Cleaning solvent composition

Abstract

The present invention provides a cleaning solvent composition that offers excellent drying properties, minimizes damage to the substrate, and provides high cleaning performance and safety. [Solution] The present invention provides a cleaning solvent composition comprising one or more solvents (A) selected from the group consisting of (a-1) propylene glycol monomethyl ether and (a-2) 1-propanol, and one or more solvents (B) selected from the group consisting of (b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether and (b-3) methyl nonafluoroisobutyl ether, wherein when the total of (A) and (B) is 100 parts by weight, the content of (A) is 15 parts by weight or more and 92 parts by weight or less, where the content of (A) is 73 parts by weight or more and 92 parts by weight or less. The present invention relates to a cleaning solvent composition comprising (ii) further comprising (c-1) one or more solvents (C) selected from the group consisting of hydrofluoroolefins, a cleaning agent for cleaning objects to be cleaned to which one or more substances selected from the group consisting of oily stains, oil, flux, uncured resin and dust are attached, and a cleaning agent for wiping, a cleaning agent for brushing, a cleaning agent for rinsing, or an ultrasonic immersion cleaning agent using the cleaning solvent composition.

Description

Technical Field

[0001] The present invention relates to a solvent composition for cleaning.

Background Art

[0002] Glycol ethers and alcohols are excellent in degreasing power, and are used as non-flammable cleaning agents in combination with fluorine-based solvents. Also, as non-flammable industrial cleaning agent compositions, mixtures of an alkyl ether of dipropylene glycol or diethylene glycol and a fluorine-based non-flammable solvent (Patent Documents 1 and 2), a mixture of 1-propanol, propylene glycol monomethyl ether, and a fluorine-based non-flammable solvent (Patent Document 3) are known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, cleaning agents containing alkyl ethers of dipropylene glycol or diethylene glycol, as described in Patent Documents 1 and 2, had the problem of poor drying properties. This was particularly problematic when used as a hand towel cleaning agent, as they are usually air-dried without vacuum drying, hot air drying, or steam drying. In addition, alcohols, as described in Patent Document 3, had the problem of flammability. Furthermore, some fluorine-based solvents caused problems in terms of damaging substrates such as elastomers and resins. Therefore, the object of the present invention is to provide a cleaning solvent composition that has excellent drying properties, minimizes damage to substrates, and has high cleaning properties and safety.

[0005] The present invention has the following configuration. [1] One or more solvents (A) selected from the group consisting of (a-1) propylene glycol monomethyl ether and (a-2) 1-propanol, A cleaning solvent composition comprising (b-1) one or more solvents (B) selected from the group consisting of (b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether, and (b-3) methyl nonafluoroisobutyl ether, When the sum of (A) and (B) is 100 parts by weight, A cleaning solvent composition in which the content of (A) is 15 parts by weight or more and 92 parts by weight or less, and where the content of (A) is 73 parts by weight or more and 92 parts by weight or less, if the content of (A) is x1 and the total content of (b-2) and (b-3) is y1, then 100-x1≧y1≧(x1-73)×8÷19 is satisfied. [2] The cleaning solvent composition of [1], wherein (B) is (b-1)1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, and when the total of (A) and (B) is 100 parts by weight, (A) is 15 parts by weight or more and 73 parts by weight or less. [3] The cleaning solvent composition of [2], wherein when the total of (A) and (B) is 100 parts by weight, (A) is 30 parts by weight or more and 73 parts by weight or less. [4] The cleaning solvent composition of [1], wherein (B) is one or more solvents selected from the group consisting of (b-2) methyl nonafluorobutyl ether and (b-3) methyl nonafluoroisobutyl ether, and when the total of (A) and (B) is 100 parts by weight, (A) is 15 parts by weight or more and 92 parts by weight or less. [5] The cleaning solvent composition of [4], wherein when the total of (A) and (B) is 100 parts by weight, (A) is 30 parts by weight or more and 92 parts by weight or less. [6] A solvent composition of any of [1] to [5], wherein the sum of (A) and (B) is 55 parts by weight or more when the total amount of the cleaning solvent composition is 100 parts by weight. [7] One or more solvents (A) selected from the group consisting of (a-1) propylene glycol monomethyl ether and (a-2) 1-propanol, (b-1) One or more solvents (B) selected from the group consisting of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether, and (b-3) methyl nonafluoroisobutyl ether, (c-1) One or more solvents (C) selected from the group consisting of hydrofluoroolefins and A cleaning solvent composition containing the following: [8] A cleaning solvent composition of [7] wherein (C) is one or more solvents selected from the group consisting of cis-1-chloro-3,3,3-trifluoropropene, (E)-1-chloro-2,3,3-trifluoropropene, (Z)-1-chloro-2,3,3-trifluoropropene, 2-bromo-3,3,3-trifluoro-1-propene, 1,1-dichloro-3,3,3-trifluoropropene, 1,2-dichloro-3,3,3-trifluoropropene, and 1-chloro-1,3,3-trifluoropropene. [9] When the sum of (A), (B), and (C) is 100 parts by weight, The content of (C) is 45 parts by weight or less, A cleaning solvent composition according to [7] or [8], wherein the content of (A) and (C) is 15 parts by weight or more and 92 parts by weight or less, and where the content of (A) is more than 73 parts by weight and less than 92 parts by weight, if the total content of (A) is x2 and the total content of (b-2) and (b-3) is y2, then 100-x2>y2>(x2-73)×8÷19 is satisfied.

[10] A solvent composition of any of [7] to [9], wherein the sum of (A), (B), and (C) is 60 parts by weight or more when the total amount of the cleaning solvent composition is 100 parts by weight.

[11] A cleaning solvent composition from any of [1] to

[10] , which is a cleaning agent for cleaning an object to be cleaned to which one or more substances selected from the group consisting of oily stains, oil, flux, uncured resin, and dust are attached.

[12] A cleaning solvent composition according to any of [1] to

[11] , which is one or more selected from the group consisting of a wiping agent, a brush cleaning agent, a rinsing agent, and an ultrasonic immersion cleaning agent. A cleaning method comprising using any of the cleaning solvent compositions

[13] to

[12] to clean the surface of an object to be cleaned by wiping, brushing, rinsing, or ultrasonic immersion cleaning.

[0006] Furthermore, the present invention may also have the following configurations. [1a] A cleaning solvent composition comprising (a-1) propylene glycol monomethyl ether and (b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, wherein when the total of (a-1) and (b-1) is 100 parts by weight, (a-1) is present in an amount of 15 parts by weight or more and 73 parts by weight or less. [2a] A cleaning solvent composition of [1a], wherein when the sum of (a-1) and (b-1) is 100 parts by weight, (a-1) is 30 parts by weight or more and 73 parts by weight or less. [3a] The cleaning solvent composition according to [1a] or [2a], wherein the sum of (a-1) and (b-1) is 80 parts by weight or more when the total amount of the cleaning solvent composition is 100 parts by weight. [4a] A cleaning solvent composition of any of [1a] to [3a], which is a cleaning agent for cleaning an object to be cleaned to which one or more substances selected from the group consisting of oily stains, oil, flux, uncured resin, and dust are attached. [5a] A cleaning solvent composition of any of [1a] to [4a], which is a cleaning agent for wiping. A cleaning method comprising cleaning the surface of an object to be cleaned by wiping it with any of the cleaning solvent compositions [6a], [1a], to [5a]. [Effects of the Invention]

[0007] The present invention provides a cleaning solvent composition that exhibits excellent drying properties, minimizes damage to the substrate, and offers high cleaning performance and safety. [Modes for carrying out the invention]

[0008] (Definition of terms) "(a-1) Propylene glycol monomethyl ether" is sometimes referred to as "(a-1)" or "(a-1) component." The same applies to other components such as "(b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether." Regarding numerical ranges, "~" means that the values ​​at both ends are included. That is, "15~73 parts by weight" means "15 parts by weight or more and 73 parts by weight or less". Also, "or less" means "the same or less", and "or more" means "the same or greater than".

[0009] [First cleaning solvent composition] The first cleaning solvent composition (hereinafter also simply referred to as the "cleaning solvent composition" until the description of the "second cleaning solvent composition") comprises one or more solvents (A) selected from the group consisting of (a-1) propylene glycol monomethyl ether and (a-2) 1-propanol, and (b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether and (b-3) methyl nonafluorobutyl ether. The solution comprises one or more solvents (B) selected from the group consisting of nafluoroisobutyl ether, where the total of (A) and (B) is 100 parts by weight, and the content of (A) is 15 parts by weight or more and 92 parts by weight or less. If the content of (A) is 73 parts by weight or more and 92 parts by weight or less, then let the content of (A) be x1 and the total content of (b-2) and (b-3) be y1, then the condition 100-x1≧y1≧(x1-73)×8÷19 is satisfied.

[0010] <Solvent (A)> Solvent (A) is one or more components selected from the group consisting of (a-1) propylene glycol monomethyl ether and (a-2) 1-propanol. Component (A) is the main component of the cleaning solvent composition. Component (a-1) is monopropylene glycol monomethyl ether. Component (a-1) is also called 1-methoxy-2-propanol. According to the inventors' findings, among glycol ethers, propylene glycol monomethyl ether was found to have superior drying properties, cleaning properties, and safety. Furthermore, according to the inventors' findings, among alcohols, 1-propanol was found to have superior drying properties, cleaning properties, and safety.

[0011] <Solvent (B)> The solvent (B) is one or more components selected from the group consisting of (b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether, and (b-3) methyl nonafluoroisobutyl ether. The component (B) is the main component of the cleaning solvent composition. The component (b-1) is also called 1,1,2,2-tetrafluoro-1-(2,2,2-trifluoroethoxy)ethane, HFE-347pc-f. According to the findings of the inventors, among fluorinated solvents, when one or more components selected from the group consisting of (b-1), (b-2), and (b-3) are used, it has been found that the damage to the substrate can be suppressed. In this specification, "the damage to the substrate can be suppressed" means that, at least, the damage to nitrile rubber and polycarbonate resin can be suppressed, preferably, the damage to elastomers and resins can be suppressed, and particularly preferably, the damage to the substrates described below can be suppressed. Also, according to the findings of the inventors, among fluorinated solvents, when one or more components selected from the group consisting of (b-1), (b-2), and (b-3) are used, the flash point is not detected, and when mixed with the component (A) to form a composition, it has been found that a composition having excellent stability at low temperatures can be obtained.

[0012] <Components other than solvent (A) and solvent (B)> The cleaning solvent composition can contain components other than the component (A) and the component (B) as long as the effects of the present invention are not impaired. Such components can include (c-1) one or more solvents (C) selected from the group consisting of hydrofluoroolefins, (D) further components, and (E) additives. Here, the (D) further components and the (E) additives are not the solvents (A) to (C).

[0013] ≪Solvent (C)≫ The solvent (C) is one or more components selected from the group consisting of (c-1) hydrofluoroolefins. The solvent (C) is a component that can replace part of the component (A) and / or the component (B) (preferably the component (b-1)). The (c-1) hydrofluoroolefin is a halogenated fluoroolefin compound that may contain one or more atoms selected from the group consisting of chlorine atoms and bromine atoms. Examples of the (c-1) component include cis-1-chloro-3,3,3-trifluoropropene (HCFO-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, 1,2-dichloro-3,3,3-trifluoropropene, 1-chloro-1,3,3-trifluoropropene, and the like. The (c-1) component is preferably cis-1-chloro-3,3,3-trifluoropropene, (E)-1-chloro-2,3,3-trifluoropropene, or (Z)-1-chloro-2,3,3-trifluoropropene. Commercially available products of the (c-1) component include CELEFIN (registered trademark) 1233Z (HCFO-1233zd(Z)) (manufactured by Central Glass Co., Ltd.), AMOLEA (registered trademark) AS-300 (manufactured by AGC Inc.) ((E)-1-chloro-2,3,3-trifluoropropene (HCFO-1233yd(E)), (Z)-1-chloro-2,3,3-trifluoropropene (HCFO-1233yd(Z)), and a mixture of stabilizers)), and the like.

[0014] <<(D) Further Component>> (D) Further components include (d-1) nitro compounds, (d-2) ethers, (d-3) esters (excluding (d-2) ethers), (d-4) alcohols (excluding (d-2) ethers), (d-5) amide compounds, (d-6) chloroolefins, (d-7) hydrobromocarbons, (d-8) hydrofluorocarbons, (d-9) hydrofluoroethers, (d-10) hydrocarbons, and (d-11) chlorinated hydrocarbons (excluding (d-6) chloroolefins and (d-10) hydrocarbons).

[0015] ≪(d-1) Nitro Compounds≫ (d-1) The nitro compound is not particularly limited as long as it is a compound having one or more nitro groups in its molecule. (d-1) Examples of components include nitromethane, nitroethane, 1-nitropropane, 2-nitropropane, and other nitroalkanes.

[0016] ≪(d-2) Ether≫ (d-2) The ether is an ether-based solvent containing carbon atoms, hydrogen atoms, and ether bonds (-O-), and may be linear or branched, and cyclic or acyclic. Note that component (d-2) includes glycol ethers. (d-2)Specific examples of components include dipropyl ether, diisopropyl ether, tetrahydrofuran, methyltetrahydrofuran, 4-methyltetrahydropyran, 1,4-dioxane, 1,3-dioxolane, diethyl ether, diisobutyl ether, dibutyl ether, methyl tert-butyl ether, methyl cellosolve, ethyl cellosolve, isopropyl cellosolve, 1,2-butylene oxide, epichlorohydrin, propylene oxide, cyclohexene oxide, cyclopentene oxide, pentene oxide, heptene oxide, octen 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, Ethylene glycol monobutyl 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, dipropylene glycol, diethylene glycol, tripropylene glycol, diethylene glycol monobutyl ether, monoethylene glycol dimethyl ether (monoglym), diethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol diethyl ether,Examples 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.

[0017] ≪(d-3) Esters (excluding (d-2) ethers)≫ Examples of (d-3) esters (excluding (d-2) ethers) include monoester solvents, ester solvents having two carbonyl groups, carbonate ester solvents, and cyclic ester solvents. Specific examples of (d-3) components include methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, butyl acetate, sec-butyl acetate, methoxybutyl acetate, amyl acetate, soybean fatty acid methyl ester, methyl lactate, ethyl lactate, propyl lactate, dibasic acid ester (DBE), ethyl acetoethyl acetate, γ-butyrolactone, dimethyl carbonate, diethyl carbonate, ethylmethyl carbonate, dimethyl oxalate, and diethyl oxalate.

[0018] ≪(d-4) alcohols (excluding (d-2) ethers)≫ Examples of (d-4) alcohols (excluding (d-2) ethers) include monoalcohol solvents and glycol solvents. Specific examples of component (d-4) include ethanol, methanol, isopropyl alcohol, 1-butanol, isobutyl alcohol, tertiary butanol, secondary butyl alcohol, benzyl alcohol, diacetone alcohol, 2-propyne-1-ol, 2-ethylhexanol, ethylene glycol, and diethylene glycol.

[0019] ≪(d-5) Amide Compounds≫ (d-5) Amide compounds are cyclic or acyclic compounds having an amide bond. Examples of (d-5) components include N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, 2-pyrrolidone, 3-methoxy-N,N-dimethylpropanamide, 3-butoxy-N,N-dimethylpropanamide, dimethylformamide, dimethylacetamide, and dimethylacetacetamide.

[0020] ≪(d-6) Chloroolefin≫ (d-6) Chloroolefins are olefin compounds that contain carbon atoms and chlorine atoms, and may also contain hydrogen atoms. Examples of (d-6) components include hydrochloroolefins containing hydrogen atoms, such as trans-1,2-dichloroethylene and trichloroethylene, and tetrachloroethylene (perchloroethylene) which does not contain hydrogen atoms.

[0021] ≪(d-7) Hydrobromocarbon≫ (d-7) Hydrobromocarbons are compounds consisting only of carbon atoms, bromine atoms, and hydrogen atoms. (d-7) Examples of components include n-propyl bromide (1-bromopropane) and isobutyl bromide.

[0022] ≪(d-8) Hydrofluorocarbon≫ (d-8) Hydrofluorocarbons (HFCs) are compounds consisting only of carbon atoms, fluorine atoms, and hydrogen atoms, and do not have carbon-carbon double bonds. Examples of (d-8) components include 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, 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorohexane, and 1,1,1,2,2,3,4,5,5,5-decafluoropentane (HFC-43-10mee). (d-8) Commercial products of component (d-8) include Solcan® 365mfc (manufactured by Solvay Japan Ltd.) for 1,1,1,3,3-pentafluorobutane, and Zeolora® H (manufactured by Zeon Corporation) for 1,1,2,2,3,3,4-heptafluorocyclopentane.

[0023] ≪(d-9) Hydrofluoroether≫ (d-9) Hydrofluoroethers (HFEs) are compounds containing carbon atoms, fluorine atoms, hydrogen atoms, and ether bonds (-O-). Examples of (d-9) components 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, and methyl perfluoropropyl ether.

[0024] ≪(d-10) Hydrocarbons≫ (d-10) A hydrocarbon is a hydrocarbon solvent consisting only of carbon and hydrogen, which may be linear or branched, cyclic or acyclic, and which may have a carbon-carbon double bond. (d-10) Examples of components include pentane, isopentane, cyclopentane, hexane, isohexane, cyclohexane, n-heptane, isoheptane, cycloheptane, n-octane, isooctane, cyclooctane, nonane, isononane, cyclononane, decane, isodecane, 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, naphthenes, aromatic hydrocarbons, etc. Hydrocarbon solvents may be synthetic compounds.

[0025] ≪(d-11) Chlorinated hydrocarbons (excluding (d-6) chloroolefins and (d-10) hydrocarbons)≫ (d-11) Chlorinated hydrocarbons (excluding (d-6) chloroolefins and (d-10) hydrocarbons) are hydrocarbon solvents containing chlorine atoms and carbon atoms, and may also contain hydrogen atoms. Examples of (d-11) components include methylene chloride.

[0026] (D) Further components may be one or a combination of two or more. Component (D) may not contain (d-2) ether and (d-9) hydrofluoroether, nor may it contain (d-4) alcohol and (d-9) hydrofluoroether. Furthermore, component (D) may not contain (d-8) hydrofluorocarbon.

[0027] <<(E) Additives>> (E) Additives are not particularly limited as long as they are components other than component (D) and are commonly used in the field of cleaning solvent compositions. Examples of (E) additives include one or more selected from the group consisting of water, ultraviolet absorbers, antioxidants, rust inhibitors, defoamers, surfactants, and chelating agents. Component (D) acting as component (E) shall be included in component (E).

[0028] UV absorbers and antioxidants are components that improve the stability of cleaning solvent compositions during long-term storage. Examples of UV absorbers include benzotriazole-based UV absorbers, benzophenone-based UV absorbers, and hindered amine-based UV absorbers. Examples of antioxidants include phenol-based antioxidants, amine-based antioxidants, sulfur-based antioxidants, and phosphorus-based antioxidants.

[0029] Phenolic antioxidants, 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-diethylenebis[3-( Examples include 3,5-di-t-butyl-hydroxyphenyl)propionate, octadodecyl-3-[3,5-di-t-butyl-4-hydroxyphenyl]propionate, N,N-hexamethylenebis(3,5-di-t-butyl-4-hydroxyhydrocinnamide), 3,5-di-t-butyl-4-hydroxybenzylphosphonate-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, 4-methoxyphenol, and methylhydroquinone.

[0030] Examples of amine-based antioxidants 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, pentaerythrityltetrakis(3-laurylthiopropionate), ditridecyl-3,3-thiodipropionate, 2-mercaptobenzimidazole, and bis[2-methyl-4-(3-n-alkylthiopropionyloxy)-5-t-butylphenyl]sulfide. Examples of phosphorus-based antioxidants include tris-nonylphenyl phosphite, triphenyl phosphite, tris(2,4-di-t-butylphenyl) phosphite, and tris(isodecyl) phosphite.

[0031] Examples of chelating agents include aminocarboxylic acid-based chelating agents, with hydroxyethylaminoacetic acid, hydroxyethyliminodiacetic acid, ethylenediaminetetraacetic acid, and their salts being preferred.

[0032] Rust inhibitors include cyclohexylamine, dicyclohexylamine, and N,N-bis(2-hydroxyethyl)-N-cyclohexylamine. Suitable surfactants include nonionic surfactants, such as 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-based surfactants, and fluorine-based surfactants.

[0033] Other additives besides those listed above are not particularly limited and can be used as appropriate, as long as they are components commonly used in the field of cleaning solvent compositions. (E) Each additive may be one type or a combination of two or more types.

[0034] <Composition of cleaning solvent composition> In a cleaning solvent composition, when the total of (A) and (B) is 100 parts by weight, the content of (A) is 15 parts by weight or more and 92 parts by weight or less. If the content of (A) is 73 parts by weight or more and 92 parts by weight or less, then if the content of (A) is x1 and the total content of (b-2) and (b-3) is y1, then equation (1): 100 - x1 ≥ y1 ≥ (x1 - 73) × 8 ÷ 19 is satisfied.

[0035] Therefore, if (B) is component (b-1), then when the total of (A) and (B) is 100 parts by weight, (A) can be between 15 parts by weight and 73 parts by weight. Also, if (B) is component (b-2) and / or component (b-3), then when the total of (A) and (B) is 100 parts by weight, (A) can be between 15 parts by weight and 92 parts by weight. For this reason, formula (1) is based on the total content of component (A) and component (b-2) and / or component (b-3), which can produce an effect even when the content of component (A) is high. Note that the content of (b-1) is arbitrary as long as y1, which is the total content of (b-2) and (b-3) as described above, satisfies the relationship in formula (1). That is, if the content of (b-1) is y1', then y1' satisfies 100 - (x1 + y1) ≥ y1' ≥ 0.

[0036] When the sum of (A) and (B) is 100 parts by weight, if (A) is less than 15 parts by weight, the cleaning performance is poor. Also, if the content of (A) exceeds 92 parts by weight, the drying performance is poor and safety is poor because the flash point can be detected. Furthermore, when the content of (A) is between 73 parts by weight and 92 parts by weight, if y1, which is the total content of component (b-2) and / or component (b-3), is less than (x1-73)×8÷19, the content of (A) is relatively large, resulting in poor drying performance and safety because the flash point can be detected.

[0037] When the total of (A) and (B) is 100 parts by weight, (A) is preferably 30 parts by weight or more and 73 parts by weight or less, and particularly preferably 30 parts by weight or more and 68 parts by weight or less. In these cases, the cleaning solvent composition has better drying properties and higher cleaning properties and safety.

[0038] If (A) is component (a-1), when the total of (A) and (B) is 100 parts by weight, from the viewpoint of wipe-cleanability, it is preferable that (A) is 30 parts by weight or more, and particularly preferable that it is 45 parts by weight or more, and from the viewpoint of drying properties, it is preferable that it is 73 parts by weight or less, preferably 68 parts by weight or less, and particularly preferable that it is 45 parts by weight or less. Furthermore, if (A) is component (a-2), when the total of (A) and (B) is 100 parts by weight, from the viewpoint of wipe-cleanability, it is preferable that (A) is 60 parts by weight or more, and from the viewpoint of drying properties, it is preferable that it is 60 parts by weight or less. If (B) is component (b-1), then when the total of (A) and (B) is 100 parts by weight, it is preferable that (A) is 30 parts by weight or more and 73 parts by weight or less, and particularly preferable that it is 30 parts by weight or more and 68 parts by weight or less. Also, if (B) is component (b-2) and / or component (b-3), then when the total of (A) and (B) is 100 parts by weight, it is preferable that (A) is 30 parts by weight or more and 92 parts by weight or less, and particularly preferable that it is 30 parts by weight or more and 60 parts by weight or less.

[0039] From the viewpoint of achieving superior effectiveness as a cleaning solvent composition, when the total amount of the cleaning solvent composition is 100 parts by weight, the sum of (A) and (B) is preferably 55 parts by weight or more, more preferably 60 parts by weight or more, even more preferably 80 parts by weight or more, even more preferably 85 parts by weight or more, and particularly preferably 90 parts by weight or more.

[0040] When the total amount of the cleaning solvent composition is 100 parts by weight, the sum of (C), (D), and (E) is preferably 45 parts by weight or less, more preferably 40 parts by weight or less, even more preferably 30 parts by weight or less, and particularly preferably 20 parts by weight or less. The amount of (C) is not particularly limited as long as it does not exceed the total amount of (C), (D), and (E) as described above, and may be 45 parts by weight or less, 40 parts by weight or less, 10 parts by weight or less, or 5 parts by weight or less. The respective contents of (D) and (E) are not particularly limited as long as they do not exceed the total contents of (C), (D), and (E) as described above, and may be 40 parts by weight or less, 20 parts by weight or less, 10 parts by weight or less, or 5 parts by weight or less. Within this range, the cleaning solvent composition exhibits superior effectiveness.

[0041] [Second cleaning solvent composition] The second cleaning solvent composition comprises one or more solvents (A) selected from the group consisting of (a-1) propylene glycol monomethyl ether and (a-2) 1-propanol, one or more solvents (B) selected from the group consisting of (b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether and (b-3) methyl nonafluoroisobutyl ether, and one or more solvents (C) selected from the group consisting of (c-1) hydrofluoroolefin.

[0042] In the second cleaning solvent composition, component (C) together with components (A) and (B) constitutes the main component of the cleaning solvent composition. Component (C) is a component that may have the functions of component (A) and / or component (B). The second cleaning solvent composition may contain components other than components (A), (B), and (C) to the extent that it does not impair the effects of the present invention. Such components include (D) further components and (E) additives. Herein, components (A) to (E) are as described above in the first cleaning solvent composition, including in preferred embodiments.

[0043] <Composition of the second cleaning solvent composition> In the second cleaning solvent composition, the content of each component is preferably as follows: In the second cleaning solvent composition, when the total of (A), (B), and (C) is 100 parts by weight, it is preferable that the content of (C) is 45 parts by weight or less, and the content of (A) and (C) is 15 parts by weight or more and 92 parts by weight or less, where if the content of (A) is more than 73 parts by weight and less than 92 parts by weight, then the content of (A) is x2, and the total content of (b-2) and (b-3) is y2, and the equation (2): 100-x2>y2>(x2-73)×8÷19 is satisfied.

[0044] Therefore, if (B) is component (b-1), the content of (A) may be more than 15 parts by weight and 73 parts by weight or less when the total of (A), (B), and (C) is 100 parts by weight. Also, if (B) is component (b-2) and / or component (b-3), the content of (A) may be more than 15 parts by weight and 92 parts by weight or less when the total of (A), (B), and (C) is 100 parts by weight. For this reason, formula (2) is based on the content of component (A) and the total content of component (b-2) and / or component (b-3) that can efficiently achieve the effects of the present invention even when the content of component (A) is high. Note that the content of component (b-1) and component (C) is arbitrary as long as y2, which is the total content of (b-2) and (b-3) as described above, satisfies the relationship in formula (1). That is, if the content of (b-1) is y2' and the content of (C) is z2, then y2' satisfies 100-(x2+y2)≧y2'+z2>0.

[0045] When the sum of (A), (B), and (C) is 100 parts by weight, if the total content of (A) and (C) is 15 parts by weight or more, the cleaning properties tend to be superior. Also, if the total content of (A) and (C) is 92 parts by weight or less, the drying properties tend to be superior and the safety properties tend to be superior. Furthermore, when the content of (A) is 73 parts by weight or more and 92 parts by weight or less, if the total content of component (b-2) and / or component (b-3), y2, is (x2-73)×8÷19 or more, the total content of (A) is relatively low, so the drying properties tend to be superior and the safety properties tend to be superior.

[0046] If (B) is component (b-1), then when the total of (A), (B), and (C) is 100 parts by weight, the combined content of (A) and (C) is preferably 30 parts by weight or more and 75 parts by weight or less, and particularly preferably 30 parts by weight or more and 60 parts by weight or less. Furthermore, if (B) is component (b-2) and / or component (b-3), then when the total of (A), (B), and (C) is 100 parts by weight, the combined content of (A) and (C) is preferably 30 parts by weight or more and 92 parts by weight or less, and particularly preferably 30 parts by weight or more and 60 parts by weight or less. Furthermore, the content of components (A) and (C) is arbitrary within a range, provided that the upper limit of the content of (C) and the sum of the contents of (A) and (C) are satisfied. When the sum of (A), (B), and (C) is 100 parts by weight, the content of component (A) is preferably 5 parts by weight or more. Also, when the sum of (A), (B), and (C) is 100 parts by weight, the content of (C) is preferably 5 parts by weight or more, and particularly preferably 8 parts by weight or more. In these cases, the second cleaning solvent composition exhibits superior drying properties, as well as enhanced cleaning performance and safety.

[0047] When component (C) is cis-1-chloro-3,3,3-trifluoropropene, it is preferable that the content of (C) is 45 parts by weight or less when the total of (A), (B), and (C) is 100 parts by weight. In addition, in the above case, from the viewpoint of wipe-cleanability, drying properties, etc., it is preferable that (B) is (b-1) and (A) is a combination of (a-1) and (a-2), and it is particularly preferable that the content of (a-1) is 30 parts by weight or more and 75 parts by weight or less when the total of (a-1) and (a-2) is 100 parts by weight. If component (C) is one or more selected from the group consisting of (E)-1-chloro-2,3,3-trifluoropropene and (Z)-1-chloro-2,3,3-trifluoropropene, then when the total of (A), (B), and (C) is 100 parts by weight, the content of (C) is preferably 30 parts by weight or less, more preferably 20 parts by weight or less, and particularly preferably 15 parts by weight or less.

[0048] From the viewpoint of achieving superior effectiveness as a cleaning solvent composition, when the total amount of the second cleaning solvent composition is 100 parts by weight, the sum of (A), (B), and (C) is preferably 60 parts by weight or more, more preferably 70 parts by weight or more, even more preferably 80 parts by weight or more, even more preferably 85 parts by weight or more, and particularly preferably 90 parts by weight or more.

[0049] The respective contents of (D) and (E) are as described above for the first cleaning solvent composition.

[0050] [Method for producing a cleaning solvent composition] The method for producing the cleaning solvent composition (hereinafter, including the first cleaning solvent composition and the second cleaning solvent composition) is arbitrary. The raw material components contained in the cleaning solvent composition can be produced by appropriately selecting known methods, for example, by performing one or more means selected from the group consisting of stirring, mixing, dissolving, and dispersion.

[0051] [Analysis method for each component of cleaning solvent composition] The content of each component in the cleaning solvent composition can be measured by conventional quantitative analytical methods for organic compounds, such as gas chromatography (GC) or gas chromatography-mass spectrometry (GC / MS).

[0052] [Uses of cleaning solvent compositions] Because the cleaning solvent composition exhibits excellent solubility for oil, flux, and / or uncured resin, it can be used as a cleaning agent for cleaning objects to be cleaned that are contaminated with one or more substances selected from the group consisting of oily stains, oil, flux, and uncured resin. Furthermore, because the cleaning solvent composition exhibits excellent drying properties, it can be used as a cleaning agent for cleaning objects to be cleaned that are contaminated with dust.

[0053] <<oil>> Examples of oils include mineral oils, vegetable oils, animal oils, heavy oils, waxes, silicone oils, and fluorinated oils. These oils may be used, for example, as cutting oils, pressing oils, drawing oils, heat treatment oils, rust-preventive oils, lubricating oils, metalworking oils, greases, asphalt, and water-soluble oils.

[0054] There are no particular restrictions on mineral oils, and a commercially available example is Pulley SF Oil (manufactured by Idemitsu Kosan Co., Ltd.). Examples of vegetable oils include olive oil, linseed oil, tuni oil, sesame oil, safflower oil, soybean oil, castor oil, cottonseed oil, coconut oil, corn oil, and dehydrated castor oil. The fatty acids that make up vegetable oils are saturated or unsaturated fatty acids of C12 to C18, specifically including 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 pine resin. Examples of waxes include plant-based, animal-based, petroleum-based, and synthetic hydrocarbon-based waxes.

[0055] Silicone oil has a main skeleton consisting of siloxane bonds. The silicone oil may be a straight silicone oil such as dimethyl silicone oil, methylphenyl silicone oil, or methyl hydrogen silicone oil. Alternatively, it may be a modified silicone oil in which other organic groups such as carboxyl groups, amino groups, polyether groups, acrylic groups, or epoxy groups are introduced to the side chains or terminals of the polysiloxane. Specific examples of such silicone oils include dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and polyoxyethylene-methylpolysiloxane. Commercially available examples of such silicone oils 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 also contain further atoms such as halogens like chlorine and bromine, phosphorus, sulfur, and nitrogen. Examples of commercially available fluorine oils include Fomblin Y-LVAC, Y-HVAC, Y04, and YR from Solvay Specialty Polymers Japan Co., Ltd.; Barrierta J100 fluid, Barrierta J25 fluid, Barrierta J400 fluid, Barrierta J25V, Barrierta SJ07, Barrierta SJ15, and Barrierta SJ30 from NOK Klüber Co., Ltd.; Krytox 1506, Krytox 1514, and Krytox 1525 from Chemors; and Demnam S-20 from Daikin Industries, Ltd.

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

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

[0059] Furthermore, flux may be supplied in the form of solder paste, in which the soldering metal and rosin flux are combined. Solder paste is a composition containing solder alloy powder, resin, activator, antioxidant, thixotropic agent, and solvent, and consists of so-called metal powder and flux components.

[0060] <<Resin>> The resin used in the uncured resin is not particularly limited and includes 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 (TDI) and diphenylmethane diisocyanate (MDI) with polyols such as polypropylene glycol. When the urethane resin is in foam form, it may be a flexible foam, semi-rigid foam, or rigid foam. Examples of additives blended into the urethane resin include curing agents, curing accelerators, emulsifiers, foaming agents, stabilizers, plasticizers, flame retardants, antistatic agents, colorants, foldability modifiers, and impact resistance modifiers. Cured urethane resins are used as thermal insulation materials and coatings for electronic circuit boards, etc.

[0062] Examples of epoxy resins include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol AD ​​type epoxy resin, polyglycidyl ethers of polyhydric alcohols, polyglycidyl esters of polybasic acids, 3,4-epoxycyclohexyl-3',4'-epoxycyclohexanecarboxylate, vinylcyclohexene diepoxide, cresol novolac type epoxy resin, and epoxy resins having a hydantoin ring. Examples of additives blended into epoxy resins include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, antistatic agents, foldability modifiers, impact resistance modifiers, and reaction diluents.

[0063] Any of the commonly used epoxy resin curing agents may be used, such as novolacs including phenol novolac, biphenol-type novolac, and bisphenol A-type novolac; acid anhydrides such as phthalic anhydride, pyromellitic anhydride, and benzophenonetetracarboxylic anhydride; amines such as diaminodiphenylmethane, diaminodiphenylsulfone, metaphenylenediamine, and hexamethylenetetramine; and amide resins such as polyamidoamine. Examples of curing accelerators include tertiary amines or organophosphorus compounds. The cured epoxy resin is used in adhesives, potting agents for electronic circuit boards, and the like.

[0064] Examples of acrylic resins include compounds having an acryloyl group and / or a methacryloyl group, specifically methyl (meth)acrylate and 2-hydroxyethyl (meth)acrylate. Here, (meth)acrylate means at least one of acrylate and methacrylate. It is preferable that the acrylic resin does not contain fluorine atoms, and it is particularly preferable that it does not contain halogen atoms. Examples of additives blended into the acrylic resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, electrostatic imparters, foldability modifiers, impact resistance modifiers, and reaction diluents. Because acrylic resins have good processability and excellent transparency, cured acrylic resins are used in windshields, windows for aircraft, ships, and automobiles, aquariums, lenses, lighting fixtures, displays, signs, etc.

[0065] Polystyrene resin is a polymer with styrene as the monomer, and its cured product is also called polystyrene. When polystyrene resin is in foam form, the cured foam of polystyrene resin is also called expanded polystyrene. Additives that can be added to polystyrene resin include foaming agents, curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, antistatic agents, foldability modifiers, impact resistance modifiers, and reaction diluents. Cured polystyrene resin products are used in automotive lamp lenses and covers, among other applications.

[0066] Silicone resins are highly condensed organic silicon compounds, possessing repeating structures of dimethylsiloxane and methylphenylsiloxane. Additives used in silicone resins include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant enhancers, antistatic agents, colorants, antistatic agents, foldability modifiers, impact resistance modifiers, and reaction diluents. Cured silicone resins are used in adhesives, coatings, and the like.

[0067] Polyvinyl chloride resin is a homopolymer of vinyl chloride or a copolymer of vinyl chloride and further vinyl monomers. Additives that can be added to polyvinyl chloride resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant enhancers, antistatic agents, colorants, antistatic agents, foldability modifiers, impact resistance modifiers, and reaction diluents. Cured polyvinyl chloride resin is used in building materials such as pipes and flooring.

[0068] Polycarbonate resin is a type of thermoplastic plastic. The bonding sites between monomer units are composed of carbonate groups (-O-(C=O)-O-). Additives used in polycarbonate resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant enhancers, antistatic agents, colorants, electrostatic imparters, foldability modifiers, impact resistance modifiers, and reaction diluents. Cured polycarbonate resins are widely used in components of automobiles and other vehicles, such as roofs and headlamp lenses.

[0069] Acrylonitrile-butadiene-styrene resin is an acrylonitrile-styrene copolymer in which polybutadiene, a rubbery polymer, is dispersed, and it is a copolymer of acrylonitrile and styrene, mainly consisting of three components: acrylonitrile, butadiene, and styrene. Additives that can be added to acrylonitrile-butadiene-styrene resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, antistatic agents, foldability modifiers, impact resistance modifiers, and reaction diluents. Cured products of acrylonitrile-butadiene-styrene resin are widely used in interior and exterior components of automobiles, etc., and are used in wheel caps, wheel covers, dashboards, etc.

[0070] In addition to the above, specific examples of uncured resin include inks such as oil-based markers or water-based markers, and writing instruments containing any of the above-mentioned resins.

[0071] <<Dust>> Dust is not particularly limited and can include solid matter floating in the air (for example, solid particles smaller than 5 mm).

[0072] <<Oily stains>> Oily contaminants include oil stains, flux stains, and uncured resin stains. Oily contaminants may also contain dust. The oil, flux, and uncured resin that serve as raw materials for oily contaminants are as described above. Depending on the polarity of the oil, oily contaminants can be categorized into non-polar oily contaminants, oily contaminants due to polar components, and oily contaminants due to multiple components with different polarities. Flux stains include rosin, inorganic salts of amine compounds, organic acids, and components that have been partially altered or carbonized by reflow soldering at high temperatures. Furthermore, solder paste stains include the flux components and metal powder. Resin stains can be categorized into non-polar resin stains, oily contaminants due to polar components, and oily contaminants due to multiple components with different polarities, depending on the polarity of the resin components and components used in combination.

[0073] <Cleaning method> A cleaning method using a cleaning solvent composition (i.e., a method of using a cleaning solvent composition) includes bringing the cleaning solvent composition into contact with an object to be cleaned. The object to be cleaned is a substrate on which oily dirt, oil, flux, uncured resin, and / or dust are attached. In the cleaning method, by bringing the cleaning solvent composition into contact with the object to be cleaned, the oily dirt, oil, flux, uncured resin, and / or dust attached to the substrate are removed from the substrate. If the oily dirt includes solid contaminants such as dust, these solid contaminants can be removed simultaneously with the removal of the oily dirt.

[0074] <Base material> The material of the base material is not particularly limited, but examples include metals, fibers, glass, ceramics, elastomers, and plastics. Examples of metals include silver, zinc, nickel, iron, aluminum, copper, manganese, magnesium, stainless steel, and aluminum alloys (alloys of aluminum with one or more metals consisting of copper, manganese, silicon, magnesium, zinc, and nickel). Examples of elastomers include rubbers such as 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 fluororubber, as well as thermoplastic elastomers (styrene-based, olefin-based, and vinyl chloride-based). Examples of plastics include polypropylene resin, polyethylene resin, PET resin (polyethylene terephthalate resin), epoxy resin, acrylic resin, polycarbonate resin, silicone resin, and ABS resin (acrylonitrile-butadiene-styrene resin). Furthermore, the substrate may be plastic, provided that the aforementioned oily stains, oil, flux, uncured resin, or dust are removed from the substrate.

[0075] Specific examples of the base material include apparatus and its components for obtaining cured resin products, metal processed products, electrical and electronic components, optical components, automobile parts, machine parts, semiconductor components, and display components.

[0076] Examples of electrical and electronic components include printed circuit boards and wiring boards such as ceramic substrates. Examples of optical components include optical lenses (e.g., camera lenses) and components for optical lenses (e.g., camera housings). Examples of automotive components include metal parts used in automobile shafts, frame components, exterior components, etc. Examples of mechanical components include bearings for vacuum pumps, semiconductor manufacturing equipment, cleaning equipment, motors, fans, etc., bearings for precision machinery such as watches, and components such as rollers for printing presses. Examples of semiconductor-related components include electronic components such as IC chips and resistors. Examples of display components include liquid crystal substrates, organic EL substrates, and inorganic EL substrates. The shapes of these components are not limited to plate-shaped members, but can also be pipe-shaped members with circular or rectangular cross-sections, long members, or members with other complex shapes. Because the cleaning solvent composition contains component (B), which has low surface tension, it has excellent penetration and is therefore particularly effective for cleaning objects with fine structures.

[0077] The items to be cleaned may be those used for routine maintenance, cleaned once or twice a day, or those used for overhaul, for example, cleaned once every six months to a year.

[0078] The cleaning solvent composition minimizes damage to the substrate (e.g., elastomers and resins). Therefore, the cleaning solvent composition may be a cleaning agent for cleaning a substrate containing one or more selected from the group consisting of elastomers and resins.

[0079] There are no particular limitations on the method for bringing the cleaning solvent composition into contact with the object to be cleaned. Examples include wiping (including manual wiping and mechanical wiping), immersion cleaning (liquid phase cleaning), spray cleaning (including spraying with a cleaning aerosol composition), shower cleaning, ultrasonic immersion cleaning, steam cleaning (gas phase cleaning), rinsing, and combinations thereof. The cleaning solvent composition is preferably a cleaning agent for wiping, a cleaning agent for brush cleaning, or a cleaning agent for rinsing. For cleaning aerosol compositions, refer to the description in Japanese Patent Application Publication No. 2018-105723. As an example of a cleaning method for an object to be cleaned by combining immersion cleaning and steam cleaning, an example is the cleaning method disclosed in Japanese Patent Application Publication No. 2015-217319, which uses a cleaning apparatus having a cleaning tank that houses a cleaning agent and into which the object to be cleaned is immersed, and a steam tank that generates steam of the cleaning agent.

[0080] A cleaning method by wiping involves cleaning the surface of the object to be cleaned by wiping it with a cleaning solvent composition. Because a physical force is applied by wiping, this cleaning method is more effective than immersion cleaning. Examples of wiping cleaning include manual wiping and mechanical wiping. Manual wiping is not particularly limited and may be performed by rubbing the area with oily stains and / or oil attached with paper, cotton, cloth, cotton swabs, etc., soaked in the cleaning solvent composition, while bringing them into contact with the area with oily stains and / or oil attached; or by rubbing the area with the area with oily stains and / or oil attached with paper, cotton, cloth, etc., soaked in the cleaning solvent composition, while bringing them into contact with the area with oily stains and / or oil attached with a board or stick. Alternatively, the cleaning solvent composition may be sprayed and then wiped with cotton, cloth, etc. Mechanical wiping is a cleaning method that mechanically performs the manual wiping described above. In wipe-cleaning, the number of times the object to be cleaned is wiped is not particularly limited, as long as it is sufficient to remove oily dirt, oil, flux, uncured resin, and / or dust adhering to the object, and may be one or two or more times.

[0081] Brush cleaning is a cleaning method in which the surface of the object to be cleaned is cleaned by scrubbing it with a brush using a cleaning solvent composition. Because brush cleaning involves the application of physical force by the brush, it is a cleaning method that is more effective than immersion cleaning. Brush cleaning can be done manually or mechanically. The brush material may be synthetic fiber, animal fiber, plant fiber, or metal wire. Synthetic fibers include nylon, polypropylene, polyethylene, polyester, polyvinyl chloride, acrylic, Teflon, polyphenylene sulfide, and fluororesin, and may contain abrasive particles, copper sulfide, elenon emulsion, etc. Animal fibers include horsehair, pig hair, sheep's wool, deer hair, and human hair. Plant fibers include tampico, palm, fern, fan palm, sisal, and palmyra. Metal wires include hardened steel wire, hardened wire, gold-plated wire, iron wire, stainless steel wire, brass wire, phosphor bronze, and beryllium copper. The surface may be cleaned by a brush immersed in a cleaning solvent composition, or by rinsing it first and then cleaning it with a brush.

[0082] A cleaning method using pouring involves applying a cleaning solvent composition to the surface of the object to be cleaned to achieve a cleaner. Because the physical force applied when the cleaning solvent composition is poured onto the surface of the object provides a more effective cleaning result compared to immersion cleaning. Methods for applying the cleaning solvent composition to the surface of the object include pouring the solvent composition from a bucket or tub, using a shower, spray, jet, or aerosol.

[0083] The cleaning time, which corresponds to the contact time between the cleaning solvent composition and the object to be cleaned, is not particularly limited as long as it is sufficient to remove oily dirt and / or oil from the substrate. For example, the cleaning time may be between 1 second and 2 hours. [Examples]

[0084] 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 refer to parts by weight.

[0085] (Products used) The components used in the examples are as follows. The compositions of the examples and comparative examples were prepared by using the following solvents either as they are or by mixing them, according to the composition (parts by weight) shown in the table.

[0086] 1. (A) Component a-1: Propylene glycol monomethyl ether (manufactured by Tokyo Chemical Industry Co., Ltd., 1-methoxy-2-propanol) a-2: 1-Propanol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) 2.(B) Component b-1: 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (manufactured by AGC Inc., Asahi Clean AE-3000) b-2: Methyl nonafluorobutyl ether (manufactured by Tokyo Chemical Industry Co., Ltd.) b-3: Methyl nonafluoroisobutyl ether b-4: Novec(trademark) 7100: A mixture of methyl nonafluoroisobutyl ether and methyl nonafluorobutyl ether (manufactured by 3M Japan Limited, 3M(trademark) Novec(trademark) 7100 high-performance liquid) 3.(C) Component c-1:1233Z; cis-1-chloro-3,3,3-trifluoropropene (HCFO-1233zd(Z), manufactured by Central Glass Co., Ltd.) c-2: AS-300; AMOLEA (registered trademark) AS-300 (manufactured by AGC Inc.) ((E)-1-chloro-2,3,3-trifluoropropene (HCFO-1233yd(E)), (Z)-1-chloro-2,3,3-trifluoropropene (HCFO-1233yd(Z)) and stabilizer mixture)

[0087] 4. Components other than (A), (B), and (C) a'-1: Propylene glycol (manufactured by Tokyo Chemical Industry Co., Ltd., 1,2-propanediol) a'-2: Dipropylene glycol monomethyl ether (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-3: Dipropylene glycol dimethyl ether (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-4: Diethylene glycol dimethyl ether (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-5: Diethylene glycol monomethyl ether (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-6:3-Methoxy-1-Butanol (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-7:3-Methoxy-3-methyl-1-butanol (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-8:3-Methoxy-3-methylbutylacetate (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-9: Diethylene glycol dibutyl ether (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-10: Diethylene glycol monobutyl ether (manufactured by Tokyo Chemical Industry Co., Ltd.) a'-11: Ethanol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) a'-12:2-propanol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) a'-13: Butyl lactate (manufactured by Fujifilm Wako Pure Chemical Corporation) a'-14: Ethylene glycol dimethyl ether (manufactured by Fujifilm Wako Pure Chemical Corporation) a'-15: Propylene glycol monobutyl ether (manufactured by Tokyo Chemical Industry Co., Ltd., 1-butoxy-2-propanol) b'-1: Novec® 7200; a mixture of ethyl nonafluorobutyl ether and ethyl nonafluoroisobutyl ether (manufactured by 3M Japan Ltd., 3M® Novec® 7200 high-performance liquid) b'-2: Opteon™ SF10 (Methoxyperfluoroheptene isomer mixture, over 99% by mass) (Manufactured by Mitsui Chemours Fluoroproducts Co., Ltd.) b'-3: Novec(trademark) 7300; 1,1,1,2,2,3,4,5,5,5-Decafluoro-3-methoxy-4-(trifluoromethyl)-pentane 99% to 100% by mass (manufactured by 3M Japan Limited, 3M(trademark) Novec(trademark) 7300 high-performance liquid)

[0088] 4.Oil etc. (1) Mineral oil: Daphne Marg Plus ST25 (manufactured by Idemitsu Kosan Co., Ltd.) (Hydrogenated low viscosity paraffin 90% to 100% by weight, sulfurized oils and fats 1% to less than 10% by weight, hydrogenated medium viscosity paraffin 1% to less than 10% by weight, 2,6-di-tert-butyl-4-cresol 0.1% to less than 1% by weight, solvent-dewaxed heavy paraffinic petroleum fraction 0.1% to less than 1% by weight, lubricating oil additive less than 2% by weight) (2) Vegetable oil: Edible olive oil (AJINOMOTO Extra Virgin Olive Oil, manufactured by J-Oil Mills Co., Ltd.) (3) Silicone oil: Dimethyl silicone oil 350CS (Shin-Etsu Chemical Co., Ltd., KF96-350CS-1, viscosity 350 cSt) (4) Macky pen: Oil-based marker Hi-Macky black (Zebra Corporation) (5) Uncured epoxy resin: A mixture of the main component and hardener of the high-performance epoxy adhesive Araldite® Standard (manufactured by Huntsman Japan Co., Ltd.) in a mass ratio of 1:1. (6) Uncured urethane resin: LOCTITE foamed urethane green foam (manufactured by Henkel Japan Ltd.) (7) Rosin-based flux: Flux BS-75B for printed circuit boards (manufactured by Taiyo Electric Industries Co., Ltd.) (27-29% rosin-based special synthetic resin, 2-3% activator, 68-70% alcohol-based solvent)

[0089] 5. Example Test The following Test Examples 1 to 9 were performed. Test Examples 1, 6, 7, and 9 are examples of cleanability tests; Test Example 2 is an example of safety tests; Test Example 3 is an example of drying properties; Test Examples 4 and 5 are examples of substrate damage tests; and Test Example 8 is an example of composition stability tests.

[0090] Test Example 1: Wipe Test (1) For the cleaning test, 0.1g of mineral oil, vegetable oil, silicone oil, or uncured resin was dropped onto the surface of a SUS304 plate (manufactured by Iwata Manufacturing Co., Ltd., 100mm x 100mm x 0.1mm) or a straight line was drawn on it with a permanent marker. In addition, a SUS304 plate left in a room for one month to allow dust to adhere was used as a cleaning test sample for dust. One set of two-ply tissue paper (manufactured by Oji Nepia Co., Ltd.) was folded into quarters to a size of 65 mm in length and 72 mm in width, and soaked with the cleaning composition of each example. It was then squeezed once between the thumb and index finger. The tissue paper soaked with each solvent composition was brought into contact with the surface of the SUS304 plate and wiped by rubbing with the hand. For subsequent wipes, a new tissue paper soaked with each solvent composition was used each time.

[0091] (Mineral oil, vegetable oil, silicone oil, or uncured resin) ◎+: Visually, two wipes are required to clean the surface of the SUS plate, but it was possible to clean it to a practically acceptable level with just one wipe. ◎: The surface of the SUS plate was visibly cleaned after wiping twice. ○: The surface of the SUS plate was visibly cleaned after wiping it three times. ●: The surface of the SUS plate was visibly cleaned after wiping four times. ×: Even after wiping it four times, there was still noticeable dirt.

[0092] (Mackie pen) ◎+: After wiping twice, no traces of the marker pen were visible to the naked eye, indicating that it was cleaned effectively. ◎: After wiping three times, no traces of the marker pen were visible to the naked eye, indicating that the area was cleaned effectively. ○: After wiping four times, no traces of the marker pen were visible to the naked eye, indicating that it was cleaned effectively. ●: After wiping four times, extremely fine traces of the Sharpie pen were observed, but it was generally clean and there were no practical problems. ×: Even after wiping it four times, clear marks from the permanent marker were still visible.

[0093] (dust) ◎: The surface of the SUS plate was visibly cleaned with a single wipe. ○: The surface of the SUS plate was visibly cleaned after wiping twice. ×: Even after wiping it twice, there was still noticeable dirt.

[0094] Test Example 2: Tag-type sealed flash point measurement Using a tag-type sealed flash point analyzer, the ATG-8L (Tanaka Scientific Instruments Co., Ltd.), flash point measurements were performed from -20°C down to the temperature at which the temperature stopped rising. ○: No flash point was detected. ×: Flash point was detected.

[0095] Test Example 3: Drying Test Approximately 20 mg of each solvent composition was weighed onto a SUS304 plate (manufactured by Iwata Manufacturing Co., Ltd., 100 mm x 100 mm x 0.1 mm), and the time it took for it to dry completely at room temperature (approximately 20°C) was measured. ◎+: Dry within 30 minutes. ◎: Dried in between 30 minutes and 1 hour. ○: Dried in between 1 hour and 1.5 hours. ●: Dry for more than 1.5 hours but within 2 hours. ×: Did not dry after 2 hours.

[0096] Test Example 4: Resin Damage Test Polycarbonate resin pieces (manufactured by Hikari Co., Ltd., 30mm x 10mm x 0.5mm) were immersed in 50mL of each composition in 50mL standard bottles at room temperature (approximately 20°C) for 3 hours. After wiping the surface with tissue paper, the damage to the polycarbonate resin pieces was evaluated as follows. ○: The resin retained its transparency, and there was no visible damage such as cracks. ×: The resin turned white, the resin disintegrated, or even though it was transparent during immersion, the resin turned white after wiping with tissue paper and drying.

[0097] Test Example 5: Elastomer Damage Test 20g of each composition was dropped onto a nitrile rubber O-ring (manufactured by Akitsu Industries Co., Ltd., 1AP-12, inner diameter 11.8mm) placed in the center of a glass petri dish. After 24 hours, the surface was wiped with tissue paper, and the damage to each test piece was evaluated as follows. ○: The weight change rate was 20% or less. ×: The weight change rate exceeded 20%, or alteration was observed on the surface.

[0098] Test Example 6: Wipe Test (2) A galvanized iron plate (equivalent to JIS G3302, 30 mm long, 20 mm wide, 0.3 mm thick) was coated with rosin-based flux, baked on a hot plate at approximately 180°C for 10 minutes, and then left at room temperature for 10 days to obtain a cleaning test sample. The degree of flux removal after wiping with a cotton swab soaked in each composition was evaluated as follows. For subsequent wipes, a new cotton swab soaked in a new composition was used. ◎: It was cleaned by wiping it three times. ○: It was cleaned by wiping it four times. ●: It was cleaned by wiping it 5 times. ×: Even after wiping it five times, flux residue was clearly still present.

[0099] Test Example 7: Mineral Oil Cleaning Test A SUS304 plate (manufactured by Iwata Manufacturing Co., Ltd., 35mm x 15mm x 0.1mm) with 0.05g of mineral oil dropped onto it was used as the cleaning test sample. An ultrasonic cleaner US-13KS (oscillation frequency: 38kHz, high-frequency output: 360W) manufactured by SND Corporation was filled with tap water and adjusted to a water temperature of approximately 40°C. 50mL of the cleaning composition was placed in a 100mL beaker, sealed with aluminum foil, and immersed in the ultrasonic cleaner to adjust the liquid temperature of the cleaning composition to approximately 39-40°C. Then, the cleaning test sample was immersed in the cleaning composition for 3 minutes under ultrasonic conditions. After that, as a rinse wash, the sample was placed in a 100mL beaker containing 50mL of the same composition at 20°C (room temperature). After 1 minute, the sample was removed from the liquid and air-dried. The condition of the SUS304 plate was observed, and the cleaning performance was evaluated as follows. ◎: The surface of the SUS plate was cleaned. ○: A very small amount of residual oil was observed on the surface of the SUS plate, but this does not pose a practical problem. ×: Clear traces of oil were observed on the surface of the SUS plate.

[0100] Test Example 8: Separation Confirmation Test under Low Temperatures [method] 20 ml of each composition from Examples 1-191 was placed in a standard bottle (manufactured by AS ONE Corporation, 24 mL capacity) and left in a refrigerator (approximately 5-10°C) for 1 hour. ○: The composition was not cloudy and remained a clear liquid. ×: Obvious turbidity was observed, or obvious separation was observed. [result] All compositions in Examples 1 to 191 were marked with a "○". On the other hand, when component (B) of each composition in Examples 1 to 52 was replaced with (b'-3)NOVEC(trademark) 7300, all results were "×".

[0101] Based on the results of Test Examples 1-8, the following judgments were made regarding the detergent. Overall Judgment ◎+: Particularly desirable as a cleaning agent (In Test Examples 1-8, there were 0 ×s, and both drying and cleaning properties were ◎+ ("Dust" in Test Example 1 was "◎")). ◎: Particularly desirable as a cleaning agent (In Test Examples 1-8, there are 0 ×s, and both drying and cleaning properties are ◎, or one is ◎ and the other is ◎+ (in Test Example 1, "dust" is "◎")) ○~◎: More desirable as a cleaning agent (In Test Examples 1~8, there were 0 ×s and the cleaning performance was ◎) ○: Desired as a cleaning agent (In Test Examples 1-8, there were 0 ×s and the cleaning performance was ○) ●: Preferred as a cleaning agent (In Test Examples 1-8, × is 0 and the cleaning performance is ●) ×: Undesirable as a cleaning agent (One or more × marks in Test Examples 1-8)

[0102] Test Example 9: Comparison Test of Washing Methods (Preparation of cleaning test samples) A SUS304 plate (manufactured by Iwata Manufacturing Co., Ltd., 35mm x 15mm x 0.1mm) with 0.05g of mineral oil dropped onto its surface was used as a cleaning test sample. (Cleaning method) Wipe-cleaning (1): One set of two-ply tissue paper (manufactured by Oji Nepia Co., Ltd.) was folded into quarters to a size of 65 mm in length and 72 mm in width, and soaked with the cleaning composition of each example. It was then squeezed once between the thumb and index finger. The tissue paper soaked with each solvent composition was brought into contact with the surface of the SUS304 plate and wiped by rubbing with the hand. Wipe-cleaning was performed three times. For the second and subsequent wipes, a new tissue paper soaked with each solvent composition was used each time. Wipe-cleaning (2): The cleaning procedure was the same as in wipe-cleaning (1), except that the wipe-cleaning was performed twice. Brush cleaning: A commercially available toothbrush with polypropylene bristles was immersed in each solvent composition, removed, and then used to clean the surface of the SUS304 plate for approximately 10 seconds. This cleaning process was repeated three times. Washing (1): 2 ml of each solvent composition was sprayed onto the surface of the SUS304 plate in one go using a Pasteur pipette. Spray washing (2): 300 ml of each solvent composition was placed in an aluminum refillable air spray can A1631D (capacity 650 ml, manufactured by FIRSTINFO TOOLS CO., LTD.), and then nitrogen gas was filled (0.6 MPa). The aerosol composition was sprayed for 10 seconds from a distance of 50 cm from the cleaning test sample. Immersion washing: 50 mL of a washing composition at approximately 20°C was placed in a 100 mL beaker, and the washing test sample was immersed in the washing composition for 1 minute. Then, for rinsing, the sample was placed in a 100 mL beaker containing 50 mL of the same composition at approximately 20°C, and removed from the liquid after 1 minute. During both washing and rinsing, the test sample was grasped with tweezers and swung from side to side every second. Ultrasonic Immersion Cleaning: An ultrasonic cleaner US-13KS manufactured by SND Corporation (oscillation frequency: 38kHz, high-frequency output: 360W) was filled with tap water. 50mL of a cleaning composition at approximately 20°C was placed in a 100mL beaker, and the cleaning test sample was immersed in the cleaning composition for 1 minute under ultrasonic conditions. Then, as a rinse wash, the sample was placed in a 100mL beaker containing 50mL of the same composition at approximately 20°C, and removed from the liquid after 1 minute. During the rinse wash, the test sample was grasped with tweezers and swung from side to side every second. (cleanability) ◎: The surface of the SUS plate was cleaned. ○: A very small amount of residual oil was observed on the surface of the SUS plate, but this does not pose a practical problem. ●: A small amount of residual oil was observed on the surface of the SUS plate, but this does not pose a practical problem. ×: Clear oil residue was observed on the surface of the SUS plate, which poses a practical problem.

[0103] The results are summarized in the table below.

[0104] [Table 1]

[0105] [Table 2]

[0106] Table 3

[0107] Table 4

[0108] Table 5

[0109] Table 6

[0110] Table 7

[0111] Table 8

[0112] Table 9

[0113] Table 10

[0114] Table 11

[0115] Table 12

[0116] Table 13

[0117] Table 14

[0118] Table 15

[0119] Table 16

[0120] Table 17

[0121] Table 18

[0122] Table 19

[0123] Table 20

[0124] Table 21

[0125] Table 22

[0126] Table 23

[0127] [Table 24]

[0128] [Table 25]

[0129] [Table 26]

[0130] [Table 27]

[0131] The first and second cleaning solvent compositions exhibited excellent drying properties, minimized damage to the substrate, and high cleaning performance and safety. Furthermore, the results were identical for the examples and comparative examples using (b-4) even when (b-4) was replaced with (b-2) or (b-4) was replaced with (b-3). Regarding Examples 1 to 8, the results of Test Examples 1, 6, and 7 showed that when the total of (A) and (B) was 100 parts by weight, if (A) was 30 parts by weight or more, the number of wiping cycles required to remove oily stains, oil, flux, uncured resin, or dust adhering to the object to be cleaned was reduced, resulting in superior cleaning performance. For Examples 1 to 8, based on the results of Test Example 3, when the total of (A) and (B) was 100 parts by weight, the drying properties were superior when (A) was 68 parts by weight or less. From Examples 9 to 31, when (B) is component (b-2) and / or component (b-3), the effects of the present invention were achieved when (A) was 92 parts by weight or less. Furthermore, from Examples 49 to 52, even when the content of (A) was 73 parts by weight or more and 92 parts by weight or less, the effects of the present invention were achieved because y1, which is the sum of the content of components (b-2) and (b-3), satisfies the relationship of formula (1): 100-x1≧y1≧(x1-73)×8÷19. Examples 32 to 52 demonstrate that the effects of the present invention were achieved even when multiple components (A) and (B) were used. Examples 53 to 191 relate to cleaning solvent compositions containing components (A) to (C). For example, as in Example 68, even when the content of (A) and (B) in the first cleaning solvent composition is outside the specified range, the effects of the present invention were achieved by using a second cleaning solvent composition that also incorporates component (C).

[0132] Comparative Example 1 consisted only of component (A), and therefore, based on the results of Test Example 2, its safety was inferior. Comparative Examples 2-17 consisted only of glycol-based solvents other than component (A), and therefore, particularly as shown in the results of Test Example 2, their safety was inferior. Furthermore, they were inferior in any of Test Examples 1-5, and while they had excellent drying properties, minimized damage to the substrate, and high cleaning properties, they were not solvent compositions. Comparative Example 18 consisted only of component (B), and therefore, based on the results of Test Example 1, its cleaning performance was inferior. Since Comparative Examples 19-20 consisted only of component (C), the damage to the substrate was not suppressed, particularly as shown in the results of Test Examples 4 and 5. Comparative Examples 21 and 22 were less safe than those of Test Example 2 because, when the total of (A) and (B) was 100 parts by weight, (A) was greater than 73 parts by weight, and (b-2) and (b-3) were not included, and the total content y1 of (b-2) and (b-3) did not satisfy the relationship in formula (1). Comparative Examples 23 and 24 had inferior cleaning performance because, when the total of (A) and (B) was 100 parts by weight, (A) was less than 15 parts by weight, as shown in the results of Test Example 1. Comparative Examples 25-26 were solvent compositions containing fluorine-based solvents other than component (B), and in particular, the results of Test Examples 4 and 5 showed that damage to the substrate was not suppressed. Comparative Examples 27-66 were solvent compositions containing glycol-based solvents other than component (A), and were inferior in any of Test Examples 1-5. They were not solvent compositions that exhibited excellent drying properties, minimized damage to the substrate, and high safety. Comparative Examples 67 to 76 were inferior in any of Test Examples 1 to 7 because either the amount of component (A) exceeded 92 parts by weight, the total content y1 of (b-2) and (b-3) did not satisfy the relationship in formula (1), or the amount of component (A) was less than 15 parts by weight. As a result, they were not solvent compositions that exhibited excellent drying properties, minimized damage to the substrate, and high safety. Comparative Examples 77-88 were solvent compositions containing fluorinated solvents other than component (B), and their safety was inferior according to the results of Test Example 2.

Claims

1. (a-1) One or more solvents (A) selected from the group consisting of propylene glycol monomethyl ether and (a-2) 1-propanol, A cleaning solvent composition comprising (b-1) one or more solvents (B) selected from the group consisting of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether, and (b-3) methyl nonafluoroisobutyl ether, When the sum of (A) and (B) is 100 parts by weight, A cleaning solvent composition in which the content of (A) is 15 parts by weight or more and 92 parts by weight or less, and where the content of (A) is 73 parts by weight or more and 92 parts by weight or less, if the content of (A) is 73 parts by weight or more and 92 parts by weight or less, then let the content of (A) be x1 and the total content of (b-2) and (b-3) be y1, such that 100 - x1 ≥ y1 ≥ (x1 - 73) × 8 ÷ 19 is satisfied.

2. The cleaning solvent composition according to claim 1, wherein (B) is (b-1) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, and when the total of (A) and (B) is 100 parts by weight, (A) is 15 parts by weight or more and 73 parts by weight or less.

3. The cleaning solvent composition according to claim 2, wherein when the total of (A) and (B) is 100 parts by weight, (A) is 30 parts by weight or more and 73 parts by weight or less.

4. The cleaning solvent composition according to claim 1, wherein (B) is one or more solvents selected from the group consisting of (b-2) methyl nonafluorobutyl ether and (b-3) methyl nonafluoroisobutyl ether, and when the total of (A) and (B) is 100 parts by weight, (A) is 15 parts by weight or more and 92 parts by weight or less.

5. The cleaning solvent composition according to claim 4, wherein when the total of (A) and (B) is 100 parts by weight, (A) is 30 parts by weight or more and 92 parts by weight or less.

6. The solvent composition according to any one of claims 1 to 5, wherein when the total amount of the cleaning solvent composition is 100 parts by weight, the sum of (A) and (B) is 55 parts by weight or more.

7. (a-1) One or more solvents (A) selected from the group consisting of propylene glycol monomethyl ether and (a-2) 1-propanol, (b-1) One or more solvents (B) selected from the group consisting of 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, (b-2) methyl nonafluorobutyl ether, and (b-3) methyl nonafluoroisobutyl ether, (c-1) One or more solvents (C) selected from the group consisting of hydrofluoroolefins and A cleaning solvent composition containing the following:

8. The cleaning solvent composition according to claim 7, wherein (C) is one or more solvents selected from the group consisting of cis-1-chloro-3,3,3-trifluoropropene, (E)-1-chloro-2,3,3-trifluoropropene, (Z)-1-chloro-2,3,3-trifluoropropene, 2-bromo-3,3,3-trifluoro-1-propene, 1,1-dichloro-3,3,3-trifluoropropene, 1,2-dichloro-3,3,3-trifluoropropene, and 1-chloro-1,3,3-trifluoropropene.

9. When the sum of (A), (B), and (C) is 100 parts by weight, The content of (C) is 45 parts by weight or less, The cleaning solvent composition according to claim 7 or 8, wherein the total content of (A) and (C) is 15 parts by weight or more and 92 parts by weight or less, and where the content of (A) is more than 73 parts by weight and less than 92 parts by weight, the total content of (A) is x2, and the total content of (b-2) and (b-3) is y2, and the following condition is satisfied: 100 - x2 > y2 > (x2 - 73) × 8 ÷ 19.

10. The solvent composition according to any one of claims 7 to 9, wherein when the total amount of the cleaning solvent composition is 100 parts by weight, the sum of (A), (B), and (C) is 60 parts by weight or more.

11. A cleaning solvent composition according to any one of claims 1 to 10, which is a cleaning agent for cleaning an object to be cleaned to which one or more substances selected from the group consisting of oily stains, oil, flux, uncured resin, and dust are attached.

12. A cleaning solvent composition according to any one of claims 1 to 11, comprising one or more selected from the group consisting of a wiping agent, a brush cleaning agent, a rinsing agent, and an ultrasonic immersion cleaning agent.

13. A cleaning method for cleaning the surface of an object to be cleaned by wiping, brushing, rinsing, or ultrasonic immersion cleaning using the cleaning solvent composition described in any one of claims 1 to 12.

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