WO2008047844A1

WO2008047844A1 - Azeotropic solvent composition, pseudoazeotropic solvent composition, and mixed-solvent composition

Info

Publication number: WO2008047844A1
Application number: PCT/JP2007/070292
Authority: WO
Inventors: Michiomi Nagase; Tsuyoshi Hanada; Masaaki Tsuzaki; Kenroh Kitamura
Original assignee: Asahi Glass Company, Limited
Priority date: 2006-10-19
Filing date: 2007-10-17
Publication date: 2008-04-24
Also published as: JP2010001319A

Abstract

An azeotropic solvent composition which less influences the environment, has the sufficient ability to remove oils, dust, waxes, etc., less influences metals, plastics, elastomers, etc., and has excellent stability; a pseudoazeotropic solvent composition; and a mixed-solvent composition. The azeotropic solvent composition comprises 77.3 mass% 1,1,2,2-tetrafluoro-1-(2,2,2-trifluoroethoxy)ethane (HFE-347) and 22.7 mass% 1-bromopropane (1-PB). The pseudoazeotropic solvent composition comprises 72-84 mass% HFE-347 and 16-28 mass% 1-PB. The mixed-solvent composition comprises 60-90 mass% HFE-347 and 10-40 mass% 1-PB.

Description

Specification

Azeotropic solvent composition, pseudo-azeotropic solvent composition, and mixed solvent composition

Technical field

The present invention relates to an azeotropic solvent composition, a pseudo-azeotropic solvent composition, and a mixed solvent composition used for cleaning and the like.

Background art

[0002] Conventionally, in precision machinery industry, optical equipment industry, electrical and electronics industry, plastic processing industry, etc., fluorinated solvents are used for precise cleaning to remove oil, dust, wax, etc. adhering to manufacturing processing processes. Etc. are used. In particular, dichloropentafluoropropane (hereinafter referred to as R-225) and dichlorofluoroethane are non-flammable, excellent in chemical and thermal stability, and have a solubility in oils and fats. (Hereinafter referred to as R-1 41b), etc. are widely used.

Because HCFCs have an ozone depletion potential, it is decided that production will be completely abolished in 2020 in developed countries!

[0003] Therefore, as fluorine-based solvents that replace HCFCs, hydrofluoric carbons (hereinafter referred to as HFC) such as tridecafluorohexane and decafluoropentane, and perfluorocarbons (hereinafter referred to as PFC) such as perfluorohexane. )) Is used (see Patent Document 1). However, these fluorinated solvents also have a high global warming potential and are therefore regulated substances under the Kyoto Protocol for the purpose of preventing global warming. In addition, HFCs and PFCs were not sufficient in terms of performance as solvents to replace R-225 and R-141b, which have lower solubility in oils and fats than HCFCs.

[0004] In recent years, the development of a solvent to replace HFCs and PFCs has been promoted, and one of them is Hyde Mouth Fluoroether (hereinafter referred to as HFE). Specific examples of HFEs include (perfluorobutoxy) methane (CFOCH), (perfluorobutoxy)

4 9 3

Ethane (C F ○ C H), 1, 1, 2, 2-tetrafluorool 1— (2, 2, 2-trifnoreo

4 9 2 5

Xyl) ethane (CHF CF OCH CF). These HFEs are incombustible It has advantages such as excellent chemical and thermal stability, good drying property, zero ozone depletion coefficient and relatively small global warming effect. However, HFEs, like HFCs and PFCs, have been desired to have further improved dissolution performance that is not sufficient in the solubility of fats and oils.

On the other hand, 1 bromopropane is known as a solvent having a strong detergency against oils and fats. However, the use of 1 bromopropane alone is likely to affect plastics and elastomers. Furthermore, since the boiling point is as high as 71 ° C, there is a problem that plastics that are susceptible to heat are deformed.

[0005] Accordingly, various mixed solvents of 1 bromopropane and HFEs have been studied. In this case, a pseudo-azeotropic composition is searched for so that the composition change is small even after repeated evaporation and condensation. For example, (perfluorobutoxy) azeotrope-like composition of methane, 1-bromopropane and alcohol (ternary azeotrope-like composition) (see Patent Documents 2 and 3), An azeotrope-like composition of (butoxy) methane and 1-bromopropane (see Patent Document 4) has been proposed.

Patent Document 1: Japanese Patent Laid-Open No. 2001-262171

Patent Document 2: Japanese Unexamined Patent Publication No. 2000-143568

Patent Document 3: Japanese Translation of Special Publication 2002-503762

Patent Document 4: Japanese Patent Publication No. 11 505249

Disclosure of the invention

Problems to be solved by the invention

[0006] The azeotrope-like compositions described in Patent Documents 2 to 4 are not always sufficiently stable.

[0007] The present invention has a sufficient detergency for oil, dust, wax, etc., which have a small impact on the environment, and has an excellent azeotropic property with a small impact on metals, plastics, elastomers, etc. The object is to provide a solvent composition, a pseudoazeotropic solvent composition, and a mixed solvent composition.

Means for solving the problem

That is, the present invention has the following gist.

(1) 1, 1, 2, 2 Tetrafunole age 1 (2, 2, 2 Trifunole age ethoxy) ethane 77-3 mass% and 1 bromopropane 22.7 mass% Solvent composition. (2) 1, 1, 2, 2—Terafunore old low 1 (2, 2, 2—Rifunore old mouth) ethane 72-84% by mass, 1 bromopropane 16-28% by mass A pseudoazeotropic solvent composition containing

(3) 1, 1, 2, 2 Terafunore old low 1 (2, 2, 2 rifunore old mouth) ethane 60-90% by mass, 1 bromopropane 10-40% by mass, A mixed solvent composition.

(4) The mixed solvent composition according to (3), further containing a solvent.

(5) The solvent is at least one compound selected from the group consisting of hydrocarbons, alcohols, ketones, halogenated hydrocarbons, ethers, esters, and glycol ethers. The mixed solvent composition according to (4) above.

(6) The mixed solvent composition according to the above (5), wherein the alcohol is a linear or cyclic alcohol having a carbon number;! To 16, and the content is 10% by mass or less.

(7) The azeotropic solvent composition according to (1), further comprising at least one compound selected from the group consisting of nitro compounds, ammine compounds, phenols, and triazoles as a stabilizer. object.

(8) The pseudoazeotropic solvent according to (2) above, further comprising at least one compound selected from the group consisting of nitro compounds, ammine compounds, phenols, and triazoles as a stabilizer. Composition.

(9) The above-mentioned (3) to (6), further containing at least one compound selected from the group consisting of nitro compounds, ammine compounds, phenols, and triazoles as a stabilizer. The mixed solvent composition according to any one of the above.

(10) An article for cleaning oils and fats adhering to the article surface using the azeotropic solvent composition, pseudo-azeotropic solvent composition, or mixed solvent composition according to any one of (1) to (9) above Cleaning method

Yes

(11) The cleaning method according to (10), wherein the material of the article is glass, ceramics, metal, plastic, or elastomer.

The invention's effect

The azeotropic solvent composition, pseudo-azeotropic solvent composition and mixed solvent composition of the present invention have sufficient detergency against oil, dust, wax, etc., which have a small impact on the environment, and are made of metal, plastic, elastomer, and the like. It is a composition excellent in stability with little influence on the first grade. Brief Description of Drawings

[0010] FIG. 1 is a graph showing a gas-liquid equilibrium measurement result in Example 1.

BEST MODE FOR CARRYING OUT THE INVENTION

[0011] The azeotropic solvent composition and pseudo-azeotropic solvent composition of the present invention (hereinafter collectively referred to as the present solvent yarn composition) are 1, 1, 2, 2-tetrafunole 2, 2, 2-Trifunole-aged roethoxy) ethane (hereinafter referred to as HFE-347) and 1 bromopropane (hereinafter referred to as 1 BP).

The present inventors have found that HFE-347 and 1-BP exhibit an azeotropic composition. Furthermore, within the range where the quasi-azeotropic composition of HFE-347 and 1-BP, it is possible to achieve both a sufficient detergency for oils and fats and a non-influence on plastics. I found out.

[0012] As a result of investigations by the present inventors, it has been found that an azeotropic solvent composition is obtained when HFE-347 is 77.3% by mass and 1-BP is 22.7% by mass at 1 atm. Therefore, the azeotropic solvent composition of the present invention is a composition having HFE-347 of 77.3 mass% and 1 BP force of 2.7 mass%.

Also, in 1 atm, HFE- 347 is 72 to 84 wt%, 1-BP was found to be a near-azeotropic solvent composition in the range of 16 to 28 weight ^_0/0. Therefore, near-azeotropic solvent composition of the present invention, HFE- 347 forces 72-84 mass ^_0/0, 1-BP is a composition of 16-28 wt%. This solvent composition shows little or no change in composition even when evaporation and condensation are repeated. Therefore, there is an advantage that stable cleaning properties can be obtained even if steam cleaning is performed, and it is easy to collect and recycle the evaporated solvent composition.

In the present invention, the pseudoazeotropic solvent composition means a composition having a relative volatility of 0.83 to 1.20.

[0013] In addition, the boiling point of the azeotropic solvent composition of 1 BP of HFE- 347 and 22.7 weight ^_0/0 of 77.3 mass ^_0/0 in 0. LOMPa was found to be 53 ° C . Since this is 18 ° C lower than the boiling point of 1-BP alone, it is suitable for cleaning plastic parts, precision machine parts, optical parts, etc. that are easily affected by heat.

Furthermore, it was found that the present solvent composition has no flash point. Therefore, handling is easy Easy.

[0014] The present solvent composition is a composition containing HFE 347 and 1 BP.

An additive such as an optional stabilizer, which will be described later, may be included as long as it contains two components. However, the composition of HFE-347 and 1 BP specified in the present invention when additives are included is the composition when the total amount of HFE-347 and 1 BP in the solvent composition is 100% by mass. is there.

[0015] The mixed solvent composition of the present invention contains 60 to 90% by mass of HFE-347 and 10 to 40% by mass of 1-BP.

Further, the mixed solvent composition may contain other solvents depending on the purpose, such as adjusting solubility. Examples of the other solvent include at least one compound selected from the group consisting of hydrocarbons, alcohols, ketones, halogenated hydrocarbons, ethers, esters, and glycol ethers.

The content of the other solvent is preferably 20% by mass or less, more preferably 10% by mass or less, with respect to 100% by mass of the mixed solvent composition. In addition, when other solvents are added, an azeotropic composition or a pseudo-azeotropic composition is more preferable.

[0016] As the hydrocarbons, linear or cyclic saturated or unsaturated hydrocarbons having 5 to 15 carbon atoms are preferred. N-pentane, 2-methylbutane, n-hexane, 2-methylpentane, 2,2 dimethylbutane, 2,3 dimethylbutane, n-heptane, 2 methylhexane, 3-methylhexane, 2,4 dimethylpentane, n-octane, 2 methylheptane, 3-methylheptane, 4 methylheptane, 2 , 2 Dimethyl hexane, 2, 5 Dimethyl hexane, 3, 3 Dimethyl hexane, 2 Methyl-3 ethylpentane, 3 Methyl-3-ethynolepentane, 2, 3, 3 Trimethinorepentane, 2, 3, 4 Trimethinole Pentane, 2, 2, 3 trimethylpentane, 2 methylheptane, 2, 2, 4 trimethylpentane, n nonane, 2, 2, 5 trimethylhexane, n-decane, n dodecane, cyclopentane, Chirushikuro pentane, cyclohexane, hexane Mechinoreshikuro, hexane Echinoreshikuro, hexane, etc. bicyclo.

[0017] The alcohol is preferably a linear or cyclic alcohol having 1 to 16 carbon atoms, such as methanol, ethanol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol. Noreanolecanol, sec butyl alcohol, isobutyl alcohol, tert butyl alcohole, 1-pentinoreanoreconole, 2-pentinoreanoreconole, 1-ethenoleone 1-propenoreanoreconole, 2-methyl-1-butyl alcohol 3-methyl-1 butyl alcohol, 3 methyl-2-butyl alcohol, neopentyl alcohol, 1 hexyl alcohol, 2 methylolene 1 pentenorea noreconole, 4-methinoleol 2 pentinorea nole alcohole, 2-ethylol 1 butyl alcohol, 1-heptyl alcohol, 2-heptyl alcohol, 1-heptino-reanolol, 1-otatino-re-no, 2-o-t-ethyl alcohol, 2-ethyl 1-hexyl alcohol, 1-nonyl alcohol Nore, 3, 5, 5—Trimethinole —1 Hexinorenoreconole, 1-Dequinoleanoreconole, 1-Undecinoreanoreconole, 1-Dodecinoreanoreconole, Cyclohexenoreanoreconole, 1-Methinorecyclohexenoreanoreconole 2, 2-methylcyclohexyl alcohol, 3-methylcyclohexyl alcohol, 4-methylcyclohexyl alcohol, α-terpineol, 2,6-dimethyl-4-heptyl alcohol, tetradecyl alcohol and the like. These alcohols may be used alone or in combination of two or more.

When the mixed solvent composition contains an alcohol as the other solvent, the cleaning effect can be exhibited even for ionic stains.

[0018] As the ketones, chain or cyclic ketones having 3 to 9 carbon atoms are preferred. Specifically, acetone, methyl ethyl ketone, 2 pentanone, 3 pentanone, 2 hexanone, methinoreisobutyl Examples include ketone, 2 heptanone, 3 heptanone, 4 1-heptanone, diisobutyl ketone, cyclohexanone, methylcyclohexanone, and acetophenone.

[0019] As the rogenated hydrocarbons, methylene chloride, 1,1-dichloroethane, 1,2-dichloroethane, 1-saturated or unsaturated halogenated hydrocarbons having 1 to 6 carbon atoms are preferred. , 1, 2-trichloroethane, 1, 1, 1, 1, 2-tetrachloroethane, 1, 1, 2, 2-tetrachloroethane, pentachloroethane, 1,1-dichloroethylene, cis l, 2-dichloroethylene, tran s- 1, 2, 2-dichloroethylene, trichloroethylene, tetrachloroethylene, 1,2-dichloroprone, dichloropentafluoropropane, dichlorofluoroethane, decafluoroethylene, pentafluoro Lobutane, heptafluorocyclopentane and the like can be mentioned.

[0020] As the ethers, linear or cyclic ethers having 2 to 8 carbon atoms are preferred. Chinoleatenore, dipropinoleatenore, diisopropinoleatenore, dibutinoleethenore, ethinorevinino ethenore, butinorevininoreethenore, anisonore, phenetenore, methinorea nisol, dioxane, furan methyl , Tetrahydrofuran, (perfluorobutoxy) methane, (perfluorobutoxy) ethane and the like.

[0021] As the esters, a chain or cyclic ester having 2 to 19 carbon atoms is preferable. Specifically, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, Sec-Butyl acetate, Pentyl acetate, Methoxybutyl acetate, sec-Hexyl acetate, 2-Ethylbutyl acetate, 2-Ethylhexyl acetate, Cyclohexyl acetate, Benzyl acetate, Methyl propionate, Ethyl propionate, Butyl propionate, Examples include 2-hydroxy-2-methylpropionate, ethyl phthalate, and dibutyl phthalate.

[0022] Examples of glycol ethers include dallic ethers in which one or both of the hydroxyl groups of a dihydric alcohol dimer having 2 to 4 carbon atoms is substituted with an alkyl group having 1 to 6 carbon atoms. Specific examples of preferred groups include ethylene glycol monomethyl ether, ethylene glycol monoethanolinoate, ethylene glycol monoisopropinoreate, ethylene glycol monobutinoleate, ethylene glycol monohexenoreate , Ethylene Glycol No Resin Methyl Noe Ethenore, Ethylene Glycol Nole Jetino Rete Tenole, Ethylene Glycol Dibutyl Ether, Ethylene Glycol Monomethoxy Methyl Ether, Diethylene Glycol Monomethyl Ether, Diethylene Glycol Monoethyl Ether, Diethyl Glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol noretino methino reenotere, diethylene glycol gnore chinenoate nore, diethylene glycol monoresibutino oleate nore, propylene glycol nore mono methinoreate nore, propylene glycol nore monoe Chinoleatenore, propyleneglycolmonobutinoreate tenole, dipropyleneglycololemonomethinoleatenore, dipropyleneglycololemonomethinore ethenore, dipropyleneglycolenomonopropinoreatenore, dipropyleneglycolenoremonobutyl ether Etc.

[0023] The present solvent composition and mixed solvent composition may contain an optional stabilizer. The content of the stabilizer is 0.0% with respect to 100% by mass of the present solvent composition or mixed solvent composition. 0;! To 5% by mass is preferable 0.0;! To 1% by mass is more preferable. If the content of the stabilizer is within the above range, the stability of the present solvent composition and the mixed solvent composition can be further enhanced.

Stabilizers include, for example, nitro compounds such as nitromethane, nitroethane, nitropropane, and nitrobenzene: amines such as cetylamine, triethylamine, i-propylamine, and n-butylamine: phenenole, o crezo monole, m crezo Monore, p-cresol, zimole, p-t butylphenol, t-butylcatechol, catechol, isoeugenol, o methoxyphenol, bisphenol A, isoamyl salicylate, benzyl salicylate, methyl salicylate, 2, 6 tert-butyl-p taresol, etc. Phenols of: 2- (2, -hydroxy-5, monomethylphenol) benzotriazole, 2- (2, hydroxy-3'-t-butyl-5'-methylphenyl) -5 clobenzotriazole, 1, 2, 3— Benzotriazole, 1-[( N, N bis-1-ethylhexyl) aminomethinore] benzotriazole and the like. These stabilizers may be used alone or in combination of two or more.

[0024] The present solvent composition and mixed solvent composition can be suitably used as a cleaning agent for removing dirt adhering to an article in the same manner as conventional HCFCs such as R-225 and R-141b. .

Examples of the material of the article include glass, ceramics, plastic, elastomer, metal, and the like. Specific examples of articles include electronic and electrical equipment, precision machinery / equipment, optical equipment, etc., and IC, micromotors, relays, bearings, optical lenses, printed circuit boards, glass substrates, etc., which are their components. It is done.

[0025] The dirt that adheres to an article includes a substance that is used when manufacturing an article or a part that constitutes the article and must be finally removed, or dirt that adheres to an article when used. Substances that form dirt include greases, mineral oils, waxes, oils and fats such as oil-based inks, fluxes, and dust.

Examples of means for removing such dirt include hand wiping, dipping, spraying, shaking, ultrasonic cleaning, steam cleaning, and the like. A method combining these means can also be adopted. [0026] The present solvent composition and mixed solvent composition exhibit excellent cleaning performance for oils and fats.

In addition, since this solvent composition has no or little change in composition even when it is recycled by steam cleaning, distillation, etc., it can be used as it is for a cleaning apparatus that has conventionally used a solvent composed mainly of one component. Does not require major changes in cleaning equipment.

In addition, since the present solvent composition and mixed solvent composition have a relatively small influence on metals, plastics, elastomers, etc., they are less likely to adversely affect composite parts made of these. Furthermore, the present solvent composition and mixed solvent composition do not have a flash point and are easy to handle.

[0027] In addition, the present solvent composition and mixed solvent composition have high solubility in oils and fats, etc., so that they are not limited to cleaning agents for removing stains, but coating solvents and extracting agents for various compounds. Use with power S, etc.

Example

[0028] Examples of the present invention will be specifically described below, but the present invention should not be construed as being limited thereto.

Examples 1-4, Example 6-8, Example 12-; 13, Example 17-; 19 and Example 21 are Examples, Example 5, Examples 9-; 11, Examples 14-; 16, Examples 20 and 22 Is a comparative example.

[0029] The measurement conditions of the gas chromatograph in the present invention are as follows.

Model: Hewlett Packard G1503A type

Column: DB—1301 (length 60m, diameter 0.25mm)

Column temperature: 60 ° C

Mobile phase gas: He 3mL / min, H 30mL / min, Air 400mL / min

2

The measurement conditions of the ion chromatograph in the present invention are as follows.

Model: DIONEX, DX-100 type

Separation column: ionpac AS 12A (length 200mm, diameter 4mm)

Guard column: ionpac AG—12A (length 50mm, H4mm φ)

Suppressor: ASRS ULTRA II (diameter 4mm φ)

Column temperature: 20-25 ° C Eluent: 2.7 mmol / L sodium carbonate, 0.3 mmol / L sodium bicarbonate mixed water solution lmLZmin

[0030] <Example 1: Vapor-liquid equilibrium measurement>

300 g of each solvent composition in which HFE-347 and 1-BP were mixed at various mass ratios was placed in a sample container of an ozone-type vapor-liquid equilibrium measuring apparatus and refluxed at atmospheric pressure. Adjust the heating so that the dripping rate of the vapor phase condensate is appropriate, maintain stable boiling for 2 hours, and confirm that the pressure and boiling point are stable. A sample was taken and the composition of HFE-347 and 1 BP was analyzed by gas chromatography. The composition of liquid and gas phase HFE-347 is shown in Table 1 and Figure 1, and the relative volatility and boiling point are shown in Table 1.

[0031] [Table 1]

[0032] From Table 1 and Figure 1, HFE—347 force S77. 3 mass. The solvent composition having a / ₀ , 1 BP force of 2.7% by mass was an azeotropic solvent composition in which the compositions of the gas phase and the liquid phase coincided. The boiling point (azeotropic point) was 53 ° C.

Furthermore, the solvent composition of HFE—347 force 7-84.5 mass% has a relative volatility of 0 · 83-1. 20 pseudoazeotropic solvent compositions. The boiling point was 53 to 54 ° C.

[0033] <Examples 2 to 4: Flash point measurement>

With respect to this solvent composition in which HFE-347 and 11 BP were mixed at a mass ratio shown in Table 2, the presence or absence of a flash point was examined using a tag-enclosed flash point measuring device. The results are shown in Table 2.

[0034] [Table 2]

[0035] From Table 2, it became clear that the present solvent compositions of the Examples did not have a flash point.

A metal processing oil cleaning test was conducted using each solvent composition of the composition shown in Table 3 consisting of HFE-347 and 1 PB.

A SUS 304 test piece (25 mm x 30 mm x 2 mm) was dipped in metal working oil (Nippon Grease, temper oil) to attach the metal working oil. After the test piece was taken out from the metal processing oil, it was immersed in each solvent composition kept at 40 ° C. for 5 minutes and washed with ultrasonic waves for 5 minutes. The degree of removal of metalworking oil was visually evaluated. The results are shown in Table 3.

In Table 3, ○ indicates that it was successfully removed, Δ indicates that a trace amount remained, and X indicates that it remained substantially.

[0037] [Table Example HFE-3 4 7 (mass%) 1-BP (mass%) Evaluation

5 5 0 5 0 O

6 7 2 2 8 ○

7 7 7. 3 2 2 .7 o

8 8 4 1 6 o

9 9 5 5 厶

1 0 1 0 0 0 厶

[0038] From Table 3, when the solvent composition was the present solvent composition (Examples 6 to 8), the metalworking oil was successfully removed.

On the other hand, when the content of 1 PB in the solvent composition was small (Examples 9 and 10), a trace amount of metalworking oil remained.

[0039] <Example 11-; 14: Cleaning test with 3 tank type cleaning machine>

Each solvent composition consisting of HFE-347 and 1-PB with the composition shown in Table 4 was put into a three-tank washing machine, and the solvent in the water separation tank after operating for 8 hours was measured with a gas chromatograph. Table 4 shows the measurement results (composition of HFE-347).

[0040] [Table 4]

[0041] From Table 4, when the solvent composition is a pseudo-azeotropic solvent composition (Examples 12 and 13), the composition of the initial HFE-347 and the composition of HFE-347 in the water separator after 8 hours The difference was ± 0.5% by mass or less, and there was almost no change in composition.

On the other hand, when the solvent composition was not the present solvent composition (Examples 11 and 14), the difference in composition of HFE-347 was ± 1.0% by mass or more, and the composition in the solvent composition changed greatly. [0042] <Examples 15 to 20: Confirmation test of effects on plastic>

In each solvent composition consisting of HFE-347 and 1-PB with the composition shown in Table 5, a plastic test piece (25mm x 30mm x 2mm) made of each material is placed at room temperature (25.5.C) for 5 minutes. Immersion was performed and the influence on the test piece was evaluated. The results are shown in Table 5.

In Table 5, ○ indicates almost no change, Δ indicates a slight change, and X indicates a large change such as cracking, whitening, or dissolution.

[0043] [Table 5]

[0044] From Table 5, when the solvent composition was the present solvent composition (Examples 17 to 19), the effect on the plastic made of each material was small.

On the other hand, when the content of 1 PB in the solvent composition was high (Examples 15 and 16), the effect on the plastic made of each material was significant.

[0045] <Examples 21 and 22: stability test>

(Example 21)

77. An accelerated oxidization test according to JIS K-1508 was conducted by adding 5 g of activated carbon to 200 ml of an azeotropic solvent composition composed of 3% by mass of HFE-347 and 22.7% by mass of 1-BP. The oxygen solution was irradiated with light while passing through oxygen bubbles saturated with water in the presence of mild steel pieces in the azeotropic solvent composition, and heated and refluxed for 72 hours with the generated heat.

The fluorine ion concentration in the azeotropic solvent composition before and after the test was measured with an ion chromatograph, and the fluorine ion concentration was below the detection limit (0.1 ppm) both before and after the test. (Example 22)

An oxidation acceleration test was conducted in the same manner as in Example 21 except that a solvent composition comprising 78% by mass of (perfluorobutoxy) methane and 22% by mass of 1-BP was used as the solvent composition. .

When the fluorine ion concentration in the solvent composition before and after the test was measured by ion chromatography, the fluorine ion concentration before the test was below the detection limit (0.Ippm), and the fluorine ion concentration after the test was 3ppm. there were.

Industrial applicability

The composition of the present invention can be applied to the removal of dirt such as fats and oils attached to articles such as electronic parts such as ICs, precision machine parts, and glass substrates. It should be noted that the entire contents of the specification, claims, drawings and abstract of the Japanese Patent Application No. 2006-284969 filed on October 19th, 2006 are hereby incorporated herein by reference. As it is incorporated.

Claims

The scope of the claims

[I] 1, 1, 2, 2 Tetrafunole low 1 1 (2, 2, 2 Trifunole ethoxy) ethane 77.3 mass% and 1 bromopropane 22.7 mass% azeotropic solvent Composition.

[2] 1, 1, 2, 2 Tetrafunole age 1 (2, 2, 2 Trifnoreth ethoxy) ethane 72-84% by mass and 1 bromopropane 16-28% by mass Boiling solvent composition.

[3] 1, 1, 2, 2 Tetrafunole age 1 (2, 2, 2 Trifunole age ethoxy) ethane 60-90 mass% and 1 bromopropane 10-40 mass% mixed solvent containing Composition.

[4] The mixed solvent composition according to claim 3, further comprising a solvent.

[5] The solvent is at least one compound selected from the group consisting of hydrocarbons, alcohols, ketones, halogenated hydrocarbons, ethers, esters, and glycol ethers. 4. The mixed solvent composition according to 4.

[6] The mixed solvent composition according to claim 5, wherein the alcohol power is a linear or cyclic alcohol having 1 to 16 carbon atoms, and has a strength and a content of 10% by mass or less.

[7] The azeotropic solvent composition according to claim 1, further comprising at least one compound selected from the group consisting of nitro compounds, amine compounds, phenols, and triazoles as a stabilizer. object.

[8] The pseudoazeotropic solvent according to claim 2, further comprising at least one compound selected from the group consisting of nitro compounds, amine compounds, phenols, and triazoles as a stabilizer. Composition.

[9] Furthermore, as a stabilizer, at least one compound selected from the group consisting of nitro compounds, amine compounds, phenols, and triazoles may be used. A mixed solvent composition as described in 1. above.

[10] Claims !! to 9 of! / 9, and using the azeotropic solvent composition, pseudo-azeotropic solvent composition, or mixed solvent composition according to any one of the above, to wash fats and oils adhering to the surface of the article A method for cleaning an article.

[I I] The cleaning method according to claim 10, wherein the material of the article is glass, ceramics, metal, plastic, or elastomer.