Stick diffuser comprising PBAT / PLA sticks and a glycol ether solvent system

Abstract

The present invention relates to a stick diffuser comprising one or more sticks formed from a mixture of polybutylene adipate terephthalate (PBAT) and polylactic acid (PLA), immersed in a composition comprising: (a) a perfuming or deodorizing substance, and (b) a solvent system comprising at least one glycol ether chosen from linear or branched C1-C8 alkyl ethers and di- or trialkylene glycols in which the alkylene group is chosen from ethylene and propylene groups, as well as their acetates. It also relates to the use of this diffuser for perfuming or deodorizing the atmosphere or a substrate such as the body and / or a textile.

Description

Title of the invention: Stick diffuser comprising PBAT / PLA sticks and a glycol ether-based solvent system SUBJECT OF THE INVENTION

[0001] The present invention relates to a stick diffuser comprising one or more sticks formed from a mixture of polybutylene adipate terephthalate (PBAT) and polylactic acid (PLA), immersed in a composition comprising: (a) a perfuming or deodorizing substance, and (b) a solvent system comprising at least one di- or trialkylene glycol alkyl ether or its acetate. It also relates to the use of this diffuser for perfuming or deodorizing the atmosphere or a substrate such as the body and / or a textile. BACKGROUND OF THE INVENTION

[0002] Different types of diffusers are commercially available. The diffusion of a fragrance can in particular occur by natural or passive evaporation, for example through a wick or a stick in contact with a composition containing this substance. Stick diffusers are conventionally made up of rattan sticks immersed in a fragrance solution comprising ethanol as a solvent. The fragrance solution is absorbed into the sticks through which it passes by capillary action before the fragrance is released into the atmosphere by evaporation.

[0003] However, there is a growing desire to avoid the use of ethanol in these products. In addition to being a flammable solvent that can cause safety problems during the packaging, transportation and / or use of these products, ethanol is a volatile organic compound (VOC) whose use is restricted by certain legislation. Volatile solvents that can be used as substitutes for ethanol include glycol ethers, as well as their esters and mixtures thereof. In particular, alkyl ethers of di- or trialkylene glycols and their acetates are non-flammable solvents at room temperature, many of which have a low vapor pressure and are permitted by the most stringent legislation. They are therefore good substitutes for ethanol, alone or in mixtures with other solvents.

[0004] Nevertheless, it has been observed that these solvents, associated with rattan sticks, lead to a low perfuming efficiency caused by too slow evaporation of the perfuming solution, which is not satisfactory for the consumer wishing to quickly and effectively perfume the environment in which the composition is applied. It has already been suggested that the sticks be treated to increase their porosity by subjecting them to a chemical treatment using a boiling alkaline solution to remove the lignin and hemicellulose they contain, followed by mechanical treatment (hot pressing) to densify them (WO2021 / 110770). However, these treatments increase the cost of the diffusers.

[0005] There therefore remains a need to have diffusers that can meet regulatory requirements regarding emissions of volatile organic compounds, and in particular the standards of the California Committee on Atmospheric Resources (CARB for California Air Resources Board), without significantly impacting the cost of these diffusers or their performance.

[0006] After extensive research, the Applicant has developed a combination of solvent(s) and sticks to meet these needs. Summary of the invention

[0007] The invention relates to a stick diffuser comprising one or more sticks formed from a mixture of polybutylene adipate terephthalate (PBAT) and poly-lactic acid (PLA), immersed in a composition comprising: (a) a perfuming or deodorizing substance, and (b) a solvent system comprising at least one glycol ether chosen from linear or branched C1-C8 alkyl ethers and di- or trialkylene glycols whose alkylene group is chosen from ethylene and propylene groups, as well as their acetates.

[0008] It also relates to the use of this diffuser for perfuming or deodorizing the atmosphere or a substrate such as the body and / or a textile. DETAILED DESCRIPTION

[0009] The various constituents of the diffusers according to the invention will now be described in more detail. Perfume or deodorant substance

[0010] By "perfuming or deodorizing substance" is meant a volatile organic substance comprising one or more compounds of synthetic, semi-synthetic or natural origin, suitable for producing an odor and / or for neutralizing or masking an odor. By "volatile" is meant an organic substance which has a vapor pressure greater than atmospheric pressure at 20°C.

[0011] As used in this specification, the term "perfuming substance" means a single compound or a mixture of volatile and odoriferous compounds. These compounds are listed in particular in Merck Index, 8th Edition, Merck & Co., Inc. Rahway, NJ. They generally include compounds of synthetic or natural origin, generally terpenic or aromatic, chosen from hydrocarbons, alcohols and their esters, aldehydes, esters, acetals and ketones, as well as compounds macrocyclic C12-C16, heterocyclic compounds such as pyrazines and indoles, and mixtures thereof.

[0012] The following perfuming compounds may in particular be used as perfume in the present invention, alone or in combination: methyl 2-methyl butyrate; isopropyl 2-methyl butyrate; ethyl 2-methyl butyrate; ethyl 2-methyl pentanoate; ethyl heptanoate; ethyl octanoate; isobutyl hexanoate; amyl butyrate; amyl heptanoate; isoamyl isobutyrate; hexyl acetate; hexyl butyrate; hexyl isobutyrate; hexyl isovalerate; hexyl propionate; ethyl 2-cyclohexyl propanoate; ethyl 3,5,5-trimethyl hexanoate; glyceryl 5-hydroxydecanoate; prenyl acetate; methyl 2-butenyl acetate; methyl 3-nonenoate; ethyl decenoate; ethyl octenoate; ethyl decadienoate; ethyl octenoate; citronellyl acetate; 2-hex-1-enyl isovalerate; 2-hexen-1-yl propionate; 2-hexen-1-yl valerate; 3-hexen-1-yl (E)-2-hexenoate;3-hexen-1-yl 2-methyl butyrate; 3-hexen-1-yl acetate; 3-hexen-1-yl benzoate; 3-hexen-1-yl formate; 3-hexen-1-yl tiglate; 2-methyl butyl 2-methyl butyrate; butyl isovalerate; allyl cyclohexane; allyl cyclohexyl propionate; allyl cyclohexyl valerate; benzyl octanoate; gamma-decalactone; gamma-dodecalactone; jasmin lactone; jasmolactone; nonalactone; 6-acetoxydihydrotheaspirane; phenoxyethyl isobutyrate; pivacyclene; dimethyl anthranilate; methyl anthranilate; octanal; nonanal; decanal; dodecanal; methyl nonyl acetaldehyde; methyl octyl acetaldehyde; 2,4-hexadienal; intreleven; decen-l-al; nonen-l-al; aldoxal; geraldehyde; isocyclocitral; d-limonene; ligustral; tridecenal; triplai; vertoliff; cyclal C; heliotropine; neo-caspirene; beta naphthol ethyl ether;beta naphthol methyl ether; hyacinth ether; 2-heptyl cyclopentanone; undecavertol; frutonil; and mixtures thereof.

[0013] The perfuming substance used according to the invention may consist of a perfume ingredient, a combination of perfume ingredients referred to as an "accord" or a more complex mixture of perfume ingredients referred to as a "perfume". A perfume ingredient contains, for example, a plant extract comprising perfuming substances. The plant extract is generally the product resulting from the implementation of a process for extracting odorous molecules, such as enfleurage, hydrodistillation, steam distillation, expression or supercritical CO2 extraction, on all or part of a plant. These techniques make it possible in particular to obtain essential oils or absolutes, in particular.

[0014] For its part, the deodorizing substance used according to the invention may constitute an odor-masking agent. Here again, this agent may contain one or more compounds of natural or synthetic origin. Such agents may in particular be chosen from : optionally alkoxylated saturated aldehydes, such as 2-methylundecanal and 6-methoxy-2,6-dimethyloctanal; unsaturated aldehydes, such as 2,6-dimethylhept-5-enal, 2,4-dimethylcyclohex-3-enecarbaldehyde, 4-vinylcyclohex-1-enecarbaldehyde and bicyclo[2.2.2]oct-5-ene-2-carboxaldehyde; aromatic aldehydes, such as 4-methylbenzaldehyde; glycolates, such as allyl-2-(isopentyloxy)acetate; branched and / or unsaturated fatty alcohols, such as linalool, nona-2,6-dien-1-ol, non-6-en-1-ol, 2,6-dimethylheptan-2-ol and cis hex-3-en-1-ol; sulfur perfumes such as 2-(4-methylcyclohex-3-en-1-yl)propane-2-thiol and 4,7,7-trimethyl-6-thiabicyclo([3.2.1]octane; benzodioxepins, such as 7-methyl-2H-benzo[b][l,4]dioxepin-3-4H)-one; ketones, such as 3-methyl-2-pentylcyclopent-2-enone and 2-methyl-5-(prop-l-en2-yl)cyclohex-2-enone; furans, such as 5-tert-butyl-2-methyl-5-propyl-2H-furan; pyrans, such as 4-methylene-2-phenyltetrahydro-2H-pyran; phenols, such as eugenol (4-allyl-2-methoxyphenol); phenolic esters, such as p-tolyl acetate; nitriles, such as 4-isopropyl benzonitrile; aromatic ethers, such as l-methoxy-4-propylbenzene; esters, such as ethyl isobutyrate, hexenyl acetate, and ethyl isovalerate; lactones, such as 5-pentyldihydrofuran-2(3H)-one; anthranilates, such as methyl 2-aminobenzoate; carboxylic acids, such as 2-phenylacetic acid; terpenes, such as 7-methyl-3-methyleneocta-l,6-diene; and mixtures thereof.

[0015] Another example of an odor masking agent consists of a combination of 1,8-para-menthenethiol and 3-mercaptohexyl acetate or an essential oil of Timur (Zanthoxylum armatum) containing this combination, which can be obtained from any part of Timur and in particular from its leaves, its trunk, its fruits (berries) or their pericarp, more preferably from its berries.

[0016] Alternatively, the deodorizing substance may be an odor neutralizing agent, which may in particular be chosen from undecylenic acid and one of its derivatives. The undecylenic acid derivatives may advantageously be chosen from: an undecylenic acid alkyl ester, in particular a linear or branched, substituted or unsubstituted, C1-C12 alkyl ester such as a methyl, ethyl, propyl, hexyl or decyl ester; a polyoxyalkylene acid ester, in particular a polyoxyethylene, polyoxypropylene or poly(oxyethylene)(oxypropylene) ester of undecylenic acid, preferably containing from 2 to 20 polyoxyalkylene units; a salt of undecylenic acid, in particular a metal salt, such as the sodium, potassium, magnesium, calcium, zinc or copper salts or alternatively an ammonium salt of undecylenic acid; and mixtures thereof. It is preferred according to the invention that undecylenic acid or one of its derivatives is an alkyl ester of undecylenic acid, in particular methyl undecylenate.

[0017] In a preferred embodiment, the composition according to the invention comprises from 0.5 to 30% by weight, preferably from 3 to 25% by weight, more preferably from 5 to 20% by weight of said perfuming or deodorizing substance. Solvent system

[0018] The composition according to the invention comprises, in addition to the perfuming or deodorizing substance described above, a solvent system comprising at least one glycol ether chosen from linear or branched C1-C8 alkyl ethers and di- or trialkylene glycols in which the alkylene group is chosen from ethylene and propylene groups, as well as their acetates.

[0019] These compounds are generally referred to below as "glycol ethers according to the invention", unless otherwise indicated. They may in particular be chosen from: linear or branched C2-C8 alkyl ethers and dialkylene glycols; linear or branched C1-C8 alkyl ethers and trialkylene glycols; their acetates; and mixtures thereof.

[0020] More particularly, the di- or trialkylene glycol alkyl ether may be chosen from:

[0021] - diethylene glycol monoethyl ether (Carbitol),

[0022] - diethylene glycol propyl ether,

[0023] - diethylene glycol monobutyl ether,

[0024] - diethylene glycol monohexyl ether,

[0025] - diethylene glycol mono(2-ethylhexyl)ether,

[0026] - dipropylene glycol n-propyl ether (DPnP),

[0027] - dipropylene glycol n-butyl ether,

[0028] - triethylene glycol monomethyl ether,

[0029] - triethylene glycol monoethyl ether,

[0030] - triethylene glycol monobutyl ether,

[0031] - triethylene glycol mono(2-ethylhexyl) ether,

[0032] - tripropylene glycol methyl ether,

[0033] - tripropylene glycol n-propyl ether,

[0034] - tripropylene glycol n-butyl ether,

[0035] and mixtures thereof.

[0036] For its part, the di- or trialkylene glycol alkyl ether acetate can be chosen from:

[0037] - diethylene glycol monoethyl ether acetate,

[0038] - diethylene glycol n-butyl ether acetate,

[0039] - dipropylene glycol mether ether acetate (DPMA),

[0040] and mixtures thereof.

[0041] It is understood that the composition according to the invention may comprise one or several alkyl ethers of di- or trialkylene glycol, one or more alkyl ether acetates of di- or trialkylene glycol, as well as mixtures thereof.

[0042] The glycol ethers according to the invention represent in total from 60 to 100% by weight, preferably from 85 to 100% by weight, of the solvent system.

[0043] Preferably, dipropylene glycol n-propyl ether (DPnP), diethylene glycol monoethyl ether, dipropylene glycol mether ether acetate (DPMA), or mixtures thereof with each other and / or with at least one other glycol ether according to the invention are used.

[0044] In addition to the glycol ethers according to the invention, the solvent system may further comprise one or more other solvents, such as those conventionally used in perfuming or deodorizing compositions and which may in particular be used as dilution solvents, in particular for conveying the perfuming or deodorizing substance, and / or as diffusion solvent, for adjusting the diffusion profile of this substance.

[0045] Examples of such solvents include:

[0046] - isopropylidene glycerol,

[0047] - alkyl monoesters, such as isoamyl laurate, ethylhexyl laurate, isopropyl myristate, methyl stearate, butyl stearate, isobutyl stearate, methyl palmitate, ethyl palmitate, ethylhexyl palmitate,

[0048] - alkyl di- and triesters, such as diethyl succinate, di- succinate ethylhexyl, diisobutyl adipate, dioctyl adipate, diisopropyl sebacate, dibutyl sebacate, dioctyl sebacate, and triethyl citrate,

[0049] - dimethyl isosorbide,

[0050] - 3-methoxy-3-methyl-l-butanol (MMB),

[0051] - fatty alkyl carbonates, such as dicaprylyl carbonate,

[0052] - isoparaffins, and

[0053] - their mixtures. Additives

[0054] In a particular embodiment of the invention, the perfuming or deodorizing substance and the solvent system represent at least 50%, more preferably at least 70%, better still at least 90%, even better still at least 95% of the weight of the composition. More particularly, the composition consists only of the solvent system and the perfuming or deodorizing substance. Alternatively, the composition may further comprise one or more additives chosen from antioxidants, antifungals, preservatives, colorants, pigments, light stabilizers, viscosity agents such as gelling agents and / or thickeners, surfactants and mixtures thereof, without this list being limiting, provided that these constituents do not harm the properties of the composition according to the invention.

[0055] In a preferred embodiment, the composition according to the invention is anhydrous, that is to say that it contains less than 5% by weight of water, preferably less than 3% by weight of water, or even less than 1% by weight of water, relative to the total weight of the composition. Diffuser

[0056] The composition described above is conveyed in a stick diffuser, which comprises, in addition to this composition, at least one stick, generally from 1 to 15 sticks, in particular four, five, six, seven, eight, ten sticks, twelve or fifteen sticks, partially immersed in the composition, the assembly being arranged in a container which may in particular be made of glass, plastic, or ceramic, and have any shape suitable for this use.

[0057] The sticks used according to the invention are formed from a mixture of polybutylene adipate terephthalate (PBAT) and polylactic acid (PLA).

[0058] In the context of this description, the term "polylactic acid" means both PLA itself and copolymers of PLA, in particular with diols and / or diacids. These copolymers thus comprise alkylene units in the PLA chain. The expression "polylactic acid" also includes polylactic acid grafted, in particular, with maleic anhydride.

[0059] These sticks can be prepared in a conventional manner, by mixing the two polymers, optionally in the presence of at least one compatibilizer and / or at least one plasticizer. Examples of compatibilizers are epoxy-functional compounds, such as glycidyl methacrylate or its copolymers with ethylene (EGMA), as well as polyisocyanates, such as toluene diisocyanate.

[0060] In addition, the mixture of PB AT and PLA may optionally comprise at least one other polymer, chosen from: hydroxyalkanoates, such as polyhydroxy-butyrate-co-valerate (PHBV); polybutylene succinate (PB S); polycaprolactone (PCL); and mixtures thereof.

[0061] A mixture of PB AT and PLA is notably commercially available from the company BASF under the name Ecosio®.

[0062] Alternatively or additionally, it is possible to add to the mixture of PB AT and PLA one or more usual additives and in particular at least one pigment and / or colorant, adapted in particular to give a black color to the sticks. It has been observed that the sticks thus colored did not show any leakage of pigment or colorant into the perfuming or deodorizing composition. This constitutes an advantage of the present invention because it is thus possible to maintain the transparency of the composition, which is important in the case where it is packaged in a container which is itself transparent.

[0063] The mixture of PB AT and PLA can be hot extruded in the form of fibers which contain the two polymers, optionally in the form of inclusions of one of the polymers (for example PB AT) in a matrix formed from the other polymer (for example PLA). These fibers are then hot-assembled to form the rods according to the invention. The latter thus comprise, for example, 50 to 100 fibers, preferably 60 to 90 fibers. They advantageously have a diameter ranging, for example, from 1 to 10 mm, preferably from 2 to 6 mm and / or a length of 10 to 50 cm, preferably from 20 to 35 cm.

[0064] The diffuser according to the invention can be used to deodorize or perfume the atmosphere or a substrate such as a textile and / or the body.

[0065] The invention will be better understood in light of the following examples, which are given purely for illustrative purposes and are not intended to limit the scope of the invention, defined by the appended claims. FIGURES

[0066] [Fig. 1] represents the evaporation curve as a function of time of a composition based on DPnP associated with two types of sticks, respectively rattan and PBAT / PLA based.

[0067] [Fig.2] represents the evaporation curve as a function of time of a composition based on a mixture of solvents according to the invention, associated with two types of sticks, respectively made of rattan and based on PBAT / PLA.

[0068] [Fig.3] represents the evaporation curve as a function of time of a composition based on ethanol or carbitol, associated with rattan sticks.

[0069] [Fig.4] illustrates the color of the fragrance solution of a diffuser according to the invention, comprising PBAT / PLA sticks (right) and of a comparative diffuser (left) comprising rattan sticks, after 40 days. EXAMPLES

[0070] Example 1 (comparative): Diffusers comprising rattan sticks

[0071] 170g of a solution consisting of 15% by weight of a perfume and 85% by weight of ethanol (solution SI) or Carbitol (solution S2) were prepared. Each of these solutions was introduced into a transparent container, in which 8 rattan sticks having a diameter of 4 mm and a length of 25 cm were placed, to obtain a diffuser.

[0072] These two diffusers were placed in the same place, at room temperature (20°C±2°C), and the weight loss of the solution was measured at different time intervals, over 60 days.

[0073] The results of this test are presented in the attached [Fig.3].

[0074] As this Figure shows, in the case where rattan sticks are used, the evaporation rate of a perfume solubilized in a solvent according to the invention is much lower than that obtained in the presence of ethanol, since it is on average 3.2 g per day with ethanol and only 1.2 g per day with the solvent according to the invention.

[0075] Consequently, the olfactory perception of the perfume is weaker when it is conveyed in carbitol rather than in ethanol, in the presence of rattan sticks.

[0076] Example 2: Evaporation tests in the presence of DPnP

[0077] A solution consisting of 85% by weight of DPnP and 15% by weight of a perfume was prepared. 170g of this solution was introduced into a transparent container, in which 8 black-tinted PBAT / PLA sticks, having a diameter of 4 mm and a length of 25 cm, were placed to obtain a diffuser according to the invention. A comparative diffuser was prepared using the same solution, but substituting 8 rattan sticks having the same dimensions for the PBAT / PLA sticks.

[0078] These two diffusers were placed in the same place, at room temperature (20°C±2°C), and the weight loss of the solution was measured at different time intervals, over 40 days.

[0079] The results of this test are presented in the attached [Fig. 1].

[0080] As shown in this Figure, the sticks according to the invention significantly increase the speed of evaporation of a perfume compared to rattan sticks, since:

[0081] - the slope of the evaporation curve is 25% higher, and

[0082] - the loss of solution is approximately 50g instead of 38g after 38 days.

[0083] This increase in the speed of evaporation results in an increase in the olfactory perception of the perfume.

[0084] Furthermore, it can be seen in [Fig.4] that the fragrance solution of the comparative diffuser (on the left) has become tinted black over time, unlike the solution of the diffuser according to the invention (on the right). The dyes are in fact fixed more stably in the PBAT / PLA sticks than on the rattan sticks.

[0085] Example 3: Evaporation tests in the presence of a mixture of solvents

[0086] A solution was prepared consisting of 15% by weight of a perfume and 85% by weight of weight of a mixture of solvents comprising: 60% by weight of DPMA, 32% by weight of DPnP, 6% by weight of MMB and 2% by weight of isoparaffin (Isopar M). 170g of this solution was introduced into a transparent container, in which 8 black-tinted PBAT / PLA sticks, having a diameter of 4 mm and a length of 25 cm, were placed to obtain a diffuser according to the invention. A comparative diffuser was prepared using the same solution, but substituting 8 rattan sticks having the same dimensions for the PBAT / PLA sticks.

[0087] These two diffusers were placed in the same place, at room temperature (20°C±2°C), and the weight loss of the solution was measured at different time intervals, over 45 days.

[0088] The results of this test are presented in the attached [Fig.2].

[0089] As shown in this Figure, the rods according to the invention significantly increase-

[0090]

[0091]

[0092] tively the evaporation speed of a perfume compared to rattan sticks, since: - the slope of the evaporation curve is 50% higher, and - the loss of solution is approximately 87g instead of 56g after 41 days. This increase in the evaporation speed results in an increase in the olfactory perception of the perfume.

Claims

Claims

1. Stick diffuser comprising one or more sticks formed from a mixture of polybutylene adipate terephthalate (PBAT) and poly-lactic acid (PLA), immersed in a composition comprising: (a) a perfuming or deodorizing substance, and (b) a solvent system comprising at least one glycol ether chosen from linear or branched C1-C8 alkyl ethers and di- or trialkylene glycols whose alkylene group is chosen from ethylene and propylene groups, as well as their acetates.

2. Diffuser according to claim 1, characterized in that the glycol ether is chosen from: linear or branched C2-C8 alkyl ethers and dialkylene glycols; linear or branched C1-C8 alkyl ethers and trialkylene glycols; their acetates; and their mixtures.

3. Diffuser according to claim 1 or 2, characterized in that the di- or trialkylene glycol alkyl ether is chosen from: - diethylene glycol monoethyl ether (Carbitol), - diethylene glycol propyl ether, - diethylene glycol monobutyl ether, - diethylene glycol monohexyl ether, - diethylene glycol mono(2-ethylhexyl) ether, - dipropylene glycol n-propyl ether (DPnP), - dipropylene glycol n-butyl ether, - triethylene glycol monomethyl ether, - triethylene glycol monoethyl ether, - triethylene glycol monobutyl ether, - triethylene glycol mono(2-ethylhexyl) ether, - tripropylene glycol methyl ether, - tripropylene glycol n-propyl ether, - tripropylene glycol n-butyl ether, and mixtures thereof.

4. Diffuser according to any one of claims 1 to 3, characterized in that the di- or trialkylene glycol alkyl ether acetate is chosen from: - diethylene glycol monoethyl ether acetate, - diethylene glycol n-butyl ether acetate, - dipropylene glycol mether ether acetate (DPMA), and mixtures thereof.

5. Diffuser according to any one of claims 1 to 4, characterized in that the glycol ether consists of dipropylene glycol n-propyl ether (DPnP), diethylene glycol monoethyl ether, dipropylene glycol mether ether acetate (DPMA), or mixtures thereof with each other and / or with at least one other glycol ether according to claim 1.

6. Diffuser according to any one of claims 1 to 5, characterized in that the solvent system further contains at least one solvent chosen from: - isopropylidene glycerol, - alkyl monoesters, such as isoamyl laurate, ethylhexyl laurate, isopropyl myristate, methyl stearate, butyl stearate, isobutyl stearate, methyl palmitate, ethyl palmitate, ethylhexyl palmitate, - alkyl di- and triesters, such as diethyl succinate, diethylhexyl succinate, diisobutyl adipate, dioctyl adipate, diisopropyl sebacate, dibutyl sebacate, dioctyl, and triethyl citrate, - dimethyl isosorbide, - 3-methoxy-3-methyl-l-butanol (MMB), - fatty alkyl carbonates, such as dicaprylyl carbonate, - isoparaffins, and - mixtures thereof.

7. Diffuser according to any one of claims 1 to 6, characterized in that the glycol ethers represent in total from 60 to 100% by weight, preferably from 85 to 100% by weight, of the solvent system.

8. Diffuser according to any one of claims 1 to 7, characterized in that the composition comprises from 0.5 to 30% by weight, preferably from 3 to 25% by weight, more preferably from 5 to 20% by weight of the substance (a).

9. Diffuser according to any one of claims 1 to 8, characterized in that the substance (a) and the solvent system represent at least 50%, more preferably at least 70%, better still at least 90%, even better still at least 95% of the weight of the composition.

10. Use of a diffuser according to any one of claims 1 to 9 for perfuming or deodorizing the atmosphere or a substrate such as the body and / or a textile.

Images