2-hexenyl acetate; (E)- and (Z)-3-hexenyl acetate; octyl acetate; 3-octyl acetate; 1-octen-3-yl acetate; ethyl butyrate; butyl butyrate; isoamyl butyrate; hexyl butyrate; (E)- and (Z)-3-hexenyl isobutyrate; hexyl crotonate; ethyl isovalerate; ethyl 2-methylpentanoate; ethyl hexanoate; allyl hexanoate; ethyl heptanoate; allyl heptanoate; ethyl octanoate; ethyl (E,Z)-2,4-decadienoate; methyl 2-octynoate; methyl 2-nonynoate; allyl 2-isoamyloxyacetate; methyl 3,7-dimethyl-2,6-octadienoate; 4-methyl-2-pentyl crotonate; For example, esters of cyclic alcohols such as 2-tert-butylcyclohexyl acetate; 4-tert-butylcyclohexyl acetate; 2-tert-pentylcyclohexyl acetate; 4-tert-pentylcyclohexyl acetate; 3,3,5-trimethylcyclohexyl acetate; decahydro-2-naphthyl acetate; 2-cyclopentylcyclopentyl crotonate; 3-pentyltetrahydro-2H-pyran-4-yl acetate; decahydro-2,5,5,8a-tetramethyl-2-naphthyl acetate; 4,7-methano-3a,4,5,6,7,7a-hexahydro-5- or 6-indenyl acetate; 4,7-methano-3a,4,5,6,7,7a-hexahydro-5- or 6-indenyl propionate; 4,7-methano-3a,4,5,6,7,7a-hexahydro-5- or 6-indenyl isobutyrate; 4,7-methanooctahydro-5- or 6-indenyl acetate; For example, esters of aliphatic alcohols such as benzyl acetate; benzyl propionate; benzyl isobutyrate; benzyl isovalerate; 2-phenylethyl acetate; 2-phenylethyl propionate; 2-phenylethyl isobutyrate, and esters of aliphatic carboxylic acids such as 2-phenylethyl isovalerate; 1-phenylethyl acetate; α-trichloromethylbenzyl acetate; α,α-dimethylphenylethyl acetate; α,α-dimethylphenylethyl butyrate; cinnamyl acetate; 2-phenoxyethyl isobutyrate; 4-methoxybenzyl acetate; Esters of cycloaliphatic alcohols such as, for example, 1-cyclohexylethyl crotonate; esters of cycloaliphatic carboxylic acids such as, for example, allyl-3-cyclohexylpropionate; allyl cyclohexyloxyacetate; cis- and trans-methyldihydrojasmonate; cis- and trans-methyl jasmonate; methyl-2-hexyl-3-oxocyclopentanecarboxylate; ethyl-2-ethyl-6,6-dimethyl-2-cyclohexenecarboxylate; ethyl-2,3,6,6-tetramethyl-1-2-cyclohexenecarboxylate; ethyl-2-methyl-1,3-dioxolane 2-acetate; Aromatic and aliphatic carboxylic acids and their esters such as, for example, benzoic acid; phenylacetic acid; methyl benzoate; ethyl benzoate; hexyl benzoate; benzyl benzoate; methyl phenylacetate; ethyl phenylacetate; geranyl phenylacetate; phenylethyl phenylacetate; methyl cinnamate; ethyl cinnamate; benzyl cinnamate; phenylethyl cinnamate; cinnamyl cinnamate; allyl phenoxyacetate; methyl salicylate; isoamyl salicylate; hexyl salicylate; cyclohexyl salicylate; cis-3-hexenyl salicylate; benzyl salicylate; phenylethyl salicylate; methyl-2,4-dihydroxy-3,6-dimethylbenzoate; ethyl-3-phenylglycidate; ethyl-3-methyl-3-phenylglycidate; For example, aliphatic alcohols such as hexanol; octanol; 3-octanol; 2,6-dimethylheptanol; 2-methyl-2-heptanol; 2-methyl-2-octanol; (E)-2-hexenol; (E)- and (Z)-3-hexenol; 1-octen-3-ol; a mixture of 3,4,5,6,6-pentamethyl-3,4-hepten-2-ol and 3,5,6,6-tetramethyl-4-methylenheptan-2-ol; (E,Z)-2,6-nonadienol; 3,7-dimethyl-7-methoxyoctan-2-ol; 9-decenol; 10-undecenol; 4-methyl-3-decen-5-ol; For example, aliphatic ketones and their oximes such as 2-heptanone; 2-octanone; 3-octanone; 2-nonanone; 5-methyl-3-heptanone; 5-methyl-3-heptanone oxime; 2,4,4,7-tetramethyl-6-octen-3-one; 6-methyl-5-hepten-2-one; For example, aliphatic sulfur-containing compounds such as 3-methylthiohexanol; 3-methylthiohexyl acetate; 3-mercaptohexanol; 3-mercaptohexyl acetate; 3-mercaptohexyl butyrate; 3-acetylthiohexyl acetate; 1-menthene-8-thiol; For example, aliphatic nitriles such as 2-nonenoic acid nitrile; 2-undecenoic acid nitrile; 2-tridecenoic acid nitrile; 3,12-tridecadienoic acid nitrile; 3,7-dimethyl-2,6-octadienoic acid nitrile; 3,7-dimethyl-6-octenoic acid nitrile; For example, acyclic terpene alcohols such as citronellol; geraniol; nerol; linalool; lavandulol; nerolidol; farnesol; tetrahydrolinalool; tetrahydrogeraniol; 2,6-dimethyl-7-octen-2-ol; 2,6-dimethyloctan-2-ol; 2-methyl-6-methylene-7-octen-2-ol; 2,6-dimethyl-5,7-octadien-2-ol; 2,6-dimethyl-3,5-octadien-2-ol; 3,7-dimethyl-4,6-octadien-3-ol; 3,7-dimethyl-1,5,7-octatriene-3-ol; 2,6-dimethyl-2,5,7-octatriene-1-ol; acyclic terpene formates such as acetate, propionate, isobutyrate, butyrate, isovalerate, pentanoate, hexanoate, crotonate, tiglate and 3-methyl-2-butenoate; For example, acyclic terpene aldehydes such as geranial; neral; citronellal; 7-hydroxy-3,7-dimethyloctanal; 7-methoxy-3,7-dimethyloctanal; 2,6,10-trimethyl-9-undecenal; geranylacetone and acyclic terpene ketones such as dimethyl and diethyl acetals of geranial, neral, 7-hydroxy-3,7-dimethyloctanal; For example, cyclic terpene alcohols such as menthol; isopulegol; α-terpineol; terpinolene-4; menthan-8-ol; menthan-1-ol; menthan-7-ol; borneol; isoborneol; linalool oxide; nopol; cedrol; ambrinol; vetiverol; guaiol and formates of cyclic terpene alcohols such as acetate, propionate, isobutyrate, butyrate, isovalerate, pentanoate, hexanoate, crotonate, tiglate and 3-methyl-2-butenoate; For example, cyclic terpene aldehydes such as menthone; isomenthone; 8-mercaptomenthen-3-one; carvone; camphor; fenthion; α-ionone; β-ionone; α-n-methyliornone; β-n-methyliornone; α-isomethyliornone; β-isomethyliornone; α-irone; α-damascone; β-damascone; β-damascenone; δ-damascone; γ-damascone and, for example, 1-(2,4,4-trimethyl-2-cyclohexen-1-yl)-2-buten-1-one; 1,3,4,6,7,8a-hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalene-8(5H)-one; 2-methyl-4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-butenal; nootkatone; dihydronootkatone; 4,6,8-megastigmatrien-3-one; α-sinensal; β-sinensal; acetylated cedrol oil (methyl cedryl ketone) and other cyclic terpene ketones; For example, cyclic alcohols such as 4-tert-butylcyclohexanol; 3,3,5-trimethylcyclohexanol; 3-isocamphylcyclohexanol; 2,6,9-trimethyl-Z2,Z5,E9-cyclododecatrien-1-ol; 2-isobutyl-4-methyltetrahydro-2H-pyran-4-ol; For example, cycloaliphatic alcohols such as α-3,3-dimethylcyclohexylmethanol; 1-(4-isopropylcyclohexyl)ethanol; 2-methyl-4-(2,2,3-trimethyl-3-cyclopent-1-yl)butanol; 2-methyl-4-(2,2,3-trimethyl-3-cyclopent-1-yl)-2-buten-1-ol; 2-ethyl-4-(2,2,3-trimethyl-3-cyclopent-1-yl)-2-buten-1-ol; 3-methyl-5-(2,2,3-trimethyl-3-cyclopent-1-yl)-pentan-2-ol; 3-methyl-5-(2,2,3-trimethyl-3-cyclopent-1-yl)-4-penten-2-ol; 3,3-dimethyl-5-(2,2,3-trimethyl-3-cyclopent-1-yl)-4-penten-2-ol; 1-(2,2,6-trimethylcyclohexyl)pentan-3-ol; 1-(2,2,6-trimethylcyclohexyl)hexan-3-ol; For example, cyclic and cycloaliphatic ethers such as cineole; cedryl methyl ether; cyclododecyl methyl ether; 1,1-dimethoxycyclododecane; (ethoxymethoxy)cyclododecane; α-cedrene epoxide; 3a,6,6,9a-tetramethyldodecahydronaphtho[2,1-b]furan; 3a-ethyl-6,6,9a-trimethyldodecahydronaphtho[2,1-b]furan; 1,5,9-trimethyl-13-oxabicyclo[10.1.0]trideca-4,8-diene; rose oxide; 2-(2,4-dimethyl-3-cyclohexen-1-yl)-5-methyl-5-(1-methylpropyl)-1,3-dioxane; For example, cyclic ketones such as 4-tert-butylcyclohexanone; 2,2,5-trimethyl-5-pentylcyclopentanone; 2-heptylcyclopentanone; 2-pentylcyclopentanone; for example, 2-hydroxy-3-methyl-2-cyclopenten-1-one; 3-methyl-cis-2-penten-1-yl-2-cyclopenten-1-one; 3-methyl-2-pentyl-2-cyclopenten-1-one; 3-methyl-4-cyclopentadecenone; 3-methyl-5-cyclopentadecenone; 3-methylcyclopentadecanone; 4-(1-ethoxyvinyl)-3,3,5,5-tetramethylcyclohexanone; 4-tert-pentylcyclohexanone; 5-cyclohexadecen-1-one; 6,7-dihydro-1,1,2,3,3-pentamethyl-4(5H)-indanone; 8-cyclohexadecen-1-one; 9-cycloheptadecen-1-one; cyclopentadecanone; cyclohexadecanone and other macrocyclic ketones; For example, cycloaliphatic ketones such as 1-(3,3-dimethyl-cyclohexyl)-4-penten-1-one; 2,2-dimethyl-1-(2,4-dimethyl-3-cyclohexen-1-yl)-1-propanone; 1-(5,5-dimethyl-1-cyclohexen-1-yl)-4-penten-1-one; 2,3,8,8-tetramethyl-1,2,3,4,5,6,7,8-octahydro-2-naphthalenyl methyl ketone; methyl-2,6,10-trimethyl-2,5,9-cyclododecatrienyl ketone; tert-butyl-(2,4-dimethyl-3-cyclohexen-1-yl) ketone; For example, aromatic hydrocarbons such as styrene and diphenylmethane; For example, araliphatic alcohols such as benzyl alcohol; 1-phenylethyl alcohol; 2-phenylethyl alcohol; 3-phenylpropanol; 2-phenylpropanol; 2-phenoxyethanol; 2,2-dimethyl-3-phenylpropanol; 2,2-dimethyl-3-(3-methylphenyl)propanol; 1,1-dimethyl-2-phenylethyl alcohol; 1,1-dimethyl-3-phenylpropanol; 1-ethyl-1-methyl-3-phenylpropanol; 2-methyl-5-phenylpentanol; 3-methyl-5-phenylpentanol; 3-phenyl-2-propen-1-ol; 4-methoxybenzyl alcohol; 1-(4-isopropylphenyl)ethanol; For example, araliphatic ethers such as 2-phenylethyl methyl ether; 2-phenylethyl isoamyl ether; 2-phenylethyl-1-ethoxyethyl ether; phenylacetaldehyde dimethyl acetal; phenylacetaldehyde diethyl acetal; hydratropaldehyde dimethyl acetal; phenylacetaldehyde glycerol acetal; 2,4,6-trimethyl-4-phenyl-1,3-dioxane; 4,4a,5,9b-tetrahydroindeno[1,2-d]-m-dioxin; 4,4a,5,9b-tetrahydro-2,4-dimethylindeno[1,2-d]-m-dioxin; For example, aromatic ketones such as acetophenone; 4-methyl-acetophenone; 4-methoxyacetophenone; 4-tert-butyl-2,6-dimethylacetophenone; For example, araliphatic ketones such as 4-phenyl-2-butanone; 4-(4-hydroxyphenyl)-2-butanone; 1-(2-naphthalenyl)ethanone; 2-benzofuranylethanone; (3-methyl-2-benzofuranylethanone); benzophenone; 1,1,2,3,3,6-hexamethyl-5-indanyl methyl ketone; 6-tert-butyl-1,1-dimethyl-4-indanyl methyl ketone; 1-[2,3-dihydro-1,1,2,6-tetramethyl-3-(1-methylethyl)-1H-5-indenyl]ethanone; 5’,6’,7’,8’-tetrahydro-3’,5’,6’,8’,8’-hexamethyl-2-acetonaphthone; For example, nitrogen aromatic compounds such as 2,4,6-trinitro-1,3-dimethyl-5-tert-butylbenzene; 3,5-dinitro-2,6-dimethyl-4-tert-butylacetophenone; cinnamitrile; 3-methyl-5-phenyl-2-pentenenitrile; 3-methyl-5-phenylpentanenitrile; methyl anthranilate; methyl N-methylanthranilate; Schiff base of methyl anthranilate and 7-hydroxy-3,7-dimethyloctanal, 2-methyl-3-(4-tert-butylphenyl)propanal or 2,4-dimethyl-3-cyclohexenecarbaldehyde; 6-isopropylquinoline; 6-isobutylquinoline; 6-sec-butylquinoline; 2-(3-phenylpropyl)pyridine; indole; skatole; 2-methoxy-3-isopropylpyrazine; 2-isobutyl-3-methoxypyrazine; For example, phenols, phenyl ethers, phenyl esters such as estragole; anethole; eugenol; eugenyl methyl ether; isoeugenol; isoeugenyl methyl ether; thymol; carvacrol; diphenyl ether; β-naphthyl methyl ether; β-naphthyl ethyl ether; β-naphthyl isobutyl ether; 1,4-dimethoxybenzene; eugenyl acetate; 2-methoxy-4-methylphenol; 2-ethoxy-5-(1-propenyl)phenol; p-cresyl phenyl acetate; For example, heterocyclic compounds such as 2,5-dimethyl-4-hydroxy-2H-furan-3-one; 2-ethyl-4-hydroxy-5-methyl-2H-furan-3-one; 3-hydroxy-2-methyl-4H-pyran-4-one; 2-ethyl-3-hydroxy-4H-pyran-4-one; For example, lactones such as 1,4-octanolide; 3-methyl-1,4-octanolide; 1,4-nonanolide; 1,4-decanolide; 8-decen-1,4-olide; 1,4-undecanolide; 1,4-dodecan-olide; 1,5-decanolide; 1,5-dodecanolide; 4-methyl-1,4-decanolide; 1,15-pentadecanolide; cis- and trans-11-pentadecen-1,15-olide; cis- and trans-12-pentadecen-1,15-olide; 1,16-hexadecanolide; 9-hexadecen-1,16-olide; 10-oxa-1,16-hexadecanolide; 11-oxa-1,16-hexadecanolide; 12-oxa-1,16-hexadecanolide; ethylene-1,12-dodecanedioate; ethylene-1,13-tridecanedioate; coumarin; 2,3-dihydrocoumarin; octahydrocoumarin; and mixtures of the above substances.

[0030] The oil-in-water emulsion of the liquid fragrance system according to the present invention also contains at least one surfactant or emulsifier. The selection of the at least one surfactant has a great influence on the properties of the emulsion, especially in order to maintain the stability of the emulsion.

[0031] Surfactants are classified by the hydrophilic-lipophilic balance (HLB) number, which is used as a measure of the ratio of these groups and is useful for identifying surfactants for oil-water emulsions. The HLB number is a value between 0 and 20 and defines the affinity of the surfactant for water or oil. The HLB values are calculated for non-ionic surfactants, which have numerical values from 0 to 20. An HLB of 10 or more indicates an affinity for water (hydrophilicity), and an HLB of less than 10 indicates an affinity for oil (lipophilicity). To form and stabilize the oil-in-water macroemulsion according to the present invention, at least one surfactant with an HLB number of 8 to 18 is used. Preferably, a surfactant having an HLB number between 10 and 14 is used. In the most preferred variant, the macroemulsion of the present invention contains at least one surfactant having an HLB number between 11 and 13.

[0032] According to the present invention, it has been demonstrated that artificial spider silk fibers can be produced by extruding chemically modified recombinant spidroin into a low pH solution based on the results of fiber spinning experiments.

[0033] At least one surfactant or emulsifier used in the oil-in-water emulsion of the liquid fragrance system according to the present invention is selected from the group consisting of nonionic surfactants, anionic surfactants, amphoteric surfactants, and mixtures thereof.

[0034] Typical examples of nonionic surfactants include fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, alkoxylated triglycerides, optionally partially oxidized alk(en)yl oligoglycosides or glucuronic acid derivatives, fatty acid-N-alkyl glucamides, protein hydrolysates (especially wheat-based plant products), polyol fatty acid esters, sucrose esters, sorbitan esters, polysorbates, and aminoxides.

[0035] Representative anionic surfactants or emulsifiers include aliphatic fatty acids having 12 to 22 carbon atoms such as palmitic acid, stearic acid or behenic acid, and dicarboxylic acids having 12 to 22 carbon atoms such as azelaic acid or sebacic acid. Representative examples of anionic surfactants are soaps, alkylbenzene sulfonates, alkane sulfonates, olefin sulfonates, alkyl ether sulfonates, glyceryl ether sulfonates, a-methyl ester sulfonates, sulfofatty acids, alkyl sulfates, alkyl ether sulfates, glyceryl ether sulfates, fatty acid ether sulfates, hydroxy mixed ether sulfates, monoglyceride (ether) sulfates, fatty acid amide (ether) sulfates, mono- and dialkyl sulfosuccinates, mono- and dialkyl sulfosuccinamic acids, sulfotriglycerides, amide soaps, ether carboxylic acids and their salts, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurides, N-acyl amino acids such as acyl lactylates, acyl tartrates, acyl glutamates and acyl aspartates, alkyl oligoglycoside sulfates, protein fatty acid condensates (especially wheat-based plant products) and alkyl (ether) phosphates and the like.

[0036] Furthermore, zwitterionic surfactants can be used as surfactants or emulsifiers. A surfactant compound having at least one quaternary ammonium group, at least one carboxylate group and one sulfonate group in the molecule is called a zwitterionic surfactant. Particularly preferred zwitterionic surfactants are so-called betaines, such as N-alkyl-N,N-dimethylammonium glycinate, such as coconut alkyl dimethylammonium glycinate, N-acylaminopropyl-N,N-dimethylammonium glycinate, such as coconut acylaminopropyl dimethylammonium glycinate, 2-alkyl-3-carboxymethyl-3-hydroxyethylimidazoline having 8 to 18 C atoms in the alkyl group or acyl group respectively, and coconut acylaminoethyl hydroxyethyl carboxymethyl glycinate and the like. Particularly preferred is the fatty acid amide derivative known as cocamidopropyl betaine by CTFA name. A more suitable emulsifier is an amphoteric surfactant. An amphoteric surfactant is understood to refer to a surfactant compound that contains at least one free amino group and at least one -COOH- group or -SO3H group in addition to one C8 / 18 alkyl group or acyl group in the molecule and can form an inner salt. Examples of suitable amphoteric surfactants are N-alkyl glycine, N-alkyl propionic acid, N-alkyl aminobutyric acid, N-alkyliminodipropionic acid, N-hydroxyethyl-N-alkylamidopropyl glycine, N-alkyl taurine, N-alkyl sarcosine, 2-alkylaminopropionic acid and alkylaminoacetic acid having about 8 to 18 C atoms in the alkyl group respectively. Particularly preferred amphoteric surfactants are N-coconut alkyl aminopropionate, coconut acylaminoethyl aminopropionate and C12 / 18 acyl sarcosine. Representative examples of amphoteric or zwitterionic surfactants include alkyl betaines, alkyl amide betaines, aminopropionates, amino glycinate, imidazolinium betaines and sulfobetaines. The above surfactants are exclusively known compounds.Typical further examples of particularly suitable surfactants are fatty alcohol polyglycol ether sulfates, monoglyceride sulfates, mono- and / or dialkyl sulfosuccinates, fatty acid isethionates, fatty acid sarcosinates, fatty acid taurides, fatty acid glutamates, α-olefin sulfonates, ether carboxylic acids, alkyl oligoglycosides, fatty acid glucamides, alkyl amidobetaines, amphoacetals and / or protein fatty acid condensates, the latter preferably being based on wheat protein.

[0037]

Table 1

[0038]

Table 2

[0039]

Table 3

[0040]

Table 4

[0041]

Table 5

[0042] In a preferred embodiment, at least one surfactant is a nonionic surfactant or an emulsifier. Non-limiting examples of nonionic surfactants that may be mentioned include those belonging to the following classes: · C12 / 18 fatty acid monoesters and diesters with 1 to 30 moles of ethylene oxide added to glycerol; · Glycerol mono- and diesters, sorbitan mono- and diesters of saturated and unsaturated fatty acids having 6 to 22 carbon atoms and ethylene oxide adducts thereof; · Polyol esters, especially polyglycerol esters such as, for example, polyglycerol polyricinoleate, polyglycerol poly-12-hydroxystearate or polyglycerol dimereate isostearate. Mixtures of compounds of these classes are also suitable; · 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 (e.g., sorbitol), alkyl glucosides (e.g., methyl glucoside, butyl glucoside, lauryl glucoside) and polyglucosides (e.g., cellulose) · Products obtained by adding 2 to 30 moles of ethylene oxide and / or 0 to 5 moles of propylene oxide to linear fatty alcohols having 8 to 22 carbon atoms, fatty acids having 12 to 22 carbon atoms, alkylphenols having 8 to 15 carbon atoms in the alkyl group, and alkylamines having 8 to 22 carbon atoms in the alkyl radical; · Alkyl and / or alkenyl oligoglycosides in which the alkyl(ene)yl radical has 8 to 22 carbon atoms, and their ethoxylated analogs; · Castor oil and / or hydrogenated castor oil to which 1 to 15 mol of ethylene oxide has been added; · Products obtained by adding 15 to 60 moles of ethylene oxide to castor oil and / or hydrogenated castor oil; · Partial esters of glycerol and / or sorbitan with unsaturated, linear or saturated, branched fatty acids having 12 to 22 carbon atoms and / or hydroxycarboxylic acids having 3 to 18 carbon atoms and adducts of these with 1 to 30 mol of ethylene oxide; · Partial esters of polyglycerin (average degree of self-condensation 2 to 8), polyethylene glycol (molecular weight 400 to 5000 g / mol), trimethylolpropane, pentaerythritol, sugar alcohol (such as sorbitol), alkyl glycoside (such as methyl glycoside, butyl glycoside, lauryl glycoside), and partial esters with saturated and / or unsaturated linear or branched polyglycosides (such as cellulose). Methyl glycoside, butyl glycoside, lauryl glycoside), polyglycosides (such as cellulose) with saturated and / or unsaturated, linear or branched fatty acids having 12 to 22 carbon atoms and / or hydroxycarboxylic acids having 3 to 18 carbon atoms and adducts of these with 1 to 30 mol of ethylene oxide; · Mixed esters of pentaerythritol, fatty acids, citric acid and fatty alcohols and / or fatty acids having 6 to 22 carbon atoms, methyl glucose and polyols, preferably glycerol or polyglycerol, mono-, di- and trialkyl phosphates, mono-, di- and / or tri-PEG alkyl phosphates and mixed esters of their salts; · Alkyl and / or alkenyl oligoglycosides; · Lanolin alcohol · Polysiloxane-polyalkyl-polyether copolymers or corresponding derivatives; block copolymers, for example, PEG-30 dipolyglyceryl hydroxystearate; · Polymer emulsifiers, for example, Pemulen types (TR-1, TR-2) from Goodrich or · Cosmedia® SP from Cognis; · Polyalkylene glycol and glycerol carbonate.

[0043] Hereinafter, particularly preferred emulsifiers will be described in more detail. Alkoxylates mean addition products of ethylene oxide and / or propylene oxide to fatty alcohols, fatty acids, alkylphenols or castor oil, which are known commercially available products. These are homologous mixtures in which the average degree of alkoxylation corresponds to the ratio of the amount of substance of ethylene oxide and / or propylene oxide to the substrate to which the addition reaction is carried out. The C12 / 18 fatty acid mono- and -diesters of the addition products of ethylene oxide to glycerol are known as refatting agents for cosmetic preparations. Alkyl and / or alkenyl oligoglycosides and their production and use are known from the prior art. In particular, they are produced by reacting glucose or oligosaccharides with primary alcohols having 8 to 18 carbon atoms. Regarding the glycoside radical, both monoglycosides in which the cyclic sugar radical is glycosidically bonded to the fatty alcohol and oligomeric glycosides with a preferred degree of oligomerization of about 8 are suitable. Here, the degree of oligomerization is a statistical average value based on the homologous distribution typical of such technical products. Partial glycerides, typical examples of suitable partial glycerides include monoglyceryl hydroxystearate, diglyceryl hydroxystearate, monoglyceryl isostearate, diglyceryl isostearate, monoglyceryl oleate, diglyceryl oleate, monoglyceryl ricinoleate, diglyceryl ricinoleate, monoglyceryl linoleate, diglyceryl linoleate, monoglyceryl linolenate, monoglyceryl linolenate, monoglyceryl erucate, diglyceryl erucate, monoglyceryl tartrate, diglyceryl tartrate, monoglyceryl citrate, diglyceryl citrate, monoglyceryl malate, diglyceryl malate and technical mixtures thereof. It is also preferable to add 1 to 30, preferably 5 to 10 mol of ethylene oxide to the above partial glycerides. Sorbitan esters refer to suitable sorbitan esters including sorbitan monoisostearate, sorbitan sesquisoisostearate, sorbitan diisostearate, sorbitan triisostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan dioleate, sorbitan trioleate, sorbitan monoeluate, sorbitan sesquieluate, sorbitan dieluate, sorbitan trieluate, sorbitan monoricinoleate, sorbitan sesquiricinoleate, sorbitan diricinoleate, sorbitan triricinoleate, sorbitan monohydroxystearate, sorbitan sesquihydroxystearate, 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 and technical mixtures thereof. Also preferred are those obtained by adding 1 to 30, preferably 5 to 10 mol of ethylene oxide to the above sorbitan esters. A polyglycerol ester, typical examples of suitable polyglycerol esters include polyglyceryl-2-dipolyhydroxystearate (Dehymuls® PGPH), polyglyceryl-3-diisostearate (Lameform® TGI), polyglyceryl-4-isostearate (Isolan® Gl 34), polyglyceryl-3-oleate (distearoyl polyglyceryl-3 oleate), etc., polyglyceryl-4 isostearate (Isolan® Gl 34), polyglyceryl-3 oleate, polyglyceryl-3 diisostearoyl diisostearate (Isolan® PDI), polyglyceryl-3 methyl glucose distearate (Tego Care® 450), polyglyceryl-3 beeswax (Cera Beilina®), polyglyceryl-4 caprate (polyglyceryl T2010 / 90 caprate), polyglyceryl-3 cetyl ether (Chimexane® NL), polyglyceryl-3 distearate (Cremophor® GS 32) and polyglyceryl polyricinoleate (Admul® WOL 1403), dimethylpolyglyceryl isostearate, and mixtures thereof. Further examples of suitable polyol esters are mono-, di- and triesters of trimethylolpropane or pentaerythritol, which can optionally be reacted with 1 to 30 moles of ethylene oxide and lauric acid, coconut fatty acid, tallow fatty acid, palmitic acid, stearic acid, oleic acid, behenic acid, etc.

[0044] The above surfactant can be used alone or in combination of two, three, four or more surfactants, preferably as a mixture of two or three surfactants. The selection of such a surfactant system depends on the structure and polarity of the substance of component (b) to be emulsified and the remaining components of the oil phase of the macroemulsion. In a preferred embodiment of the present invention, a surfactant composition which is a combination of an ionic surfactant and a non-ionic surfactant, i.e., a combination of surfactants having different HLB values, is used for the preparation and stabilization of the oil-in-water emulsion. The ionic surfactant imparts a charge to the surface of the droplets. As a result, the electrostatic charge prevents the coalescence of the droplets. On the other hand, the non-ionic surfactant prevents the diffusion at the interface. The ratio of the ionic surfactant to the non-ionic surfactant, and thus the resulting HLB value, is adjusted according to the final emulsion system. The oil-in-water emulsion of the fragrance system according to the present invention can be most preferably stabilized by a surfactant composition showing a suitably adapted HLB number. Thus, in another preferred variant, the oil-in-water emulsion of the fragrance system according to the present invention consists of a surfactant composition having a final or average HLB number between 10 and 14, and a final or average HLB number between 11 and 13 most preferably stabilizes the emulsion system.

Brief Description of the Drawings

[0045]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0046] In a preferred embodiment, the oil-in-water emulsion of the liquid fragrance system according to the present invention comprises from 0.4 to 25% by weight, preferably from 1 to 20% by weight, more preferably from 4 to 15% by weight, most preferably from 8 to 12% by weight of a surfactant or emulsifier, or from 0.004 to 18% by weight, preferably from 0.01 to 10% by weight, more preferably from 0.08 to 3% by weight, particularly preferably from 0.2 to 1.5% by weight, most preferably from 0.3 to 1.3% by weight of a surfactant or emulsifier, based on the total weight of the oily or dispersed phase.

[0047] In a more preferred embodiment, the ratio between the surfactant or emulsifier and at least one perfume or fragrance or essential oil is from 0.4:99.6 to 25:75, preferably from 1:99 to 20:80, more preferably from 4:96 to 15:85, most preferably from 8:92 to 14:86.

[0048] The oil-in-water emulsion of the liquid fragrance system according to the present invention further contains at least one stabilizer. Since the concentration of the surfactant is low, the stabilizer is an essential component for stabilizing the emulsion and preventing phase separation (creaming, sedimentation), Ostwald ripening, aggregation processes (aggregation, coagulation, coalescence) or decomposition to inversion. The stabilizer used according to the present invention functions as a thickener or a thickening agent and imparts a preferred rheology profile to the macroemulsion. A thickener or a thickening agent is a substance that can increase the viscosity without substantially changing other properties of the liquid. The stability of the emulsion directly depends on its viscosity. The higher the viscosity, the higher the stability of the macroemulsion. By using a stabilizer, i.e., a thickener, the migration rate of the oil droplets in the macroemulsion is reduced, and as a result, all emulsion-breaking processes are decelerated. Therefore, the emulsion of the present invention is kinetically stabilized. As described above, at least one stabilizer is selected from the group consisting of polyacrylate or polymethacrylate thickeners, xanthan gum, gellan gum, guar gum, alginic acid, alginate, agar, carrageenan, welan gum, locust bean gum, tragacanth, gum arabic, pectin, polysaccharide, starch, dextrin, gelatin, casein, modified starch and modified cellulose and mixtures thereof.

[0049] In a preferred embodiment, the oil-in-water emulsion of the liquid fragrance system according to the present invention contains a stabilizer, i.e., a thickener, of up to 1.5% by weight, preferably in the range of 0.1 - 1.3% by weight, more preferably 0.6 - 1.1% by weight, based on the total amount of the macroemulsion.

[0050] In addition to the components described above, the oil-in-water emulsion of the liquid fragrance system according to the present invention may optionally contain additives and / or adjuvants. Preferably, the additives and / or adjuvants are selected from the group consisting of, but not limited to, such components as colorants, preservatives, deposition aids, etc.

[0051] In a preferred embodiment, the oil-in-water emulsion of the liquid fragrance system according to the present invention contains up to 1% by weight, in particular 0.1 - 0.9% by weight, of additives and / or adjuvants.

[0052] In a particularly preferred embodiment, the oil-in-water emulsion of the liquid fragrance system according to the present invention contains or consists of the following components, based on the total weight of the macroemulsion. An aqueous phase of 25 - 99.9% by weight, preferably 50 - 99% by weight, more preferably 80 - 98% by weight, particularly preferably 81 - 97% by weight, most preferably 89 - 96% by weight; An oily phase consisting of 0.1 - 75% by weight, preferably 1 - 50% by weight, more preferably 2 - 20% by weight, particularly preferably 3 - 10% by weight, most preferably 3 - 8% by weight of at least one perfume or aroma substance or essential oil; A surfactant of 0.004 - 18% by weight, preferably 0.01 - 10% by weight, more preferably 0.8 - 3% by weight, particularly preferably 0.2 - 1.5% by weight, most preferably 0.3 - 1.3% by weight; A stabilizer of up to 1.5% by weight, preferably 0.6 - 1.1% by weight; and optionally Additives and / or adjuvants of up to 1% by weight, preferably 0.1 - 0.9% by weight;

[0053] In a more preferred embodiment, the diffuser is a natural or synthetic porous material that allows the diffusion of the fragrance composition. In certain embodiments, the diffuser consists of one or more wicks, reeds, or natural or synthetic porous diffusers. Preferably, the diffuser is selected from the group consisting of wicks, reed diffusers, wood, or cardboard.

[0054] In a more preferred embodiment, the reed diffuser is made of a material selected from the group consisting of wood, fiber, or paper.

[0055] In a more preferred embodiment, the reed diffuser is made of natural wood, preferably coniferous wood.

[0056] In certain embodiments, the diffuser further comprises removable means (e.g., a lid, cap, or other removable closure) for preventing the diffusion of the fragrance composition into the surrounding air. The removable means can prevent the diffusion of the liquid composition before activation of the fragrance system, but can be opened or removed to allow diffusion of the liquid composition upon activation of the fragrance system.

[0057] In a further preferred embodiment, the liquid fragrance system according to the invention is an electric liquid fragrance.

[0058] The present invention further relates to the use of an oil-in-water emulsion as a liquid fragrance composition in a liquid fragrance system, the oil-in-water emulsion comprising or consisting of: (a) an aqueous phase; (b) an oily phase containing at least one perfume, fragrance or essential oil; (c) at least one surfactant; (d) at least one stabilizer selected from the group consisting of polyacrylate or polymethacrylate thickeners, xanthan gum, gellan gum, guar gum, alginic acid, agar, carrageenan, welan gum, locust bean gum, tragacanth, gum arabic, pectin, polysaccharide, starch, dextrin, gelatin, casein, modified starch and modified cellulose and mixtures thereof; and optionally (e) at least one other additive and / or adjuvant; wherein the amount of the surfactant is 0.4 to 5% by weight based on the total weight of the oily phase, and the oil-in-water emulsion has an average oil droplet size of about 1 to about 15 μm.

[0059] In this context, the above description regarding the emulsion (e.g., components (a)-(e), etc.) also applies.

[0060] The present invention further relates to the use of said oil-in-water emulsion having an average oil droplet size ≧ 1 μm and < 15 μm as a liquid fragrance composition in a liquid fragrance system.

[0061] The liquid fragrance system is preferably a wick device or a reed diffuser.

[0062] The present invention further relates to an oil-in-water emulsion containing or consisting of the following: (a) An aqueous phase; (b) An oily phase containing at least one fragrance, aroma or essential oil; (c) At least one surfactant; (d) At least one stabilizer selected from the group consisting of polyacrylate or polymethacrylate thickeners, xanthan gum, gellan gum, guar gum, alginic acid, agar, carrageenan, welan gum, locust bean gum, tragacanth, gum arabic, pectin, polysaccharide, starch, dextrin, gelatin, casein, modified starch and modified cellulose and mixtures thereof; and optionally (e) At least one other additive and / or adjuvant; wherein the amount of the surfactant is 0.4 to 5% by weight based on the total weight of the oily phase, and the oil-in-water emulsion has an average oil droplet size ≧ 1 μm and < 15 μm.

[0063] In this context, the above description regarding the emulsion (e.g., components (a) to (e), etc.) also applies.

[0064] The present invention further relates to the use of said oil-in-water emulsion having an average oil droplet size ≧ 1 μm and < 15 μm as a liquid fragrance composition in a liquid fragrance system.

[0065] The water-in-oil emulsion according to the present invention can be produced by an emulsification method using typical techniques well known as prior art in the field of emulsions. In particular, the water-in-oil emulsion described in this specification is prepared according to the method described in WO2020 / 234196A1.

[0066] The present invention further relates to a method for aromatizing and / or refreshing the ambient air, the method comprising diffusing a liquid fragrance composition as described herein using an apparatus as described herein.

Examples

[0067] The following examples further illustrate the present invention but should not be construed as limiting its scope.

[0068] Example 1 To evaluate the effectiveness of the liquid fragrance system according to the present invention, an evaporation test was carried out using different liquid fragrance compositions. In the first test, the liquid fragrance system consisted of the liquid fragrance composition according to the present invention. The different emulsions differed only in the essential oil. The evaporation test was carried out using a 90 g sample of each emulsion and an 8×24 cm plastic fiber reed stick. The test was carried out over a period of 50 - 60 days. For comparison, the test was repeated using a liquid fragrance composition based on dipropylene glycol methyl ether (Dowanol DPM).

[0069] Figures 1 and 2 show the experimental results obtained. Figure 1 shows the results of the evaporation test using the liquid fragrance composition according to the present invention. Figure 2 shows the results of the evaporation test using a liquid fragrance composition based on dipropylene glycol methyl ether. Figure 3 shows the results of the evaporation test using diffusers made of different materials (wood board and cardboard).

[0070] Complete evaporation of the liquid fragrance composition was confirmed. Further, the evaporation of the liquid fragrance system according to the present invention was slightly slower than the evaporation when using a dipropylene glycol methyl ether (Dowanol DPM)-based liquid fragrance composition under the same conditions with the same dosage, sample size, and length of the wick.

[0071] Importantly, when about 10% of the fragrance composition remains, the remaining 10% can "hide" in the wick, so the fragrance visually appears empty. The evaporation curve of the emulsion according to the present invention is flatter than the evaporation curve of the DPM variant. Nevertheless, the fragrance according to the present invention definitely empties more slowly than those containing DPM-based compositions.

Claims

1. (i)A container; (ii)A liquid fragrance composition; and (iii)A liquid fragrance system containing or consisting of a diffuser for diffusing the fragrance composition into the surrounding air (wherein the liquid fragrance composition is an oil-in-water emulsion, (a)An aqueous phase; (b)An oily phase containing at least one perfume or fragrance or essential oil; (c)At least one surfactant; (d)At least one stabilizer selected from the group consisting of polyacrylate or polymethacrylate thickeners, xanthan gum, gellan gum, guar gum, alginic acid, alginates, agar, carrageenan, welan gum, locust bean gum, tragacanth, gum arabic, pectin, polysaccharide, starch, dextrin, gelatin, casein, modified starch and modified cellulose and mixtures thereof; and optionally (e)Containing or consisting of at least one other additive and / or adjuvant; wherein the amount of the surfactant is 0.4 to 5% by weight based on the total weight of the oily phase, and the oil-in-water emulsion has an average oil droplet size of about 1 to about 15 μm.)

2. The liquid fragrance system according to claim 1, wherein the oil-in-water emulsion has an average oil droplet size of 1 μm or more and less than 15 μm.

3. The liquid fragrance system according to claim 1 or 2, wherein the proportion of at least one perfume or fragrance or essential oil in the oil-in-water emulsion is 0.1 to 75% by weight, particularly 3 to 8% by weight, based on the total weight of the oil-in-water emulsion.

4. The liquid fragrance system according to any one of claims 1 to 3, wherein at least one surfactant in the oil-in-water emulsion has an HLB value of 8 to 18, particularly 10 to 14.

5. The liquid fragrance system according to any one of claims 1 to 4, wherein at least one surfactant in the oil-in-water emulsion is selected from the group consisting of nonionic surfactants, anionic surfactants, amphoteric surfactants and mixtures thereof.

6. Based on the total weight of the oil-in-water emulsion, the oil-in-water emulsion ・ An aqueous phase of 25 to 99.9% by weight, particularly 89 to 96% by weight; ・ An oily phase of 0.1 to 75% by weight, particularly 3 to 8% by weight, contains at least one perfume or aroma substance or essential oil; - 0.004 to 18% by weight, in particular 0.3 to 1.3% by weight, of surfactant; - up to 1.5% by weight, in particular 0.6 to 1.1% by weight, of stabilizer; and optionally - contains or consists of up to 1% by weight, in particular 0.1 to 0.9% by weight, of additives and / or adjuvants, the liquid fragrance system according to any one of claims 1 to 5.

7. The liquid fragrance system according to any one of claims 1 to 6, wherein the diffuser is a natural or synthetic porous material that enables the diffusion of the fragrance composition.

8. The liquid fragrance system according to any one of claims 1 to 7, wherein the diffuser consists of one or more wicks, reeds, or natural or synthetic porous diffusers.

9. The liquid fragrance system according to any one of claims 1 to 8, wherein the diffuser is selected from the group consisting of wicks, reed diffusers, wood, or cardboard.

10. The liquid fragrance system according to claim 9, wherein the reed diffuser is made of a material selected from the group consisting of wicks, reed diffusers, wood, or cardboard.

11. The liquid fragrance system according to any one of claims 1 to 10, further comprising removable means for preventing the diffusion of the fragrance composition into the surrounding air.

12. In the liquid fragrance system, the liquid fragrance composition comprises (a) an aqueous phase; (b) an oily phase containing at least one perfume or fragrance or essential oil; (c) at least one surfactant; (d) at least one stabilizer selected from the group consisting of polyacrylate or polymethacrylate thickeners, xanthan gum, gellan gum, guar gum, alginic acid, alginates, agar, carrageenan, welan gum, locust bean gum, tragacanth, gum arabic, pectin, polysaccharides, starch, dextrin, gelatin, casein, modified starch and modified cellulose and mixtures thereof; and optionally (e) containing or consisting of at least one other additive and / or adjuvant, wherein the amount of surfactant is 0.4 to 5% by weight based on the total weight of the oily phase, and the oil-in-water emulsion has an average oil droplet size of about 1 to about 15 μm.), wherein the use of the oil-in-water emulsion as the liquid fragrance composition.

13. The use according to claim 12, wherein the liquid fragrance system is a core device or a reed diffuser.

14. (a) an aqueous phase; (b) an oily phase containing at least one perfume or fragrance or essential oil; (c) at least one surfactant; (d) at least one stabilizer selected from the group consisting of polyacrylate or polymethacrylate thickeners, xanthan gum, gellan gum, guar gum, alginic acid, alginates, agar, carrageenan, welan gum, locust bean gum, tragacanth, gum arabic, pectin, polysaccharide, starch, dextrin, gelatin, casein, modified starch and modified cellulose and mixtures thereof; and optionally (e) an oil-in-water emulsion containing or consisting of at least one other additive and / or adjuvant, wherein the amount of surfactant is 0.4 to 5% by weight based on the total weight of the oily phase, and the oil-in-water emulsion has an average oil droplet size of about 1 to about 15 μm.).

15. A method for aromatizing and / or refreshing the ambient air, comprising diffusing the liquid fragrance composition according to any one of claims 1 to 14 using the device according to claims 1 to 11.

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