Composition for cleaning of vapor

Abstract

To provide a solvent composition for cleaning excellent in washability and capable of suppressing damage to a substrate even when the composition is used for a cleaning process including cleaning of vapor.SOLUTION: The present invention relates to a composition for cleaning of vapor and includes (A) hydrofluoroolefin, (B) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (C) one kind or more of compounds selected from the group consisting of methyl nonafluorobutyl ether and methyl nonafluoroisobutyl ether, and (D) a hydrocarbon, wherein when a total of components (A), (B), and (C) is 100 pts.wt., component (A) is more than 0 pt.wt. and less than 50 pts.wt., and when the total of components (B) and (C) is 100 pts.wt., component (B) is more than 0 pt.wt. and less than or equal to 85 pts.wt., and when the total of components (A), (B), (C), and (D) is 100 pts.wt., the total of components (A) and (D) is 40 pts.wt. or more and less than 100 pts.wt..SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to steam cleaning compositions. [Background technology]

[0002] Hydrofluoroolefins, such as cis-1-chloro-3,3,3-trifluoropropene, are used as industrial cleaning agents with excellent degreasing properties, but there are concerns that they may attack resins with low solvent resistance, such as polycarbonate, causing discoloration, deformation, or dissolution of the resin. Hydrofluoroethers, such as HFE-347pc-f, are excellent in terms of low corrosion (low damage) to resins and thermal stability, and are often used in the industrial cleaning field for finishing cleaning in the cleaning process. Hydrocarbons also have high degreasing properties, and industrial cleaning using them is also widely used.

[0003] As an example of a cleaning agent using these components, Patent Document 1 describes a cleaning agent composition that contains (A) cis-1-chloro-3,3,3-trifluoropropene, (B) one or more compounds selected from the group consisting of chlorine-atom-free hydrofluoroolefins, hydrofluorocarbons, and hydrofluoroethers, and (C) a hydrocarbon solvent, in which the mass ratio of (A) to (B) is 11:89 to 99:1.

[0004] In the industrial cleaning field, resin molded products are one of the objects to be cleaned, and many of them have complex structures such as small holes. When cleaning resin molded products with such complex structures, not only degreasing is required, but also low corrosion resistance to the resin and complete drying even to the small holes is required. When complete drying is required, steam cleaning may be used. This is often used as a finishing cleaning to achieve high cleaning performance, but as an additional effect, the heat supplied by heating the object with solvent vapor promotes the evaporation of the cleaning agent attached to the object, thereby further improving drying.

[0005] Patent Document 2 describes a cleaning solvent composition used in a cleaning method including a vapor contact step of contacting an object to be cleaned with vapor of the cleaning solvent composition, the cleaning solvent composition including (A) cis-1-chloro-3,3,3-trifluoropropene and (B) a hydrofluoroether that exhibits pseudo-azeotropy when mixed with component (A), in which (A) is 8 parts by weight or more and less than 30 parts by weight when the total of components (A) and (B) is 100 parts by weight. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2022-98039 [Patent Document 2] Patent Publication No. 2022-93150 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the cleaning composition described in Patent Document 1 is intended for immersion cleaning or aerosol spray cleaning, and is not used for steam cleaning. According to the findings of the inventors, when the cleaning composition described in Patent Document 1 is used for steam cleaning, the component composition of the cleaning agent contained in the steam is likely to change, and there is a problem that the cleaning agent vapor corrodes resins with low solvent resistance, such as polycarbonate. In addition, it was found that there is room for further improvement in the cleaning solvent composition described in Patent Document 2.

[0008] Therefore, an object of the present invention is to provide a cleaning solvent composition which has excellent cleaning properties and is capable of suppressing damage to substrates even when used in a cleaning process including steam cleaning.

[0009] The present invention has the following configuration. [1] (A) a hydrofluoroolefin; (B) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether; (C) one or more compounds selected from the group consisting of methyl nonafluorobutyl ether and methyl nonafluoroisobutyl ether; and (D) a hydrocarbon; When the total amount of the components (A), (B) and (C) is 100 parts by weight, the amount of the component (A) is more than 0 parts by weight and less than 50 parts by weight, the amount of the component (B) is more than 0 parts by weight and 85 parts by weight or less when the total amount of the components (B) and (C) is 100 parts by weight, A steam cleaning composition used for cleaning including a step of generating steam, wherein the total amount of the components (A) and (D) is 40 parts by weight or more and less than 100 parts by weight, when the total amount of the components (A), (B), (C) and (D) is 100 parts by weight. 2. The steam cleaning composition of claim 1, wherein component (A) is cis-1-chloro-3,3,3-trifluoropropene. [3] The steam cleaning composition according to [1] or [2], wherein component (D) is at least one compound selected from the group consisting of isohexane, isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane, decane, and dodecane. [4] The steam cleaning composition according to any one of [1] to [3], wherein the total amount of the components (A), (B), (C) and (D) is 85 parts by weight or more and 100 parts by weight or less, based on 100 parts by weight of the entire composition. Effect of the Invention

[0010] The present invention provides a cleaning solvent composition which has excellent cleaning properties and is less likely to damage substrates even when used in a cleaning process including steam cleaning. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic diagram of a cleaning system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (Definition of terms) "(A) Hydrofluoroolefin" may be referred to as "(A)" or "(A) component." The same applies to other components. Regarding numerical ranges, "to" means that both ends of the range are included. That is, "85 to 100 parts by weight" means "85 parts by weight or more and 100 parts by weight or less." Additionally, "or less" means "the same as or less than," and "or more" means "the same as or greater than."

[0013] [Steam cleaning composition] The steam cleaning composition includes (A) a hydrofluoroolefin, (B) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (C) one or more compounds selected from the group consisting of methyl nonafluorobutyl ether and methyl nonafluoroisobutyl ether, and (D) a hydrocarbon. In the steam cleaning composition, when the total of the components (A), (B), and (C) is 100 parts by weight, the amount of the component (A) is more than 0 parts by weight and less than 50 parts by weight. In the steam cleaning composition, when the total of the components (B) and (C) is 100 parts by weight, the amount of the component (B) is more than 0 parts by weight and not more than 85 parts by weight. In the steam cleaning composition, when the total of the components (A), (B), (C), and (D) is 100 parts by weight, the amount of the components (A) and (D) is 40 parts by weight or more and less than 100 parts by weight. The steam cleaning composition is used for cleaning including a step of generating steam.

[0014] The inventors have discovered that a steam cleaning composition containing component (B) and component (C) in a specific content ratio has excellent cleaning properties and reduces damage to the resin substrate even when used as a cleaning agent for steam cleaning.

[0015] [(A) Hydrofluoroolefin] (A) The hydrofluoroolefin is a fluoroolefin compound that contains hydrogen atoms, carbon atoms, and fluorine atoms, and may further contain one or more atoms selected from the group consisting of chlorine atoms and bromine atoms. The component (A) may be cis-1-chloro-3,3,3-trifluoropropene ((Z)-1-chloro-2,3,3-trifluoro-1-propene, HCFO-1233zd(Z), HFO-1233zd(Z)), (E)-1-chloro-2,3,3-trifluoropropene ((E)-1-chloro-2,3,3-trifluoro-1-propene, HCFO-1233yd(E)), (Z)-1-chloro-2,3,3-trifluoropropene ((Z)-1-chloro-2,3,3-trifluoro-1-propene, HCFO-1233yd(Z)), 2-bromo-3,3,3-trifluoro-1-propene, 1,1-dichloro-3,3,3-trifluoropropene ( HCFO-1223za), (Z)-1,2-dichloro-3,3,3-trifluoropropene (HCFO-1223xd(Z)), (E)-1,2-dichloro-3,3,3-trifluoropropene (HCFO-1223xd(E)), 1-chloro-1,3,3-trifluoropropene, (Z)-1-chloro-2,3,3,4,4,5,5-heptafluoro-1-pentene (HCFO-1437dycc(Z)), (E)-1-chloro-2,3,3,4,4,5,5-heptafluoro-1-pentene (HCFO-1437dycc(E)), (Z)-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz(Z)), and the like.

[0016] Commercially available products of the component (A) include CELEFIN (registered trademark) 1233Z (manufactured by Central Glass Co., Ltd.) (HCFO-1233zd(Z), HFO-1233zd(Z)), AMOLEA (registered trademark) AS-300 (manufactured by AGC Corporation) (a mixture of (E)-1-chloro-2,3,3-trifluoropropene (HCFO-1233yd(E)), (Z)-1-chloro-2,3,3-trifluoropropene (HCFO-1233yd(Z)) and a stabilizer)).

[0017] The component (A) is preferably cis-1-chloro-3,3,3-trifluoropropene ((Z)-1-chloro-2,3,3-trifluoro-1-propene, HCFO-1233zd(Z), HFO-1233zd(Z)), (E)-1-chloro-2,3,3-trifluoropropene ((E)-1-chloro-2,3,3-trifluoro-1-propene, HCFO-1233yd(E)), or (Z)-1-chloro-2,3,3-trifluoropropene ((Z)-1-chloro-2,3,3-trifluoro-1-propene, HCFO-1233yd(Z)), and particularly preferably cis-1-chloro-3,3,3-trifluoropropene ((Z)-1-chloro-2,3,3-trifluoro-1-propene, HCFO-1233zd(Z). The component (A) may be one type of component or a combination of two or more types of components.

[0018] [(B) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether] Component (B) is 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether. Component (B) has a boiling point of 56°C and is also known as 1,1,2,2-tetrafluoro-1-(2,2,2-trifluoroethoxy)ethane or HFE-347pc-f.

[0019] An example of a commercially available product of component (B) is Asahiklin AE-3000 (manufactured by AGC Corporation).

[0020] [(C) One or more compounds selected from the group consisting of methyl nonafluorobutyl ether and methyl nonafluoroisobutyl ether] Component (C) is one or more compounds selected from the group consisting of methyl nonafluorobutyl ether and methyl nonafluoroisobutyl ether. Commercially available products of component (C) include Novec(TM) 7100; 3M(TM) Novec(TM) 7100 High Performance Fluid (manufactured by 3M Japan Ltd.). The component (C) may be one type of component or a combination of two or more types of components.

[0021] [(D) Hydrocarbons] The component (D) is a hydrocarbon solvent that is composed of only carbon and hydrogen atoms, may be linear or branched, may be cyclic or acyclic, and may have a carbon-carbon double bond. The component (D) is a component that improves the cleaning properties of oils such as silicone oil. Examples of the component (D) include aliphatic hydrocarbons such as hexane, isohexane, cyclohexane, normal heptane, isoheptane, cycloheptane, normal octane, isooctane, nonane, isononane, decane, methylcyclohexane, ethylcyclohexane, limonene, 2-methyl-2-butene, 2-methyl-1-pentene, 2-methyl-2-pentene, 3-ethyl-2-butene, 2,3-dimethyl-2-butene, 2,4,4-trimethyl-1-pentene, 2,4,4-trimethyl-2-pentene, 2,2,4,6,6-pentamethylheptane, isododecane, isoparaffins, and naphthenes; and aromatic hydrocarbons such as toluene. Component (D) may be synthetic.

[0022] From the viewpoint of low toxicity, the component (D) is preferably an aliphatic hydrocarbon. From the viewpoint of flash point, the component (D) is preferably at least one compound selected from the group consisting of isohexane, isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane, decane, and dodecane. From the viewpoint of flash point, the component (D) is more preferably at least one compound selected from the group consisting of isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane, decane, and dodecane, and from the viewpoint of drying property, it is particularly preferably isooctane and / or methylcyclohexane. The component (D) may be one type of component or a combination of two or more types of components.

[0023] <Ingredients other than components (A) to (D)> The steam cleaning composition may contain components other than the components (A), (B), (C) and (D) to the extent that the effects of the present invention are not impaired. Examples of such components other than the components (A) to (D) include an additional component (E) and an additive (F).

[0024] <<(E) Further Ingredients>> (E) Additional components include (e1) nitro compounds, (e2) ethers, (e3) esters (excluding (e2) ethers), (e4) alcohols (excluding (e2) ethers), (e5) amide compounds, (e6) chloroolefins, (e7) hydrobromocarbons, (e8) hydrofluorocarbons, (e9) hydrofluoroethers (excluding components (B) and (C)) and (e10) chlorinated hydrocarbons (excluding (e6) chloroolefins and components (A)).

[0025] <(e1) Nitro compounds> The (e1) nitro compound is not particularly limited as long as it has one or more nitro groups in the molecule. Examples of the (e1) component include nitroalkanes such as nitromethane, nitroethane, 1-nitropropane, and 2-nitropropane.

[0026] <(e2) Ether> The (e2) ether is an ether-based solvent that contains carbon atoms, hydrogen atoms, and an ether bond (-o-), and may be linear or branched, and may be cyclic or acyclic. The (e2) component includes glycols. Specific examples of the component (e2) include dipropyl ether, diisopropyl ether, tetrahydrofuran, methyltetrahydrofuran, 4-methyltetrahydropyran, 1,4-dioxane, 1,3-dioxolane, diethyl ether, diisobutyl ether, dibutyl ether, methyl tertiary butyl ether, methyl cellosolve, ethyl cellosolve, isopropyl cellosolve, 1,2-butylene oxide, epichlorohydrin, propylene oxide, cyclohexene oxide, cyclopentene oxide, pentene oxide, heptene oxide, octene oxide, alkyl glycidyl ether, alkyl glycidyl ester, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, diethylene glycol monoethyl ether, triethylene glycol monoethyl ether, monoethylene glycol monopropyl ether, diethylene glycol monopropyl ether, triethylene glycol monopropyl ether, and ethylene glycol mono butyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, monopropylene glycol monoethyl ether, dipropylene glycol monoethyl ether, tripropylene glycol monoethyl ether, monopropylene glycol monopropyl ether, dipropylene glycol monopropyl ether, tripropylene glycol monopropyl ether, monopropylene glycol monobutyl ether, dipropylene glycol monobutyl ether, tripropylene glycol monobutyl ether, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, tripropylene glycol, diethylene glycol monobutyl ether, monoethylene glycol dimethyl ether (monoglyme), diethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol diethyl ether,Examples of the ethyl alcohol include triethylene glycol dimethyl ether, diethylene glycol dibutyl ether, dimethoxytetraethylene glycol, dipropylene glycol dimethyl ether, monopropylene glycol monomethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, ethylene glycol monophenyl ether, ethylene glycol methyl ether, ethylene glycol ethyl ether, 3-methoxy-3-methyl-1-butanol, diethylene glycol monohexyl ether, diethylene glycol ethyl methyl ether, and dipropylene glycol ethyl methyl ether.

[0027] <(e3) Esters (excluding (e2) ethers)> Examples of (e3) esters (excluding (e2) ethers) include monoester solvents, ester solvents having two carbonyl groups, carbonate ester solvents, and cyclic ester solvents. Specific examples of (e3) components include methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, butyl acetate, see-butyl acetate, methoxybutyl acetate, amyl acetate, soybean fatty acid methyl esters, methyl lactate, ethyl lactate, propyl lactate, dibasic acid esters (DBE), ethyl acetoacetate, γ-butyrolactone, dimethyl carbonate, diethyl carbonate, dimethyl oxalate, and diethyl oxalate.

[0028] <(e4) Alcohols (excluding (e2) ethers)> (e4) Alcohols (excluding (e2) ethers) include monoalcohol-based solvents. Specific examples of the (e4) component include ethanol, methanol, 1-propanol, isopropyl alcohol, 1-butanol, isobutyl alcohol, tertiary butanol, secondary butyl alcohol, benzyl alcohol, diacetone alcohol, 2-propyn-1-ol, and 2-ethylhexanol.

[0029] <(e5) Amide compound> (e5) Amide compound is a cyclic or acyclic compound having an amide bond. Examples of the (e5) component include N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, 2-pyrrolidone, 3-methoxy-N,N-dimethylpropanamide, 3-butoxy-N,N-dimethylpropanamide, dimethylformamide, dimethylacetamide, and dimethylacetoacetamide.

[0030] <(e6) Chloroolefin> (e6) Chloroolefin is an olefin compound containing carbon and chlorine atoms and may further contain hydrogen or fluorine atoms. (e6) component includes trans-1,2-dichloroethylene and trichloroethylene, which are hydrochloroolefins containing hydrogen atoms, tetrachloroethylene (perchloroethylene), 1,1-dichloro-2,3,3,3-tetrafluoropropene (CFO-1214ya), 1,1,2-trichloro-3,3,3-trifluoropropene (CFO-1213xa), and the like, which do not contain hydrogen atoms.

[0031] ≪(e7) Hydrobromocarbon≫ (e7) Hydrobromocarbon is a compound consisting of only carbon, bromine and hydrogen atoms. Examples of the (e7) component include normal propyl bromide (1-bromopropane) and isobutyl bromide.

[0032] <(e8) Hydrofluorocarbon> (e8) Hydrofluorocarbon (HFC) is a compound consisting of only carbon atoms, fluorine atoms and hydrogen atoms, and does not have a carbon-carbon double bond. (c8) component, for example, 1,1,1,3,3-pentafluorobutane (HFC-365mfc), 1,1,2,2,3,3,4-heptafluorocyclopentane (HFC-c447ef), 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctane, 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-43-10mee). (c8) component commercially available products include Solkan (registered trademark) 365mfc (manufactured by Nippon Solvay Co., Ltd.), Zeorora (registered trademark) H (manufactured by Nippon Zeon Co., Ltd.), etc.

[0033] <(e9) Hydrofluoroether (excluding components (B) and (C))> (e9) Hydrofluoroether (HFE) is a compound containing carbon atoms, fluorine atoms, hydrogen atoms, and an ether bond (-O-), other than components (B) and (C). Examples of components (e9) include ethyl nonafluorobutyl ether, ethyl nonafluoroisobutyl ether, 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-(trifluoromethyl)pentane, 1,1,1,2,3,3-hexafluoro-4-(1,1,2,3,3,3-hexafluoropropoxy)pentane, 1,1,1,2,3,4,4,4-octafluoro-2-methoxy-3-(trifluoromethyl)butane, methyl perfluoropropyl ether, and 1,1,2,3,3,3-hexafluoropropyl methyl ether.

[0034] <(e10) Chlorinated hydrocarbons (excluding (e6) chloroolefins and components (A))> (e10) Chlorinated hydrocarbons (excluding (e6) chloroolefins and component (A)) are hydrocarbon solvents that contain chlorine atoms and carbon atoms and may contain hydrogen atoms. Examples of the (e10) component include methylene chloride.

[0035] (E) Each of the additional components may be one type or a combination of two or more types.

[0036] <<(F) Additives>> The (F) additive is not particularly limited as long as it is a component commonly used in the field of steam cleaning compositions. The (F) additive may be one or more selected from the group consisting of water, ultraviolet absorbers, antioxidants, rust inhibitors, antifoaming agents, surfactants, chelating agents, etc. Note that the (E) component that acts as the (F) component is included in the (F) component.

[0037] The ultraviolet absorber and the antioxidant are components that improve the stability of the steam cleaning composition during long-term storage, etc. Examples of the ultraviolet absorber include benzotriazole-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, and hindered amine-based ultraviolet absorbers. Examples of the antioxidant include phenol-based antioxidants, amine-based antioxidants, sulfur-based antioxidants, and phosphorus-based antioxidants.

[0038] Phenolic antioxidants include 2,6-di-t-butyl-4-methylphenol, triethylene glycol-bis[3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate], 1,6-hexanediol-bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,4-bis-(n-octylthio)-6-(4-hydroxy-3,5-di-t-butylanilino)-1,3,5-triazine, pentaerythrityl-tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], 2,2-thio- Diethylene bis[3-(3,5-di-t-butyl-hydroxyphenyl)propionate], octadodecyl-3-[3,5-di-t-butyl-4-hydroxyphenyl]propionate], N,N-hexamethylene bis(3,5-di-t-butyl-4-hydroxy-hydrocinnamide), 3,5-di-t-butyl-4-hydroxy-benzylphosphonate-diethyl ester, 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, 2,4-bis[(octylthio)methyl]-o-cresol, and the like.

[0039] Examples of the amine-based antioxidant include alkylated diphenylamine, tris-(3,5-di-t-butyl-4-hydroxybenzyl)-isocyanurate, N,N-di-sec-butyl-p-phenylenediamine, p-phenylenediamine derivatives, and 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethyl)isocyanurate. Examples of sulfur-based antioxidants include 2,4-bis[(octylthio)methyl]-o-cresol, dilauryl-3,3-thiodipropionate, dimyristyl-3,3-didipropionate, distearyl-3,3-thiodipropionate, pentaerythrityl tetrakis(3-laurylthiopropionate), ditridecyl-3,3-thiodipropionate, 2-mercaptobenzimidazole, bis[2-methyl-4-(3-n-alkylthiopropionyloxy)-5-t-butylphenyl]sulfide, etc. Examples of phosphorus-based antioxidants include tris-nonylphenyl phosphite, triphenyl phosphite, tris(2,4-di-t-butylphenyl)phosphite, tris(isodecyl)phosphite, etc.

[0040] The chelating agent may be an aminocarboxylic acid-based chelating agent, and preferred are hydroxyethylaminoacetic acid, hydroxyethyliminodiacetic acid, ethylenediaminetetraacetic acid, and salts thereof.

[0041] Examples of the rust inhibitor include cyclohexylamine, dicyclohexylamine, and N,N-bis(2-hydroxyethyl)-N-cyclohexylamine. Examples of the surfactant include nonionic surfactants, and preferred are higher alcohol ethylene oxide adducts, alkylphenol ethylene oxide adducts, fatty acid ethylene oxide adducts, higher alkylamine ethylene oxide adducts, fatty acid esters of sorbitol and sorbitan, sucrose fatty acid esters, silicone surfactants, and fluorine-based surfactants.

[0042] The additives other than the above-mentioned components are not particularly limited as long as they are components commonly used in the field of steam cleaning compositions, and can be used as appropriate. Each of the (F) additives may be one type or a combination of two or more types.

[0043] <Composition of the steam cleaning composition> In the steam cleaning composition, the contents of each component are as follows:

[0044] When the total of the (A), (B) and (C) components is 100 parts by weight, the content of the (A) component is more than 0 parts by weight and less than 50 parts by weight. When the total of the (A), (B) and (C) components is 100 parts by weight, if the content of the (A) component is 50 parts by weight or more, damage to various substrates becomes significant during steam cleaning. From the viewpoint of further suppressing damage to various substrates, the content of the (A) component is preferably 21 to 47 parts by weight when the total of the (A), (B) and (C) components is 100 parts by weight.

[0045] When the total of the (B) and (C) components is 100 parts by weight, the content of the (B) component is more than 0 parts by weight and not more than 85 parts by weight. When the total of the (B) and (C) components is 100 parts by weight, if the content of the (B) component exceeds 85 parts by weight, the cleaning properties are poor. From the viewpoint of better cleaning properties, when the total of the (B) and (C) components is 100 parts by weight, the content of the (B) component is preferably 13 to 83 parts by weight.

[0046] When the total of the (A), (B), (C) and (D) components is 100 parts by weight, the total of the (A) component content and the (D) component content is 40 parts by weight or more and less than 100 parts by weight. When the total of the (A), (B), (C) and (D) components is 100 parts by weight, if the total of the (A) component content and the (D) component content is less than 40 parts by weight, the cleaning ability is poor. From the viewpoint of more excellent cleaning ability, when the total of the (A), (B), (C) and (D) components is 100 parts by weight, the total of the (A) component content and the (D) component content is preferably 40 to 60 parts by weight, and particularly preferably 45 to 60 parts by weight.

[0047] When the total amount of components (A), (B), (C) and (D) is 100 parts by weight, the content of component (A) is preferably 15 to 38 parts by weight.

[0048] When the total of the components (A), (B), (C) and (D) is 100 parts by weight, the total content of the component (B) and the content of the component (C) is preferably 40 to 60 parts by weight, and more preferably 55 to 60 parts by weight.

[0049] When the total amount of the components (A), (B), (C), and (D) is 100 parts by weight, the amount of the component (D) is preferably 10 to 45 parts by weight, more preferably 20 to 45 parts by weight or more, and particularly preferably 22 to 40 parts by weight.

[0050] From the viewpoint of achieving a more excellent effect as a steam cleaning composition, the total content of components (A), (B), (C) and (D) is preferably 85 to 100 parts by weight, particularly preferably 90 to 100 parts by weight, based on 100 parts by weight of the entire composition, with the remainder being components (E) and (F).

[0051] [Method of manufacturing the steam cleaning composition] The steam cleaning composition may be produced by any method, including the step of subjecting raw material components contained in the steam cleaning composition to an appropriate method selected from the known methods, for example, one or more means selected from the group consisting of stirring, mixing, dissolving, and dispersing.

[0052] [Uses of steam cleaning compositions] The steam cleaning composition is used for cleaning including a step of generating steam. Specifically, the steam cleaning composition has excellent solubility for oil, flux, and / or uncured resin, and can therefore be used as a cleaning agent for cleaning an object to be cleaned having one or more selected from the group consisting of oily dirt, oil, flux, and uncured resin attached thereto. It is particularly preferable that the cleaning method is a cleaning method for cleaning an object to be cleaned having one or more selected from the group consisting of oily dirt and oil attached thereto.

[0053] <<Oil>> Examples of oils include mineral oils, vegetable oils, animal oils, heavy oils, waxes, silicone oils, and fluorine oils. These oils may be used, for example, as cutting oils, press oils, drawing oils, heat treatment oils, rust-preventive oils, lubricating oils, metal processing oils (e.g., lubricants for metal plastic processing), greases, asphalt, and water-soluble oils. The viscosity of the oil is not particularly limited as long as it is a viscosity that can be used for the above-mentioned applications. The viscosity of the oil is 10 to 10,000 mm at 25°C. 2 The steam cleaning composition may have a high viscosity (for example, 5,000 to 10,000 mm at 25° C. 2 It can also exhibit excellent cleaning properties against oils and oily stains (viscosity of 100 / s).

[0054] The mineral oil is not particularly limited, and a commercially available product is Pulley SF Oil (manufactured by Idemitsu Kosan Co., Ltd.). Examples of vegetable oils include olive oil, linseed oil, tung oil, sesame oil, safflower oil, soybean oil, castor oil, cottonseed oil, coconut oil, corn oil, and dehydrated castor oil. Fatty acids constituting vegetable oils are saturated or unsaturated fatty acids of C12 to C18, and specific examples include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, and eleostearic acid. Examples of animal oils include fish oil, whale oil, lard, and beef tallow. Examples of heavy oils include asphaltene. Examples of resins include pitch and rosin. Examples of waxes include vegetable, animal, petroleum, and synthetic hydrocarbons.

[0055] Silicone oil is a linear polymer of siloxane bond, and may be mainly dimethyl silicone oil or methylphenyl silicone oil with other organic groups such as carboxyl group, amino group, polyether group or epoxy group introduced into the side chain or end.Specific examples of such silicone oil include dimethyl polysiloxane, methylphenyl polysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, polyoxyethylene-methyl polysiloxane, etc.Commercially available products of such silicone oil include KF-96L-2CS and KF-6012 manufactured by Shin-Etsu Chemical Co., Ltd.

[0056] Fluorine oil is a substance in which some or all of the hydrogen atoms in a polyalkyl ether compound are replaced with fluorine, and may contain further atoms such as halogens such as chlorine and bromine, phosphorus, sulfur, and nitrogen. Commercially available fluorine oils include, for example, Fomblin Y-LVAC, Y-HVAC, Y04, and YR manufactured by Solvay Solexis Co., Ltd.; BARRIERTA J100 fluid, BARRIERTA J25 fluid, BARRIERTA J400 fluid, BARRIERTA J25V, BARRIERTA SJ07, BARRIERTA SJ15, and BARRIERTA SJ30 manufactured by NOK Kluber Co., Ltd.; Krytox 1506, Krytox 1514, and Krytox 1525 manufactured by DuPont Co., Ltd.; and Demnum S-20 manufactured by Daikin Industries, Ltd.

[0057] Water-soluble oils are broadly classified into emulsion type, soluble type, and solution type. Emulsion type oils are mainly composed of water-insoluble oils such as mineral oil and fatty oil, and surfactants, and form a milky emulsion when diluted with water. Soluble type oils also contain water-insoluble oils and surfactants, but become transparent to translucent when diluted with water. Solution type oils are mainly composed of water-soluble inorganic salts, and become transparent when diluted with water. There is also emulsion type silicone oil, which is a mixture of silicone oil, surfactant, and water.

[0058] <<Flux>> Examples of the flux include rosin-based fluxes. Examples of the rosin-based flux include non-activated rosin fluxes mainly composed of rosins such as rosin (resin acid mainly composed of abietic acid) and modified rosin; and activated rosin fluxes mainly composed of the rosins and one or more activators selected from the group consisting of inorganic acid salts of amine compounds (e.g., hydrochloride, sulfate) and organic acids. Examples of inorganic acid salts of amine compounds include triethanolamine hydrochloride, triethylenetetraamine hydrochloride, cyclohexylamine hydrochloride, aniline hydrochloride, etc. Examples of the organic acid include carboxylic acids (including dicarboxylic acids) such as succinic acid, adipic acid, glutaric acid, sebacic acid, and maleic acid; and oxyacids (hydroxycarboxylic acids).

[0059] The flux may be provided in the form of cream solder in which the soldering metal and rosin flux are integrated. The cream solder is a composition containing a solder alloy powder, a resin, an activator, an antioxidant, a thixotropic agent, and a solvent, and is composed of so-called metal powder and flux components.

[0060] <<Resin>> The resin in the uncured resin is not particularly limited, and examples thereof include urethane resin, epoxy resin, acrylic resin, styrene resin, silicone resin, polyvinyl chloride resin, polycarbonate resin, and acrylonitrile-butadiene-styrene resin.

[0061] Examples of urethane resins include reaction products of diisocyanates such as tolylene diisocyanate (TFI) and diphenylmethane diisocyanate (MFI) with polyols such as polypropylene glycol. When the urethane resin is in a foam form, it may be any of soft foam, semi-rigid foam, and rigid foam. Examples of additives to be mixed with the urethane resin include curing agents, curing accelerators, emulsifiers, foaming agents, stabilizers, plasticizers, flame retardants, antistatic agents, colorants, sliding modifiers, and impact modifiers. Cured products of urethane resins are used for heat insulating materials, coating agents for electronic substrates, and the like.

[0062] Examples of epoxy resins include bisphenol A type epoxy resins, bisphenol F type epoxy resins, bisphenol AF type epoxy resins, polyglycidyl ethers of polyhydric alcohols, polyglycidyl esters of polybasic acids, 3,4-epoxycyclohexyl-3',4'-epoxycyclohexane carboxylate, vinylcyclohexene diepoxide, cresol novolac type epoxy resins, and epoxy resins having a hydantoin ring.Additives that are mixed into the epoxy resins include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge imparting agents, sliding property improvers, impact resistance improvers, and reactive diluents.

[0063] The curing agent for the epoxy resin may be any one that is commonly used as a curing agent for the epoxy resin, such as novolacs such as phenol novolac, biphenol novolac, and bisphenol A novolac, acid anhydrides such as phthalic anhydride, pyromellitic anhydride, and benzophenone tetracarboxylic anhydride, amines such as diaminodiphenylmethane, diaminodiphenylsulfone, metaphenylenediamine, and hexamethylenetetramine, and amide resins such as polyamidoamine. The curing accelerator may be, for example, a tertiary amine or an organic phosphorus compound. The cured product of the epoxy resin is used as an adhesive or a potting agent for electronic substrates.

[0064] Examples of the acrylic resin include compounds having an acryloyl group and / or a methacryloyl group, and specifically, methyl (meth)acrylate and 2-hydroxyethyl (meth)acrylate. Here, (meth)acrylate means at least one of acrylate and methacrylate. The acrylic resin preferably does not have a fluorine atom, and particularly preferably does not have a halogen atom. Examples of additives that are mixed with the acrylic resin include a curing agent, a curing accelerator, a filler, a stabilizer, a plasticizer, a lubricant, a flame retardant, a flame retardant assistant, an antistatic agent, a colorant, an electrostatic charge imparting agent, a sliding property improver, an impact resistance improver, and a reactive diluent. Since the acrylic resin has good processability and excellent transparency, the cured product of the acrylic resin is used for windshield glass, windows of aircraft, ships, automobiles, etc., aquariums, lenses, lighting equipment, displays, signs, etc.

[0065] Styrene resin is a polymer with styrene as a monomer, and its cured product is also called polystyrene. When the styrene resin is in a foam form, the cured foam of the styrene resin is also called expanded styrene. Additives to be mixed with the styrene resin include foaming agents, curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge imparting agents, sliding improvers, impact resistance improvers, and reactive diluents. The cured product of the styrene resin is used for automobile lamp lenses and covers.

[0066] Silicone resin is a high condensation product of an organic silicon compound, and has a repeating structure of dimethylsiloxane or methylphenylsiloxane.Additives that are mixed into silicone resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge imparting agents, sliding improvers, impact resistance improvers, and reactive diluents.Cured products of silicone resins are used in adhesives, coating agents, etc.

[0067] Polyvinyl chloride resin is a homopolymer of vinyl chloride or a copolymer of vinyl chloride and another vinyl monomer.Additives that are mixed into polyvinyl chloride resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, chargeability imparting agents, sliding property improvers, impact resistance improvers, and reactive diluents.Cured products of polyvinyl chloride resin are used in building materials such as pipes and flooring materials.

[0068] Polycarbonate resin is a type of thermoplastic. The junctions between monomer units are composed of carbonate groups (-O-(C=O)-O-). Additives that are mixed into polycarbonate resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, electrostatic charge imparting agents, sliding property improvers, impact resistance improvers, and reactive diluents. Cured polycarbonate resins are widely used in components for automobiles, etc., and are used in roofs, headlamp lenses, etc.

[0069] Acrylonitrile-butadiene-styrene resin is an acrylonitrile-styrene copolymer, which is a copolymer of acrylonitrile and styrene with polybutadiene, a rubbery polymer, dispersed therein, and is mainly composed of three components: acrylonitrile, butadiene, and styrene. Additives that are mixed into acrylonitrile-butadiene-styrene resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, electrostatic charge imparting agents, sliding improvers, impact resistance improvers, and reactive diluents. Cured products of acrylonitrile-butadiene-styrene resin are widely used in interior and exterior parts of automobiles, etc., and are used in wheel caps, wheel covers, dashboards, etc.

[0070] <<Oily stains>> The oily stains include oil stains, flux stains, and uncured resin stains. The oil, flux, and uncured resin that are the raw materials for the oily stains are as described above. The oily stains may contain dust. The oily stains include non-polar oily stains, oily stains due to polar components, and oily stains due to multiple components with different polarities, depending on the polarity of the oil. The flux stains include rosin, which is a flux component, an inorganic acid salt of an amine compound, an organic acid, and a component that is partially altered or carbonized by reflow at high temperatures. The cream solder stains include the flux component stains and metal powder. The resin stains include non-polar resin stains, oily stains due to polar components, and oily stains due to multiple components with different polarities, depending on the polarity of the resin component and the components used in combination. The oily stains are preferably oil stains.

[0071] [Cleaning method] A cleaning method using the steam cleaning composition (i.e., a method of using the steam cleaning composition) includes a step of generating steam from the steam cleaning composition. Here, the steam generated from the steam cleaning composition (hereinafter also referred to as "steam component") may have the same or different composition as the steam cleaning composition, and may vary depending on the composition of the steam cleaning composition.

[0072] The cleaning method using the steam cleaning composition includes a steam contacting step of contacting an object to be cleaned with steam generated from the steam cleaning composition. The object to be cleaned has oily dirt and / or oil adhering to its substrate. The steam contacting step removes the oily dirt and / or oil adhering to the substrate from the substrate. When the oily dirt includes solid dirt such as dust, the solid dirt can be removed simultaneously with the removal of the oily dirt.

[0073] <Base material> The material of the substrate is not particularly limited, and examples thereof include metals, fibers, glass, ceramics, rubber, and plastics. Examples of metals include silver, zinc, nickel, iron, aluminum, copper, manganese, magnesium, stainless steel, and aluminum alloys (alloys of aluminum and one or more metals consisting of copper, manganese, silicon, magnesium, zinc, and nickel). Examples of rubbers include nitrile rubber, butyl rubber, natural rubber, styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, and thermoplastic elastomers (styrene-based, olefin-based, and vinyl chloride-based). Examples of plastics include polycarbonate resin, PET resin (polyethylene terephthalate resin), epoxy resin, acrylic resin, silicone resin, ABS resin (acrylonitrile-butadiene-styrene resin), polyolefin resin (polypropylene, polyethylene, etc.), and urethane resin. The substrate may be plastic as long as the above-mentioned oily dirt, oil, flux, uncured resin, etc. are removed from the substrate. The substrate of the object to be cleaned preferably contains plastic and / or rubber, and more preferably consists of only plastic and / or rubber.

[0074] Specific examples of the substrate include devices and parts thereof for obtaining a cured product of the resin, metal processed products, electric and electronic parts, optical parts, automobile parts, machine parts, semiconductor parts, and display parts.

[0075] Examples of electric and electronic parts include wiring boards such as printed circuit boards and ceramic substrates. Examples of optical parts include optical lenses (e.g., camera lenses) and parts for optical lenses (e.g., camera housings). Examples of automobile parts include metal parts used for automobile shafts, frame parts, exterior parts, etc. Examples of machine parts include bearings for vacuum pumps, semiconductor manufacturing equipment, cleaning equipment, motors, fans, etc., bearings for precision machine parts such as watches, and parts such as rollers for printing machines. Examples of semiconductor-related parts include electronic parts such as IC chips and resistors. Examples of display parts include liquid crystal substrates, organic EL substrates, inorganic EL substrates, etc. The shapes of these parts are not limited to plate-shaped members, but may be pipe-shaped members or long members with circular or rectangular cross sections, or members with other complex shapes.

[0076] The object to be cleaned may be an object for daily maintenance, that is, cleaned once or twice a day, or an object for overhaul, that is, cleaned once every six months to a year, for example.

[0077] <Steam contact process> The steam contact step is not particularly limited as long as it includes a method of generating steam from a steam cleaning composition and contacting the object to be cleaned with the generated steam. Examples of the steam contact step include steam cleaning, steam rinsing, steam drying, or a combination thereof, and can be appropriately selected depending on the purpose.

[0078] In the steam contact step, the liquid temperature in the steam bath is preferably a temperature equal to or higher than the boiling point of the steam cleaning composition, which allows the steam cleaning composition to efficiently generate steam.

[0079] <Additional cleaning methods> The cleaning method may further include a step of immersion cleaning, shower cleaning, ultrasonic cleaning, wiping cleaning, barrel cleaning, spray cleaning, splash cleaning, or a combination of these. Here, the conditions for the further step such as shower cleaning or ultrasonic cleaning can be appropriately set. The cleaning method preferably includes an immersion step of immersing an article in a steam cleaning composition, and the steam contact step.

[0080] In the immersion step, the liquid temperature of the steam cleaning composition when it does not contain dirt such as oil can be appropriately set according to the boiling point of the solvent composition. In addition, when the step following the immersion step is a steam contact step, the liquid temperature of the steam cleaning composition in the immersion step is preferably 5° C. or more lower than the liquid temperature in the steam contact step. By setting the temperature at such a level, dirt can be efficiently removed from the object to be cleaned.

[0081] The cleaning time corresponding to the contact time of the steam cleaning composition and the object to be cleaned is not particularly limited as long as it is a time that can remove oily dirt and / or oil from the substrate. For example, the cleaning time may be 1 second or more and 2 hours or less. The same applies to the steam contact step, but the contact step may be 1 second or more and 2 hours or less, and may simply involve passing the generated steam.

[0082] [Cleaning system used in the cleaning method] The cleaning system (cleaning apparatus) used in the cleaning method is not particularly limited, and examples thereof include cleaning apparatuses disclosed in JP 2008-163400 A and JP 2015-217319 A, which have a cleaning tank that stores a cleaning agent and in which the object to be cleaned is immersed, and a steam tank that generates steam of the cleaning agent.

[0083] Further, the cleaning system includes a cleaning system including a boiling tank that contains a steam cleaning composition, in which an object to be cleaned is immersed, and that generates steam of the steam cleaning composition, a recovery section that liquefies and recovers the steam of the steam cleaning composition generated by the boiling tank, and a water separator that separates water from the recovery liquid recovered by the recovery section to extract the steam cleaning composition. The cleaning system is preferably a single-tank cleaning machine. An example of such a system is the cleaning system disclosed in JP 2022-093150 A.

[0084] A non-limiting outline of the cleaning system is shown in Fig. 1. In Fig. 1, the cleaning system includes a boiling tank (11 in Fig. 1) in which a steam cleaning composition (1 in Fig. 1) is accommodated, a recovery section (e.g., 21 and 22 in Fig. 1) that liquefies and recovers a steam component (2 in Fig. 1) generated from the boiling tank, and a water separator (23 in Fig. 1) that separates water from the liquid recovered by the recovery section to extract the steam component and supplies the extracted steam component to the boiling tank. In Fig. 1, solid arrows indicate the flow of the steam component.

[0085] The boiling tank is a tank for boiling and cleaning the object to be cleaned. The boiling tank may be called a vapor tank or steam tank. The boiling tank is equipped with a heater (24 in FIG. 1) for maintaining the temperature at or above the temperature at which the vapor cleaning composition generates steam (preferably at or above the boiling point of the vapor cleaning composition). The boiling tank may have an ultrasonic vibrator that applies ultrasonic vibration to the cleaning liquid.

[0086] In the washing system, a pump and a filter circuit can be installed in the boiling tank. By providing the washing system with a pump and a filter circuit, if the dirt to be removed from the object to be washed is solid, the accumulation of dirt in the boiling tank tends to be avoided.

[0087] A recovery section for liquefying and recovering the steam component generated by the boiling tank is provided at the top of the boiling tank. The recovery section is not particularly limited as long as it is provided with a means for liquefying the steam component and a means for supplying the liquefied component to the water separator.

[0088] The means for liquefying the vapor component is not particularly limited, but a cooling pipe (21 in FIG. 1) is preferable. The cooling pipe is a means for lowering the temperature of the vapor component to liquefy it. By providing the cleaning system with a cooling pipe, the vapor component generated from the vapor cleaning composition is further reduced from being released to the outside from the cleaning system. The number of turns of the cooling pipe is preferably 3 or more, more preferably 4 or more, even more preferably 5 or more, and particularly preferably 6 or more.

[0089] The means for supplying the liquefied components to the water separator is not particularly limited, but a gutter (22 in FIG. 1) is preferred. The gutter is provided to supply the components liquefied by a cooling pipe or the like to the water separator. Here, the liquid liquefied by the means for liquefying the steam generated from the steam cleaning composition and supplied to the water separator (i.e., the liquid containing the composition of the steam generated from the steam cleaning composition and water) is referred to as the recovered liquid.

[0090] The recovered liquid is then extracted by a water separator, which will be described later, and reused as regenerated liquid.

[0091] The water separator is provided to separate water from the recovered liquid, extract the steam cleaning composition, and return the resultant to the boiling tank. The means for separating water using the water separator is not particularly limited as long as it can separate water from the recovered liquid and extract the steam cleaning composition, and examples of the means include gravity separation and membrane separation. The water separator preferably extracts the steam cleaning composition by gravity separation.

[0092] In the case where the recovery section includes a cooling pipe and a gutter, and the means of water separation by the water separator is gravity separation, An example of the structure of the water separator is disclosed in JP 2015-217319 A.

[0093] Although not shown, the cleaning system may have a supply means for shower cleaning with the vapor cleaning composition. The cleaning effect tends to be improved by shower cleaning with the composition after boiling cleaning and / or vapor cleaning the object to be cleaned and colliding the composition with the surface of the object to be cleaned.

[0094] <Cleaning method using a cleaning system> A cleaning method using the cleaning system includes the following steps: (1A) immersing the object to be cleaned in a boiling tank and boiling cleaning it, and (1B) placing the object to be cleaned in an area of ​​steam generated from the boiling tank and steam cleaning it.

[0095] Step (1A) is a step of immersing the object to be cleaned in a boiling tank and cleaning it by boiling. In FIG. 1, the object to be cleaned (S in FIG. 1) is moved from position S1 at the start of cleaning to position S2 and immersed in the steam cleaning composition. In step (1A), the object to be cleaned comes into contact with the liquid of the composition. In the boiling tank, the steam cleaning composition is brought to a boiling state, that is, in boiling cleaning, the steam cleaning composition is heated by a heating means such as a heater.

[0096] In boiling cleaning, in order to enhance the cleaning effect, it is preferable to combine immersion with a means such as stirring, shaking, ultrasonic vibration, or air bubbling, and it is more preferable to combine a means using ultrasonic vibration.

[0097] In step (1B), the object to be cleaned is placed in the steam area generated from the boiling tank and steam cleaned. In FIG. 1, the object to be cleaned is moved from position S2 to position S4, which is the upper part of the boiling tank, and placed in the steam area. The steam area is made of steam generated from the steam cleaning composition. In step (1B), steam cleaning is performed by bringing the object to be cleaned into contact with the steam generated from the boiling tank. This exchanges the dirt components attached to the object to be cleaned with the steam components in the steam area. In addition, since the object to be cleaned comes into contact with the steam components in step (1B), rinsing (steam rinsing) is performed by the steam cleaning step. Thereafter, the object to be cleaned is moved to position S5, where cleaning is completed, and cleaning is completed.

[0098] In addition, the cleaning method according to the present invention may be carried out using the cleaning system shown in FIGS. 2 to 4 of JP 2022-093150 A. EXAMPLES

[0099] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to these examples. Unless otherwise specified, parts are parts by weight.

[0100] (Products used) The components used in the examples are as follows: The compositions of the examples and comparative examples were prepared according to the compositions (wt %) in the table by using the following solvents as they were or by mixing the solvents.

[0101] 1. Component (A) A-1: 1233Z; cis-1-chloro-3,3,3-trifluoropropene (HCFO-1233zd(Z), manufactured by Central Glass Co., Ltd.) 2.(B) Component B-1: HFE-347pc-f: 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (manufactured by AGC Corporation, Asahiklin AE-3000)

[0102] 3.(C) Component C-1: Novec(TM) 7100; 3M(TM) Novec(TM) 7100 high-performance liquid (manufactured by 3M Japan Ltd.) (a mixture of 20-80 parts by weight of methyl nonafluorobutyl ether and 20-80 parts by weight of methyl nonafluoroisobutyl ether) C-2: Methyl nonafluoroisobutyl ether (manufactured by Hangzhou Fanda Chemical Co., Ltd.) 4.(D) Component D-1: Isooctane (manufactured by Sankyo Chemical Co., Ltd., Isooctane) D-2: Methylcyclohexane (manufactured by Sankyo Chemical Co., Ltd., Methylcyclohexane) D-3: Isohexane (Sankyo Chemical Co., Ltd., Isohexane) D-4: Daphne Alpha Cleaner L (Idemitsu Kosan Co., Ltd., isooctane 80-90% by weight, isononane less than 10% by weight, isoheptane less than 5% by weight, hexane less than 2% by weight, synthetic hydrocarbon less than 1% by weight) D-5: Daphne Alpha Cleaner MX (Idemitsu Kosan Co., Ltd., 90 parts by weight or more and 100 parts by weight or less of isoalkane with hydrocarbon numbers of 10 to 13)

[0103] 5. Ingredients other than (A) to (D) E-1: Novec(TM) 7200: A mixture of ethyl nonafluoroisobutyl ether and ethyl nonafluorobutyl ether (3M(TM) Novec(TM) 7200 high-performance liquid, manufactured by 3M Japan Ltd.)

[0104] 6.Oil etc. (1) Silicone oil 1000cs: Dimethyl silicone oil (Shin-Etsu Chemical Co., Ltd., KF96-1000CS-1, viscosity 1,000 cSt (25°C)) (2) Silicone oil 3000cs: Dimethyl silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd., KF96-3000CS-1, viscosity 3,000 cSt (25°C)) (3) Silicone oil 5000cs: Dimethyl silicone oil (Shin-Etsu Chemical Co., Ltd., KF96-5000CS-1, viscosity 5,000 cSt (25°C)) (4) Margplus ST25: Mineral oil (manufactured by Idemitsu Kosan Co., Ltd.) (hydrogenated low viscosity paraffin 90% by mass or more and 100% by mass or less, hydrogenated medium viscosity paraffin 1% by mass or less and less than 10% by mass, 2,6-di-t-butyl-4-cresol 0.25% by mass or less and less than 1% by mass, solvent refined paraffin oil 0.1% by mass or more and 1% by mass or less, lubricating oil additives less than 7% by mass, viscosity 10.8 mm 2 / s(40℃) (5) Pulley SF oil: mineral oil (manufactured by Ozawa Kogyo Co., Ltd.) (mineral oil 90% by mass or more but less than 100% by mass, lubricating oil additives less than 10% by mass, 2,6-di-tertiary-4-cresol less than 1% by mass, viscosity 17.97 mm 2 / s(40℃)

[0105] 7. Test Example The following Test Examples 1 to 5 were carried out.

[0106] Test example 1: PC (polycarbonate) damage test A polycarbonate resin plate (PC plate) (KPAC201-1, made by Hikari Corporation, transparent, 1 mm thick, 200 mm wide, 300 mm long) was cut into 3 cm x 1 cm pieces. 150 g of the cleaning agent and a PTFE-coated stirrer were placed in a 200 mL side-arm flask connected to a Liebig condenser (total length 33 cm, cooling section 18 cm). The side-arm flask was heated and stirred on a hot plate equipped with a stirrer using aluminum beads to boil the cleaning agent. After boiling, 20 g of the distillate distilled from the condenser and the PC plate were immersed in the distillate collected in a standard bottle, the bottle was capped, and the PC plate was heated at 50°C for 2 hours. The surface of the obtained PC plate was observed and its damage was evaluated according to the following criteria. ◯: The resin surface had not lost its luster or transparency, and there was no damage to its appearance. ×: Some damage was observed in appearance. The resin surface changed or collapsed.

[0107] Test example 2: PC (vapor phase) damage test 60 ml of the composition of each Example and Comparative Example was placed in a 300 ml three-neck flask, and one test sample from each example (a test piece made by cutting a polycarbonate resin plate (KPAC201-1, made by Hikari Corporation, transparent, 1 mm thick, 200 mm wide, 300 mm long) to 3 cm x 1 cm) was placed in the gas phase, a cooling tube was attached to the top, and the plate was heated under reflux using a mantle heater. The cooling water passing through the cooling tube was kept below 15°C, with a temperature difference within ±2°C. After 30 minutes, the test sample was removed and naturally dried, and the obtained PC plate was evaluated as follows. ◯: The resin surface had not lost its luster or transparency, and there was no damage to its appearance. ×: Some damage was observed in appearance. The resin surface changed or collapsed. It broke easily when bent.

[0108] Test Example 3: Cleaning Test (1) 0.3 g of silicone oil (KF96-5000CS-1, viscosity 5,000 cst, manufactured by Shin-Etsu Chemical Co., Ltd.) was weighed into a disposable glass test tube (straight mouth, capacity 10 mL). 3 g of the composition was placed in the test tube, and the tube was capped with a rubber stopper and shaken about 20 times to mix. After leaving it to stand for 10 minutes, the state of the composition was confirmed. ◎: No phase separation, transparent mixture ○: No phase separation, cloudy mixture △: Phase separation occurred and some parts became cloudy ×: No white turbidity, phase separation

[0109] Test example 4: Steam cleaning test <Preparation of the object to be cleaned> 1 mg of mineral oil, fluorine oil or silicone oil was dropped onto the surface of a SUS304 plate (manufactured by Iwata Seisakusho Co., Ltd., 10 mm x 10 mm x 0.1 mm) and left for 1 hour to obtain a cleaning test sample (object to be cleaned) with each oil attached. <Test Method> (1) Cleaning method 1 500 ml of the solvent composition of each Example and Comparative Example was placed in a 3 L beaker fitted with a SUS cooling coil (9 turns, outer diameter of the tube: 6 mm, cooling water passing through the cooling tube was at room temperature (approximately 20°C)) on top, and the mixture was boiled to the boiling point in a silicone oil bath, and the cleaning test sample was immersed in the mixture for 60 seconds for immersion cleaning. The test sample was then exposed to the generated steam for 60 seconds, after which it was removed. The device used in this test method corresponds to the cleaning system described above.

[0110] <Evaluation of cleaning ability> After the test samples were naturally dried, the surfaces of the test samples were observed with the naked eye or using an HFMI digital stereo microscope STZ-161-TLEF1080M (manufactured by Shimadzu Rika Co., Ltd.). ◎: No residual oil was observed with the naked eye or under a microscope. ○: No remaining oil was observed with the naked eye. Microscopic observation revealed a very small amount of remaining oil, but this did not pose a problem in practical use. ●: A very small amount of remaining oil was visible to the naked eye. ×: Oil residue was clearly observed with the naked eye.

[0111] Test Example 5: Cleaning Test (2) 0.5 g of mineral oil, fluorine oil or silicone oil was weighed into a disposable glass test tube (straight mouth, capacity 10 mL). 3 g of the solvent composition of each Example and Comparative Example was placed in the test tube, and the tube was covered with a rubber stopper and shaken about 20 times to mix. After leaving it to stand for 10 minutes, the state of the composition was confirmed. ◎: No phase separation, transparent mixture ○: No phase separation, cloudy mixture △: Phase separation occurred and some parts became cloudy ×: No white turbidity, phase separation

[0112] The results are summarized in the following Tables 1 to 7. In the tables, "-" indicates that the test was not performed.

[0113] [Table 1]

[0114] [Table 2]

[0115] [Table 3]

[0116] [Table 4]

[0117] [Table 5]

[0118] [Table 6]

[0119] [Table 7]

[0120] The following can be seen from Tables 1 to 7. The results of Test Examples 1 and 2 show that the steam cleaning compositions of the Examples reduced damage to substrates even when used for steam cleaning. The results of Test Example 4 show that the steam cleaning compositions of the Examples have excellent cleaning properties for silicone oil. Also, the results of Test Example 4 show that the steam cleaning compositions of the Examples have excellent cleaning properties for high-viscosity oils and oily stains. The results of Test Example 5 show that the steam cleaning compositions of the Examples had excellent cleaning properties even when a large amount of silicone oil was to be dissolved. Comparing Examples 1 to 62 with Examples 63 to 68, it can be said that when the total amount of components (A), (B), (C) and (D) was 100 parts by weight, and the content of component (D) was 20 to 40 parts by weight, the cleaning ability for silicone oil was excellent.

[0121] In Comparative Examples 30 to 41 and 48 to 51, the amount of component (A) was 50 parts by weight or more when the total amount of components (A), (B), and (C) was 100 parts by weight, and therefore the substrate was damaged by steam cleaning. In Comparative Examples 26 to 27 and 40 to 43, the amount of component (B) was more than 85 parts by weight when the total amount of components (B) and (C) was 100 parts by weight, and therefore the cleaning ability with silicone oil was poor. In Comparative Examples 26 to 29, 44 to 47, and 52 to 53, the total amount of the components (A) and (D) was less than 40 parts by weight when the total amount of the components (A), (B), (C) and (D) was 100 parts by weight, and therefore the cleaning ability with silicone oil was poor. [Explanation of symbols]

[0122] 1 steam cleaning composition, 2 steam component, 11 boiling tank, 21 cooling pipe, 22 gutter, 23 water separator, 24 heater, S object to be cleaned, S1, S2, S4, S5 object to be cleaned

Claims

1. (A) a hydrofluoroolefin; (B) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether; (C) one or more compounds selected from the group consisting of methyl nonafluorobutyl ether and methyl nonafluoroisobutyl ether; and (D) a hydrocarbon; the amount of the component (A) is more than 0 parts by weight and less than 50 parts by weight when the total amount of the components (A), (B), and (C) is 100 parts by weight, the amount of the component (B) is more than 0 parts by weight and not more than 85 parts by weight when the total amount of the components (B) and (C) is 100 parts by weight, A steam cleaning composition used for cleaning including a step of generating steam, wherein the total amount of the components (A) and (D) is 40 parts by weight or more and less than 100 parts by weight, when the total amount of the components (A), (B), (C) and (D) is 100 parts by weight.

2. 2. The steam cleaning composition of claim 1, wherein component (A) is cis-1-chloro-3,3,3-trifluoropropene.

3. 3. The steam cleaning composition according to claim 1, wherein component (D) is at least one compound selected from the group consisting of isohexane, isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane, decane, and dodecane.

4. 3. The steam cleaning composition according to claim 1, wherein the total amount of the components (A), (B), (C) and (D) is 85 parts by weight or more and 100 parts by weight or less, based on 100 parts by weight of the entire composition.

5. 4. The steam cleaning composition according to claim 3, wherein the total amount of components (A), (B), (C) and (D) is 85 parts by weight or more and 100 parts by weight or less, based on 100 parts by weight of the entire composition.

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