Dry cleaning solution and dry cleaning agent composition

Abstract

To provide a dry cleaning solution that exhibits high cleaning power and is easy to use. [Solution] A dry cleaning solution comprising (A) hydrogen peroxide, (B) a nonionic surfactant, (C) water, and a dry cleaning solvent, wherein when cleaning an object to be cleaned using the dry cleaning solution, the concentration of (A) relative to the mass of the object to be cleaned is 0.01 to 0.72% owf, the concentration of (B) relative to the object to be cleaned is 0.12 to 7.8% owf, and the concentration of (C) relative to the object to be cleaned is 0.3 to 10.8% owf.

Description

[Technical Field]

[0001] The present invention relates to a cleaning solution for dry cleaning and a cleaning agent composition for dry cleaning. [Background technology]

[0002] As a general-purpose dry cleaning method, washing methods using petroleum-based solvents are widely known. Furthermore, various dry cleaning agents for general-purpose dry cleaning are being developed (for example, Patent Documents 1-4). On the other hand, organic solvents such as petroleum-based solvents have a significant impact on human health and the environment. For these reasons, in recent years, development of using liquid carbon dioxide as a solvent for dry cleaning has also been progressing (for example, Patent Documents 5 and 6).

[0003] For example, Patent Document 5 discloses a cleaning composition for dry cleaning that utilizes liquid carbon dioxide as a solvent, characterized by comprising a high-density gas, a hydrogen peroxide source, and an organic bleaching activator for that purpose.

[0004] Furthermore, for example, Patent Document 6 discloses a cleaning method comprising the steps of bringing clothing or fabric to be cleaned into contact with a liquid dry cleaning composition and separating the clothing or fabric from the liquid dry cleaning composition. Patent Document 2 discloses a mixture of carbon dioxide, water, a surfactant that does not contain a parent CO2 group, and an organic auxiliary solvent as the liquid dry cleaning composition described above. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Special Publication No. 2007-526404 [Patent Document 2] Japanese Patent Publication No. 2003-247160 [Patent Document 3] Japanese Patent Application Laid-Open No. 2006-70168 [Patent Document 4] Japanese Patent Application Laid-Open No. 2006-152219 [Patent Document 5] Japanese Patent Application Laid-Open No. 05-239494 [Patent Document 6] Japanese Patent Application Laid-Open No. 2001-514337 [Summary of the Invention] [Problems to be Solved by the Invention]

[0006] The cleaning composition described in Patent Document 5 contains a hydrogen peroxide source as a cleaning component, and hydrogen peroxide is exemplified as the hydrogen peroxide source. However, when the cleaning composition contains hydrogen peroxide, if the concentration of hydrogen peroxide is high, a peculiar odor (off-odor) may be felt when the cleaning composition adheres to the hand or when the washed clothes are touched with bare hands. Therefore, the cleaning composition containing hydrogen peroxide has a problem of poor usability (in other words, poor handling). In addition, like the liquid dry cleaning composition described in Patent Document 6, there is a problem that high detergency cannot be maintained when the main cleaning component is only a surfactant. In addition, the cleaning compositions described in Patent Documents 1 to 4 are cleaning compositions used for general dry cleaning as described above. Such conventional cleaning compositions often have high detergency against specific stains, and for example, there is a problem that they cannot cope with various types of stains such as sebum stains, carbon stains, and blood stains.

[0007] An object of the present invention is to provide a cleaning liquid for dry cleaning and a cleaning agent composition for dry cleaning that have high detergency and excellent usability. [Means for Solving the Problems]

[0008] The inventors conducted diligent research to achieve the above objectives and found that by combining hydrogen peroxide, a surfactant, and water in a specific ratio, it is possible to maintain high cleaning power without any usability issues. Furthermore, they found that in a dry cleaning solution, by defining the amount (concentration) of the above-mentioned hydrogen peroxide, surfactant, and water as a ratio to the mass of the item to be cleaned (%owf), it is possible to achieve both high cleaning power and excellent usability. Here, owf is an abbreviation for "on the weight of fiber." The unit "%owf" generally represents the concentration of dye in a textile product, but in this specification, it means the percentage of the ratio of the volume x (ml) of each component in the cleaning solution to the mass w (g) of the item to be cleaned (=x / w × 100%). They also found that by combining anionic surfactants or polymers in the above-mentioned combination, discoloration and color transfer can be suppressed. Furthermore, they found that by using a specific solvent, not only is solubility in dry cleaning solvents improved, but high cleaning power is also exhibited. The present invention is based on the above findings and has the following embodiments.

[0009] <1> (A) Hydrogen peroxide and (B) Nonionic surfactants (excluding tristyrene-modified phenol ethoxylates) and (C) Water and, A dry cleaning solvent is included, In washing items to be washed, The concentration of component (A) relative to the object being washed is 0.01 to 0.72% owf, expressed as a percentage of the ratio of the volume a (ml) of component (A) to the mass w (g) of the object being washed (= a / w × 100%). The concentration of component (B) relative to the object being washed is 0.12 to 7.8% owf, expressed as a percentage of the ratio of the volume b (ml) of component (B) to the mass w (g) of the object being washed (= b / w × 100%). A cleaning solution for dry cleaning, wherein the concentration of component (C) relative to the object to be cleaned is 0.3 to 10.8% owf, expressed as a percentage of the ratio of the volume c (ml) of component (C) to the mass w (g) of the object to be cleaned (= c / w × 100%). <2> The concentration of component (A) relative to the item being washed is 0.06 to 0.6% owf. The concentration of component (B) relative to the item being washed is 0.6 to 6% owf. The concentration of component (C) relative to the item being washed is 1.5 to 9% owf. <1> The dry cleaning solution described in [the relevant document]. <3> The aforementioned component (B) is a nonionic surfactant represented by the following formula (1): <1> or <2> The dry cleaning solution described in [the relevant document]. [ka] (In equation (1), x represents the average number of repeating [CH2CH2O] cells, ranging from 5 to 15; y represents the average number of repeating [CH2CH(CH3)O] cells, ranging from 2.5 to 18; and n and m are numbers representing the average number of repeating (CH2) cells, respectively, with the sum of n and m ranging from 9 to 11.) <4> (D) Components: At least one selected from the group consisting of anionic surfactants, tristyrene-modified phenol ethoxylates, and water-soluble polymer compounds, (E) Components: A non-aqueous solvent, further comprising The concentration of component (D) relative to the object being washed is 0.01 to 0.6% owf, expressed as the percentage of the ratio of the volume d (ml) of component (D) to the mass w (g) of the object being washed (= d / w × 100%). The concentration of component (E) relative to the object being washed is 0.7 to 10.8% owf, expressed as the percentage of the ratio of the volume e (ml) of component (E) to the mass w (g) of the object being washed (= e / w × 100%). <1> ~ <3> A dry cleaning solution as described in any one of the items. <5> The (D) component contains at least one selected from the group consisting of anionic surfactants and water-soluble polymer compounds, at a concentration of 0.01 to 0.6% owf relative to the mass w (g) of the object to be washed, and The (E) component includes a non-aqueous solvent with an HLB value of 30 or less, at a concentration of 0.7 to 10.8% owf relative to the mass w (g) of the object to be washed. <4> The dry cleaning solution described in [the relevant document]. <6> The (D) component contains at least one selected from the group consisting of linear alkylbenzene sulfonic acid, polyoxyethylene alkyl ether sodium sulfate, and a water-soluble polymer having alkylene terephthalate units and / or alkylene isophthalate units and oxyalkylene units and / or polyoxyalkylene units, in such a concentration of 0.01 to 0.6% owf relative to the mass w (g) of the object to be washed, and The (E) component contains diethylene glycol monobutyl ether at a concentration of 0.7 to 10.8% owf relative to the mass w (g) of the object to be washed. <4> The dry cleaning solution described in [the relevant document]. <7> The dry cleaning solvent is liquid carbon dioxide. <1> ~ <6> A dry cleaning solution as described in any one of the items. <8> A cleaning agent composition for dry cleaning, (A) Components: Hydrogen peroxide and (B) Components: Nonionic surfactants (excluding tristyrene-modified phenol ethoxylate) and (C) Ingredients: Contains water, The content of component (A) in the dry cleaning detergent composition is 0.083 to 6% by mass. The content of component (B) in the dry cleaning detergent composition is 1 to 62.5% by mass. A dry cleaning detergent composition wherein the content of component (C) in the dry cleaning detergent composition is 2.5 to 90% by mass. <9> (D) component: at least one selected from the group consisting of anionic surfactants, tristyrene-modified phenol ethoxylates, and water-soluble polymer compounds, and (E) component: a non-aqueous solvent, further comprising The content of component (D) in the dry cleaning detergent composition is 0.1 to 5% by mass. The content of component (E) in the dry cleaning detergent composition is 5 to 90% by mass. <8> A cleaning agent composition for dry cleaning as described above. <10> Used in dry cleaning with liquid carbon dioxide as the dry cleaning solvent, <8> or <9> A cleaning agent composition for dry cleaning as described above. [Effects of the Invention]

[0010] The present invention provides a dry cleaning solution and a dry cleaning agent composition that have high cleaning power and excellent usability. [Modes for carrying out the invention]

[0011] The embodiments of the present invention will be described in detail below, but the present invention is not limited to the embodiments described below and can be implemented with various modifications within the scope of its gist. In this specification and in the claims, a numerical range represented by "~" means a numerical range that includes the numbers before and after "~" as the lower and upper limits, respectively. For example, A~B is synonymous with A or greater and B or less. Dry cleaning refers to the process of washing and drying items using a cleaning solution that primarily uses organic solvents as the cleaning medium to remove dirt. The term "owf" is a term of application meaning that is based on the dry mass of the fiber, and in this specification and claims, it means that it is based on the mass (dry mass) of the item to be washed. The term "%owf" refers to the percentage (=x / w × 100%) of the ratio of the volume x (ml) of each component in the dry cleaning solution to the mass (dry mass) of the item to be cleaned.

[0012] Dry cleaning solution The dry cleaning solution in this embodiment is a dry cleaning solution that is brought into contact with the item to be cleaned. The dry cleaning solution of this embodiment comprises component (A), component (B), component (C), and a dry cleaning solvent. For example, dry cleaning solvents include so-called petroleum-based solvents, chlorine-based solvents, fluorine-based solvents, and silicone-based solvents. In addition, to increase density, liquid carbon dioxide and gases under conditions higher than normal (atmospheric) pressure can be used as dry cleaning solvents. Hereinafter, dry cleaning, which involves cleaning items with a dry cleaning solution containing the dry cleaning solvents mentioned above, will also be simply referred to as "dry cleaning." Furthermore, dry cleaning using liquefied carbon dioxide as the dry cleaning solvent will also be simply referred to as "dry cleaning using liquid carbon dioxide" or "CO2 dry cleaning."

[0013] In the dry cleaning solution of this embodiment, component (A) is hydrogen peroxide, component (B) is a nonionic surfactant (excluding tristyrene-modified phenol ethoxylate), and component (C) is water. That is, the dry cleaning solution of this embodiment is a cleaning solution (hereinafter also simply referred to as "cleaning solution") that contains at least hydrogen peroxide as component (A), a nonionic surfactant as component (B), and water as component (C) in the dry cleaning solvent.

[0014] In the dry cleaning solution of this embodiment, the amounts (concentrations) of components (A), (B), and (C) are expressed as a percentage of the ratio of the volume x (ml) of each component in the cleaning solution to the mass w (g) of the object to be cleaned (=x / w × 100%), and are expressed in units of "%owf". Hereinafter, the concentrations of components (A), (B), and (C) refer to the amounts expressed in the above-mentioned units of "%owf". The concentrations of components (A), (B), and (C) expressed in the above-mentioned units of "%owf" are also called the "concentration relative to the object to be cleaned". Specifically, in the cleaning of an object to be washed using the dry cleaning solution of this embodiment, the respective concentrations (%owf) of component (A), component (B), and component (C) relative to the object to be washed are as follows. The concentration of component (A) relative to the object being washed is 0.01 to 0.72% owf, expressed as the percentage of the ratio of the volume a (ml) of component (A) to the mass w (g) of the object being washed (= a / w × 100%). The concentration of component (B) relative to the object being washed is 0.12 to 7.8% owf, expressed as the percentage of the ratio of the volume b (ml) of component (B) to the mass w (g) of the object being washed (= b / w × 100%). The concentration of component (C) relative to the object being washed is 0.3 to 10.8% owf, expressed as the percentage of the ratio of the volume c (ml) of component (C) to the mass w (g) of the object being washed (= c / w × 100%).

[0015] The dry cleaning solution of this embodiment has high cleaning power and excellent usability. Specifically, a high cleaning power is achieved in dry cleaning by having a hydrogen peroxide concentration of Component (A) relative to the garment being washed at 0.01% owf or higher. Furthermore, a hydrogen peroxide concentration of Component (A) relative to the garment being washed at 0.72% owf or lower reduces the odor when the cleaning solution comes into contact with the hands or when the washed garments are touched with bare hands, resulting in superior usability. (B) The concentration of the nonionic surfactant as component relative to the material being washed is 0.12 to 7.8% owf, which enables high cleaning power in dry cleaning. (C) A water concentration of 0.3% owf or higher relative to the material being washed ensures high cleaning power in dry cleaning. Furthermore, a water concentration of 10.8% owf or lower relative to the material being washed maintains high cleaning power while suppressing wetting and uneven washing of clothing and other items being washed, thereby improving usability.

[0016] <(A) component> Component (A) is hydrogen peroxide. In cleaning garments using the dry cleaning solution of this embodiment, the concentration of component (A) relative to the garment is 0.01 to 0.72% owf, preferably 0.03 to 0.3% owf, and more preferably 0.05 to 0.25% owf. When the concentration of component (A) relative to the garment is above the lower limit of the above numerical range, high cleaning power is achieved. Furthermore, when the concentration of component (A) relative to the garment is below the upper limit of the above numerical range, the odor is less noticeable when the cleaning solution comes into contact with the hands or when the cleaned garment is touched with bare hands, resulting in excellent usability.

[0017] (A) For the hydrogen peroxide component, commercially available hydrogen peroxide can be used, for example.

[0018] <(B) component> Component (B) is a nonionic surfactant. However, the nonionic surfactant of component (B) shall not contain tristyrenated phenol ethoxylate. In cleaning items to be washed using the dry cleaning solution of this embodiment, the concentration of component (B) relative to the item to be washed is 0.12 to 7.8% owf, preferably 0.6 to 6% owf, and more preferably 0.7 to 4.5% owf. When the concentration of component (B) relative to the item to be washed is above the lower limit of the above numerical range, high cleaning power is achieved. When the concentration of component (B) relative to the item to be washed is below the upper limit of the above numerical range, there is less undissolved component (B), and the usability of the dry cleaning solution is further improved.

[0019] (B) The nonionic surfactant as component (B) may be a single nonionic surfactant or two or more nonionic surfactants may be used in combination. Preferred examples of nonionic surfactants as component (B) are described below.

[0020] (Polyoxyethylene-polyoxypropylene alkyl ether) Among nonionic surfactants, polyoxyethylene polyoxypropylene alkyl ether represented by the following formula (2) is more preferred. R 1 -O-[EO] h -[PO] j -H ···(2) In equation (2) above, R 1 is a hydrocarbon group having 6 to 24 carbon atoms, EO is an oxyethylene group, and PO is an oxypropylene group. h is a number from 0 to 20 representing the average number of repeats of EO, and j is a number from 0 to 20 representing the average number of repeats of PO. Note that in the above formula (2), h and j can never both be 0. In equation (2) above, R 1 It is more preferable that is a secondary alkyl group having 12 to 14 carbon atoms. Furthermore, in formula (2) above, h, which represents the average number of repeating groups of EO, is more preferably a number between 5 and 15, and j, which represents the average number of repeating groups of PO, is more preferably 2.5 to 18. Examples of such polyoxyethylene polyoxypropylene alkyl ethers include the compound shown in formula (1) below.

[0021] [ka] (In equation (1), x represents the average number of repeating cells in [CH2CH2O] and ranges from 5 to 15, y represents the average number of repeating cells in [CH2CH(CH3)O] and ranges from 2.5 to 18, and n and m are numbers representing the average number of repeating cells in (CH2), respectively, with the sum of n and m being between 9 and 11.)

[0022] By containing the compound represented by the above formula (1) such that the concentration of the component (B) relative to the object to be washed is 0.12% owf or more, high detergency is achieved. Further, by containing the compound represented by the above formula (1) such that the concentration of the component (B) relative to the object to be washed is 7.8% owf or less, the undissolved residue of the component (B) is reduced, and the usability of the cleaning liquid for dry cleaning is further improved.

[0023] The polyoxyethylene polyoxypropylene alkyl ether used as the component (B) is not particularly limited, and examples thereof include Softanol (registered trademark) manufactured by Nippon Shokubai Co., Ltd. More specifically, the following trade names can be exemplified: "Softanol EP 9050", "Softanol EP 5035", "Softanol EP 7025", "Softanol EP 7045", "Softanol EP 7085", "Softanol EP 9050", "Softanol EP 90150", "Softanol EP 12030". The above Softanol is obtained by adding 5 to 12 moles of ethylene oxide and 2 to 15 moles of propylene oxide equivalent to 1 mole of secondary alcohol. For example, in the above formula (2), R 1 is an alkyl group having 12 to 14 carbon atoms, the carbon atom of R 1 is a secondary carbon atom, h is 5 to 12, and j is 2.5 to 15.

[0024] (Polyoxyethylene glyceryl triisostearate) The nonionic surfactant as the component (B) may be a compound represented by the following formula (3). C3H5O3-([EO] p -CO-R 2 ) q ···(3) In the above formula (3), R 2 is a hydrocarbon group having 17 carbon atoms, q is a number of 1 to 3 indicating the number of stearic acid, EO is an oxyethylene group, and p is a number of 0 to 50 indicating the average repeating number of EO. In formula (3) above, the number of q, which represents the number of stearic acid molecules, is more preferably 3, and the average number of repeating EOs for the entire compound shown in formula (3) is more preferably 3 to 20. An example of such a compound is polyoxyethylene glyceryl triisostearate, shown in formula (4) below. In formula (4) below, p represents the average number of repeating oxyethylene groups (EOs), and the average number of repeating EOs for the entire compound is more preferably 3 to 20.

[0025] [ka]

[0026] High cleaning power is achieved by including the compound shown in formula (4) above such that the concentration of component (B) relative to the material being washed is 0.12% owf or higher. Furthermore, by including the compound shown in formula (4) above such that the concentration of component (B) relative to the material being washed is 7.8% owf or lower, the amount of undissolved component (B) is reduced, further improving the usability of the dry cleaning solution.

[0027] (B) The polyoxyethylene glyceryl triisostearate used as component is not particularly limited, but examples include the following products manufactured by Nippon Emulsion Co., Ltd.: "EMALEX GWIS-303", "EMALEX GWIS-310", "EMALEX GWIS-315", and "EMALEX GWIS-320".

[0028] (Polyoxyethylene alkyl ether) The nonionic surfactant as component (B) may be a polyoxyethylene alkyl ether represented by the following formula (5). R 3 -O-[EO] S -H ···(5) In the above equation (5), R 3 is an alkyl group having 6 to 24 carbon atoms, EO is an oxyethylene group, and s is a number from 1 to 20 indicating the average number of repeats of EO. In equation (5) above, R3 It is more preferable that is an alkyl group having 10 to 13 carbon atoms. Furthermore, in formula (5) above, it is more preferable that s, which represents the average number of repeating EOs, is a number between 3 and 5.

[0029] High cleaning power is achieved by including the polyoxyethylene alkyl ether represented by formula (5) above such that the concentration of component (B) relative to the material being washed is 0.12% owf or higher. Furthermore, by including the polyoxyethylene alkyl ether represented by formula (5) above such that the concentration of component (B) relative to the material being washed is 7.8% owf or lower, the amount of undissolved component (B) is reduced, further improving the usability of the dry cleaning solution.

[0030] (B) The polyoxyethylene alkyl ether used as component is not particularly limited, but examples include the following products manufactured by BASF: "Lutensol XP30", "Lutensol XP40", "Lutensol XP50", and "Lutensol TO3".

[0031] (Polyether-modified silicone) The nonionic surfactant as component (B) may be a POE-modified silicone represented by the following formula (6).

[0032] [ka]

[0033] In the above formula (6), R 4 and R 5 Each of these is an independent hydrocarbon group, and t, u, a, and b are the average degree of polymerization (average number of repetitions), respectively.

[0034] The hydrophilic-hydrophobic balance (hereinafter also referred to as "HLB value" or simply "HLB") of the compound shown in formula (6) above is preferably, for example, 3 to 10, or 4 to 7. The HLB value is a value measured by the following method. The HLB value is generally a numerical value that quantifies the balance of hydrophilicity and lipophilicity, and the larger the HLB value, the more hydrophilic the property. In this specification, the HLB value is the value obtained by the Davis calculation method. The method for calculating the HLB value by the Davis calculation method is described in Proc. 2nd Intern. Congress of Surface Activity, vol. 1 (1957), p. 426.

[0035] High cleaning power is achieved by including the compound shown in formula (6) above such that the concentration of component (B) relative to the material being washed is 0.12% owf or higher. Furthermore, by including the compound shown in formula (6) above such that the concentration of component (B) relative to the material being washed is 7.8% owf or lower, the amount of undissolved component (B) is reduced, further improving the usability of the dry cleaning solution.

[0036] (B) The POE-modified silicone used as component is not particularly limited, but examples include poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer (HLB 7.0, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-6012"), polyoxyethylene-methylpolysiloxane copolymer (HLB 4.5, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-6017"), and polyether-modified organopolysiloxane (HLB 4.0, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-6020").

[0037] Furthermore, in the dry cleaning solution of this embodiment, although not particularly limited, for example, the ratio of the mass of component (B) to the mass of component (A) ((B) / (A)) is preferably greater than 4, more preferably 5 or more, and even more preferably 7.5 or more. When the mass ratio of (B) / (A) is within the above range, the generation of off-odors can be suppressed and usability can be improved.

[0038] <(C) component> Component (C) is water. In washing items to be washed using the dry cleaning solution of this embodiment, the concentration of component (C) relative to the item to be washed is 0.3 to 10.8% OWF, preferably 1.5 to 9% OWF, and more preferably 2 to 8% OWF. When the concentration of component (C) relative to the item to be washed is above the lower limit of the above numerical range, high cleaning power is achieved. Furthermore, when the concentration of component (C) relative to the item to be washed is below the upper limit of the above numerical range, high cleaning power can be maintained while suppressing wetting and uneven washing of items to be washed, such as clothing, and improving usability.

[0039] (C) The water used as component can be any of the following: tap water, purified water, pure water, distilled water, or deionized water. Among these, purified water, pure water, distilled water, and deionized water are preferred.

[0040] In the dry cleaning solution of this embodiment, although not particularly limited, for example, the ratio of the mass of component (A) to the mass of component (C) ((A) / (C)) is preferably 0.0009 to 2.4, more preferably 0.003 to 0.6, and even more preferably 0.006 to 0.13. For example, if the mass ratio of (A) / (C) is above the lower limit of the above numerical range, it is preferable in terms of high cleaning power. On the other hand, if the mass ratio of (A) / (C) is below the upper limit of the above numerical range, it is preferable in terms of suppressing wetting and uneven cleaning of items to be washed, such as clothing, and improving usability.

[0041] Furthermore, in the dry cleaning solution of this embodiment, although not particularly limited, for example, the ratio of the mass of component (B) to the mass of component (C) ((B) / (C)) is preferably 0.01 to 12, more preferably 0.06 to 4, and even more preferably 0.08 to 2.5. For example, if the mass ratio of (B) / (C) is above the lower limit of the above numerical range, it is preferable in that it suppresses wetting and uneven cleaning of items to be washed, such as clothing, and improves usability. On the other hand, if the mass ratio of (B) / (C) is below the upper limit of the above numerical range, it is preferable in that there is less undissolved residue, which further improves the usability of the dry cleaning solution.

[0042] <Optional ingredients> The dry cleaning solution of this embodiment may contain components other than components (A), (B), and (C) (optional components). Examples of optional components include components (D) and (E) below. Furthermore, optional components are not particularly limited, but may include chelating agents, fragrances, preservatives, pH adjusters, etc.

[0043] <(D) component> Component (D) is at least one selected from the group consisting of anionic surfactants, tristyrene-modified phenol ethoxylates, and water-soluble polymer compounds. Including such component (D) can also suppress decolorization and color transfer. In cleaning an object to be cleaned using the dry cleaning solution of this embodiment, the concentration of component (D) relative to the object to be cleaned, expressed as a percentage of the ratio of the volume d (ml) of component (D) to the mass w (g) of the object to be cleaned (=d / w × 100%), is preferably 0.01 to 0.6% owf, more preferably 0.05 to 0.4% owf, and even more preferably 0.075 to 0.3% owf. If the concentration of component (D) relative to the object to be cleaned is above the lower limit of the above numerical range, discoloration and color transfer can be suppressed. If the concentration of component (D) relative to the object to be cleaned is below the upper limit of the above numerical range, there will be less undissolved component (D), which is preferable in terms of high cleaning power.

[0044] Component (D) may be one selected from the group consisting of anionic surfactants, tristyrene-modified phenol ethoxylates, and water-soluble polymer compounds, either alone or in combination of two or more. Furthermore, if at least an anionic surfactant is used as component (D), one anionic surfactant may be used alone or in combination of two or more. Additionally, if at least a water-soluble polymer compound is used as component (D), one water-soluble polymer compound may be used alone or in combination of two or more. Preferred examples of anionic surfactants and water-soluble polymer compounds as component (D) will be described below.

[0045] (Sodium linear alkylbenzene sulfonate) The anionic surfactant of component (D) may be sodium linear alkylbenzene sulfonate represented by the following formula (7). Sodium linear alkylbenzene sulfonate represented by the following formula (7) is an anionic surfactant. R 6 -C6H4-SO3Na ···(7) In equation (7) above, R 6 It is a linear hydrocarbon group having 8 to 24 carbon atoms, and preferably a linear alkyl group having 12 to 14 carbon atoms.

[0046] By including the compound represented by formula (7) above in such a way that the concentration of component (D) relative to the item being washed is above the lower limit of the above numerical range, discoloration and color transfer can be suppressed. Furthermore, by including the compound represented by formula (7) above in such a way that the concentration of component (D) relative to the item being washed is below the upper limit of the above numerical range, the amount of undissolved component (D) is reduced, which is preferable in terms of high cleaning power.

[0047] An example of the compound represented by formula (7) above is sodium linear alkylbenzene sulfonate (10-14 carbon atoms), manufactured by Lion Specialty Chemicals, trade name "Lypon LS-250".

[0048] (Sodium polyoxyethylene alkyl ether sulfate) The anionic surfactant of component (D) may be sodium polyoxyethylene alkyl ether sulfate represented by the following formula (8). Sodium polyoxyethylene alkyl ether sulfate represented by the following formula (8) is an anionic surfactant. R 7 -O-[EO] v -SO3Na ···(8) In the above equation (8), R 7 is a hydrocarbon group with 8 to 24 carbon atoms, EO is an oxyethylene group, and v is a number from 0 to 10 indicating the average number of repeats of EO. In the above equation (8), R 7It is more preferable that the group is an alkylene group with 12 to 14 carbon atoms. It is more preferable that the average number of repeating EOs is 1 to 3.

[0049] By including the compound represented by formula (8) above in such a way that the concentration of component (D) relative to the item being washed is above the lower limit of the above numerical range, discoloration and color transfer can be suppressed. Furthermore, by including the compound represented by formula (8) above in such a way that the concentration of component (D) relative to the item being washed is below the upper limit of the above numerical range, the amount of undissolved component (D) is reduced, which is preferable in terms of high cleaning power.

[0050] The sodium polyoxyethylene alkyl ether sulfate used as component (D) is not particularly limited, but for example, R of formula (8) above. 7 An example is sodium polyoxyethylene alkyl ether sulfate with an alkylene group having 12 to 14 carbon atoms (average number of added moles of EO is 1). Furthermore, examples of polyoxyethylene alkyl ether sodium sulfate used as component (D) include polyoxyethylene lauryl ether sodium sulfate (average number of added moles of EO is 2, trade name "Sinoline SPE-1250" manufactured by Shin-Nippon Rika Co., Ltd.) and polyoxyethylene lauryl ether sodium sulfate (average number of added moles of EO is 3, trade name "Sinoline SPE-1350" manufactured by Shin-Nippon Rika Co., Ltd.).

[0051] (Tristylenized phenol ethoxylate) The tristyrenated phenol ethoxylate of component (D) may be a compound represented by the following formula (11).

[0052] [ka]

[0053] In equation (11) above, n is a number representing the average number of repetitions of (OCH2CH2), and is between 3 and 50. For example, for the tristylenized phenol ethoxylate of component (D), n is preferably 9 to 24.

[0054] (Water-soluble polymer compound) (D) The water-soluble polymer compound as component is a It is a water-soluble polymer having lurylene terephthalate units and / or alkylene isophthalate units and oxyalkylene units and / or polyoxyalkylene units.

[0055] Of the "alkylene terephthalate units and / or alkylene isophthalate units" (hereinafter also referred to as c1 units) that constitute the water-soluble polymer compound of component (D), the alkylene terephthalate unit is the unit shown in the following formula (12).

[0056] [ka] (In formula (12), R 21 (This is a lower alkylene group.)

[0057] R in equation (12) 21 The number of carbon atoms is 1 to 4, preferably 2 to 4. Specific examples of alkylene terephthalate units include ethylene terephthalate units, n-propylene terephthalate units, isopropylene terephthalate units, n-butylene terephthalate units, isobutylene terephthalate units, sec-butylene terephthalate units, tert-butylene terephthalate units, and so on. Among these, isopropylene terephthalate units are preferred. As the c1 unit, a single type of alkylene terephthalate unit may be used alone, or multiple types of alkylene terephthalate units may be used in combination.

[0058] (D) Among the c1 units that make up the water-soluble polymer compound, the alkylene isophthalate unit is the unit shown in the following formula (13).

[0059] [ka] (In formula (13), R22 (This is a lower alkylene group.)

[0060] R in equation (13) 22 The number of carbon atoms is 1 to 4, preferably 2 to 4. Specific examples of alkylene isophthalate units include, for example, ethylene isophthalate units, propylene isophthalate units, n-butylene isophthalate units, sec-butylene isophthalate units, and tert-butylene isophthalate units. Among these, propylene isophthalate units are preferred. As the c1 unit, a single type of alkylene isophthalate unit may be used alone, or multiple types of alkylene isophthalate units may be used in combination.

[0061] The c1 unit can be selected from the alkylene terephthalate unit and alkylene isophthalate unit, either alone or in combination of two or more. That is, the c1 unit may consist only of alkylene terephthalate units, only of alkylene isophthalate units, or a mixture of alkylene terephthalate units and alkylene isophthalate units.

[0062] The "oxyalkylene units and polyoxyalkylene units" (hereinafter also referred to as c2 units) that constitute the water-soluble polymer compound of component (D) are the units shown in formula (14) below. -(R 23 O) s - ···(14) (In formula (14), R 23 (where is a lower alkylene group, and s is an integer between 1 and 100.)

[0063] R in equation (14) 23 The number of carbon atoms is 1 to 4, preferably 2 to 4. In formula (14), if S is 1, it becomes an oxyalkylene unit, and if S is 2 or more, it becomes a polyoxyalkylene unit. S is an integer between 1 and 100, preferably between 1 and 80, and particularly preferably between 1 and 50. Specific examples of c2 units include oxyethylene units and polyoxyethylene units; oxypropylene units and polyoxypropylene units; and polyoxyethylene-polyoxypropylene units, with oxyethylene units and polyoxyethylene units being preferred. The c2 unit can be selected from the above-mentioned oxyalkylene unit and polyoxyalkylene unit, either alone or in combination of two or more. That is, the c2 unit may consist only of oxyalkylene units, only of polyoxyalkylene units, or a mixture of oxyalkylene units and polyoxyalkylene units.

[0064] The water-soluble polymer compound of component (D) is preferably a polymer compound in which the above-mentioned c1 units and c2 units are polymerized randomly or in blocks, and is particularly preferred if polymerized in blocks. The water-soluble polymer compound of component (D) may contain units other than the c1 and c2 units described above (for example, units derived from polymerization initiators, polymerization inhibitors, etc., or other copolymerizable units). In that case, it is preferable that 80 mol% or more, preferably 90 mol% or more, of the water-soluble polymer compound of component (D) consists of c1 and c2 units.

[0065] (D) The water-soluble polymer compound of component (D) refers to a substance that completely dissolves when 10 g of the water-soluble polymer compound is added to 1000 g of water at 40°C and stirred for 12 hours (200 rpm) with a stirrer (8 mm in diameter, 50 mm in length, 1 liter beaker).

[0066] Suitable specific examples of the water-soluble polymer compound of component (D) include the compounds represented by the following formulas (15) or (16).

[0067] [ka] (In formula (15), A and B are each independently a hydrogen atom or a methyl group, preferably both are methyl groups, and R 1 and R 2 Each of these is independently an alkylene group having 2 to 4 carbon atoms, preferably an alkylene group having 2 to 3 carbon atoms; X is 0 to 10, preferably 0.5 to 5, particularly preferably 0.5 to 2.5; and y is 1 to 100, preferably 1 to 80, more preferably 1 to 50, even more preferably 10 to 50, particularly preferably 20 to 30.

[0068] [ka] (In formula (16), A and B are each independently a hydrogen atom or a methyl group, preferably both are methyl groups, and R 1 and R 2 Each of these is independently an alkylene group having 2 to 4 carbon atoms, preferably an alkylene group having 2 to 3 carbon atoms; X is 0 to 10, preferably 0.5 to 5, particularly preferably 0.5 to 2.5; and y is 1 to 100, preferably 1 to 80, more preferably 1 to 50, even more preferably 10 to 50, particularly preferably 20 to 30.

[0069] In equations (15) and (16), the ratio of X to y is preferably 1:5 to 1:20, and more preferably 1:8 to 1:18.

[0070] The water-soluble polymer compound of component (D) preferably has a mass-average molecular weight of 500 to 8000. If the mass-average molecular weight is within the above range, it is excellent in terms of preventing color transfer. For example, although not particularly limited, the mass-average molecular weight of the water-soluble polymer compound is more preferably 800 to 7000, and even more preferably 1000 to 7000. The mass-average molecular weight of the water-soluble polymer compound of component (D) is the value obtained by measuring the value using GPC (gel permeation chromatography) with THF (tetrahydrofuran) as the solvent, and then converting it using PEG (polyethylene glycol) as the calibration curve.

[0071] The pH of the water-soluble polymer compound of component (D) (5% aqueous solution at 20°C) is preferably 3 to 7. The melting point of the water-soluble polymer compound of component (D) is preferably 25°C to 60°C. The viscosity (at 50°C) of the water-soluble polymer compound of component (D) is preferably 100 to 1000 mPa·s. The viscosity was measured using a Brookfield viscometer with rotor number 2.

[0072] (D) is a water-soluble polymer compound that is readily available on the market. It can also be produced by synthesis methods disclosed in the literature, such as those described in Journal of Polymer Science, Vol. 3, pp. 609-630 (1948), Journal of Polymer Science, Vol. 8, pp. 1-22 (1951), and Japanese Patent Publication No. 61-218699.

[0073] Examples of water-soluble polymer compounds as component (D) include a mixture of polyethylene glycol and a polymer containing constituent units derived from dimethyl terephthalate. For example, as the water-soluble polymer compound for component (D), commercially available products such as TexCare SRN-170C (manufactured by Clariant, mass-average molecular weight: 2000-3000) and TexCare SRN-240 (manufactured by Clariant, mass-average molecular weight: 6200, average number of EO added moles: 80.5) can be used. These water-soluble polymer compounds may be used individually or in combination of two or more. From the viewpoint of preventing color transfer, TexCare SRN-170C can be used more preferably as the water-soluble polymer compound. By including the above-mentioned water-soluble polymer compound such that the concentration of component (D) relative to the item being washed is above the lower limit of the above numerical range, decolorization and color transfer can be suppressed. Furthermore, by including the above-mentioned water-soluble polymer compound such that the concentration of component (D) relative to the item being washed is below the upper limit of the above numerical range, the amount of undissolved component (D) is reduced, which is preferable in terms of high cleaning power.

[0074] The dry cleaning solution of this embodiment preferably contains, as component (D), at least one selected from the group consisting of anionic surfactants and water-soluble polymer compounds, at a concentration of 0.01 to 0.6% owf relative to the mass w (g) of the item to be cleaned. Furthermore, the dry cleaning solution of this embodiment more preferably contains, as component (D), at least one selected from the group consisting of linear alkylbenzene sulfonic acid and water-soluble polymers having alkylene terephthalate units and / or alkylene isophthalate units and oxyalkylene units and / or polyoxyalkylene units, at a concentration of 0.01 to 0.6% owf relative to the mass w (g) of the item to be cleaned.

[0075] The ratio of the total mass of components (A) and (B) to the mass of component (D) (((A)+(B)) / (D)) is preferably 1.7 to 50, more preferably 4 to 25, and even more preferably 5 to 15. When the ratio of the total mass of components (A) and (B) to the mass of component (D) is equal to or greater than the lower limit, the amount of undissolved component (D) is reduced, and high cleaning power can be achieved. When the ratio of the total mass of components (A) and (B) to the mass of component (D) is equal to or less than the upper limit, the generation of off-odors is suppressed, and discoloration and color transfer can be suppressed.

[0076] <(E) component> Component (E) is a non-aqueous solvent. In cleaning an object to be cleaned using the dry cleaning solution of this embodiment, the concentration of component (E) relative to the object to be cleaned, expressed as a percentage of the ratio of the volume d (ml) of component (E) to the mass w (g) of the object to be cleaned (=e / w × 100%), is preferably 0.7 to 10.8% owf, more preferably 1.2 to 9.5% owf, and even more preferably 1.5 to 8.0% owf. A concentration of component (E) relative to the object to be cleaned above the lower limit of the above numerical range is preferable in terms of high cleaning power. A concentration of component (E) relative to the object to be cleaned below the upper limit of the above numerical range results in less undissolved component (E), further improving the usability of the dry cleaning solution.

[0077] The non-aqueous solvent for component (E) can be any of the following: lower alcohols, intermediate alcohols, higher alcohols, linear or branched hydrocarbons, silicone oils, diethylene glycol monoalkyl ethers, fatty acid esters, and other non-aqueous solvents.

[0078] The non-aqueous solvent for component (E) is not particularly limited, but examples include ethanol, hexane, diethylene glycol monobutyl ether, silicone oil, isopropyl myristate, diisopropyl adipate, and diethyl sebacate.

[0079] Component (E) preferably contains a non-aqueous solvent with a hydrophilic-hydrophobic balance (HLB value) of 30 or less. By including a non-aqueous solvent with an HLB value of 30 or less, the cleaning power is high while reducing the amount of undissolved component (E), further improving the usability of the cleaning solution for dry cleaning.

[0080] As the non-aqueous solvent for component (E), diethylene glycol monobutyl ether represented by the following formula (17) is preferred. It is preferable in terms of high cleaning power if the concentration of diethylene glycol monobutyl ether of component (E) relative to the material to be washed is above the lower limit of the above numerical range. If the concentration of diethylene glycol monobutyl ether of component (E) relative to the material to be washed is below the upper limit of the above numerical range, there will be less undissolved residue of component (E), and the usability of the cleaning solution for dry cleaning will be further improved.

[0081] [ka]

[0082] However, although not particularly limited, for example, if a dry cleaning solution is prepared by adding a composition containing at least one of components (A), (B), and (C) to a dry cleaning solvent, the solvent contained in the composition may further be included as a non-aqueous solvent of component (E).

[0083] The cleaning solution for dry cleaning in this embodiment more preferably contains, as component (D), at least one selected from the group consisting of anionic surfactants and water-soluble polymer compounds at a concentration of 0.01 to 0.6% owf relative to the material to be cleaned, and as component (E), a non-aqueous solvent with an HLB value of 30 or less at a concentration of 0.7 to 10.8% owf relative to the material to be cleaned. Furthermore, the cleaning solution for dry cleaning in this embodiment preferably contains, as component (D), at least one selected from the group consisting of linear alkylbenzene sulfonic acid, sodium polyoxyethylene alkyl ether sulfate, and a mixture of polyethylene glycol and a polymer containing constituent units derived from dimethyl terephthalate, at a concentration of 0.01 to 0.6% owf relative to the material to be cleaned, and as component (E), diethylene glycol monobutyl ether at a concentration of 0.7 to 10.8% owf relative to the material to be cleaned.

[0084] The ratio of the total mass of components (A), (B), and (C) to the mass of component (E) (((A)+(B)+(C)) / (E)) is preferably 0.1 to 10, more preferably 0.25 to 8, and even more preferably 0.5 to 5. When the mass ratio of the total mass of components (A), (B), and (C) to the mass of component (E) is above the lower limit, high cleaning performance is achieved. When the mass ratio of the total mass of components (A), (B), and (C) to the mass of component (E) is below the upper limit, the generation of off-odors is suppressed, and a decrease in usability (e.g., wetting of clothes, undissolved residue) can be suppressed.

[0085] <Other optional ingredients> (Chelating agent) Examples of chelating agents include organic chelating agents. Examples of chelating agents include organic phosphonic acid derivatives such as citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, gluconic acid, nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraaminehexaacetic acid, tetrasodium glutamate diacetate, tetrasodium 3-hydroxy-2,2'-iminodisuccinate, ethane-1,1-diphosphonic acid, ethane-1,1,2-triphosphonic acid, trisodium methylglycinediacetate, 1-hydroxyethane-1,1-diphosphonic acid, ethanehydroxy-1,1,2-triphosphonic acid, ethane-1,2-dicarboxy-1,2-diphosphonic acid, methanehydroxyphosphonic acid, aminotrimethylenephosphonic acid, and ethylenediaminetetraximethylenesulfonic acid, or salts thereof. Among these, citric acid and trisodium methylglycindiacetate are more preferred from the viewpoint of low-temperature stability. The chelating agent may be used alone or in combination of two or more. The content of each chelating agent is not particularly limited as long as it is sufficient to achieve the purpose of formulation, but is preferably 0.01 to 3% of the total mass of the components excluding the dry cleaning solvent in the dry cleaning solution (for example, the dry cleaning detergent composition described later).

[0086] (fragrance) Fragrance components that can be used as fragrances can be those commonly used in laundry detergents without particular restrictions, and can be appropriately selected according to the purpose. Examples include essential oils and absolutes commonly used in fabric softeners and laundry detergents, as well as synthetic perfume components such as hydrocarbons, alcohols, aldehydes, ketones, ethers, acetals, ketals, and nitriles. Examples of preferred fragrance components to be incorporated into fragrance compositions are those described in Japanese Patent Publication No. 2010-520928. Examples of fragrances include fragrance compositions A to D described in Tables 11 to 18 of Japanese Patent Publication No. 2002-146399, (a1-1) to (a1-15) described in Japanese Patent Publication No. 2022-35371, and fragrances a to d described in Japanese Patent Publication No. 2009-108248.

[0087] (Preservative) As for preservatives, those commonly used in laundry detergents can be used without particular restrictions. Specific examples include isothiazolone-based organosulfur compounds, benzisothiazolone-based organosulfur compounds, and benzoic acids.

[0088] Examples of isothiazolone-type organosulfur compounds include 5-chloro-2-methyl-4-isothiazolin-3-one (CMIT), 2-n-butyl-3-isothiazolon, 2-benzyl-3-isothiazolon, 2-phenyl-3-isothiazolon, 2-methyl-4,5-dichloroisothiazolon, 5-chloro-2-methyl-3-isothiazolon, 2-n-octyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one (MIT), and mixtures thereof. Among these, mixtures of 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, and 2-methyl-4-isothiazolin-3-one are preferred. In particular, a mixture of the former at approximately 77% by mass and the latter at approximately 23% by mass, or a diluted solution thereof (for example, isothiazolone solution), specifically, the product "Caisson CG-ICP" manufactured by Dow Chemical Corporation, is a preferred example.

[0089] Examples of benzisothiazolon-based organosulfur compounds include 1,2-benzisothiazolin-3-one (BIT), 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, related compounds such as dithio-2,2-bis(benzmethylamide), and mixtures thereof. Among these, 1,2-benzisothiazolin-3-one is particularly preferred, specifically the trade name "Nipperside" from Clariant, and the following trade names from Lonza: "Proxel BDN", "Proxel GXL", "Proxel XL", "Proxel LV", "Proxel CRL", "Proxel NBZ", "Proxel AM", and "Proxel B20".

[0090] Examples of benzoic acids include p-hydroxybenzoic acid or its salts, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate, and benzyl p-hydroxybenzoate. The amount of preservative is not particularly limited as long as it is sufficient to achieve the purpose of formulation, but it is preferably 0.0001 to 1% by mass relative to the total mass of the components excluding the dry cleaning solvent in the dry cleaning solution (for example, the dry cleaning detergent composition described later). If it is 0.0001% by mass or more, the preservative effect is sufficiently obtained, and if it is 1% by mass or less, the high storage stability of the composition can be sufficiently maintained.

[0091] <Dry cleaning solvent> Examples of dry cleaning solvents include so-called petroleum-based solvents, chlorine-based solvents, fluorine-based solvents, and silicone-based solvents.

[0092] Examples of petroleum-based solvents include those derived from the distillation of crude oil or its modifying components. There are no particular restrictions on the type of petroleum-based solvent, and it can be selected as appropriate depending on the purpose. Specific examples include paraffinic hydrocarbons, isoparaffinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons, or industrial gasoline, naphtha, etc. These petroleum-based solvents may be used individually or in combination of two or more types.

[0093] Examples of chlorinated solvents include compounds in which multiple chlorine atoms are bonded to carbon atoms in the structure of the organic compound constituting the solvent. There are no particular restrictions on chlorinated solvents, and they can be selected as appropriate depending on the purpose. Specific examples of chlorinated solvents include tetrachloroethylene, 1,1,1-trichloroethane, and trichloroethylene. These chlorinated solvents may be used individually or in combination of two or more.

[0094] Examples of fluorinated solvents include compounds in which a fluorine atom is bonded to a carbon atom in the structure of the organic compound constituting the solvent. There are no particular restrictions on fluorinated solvents, and they can be selected as appropriate depending on the purpose. Specific examples of fluorinated solvents include CFC-113 (1,1,2-trichloro-12,2-trifluoroethane), HCFC-1414b (1,1-dichloro-1-fluoroethane), HCFC-225 (dichloropantafluoropropane), HFC365mfc (1,1,1,3,3-pentafluorobutane), HFC-c447ef (1,1,2,2,3,3,4-heptafluorocyclopentane), and HFC-43-10mec (1,1,1,2,2,3,4,5,5,5-decafluoropentane). These fluorinated solvents may be used individually or in combination of two or more.

[0095] Any volatile silicone-based solvent can be used, such as linear organopolysiloxanes, cyclic organopolysiloxanes, and branched organopolysiloxanes. Examples of linear organopolysiloxanes include hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, tetradecamethylhexasiloxane, 1,3-dipropyltetramethyldisiloxane, 3-propylheptamethyltrisiloxane, and 3-hexylheptamethyltrisiloxane. Examples of cyclic organopolysiloxanes include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, propylheptamethylcyclotetrasiloxane, and 1,5-dipropylhexamethylcyclotetrasiloxane. Examples of branched organopolysiloxanes include tritrimethylsiloxyethylsilane, tritrimethylsiloxypropylsilane, tritrimethylsiloxybutylsilane, tritrimethylsiloxypentylsilane, tritrimethylsiloxyhexylsilane, tritrimethylsiloxyheptylsilane, tritrimethylsiloxyoctylsilane, tritrimethylsiloxynonylsilane, tritrimethylsiloxydecylsilane, tritrimethylsiloxidedecylsilane, tritrimethylsiloxytetradecylsilane, tritrimethylsiloxyhexadecylsilane, tritrimethylsiloxyoctadecylsilane, and tetrakis(trimethylsiloxy)silane.

[0096] The dry cleaning solvent may be a high-density gas. To increase the density, it is applied to a gas under conditions greater than normal (atmospheric) pressure. A suitable high-density gas is carbon dioxide. Alternatively, the dry cleaning solvent may be a liquefied high-density gas; for example, liquefied carbon dioxide can be used as a dry cleaning solvent.

[0097] <Liquid carbon dioxide> The dry cleaning solution of this embodiment may contain liquid carbon dioxide as a dry cleaning solvent. The liquid carbon dioxide exists in a liquid state in a temperature environment of 0 to 50°C under specific pressure conditions, and is not particularly limited, but pressure may be applied to maintain the cleaning solution in a liquid state within a specific temperature range. For example, the dry cleaning solution exists in a liquid state in an environment with a temperature of 0 to 31°C and a pressure of 3.5 to 7 MPa.

[0098] In the dry cleaning solution of this embodiment, there are no particular restrictions on the amount (concentration) of liquid carbon dioxide in the cleaning solution. It is sufficient that the solution contains an amount of liquid carbon dioxide such that the concentrations of each component (A), (B), and (C) relative to the item being cleaned satisfy the numerical ranges described above. For example, although there are no particular restrictions, the concentration of liquid carbon dioxide relative to the item being cleaned, expressed as a percentage of the ratio of the volume z (ml) of liquid carbon dioxide to the mass w (g) of the item being cleaned (=z / w × 100%), is preferably 200 to 10000%owf, more preferably 500 to 7500%owf, and even more preferably 1000 to 5000%owf.

[0099] Furthermore, although not particularly limited, for example, the ratio of the volume (ml) of liquid carbon dioxide (CO2) to the mass (g) of component (C) (CO2 / (C)) is preferably 9 to 325, more preferably 45 to 270, and even more preferably 60 to 240. For example, if the above-mentioned CO2 / (C) ratio is above the lower limit of the above numerical range, it is preferable in terms of high cleaning power. On the other hand, if the above-mentioned CO2 / (C) ratio is below the upper limit of the above numerical range, it is preferable in terms of the absence of unpleasant odors from clothing.

[0100] Liquid carbon dioxide is not particularly limited, and the liquid carbon dioxide used in known dry cleaning systems using liquid carbon dioxide can be used. For example, as a known dry cleaning system, a liquid carbon dioxide washing machine manufactured by Tersus Solutions (trade name "NEXUS ver2") can be mentioned. Hereinafter, an example of a cleaning method by dry cleaning for cleaning an object to be cleaned using liquid carbon dioxide will be described. Hereinafter, the cleaning method by dry cleaning for cleaning an object to be cleaned using liquid carbon dioxide will also be referred to as the "cleaning method by CO2 dry cleaning" or simply the "cleaning method".

[0101] <Cleaning Method by CO2 Dry Cleaning> As the cleaning method by CO2 dry cleaning, first, the object to be cleaned is placed in a treatment tank (also referred to as a cleaning tank) that has an opening / closing lid and can be sealed. The treatment tank is not particularly limited, but a treatment tank conventionally known for CO2 dry cleaning can be used. For example, although not shown in the drawings, examples of the treatment tank include a treatment tank composed of a horizontal outer tank and a rotary drum-type inner tank disposed inside thereof.

[0102] Next, each of the components (A), (B), and (C) described above is introduced into the treatment tank so that the concentration of each component relative to the object to be cleaned falls within the numerical range described above. The components (A), (B), and (C) may be introduced into the treatment tank in the state of a cleaning composition containing these components, or the components (A), (B), and (C) may be introduced individually so that the concentration of each component relative to the object to be cleaned falls within the numerical range described above. Also, two or more compositions containing at least one of the components (A), (B), and (C) may be blended.

[0103] Next, the treatment tank is filled with gaseous carbon dioxide and liquid carbon dioxide. Dry cleaning equipment for CO2 dry cleaning generally includes, for example, a carbon dioxide storage tank for storing carbon dioxide. In such dry cleaning equipment, liquid carbon dioxide is supplied from the carbon dioxide storage tank to the treatment tank via a supply pipe. Then, the liquid carbon dioxide is mixed with components (A), (B), and (C) that have been previously introduced into the treatment tank, thereby preparing a dry cleaning solution containing components (A), (B), and (C). An example of the dry cleaning solution in this embodiment is a cleaning solution prepared by mixing a composition prepared so that the contents of components (A), (B), and (C) are in predetermined ratios, as described above, with liquid carbon dioxide in the treatment tank. In the above method, an example was described in which components (A), (B), and (C) are introduced individually or as a cleaning composition into the treatment tank before it is filled with liquid carbon dioxide. However, the method is not limited to the above method. For example, components (A), (B), and (C) may be added to the liquid carbon dioxide before it is introduced into the treatment tank, and a dry cleaning solution may be prepared before it is introduced into the treatment tank.

[0104] The cleaning solution for dry cleaning in the treatment tank is prepared so that, based on the mass of the items to be cleaned, the concentration of component (A) relative to the items to be cleaned is 0.01 to 0.72% owf, the concentration of component (B) relative to the items to be cleaned is 0.12 to 7.8% owf, and the concentration of component (C) relative to the items to be cleaned is 0.3 to 10.8% owf.

[0105] Next, the items to be cleaned are brought into contact with the dry cleaning solution in the processing tank, thereby cleaning them with the cleaning solution. For example, after immersing the items in the cleaning solution, physical external forces such as agitation, rotation, dropping, or vibration are applied to clean them. Immersion allows the dirt components attached to the items to be cleaned to dissolve into the cleaning solution, and applying physical external forces allows the cleaning solution to penetrate into the finer details of the items, promoting the separation of fibers from dirt components and improving cleaning efficiency.

[0106] After washing, the object to be washed is separated from the washing solution containing dissolved dirt components, and the object to be washed is dried. For example, the washing solution containing carbon dioxide as the washing medium is discharged from the treatment tank to separate the object to be washed from the washing solution. At this time, if necessary, the treatment tank may be pressurized to promote the discharge of liquid carbon dioxide. Subsequently, the object to be washed, separated from the washing solution, is rinsed using liquid carbon dioxide as the washing medium. The rinsing process can be carried out by discharging the washing solution from the treatment tank, then injecting liquid carbon dioxide into the treatment tank again, bringing the object to be washed into contact with the liquid carbon dioxide, and rinsing by applying physical force. There are no particular limitations, but the rinsing process may be repeated two or more times. After that, the lid of the treatment tank is opened and the object to be washed is removed. At room temperature and pressure, the liquid carbon dioxide remaining on the object to be washed immediately vaporizes, so the object to be washed can be removed from the treatment tank in a dry state without going through a special drying process.

[0107] Meanwhile, the cleaning solution discharged from the treatment tank is introduced into a separation tank, for example, to vaporize and separate the carbon dioxide in the cleaning solution. By vaporizing the carbon dioxide from the cleaning solution introduced into the separation tank, the dirt dissolved in the cleaning solution, as well as components (A), (B), and (C), and any other arbitrary components, can be separated and removed. The gaseous carbon dioxide from which the dirt has been removed is then recovered by an appropriate method, liquefied by a cooling means, and reused as liquid carbon dioxide as a cleaning medium. In this way, dry cleaning (CO2 dry cleaning) can be performed using liquid carbon dioxide to clean the object to be cleaned. However, the cleaning method by CO2 dry cleaning is not limited to the method described above, and other CO2 dry cleaning methods using liquid carbon dioxide as the cleaning medium may also be used.

[0108] ≪Dry cleaning detergent composition≫ Next, the dry cleaning detergent composition of this embodiment will be described. The dry cleaning detergent composition of this embodiment is a dry cleaning detergent composition used for dry cleaning. As the dry cleaning solvent, various dry cleaning solvents described in the embodiments of the dry cleaning liquid described above can be used.

[0109] The dry cleaning detergent composition of this embodiment comprises component (A), component (B), and component (C). Component (A) is hydrogen peroxide, component (B) is a nonionic surfactant, and component (C) is water. In the dry cleaning detergent composition of this embodiment, the contents of components (A), (B), and (C) are as follows: The content of component (A) in the dry cleaning detergent composition is 0.083 to 6% by mass. The content of component (B) in the dry cleaning detergent composition is 1 to 62.5% by mass. The content of component (C) in the dry cleaning detergent composition is 2.5 to 90% by mass.

[0110] The dry cleaning detergent composition of this embodiment can be used as a detergent composition in dry cleaning, possessing high cleaning power and excellent usability. Specifically, by having the content of component (A) within the above numerical range, high cleaning power is achieved in dry cleaning, such as CO2 dry cleaning and dry cleaning using various other dry cleaning solvents. Furthermore, the odor is less noticeable when the cleaning solution comes into contact with the hands or when the cleaned clothes are touched with bare hands, resulting in excellent usability. (B) By having a content of component within the above numerical range, high cleaning power is achieved in dry cleaning, such as CO2 dry cleaning or dry cleaning using various other dry cleaning solvents. (C) By having the content of component within the above numerical range, high cleaning power is achieved in dry cleaning, such as CO2 dry cleaning and dry cleaning using various other dry cleaning solvents, and it is also possible to suppress wetting and uneven cleaning of items to be washed, such as clothing, and improve usability.

[0111] In the dry cleaning detergent composition of this embodiment, components (A), (B), and (C) can preferably be the same components (compounds) as components (A), (B), and (C) in the dry cleaning detergent solutions described above.

[0112] The content of component (A) in the dry cleaning detergent composition is 0.083 to 6% by mass, preferably 0.25 to 2.5% by mass, and more preferably 0.41 to 2.1% by mass. When the content of component (A) is above the lower limit of the above numerical range, high cleaning power is achieved. Furthermore, when the content of component (A) is below the upper limit of the above numerical range, the odor is less noticeable when the cleaning solution comes into contact with the hands or when the cleaned clothes are touched with bare hands, resulting in excellent usability.

[0113] The content of component (B) in the dry cleaning detergent composition is 1 to 62.5% by mass, preferably 5 to 50% by mass, and more preferably 5.8 to 38% by mass. When the content of component (B) is within the above numerical range, high cleaning power is achieved.

[0114] The content of component (C) in the dry cleaning detergent composition is 2.5 to 90% by mass, preferably 12.5 to 75% by mass, and more preferably 16 to 67% by mass. When the content of component (C) is above the lower limit of the above numerical range, high cleaning power is achieved. Furthermore, when the content of component (C) is below the upper limit of the above numerical range, high cleaning power can be maintained while suppressing wetting and uneven washing of items to be washed, such as clothing, and improving usability.

[0115] Furthermore, in the dry cleaning detergent composition of this embodiment, although not particularly limited, for example, the ratio of the mass of component (B) to the mass of component (A) ((B) / (A)) is preferably greater than 4, more preferably 5 or more, and even more preferably 7.5 or more. When the mass ratio of (B) / (A) is within the above range, the generation of off-odors can be suppressed and usability can be improved.

[0116] In the dry cleaning detergent composition of this embodiment, although not particularly limited, for example, the ratio of the mass of component (A) to the mass of component (C) ((A) / (C)) is preferably 0.0009 to 2.4, more preferably 0.003 to 0.6, and even more preferably 0.006 to 0.13. For example, if the mass ratio of (A) / (C) is above the lower limit of the above numerical range, it is preferable in terms of high cleaning power. On the other hand, if the mass ratio of (A) / (C) is below the upper limit of the above numerical range, it is preferable in terms of suppressing wetting and uneven cleaning of items to be washed, such as clothing, and improving usability.

[0117] Furthermore, in the dry cleaning detergent composition of this embodiment, although not particularly limited, for example, the ratio of the mass of component (B) to the mass of component (C) ((B) / (C)) is preferably 0.01 to 12, more preferably 0.06 to 4, and even more preferably 0.08 to 2.5. For example, if the mass ratio of (B) / (C) is above the lower limit of the above numerical range, it is preferable in that it suppresses wetting and uneven washing of items to be washed, such as clothing, and improves usability. On the other hand, if the mass ratio of (B) / (C) is below the upper limit of the above numerical range, it is preferable in that there is less undissolved residue, and the usability of the dry cleaning detergent is further improved.

[0118] <Optional ingredients> The dry cleaning detergent composition of this embodiment may contain components other than components (A), (B), and (C) (optional components). Examples of optional components include components (D) and (E) described in the dry cleaning solution of this embodiment. Furthermore, optional components are not particularly limited, but examples include solvents other than component (E), chelating agents, fragrances, preservatives, pH adjusters, etc. For these optional components, components (compounds) similar to those described above in the dry cleaning solution can be suitably used.

[0119] For example, the dry cleaning detergent composition of this embodiment may further contain, as component (D), at least one selected from the group consisting of anionic surfactants, tristyrene-modified phenol ethoxylates, and water-soluble polymer compounds. Including such a component (D) can further suppress discoloration and color transfer. Furthermore, the dry cleaning detergent composition of this embodiment may further contain a non-aqueous solvent as component (E). Including such component (E) reduces undissolved residue while maintaining high cleaning power, thereby further improving the usability of the dry cleaning solution.

[0120] The dry cleaning detergent composition of this embodiment more preferably further comprises at least one selected from the above group as component (D) and a non-aqueous solvent as component (E).

[0121] The content of component (D) in the dry cleaning detergent composition is preferably 0.1 to 5% by mass, more preferably 0.4 to 3.5% by mass, and even more preferably 0.6 to 2.5% by mass. When the content of component (D) is above the lower limit of the above numerical range, discoloration and color transfer can be suppressed. When the content of component (D) is below the upper limit of the above numerical range, there will be less undissolved component (D), which is preferable in terms of high cleaning power. Furthermore, the content of component (E) in the dry cleaning detergent composition is preferably 5 to 90% by mass, more preferably 10 to 80% by mass, and even more preferably 12.5 to 70% by mass. When the content of component (E) is above the lower limit of the above numerical range, it is preferable in terms of high cleaning power. When the content of component (E) is below the upper limit of the above numerical range, there is less undissolved component (E), and the usability of the dry cleaning detergent solution is further improved.

[0122] <Manufacturing method> The dry cleaning detergent composition of this embodiment is manufactured by a conventionally known manufacturing method. For example, it can be manufactured by mixing components (A), (B), and (C), along with any optional components as needed, and then adjusting the pH.

[0123] <How to use> The dry cleaning detergent composition of this embodiment is used in dry cleaning to prepare a cleaning solution containing components (A), (B), (C), and the dry cleaning solvent, by mixing with a dry cleaning solvent as a cleaning medium. For example, although not particularly limited, one method of using the dry cleaning detergent composition of this embodiment is to put the detergent composition together with the textile product to be cleaned into the processing tank of a dry cleaning apparatus using carbon dioxide, and clean the product by CO2 dry cleaning. Alternatively, if the dry cleaning apparatus is provided with an inlet for the detergent composition, the detergent composition may be put into the inlet and the product may be cleaned by CO2 dry cleaning. Furthermore, although not particularly limited, one method of using the dry cleaning detergent composition of this embodiment is to put the detergent composition together with the textile product to be washed into the processing tank of a dry cleaning apparatus using a dry cleaning solvent such as a petroleum-based solvent, a chlorine-based solvent, a fluorine-based solvent, or a silicone-based solvent, as described above, and wash the product by dry cleaning. [Examples]

[0124] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following description. The raw materials used in each example are as follows:

[0125] (Raw materials used) <(A) component> a-1: Hydrogen peroxide (35% by mass of industrial-grade hydrogen peroxide, manufactured by Mitsubishi Gas Chemical Company).

[0126] <(B) component> b-1: Polyoxyethylene polyoxypropylene alkyl ether (a polyoxyethylene polyoxypropylene alkyl ether having a secondary alkyl group in formula (1), where the sum of n and m is 9 to 11, x is 9, and y is 5; manufactured by Nippon Shokubai Co., Ltd., trade name "Softanol EP 9050"). b-2: Polyoxyethylene-polyoxypropylene alkyl ether (a polyoxyethylene polyoxypropylene alkyl ether having a secondary alkyl group in formula (1), where the sum of n and m is 9 to 11, x is 5, and y is 3.5, manufactured by Nippon Shokubai Co., Ltd., trade name "Softanol EP 5035"). b-3: Polyoxyethylene-polyoxypropylene alkyl ether (a polyoxyethylene polyoxypropylene alkyl ether having a secondary alkyl group in formula (1), where the sum of n and m is 9 to 11, x is 7, and y is 2.5, manufactured by Nippon Shokubai Co., Ltd., trade name "Softanol EP 7025"). b-4: Polyoxyethylene-polyoxypropylene alkyl ether (a polyoxyethylene polyoxypropylene alkyl ether having a secondary alkyl group in formula (1), where the sum of n and m is 9 to 11, x is 7, and y is 4.5, manufactured by Nippon Shokubai Co., Ltd., trade name "Softanol EP 7045"). b-5: Polyoxyethylene-polyoxypropylene alkyl ether (a polyoxyethylene polyoxypropylene alkyl ether having a secondary alkyl group in formula (1), where the sum of n and m is 9 to 11, x is 7, and y is 8.5, manufactured by Nippon Shokubai Co., Ltd., trade name "Softanol EP 7085"). b-6: Polyoxyethylene-polyoxypropylene alkyl ether (a polyoxyethylene polyoxypropylene alkyl ether having a secondary alkyl group in formula (1), where the sum of n and m is 9 to 11, x is 9, and y is 15, manufactured by Nippon Shokubai Co., Ltd., trade name "Softanol EP 90150"). b-7: Polyoxyethylene-polyoxypropylene alkyl ether (a polyoxyethylene polyoxypropylene alkyl ether having a secondary alkyl group in formula (1), where the sum of n and m is 9 to 11, x is 12, and y is 3; manufactured by Nippon Shokubai Co., Ltd., trade name "Softanol EP 12030"). b-8: Polyoxyethylene glyceryl triisostearate (a compound in formula (4) where p is 3, manufactured by Nippon Emulsion Co., Ltd., trade name "EMALEX GWIS-303"). b-9: Polyoxyethylene glyceryl triisostearate (a compound in formula (4) where p is 10, manufactured by Nippon Emulsion Co., Ltd., trade name "EMALEX GWIS-310"). b-10: Polyoxyethylene glyceryl triisostearate (a compound in formula (4) where p is 15, manufactured by Nippon Emulsion Co., Ltd., trade name "EMALEX GWIS-315"). b-11: Polyoxyethylene glyceryl triisostearate (a compound in formula (4) where p is 20, manufactured by Nippon Emulsion Co., Ltd., trade name "EMALEX GWIS-320"). ·b-12: Polyoxyethylene alkyl ether (In formula (5), R 3 is an alkyl group having 10 carbon atoms, S A compound with a ratio of 3, manufactured by BASF, trade name "Lutensol XP30". ·b-13: Polyoxyethylene alkyl ether (in formula (5), R 3 is an alkyl group having 10 carbon atoms, S A compound with a coefficient of 4, manufactured by BASF, trade name "Lutensol XP40". ·b-14: Polyoxyethylene alkyl ether (in formula (5), R 3 is an alkyl group having 10 carbon atoms, S A compound with a coefficient of 5, manufactured by BASF, trade name "Lutensol XP50". ·b-15: Polyoxyethylene alkyl ether (in formula (5), R 3 is an alkyl group having 13 carbon atoms, S A compound with a ratio of 3, manufactured by BASF, trade name "Lutensol TO3". b-16: Poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer (compound shown by formula (6), HLB=7.0, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-6012"). b-17: Polyoxyethylene methylpolysiloxane copolymer (compound shown in formula (6), HLB=4.5, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-6017"). b-18: Polyether-modified organopolysiloxane (compound represented by formula (6), HLB: 4, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KF-6020").

[0127] <(C) component> ·c-1: Water (purified water).

[0128] <(D) component> d-1: Sodium linear alkylbenzene sulfonate (compound represented by formula (7), manufactured by Lion Specialty Chemicals, trade name "Lypon LS-250"). ·d-2: Polyoxyethylene alkyl (C12-14) ether sodium sulfate (in formula (8), R 7 (A compound in which C1 is an alkyl group with 12 to 14 carbon atoms, and v is 1). ·d-3: Sodium polyoxyethylene lauryl ether sulfate (in formula (8), R 7 A compound in which is an alkyl group having 12 to 14 carbon atoms, and v is 2 (manufactured by Shin Nippon Rika Co., Ltd., product name "Sinoline SPE-1250"). d-4: Tristyrenated phenol ethoxylate (a compound in formula (11) where n is 9 (EO: 9 mol), manufactured by Toho Chemical Industry Co., Ltd., trade name "T-10"). • d-5: Tristyrenated phenol ethoxylate (a compound in formula (11) where n is 18 (EO: 18 mol), manufactured by Toho Chemical Industry Co., Ltd., trade name "T-20"). d-6: Tristyrenated phenol ethoxylate (a compound in formula (11) where n is 24 (EO: 24 mol), manufactured by Toho Chemical Industry Co., Ltd., trade name "T-26"). • d-7: Polyethylene glycol / dimethyl terephthalate polymer (a compound with an average molecular weight of 2000-3000, manufactured by Clariant, trade name "TexCare SRN170C") d-8: Polyethylene glycol / dimethyl terephthalate polymer (a compound with an average molecular weight of 6200, manufactured by Clariant, trade name "TexCare SRN240").

[0129] <(E) component> e-1: Diethylene glycol monobutyl ether (Fujifilm Wako Pure Chemical Industries).

[0130] <Common ingredients> Each example of a dry cleaning detergent composition contains the following common components. The type of common component in the following composition is designated as "A," and if each example of a dry cleaning detergent composition contains the following common component, "A" is written in the "Common Component" column of Tables 1 to 7. Sodium benzoate (manufactured by Toagosei Co., Ltd., product name "Sodium Benzoate")...0.5% by mass. • Citric acid (manufactured by Iwata Chemical Co., Ltd., product name "Anhydrous Citric Acid")... 0.1% by mass. • Chelating agent (BASF, product name "Trilon M Liquid JP")...0.3% by mass. • Fragrance ("Fragrance Composition A" as described in Japanese Patent Publication No. 2002-146399) ... 0.7% by mass. • Preservative 1:1,2-Benzisothiazolin-3-one (BIT) (manufactured by THOR, product name "ACTICIDE B20")...0.04% by mass. • Preservative 2: A mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one (a mixture of approximately 77% by mass of the former and approximately 23% by mass of the latter) (manufactured by Dow Chemical, trade name "Caisson CG-ICP")... 0.01% by mass.

[0131] [Table 1]

[0132] [Table 2]

[0133] [Table 3]

[0134] [Table 4]

[0135] [Table 5]

[0136] [Table 6]

[0137] [Table 7]

[0138] (Examples 1-48, Comparative Examples 1-12) Using the dry cleaning detergent compositions of Formulation Examples 1 to 60 shown in Tables 1 to 7, dry cleaning solutions of Examples 1 to 48 and Comparative Examples 1 to 12 were prepared by the following method to evaluate their cleaning performance, and CO2 dry cleaning was performed using liquid carbon dioxide as the cleaning medium. In Tables 5 to 7, the "B / A" column in the "Ratio" column indicates the ratio of the mass of component (B) to the mass of component (A) ((B) / (A)). Also, in Tables 5 to 7, the "(A+B) / D" column in the "Ratio" column indicates the ratio of the total mass of components (A) and (B) to the mass of component (D) (((A)+(B)) / (D)). Furthermore, in Tables 5 to 7, the "(A+B+C) / E" column in the "Ratio" column indicates the ratio of the total mass of components (A), (B), and (C) to the mass of component (E) (((A)+(B)+(C)) / (E)).

[0139] First, 360 ml each of the dry cleaning detergent compositions from formulation examples 1 to 60 was added to a dry cleaning device (hereinafter referred to as the "liquid carbon dioxide washing machine") for CO2 dry cleaning. The liquid carbon dioxide washing machine used was the "NEXUS ver2" manufactured by Tersus Solutions. Next, the liquid carbon dioxide washing machine was loaded with the following items: a soiled cloth for evaluating washing performance or clothing for evaluating decolorization, and clothing to adjust the mass of the items to be washed, so that the total mass was 3 kg.

[0140] Next, 90 L of liquid carbon dioxide was added to the liquid carbon dioxide washing machine under conditions of a pressure of 5.5 MPa and a temperature of 15°C. Then, the washing machine was used for 4 minutes of washing followed by 2 minutes of rinsing. Specifically, by adding 90 L of liquid carbon dioxide to the liquid carbon dioxide washing machine as described above, the liquid carbon dioxide and the dry cleaning detergent composition were mixed, and a dry cleaning solution was prepared within the liquid carbon dioxide washing machine. The garments were then washed for 4 minutes using this prepared dry cleaning solution. After 4 minutes of washing, the dry cleaning solution was discharged from the processing tank (washing tank) of the liquid carbon dioxide washing machine. Then, 90 L of liquid carbon dioxide for rinsing was added to the liquid carbon dioxide washing machine, and the garments were rinsed for 2 minutes using only the rinsing liquid carbon dioxide. Tables 8 to 11 show the concentrations (%owf) of components (A), (B), and (C) relative to the garments in the dry cleaning solutions prepared using the dry cleaning detergent compositions of Formulation Examples 1 to 37. In Tables 8 to 11, the "Composition" column corresponds to compositions 1 to 37 of the dry cleaning detergent compositions used to prepare the dry cleaning solutions. Tables 12 to 14 show the concentrations (%owf) of components (A), (B), (C), (D), and (E) relative to the material being cleaned in the dry cleaning solutions prepared using the dry cleaning detergent compositions of formulation examples 38 to 60. In Tables 12 to 14, the "Composition" column corresponds to compositions 38 to 60 of the dry cleaning detergent compositions used to prepare the dry cleaning solutions. Hereinafter, the concentrations (%owf) of components (A), (B), (C), (D), and (E) relative to the material being cleaned will also be simply referred to as the "concentration" of each component.

[0141] The cleaning performance and odor of CO2 dry cleaning performed using the dry cleaning solutions of Examples 1-25 and Comparative Examples 1-12 were evaluated using the following method. The evaluation results are shown in Tables 8-11. Furthermore, the cleaning performance, color transfer, decolorization, and odor of CO2 dry cleaning performed using the dry cleaning solutions of Examples 26 to 48 were evaluated using the following method. The evaluation results are shown in Tables 12 to 14.

[0142] <Cleaning performance> (Evaluation fabric) The following soiled cloths for evaluating cleaning performance were used as evaluation cloths.

[0143] (Cleaning cloth for evaluating cleaning performance) • Sebum stain: Swissatest brand, product name "EMPA108 sebum". • Carbon stain: Made by Swissatest, product name "EMPA108 carbon". • Bloodstain: Swissatest brand, product name "EMPA108 blood". • Cocoa stain: Made by Swissatest, product name "EMPA108 cocoa". • Wine stain: Made by Swissatest, product name "EMPA108 wine".

[0144] (Clothing for evaluating decolorization and color transfer properties) [Colored clothing] • Merino crew neck sweater (wool), product name "Red, Green, Blue, Black (made by Uniqlo)". • Holgerment Merino Wool (Wool), product name "Mint (made by Laurel)". • Slim-fit jeans (denim), product name "Black (made by Uniqlo)". [White clothing] • T-shirt (cotton) (manufactured by Fuji Spinning Holdings Co., Ltd.). • T-shirt (polyester) (made by Uniqlo).

[0145] <Method for evaluating cleaning performance> The Y-value (surface reflectance) was measured using a spectrophotometer (SE7700, manufactured by Nippon Denshoku Co., Ltd.; 800V, manufactured by Datacolor Co., Ltd.) for soiled cloth before CO2 dry cleaning, soiled cloth after CO2 dry cleaning using the method described above, and unsoiled cloth as shown below. The unsoiled cloth was the original white cloth (raw fabric) without any dirt adhering to it, and for this evaluation, "EMPA110 white," manufactured by Swissatest, was used. Hereinafter, soiled cloth before CO2 dry cleaning will be referred to as "soiled cloth before cleaning," and soiled cloth after CO2 dry cleaning will be referred to as "soiled cloth after cleaning."

[0146] From the Y values ​​(surface reflectance) of the soiled cloth before cleaning, the soiled cloth after cleaning, and the unsoiled cloth obtained from the above measurements, the cleaning rate (%) of the dry cleaning solutions for Examples 1 to 48 and Comparative Examples 1 to 12 was determined using the following formula (9). The X value in formula (9) was calculated using the value obtained from the following formula (10). Cleaning rate (%) = (X value of soiled cloth before cleaning - X value of soiled cloth after cleaning) ÷ (X value of soiled cloth before cleaning - X value of unsoiled cloth) × 100 (9) X value = {1 - (Y value ÷ 100)} 2 ÷{2 × (Y value ÷ 100)} (10)

[0147] For each example and comparative example, CO2 dry cleaning was performed on three soiled cloths using the respective dry cleaning solutions, and the average cleaning rate (%) was calculated. The calculated average value was evaluated according to the following criteria. (Judgment criteria) A: Cleaning rate of 25% or more. B: Cleaning rate is 18% or more, but less than 25%. C: Cleaning rate is 15% or more, but less than 18%. D: Cleaning rate is greater than 10% but less than 15%. E: Cleaning rate is 10% or less.

[0148] <Unusual Odor: Odor Evaluation Method> Using the CO2 dry cleaning method described above, soiled cloths for evaluating cleaning performance, garments for evaluating decolorization properties, and garments for mass matching were touched with bare hands, and the odor of the hands was evaluated sensorily according to the following criteria. (Judgment criteria) A: If no odor is detected even when the distance to clothing or bare hands is less than 1 cm, then no odor is detected at all. B: A slight odor is detected if the odor is noticeable when the clothing or bare hands are less than 1 cm away, but not when the distance is 3 cm or more. C: If you can smell an odor when the clothing or your bare hands are less than 3 cm away, but not when you are 5 cm or more away, then you can smell an odor. D: If you can detect an unpleasant odor even when your clothing or bare hands are more than 5 cm away, you easily detect unpleasant odors.

[0149] <Decolorization and stain transfer washing method> First, 360 ml of each of the dry cleaning detergent compositions from formulation examples 38-60 was added to a liquid carbon dioxide washing machine, similar to the one used for evaluating cleaning performance. Next, a total of 3 kg of colored denim and wool garments, along with white garments, as shown in the garments used for evaluating decolorization and color transfer, was added to the liquid carbon dioxide washing machine. Next, 90 liters of liquid carbon dioxide were added to the liquid carbon dioxide washing machine under conditions of a pressure of 5.5 MPa and a temperature of 15°C. Then, using the same method as for evaluating washing performance, the liquid carbon dioxide washing machine was used for a 4-minute wash cycle followed by a 2-minute rinse cycle. Subsequently, the garments used for evaluating decolorization and color transfer were removed under normal pressure and temperature conditions, and the decolorization and color transfer were evaluated based on the following evaluation criteria. The results are shown in Tables 12 to 14.

[0150] <Decolorization and Dye Transfer Evaluation Method> The garments used for evaluating decolorization and color transfer before washing, and the garments used for evaluation after washing, were measured using a spectrophotometer (product name "SE7700" manufactured by Nippon Denshoku Co., Ltd.), and the color change was determined using the following formula (18). Color change (ΔE) = ((a value of the evaluation garment before washing - a value of the evaluation garment after washing)) 2 +(b value of evaluation garment before washing - b value of evaluation garment after washing)2 +(L value of the evaluation garment before washing - L value of the evaluation garment after washing) 2 ) 1 / 2 (18) Here, in equation (18), the L value represents the brightness (lightness) of the color, and is the L* value of lightness in the CIE 1976 L*a*b* (CIELAB) color system according to the SCE method. The a and b values ​​represent the intensity of the hue, and are the a* and b* values ​​in the same CIE 1976 L*a*b* (CIELAB) color system.

[0151] (Criteria for determining decolorization) [denim] A: Color shift (ΔE) is less than 0.5. B: Color shift (ΔE) is 0.5 or greater, and less than 0.8. C: Color shift (ΔE) is 0.8 or greater and less than 1.0. D: Color shift (ΔE) is 1.0 or greater. [wool] A: Color shift (ΔE) is less than 0.4. B: Color shift (ΔE) is 0.4 or greater, and less than 0.5. C: Color shift (ΔE) is 0.5 or greater, and less than 0.6. D: Color shift (ΔE) is 0.6 or higher.

[0152] (Criteria for determining transfusion) [Color transfer from denim to cotton] A: Color shift (ΔE) is less than 0.4. B: Color shift (ΔE) is 0.4 or greater, and less than 0.6. C: Color shift (ΔE) is 0.6 or greater, and less than 0.8. D: Color shift (ΔE) is 0.8 or higher. [Color transfer from wool to polyester] A: Color shift (ΔE) is less than 0.8. B: Color shift (ΔE) is 0.8 or greater and less than 1.2. C: Color shift (ΔE) is 1.2 or greater, and less than 1.4. D: Color shift (ΔE) is 1.4 or higher. [Color transfer from wool to cotton or polyester] A: Color shift (ΔE) is less than 0.4. B: Color shift (ΔE) is 0.4 or greater, and less than 0.6. C: Color shift (ΔE) is 0.6 or greater, and less than 0.8. D: Color shift (ΔE) is 0.8 or higher.

[0153] <Method for evaluating undissolved residue> From the perspective of solubility in dry cleaning solvents, the amount and ratio of each component can reduce their solubility and dispersibility in the dry cleaning solvent, resulting in undissolved residue (localized adhesion to clothing). The soiled cloths used for evaluating cleaning performance and the garments used for evaluating decolorization and color transfer, which were treated according to the above cleaning method, were observed visually and tactilely and evaluated according to the following criteria. The results are shown in Tables 12 to 14.

[0154] (Criteria for determining undissolved residue) A: The entire fabric is dry. B: Does not fall under evaluations C or D, satisfies at least one of the following conditions: residue is observed on less than 10% of the evaluation fabric area, and dampness is felt when touching less than 10% of the evaluation fabric area. C: Does not fall under evaluation D, satisfies at least one of the following conditions: undissolved residue is observed on 10% or more of the evaluation fabric area, and moisture is felt when touching 10% or more of the evaluation fabric area. D: At least one of the following conditions is met: undissolved residue is observed on 30% or more of the evaluation fabric, and moisture is felt when touching 30% or more of the evaluation fabric.

[0155] <Overall Rating> A product was deemed acceptable if its cleaning performance was rated A to D, and its odor, discoloration, color transfer, and undissolved residue ratings were A to C. Any product that did not meet these criteria was deemed unacceptable.

[0156] [Table 8]

[0157]

Table 9

[0158]

Table 10

[0159]

Table 11

[0160]

Table 12

[0161]

Table 13

[0162]

Table 14

[0163] <Result> As shown in Tables 8 to 11, the cleaning liquids for dry cleaning in Examples 1 to 25 showed good results in both the evaluation of cleaning performance and off-odor. On the other hand, the cleaning liquids for dry cleaning in Comparative Examples 1 to 2 that did not contain component (B) failed the evaluation of cleaning performance. Also, like the cleaning liquids for dry cleaning in Comparative Examples 3 to 4, even when component (B) was not contained, the cleaning performance was improved by increasing the concentration of component (A), but the evaluation of off-odor failed. The cleaning liquid for dry cleaning in Comparative Example 5 that did not contain component (A) failed the evaluation of cleaning performance. The cleaning liquid for dry cleaning in Comparative Example 6 that did not contain component (C) failed the evaluation of cleaning performance. Furthermore, the dry cleaning solution of Comparative Example 7, which had too low a concentration of component (C), and the dry cleaning solution of Comparative Example 8, which had too high a concentration of component (C), failed to meet the evaluation of their cleaning performance. Furthermore, the dry cleaning solution in Comparative Example 9, which had too low a concentration of component (A), failed the evaluation of its cleaning performance. On the other hand, the dry cleaning solution in Comparative Example 10, which had too high a concentration of component (A), failed the odor evaluation. Furthermore, the dry cleaning solutions in Comparative Examples 11 and 12, in which the concentration of component (B) was less than 0.12% owf or greater than 7.8% owf, failed to meet the evaluation criteria for cleaning performance.

[0164] As shown in Tables 12 to 14, the dry cleaning solutions of Examples 26 to 48 contained both component (D) and component (E), and it was found that good results were obtained in decolorization / transfer evaluation and undissolved residue evaluation when these components were included at specific concentrations. In particular, as shown in Tables 12 to 14, particularly good results were obtained in decolorization / transfer evaluation and undissolved residue evaluation when the ratios of each component, "B / A", "(A+B) / D", and "(A+B+C) / E", were within specific numerical ranges. In particular, the dry cleaning solution of Example 26 had a concentration of component (D) in the range of 0.01 to 0.6% owf, a concentration of component (E) in the range of 0.7 to 10.8% owf, a ratio of "B / A" of 5 or more, a ratio of "(A+B) / D" in the range of 1.7 to 50, and a ratio of "(A+B+C) / E" in the range of 0.1 to 10, and extremely good results were obtained in all evaluations.

[0165] (Example 49) In Example 49, the cleaning performance was evaluated using the dry cleaning agent composition of Formulation Example 1 shown in Table 1, with a petroleum-based solvent as the dry cleaning solvent, using the following method. The results are shown in Table 15. Decane was used as the petroleum-based solvent.

[0166] Using a shaker (product name "Shaker SA300", manufactured by Yamato Scientific Co., Ltd.), 0.4 g of the dry cleaning detergent composition of Formulation Example 1 was added to 100 mL of dry cleaning solvent. Next, the soiled cloth for evaluating cleaning performance or the garment for evaluating decolorization, along with the garment to adjust the mass of the items to be washed, were added so that the total mass was 3.33 kg. The soiled cloth for evaluating cleaning performance was cut as needed. The mixture was shaken vertically at a speed of 250 rpm at 20°C for 10 minutes. After collecting the cloth, it was dried with an iron (steam iron NI-SF30) at a medium temperature (wool) for 15 seconds per cloth. The cleaning performance of the dried soiled cloth was evaluated using the same criteria as those for the above-described cleaning performance evaluation method.

[0167] (Example 50) In Example 50, the cleaning performance was evaluated using the same method as in Example 49, except that a chlorine-based solvent was used as the dry cleaning solvent, with the dry cleaning detergent composition of Formulation Example 1 shown in Table 1. The results are shown in Table 15. Tetrachloroethylene (Merck) was used as the chlorine-based solvent.

[0168] (Example 51) In Example 51, the cleaning performance was evaluated in the same manner as in Example 49, except that a fluorine-based solvent was used as the dry cleaning solvent, using the dry cleaning detergent composition of Formulation Example 1 shown in Table 1. The results are shown in Table 15. The fluorine-based solvent used was HCFC-225 (manufactured by AGC Inc.).

[0169] (Example 52) In Example 52, the cleaning performance was evaluated in the same manner as in Example 49, except that a silicone-based solvent was used as the dry cleaning solvent, using the dry cleaning detergent composition of Formulation Example 1 shown in Table 1. The results are shown in Table 15. The silicone-based solvent used was a cyclic organopolysiloxane (Merck). Table 15 shows the concentrations (%owf) of components (A), (B), and (C) relative to the material being cleaned in each dry cleaning solution prepared using the dry cleaning detergent composition of Formulation Example 1 in Examples 49 to 52.

[0170] [Table 15]

[0171] As shown in Table 15, the dry cleaning solutions of Examples 49 to 52 showed good results in the evaluation of cleaning performance, regardless of whether a petroleum-based solvent, chlorine-based solvent, fluorine-based solvent, or silicone-based solvent was used as the dry cleaning solvent.

Claims

1. (A) Components: Hydrogen peroxide and (B) Component: At least one nonionic surfactant selected from the group consisting of polyoxyethylene-polyoxypropylene alkyl ether, polyoxyethylene glyceryl triisostearate, polyoxyethylene alkyl ether, and polyether-modified silicone, (C) Ingredients: Water and A dry cleaning solvent is included, In washing items to be washed, The concentration of component (A) relative to the object to be washed is 0.01 to 0.72% owf, expressed as a percentage of the ratio of the volume a (ml) of component (A) to the mass w (g) of the object to be washed (= a / w × 100%). The concentration of component (B) relative to the object to be washed is 0.12 to 7.8% owf, expressed as a percentage of the ratio of the volume b (ml) of component (B) to the mass w (g) of the object to be washed (= b / w × 100%). A cleaning solution for dry cleaning, wherein the concentration of component (C) relative to the object to be cleaned is 0.3 to 10.8% owf, expressed as a percentage of the ratio of the volume c (ml) of component (C) to the mass w (g) of the object to be cleaned (= c / w × 100%).

2. The concentration of component (A) relative to the item being washed is 0.06 to 0.6% owf. The concentration of component (B) relative to the item being washed is 0.6 to 6% owf. The cleaning solution for dry cleaning according to claim 1, wherein the concentration of component (C) relative to the item to be washed is 1.5 to 9% owf.

3. The cleaning solution for dry cleaning according to claim 1 or 2, wherein the component (B) is a nonionic surfactant represented by the following formula (1). 【Chemistry 1】 (In equation (1), x is [CH ２ CH ２ O represents the average number of repetitions, ranging from 5 to 15, and y is [CH ２ CH (CH ３ The average number of repetitions of )O] is 2.5 to 18, and n and m are respectively (CH ２ This number represents the average number of repetitions, and the sum of n and m is between 9 and 11.

4. (D) Component: At least one selected from the group consisting of anionic surfactants, tristyrene-modified phenol ethoxylates, and water-soluble polymer compounds having alkylene terephthalate units and / or alkylene isophthalate units and oxyalkylene units and / or polyoxyalkylene units, (E) component: further comprising diethylene glycol monobutyl ether as a non-aqueous solvent, The concentration of component (D) relative to the object to be washed is 0.01 to 0.6% owf, expressed as a percentage of the ratio of the volume d (ml) of component (D) to the mass w (g) of the object to be washed (= d / w × 100%). The cleaning solution for dry cleaning according to claim 1 or 2, wherein the concentration of component (E) relative to the object to be washed is 0.7 to 10.8% owf, expressed as a percentage of the ratio of the volume e (ml) of component (E) to the mass w (g) of the object to be washed (= e / w × 100%).

5. The (D) component contains at least one selected from the group consisting of linear alkylbenzene sulfonic acid, polyoxyethylene alkyl ether sodium sulfate, and a water-soluble polymer having alkylene terephthalate units and / or alkylene isophthalate units and oxyalkylene units and / or polyoxyalkylene units, in a concentration of 0.01 to 0.6% owf relative to the mass w (g) of the object to be washed, and The cleaning solution for dry cleaning according to claim 4, wherein the (E) component contains diethylene glycol monobutyl ether at a concentration of 0.7 to 10.8% owf relative to the mass w (g) of the item to be cleaned.

6. The dry cleaning solution according to claim 1 or 2, wherein the dry cleaning solvent is liquid carbon dioxide.

7. A cleaning agent composition for dry cleaning used in dry cleaning using a dry cleaning solvent, (A) Components: Hydrogen peroxide and (B) Component: At least one nonionic surfactant selected from the group consisting of polyoxyethylene-polyoxypropylene alkyl ether, polyoxyethylene glyceryl triisostearate, polyoxyethylene alkyl ether, and polyether-modified silicone, (C) Ingredients: Contains water, The content of component (A) in the dry cleaning detergent composition is 0.083 to 6% by mass. The content of component (B) in the dry cleaning detergent composition is 1 to 62.5% by mass. A dry cleaning detergent composition wherein the content of component (C) in the dry cleaning detergent composition is 2.5 to 90% by mass.

8. (D) component: at least one selected from the group consisting of anionic surfactants, tristyrene-modified phenol ethoxylates, and water-soluble polymer compounds having alkylene terephthalate units and / or alkylene isophthalate units and oxyalkylene units and / or polyoxyalkylene units, and (E) component: diethylene glycol monobutyl ether as a non-aqueous solvent, The content of component (D) in the dry cleaning detergent composition is 0.1 to 5% by mass. The dry cleaning detergent composition according to claim 7, wherein the content of component (E) in the dry cleaning detergent composition is 5 to 90% by mass.

9. The dry cleaning detergent composition according to claim 7 or 8, which is used in dry cleaning using liquid carbon dioxide as the dry cleaning solvent.

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