Solvent composition

Abstract

To provide a solvent composition which can cope with a wide range of stains from water-soluble to oil-soluble, has a small environmental load, and has high safety.SOLUTION: The composition comprises (A) at least one selected from the group consisting of (E) -1-chloro - 2,3,3 - trifluoropropene and (Z) -1-chloro - 2,3,3 - trifluoropropene and (B) a monohydric glycol ether having a boiling point of ≤ 180 °C. A total content of 1233zd (Z) (Z-isomer of HCFO - 1233zd (CF3 - CH = CHCl) ((Z) - 1-chloro - 333 - trifluoropropene)) and 1223za (HCFO - 1223za (CF3 - CH = CCl2) (1, 1-dichloro - 333 - trifluoropropene)) is less than 30 mass%.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a solvent composition. [Background technology]

[0002] Resin materials such as urethane resins and epoxy resins are used in a wide range of industrial fields due to their excellent physical and chemical properties. Cleaning of the manufacturing equipment and tools for these resin materials is an important factor that directly affects the efficiency of the manufacturing process and the quality of the product. The dispensers, piping, manufacturing furnaces, molds, etc. used in the manufacturing process of products using these resin materials are cleaned after use.

[0003] In conventional cleaning processes, chlorinated solvents such as methylene chloride and trichloroethylene have been widely used due to their excellent dissolving power and fast drying properties. However, these chlorinated solvents are highly toxic and pose serious health risks to workers. Furthermore, they have a significant negative impact on the environment, making their use discouraged in sustainable manufacturing processes.

[0004] In addition, flammable solvents such as acetone and thinner are also widely used, but because these are highly flammable, there are serious safety concerns when using them, such as the risk of fire or explosion.

[0005] Furthermore, the use of high-boiling point solvents can cause poor drying properties, resulting in residual solvent remaining in the product during the manufacturing process, which can cause quality problems such as poor urethane curing and foaming.

[0006] Fluorinated solvents have been considered a promising alternative to mitigate these problems from the standpoints of their toxicity to the human body and safety under fire protection laws.

[0007] As a cleaning agent that solves the above problems, Patent Document 1 discloses a solvent composition containing at least one fluoropropene compound selected from the group consisting of 1233zd(Z) (the Z form of HCFO-1233zd(CF3-CH=CHCl) ((Z)-1-chloro-3,3,3-trifluoropropene)) and 1223za (HCFO-1223za(CF3-CH=CCl2)(1,1-dichloro-3,3,3-trifluoropropene)), and an organic compound having an ether bond and having a specific vapor pressure. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 6813499 Summary of the Invention [Problem to be solved by the invention]

[0009] However, when a cleaning agent consists solely of a fluorine-based solvent, it lacks cleaning power and dissolving power, and is also hydrophobic, so it often does not achieve sufficient effectiveness, especially when it comes to water-soluble dirt. Furthermore, 1233zd(Z) and 1223za described in Patent Document 1 are internationally designated PFAS (perfluoroalkyl and polyfluoroalkyl compounds) and are subject to regulation from the perspective of environmental impact. Furthermore, the "dipropylene glycol monomethyl ether" described in Example 41 of Patent Document 1 has a boiling point of approximately 187°C and suffers from the problem of poor drying properties.

[0010] Therefore, an object of the present invention is to provide a solvent composition that can be used on a wide range of stains, from water-soluble to oil-soluble, and that has a low environmental impact and is highly safe.

[0011] The present invention has the following configuration. [1] (A) at least one selected from the group consisting of (E)-1-chloro-2,3,3-trifluoropropene and (Z)-1-chloro-2,3,3-trifluoropropene; (B) Contains monohydric glycol ethers having a boiling point of 180°C or less, A solvent composition having a total content of 1233zd(Z) (the Z form of HCFO-1233zd(CF3-CH=CHCl) ((Z)-1-chloro-3,3,3-trifluoropropene)) and 1223za (HCFO-1223za(CF3-CH=CCl2)(1,1-dichloro-3,3,3-trifluoropropene)) of less than 30% by mass. [2] The solvent composition according to [1], wherein component (B) is at least one selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monopropyl ether, propylene glycol mono-n-butyl ether, ethylene glycol monoisobutyl ether, 3-methoxy-3-methyl-1-butanol, and ethylene glycol monoallyl ether. [3] The solvent composition according to [1] or [2], further comprising one or more (C) additional solvents selected from the group consisting of (C-1) trans-1,2-dichloroethylene and (C-2) esters. [4] The solvent composition according to any one of [1] to [3], wherein the component (C-2) is at least one member selected from the group consisting of dimethyl carbonate, γ-butyrolactone, and ε-caprolactone. [5] The solvent composition according to any one of [1] to [4], for dissolving one or more members selected from the group consisting of polyols, polyisocyanates, uncured urethane resins, and uncured epoxy resins. [6] The solvent composition according to any one of [1] to [4], which is a cleaning agent for cleaning an object to be cleaned having attached thereto one or more substances selected from the group consisting of oily stains, oil, flux, polyol, polyisocyanate, and resin. [7] The solvent composition according to any one of [1] to [4], which is a cleaning agent for use as a wiping cleaner. [8] A method for cleaning a two-component resin mixing and dispensing machine, characterized by using the solvent composition according to any one of [1] to [4] as a cleaning agent. [9] The two-component resin mixer / dispenser has a tank, a pipe, and a mixing nozzle, The method comprises the following steps 1 to 4: Step 1: Supplying a cleaning agent into a two-component resin mixer / dispenser; Step 2: cleaning the inside of the tank, piping, and / or mixing nozzle with the cleaning agent supplied in Step 1; Step 3: Discharging the cleaning agent; and Step 4: Optionally, drying the inside of the tank, piping, and / or mixing nozzle by air blowing, spraying, and / or rinsing with a rinse agent; The cleaning method according to [8], comprising: [Effects of the Invention]

[0012] The present invention provides a solvent composition that can be used on a wide range of stains, from water-soluble to oil-soluble, and that is environmentally friendly and highly safe. DETAILED DESCRIPTION OF THE INVENTION

[0013] (Definition of terms) "(A) at least one selected from the group consisting of (E)-1-chloro-2,3,3-trifluoropropene and (Z)-1-chloro-2,3,3-trifluoropropene" may be referred to as "component (A)" or "(A)." The same applies to other components. With regard to numerical ranges, "to" means that both ends of the range are included. For example, "5 to 40 parts by mass" means "5 parts by mass or more and 40 parts by mass or less." Furthermore, "or less" means "the same as or less than," and "or more" means "the same as or greater than."

[0014] [Solvent composition] The solvent composition contains (A) at least one selected from the group consisting of (E)-1-chloro-2,3,3-trifluoropropene and (Z)-1-chloro-2,3,3-trifluoropropene, and (B) a monovalent glycol ether having a boiling point of 180°C or lower, and the total content of 1233zd(Z) (the Z isomer of HCFO-1233zd(CF3-CH=CHCl) ((Z)-1-chloro-3,3,3-trifluoropropene)) and 1223za (HCFO-1223za(CF3-CH=CCl2)(1,1-dichloro-3,3,3-trifluoropropene)) is less than 30% by mass.

[0015] [(A)(E)-1-chloro-2,3,3-trifluoropropene, (Z)-1-chloro-2,3,3-trifluoropropene] Component (A) is at least one selected from the group consisting of (E)-1-chloro-2,3,3-trifluoropropene and (Z)-1-chloro-2,3,3-trifluoropropene. Component (A) does not contain a perfluoromethyl group (a completely fluorinated methyl group), and therefore has a low environmental impact. Component (A) is also a component that is not subject to PFAS regulations. Component (A) can be a main component of the solvent composition together with component (B). Component (A) is a component that can increase the dissolving power of oil-soluble components and improve the safety of the solvent composition under the Fire Service Act. Component (A) also imparts drying properties to the solvent composition. Component (A) may be one kind of component or a combination of two or more kinds of components.

[0016] [(B) Monovalent glycol ethers having a boiling point of 180°C or less] Component (B) is a monovalent glycol ether having a boiling point of 180°C or lower. That is, component (B) is a glycol ether having one alcoholic hydroxyl group in one molecule. The solvent composition contains component (B) having a boiling point of 180°C or lower, and therefore has excellent drying properties. If the boiling point of component (B) exceeds 180°C, the drying properties tend to be poor. The boiling point of component (B) is preferably 120 to 180°C, and particularly preferably 120 to 150°C.

[0017] Examples of component (B) include monoalkyl ethers of monopropylene glycol, monoalkyl ethers or monoallyl ethers of ethylene glycol, and other monovalent glycol ethers.

[0018] Examples of the monoalkyl ether of monopropylene glycol include propylene glycol monomethyl ether, propylene glycol monopropyl ether, and propylene glycol mono-n-butyl ether.

[0019] Examples of the monoalkyl ether or monoallyl ether of ethylene glycol include ethylene glycol monoisobutyl ether and ethylene glycol monoallyl ether.

[0020] Other monovalent glycol ethers include 3-methoxy-3-methyl-1-butanol.

[0021] Component (B) is preferably at least one selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monopropyl ether, propylene glycol mono-n-butyl ether, ethylene glycol monoisobutyl ether, 3-methoxy-3-methyl-1-butanol, and ethylene glycol monoallyl ether. Component (B) may be one kind of component or a combination of two or more kinds of components.

[0022] [1233zd(Z) and 1223za] The solvent composition has a total content of 1233zd(Z) and 1223za of less than 30% by mass. The solvent composition may contain 1233zd(Z) and 1223za as impurities. 1233zd(Z) and 1223za are fluorine compounds containing perfluoromethyl groups (fully fluorinated methyl groups) and are considered to have a large environmental impact. Therefore, a solvent composition having a total content of 1233zd(Z) and 1223za of less than 30% by mass has a smaller environmental impact and is safer than a solvent composition containing 1233zd(Z) and 1223za as the main component (for example, a solvent composition having a total content of 1233zd(Z) and 1223za of 50% by mass or more of the solvent composition).

[0023] In addition, because the solvent composition has a low environmental impact, it can be a solvent composition that complies with PFAS regulations. "PFAS" follows the definition of the OECD (Organization for Economic Cooperation and Development) in 2021. That is, "PFAS" means "fluorinated substances containing one or more fully fluorinated methyl or methylene groups (carbon atoms to which fluorine is bonded that have no H, Cl, Br, or I atoms bonded)."

[0024] [Components other than component (A) and component (B)] The solvent composition may contain components other than component (A) and component (B) as long as the effects of the present invention are not impaired. Such components include (C) an additional solvent and (D) an additive.

[0025] <(C) Further Solvent> Examples of the (C) additional solvent include (C-1) trans-1,2-dichloroethylene, (C-2) esters, and (C-3) other solvents. From the viewpoint of dissolving power, the component (C) is preferably one or more selected from the group consisting of (C-1) trans-1,2-dichloroethylene and (C-2) esters.

[0026] (C-1) trans-1,2-dichloroethylene is a hydrochloroolefin containing a hydrogen atom.

[0027] The (C-2) esters do not have an ether bond. Examples of component (C-2) include monoester solvents, ester solvents having two carbonyl groups, carbonate ester solvents, and cyclic ester solvents. Specific examples of component (C-2) 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 acetoacetate, γ-butyrolactone, diethyl carbonate, dimethyl oxalate, and diethyl oxalate. From the viewpoint of dissolving power, the component (C-2) is preferably at least one selected from the group consisting of dimethyl carbonate, γ-butyrolactone, and ε-caprolactone. The component (C-2) may be one type or a combination of two or more types.

[0028] (C-3) Other solvents include nitro compounds, ethers, monohydric alcohols, amide compounds, chloroolefins, hydrobromocarbons, chlorinated hydrocarbons, etc. These are not particularly limited as long as they are components commonly used in the field of solvent compositions.

[0029] (C-3) Other solvents may be chlorofluoropropenes having a CF3 group and hydrochlorofluoropropenes having a CF3 group.

[0030] Chlorofluoropropenes having a CF group include CFO-1214ya (CF-CF=CCl), the E and Z isomers of CFO-1214xb (CF-CF=CClF), the E and Z isomers of CFO-1215yb (CF-CCl=CClF), and CFO-1215xc (CF-CCl=CF).

[0031] Hydrochlorofluoropropenes having a CF3 group include 1233zd(Z) and 1223za, as well as the E and Z isomers of HCFO-1223xd (CF3-CCl=CHCl), and HCFO-1233xf (CF3-CCl=CH2).

[0032] The component (C) may be one type or a combination of two or more types.

[0033] <(D) Additives> The additive (D) is not particularly limited as long as it is a component commonly used in the field of solvent compositions. Component (D) may be one or more selected from the group consisting of ultraviolet absorbers, antioxidants, stabilizers, rust inhibitors, antifoaming agents, surfactants, and chelating agents. Component (C) that acts as component (D) is also included in component (D). The component (D) may be one type or a combination of two or more types.

[0034] <Composition of Solvent Composition> In the solvent composition, the content of each component is as follows.

[0035] When the total of components (A) and (B) is 100 parts by mass, the content of component (A) is preferably 20 to 95 parts by mass, more preferably 30 to 90 parts by mass, and particularly preferably 50 to 80 parts by mass. When the content of component (A) is within this range, there is a tendency for the composition to have better solubility in oils and uncured resins, or to exhibit its effects as a solvent composition more efficiently.

[0036] When the total amount of the solvent composition is 100 parts by mass, the total amount of components (A) and (B) is preferably 50 to 100 parts by mass, more preferably 80 to 100 parts by mass, and particularly preferably 90 to 100 parts by mass. When the total amount of components (A) and (B) is within the above range, the solvent composition tends to exhibit its effects more efficiently. The remainder is made up of components (C) and (D).

[0037] In the solvent composition, the total content of 1233zd(Z) and 1223za is less than 30% by mass. That is, when the total amount of the solvent composition is 100 parts by mass, the total content of 1233zd(Z) and 1223za is less than 30 parts by mass. When the total content of 1233zd(Z) and 1223za in the solvent composition is 30% by mass or more, the solvent composition does not have a low environmental impact. From the viewpoint of further reducing the environmental impact, when the total amount of the solvent composition is 100 parts by mass, the total content of 1233zd(Z) and 1223za is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, even more preferably 1 part by mass or less, even more preferably 0.1 parts by mass or less, and particularly preferably 50 ppm or less. Furthermore, when the total amount of the solvent composition is 100 parts by mass, the total content of 1233zd(Z) and 1223za may be 0 ppm or more, 0.1 parts by mass or more, 1 part by mass or more, or an amount that constitutes an impurity (for example, 5 parts by mass or more). When the total amount of the solvent composition is 100 parts by mass, if the total content of 1233zd(Z) and 1223za is 50 ppm or less, it may be below the threshold of PFAS regulations, and the solvent composition may have an even smaller environmental impact.

[0038] Furthermore, when the total amount of the solvent composition is 100 parts by mass, the total content of chlorofluoropropenes having a CF3 group and hydrochlorofluoropropenes having a CF3 group is preferably 500 ppm or less, more preferably 150 ppm or less, and particularly preferably 50 ppm or less.

[0039] When the solvent composition contains component (C), the content of component (C) is preferably 50 parts by mass or less, more preferably 30 parts by mass or less, and particularly preferably 0 to 20 parts by mass, when the total amount of the solvent composition is 100 parts by mass. When the content of component (C) is within the above range, the effect of the solvent composition tends to be more efficiently exhibited.

[0040] When the solvent composition contains component (D), the content of component (D) is preferably 20 parts by mass or less, more preferably 10 parts by mass or less, and particularly preferably 0 to 10 parts by mass, when the total amount of the solvent composition is 100 parts by mass. When the content of component (D) is within the above range, the effect of the solvent composition tends to be more efficiently exhibited.

[0041] [Method of producing solvent composition] The method for producing the solvent composition is arbitrary. The raw material components contained in the solvent composition can be dissolved by a known method appropriately selected from the group consisting of, for example, stirring, mixing, dissolving, and dispersing. It can be produced by one or more means.

[0042] [Use of solvent composition: Dissolving agent] The solvent composition can be used as a solvent composition for dissolving one or more components selected from the group consisting of polyols, polyisocyanates, resins, oils, and fluxes, i.e., the solvent composition can be used as a dissolving agent for the components.

[0043] [Polyol] A polyol is a compound having two or more hydroxyl groups (-OH) in one molecule. Examples of polyols include glycols, polyether polyols, polyester polyols, polymer polyols, and other polyols. Examples of glycols include ethylene glycol, diethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, and tripropylene glycol. Examples of polyether polyols include poly(alkylene) glycols such as polyethylene glycol and polypropylene glycol, and low-molecular-weight compounds having two or more hydroxyl groups in the molecule, and poly(alkylene oxides) such as propylene oxide and ethylene oxide are added to ethylenediamine. Examples of polyester polyols include those obtained by condensing dibasic acids such as adipic acid and phthalic acid with polyhydric alcohols such as ethylene glycol, resulting in hydroxyl groups at the terminals. Examples of polymer polyols include those in which polystyrene or polyacrylonitrile is dispersed in a polyol. Other polyols include glycerides of fatty acids having hydroxyl groups and glycerin. Examples of the glyceride include castor oil and dehydrated castor oil, which also function as oils, as described below.

[0044] [Polyisocyanate] Polyisocyanates are compounds having two or more isocyanate groups (-NCO) in the molecule. Examples of polyisocyanates include tolylene diisocyanate, diphenylmethane diisocyanate, polymethylene polyphenylisocyanate, phenylene diisocyanate, 1,5-naphthylene diisocyanate, 3,3'-dichloro-4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, and bis(isocyanatomethyl)cyclohexane. Some of the polyisocyanates may have modified isocyanate groups. Polyisocyanates are components that react with water present in the surrounding environment to form polyurea, thereby providing a cured or semi-cured product.

[0045] 〔resin〕 The resin includes an uncured resin, a cured resin, and an uncured resin composition containing an additive blended into the resin, as well as a cured resin of the resin composition. The solvent composition can dissolve the uncured and cured resin of the resin composition containing the additive blended into the resin, and therefore the solvent composition can be a solubilizer for the additives contained in the resin composition. The cured resin also includes cured products that harden by accelerating the curing reaction of the resin, as well as cured products having elasticity such as elastomers, and solidified products that solidify due to the volatilization of additives blended into the resin, such as reactive diluents, and an increase in viscosity.

[0046] Examples of the resin include urethane resin, epoxy resin, polycarbonate resin, acrylonitrile-butadiene-styrene resin, acrylic resin, styrene resin, polyvinyl chloride resin, etc. Here, the uncured urethane resin and uncured epoxy resin are as described above.

[0047] Urethane resin The urethane resin includes uncured urethane resin and cured urethane resin.

[0048] The uncured urethane resin may be a composition containing a polyol and a polyisocyanate. In the uncured urethane resin, the polyol and the polyisocyanate may be partially reacted. Here, the polyol and the polyisocyanate are as described above.

[0049] The composition used as the raw material for the uncured urethane resin may contain additives depending on the purpose, such as catalysts, water, stabilizers, fillers, colorants, adhesion aids, acid acceptors, mold release agents, electrical conductivity imparting agents, thermal conductivity imparting agents, flexibility imparting agents, foaming agents, foam stabilizers, heat resistance improvers, and non-reactive compounds such as flame retardants.

[0050] The cured urethane resin may be a reaction product of a polyisocyanate and a polyol. The cured urethane resin may contain the additives described above for the uncured urethane resin.

[0051] Epoxy resin The epoxy resin includes uncured epoxy resin and cured epoxy resin.

[0052] Examples of uncured epoxy resins include epoxy resins or compositions containing epoxy resins and additives. Examples of 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 having a hydantoin ring. Examples of additives 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. Examples of epoxy resin curing agents include polyamines and acid anhydrides, which can be used appropriately depending on the type of epoxy resin used.

[0053] The cured epoxy resin may be a cured product of the uncured epoxy resin described above. The cured epoxy resin may contain the additives described above for the uncured epoxy resin.

[0054] Polycarbonate resin Polycarbonate resin is a type of thermoplastic plastic. The bonds between the monomer units are composed of carbonate groups (-O-(C=O)-O-).

[0055] Acrylonitrile butadiene styrene (ABS) resin Acrylonitrile-butadiene-styrene resin is an acrylonitrile-styrene copolymer, which is a copolymer of acrylonitrile and styrene with polybutadiene, a rubbery polymer, dispersed in it, and is composed mainly of the three components acrylonitrile, butadiene, and styrene.

[0056] Acrylic resin Examples of acrylic resins include polymers containing compounds having an acryloyl group and / or a methacryloyl group as monomer units.

[0057] -Styrofoam resin Styrene resin is a polymer made of styrene as a monomer, and its cured form is also called polystyrene. When the styrene resin is in a foam form, the cured foam is also called expanded polystyrene.

[0058] Polyvinyl chloride resin Polyvinyl chloride resins are homopolymers of vinyl chloride or copolymers of vinyl chloride with additional vinyl monomers.

[0059] Resin additives The resins described above may contain additives other than those mentioned above depending on the purpose, such as 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] In addition to the above, specific examples of the resin include ink such as oil-based or water-based markers, and writing implements containing any of the above resins.

[0061] 〔oil〕 Examples of oils include mineral oil, vegetable oil, animal oil, heavy oil, wax, and silicone oil. Note that the oil is not a polyol. 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.

[0062] The mineral oil is not particularly limited, and a commercially available product thereof is Pulley SF Oil (manufactured by Idemitsu Kosan Co., Ltd.). Examples of vegetable oils include olive oil, linseed oil, tung oil, sesame oil, safflower oil, soybean oil, cottonseed oil, coconut oil, corn oil, and palm oil. Fatty acids constituting vegetable oils are saturated or unsaturated C12 to 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.

[0063] Silicone oils have a main skeleton consisting of siloxane bonds. Silicone oils may be straight silicone oils such as dimethylsilicone oil, methylphenylsilicone oil, and methylhydrogensilicone oil. They may also be modified silicone oils in which other organic groups, such as carboxyl groups, amino groups, polyether groups, acrylic groups, or epoxy groups, are introduced into the side chains or terminals of 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.

[0064] 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.

[0065] [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).

[0066] 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.

[0067] The solvent composition is preferably used as a solvent composition for dissolving one or more components selected from the group consisting of polyol, polyisocyanate, uncured urethane resin, and uncured epoxy resin.

[0068] <Dissolution method> The method for dissolving the components using a solubilizer includes a step of contacting the components with the solubilizer. In the step of contacting the components with the solubilizer, the components are dissolved in the solubilizer. The contact time between the solubilizer and the components is not particularly limited as long as the desired effect can be achieved. The contact time is preferably 5 seconds to 24 hours, more preferably 10 seconds to 8 hours, and particularly preferably 10 minutes to 2 hours. The components can be sufficiently dissolved within the above range. All of the components may be dissolved to form a homogeneous phase with the solubilizer, or all or part of the components may be swollen by the solubilizer, forming a two-layer structure of the solubilizer and the swollen resin. It is preferable that all of the components are dissolved to form a homogeneous phase with the solubilizer. Furthermore, if the amount of the components to be dissolved exceeds the saturated solubility of the solubilizer, some of the components may remain undissolved.

[0069] The temperature of the dissolving agent when it is brought into contact with the component is not particularly limited, but is preferably 0 to 70°C, and particularly preferably 5 to 40°C.

[0070] [Use of solvent composition: cleaning agent] The solvent composition has excellent solubility for oil, flux, polyol, polyisocyanate, and resin, and can therefore be used as a cleaning agent for cleaning objects having one or more substances selected from the group consisting of oily stains, oil, flux, polyol, polyisocyanate, and resin attached thereto. Furthermore, the solvent composition has excellent solubility for resin compositions containing additives blended into resins, and therefore the solvent composition can also be used as a cleaning agent for additives contained in resin compositions. Furthermore, the solvent composition has excellent drying properties, and can therefore be used as a cleaning agent for cleaning objects having dust attached thereto. Here, the oil, flux, resin, polyol, and polyisocyanate are as described above.

[0071] <<Dust>> Dust is not particularly limited, and examples thereof include solid matter floating in the air (for example, solid particles of 5 mm or less).

[0072] <<Oily stains>> Oily stains include oil stains and resin stains. Oily stains may contain dust. The oils and resins that are the raw materials for oily stains are as described above. Oily stains include non-polar oily stains, oily stains caused by polar components, and oily stains caused by multiple components with different polarities, depending on the polarity of the oil. Furthermore, resin stains include non-polar resin stains, oily stains caused by polar components, and oily stains caused by multiple components with different polarities, depending on the polarity of the resin component and the components used in combination.

[0073] <Cleaning method> A cleaning method using a solvent composition (i.e., a method of using a cleaning agent) includes contacting the solvent composition with an object to be cleaned. The object to be cleaned has resin, oily stains, oil, and / or dust attached to its substrate. In the cleaning method, by contacting the solvent composition with the object to be cleaned, the resin, oily stains, oil, and / or dust attached to the substrate are removed from the substrate. The phenomenon of the solvent composition removing the cured resin attached to the substrate is believed to be due to the following: When the resin comes into contact with the solvent composition, all or part of the resin is dissolved and / or swelled and softened at the surface of the resin and / or the interface between the substrate and the resin, thereby reducing the adhesion between the substrate and the resin, thereby removing the resin. Note that when the oily stain contains solid stains such as dust, the solid stains can be removed simultaneously with the removal of the oily stains.

[0074] <Base material> The material of the substrate is not particularly limited, but examples include metals, fibers, glass, ceramics, elastomers, and plastics. Metals include silver, zinc, nickel, iron, aluminum, copper, manganese, magnesium, stainless steel, and aluminum alloys (alloys of aluminum and one or more metals consisting of copper, manganese, silicon, magnesium, zinc, and nickel). Elastomers include rubbers such as nitrile rubber, butyl rubber, natural rubber, styrene-butadiene rubber, isoprene rubber, butadiene rubber, chloroprene rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, and fluororubber. Plastics include polypropylene resin, polyethylene resin, and PET (polyethylene terephthalate) resin. The substrate may be plastic as long as the aforementioned oily stains, oil, resin, or dust can be removed from the substrate.

[0075] Specific examples of the substrate include devices and parts for obtaining a cured product of the resin, metal processed products, electric and electronic parts, optical parts, automobile parts, machine parts, semiconductor parts, and display parts.

[0076] Electrical and electronic components include wiring substrates such as printed circuit boards and ceramic substrates. Optical components include optical lenses (e.g., camera lenses) and components for optical lenses (e.g., camera housings). Automotive components include metal parts used for automobile shafts, frame components, exterior components, etc. Mechanical components include bearings for vacuum pumps, semiconductor manufacturing equipment, cleaning equipment, motors, fans, etc., bearings for precision machinery components such as watches, and rollers for printing presses. Semiconductor-related components include electronic components such as IC chips and resistors. Display components include liquid crystal substrates, organic EL substrates, inorganic EL substrates, etc. The shapes of these components are not limited to plate-like members, but can also be pipe-shaped members or elongated members with circular or rectangular cross sections, or members with other complex shapes.

[0077] The object to be cleaned may be an object for daily maintenance, that is, an object to be cleaned once or twice a day, or an object for overhaul, that is, an object to be cleaned once every six months to one year, for example.

[0078] The method for contacting the solvent composition with the object to be cleaned (i.e., the cleaning method) is not particularly limited, and examples thereof include wiping cleaning (including hand wiping cleaning and mechanical wiping cleaning), brush cleaning, immersion cleaning (liquid phase cleaning), steam cleaning (gas phase cleaning), spray cleaning (including spraying with a cleaning aerosol composition), shower cleaning, ultrasonic immersion cleaning, pouring cleaning, and combinations thereof. The cleaning method is preferably wiping cleaning. Therefore, the solvent composition is preferably a wiping cleaner.

[0079] Immersion cleaning involves immersing a part or all of an object to be cleaned in a solvent composition, thereby bringing the solvent composition into contact with the object to be cleaned, thereby cleaning the surface of the object. In immersion cleaning, in order to enhance the cleaning effect, means such as stirring, shaking, ultrasonic vibration, or air bubbling may be combined with immersion. The conditions for ultrasonic vibration and air bubbling can be appropriately set from known conditions.

[0080] A cleaning method using wiping cleaning includes cleaning the surface of an object to be cleaned by wiping using a solvent composition. A cleaning method using wiping cleaning is a cleaning method that provides a stronger cleaning effect than immersion cleaning due to the application of physical force by wiping. Examples of wiping cleaning include hand wiping and mechanical wiping cleaning. Hand wiping cleaning is not particularly limited, and may be performed by bringing paper, cotton, cloth, cotton swab, etc. soaked in the solvent composition into contact with the area where oily stains and / or oil are attached and rubbing with the hand; or by bringing paper, cotton, cloth, etc. soaked in the solvent composition into contact with the area where oily stains and / or oil are attached and rubbing with the hand using a plate or rod. Alternatively, after spraying the solvent composition, wiping with cotton, cloth, etc. may be performed. Mechanical wiping cleaning may be a cleaning method in which the above-mentioned hand wiping cleaning is performed mechanically. In wiping cleaning, the number of times the object to be cleaned is wiped is not particularly limited as long as it is enough to remove oily stains, oil, resin and / or dust adhering to the object to be cleaned, and may be one or more times.

[0081] A cleaning method using brush cleaning involves scrubbing the surface of the object to be cleaned using a solvent composition and a brush. Brush cleaning is a cleaning method that provides a stronger cleaning effect than immersion cleaning due to the physical force applied by the brush. Examples of brush cleaning include manual and mechanical brush cleaning. Brush materials may be chemical fibers, animal fibers, plant fibers, or metal wire. Examples of chemical fibers include nylon, polypropylene, polyethylene, polyester, vinyl chloride, Teflon (registered trademark), polyphenylene sulfide, and fluororesin, and may contain abrasive grains, copper sulfide, elenon emulsion, etc. Examples of animal fibers include horsehair, hog hair, wool, deer hair, and human hair. Examples of plant fibers include tampico, palm, fern, palm, calcaya, sisal, and palmyra. Examples of metal wire include hard steel wire, hardened wire, gold-plated wire, iron wire, stainless steel wire, brass wire, phosphor bronze, and beryllium copper. The cleaning may be carried out with a brush dipped in the solvent composition, or may be carried out with a brush after spraying.

[0082] The cleaning method by spray washing involves cleaning the surface of the object to be washed by spraying the solvent composition onto it. The cleaning method by spray washing is a cleaning method that has a stronger cleaning effect than immersion washing because a physical force is applied when the solvent composition is sprayed onto the surface of the object to be washed. In addition, since the solvent composition has an appropriate drying property, dirt can be efficiently lifted and removed during spray washing. Examples of methods for spraying the solvent composition onto the surface of the object to be washed include a method in which the solvent composition is dispensed into a container such as a bucket or a tub, a shower, a spray, a jet, an aerosol, etc.

[0083] 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 the components from the substrate. For example, the cleaning time may be 1 second or more and 2 hours or less. The temperature of the solvent composition in each cleaning is also not particularly limited, and may be -10°C or more and the boiling point of the solvent composition or less, and is preferably -5 to 50°C.

[0084] <Further Aspect of the Cleaning Method: Cleaning Method for Two-Component Resin Mixing and Dispensing Machine> The cleaning method may be a method for cleaning a two-component resin mixer / dispenser. The cleaning method for a two-component resin mixer / dispenser is characterized in that the above-mentioned solvent composition is used as a cleaning agent. The two-component resin can be appropriately selected from the above-mentioned resins. The resin used in the two-component resin mixer / dispenser is preferably a two-component urethane resin and / or a two-component epoxy resin.

[0085] Examples of two-component resin mixer / dispenser include a device that mixes using a static mixer, a device that mixes using a dynamic mixer with a single rotor, and a device equipped with two rod-shaped rotors. In addition to the above-mentioned dispensers, examples of two-component resin mixer / dispenser include tools, containers, devices, etc. attached to the dispensers.

[0086] The cleaning method for a two-component resin mixer / dispenser preferably includes a cleaning method for a mixing section and a nozzle section in which uncured resin remains, among the two-component curing type dispensing devices. In this case, cleaning of the two-component resin mixer / dispenser is carried out after one to several shots of resin are dispensed and before the next resin is dispensed, after molding using the dispenser is completed, when the color of the resin is changed, etc., and after dispensing of the resin is stopped.

[0087] The cleaning method for a two-component resin mixer / dispenser is characterized by using the above-mentioned solvent composition as a cleaning agent. The two-component resin mixer / dispenser usually has a tank, piping, and a mixing nozzle. The cleaning method for a two-component resin mixer / dispenser preferably includes the following steps 1 to 4. Step 1: Supplying a cleaning agent into a two-component resin mixer / dispenser; Step 2: cleaning the inside of the tank, piping, and / or mixing nozzle using the cleaning agent supplied in Step 1; Step 3: Discharging the cleaning agent; and Step 4: Optionally, drying the inside of the tank, piping and / or mixing nozzle by air blowing, spraying with a dredging shot and / or using a rinse agent.

[0088] Step 1 is a step of supplying a cleaning agent into a two-component resin mixer / dispenser. A specific method for supplying the cleaning agent can be appropriately selected depending on the shape of the two-component resin mixer / dispenser.

[0089] Step 2 is a step of cleaning the inside of the tank, piping, and / or mixing nozzle using the cleaning agent supplied in Step 1. Specific cleaning methods include wiping, immersion, stirring, brushing, spraying, ultrasonic cleaning, pressurized flow, backwashing, and combinations thereof, and can be appropriately selected depending on the shape of the two-component resin mixer / dispenser, etc. The temperature in the cleaning method is as described above.

[0090] Step 3 is a step of discharging the cleaning agent. For example, a solvent composition is supplied to the dispenser, and the uncured resin remaining in the mixing section and nozzle section can be removed by passing the solvent composition through a path through which the resin components are supplied and then discharging the solvent composition. This results in a cleaned dispenser.

[0091] Step 4 is a step of optionally drying the inside of the tank, piping, and / or mixing nozzle by air blowing, a dredging shot, and / or rinsing with a rinse agent. The drying conditions are as described above. The specific drying conditions are as described above. [Example]

[0092] 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 mass.

[0093] The components used in the examples are as follows: The cleaning agents (solvent compositions) in the examples and comparative examples were prepared by using the following solvents as they were or by mixing the solvents according to the compositions (parts by mass) in the table.

[0094] 1. Ingredients used (1) Component (A) AMOLEA® AS-300 (a mixture of more than 99% by mass of (E)-1-chloro-2,3,3-trifluoropropene and (Z)-1-chloro-2,3,3-trifluoropropene and less than 1% by mass of a stabilizer): manufactured by AGC Corporation (2) Component (B) Propylene glycol monomethyl ether (MP, 1-methoxy-2-propanol): manufactured by Tokyo Chemical Industry Co., Ltd. Propylene glycol monopropyl ether (PNP, 1-propoxy-2-propanol): manufactured by Tokyo Chemical Industry Co., Ltd. (3) Component (C) (C-1) trans-1,2-dichloroethylene: manufactured by Tokyo Chemical Industry Co., Ltd. (C-2) Esters (C-2-1) Dimethyl carbonate: manufactured by Tokyo Chemical Industry Co., Ltd. (C-2-2) γ-butyrolactone: manufactured by Tokyo Chemical Industry Co., Ltd. (C-2-3) ε-caprolactone: manufactured by Tokyo Chemical Industry Co., Ltd. (C-3) Other solvents (C-3-1) Dipropylene glycol monomethyl ether: manufactured by Tokyo Chemical Industry Co., Ltd. (C-3-2) Isooctane: manufactured by Tokyo Chemical Industry Co., Ltd. (C-3-3) 1-propanol: Fujifilm Wako Pure Chemical Industries, Ltd. (4)1233zd (4-1) 1233zd: Central Glass Co., Ltd.: HCFO-1233zd(Z): cis-1-chloro-3,3,3-trifluoropropene

[0095] 4. Test Example Test Examples 1 to 5 were carried out.

[0096] Test Example 1: Polyol solubility test (1)Resin used The polyols used in Test Example 1 are as follows. Ethylene glycol (Tokyo Chemical Industry Co., Ltd.) Diethylene glycol (Tokyo Chemical Industry Co., Ltd.) Propylene glycol (Tokyo Chemical Industry Co., Ltd.) Tetraethylene glycol (Tokyo Chemical Industry Co., Ltd.) Polypropylene glycol, triol type, average molecular weight 4,000 (Fujifilm Wako Pure Chemical Industries, Ltd.) Polytetramethylene oxide 2,000 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) Note that polytetramethylene oxide is a solid at room temperature, so it was melted in a constant temperature bath at 50°C before use. Castor oil (Fujifilm Wako Pure Chemical Industries, Ltd.)

[0097] (2) Solubility test 0.3 g of the polyol to be tested and 3 g of the solvent composition were weighed into a test tube. After shaking at 25°C for 10 seconds, the mixture was allowed to stand for 10 minutes and observed to confirm the state of the liquid. The solubility of the polyol was evaluated according to the following criteria. When the result of Test Example 1 was "Good" or "Excellent", it was determined that the solubility of the polyol was "excellent." ◎: No cloudiness, no phase separation ○: Cloudy, no phase separation ×: Cloudy, obvious phase separation ××: No cloudiness, clear phase separation

[0098] Test Example 2: Polyisocyanate solubility test 2-1: Uncured polyisocyanate dissolution test 0.3 g of the polyisocyanate to be tested (CSI-20 (manufactured by DAEJIN PHYSICS & CHEMICAL CO., LTD.)) and 3 g of the solvent composition were weighed into a test tube. After shaking for 10 seconds, the mixture was left to stand for 10 minutes and then observed to confirm the state of the liquid. The solubility of the polyisocyanate was evaluated according to the following criteria. When the result of Test Example 2-1 was "Good" or "Excellent", it was determined that the solubility of the polyisocyanate was "excellent."

[0099] ◎: No cloudiness, no phase separation ○: Cloudy, no phase separation ×: Cloudy, obvious phase separation XX: No cloudiness, clear phase separation or formation of a cured product

[0100] 2-2: Semi-cured polyisocyanate dissolution test 0.3 g of the polyisocyanate to be tested (CSI-20 (manufactured by DAEJIN PHYSICS & CHEMICAL CO., LTD.)) was weighed into a test tube and left to stand for 3 hours at 25°C and 70% humidity. 3 g of a solvent composition was weighed into the semi-cured polyisocyanate product that had been left to stand for 3 hours, and the mixture was shaken for 10 seconds and then left to stand for 10 minutes. After 10 minutes had passed, the state of the liquid was confirmed. The solubility of the semi-cured polyisocyanate product was evaluated according to the following criteria. If the result of Test Example 2-2 was "Good" or "Excellent", it was determined that "the solubility of the semi-cured polyisocyanate product was excellent."

[0101] ◎: The solid matter was completely dissolved ○: The solid matter dissolved and softened ×: Only the surface of the solid was dissolved XX: Not dissolved at all or remained as a hardened product

[0102] Test example 3: One-component urethane resin solubility test 4 g of a one-component urethane resin (LOCTITE Green Foam 340 g DGF-300: manufactured by Henkel Japan) was placed in a 200 ml PET cup and left for 1 minute to obtain a semi-cured urethane resin. 20 ml of a solvent composition was added thereto, and the degree of dissolution of the semi-cured urethane resin was confirmed. The state was also checked again after 1 hour. When the result of Test Example 3 was "Good" or "Excellent", it was judged that "the urethane resin had excellent solubility."

[0103] ◎: Transparent and colored, no solid residue ○: Cloudy, no solid residue ×: Partially dissolved, solid residue present (including partial gelation and surface film formation) xx: Not dissolved or completely gelled

[0104] Test Example 4: Epoxy resin solubility test 0.3 g of the epoxy resin to be tested (ADEKA RESIN EP-4520S (manufactured by ADEKA CORPORATION)) and 3 g of the solvent composition were weighed into a test tube. After shaking for 10 seconds, the mixture was left to stand for 10 minutes and observed to confirm the state of the liquid. The solubility of the epoxy resin was evaluated according to the following criteria. When the result of Test Example 4 was "Good" or "Excellent", it was judged that the solubility of the epoxy resin was "excellent."

[0105] ◎: No cloudiness, no phase separation ○: Cloudy, no phase separation ×: Cloudy, obvious phase separation ××: No cloudiness, clear phase separation

[0106] Test Example 5: Drying Test 0.1 g of the solvent composition was dropped onto a stainless steel plate (TS50-100-06 manufactured by Iwata Seisakusho, material: SUS304, 50 mm x 100 mm x 0.5 mm), and the time until it dried naturally was measured. Next, 1 ml of the solvent composition was impregnated into a piece of tissue paper folded in four, and the SUS plate was wiped with the solvent composition until the entire SUS plate was wet with the solvent composition, and the time until it dried naturally was measured. If the result of Test Example 5 was "●, ◯, or ◎", it was determined to have "excellent drying properties."

[0107] ◎: The dropped liquid dried naturally within 1 minute ○: After wiping, it dried naturally within 1 minute ●: After wiping, let it dry naturally within 3 minutes. ×: After wiping, the product dried naturally within 10 minutes ××: Did not dry naturally within 10 minutes after wiping

[0108] Test example 6: Pipe cleaning test An aquarium air tube (manufactured by LO Corporation, made of vinyl chloride, inner diameter 4 mm) was cut to a length of 10 cm, and 3 g of urethane resin (UR-320A, manufactured by Kobayashi Corporation) was poured into it. After leaving it for about 5 seconds until the entire air tube was dyed black, 30 g of the solvent composition was slowly poured into it, and the degree of cleaning was confirmed. ○: The air tube was cleaned until it became transparent. ×: Only spotty cleaning was possible ××: Could not be cleaned at all

[0109] The results are summarized in the following Tables 1 to 5. In the tables, "-" indicates that the test was not performed.

[0110] [Table 1]

[0111] [Table 2]

[0112] [Table 3]

[0113] [Table 4]

[0114] [Table 5]

[0115] Tables 1 to 5 reveal the following: The solvent compositions of the examples were excellent in dissolving various resins (polyols, polyisocyanates, urethane resins, and epoxy resins). In addition, the solvent compositions of the examples were excellent in drying properties.

[0116] Test Examples 1 to 3 show that the solvent compositions of the Examples have excellent solubility for polyol and polyisocyanate, which are the main components of urethane resin, and can dissolve one-component urethane resin. Additionally, Test Example 6 shows that the solvent compositions of the Examples were able to clean urethane resin adhering to the inside of a tube. Therefore, it can be said that the solvent compositions of the Examples can dissolve each component of the urethane resin when it is a two-component resin. Furthermore, when the urethane resin is used in a two-component resin mixer / dispenser, it can be said that the solvent compositions of the Examples can clean the tank, nozzle, and / or piping of the two-component resin mixer / dispenser.

[0117] A comparison of Examples 1 to 7 showed that drying properties were superior when the content of component (A) was 30 parts by mass or more relative to 100 parts by mass of the total of components (A) and (B). Furthermore, the solubility of various resins was superior when the content of component (A) was 90 parts by mass or less relative to 100 parts by mass of the total of components (A) and (B). The same can be said for a comparison of Examples 8 to 14.

[0118] According to Examples 15 and 16, even when the component (C) was contained, the drying properties were excellent.

[0119] According to Examples 20 to 21, when an ester (excluding carbonate ester) was contained as component (C), the drying property was better when the total content of components (A) and (B) was 80 parts by mass or more per 100 parts by mass of the solvent composition.

[0120] The solvent compositions of Comparative Examples 1 to 18 were poor in at least one of resin solubility and drying property. In particular, Comparative Example 12 was poor in drying property because the boiling point of component (B) exceeded 180° C. Furthermore, Comparative Example 12 contained 1233zd in such an amount that it was the main component, which can be said to have a large environmental impact and poor safety.

Claims

1. (A) at least one selected from the group consisting of (E)-1-chloro-2,3,3-trifluoropropene and (Z)-1-chloro-2,3,3-trifluoropropene; (B) containing monohydric glycol ethers having a boiling point of 180°C or less, 1233zd(Z)(HCFO-1233zd(CF) ３ -CH=CHCl) (Z-isomer ((Z)-1-chloro-3,3,3-trifluoropropene)) and 1223za (HCFO-1223za(CF ３ -CH=CCl ２ ) (1,1-dichloro-3,3,3-trifluoropropene)) in a total content of less than 30 mass%.

2. 2. The solvent composition according to claim 1, wherein component (B) is at least one selected from the group consisting of propylene glycol monomethyl ether, propylene glycol monopropyl ether, propylene glycol mono-n-butyl ether, ethylene glycol monoisobutyl ether, 3-methoxy-3-methyl-1-butanol, and ethylene glycol monoallyl ether.

3. The solvent composition according to claim 1, further comprising one or more additional components (C) selected from the group consisting of (C-1) trans-1,2-dichloroethylene and (C-2) esters.

4. 4. The solvent composition according to claim 3, wherein the component (C-2) is at least one selected from the group consisting of dimethyl carbonate, γ-butyrolactone, and ε-caprolactone.

5. The solvent composition according to any one of claims 1 to 4, for dissolving one or more components selected from the group consisting of polyols, polyisocyanates, uncured urethane resins, and uncured epoxy resins.

6. The solvent composition according to any one of claims 1 to 4, which is a cleaning agent for cleaning an object to be cleaned to which one or more selected from the group consisting of oily stains, oil, flux, polyol, polyisocyanate, and resin are attached.

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

8. A method for cleaning a two-component resin mixing and dispensing machine, characterized by using the solvent composition according to any one of claims 1 to 4 as a cleaning agent.

9. the two-component resin mixer / dispenser has a tank, a pipe, and a mixing nozzle; The method comprises the following steps 1 to 4: Step 1: Supplying a cleaning agent into a two-component resin mixer / dispenser; Step 2: cleaning the inside of the tank, the piping, and / or the mixing nozzle with the cleaning agent supplied in Step 1; Step 3: Discharging the cleaning agent; and Step 4: Optionally, drying the inside of the tank, piping, and / or mixing nozzle by air blowing, spraying, and / or rinsing with a rinse agent; The cleaning method of claim 8, comprising:

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