Cleaning solvent composition and aerosol composition containing the same

Abstract

To provide a solvent composition reduced in coloration during use and / or storage.SOLUTION: The present invention relates to a solvent composition for cleaning and an aerosol composition for cleaning containing the same. The solvent composition for cleaning contains (A) 1-bromo-2-methylpropane and (B) epoxides and contains (C) nitroalkanes and / or (D) other components as optional components, the other components (D) being one or more selected from the group consisting of (d1) alcohols, (d2) perfume components, (d3) esters, (d4) hydrocarbons (excluding the perfume components (d2)), (d5) glycol ethers, and (d6) cyclic ethers (excluding the epoxides (B)).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cleaning solvent composition and an aerosol composition containing the same. [Background technology]

[0002] 1-Bromo-2-methylpropane (isobutyl bromide) has excellent degreasing properties and is expected to be a major component of bromine-based cleaning agents. Example No. 2 of Patent Document 1 shows a solvent composition consisting only of isobutyl bromide and nitromethane. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-150196 Summary of the Invention [Problem to be solved by the invention]

[0004] However, brominated solvents are known to change color from yellow to brown over time during storage in a container or during use at low or high temperatures. This phenomenon can occur even when the solvent is stored in a non-metallic container or when boiled alone, but it is more pronounced when the solvent is stored in a metal container (stainless steel, aluminum, copper, iron, etc.) or when substrates containing such metals are cleaned at high temperatures. Furthermore, according to the inventors' findings, the solvent composition consisting of only isobutyl bromide and nitromethane, as disclosed in Example No. 2 of Patent Document 1, was found to significantly yellow when cleaning metals and to cause a corrosive reaction with some metals. Therefore, when a solution that significantly yellows is used as a cleaning agent, depending on the cleaning conditions, the object to be cleaned may also become yellow, or the quality of the cleaning agent may be reduced, resulting in some cleaning defects.

[0005] An object of the present invention is to provide a cleaning solvent composition that is reduced in coloration during use and / or storage.

[0006] The present invention has the following configuration. [1] A cleaning solvent composition comprising (A) 1-bromo-2-methylpropane and (B) an epoxide. [2] The cleaning solvent composition according to [1], further comprising (c) a nitroalkane. [3] The cleaning solvent composition of [1] or [2], further comprising one or more (D) other components selected from the group consisting of (d1) alcohols (excluding (d2) fragrance components and (d5) glycol ethers), (d2) fragrance components, (d3) esters, (d4) hydrocarbons (excluding (d2) fragrance components), (d5) glycol ethers, and (d6) cyclic ethers (excluding (B) epoxides). [4] The cleaning solvent composition according to any one of [1] to [3], which is a cleaning agent for cleaning an object to be cleaned having one or more substances selected from the group consisting of oily stains, oil, flux, and resin attached thereto. [5] The cleaning solvent composition according to any one of [1] to [4], which is a cleaning agent for use as a hand wipe cleaner. [6] A cleaning aerosol composition comprising the cleaning solvent composition according to any one of [1] to [5] and a propellant gas. [7] The cleaning solvent composition of any one of [1] to [4], which is a cleaning agent for use in a method for cleaning an object to be cleaned, comprising: step (1A): immersing an object to be cleaned in the cleaning solvent composition of any one of [1] to [4]; and step (1B): generating steam containing component (A) from the cleaning solvent composition of any one of [1] to [4], and contacting the object to be cleaned with the generated steam containing component (A). [Effects of the Invention]

[0007] The present invention provides a cleaning solvent composition that exhibits reduced coloration during use and / or storage. DETAILED DESCRIPTION OF THE INVENTION

[0008] (Definition of terms) "(A) 1-bromo-2-methylpropane" may be referred to as "(A)" or "(A) component." The same applies to other components such as "(B) epoxides." Regarding numerical ranges, "to" means that both ends of the range are included. For example, "0.1 to 10 parts by weight" means "0.1 part by weight or more and 10 parts by weight or less." Furthermore, "or less" means "the same as or less than," and "or more" means "the same as or greater than."

[0009] [Cleaning solvent composition] The cleaning solvent composition (hereinafter also simply referred to as "solvent composition") contains (A) 1-bromo-2-methylpropane and (B) an epoxide.

[0010] A solvent composition containing components (A) and (B) can prevent component (A) from turning yellow to brown even when stored in a container made of metal (stainless steel, iron, etc.) or when used to clean a substrate containing the metal. Furthermore, a solvent composition containing components (A) and (B) can prevent component (A) from turning yellow to brown even when stored in a container made of a resin other than a metal or when used to clean a substrate containing a resin other than a metal.

[0011] <(A) 1-Bromo-2-methylpropane> Component (A) is the main component of the solvent composition. Component (A) is sometimes called isobutyl bromide. 1-Bromo-2-methylpropane may be a commercially available product or may be synthesized.

[0012] <(B) Epoxides> Component (B) is the main component of the solvent composition. Component (B) is not particularly limited as long as it has one or more epoxy groups in its molecule. Examples of component (B) include aliphatic epoxides (excluding alicyclic epoxides), alicyclic epoxides, and aromatic epoxides, and these may be commercially available products or may be synthesized.

[0013] Aliphatic epoxides (excluding alicyclic epoxides) include alkylene oxides such as 1,2-butylene oxide (1,2-epoxybutane), 2,3-butylene oxide, propylene oxide, pentene oxide, normal hexene oxide, heptene oxide, octene oxide, glycidol, and isobutylene oxide; epoxides containing halogen atoms such as epichlorohydrin and epibromohydrin; butyl glycidyl ether, 2-ethylhexyl glycidyl ether, and ethylene glycol. Examples of the alkyl glycidyl ether include diglycidyl ether, glycidyl ether of dodecyl alcohol, glycidyl ether of tridecyl alcohol, methyl glycidyl ether, ethyl glycidyl ether, normal propyl glycidyl ether, isopropyl glycidyl ether, and higher alcohol glycidyl ethers; and alkyl glycidyl esters such as glycidyl acetate, glycidyl propionate, glycidyl butyrate, glycidyl methacrylate, glycidyl benzoate, and epoxidized decyl oleate.

[0014] Examples of the alicyclic epoxide include cyclopentene oxide (1,2-epoxycyclopentane) and cyclohexene oxide.

[0015] Examples of aromatic epoxides include styrene oxide and cresyl glycidyl ether.

[0016] Component (B) preferably has one or two epoxy groups in the molecule, and preferably does not contain chlorine atoms, and particularly preferably does not contain halogen atoms.

[0017] Component (B) may be one type or a combination of two or more types. Component (B) is preferably 1,2-butylene oxide, methyl glycidyl ether, or cyclopentene oxide, from the viewpoint that it exhibits excellent effects even when added in small amounts.

[0018] <Additional Ingredients> The solvent composition may contain components other than the components (A) and (B) as long as the effects of the present invention are not impaired. Such components include (C) nitroalkanes and (D) other components.

[0019] <(C) Nitroalkanes> The (C) nitroalkane is not particularly limited as long as it has one or more nitro groups in the molecule. Examples of the (C) component include nitromethane, nitroethane, 1-nitropropane, and 2-nitropropane. The (b1) component is preferably nitromethane or nitroethane. The component (C) may be one type or a combination of two or more types.

[0020] (D) Other ingredients (D) Other components include (d1) alcohols (excluding (d2) fragrance components and (d5) glycol ethers), (d2) fragrance components, (d3) esters, (d4) hydrocarbons (excluding (d2) fragrance components), (d5) glycol ethers, (d6) cyclic ethers, and (d7) components other than (d1) to (d6).

[0021] <<<(d1) Alcohols (excluding (d2) fragrance ingredients and (d5) glycol ethers)>>> (d1) Alcohols (excluding (d2) fragrance components and (d5) glycol ethers) include monoalcohol solvents, such as ethanol, methanol, 1-propanol, isopropyl alcohol, 1-butanol, isobutyl alcohol, tertiary butanol, secondary butyl alcohol, phenoxyethanol, benzyl alcohol, diacetone alcohol, 2-propyn-1-ol, 2-ethylhexanol, etc. (d1) Alcohols are preferably ethanol, 1-propanol, or isopropyl alcohol.

[0022] <<<(d2) Fragrance ingredients>>> Preferred fragrance components (d2) include limonene, pinene, myrcene, linalool, terpineol, alloocimene, terpinene, terpineol, etc. When the solvent composition contains component (d2), it is possible to reduce the odor caused by component (A) and at the same time impart a desired fragrance to the solvent composition.

[0023] <<<(d3) Esters>>> Examples of (d3) esters include monoester solvents, ester solvents having two carbonyl groups, carbonate ester solvents, and cyclic ester solvents. Specific examples of (d3) component include methyl acetate, ethyl acetate, normal 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 acetoacetate, γ-butyrolactone, dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, ethylene carbonate, propylene carbonate, butylene carbonate, dimethyl oxalate, and diethyl oxalate. Dimethyl carbonate and γ-butyrolactone are preferred for (b3).

[0024] <<<(d4) Hydrocarbons (excluding (d2) fragrance ingredients)>>> (d4) Hydrocarbons (excluding (d2) fragrance components) consist solely of carbon and hydrogen and may be linear or branched, cyclic or acyclic, and may contain carbon-carbon double bonds. Examples of (d4) components include hexane, isohexane, cyclohexane, normal heptane, isoheptane, cycloheptane, normal octane, isooctane, nonane, isononane, decane, methylcyclohexane, ethylcyclohexane, 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, and aromatic hydrocarbons. Hydrocarbon solvents may also be synthetic.

[0025] <<<(d5) Glycol ethers>>> (d5) Glycol ethers are compounds in which one or both hydroxy groups of ethylene glycol or propylene glycol are substituted with alkyl, alkenyl, alkynyl, or aryl.Examples of component (d5) include methyl cellosolve, ethyl cellosolve, isopropyl cellosolve, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, diethylene glycol monoethyl ether, triethylene glycol monoethyl ether, ethylene glycol monopropyl ether, diethylene glycol monopropyl ether, triethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monoethyl ether, tripropylene glycol monoethyl ether, propylene glycol monopropyl ether, dipropylene glycol monopropyl ether, tripropylene glycol monopropyl ether, propylene glycol monobutyl ether, and dipropylene glycol monobutyl ether. Examples of suitable ethylene glycol monoesters include propylene glycol monobutyl ether, tripropylene glycol monobutyl ether, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, tripropylene glycol, diethylene glycol monobutyl ether, ethylene glycol dimethyl ether (monoglyme), diethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol diethyl ether, triethylene glycol dimethyl ether, diethylene glycol dibutyl ether, dimethoxytetraethylene glycol, dipropylene glycol dimethyl ether, propylene 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. Component (d5) is preferably propylene glycol monomethyl ether.

[0026] <<<(d6) Cyclic ethers (excluding (B) epoxides)>>> (d6) Examples of cyclic ethers include 1,3-dioxolane, 1,4-dioxane, tetrahydrofuran, methyltetrahydrofuran, and 4-methyltetrahydropyran.

[0027] <<<(d7) Components other than (d1) to (d6)>>> (d7) Examples of components other than (d1) to (d6) include acyclic ethers (excluding (b5) glycol ethers), chloroolefins (excluding those having fluorine atoms), water, ultraviolet absorbers, antioxidants, polymerization inhibitors, rust inhibitors, antifoaming agents, surfactants, and chelating agents.

[0028] Examples of the acyclic ethers (excluding (b5) glycol ethers) include dipropyl ether, diisopropyl ether, diethyl ether, diisobutyl ether, dibutyl ether, and methyl tertiary butyl ether.

[0029] Chloroolefins (excluding those containing fluorine atoms) are olefin compounds containing carbon and chlorine atoms and may also contain hydrogen atoms. Examples include hydrochloroolefins, perchloroolefins, and chlorofluoroolefins. Examples of hydrochloroolefins include trans-1,2-dichloroethylene and trichloroethylene. Examples of perchloroolefins include tetrachloroethylene (perchloroethylene).

[0030] The ultraviolet absorber and antioxidant are components that improve the stability of the solvent 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.

[0031] The phenolic antioxidants are 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-(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-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, 4-methoxyphenol, 2-methoxyphenol, etc. Methylhydroquinone (2,5-dihydroxytoluene) and 4-methoxyphenol can also be used as polymerization inhibitors.

[0032] Examples of the amine 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-dipropionate, 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.

[0033] The chelating agent may be an aminocarboxylic acid-based chelating agent, and preferred are hydroxyethylaminoacetic acid, hydroxyethyliminodiacetic acid, ethylenediaminetetraacetic acid, and salts thereof.

[0034] 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 examples include 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.

[0035] The component (d7) other than the above-mentioned components is not particularly limited as long as it is a component commonly used in the field of bromine-based cleaning solvent compositions, and can be used as appropriate. The component (D) may be one type or a combination of two or more types.

[0036] The additional components may each be a combination of one or more types, for example, a combination of one or more types of component (C) and one or more types of component (D).

[0037] <Preferred embodiment> The solvent composition preferably further contains (C) a nitroalkane. When the solvent composition further contains component (C), damage to metals (particularly aluminum, aluminum die-cast, and copper) is reduced.

[0038] The solvent composition preferably further comprises one or more (D) other components selected from the group consisting of (d1) alcohols (excluding (d2) fragrance components and (d5) glycol ethers), (d2) fragrance components, (d3) esters, (d4) hydrocarbons (excluding (d2) fragrance components), (d5) glycol ethers, and (d6) cyclic ethers (excluding (B) epoxides). When the solvent composition further comprises the (D) component, a solvent composition exhibiting the effects of the present invention may be produced efficiently (at low cost). Furthermore, from the viewpoint of cleaning properties for epoxy resins or urethane resins, the (D) component is preferably one or more selected from the group consisting of the (d1), (d2), (d3), (d5), and (d6) components.

[0039] <Composition of Solvent Composition> In the solvent composition, the content of each component per 100 parts by weight of component (A) is as follows: The content of component (B) is preferably more than 0 parts by weight and not more than 20 parts by weight, more preferably from 0.05 to 10 parts by weight, and particularly preferably from 0.1 to 5 parts by weight. The content of the (C) nitroalkanes is preferably 0 parts by weight or more and 400 parts by weight or less. The content of the (C) component may be 0.1 parts by weight or more, 0.3 parts by weight or more, or 0.85 parts by weight or more. The content of the (C) component may be 200 parts by weight or less, 100 parts by weight or less, 20 parts by weight or less, 10 parts by weight or less, or 5 parts by weight or less. From the viewpoint of cleaning ability against epoxy resins or urethane resins, the content of the (C) component is preferably 20 parts by weight or more and 200 parts by weight or less. From the viewpoint of solubility in oil, the content of the (C) component is preferably 100 parts by weight or less. Furthermore, from the viewpoint of further reducing damage to aluminum and aluminum alloys (excluding aluminum die-castings), the content of the (C) component is preferably 0.3 parts by weight or more. From the viewpoint of further reducing damage to aluminum die-castings, the content of the (C) component is preferably 0.9 parts by weight or more. The total content of the (D) other components may be 0 to 400 parts by weight, 5 to 300 parts by weight, or 10 to 100 parts by weight. From the viewpoint of oil solubility or flux cleanability, the content of the (d1) component is preferably 100 parts by weight or less. From the viewpoint of oil solubility or flux cleanability, the content of the (d3) component is preferably 300 parts by weight or less, and particularly preferably 200 parts by weight or less. From the viewpoint of flux cleanability, the content of the (d4) component is preferably 200 parts by weight or less. From the viewpoint of oil solubility or flux cleanability, the content of the (d5) component is preferably 200 parts by weight or less, and particularly preferably 100 parts by weight or less.

[0040] In addition to the above, when the total amount of the solvent composition is 100 parts by weight, the content of component (A) is preferably 20 parts by weight or more but less than 100 parts by weight, preferably 25 parts by weight or more but less than 99 parts by weight, and particularly preferably 45 parts by weight or more but less than 95 parts by weight. Furthermore, when the total amount of the solvent composition is 100 parts by weight, from the viewpoint of improving odor caused by component (A), the content of component (d2) is preferably 0.01 parts by weight or more but less than 10 parts by weight, and particularly preferably 0.1 parts by weight or more but less than 5 parts by weight.

[0041] Furthermore, when the total amount of the solvent composition is 100 parts by weight, the total content of components (A) to (D) is preferably 70 to 100 parts by weight, more preferably 80 to 99 parts by weight, and particularly preferably 90 to 98 parts by weight, with the remainder being impurities of components (A) to (D).

[0042] When the component (B) is limited to a specific component (e.g., component (b1)), the solvent composition may or may not contain a component (B) other than the specific component (e.g., components (b2) to (b7)). For example, when the specific component is component (b1) and the other component (B) is one or more selected from the group consisting of components (b2) to (b7), the total content of components (A), (b1), (C), and (D) may be 70 to 100 parts by weight, and the remainder, including one or more selected from the group consisting of components (b2) to (b7), may be 0 to 30 parts by weight, relative to 100 parts by weight of the total amount of the solvent composition. The same applies when the components (C) and (D) are limited to specific components.

[0043] When the solvent composition contains water, the water content is preferably 0.1 parts by weight or less, more preferably more than 0 parts by weight but less than 0.1 parts by weight, based on 100 parts by weight of the total amount of the solvent composition, and particularly preferably does not contain water. Furthermore, for cleaning solvent compositions with a low water content, the pH cannot usually be measured, but the pH is preferably 5 or more and less than 8. The solvent composition may or may not contain a pH adjuster, but preferably does not contain a pH adjuster. Examples of such pH adjusters include caustic alkali, ammonia alkali, quaternary amine hydroxide, an aqueous solution of any of the above three components, and alkaline electrolyzed water, and specific examples are as described in JP 2013-221080 A. The solvent composition may or may not contain a fluorine-based solvent, but preferably does not contain one. Examples of fluorine-based solvents include components having one or more fluorine atoms in the molecule.

[0044] [Method of producing cleaning solvent composition] The cleaning solvent composition can be produced by any method, including stirring, mixing, dissolving, dispersing, etc., of the raw material components contained in the cleaning solvent composition by a known method.

[0045] (Method for storing cleaning solvent composition) The method for storing the cleaning solvent composition is not particularly limited as long as it is a method commonly used for storing bromine-based cleaning solvent compositions. Specific examples of the method for storing the cleaning solvent composition include a method in which the solvent composition is stored in a container. Examples of the material for the container, including preferred embodiments, include the materials described below for the substrate of the object to be cleaned.

[0046] [Uses of cleaning solvent composition] The cleaning solvent composition has excellent solubility in oil, flux, and / or resin, and can therefore be used as a cleaning agent for cleaning objects to which one or more selected from the group consisting of oily stains, oil, flux, and resin are attached.

[0047] <Oil> Examples of oils include mineral oil, vegetable oil, animal oil, heavy oil, wax, silicone oil, fluorinated oil, etc. These oils may be used, for example, as cutting oil, press oil, drawing oil, heat treatment oil, rust preventative oil, lubricating oil, metal processing oil, grease, asphalt, and water-soluble oil.

[0048] There are no particular limitations on the mineral oil, and a commercially available product such as Pulley SF Oil (manufactured by Ozawa Kogyo Co., Ltd.) is an example. Examples of vegetable oils include olive oil, linseed oil, tung oil, sesame oil, safflower oil, soybean oil, castor oil, cottonseed oil, palm oil, corn oil, and dehydrated castor oil. Fatty acids constituting vegetable oils are saturated or unsaturated C12-C18 fatty acids, specifically 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 vegetable, animal, petroleum, and synthetic hydrocarbons.

[0049] Silicone oil is a linear polymer silicone oil that consists of siloxane bond, and can be mainly dimethylsilicone oil or methylphenylsilicone oil, with other organic groups such as carboxyl group, amino group, polyether group or epoxy group introduced into the side chain or end of dimethylsilicone oil or methylphenylsilicone oil.Specific examples of such silicone oil include dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, polyoxyethylene-methylpolysiloxane, etc.As commercially available products of such silicone oil, include KF-96L-2CS, KF-6012, etc. manufactured by Shin-Etsu Chemical Co., Ltd.

[0050] Fluorine oils are substances in which some or all of the hydrogen atoms in a polyalkyl ether compound have been substituted with fluorine, and may contain additional atoms such as halogens such as chlorine and bromine, phosphorus, sulfur, and nitrogen. Commercially available fluorine oils include Fomblin Y-LVAC, Y-HVAC, Y04, and YR manufactured by Solvay Solexis K.K.; BARRIERTA J100 fluid, BARRIERTA J25 fluid, BARRIERTA J400 fluid, BARRIERTA J25V, BARRIERTA SJ07, BARRIERTA SJ15, and BARRIERTA SJ30 manufactured by NOK Kluber K.K.; Krytox 1506, Krytox 1514, and Krytox 1525 manufactured by DuPont; and Demnum S-20 manufactured by Daikin Industries, Ltd.

[0051] Water-soluble oils are broadly classified into emulsion, soluble, and solution types. Emulsion types are primarily composed of water-insoluble oils such as mineral oil or fatty oil, and surfactants, and form a milky emulsion when diluted with water. Soluble types also contain water-insoluble oils and surfactants, but become transparent to translucent when diluted with water. Solution types are primarily 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, surfactants, and water.

[0052] <Flux> Examples of the flux include rosin-based fluxes. Rosin-based fluxes include non-activated rosin fluxes whose main components are rosins such as rosin (a resin acid mainly composed of abietic acid) and modified rosins; and activated rosin fluxes whose main components are the rosins and one or more activators selected from the group consisting of inorganic acid salts of amine compounds (e.g., hydrochlorides and sulfates) and organic acids. Examples of inorganic acid 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 oxyacids (hydroxycarboxylic acids).

[0053] Flux may also be provided in the form of cream solder, which is a combination of soldering metal and rosin flux. Cream solder is a composition containing solder alloy powder, resin, activator, antioxidant, thixotropic agent, and solvent, and is composed of so-called metal powder and flux components.

[0054] <Resin> Examples of resins include urethane resin, epoxy resin, acrylic resin, styrene resin, silicone resin, polycarbonate resin, acrylonitrile-butadiene-styrene resin, polyamide resin, polyacetal resin, polyvinyl chloride resin, and polyurea resin, with urethane resin and epoxy resin being preferred. It is also preferred that the resin is not PET resin. It is also preferred that the resin is semi-cured or uncured.

[0055] 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 a foam form, it may be any of flexible, semi-rigid, and rigid foams. Additives that may be blended into the urethane resin include curing agents, curing accelerators, emulsifiers, blowing agents, stabilizers, plasticizers, flame retardants, antistatic agents, colorants, sliding modifiers, and impact modifiers.

[0056] Epoxy resins include bisphenol A epoxy resins, bisphenol F epoxy resins, bisphenol AD ​​epoxy resins, polyglycidyl ethers of polyhydric alcohols, polyglycidyl esters of polybasic acids, 3,4-epoxycyclohexyl-3',4'-epoxycyclohexanecarboxylate, vinylcyclohexene diepoxide, cresol novolac epoxy resins, and epoxy resins containing hydantoin rings. Additives that can be incorporated into epoxy resins include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, charge-imparting agents, sliding modifiers, impact modifiers, and reactive diluents.

[0057] The epoxy resin curing agent may be any one that is commonly used as an epoxy resin curing agent, such as novolaks such as phenol novolak, biphenol novolak, and bisphenol A novolak, acid anhydrides such as phthalic anhydride, pyromellitic anhydride, and benzophenone tetracarboxylic anhydride, amines such as diaminodiphenylmethane, diaminodiphenyl sulfone, metaphenylenediamine, and hexamethylenetetramine, and amide resins such as polyamidoamine, etc. The curing accelerator may be, for example, a tertiary amine or an organic phosphorus compound.

[0058] Examples of acrylic resins include compounds having an acryloyl group and / or a methacryloyl group, such as methyl (meth)acrylate and 2-hydroxyethyl (meth)acrylate. Here, (meth)acrylate refers to at least one of acrylate and methacrylate. Examples of additives that can be incorporated into acrylic resins 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.

[0059] Styrene resin is a polymer containing 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 polystyrene. Additives that can be blended into 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 property improvers, impact resistance improvers, and reactive diluents.

[0060] Silicone resins are highly condensed organosilicon compounds and have a repeating structure of dimethylsiloxane or methylphenylsiloxane. Additives that can be incorporated into silicone resins include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge imparting agents, sliding modifiers, impact modifiers, and reactive diluents. Cured silicone resins are used in adhesives, coatings, and the like.

[0061] Polycarbonate resin is a type of thermoplastic plastic. The bond between monomer units is composed of a carbonate group (-O-(C=O)-O-). Additives that are blended 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 modifiers, impact modifiers, and reactive diluents. Cured polycarbonate resins are widely used in automotive components, including roofs and headlamp lenses.

[0062] Acrylonitrile-butadiene-styrene resin is a copolymer of acrylonitrile and styrene with dispersed polybutadiene, a rubbery polymer. Its main components are acrylonitrile, butadiene, and styrene. Additives used in acrylonitrile-butadiene-styrene resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant aids, antistatic agents, colorants, electrostatic charge imparting agents, sliding modifiers, impact modifiers, and reactive diluents. Cured acrylonitrile-butadiene-styrene resin is widely used in interior and exterior components of automobiles, including wheel caps, wheel covers, and dashboards.

[0063] Polyamide resins are copolymers containing amide bonds and may be synthesized by polycondensation of ω-amino acids or by co-condensation of diamines and dicarboxylic acids. Polyamide resins may be aliphatic or aromatic. Additives that may be incorporated into polyamide resins include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge-imparting agents, sliding modifiers, impact modifiers, and reactive diluents. Cured polyamide resins are used in automotive parts such as engine covers, industrial valves, filaments, and other applications.

[0064] Polyacetal resin is a copolymer having an oxymethylene (-CHO-) unit structure and may contain an oxyethylene unit (-CHCHO-). Additives that can be blended into polyacetal resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge imparting agents, sliding modifiers, impact modifiers, and reactive diluents. Cured polyacetal resins are used in gears, bearings, pump parts, and the like.

[0065] Polyvinyl chloride resin is a homopolymer of vinyl chloride or a copolymer of vinyl chloride and another vinyl monomer. Additives that can be blended into polyvinyl chloride resin include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge imparting agents, sliding modifiers, impact modifiers, and reactive diluents. Cured polyvinyl chloride resins are used in building materials such as pipes and flooring.

[0066] Polyurea resins contain urea bonds obtained by the reaction of isocyanate and polyamine. Additives that can be incorporated into polyurea resins include curing agents, curing accelerators, fillers, stabilizers, plasticizers, lubricants, flame retardants, flame retardant assistants, antistatic agents, colorants, charge imparting agents, sliding modifiers, impact modifiers, and reactive diluents. Cured polyurea resins are used in waterproof linings and paints.

[0067] <Oily stains> Oily stains include oil stains, flux stains, and resin stains. The raw materials for oily stains, oil, flux, and resin, are as described above. Depending on the polarity of the oil, oily stains include nonpolar oily stains, oily stains caused by polar components, and oily stains caused by multiple components with different polarities. Flux stains include flux components such as rosin, inorganic acid salts of amine compounds, and organic acids, as well as components that are partially altered or carbonized by high-temperature reflow. Cream solder stains include flux component stains and metal powder. Depending on the polarity of the resin component and the components used in combination, resin stains include nonpolar resin stains, oily stains caused by polar components, and oily stains caused by multiple components with different polarities.

[0068] (Cleaning aerosol composition) The cleaning aerosol composition contains a solvent composition and a propellant gas. The aerosol composition maintains its solution state without volatilizing the solvent composition immediately after spraying. After spraying, the aerosol composition can deliver a mist of the solvent composition in a concentrated manner over a narrow area, rather than dispersing into fine droplets over a wide area. In other words, the solvent composition can be applied from a long distance, targeting the area to be cleaned. Furthermore, the solvent composition can be prevented from coming into contact with the substrate of the object to be cleaned, allowing the metal parts of the object to be cleaned to be cleaned efficiently.

[0069] The propellant gas may be one or more selected from the group consisting of compressed air, N2, argon, CO2, and LPG. The form of the propellant gas is not particularly limited, and may be in the form of a liquefied gas or a compressed gas. From the viewpoint of preventing the solvent composition from rapidly volatilizing, the propellant gas is preferably one or more selected from the group consisting of compressed air, N2, argon, and CO2.

[0070] The method for producing a cleaning aerosol composition is not particularly limited, and examples thereof include a method in which an aerosol composition obtained by mixing a solvent composition and a liquid propellant gas is filled into a pressure can to form an aerosol, or a method in which the solvent composition is added to a container (e.g., a pail can) and then compressed air is filled into the container using an air compressor or the like to form an aerosol. For other cleaning aerosol compositions, reference can be made to the description in JP 2018-105723 A.

[0071] (Cleaning method) The method for using the solvent composition is a method for cleaning an object to be cleaned using the solvent composition, and includes contacting the solvent composition with the object to be cleaned. In the cleaning method, oily stains, oil, flux, and / or resin adhered to the substrate are removed from the substrate by contacting the solvent composition with the object to be cleaned. In addition, when the oily stains include solid stains such as dust and dirt, the solid stains can be removed simultaneously with the removal of the oily stains.

[0072] The substrate is not particularly limited, but examples thereof include metal, fiber, glass, ceramic, plastic, etc., and preferably contains metal. Substrates containing metal include substrates combining metal with one or more materials selected from the group consisting of fiber, glass, ceramic, and plastic. Examples of metals include silver, zinc, nickel, iron, tin, galvanized iron, tinplate, aluminum, copper, manganese, magnesium, stainless steel, titanium, aluminum alloys (alloys of aluminum and one or more metals selected from copper, manganese, silicon, magnesium, zinc, and nickel, excluding aluminum die-casting), aluminum die-casting, etc. Examples of ceramics include alumina, zirconia, barium titanate, hydroxyapatite, silicon carbide, silicon nitride, steatite, forsterite, cordierite, etc. Examples of plastics include PET resin (polyethylene terephthalate resin), epoxy resin, polyethylene resin, polypropylene resin, fluororesin, etc. The substrate may be plastic as long as the aforementioned oily stains, oil, flux, or resin can be removed from the substrate.

[0073] The method for contacting the object to be cleaned with the solvent composition is not particularly limited, and examples thereof include hand wiping, immersion cleaning (liquid-phase cleaning), spray cleaning (including spraying with a cleaning aerosol composition), shower cleaning, ultrasonic cleaning, steam cleaning (gas-phase cleaning), water-flow cleaning, and combinations thereof. Hand wiping, immersion cleaning, steam cleaning, spray cleaning (including spray cleaning using a cleaning aerosol composition), a combination of immersion cleaning and ultrasonic cleaning, and a combination of immersion cleaning and steam cleaning are preferred. Hand wiping is typically performed by bringing paper, cloth, etc. impregnated with the composition into contact with the area with oily soiling and / or oil and rubbing the area with hands, or by bringing paper, cloth, etc. impregnated with the composition into contact with the area with oily soiling and / or oil and rubbing the area with hands using a plate or rod. Spray cleaning using a cleaning aerosol composition is performed by spraying the cleaning aerosol composition as an aerosol onto the area with oily soiling and / or oil.

[0074] When the method for cleaning an object to be cleaned using a solvent composition is a combination of immersion cleaning and steam cleaning, specific examples of the cleaning method include the following steps: Step (1A): immersing the object to be cleaned in the solvent composition; and Step (1B): generating steam containing component (A) from the solvent composition and bringing the object to be cleaned into contact with the generated steam containing component (A).

[0075] Step (1A) is a step of immersing the object to be cleaned in the solvent composition. In step (1A), the object to be cleaned comes into contact with the solvent composition. To enhance the cleaning effect, it is preferable to combine means such as heating, stirring, shaking, ultrasonic vibration, or air bubbling with the immersion. The immersion cleaning time is not particularly limited as long as it is a time that can wash and remove oily stains and / or oil adhering to the object to be cleaned. By step (1A), oily stains and / or oil are removed from the object to be cleaned. Step (1A) may be composed of multiple cleaning tanks.

[0076] Step (1B) is a step of generating vapor containing component (A) from the solvent composition and contacting the object to be cleaned with the generated vapor containing component (A). If the solvent composition is an azeotropic composition, the "vapor containing (A)" refers to the vapor of the solvent composition. If the solvent composition is not an azeotropic composition, the solvent composition is heated so as to generate vapor containing at least (A). In step (1B), the object to be cleaned is brought into contact with the vapor generated from the solvent composition, thereby performing steam cleaning. The time for steam cleaning is not particularly limited, but can be from 1 second to 60 minutes. This exchanges the solvent composition and contaminant components adhering to the object to be cleaned with components in the vapor phase. Furthermore, since the object to be cleaned comes into contact with (A) in step (1B), rinsing (steam rinsing) is performed by the steam cleaning step.

[0077] An example of an apparatus used in such a method for cleaning an object by combining immersion cleaning and steam cleaning is a cleaning apparatus having a cleaning tank containing a cleaning agent in which the object is immersed, and a steam tank for generating cleaning agent vapor. Here, the cleaning agent used in the cleaning tank and the cleaning agent used in the steam tank may be the same or different. The cleaning agent vapor may also be generated from the cleaning tank. In this case, the cleaning tank doubles as the steam tank. In this case, the solvent composition contained in the cleaning tank is heated so that at least component (A) is boiled.

[0078] The cleaning time, which corresponds to the contact time between the solvent composition and the object to be cleaned, is not particularly limited as long as it is a time that can remove oily soil and / or oil from the substrate. For example, the cleaning time may be 10 seconds or more and 2 hours or less.

[0079] The cleaning agent is preferably a cleaning agent for use in the cleaning method including the above-mentioned steps (1A) and (1B). [Example]

[0080] 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.

[0081] (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 (parts by weight) in the table by using the following solvents as they were or by mixing the solvents.

[0082] 1. (A) 1-Bromo-2-methylpropane (a-1) 1-Bromo-2-methylpropane (a'-1) 1-Bromobutane (Tokyo Chemical Industry Co., Ltd.) (a'-2) 1-Bromohexane (Tokyo Chemical Industry Co., Ltd.)

[0083] 2. (B) Epoxides (b-1) 1,2-epoxybutane (manufactured by Tokyo Chemical Industry Co., Ltd., also known as 1,2-butylene oxide) (b-2) Cyclopentene oxide (Tokyo Chemical Industry Co., Ltd., also known as 1,2-epoxycyclopentane) (b-3) Methyl glycidyl ether (Tokyo Chemical Industry Co., Ltd.) (b-4) Ethyl glycidyl ether (Tokyo Chemical Industry Co., Ltd.) (b-5) 1,2-epoxycyclohexane (Tokyo Chemical Industry Co., Ltd.) (b-6) 1,2-epoxyhexane (Tokyo Chemical Industry Co., Ltd.) (b-7) Butyl glycidyl ether (Tokyo Chemical Industry Co., Ltd.) (b-8) Epichlorohydrin (Tokyo Chemical Industry Co., Ltd.) (b-9) Epibromohydrin (Tokyo Chemical Industry Co., Ltd.) (b-10) 1,2-epoxypentane (Tokyo Chemical Industry Co., Ltd.) (b-11) Isopropyl glycidyl ether (Tokyo Chemical Industry Co., Ltd.)

[0084] 3. (C) Nitroalkanes (c-1) Nitromethane (Tokyo Chemical Industry Co., Ltd.) (c-2) Nitroethane (Fujifilm Wako Pure Chemical Industries, Ltd.) (c-3) 1-Nitropropane (Tokyo Chemical Industry Co., Ltd.)

[0085] 4. (D) Other ingredients (d1) Alcohols (d1-1) Solmix AP-1 (manufactured by Japan Alcohol Sales Co., Ltd., ethanol 85.5% by weight, 2-propanol 13.4% by weight, methanol 1.1% by weight, water 0.2% by weight or less) (d1-2) 1-propanol (Tokyo Chemical Industry Co., Ltd.) ·(d2)Fragrance ingredients (d2-1) D-Limonene (Tokyo Chemical Industry Co., Ltd., (+)-Limonene) (d3) Esters (d3-1) Dimethyl carbonate (Tokyo Chemical Industry Co., Ltd.) (d3-2) γ-butyrolactone (Tokyo Chemical Industry Co., Ltd.) (d4) Hydrocarbons (d4-1) Daphne Alpha Cleaner MX (manufactured by Idemitsu Kosan Co., Ltd., 2,2,4,6,6-pentamethylheptane 90% by weight or more and 100% by weight or less, isoparaffin (C10-C13) 0.1% by weight or more and less than 1% by weight, synthetic hydrocarbons less than 10% by weight) (d4-2) Daphne Alpha Cleaner L (manufactured by Idemitsu Kosan Co., Ltd., isooctane 80% by weight or more but less than 90% by weight, isononane 1% by weight or more but less than 10% by weight, isoheptane 1% by weight or more but less than 10% by weight, hexane 1% by weight or more but less than 10% by weight, synthetic hydrocarbons less than 1% by weight) (d5) Glycol ethers (d5-1) Propylene glycol monomethyl ether (Tokyo Chemical Industry Co., Ltd., 1-methoxy-2-propanol) (d6) Cyclic ethers (d6-1) 1,3-dioxolane (Tokyo Chemical Industry Co., Ltd.)

[0086] 5.Oil (1) Mineral oil (1): Pulley SF Oil (manufactured by Ozawa Kogyo Co., Ltd.) Petroleum hydrocarbons (including 90% by weight or more but less than 100% by weight of mineral oil, less than 10% by weight of lubricating oil additives, and less than 1% by weight of 2,6-ditertiarybutyl-4-cresol) (2) Mineral oil (2): Daphne Mag Plus ST25 (manufactured by Idemitsu Kosan Co., Ltd.) (hydrogenated low-viscosity paraffin 90% by weight or more and 100% by weight or less, sulfurized oils and fats 1% by weight or more and less than 10% by weight, hydrogenated medium-viscosity paraffin 1% by weight or more and less than 10% by weight, 2,6-di-tert-butyl-4-cresol 0.1% by weight or more and less than 1% by weight, solvent-dewaxed heavy paraffinic petroleum fraction 0.1% by weight or more and less than 1% by weight, lubricating oil additives less than 2% by weight) (3) Vegetable oil: Edible olive oil (AJINOMOTO Extra Virgin Olive Oil, manufactured by J-Oil Mills, Inc.) (4) Silicone oil: Dimethyl silicone oil 350CS (Dow Corning Toray Co., Ltd., DOW CORNING® 360 MEDICAL FLUID, viscosity 350 cSt) (5) Maki Pen: Permanent marker Hi-Maki Black (Zebra Corporation)

[0087] [Test Example 1] Liquid coloration confirmation test Each metal plate was cut to the specified size (1.0mm x 8.0mm x 60mm, except for ADC12, which was 2.0mm x 8.0mm x 60mm, with a 3Φ (3mm diameter) hole 5mm from the top) and used for the test. After polishing the surface of each metal plate with #220 metal sandpaper, the test specimen was immersed in acetone and exposed to ultrasound (oscillation frequency 40kHz, high frequency output 130W) for 5 minutes to remove metal powder. The ultrasonically treated test specimen was then air-dried before being used for the test.

[0088] 100 ml of each solvent composition was placed in a round-bottom flask connected to a condenser and heated using a mantle heater. One test piece (five test pieces for SUS304 only) threaded with a nylon thread was placed at the top of the condenser and secured so that it straddled both the gas and liquid phases. Refluxing was carried out for five hours. The degree of coloration of each composition after refluxing was evaluated as follows based on JIS K 0071-1 (Determination of Color of Chemical Products - Part 1: Hazen Unit Color Index).

[0089] (metal plate) Iron: SPCC (JIS, G, 3141) (manufactured by Iwata Seisakusho Co., Ltd.) Stainless steel: SUS304 (JIS, G, 4305) (manufactured by Iwata Seisakusho Co., Ltd.) Copper: C1020P (JIS H 3100) (manufactured by Test Piece Co., Ltd.) Aluminum: A1100P (JIS H 4000) (manufactured by Test Piece Co., Ltd.) Aluminum die-cast: ADC12 (JIS, H, 5302) (manufactured by Test Piece Co., Ltd.)

[0090] (Judgment criteria) ◎: The solution was thinner than APHA100. Also, no significant corrosion reaction was observed on the metal plate. ○: The solution was as thick as APHA100 or thicker than APHA100, but thinner than APHA200. No significant corrosion reaction was observed on the metal plate. △: The liquid was as thick as APHA200 or thicker than APHA200, but thinner than APHA500. ×: The liquid was as thick as APHA500 or thicker than APHA500, or the test was stopped midway due to a corrosion reaction between the liquid and the metal.

[0091] [Test Example 2] Degreasing performance confirmation test Oil dissolution tests and oil cleaning tests were conducted on mineral oil (1), silicone oil, and vegetable oil to evaluate the degreasing performance.

[0092] (Oil solubility test) 0.15 g of oil was placed in a test tube (volume: 4 ml, 10 × 75 mm, made of PYREX (registered trademark)). Next, 3 g of the solvent composition at room temperature (approximately 20 ° C.) was placed in the test tube. The state of the oil was observed after stirring 10 times using a Pasteur pipette to evaluate the oil solubility.

[0093] (Oil cleaning test) A SUS304 plate (manufactured by Iwata Seisakusho Co., Ltd., 35 mm x 15 mm x 0.1 mm) was immersed in each oil and removed after 5 minutes to serve as a cleaning test sample. A US-13KS ultrasonic cleaner (manufactured by SND Corporation, oscillation frequency: 38 kHz, high-frequency output: 360 W) was filled with tap water and adjusted to a water temperature of approximately 40°C. 50 mL of the cleaning composition was placed in a 100 mL beaker, sealed with aluminum foil, and immersed in the ultrasonic cleaner to adjust the temperature of the cleaning composition to approximately 40°C. The cleaning test sample was then immersed in the cleaning composition under ultrasonic generation. After 1 minute, the test sample was removed from the beaker and immersed under ultrasonic generation in 50 mL of a rinse-cleaning solvent composition with the same composition as the cleaning composition, which had been prepared in a separate 100 mL beaker and was kept at a temperature of approximately 40°C. After 1 minute, the test sample was removed from the liquid and allowed to dry naturally. The surface of the test sample was then observed with the naked eye or using an HDMI digital stereo microscope STZ-161-TLED1080M (Shimadzu Rika Co., Ltd.). Grades of ◎ to ○ indicate that the sample can be used as a cleaning agent. (Judgment criteria) ⊚: In the oil dissolving test, the surface became uniformly transparent, and in the oil washing test, no oil stains were observed. ○: Cloudiness or separation was observed in the oil dissolution test, but no oil stains were observed in the oil washing test. ×: Cloudiness or separation was observed in the oil dissolution test, and obvious oil stains were observed in the oil washing test.

[0094] [Test Example 3] Hand wipe test A cleaning test sample was prepared by dropping 0.1 g of mineral oil (1) onto the surface of a SUS304 plate (manufactured by Iwata Seisakusho Co., Ltd., 100 mm x 100 mm x 0.1 mm) or by drawing a straight line with a marker pen. A set of two-ply tissue paper (manufactured by Oji Nepia Co., Ltd.) measuring 65 mm long and 72 mm wide was folded in quarters, soaked in the cleaning composition of each Example, and squeezed once between the thumb and index finger. The tissue paper soaked in each solvent composition was brought into contact with the surface of the SUS304 plate and wiped by rubbing with the hand. ◎~● can be used as a cleaning agent.

[0095] (Mineral oil (1)) ◎: The SUS plate surface was visually cleaned after wiping twice. ○: The SUS plate surface was visually cleaned after wiping three times. ●: After wiping four times, some small oil stains were found, but the surface was generally clean. ×: Even after wiping four times, there was still obvious oil staining.

[0096] (Macky Pen) ⊚: After wiping three times, no traces of the marker pen were visible and the surface was clean. ○: After wiping four times, no traces of the marker pen were visible and the surface was clean. ×: Even after wiping four times, clear traces of the marker pen were observed.

[0097] [Test Example 4] Deflux cleaning test Test Example 4-1: Flux Cleaning Test (1) (1) Preparation of cleaning test samples A lead-free solder paste for SMT (surface mounting) was applied to a galvanized steel plate (JIS G3302 equivalent, 30 mm long, 30 mm wide, 0.3 mm thick) through a metal mask, and the plate was placed on a hot plate at approximately 180°C for 3 minutes, followed by a hot plate at approximately 250°C for 5 minutes. The plate was then cooled to room temperature (approximately 20°C) and left for 2 days to obtain a cleaning test sample (an object to be cleaned with rosin-containing cream solder stains attached).

[0098] (2) Cleaning test An ultrasonic cleaner US-13KS (oscillation frequency: 38 kHz, high-frequency output: 360 W) manufactured by SND Corporation was filled with tap water and the water temperature was adjusted to approximately 40°C. 50 mL of the solvent composition was placed in a 100 mL beaker, sealed with aluminum foil, and immersed in the ultrasonic cleaner to adjust the liquid temperature of the solvent composition to approximately 40°C. The cleaning test sample was then immersed in the solvent composition while ultrasonically generated. After 3 minutes, the test sample was removed from the beaker and immersed in 50 mL of a rinsing solvent composition with the same composition as the solvent composition, which had been prepared in a separate 100 mL beaker and had a liquid temperature of approximately 40°C, while ultrasonically generated. After 1 minute, the test sample was removed from the liquid, allowed to air dry, and the surface of the test sample was observed with the naked eye. The results indicated that the level of the solvent composition was not detrimental to practical use. ◎: No white residue is observed even when observed under a microscope. ○: No white residue was visible to the naked eye, but a very small amount of white residue was visible under a microscope. However, it was at a level that did not adversely affect practical use. Extending the ultrasonic cleaning time from 3 minutes to 6 minutes resulted in an ◎ rating. ●: A very small amount of white residue was visible to the naked eye, but it was at a level that did not adversely affect actual use. By extending the ultrasonic cleaning time from 3 minutes to 9 minutes, the product was rated as ◎. ×: White residue was easily observed with the naked eye, and was at a level that adversely affected practical use.

[0099] Test Example 4-2: Flux Cleaning Test (2) (1) Preparation of cleaning test samples A lead-free solder paste for SMT (surface mounting) was applied to a galvanized steel plate (JIS G3302 equivalent, 30 mm long, 30 mm wide, 0.3 mm thick) through a metal mask. The plate was then placed on a hot plate at approximately 180°C for 3 minutes, followed by a hot plate at approximately 250°C for 60 minutes. The plate was then cooled to room temperature (approximately 20°C) and left for 7 days to obtain a cleaning test sample (an object stained with rosin-containing cream solder). This cleaning test sample was more difficult to clean than the sample in "Test Example 4-1: Flux Cleaning Test (1)" because the flux components were more firmly attached.

[0100] (2) Cleaning test An ultrasonic cleaner US-13KS (oscillation frequency: 38 kHz, high-frequency output: 360 W) manufactured by SND Corporation was filled with tap water and the water temperature was adjusted to approximately 40°C. 50 mL of the solvent composition was placed in a 100 mL beaker, sealed with aluminum foil, and immersed in the ultrasonic cleaner to adjust the liquid temperature of the solvent composition to approximately 40°C. The cleaning test sample was then immersed in the solvent composition while ultrasonically generated. After 3 minutes, the test sample was removed from the beaker and immersed in 50 mL of a rinsing solvent composition with the same composition as the solvent composition, which had been prepared in a separate 100 mL beaker and had a liquid temperature of approximately 40°C, while ultrasonically generated. After 1 minute, the test sample was removed from the liquid, allowed to air dry, and the surface of the test sample was observed with the naked eye. The results indicated that the level of the solvent composition was not detrimental to practical use. ⊚: No white residue was observed under a microscope. ○: No white residue was visible to the naked eye, but a very small amount of white residue was visible under a microscope. However, it was at a level that did not adversely affect practical use. Extending the ultrasonic cleaning time from 3 minutes to 6 minutes resulted in an ◎ rating. ●: A very small amount of white residue was visible to the naked eye, but it was at a level that did not adversely affect actual use. By extending the ultrasonic cleaning time from 3 minutes to 9 minutes, the product was rated as ◎. ×: White residue was easily observed with the naked eye, and was at a level that adversely affected practical use.

[0101] [Test Example 5] Uncured resin dissolution test A 210 ml PET cup (Takeuchi Sangyo Co., Ltd., Plastic Cup PET Clear Cup) was filled with 1.0 g of uncured epoxy resin (a 1:1 mixture of the base agent and curing agent of the high-performance epoxy-based strong adhesive Araldite® Standard, Huntsman Japan Co., Ltd.) or uncured urethane resin (LOCTITE Green Foam Urethane, Henkel Japan Co., Ltd.), and immediately thereafter, 10 g of each solvent composition was added and mixed 10 times with disposable chopsticks to evaluate solubility. For each resin, if the solvent composition was within the range of ◎ to ●, no resin adhered to the inner wall of the cup after transfer from the cup to another container, indicating its usability as a cleaning agent. While a test result of ◎ is most desirable in terms of dissolving power, a test result of ○ or ● may indicate that filtering the solvent composition after cleaning can remove some of the resin, making it easier to reuse the solvent composition.

[0102] (epoxy soluble) ◎: The mixture became clear or cloudy. ○: Some of the material did not mix, but the insoluble matter formed fine clumps and floated in the liquid. ●: Some of the material did not mix, but the insoluble matter formed large clumps and floated in the liquid. ×: Not mixed and stuck to the inner wall of the cup.

[0103] (urethane solubility) ◎: Dissolved and became transparent. ○: Mixed but cloudy. ●: Some of the insoluble matter did not mix, but it formed balls and floated in the liquid. ×: Not mixed and stuck to the inner wall of the cup.

[0104] [Test Example 6] Aerosol cleaning test 0.1 g of mineral oil (2) was dropped onto a 100 mm x 100 mm section on a SUS430 flat plate (Hikari Corporation, 400 mm x 300 mm x 1 mm) and spread evenly using a round brush No. 3 (horsehair). 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 filled with nitrogen gas (0.6 MPa). (Test Method) The aerosol composition was sprayed for 10 seconds from a distance of 50 cm from the test sample. (Test results) ○: Oil was removed from the section where oil was applied with the naked eye. ×: Remaining oil was observed with the naked eye in the section where the oil was applied.

[0105] [Test Example 7] Degreasing and cleaning test Each test piece (silver, zinc, magnesium, PET, PP) was immersed in mineral oil (1) and removed after 5 minutes to serve as a cleaning test sample. An ultrasonic cleaner US-13KS (oscillation frequency: 38 kHz, high-frequency output: 360 W) manufactured by SND Corporation was filled with tap water. 50 mL of the cleaning composition was placed in a 100 mL beaker, and the cleaning test sample was immersed in the cleaning composition at a liquid temperature of approximately 20°C under ultrasonic waves. After 1 minute, the test sample was removed from the beaker and immersed in 50 mL of a rinse solvent composition with the same composition as the cleaning composition, which had been prepared in a separate 100 mL beaker and was kept at a liquid temperature of approximately 20°C under ultrasonic waves. After 1 minute, the test sample was removed from the liquid, allowed to dry naturally, and then the surface of the test sample was visually observed.

[0106] (Test piece) Silver: 10mm x 10mm x 0.1mm (Kenis Co., Ltd.) Zinc: 14mm x 45mm x 0.5mm (Kenis Co., Ltd.) Magnesium: 14mm x 45mm x 0.5mm (Kenis Co., Ltd.) PET: 10mm x 45mm x 2mm (Takiron C.I. Co., Ltd.) PP: 10mm x 45mm x 1mm (As One Corporation) (Judgment criteria) ○: No oil stains were observed. ×: Obvious oil stains were observed.

[0107] The results are summarized in the table below.

[0108] [Table 1]

[0109] [Table 2]

[0110] [Table 3]

[0111] [Table 4]

[0112] [Table 5]

[0113] [Table 6]

[0114] [Table 7]

[0115] [Table 8]

[0116] [Table 9]

[0117] [Table 10]

[0118]

Table 11

[0119]

Table 12

[0120]

Table 13

[0121]

Table 14

[0122]

Table 15

[0123] Table 16

[0124]

Table 17

[0125]

Table 18

[0126] Table 19

[0127] Table 20

[0128] Table 21

[0129] Table 22

[0130] Table 23

[0131] Table 24

[0132] Table 25

[0133] Table 26

[0134] Table 27

[0135] Table 28

[0136] Table 29

[0137] Table 30

[0138] Table 31

[0139] Table 32

[0140]

Table 33

[0141] Table 34

[0142] Table 35

[0143] Table 36

[0144] Table 37

[0145] Table 38

[0146] Table 39

[0147] Table 40

[0148] Table 41

[0149] [Table 42]

[0150] The solvent compositions of the examples showed reduced coloration during use and / or storage. Furthermore, the solvent compositions of the examples also showed excellent detergency against mineral oils when used as aerosol compositions. As shown in Table 1, the solvent compositions of the comparative examples were confirmed to have discolored the liquid. Discoloration of the liquid was particularly pronounced when the solvent compositions consisted solely of component (A) (Comparative Examples 1 and 20), when the content of component (C) was low (Comparative Examples 2 to 11 and 21 to 30), when the solvent compositions contained only component (d6) (Comparative Examples 12 to 16 and 31 to 35), and when a bromine-based solvent different from component (A) was used instead of component (A) (Comparative Examples 17 to 19 and 36 to 38). The aluminum test of Comparative Example 23 corresponds to No. 2 of JP-A-7-150196, but the test had to be stopped midway due to a corrosion reaction between the liquid and the metal. A comparison of Example 1 with Examples 2 to 9 shows that when the content of component (B) was favorable, the coloring of the solution was further reduced. Furthermore, the combination of components (A) and (B) reduced the coloring of the solvent composition during use and / or storage. Therefore, as shown in Examples 860 to 866, for example, even when the solvent composition contained about 400 parts by weight of a component other than components (A) and (B) per 100 parts by weight of component (A), it was found that the coloring caused by component (A) could be reduced.

[0151] When the content of component (C) was 20 parts by weight or more per 100 parts by weight of component (A), the cleaning ability for epoxy resins or urethane resins was excellent, and when the content of component (C) was 100 parts by weight or less per 100 parts by weight of component (A), the solubility in oil was excellent. When the cleaning solvent composition further contained component (d1), there was a tendency for the cleaning ability to be improved for the marker pen of Test Example 3, the flux of Test Example 4, and the epoxy resin or urethane resin of Test Example 5. Furthermore, for example, a comparison of Examples 797 to 803 showed that when the content of component (d1) was 100 parts by weight or less per 100 parts by weight of component (A), the oil solubility or flux cleaning ability was excellent. When the cleaning solvent composition further contained component (d3), there was a tendency for the cleaning ability for the epoxy resin or urethane resin in Test Example 5 to be improved. Also, for example, a comparison of Examples 804 to 810 showed that when the content of component (d3) was 300 parts by weight or less (preferably 200 parts by weight or less) per 100 parts by weight of component (A), the solubility in oil was excellent. For example, a comparison of Examples 635 to 644 revealed that when the content of component (d4) was 200 parts by weight or less per 100 parts by weight of component (A), the flux removal properties were excellent. When the cleaning solvent composition further contained component (d5), there was a tendency for the cleaning ability to be improved for the marker pen of Test Example 3, the flux of Test Example 4, and the epoxy resin or urethane resin of Test Example 5. Furthermore, for example, a comparison of Examples 645 to 652 showed that when the content of component (d5) was 200 parts by weight or less (preferably 100 parts by weight or less) per 100 parts by weight of component (A), the oil solubility or flux cleaning ability was excellent.

Claims

1. (A) 1-bromo-2-methylpropane; and (B) epoxides, optionally, (C) nitroalkanes; and optionally containing one or more (D) other components selected from the group consisting of (d1) alcohols (excluding (d2) fragrance components and (d5) glycol ethers), (d2) fragrance components, (d3) esters, (d4) hydrocarbons (excluding (d2) fragrance components), (d5) glycol ethers, and (d6) cyclic ethers (excluding epoxides); A cleaning solvent composition comprising: the component (B) is at least one selected from the group consisting of 1,2-butylene oxide, cyclopentene oxide, methyl glycidyl ether, ethyl glycidyl ether, 1,2-epoxycyclohexane, 1,2-epoxyhexane, butyl glycidyl ether, epibromohydrin, 1,2-epoxypentane, and isopropyl glycidyl ether; the content of the (B) component is 0.1 parts by weight or more and 20 parts by weight or less relative to 100 parts by weight of the (A) component, When the total amount of the solvent composition is 100 parts by weight, the content of the component (A) is 20 parts by weight or more, When the total amount of the solvent composition is 100 parts by weight, the total content of the components (A) to (D) is 90 parts by weight or more and 100 parts by weight or less. Cleaning solvent compositions (excluding cleaning solvent compositions containing trichlorodifluoroethane).

2. A cleaning solvent composition as described in claim 1, which contains (C) a nitroalkane, and the content of component (C) is 20 parts by weight or more and 200 parts by weight or less per 100 parts by weight of component (A).

3. A cleaning solvent composition according to claim 1 or 2, which contains (D) other components, and the content of component (D) is 5 parts by weight or more and 300 parts by weight or less per 100 parts by weight of component (A).

4. The cleaning solvent composition according to any one of claims 1 to 3, 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, and resin are attached.

5. The cleaning solvent composition according to any one of claims 1 to 4, which is a cleaning agent for use as a hand wiping detergent.

6. 6. A cleaning aerosol composition comprising the cleaning solvent composition according to claim 1 and a propellant gas.

7. The cleaning solvent composition according to any one of claims 1 to 4, which is a cleaning agent for use in a method for cleaning an object to be cleaned, comprising: step (1A): a step of immersing an object to be cleaned in the cleaning solvent composition according to any one of claims 1 to 4; and step (1B): a step of generating steam containing the component (A) from the cleaning solvent composition according to any one of claims 1 to 4, and bringing the object to be cleaned into contact with the generated steam containing the component (A).

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