Dry cleaning solvent composition

Abstract

The present disclosure relates to the technical field of detergents. Provided is a dry cleaning solvent composition. The dry cleaning solvent composition comprises a saturated cyclosiloxane, a polyol, water and an organophosphorus liquid flame retardant. In the present disclosure, by means of the synergetic combination of the saturated cyclosiloxane, the polyol, water and the organophosphorus liquid flame retardant, the obtained dry cleaning solvent composition has a good removal effect on water-soluble stains, oil-soluble stains and pigment stains, and also has good fire resistance and relatively high safety.

Description

A dry cleaning solvent composition

[0001] This disclosure claims priority to two Chinese patent applications filed on February 21, 2025, entitled "A Dry Cleaning Solvent Composition" and June 11, 2025, entitled "A Dry Cleaning Solvent Composition", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of detergent technology, and more particularly to a dry cleaning solvent composition. Background Technology

[0003] Garments made of delicate fabrics such as wool and silk can suffer significant damage to their shape and color during regular washing. Therefore, these garments are generally dry-cleaned to remove stains while preserving their shape and color.

[0004] Currently, commercial dry cleaning technologies mostly use organic solvents as the primary dry cleaning medium, such as tetrachloroethylene, petroleum solvents, and alcohol ether solvents. Tetrachloroethylene has high solubility (KB value approximately 90) and a wide solubility range, but its volatile gases are toxic, posing significant safety hazards to operators and clothing during use. Petroleum solvents have a low flash point (approximately 57°C), are highly flammable, and an explosion risk arises when their volatile gases reach 20% in the air. Alcohol ether solvents have strong degreasing capabilities (KB value approximately 100) and an irritating odor, posing a certain degree of harm to clothing and operators. Furthermore, current dry cleaning and washing technologies are not effective at removing pigment stains (such as red wine). To ensure thorough removal of pigment stains, garments undergo pre-dry cleaning treatment, a process performed manually outside the machine. This typically involves using a bristle brush dipped in soap or alcohol soap to apply to the stains. Even after dry cleaning, garments may still have residual stains, requiring post-dry cleaning treatment to achieve a satisfactory cleaning rate.

[0005] The flammability, toxicity, excessive degreasing capacity, inability to remove pigment stains inside the machine, and complex operating procedures of the dry cleaning solvents currently used in commercial dry cleaning technology have hindered the promotion and use of dry cleaning technology by home users. Summary of the Invention

[0006] To address the aforementioned technical problems, this disclosure provides a dry cleaning solvent composition. This dry cleaning solvent composition is non-volatile, has low toxicity, possesses flame-retardant properties, and exhibits excellent removal effects on water-soluble stains, oil-soluble stains, and pigment stains.

[0007] In a first aspect, this disclosure provides a dry cleaning solvent composition comprising: a saturated cyclosiloxane, a polyol, water, and an organophosphorus liquid flame retardant.

[0008] In some embodiments of this disclosure, the volume content of each component in the dry cleaning solvent composition is as follows: 3.5-10.5% saturated cyclosiloxane, 30-40% polyol, 20-25% water, and 35-40% organophosphorus liquid flame retardant.

[0009] In some embodiments of this disclosure, the number of silicon atoms in the saturated cyclosiloxane is 4-7.

[0010] In some embodiments of this disclosure, the saturated cyclosiloxane is a saturated alkylcyclosiloxane.

[0011] In some embodiments of this disclosure, the repeating unit in the saturated alkylcyclosiloxane is Where R1 and R2 are each independently methyl or ethyl. Represents a connection key.

[0012] In some embodiments of this disclosure, the saturated alkylcyclosiloxane is selected from one or more of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecylcyclohexasiloxane.

[0013] In some embodiments of this disclosure, the polyol has 2-6 carbon atoms.

[0014] In some embodiments of this disclosure, the polyol is a diol and / or a triol.

[0015] In some embodiments of this disclosure, the polyol is selected from one or more of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, and dipropylene glycol.

[0016] As a preferred embodiment of this disclosure, the polyol is selected from one or more of 1,2-propanediol, 1,3-propanediol, and dipropylene glycol.

[0017] In some embodiments of this disclosure, the organophosphorus liquid flame retardant includes one or more of tetrahydroxymethylphosphoric acid, triethyl phosphate, tri(xylene) phosphate and dimethyl methylphosphonate, preferably triethyl phosphate.

[0018] In some embodiments of this disclosure, the dry cleaning solvent composition further includes a surfactant.

[0019] In some embodiments of this disclosure, the surfactant is present in a volume content of 0.1-0.3% in the dry cleaning solvent composition.

[0020] In some embodiments of this disclosure, the surfactant includes one or more of cationic surfactants, anionic surfactants, and nonionic surfactants, preferably nonionic surfactants.

[0021] In some embodiments of this disclosure, the nonionic surfactant includes one or more of fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers, polyethylene glycol fatty acid esters, and polyoxyethylene alkylamines.

[0022] The technical solutions provided in this disclosure have the following advantages.

[0023] In the dry cleaning solvent composition provided in this disclosure, saturated cyclosiloxanes can dissolve and remove oil-soluble stains; polyols can dissolve and remove pigment stains; water can wet, penetrate, and disperse water-soluble stains; and organophosphorus liquid flame retardants can, on the one hand, improve the flame retardancy of the dry cleaning solvent composition, reduce the risk of fire and explosion, and improve the safety of the dry cleaning solvent composition, and on the other hand, synergistically work with saturated cyclosiloxanes to improve the removal effect of the dry cleaning solvent composition on oil-soluble stains. Through the synergistic effect of saturated cyclosiloxanes, polyols, water, and organophosphorus liquid flame retardants, the obtained dry cleaning solvent composition has good removal effects on water-soluble stains, oil-soluble stains, and pigment stains, and also has good flame retardancy. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 shows a photograph of a knitted wool cardigan with different stains before it was cleaned with the dry cleaning solvent composition provided in Example 1.

[0027] Figure 2 shows a photograph of a knitted wool cardigan with different stains after being cleaned with the dry cleaning solvent composition provided in Example 1. Embodiments of the present invention

[0028] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0029] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] In a first aspect, embodiments of this disclosure provide a dry cleaning solvent composition comprising: a saturated cyclosiloxane, a polyol, water, and an organophosphorus liquid flame retardant.

[0033] It should be noted that the term "liquid" in this disclosure refers to a liquid state at room temperature.

[0034] In the dry cleaning solvent composition provided in this disclosure, saturated cyclosiloxanes can dissolve and remove oil-soluble stains; polyols can dissolve and remove pigment stains; water can wet, penetrate, and disperse water-soluble stains; and organophosphorus liquid flame retardants can, on the one hand, improve the flame retardancy of the dry cleaning solvent composition, reduce the risk of fire and explosion, and improve the safety of the dry cleaning solvent composition. On the other hand, they can synergistically work with saturated cyclosiloxanes to improve the removal effect of the dry cleaning solvent composition on oil-soluble stains.

[0035] The embodiments disclosed herein utilize the synergistic combination of saturated cyclosiloxanes, polyols, water, and organophosphorus liquid flame retardants to achieve a dry cleaning solvent composition that exhibits excellent removal effects on water-soluble stains, oil-soluble stains, and pigment stains, while also possessing good flame retardancy.

[0036] In some embodiments of this disclosure, the volume content of each component in the dry cleaning solvent composition is as follows.

[0037] The saturated cyclosiloxane is 3.5-10.5%, for example, it can be 3.5%, 3.6%, 3.8%, 4%, 4.2%, 4.3%, 4.5%, 4.6%, 4.8%, 5%, 5.2%, 5.3%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10% or 10.5%, etc.

[0038] The polyol content is 30-40%, for example, it can be 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39% or 40%, etc.

[0039] The water content is 20-25%, for example, it can be 20%, 20.5%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5%, 24%, 24.5%, or 25%, etc.

[0040] Organophosphorus liquid flame retardants are 35-40%, for example, they can be 35%, 35.5%, 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5% or 40%, etc.

[0041] In this embodiment, the contents of saturated cyclosiloxane, polyol, water, and organophosphorus liquid flame retardant are maintained within the aforementioned ranges, which helps to fully utilize the effects of each component and further enhance the overall cleaning effect of the dry cleaning solvent composition. Specifically, if the content of saturated cyclosiloxane is too low, the dry cleaning solvent composition will have a low ability to remove oil-soluble stains. If the content of saturated cyclosiloxane is too high, further increasing its content will not significantly improve the ability of the dry cleaning solvent composition to remove oil-soluble stains; instead, it will reduce the content of polyol and water, affecting the removal effect of the dry cleaning solvent composition on water-soluble and pigment-based stains. Similarly, if the content of polyol is too low, the dry cleaning solvent composition will have a low ability to remove pigment-based stains. If the content of polyol is too high, further increasing its content will not significantly improve the ability of the dry cleaning solvent composition to remove pigment-based stains; instead, it will affect the removal effect of the dry cleaning solvent composition on water-soluble and oil-soluble stains. If the content of water is too low, the dry cleaning solvent composition will have a low ability to remove water-soluble stains. If the water content is too high, further increasing it will not significantly improve the dry cleaning solvent composition's ability to remove water-soluble stains; instead, it will negatively impact its effectiveness in removing oil-soluble and pigment-based stains. If the content of organophosphorus liquid flame retardant is too low, it will reduce the flame retardancy of the dry cleaning solvent composition and its ability to remove oil-soluble stains. If the content of liquid flame retardant is too high, it will negatively affect the dry cleaning solvent composition's effectiveness in removing water-soluble and pigment-based stains.

[0042] In some embodiments of this disclosure, the number of silicon atoms in the saturated cyclosiloxane is 4-7; for example, it can be 4, 5, 6 or 7.

[0043] In some embodiments of this disclosure, the saturated cyclosiloxane is a saturated alkylcyclosiloxane.

[0044] In some embodiments of this disclosure, the repeating unit in the saturated alkylcyclosiloxane is Where R1 and R2 are each independently methyl or ethyl. Represents a connection key.

[0045] In some embodiments of this disclosure, the saturated alkylcyclosiloxane is selected from one or more of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecylcyclohexasiloxane. These saturated cyclosiloxanes have good structural stability and excellent removal ability for oil-soluble stains.

[0046] In some embodiments of this disclosure, the polyol has 2-6 carbon atoms, for example, 2, 3, 4, 5 or 6.

[0047] In some embodiments of this disclosure, the polyol is a diol and / or a triol, preferably a diol.

[0048] In some embodiments of this disclosure, the polyol is selected from one or more diols having 2-6 carbon atoms.

[0049] In this embodiment of the disclosure, if the polyol has too many carbon atoms or too many hydroxyl groups, its viscosity is high, its permeability is poor, its washing ability is poor, its boiling point is high, it is not easy to dry, and it leaves more residue on the fabric.

[0050] In some embodiments of this disclosure, the polyol is selected from one or more of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, and dipropylene glycol, preferably from one or more of 1,2-propanediol, 1,3-propanediol, and dipropylene glycol. These diols have moderate viscosity, good penetration, and are more effective at removing pigment stains.

[0051] In some embodiments of this disclosure, the organophosphorus liquid flame retardant includes one or more of tetramethylolphosphine chloride, triethyl phosphate, tri(xylene) phosphate, and dimethyl methylphosphonate. These organophosphorus liquid flame retardants all exhibit good flame retardant and fire-retardant properties, and show good performance in terms of odor, environmental friendliness, and biocompatibility. Among them, triethyl phosphate is a commonly used liquid flame retardant, mainly used in the textile industry, and is well-suited for use in washing clothes. Furthermore, triethyl phosphate has the lowest viscosity and density among the aforementioned flame retardants, which is beneficial for removing oil-soluble stains; therefore, triethyl phosphate is the most preferred organophosphorus liquid flame retardant.

[0052] In some embodiments of this disclosure, the dry cleaning solvent composition further includes a surfactant.

[0053] In this embodiment, surfactants help improve the softness of clothing, but they do not significantly improve the cleaning ability of the dry cleaning solvent composition, and may even reduce it. Those skilled in the art can choose to add or not add surfactants as needed.

[0054] In some embodiments of this disclosure, the surfactant in the dry cleaning solvent composition has a volume content of 0.1-0.3%; for example, it may be 0.1%, 0.12%, 0.15%, 0.18%, 0.2%, 0.22%, 0.25%, 0.28%, or 0.3%, etc.

[0055] In some embodiments of this disclosure, the surfactant includes one or more of cationic surfactants, anionic surfactants, and nonionic surfactants, preferably nonionic surfactants.

[0056] In some embodiments of this disclosure, the nonionic surfactant includes one or more of fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers, polyethylene glycol fatty acid esters, and polyoxyethylene alkylamines.

[0057] To make the technical problems, technical solutions, and beneficial effects solved by this disclosure clearer, the disclosure will be further described in detail below with reference to embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its applications. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0058] Where specific techniques or conditions are not specified in the examples, they shall be performed in accordance with conventional techniques or conditions in the art, techniques or conditions described in the literature, or product instructions. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0059] Example 1

[0060] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 4.55% decamethylcyclopentasiloxane, 36.36% 1,2-propanediol, 22.73% water, and 36.36% triethyl phosphate.

[0061] Example 2

[0062] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 3.5% decamethylcyclopentasiloxane, 38.5% dipropylene glycol, 20% water, and 38% triethyl phosphate.

[0063] Example 3

[0064] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 5.5% octamethylcyclotetrasiloxane, 35% 1,3-propanediol, 24.5% water, and 35% triethyl phosphate.

[0065] Example 4

[0066] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 5% dodecylcyclohexasiloxane, 30% 1,4-butanediol, 25% water, and 40% triethyl phosphate.

[0067] Example 5

[0068] This embodiment provides a dry cleaning solvent composition, which differs from Example 1 only in that triethyl phosphate is replaced with tetrahydroxymethylphosphoric acid.

[0069] Example 6

[0070] This embodiment provides a dry cleaning solvent composition, which differs from Example 1 only in that triethyl phosphate is replaced with tri(xylene) phosphate.

[0071] Example 7

[0072] This embodiment provides a dry cleaning solvent composition, which differs from Example 1 only in that triethyl phosphate is replaced with dimethyl methylphosphonate.

[0073] Example 8

[0074] This embodiment provides a dry cleaning solvent composition, which differs from Example 1 only in that 1,2-propanediol is replaced with 1,2-octanediol.

[0075] Example 9

[0076] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 2% decamethylcyclopentasiloxane, 45% 1,2-propanediol, 15% water, and 38% triethyl phosphate.

[0077] Example 10

[0078] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 20% decamethylcyclopentasiloxane, 25% 1,2-propanediol, 30% water, and 25% triethyl phosphate.

[0079] Example 11

[0080] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 4.5% decamethylcyclopentasiloxane, 23% 1,2-propanediol, 22.5% water, and 50% triethyl phosphate.

[0081] Example 12

[0082] This embodiment provides a dry cleaning solvent composition comprising the following components by volume percentage: 10.5% decamethylcyclopentasiloxane, 30% 1,2-propanediol, 24.5% water, and 35% triethyl phosphate.

[0083] Comparative Example 1

[0084] This comparative example provides a dry cleaning solvent composition comprising the following components by volume percentage: 40.91% decamethylcyclopentasiloxane, 36.36% 1,2-propanediol, and 22.73% water.

[0085] Comparative Example 2

[0086] This comparative example provides a dry cleaning solvent composition comprising the following components by volume percentage: 36.36% 1,2-propanediol, 22.73% water, and 40.91% triethyl phosphate.

[0087] Comparative Example 3

[0088] This comparative example provides a dry cleaning solvent composition, which differs from Example 1 only in that triethyl phosphate is replaced with chloroalkane 52 (C15H26Cl6).

[0089] Performance testing

[0090] Washing efficiency: Chili oil (oil-soluble stain), red wine (pigment stain), and soy sauce (water-soluble stain) were selected as representative stains. The dry cleaning solvent compositions provided in the above examples and comparative examples were used to dry clean wool fabrics stained with these stains. The standard fabric sample size was 6 cm × 6 cm. 30 microliters of stain were accurately added to the standard fabric sample using a 200 microliter pipette, and the sample was allowed to stand for 12 hours to allow the stain to dry completely. The washing conditions were a vertical stain remover at 30°C and a speed of 120 rpm for 20 minutes. The stain removal effect is expressed as washing efficiency, calculated as: washing efficiency = (difference in reflectance of the soiled fabric before and after cleaning) / (difference in reflectance of the original fabric before and after soiling) × 100%.

[0091] Flame retardant performance: Take 1 mL of the well-mixed dry cleaning solvent with a spatula and place it in the outer flame of an alcohol lamp for continuous heating. If the dry cleaning solvent in the spatula can achieve flame retardancy within 15 seconds and self-extinguish within 30 seconds after burning, it is qualified.

[0092] The results of the above tests are shown in Table 1.

[0093] Table 1

[0094]

[0095] Figures 1 and 2 show the actual images of the knitted wool cardigans with different stains before and after cleaning with the dry cleaning solvent composition provided in Example 1.

[0096] As can be seen from the experimental data in Figures 1 and 2 and Table 1, the dry cleaning solvent composition provided in this embodiment has good removal effect on water-soluble stains, oil-soluble stains and pigment stains, and its flame retardant performance is qualified.

[0097] Compared to Example 1, the diol used in Example 8 has a higher number of carbon atoms. Due to its higher viscosity, poorer penetration, and weaker cleaning ability, the dry cleaning solvent composition provided in Example 8 exhibits reduced effectiveness in removing pigment stains.

[0098] Compared to Example 1, Example 9 has lower contents of cyclosiloxane and water, and higher contents of diol, resulting in a weakened removal effect of the dry cleaning solvent composition on both oil-soluble and water-soluble stains. Furthermore, water and diol can form a eutectic system; due to the low water content, the solubility of propylene glycol is limited, thus restricting its ability to remove pigment stains. Therefore, the dry cleaning solvent composition provided in Example 9 also has a weakened removal effect on pigment stains.

[0099] Compared with Example 1, Example 10 has a higher content of cyclosiloxane and water, and a lower content of diol and organophosphorus liquid flame retardant, which reduces the removal effect of the dry cleaning solvent composition on pigment stains and fails to meet the flame retardant performance requirements.

[0100] Compared with Example 1, the content of diol in Example 11 is lower and the content of organophosphorus liquid flame retardant is higher, resulting in a decrease in the removal effect of the dry cleaning solvent composition on pigment stains.

[0101] Compared to Example 1, Comparative Example 1 used cyclosiloxane instead of organophosphorus liquid flame retardant, and the resulting dry cleaning solvent composition failed to meet the flame retardant performance requirements. However, since cyclosiloxane plays a major role in removing oil-soluble stains in the dry cleaning solvent composition, the dry cleaning solvent composition provided in Comparative Example 1 still maintains a high oil-soluble stain removal effect.

[0102] Comparative Example 2 used an organophosphorus liquid flame retardant instead of cyclosiloxane, resulting in a significant decrease in the removal effect of the dry cleaning solvent composition on oil-soluble stains.

[0103] Compared to Example 1, Comparative Example 3 used chloroalkanes 52 instead of an organophosphorus liquid flame retardant. This flame retardant lacks detergency, resulting in a significant decrease in the removal efficiency of the dry cleaning solvent composition for oil-soluble stains. Furthermore, due to the high viscosity of chloroalkanes 52 and its poor compatibility with other components in the dry cleaning solvent composition, the effectiveness of each component was affected. Therefore, the dry cleaning solvent composition provided in Comparative Example 3 also showed a decrease in the removal efficiency of pigment-based and water-soluble stains.

[0104] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dry cleaning solvent composition, wherein, The dry cleaning solvent composition comprises: Saturated cyclosiloxanes, polyols, water, and organophosphorus liquid flame retardants.

2. The dry cleaning solvent composition according to claim 1, wherein, The dry cleaning solvent composition comprises the following components by volume: 3.5-10.5% saturated cyclosiloxane, 30-40% polyol, 20-25% water, and 35-40% organophosphorus liquid flame retardant.

3. The dry cleaning solvent composition according to claim 1 or 2, wherein, The saturated cyclosiloxane contains 4-7 silicon atoms.

4. The dry cleaning solvent composition according to any one of claims 1-3, wherein, The saturated cyclosiloxane is a saturated alkyl cyclosiloxane; Preferably, the repeating unit in the saturated alkylcyclosiloxane is Where R1 and R2 are each independently methyl or ethyl. Represents a connection key.

5. The dry cleaning solvent composition according to claim 4, wherein, The saturated alkylcyclosiloxane is selected from one or more of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecylcyclohexasiloxane.

6. The dry cleaning solvent composition according to any one of claims 1-5, wherein, The polyol has 2-6 carbon atoms; Preferably, the polyol is a diol and / or a triol.

7. The dry cleaning solvent composition according to claim 6, wherein, The polyol is selected from one or more of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, and dipropylene glycol; Preferably, the polyol is selected from one or more of 1,2-propanediol, 1,3-propanediol and dipropylene glycol.

8. The dry cleaning solvent composition according to any one of claims 1-7, wherein, The organophosphorus liquid flame retardant includes one or more of tetrahydroxymethylphosphoric acid, triethyl phosphate, tri(xylene) phosphate and dimethyl methylphosphonate, preferably triethyl phosphate.

9. The dry cleaning solvent composition according to any one of claims 1-8, wherein, The dry cleaning solvent composition also includes a surfactant; Preferably, the surfactant in the dry cleaning solvent composition has a volume content of 0.1-0.3%.

10. The dry cleaning solvent composition according to claim 9, wherein, The surfactant includes one or more of cationic surfactants, anionic surfactants, and nonionic surfactants, preferably nonionic surfactants; Preferably, the nonionic surfactant includes one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, polyethylene glycol fatty acid ester, and polyoxyethylene alkylamine.

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