JPH0641588A - Composition of mixed solvent - Google Patents

Abstract

PURPOSE:To provide a substitute cleaning solvent composition without affecting the ozonosphere while maintaining excellent characteristics possessed by conventional trichlorotrifluoroethane. CONSTITUTION:The composition of a mixed solvent is composed of a chain fluorinated hydrocarbon in which part or all of hydrogen atoms in a 4C or higher chain hydrocarbon are replaced with fluorine atoms and chlorofluorinated hydrocarbons.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed solvent composition, and more particularly to a mixed solvent composition suitable for removing fluxes, fats and oils, dust, etc. adhering to ICs, electronic parts, precision machine parts and the like. It relates to a composition.

[0002]

2. Description of the Related Art Conventionally, in the manufacture of ICs, electronic parts and precision machine parts, cleaning with an organic solvent has been carried out in order to remove flux, grease, dust, etc. adhering to the parts during assembly. For such cleaning, 1,1,2-trichloro-1,2,2-trifluoroethane (hereinafter referred to as R113) has been widely used as an organic solvent. R113 is nonflammable, has little toxicity, and is excellent in stability. Further, R113 has an excellent characteristic that it selectively dissolves only various stains without damaging the base material such as metal, plastic, and elastomer. Therefore, various precision parts or various electronic parts made of metal, plastic, elastomer, etc. Moreover, it was most suitable for cleaning the printed circuit boards on which these electronic components were mounted.

[0003]

[Problems to be Solved by the Invention]
Although 113 has various advantages, it has a long chemical life in the troposphere and diffuses into the stratosphere where it is decomposed by ultraviolet rays to generate chlorine radicals. Chlorine radicals cause a chain reaction with stratospheric ozone, which destroys the ozone layer.

Therefore, in place of the conventional R113, an alternative cleaning solvent that is less likely to destroy the ozone layer is being actively searched. As the alternative cleaning solvent, 2,2-dichloro-1,1,1-trifluoroethane, 1,1-dichloro-1-fluoroethane, 3,3-dichloro-1,
1,1,2,2-pentafluoropropane, 1,3-dichloro-1,1,2,2,3-pentafluoropropane and the like have been developed.

These alternative cleaning solvents have the same excellent cleaning properties as R113, and have a very small effect on the ozone layer. However, since these alternative cleaning solvents contain chlorine atoms, they slightly affect the ozone layer, albeit only slightly. Therefore, it is desired to develop a more excellent alternative cleaning solvent that does not affect the ozone layer at all.

The present invention uses, as an active ingredient, a chain fluorinated hydrocarbon that does not affect the ozone layer at all because it does not contain chlorine atoms, and is an alternative that satisfies the excellent characteristics of conventional R113. It is an object of the present invention to provide a novel mixed solvent composition that can be used as a cleaning solvent.

[0007]

The present invention has been made to achieve the above-mentioned object. Firstly, a part or all of hydrogen atoms of a chain hydrocarbon having 4 or more carbon atoms is fluorine. It is intended to provide a composition of a mixed solvent comprising a chain fluorinated hydrocarbon (A) substituted with atoms and a chlorinated fluorinated hydrocarbon (B).

In the present invention, it is important to use the above chain fluorinated hydrocarbon (A) and chlorinated fluorinated hydrocarbon (B). Conventionally, such a mixed solvent composition has a flux or It has never been used as a cleaning agent for removing oils and fats.

The chain fluorinated hydrocarbon (A) is characterized in that it does not contain chlorine atoms and therefore does not affect the ozone layer at all. Further, the composition of the mixed solvent comprising the chain fluorinated hydrocarbon (A) and the chlorinated fluorinated hydrocarbon (B) has high selective solubility in oil and the like,
Suitable as a cleaning solvent.

Secondly, the present invention comprises a chain fluorinated hydrocarbon (A), a chlorinated fluorinated hydrocarbon (B), and a solvent soluble in the chain fluorinated hydrocarbon (A) ( The present invention provides a mixed solvent composition comprising C).

The chlorinated fluorinated hydrocarbons (B) used in the present invention include 2,2-dichloro-1,1,1-
Trifluoroethane, 1,1-dichloro-1-fluoroethane, 3,3-dichloro-1,1,1,2,2-pentafluoropropane, or 1,3-dichloro-1,
1,2,2,3-pentafluoropropane and the like can be mentioned. These chlorinated fluorinated hydrocarbons (B) can be used alone or in combination of two or more.

The composition of the present invention comprises the above chain fluorinated hydrocarbon (A) and chlorinated fluorinated hydrocarbons (B), which is soluble in the above chain fluorinated hydrocarbon (A). C5 or more alkanes (c-
1), cycloalkanes having 5 or more carbon atoms (c-2), alcohols (c-3), ketones (c-4), ethers (c-5), esters (c-6), and At least 1 selected from the group of halogenated hydrocarbons (c-7)
A seed can be blended and used.

The above chain fluorinated hydrocarbon (A) (hereinafter,
As the specific FC), those containing at least one hydrogen atom are preferably used because they have a high decomposition rate in the atmosphere and a short life and therefore do not contribute to global warming. Further, the specific FC in which the number of hydrogen atoms does not exceed the number of fluorine atoms is flame-retardant and is preferably used. Further, the specific FC has a carbon number of 4 or more, preferably about 4 to 8 is selected, and a carbon number of about 10 has a boiling point suitable for cleaning purposes and solvent recovery, and is preferably used. .

The specific FC can be variously exemplified in a wide range, but for example, 1,1,1,3,3,4,4
-Heptafluorobutane, 1,1,1,2,4,4,4
-Heptafluorobutane, 1,1,1,4,4,4-hexafluorobutane, 1,1,1,2,4,4,4-heptafluoro-2- (trifluoromethyl) butane,
1,1,2,2,3,3,4,4-octafluoropentane, 1,1,1,2,2,5,5,6,6,6-decafluorohexane, 1,1,1, 3, 3, 4, 4, 6,
6,6-decafluorohexane, 1,1,1,2,2
3,3,4,4-nonafluorohexane, 1,1,2,
2,3,3,4,4,5,5,6,6-dodecafluoroheptane, 1,1,1,2,2,3,3,4,5,5
5,6,6-tridecafluorooctane, or 1,
1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
Preferred examples include 7,7,8,8-heptadecafluorodecane and the like. These specific FCs may be used alone or in combination of two or more.

Alkanes having 5 or more carbon atoms (c-1) and cycloalkanes having 5 or more carbon atoms (c-2) as the solvent (C) soluble in the specific FC include pentane, 2-
Methylbutane, 2,2-dimethylpropane, hexane,
2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane, heptane, 2
-Methylhexane, 3-methylhexane, 2,3-dimethylpentane, 2,4-dimethylpentane, octane,
Examples thereof include 2,2,3-trimethylpentane, 2,2,4-trimethylpentane, cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, and ethylcyclohexane, but are not limited thereto.

As the alcohol (c-3) as the solvent (C) soluble in the specific FC, methanol, ethanol, i-propanol, n-propanol, n-butanol, i-butanol, s-butanol, or Examples thereof include t-butanol and the like, but the invention is not limited thereto.

Examples of the ketones (c-4) as the solvent (C) soluble in the specific FC include, but are not limited to, acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone. is not.

As the ethers (c-5) as the solvent (C) soluble in the specific FC, diethyl ether, methyl cellosolve, tetrahydrofuran, methyl-t-butyl ether, 1,4-dioxane and the like can be mentioned. However, it is not limited to this.

The esters (c-6) as the solvent (C) soluble in the specific FC include methyl formate, ethyl formate,
Examples thereof include propyl formate, methyl acetate, ethyl acetate, methyl propionate, and ethyl propionate, but are not limited thereto.

As the halogenated hydrocarbons (c-7) as the solvent (C) soluble in the specific FC, as the chlorinated fluorinated hydrocarbons (B), dichloromethane, c
is-1,2-dichloroethylene, trans-1,2
-Dichloroethylene, 1,1,1-trichloroethane,
1,1,2-trichloroethane, trichloroethylene,
Alternatively, tetrachloroethylene and the like can be mentioned, but the invention is not limited thereto.

The solvent (C) may be used alone or in combination of two or more.

The mixed composition ratio of the composition of the present invention is not particularly limited, but from the viewpoint of not affecting the ozone layer, the specific FC is preferably used in a content of 50% by weight or more. The preferred content of the chlorinated fluorinated hydrocarbons (B) is about 0.1% by weight to 50% by weight, and the preferred content of the solvent (C) is about 0.1% by weight to 50% by weight. Is.

A nonionic surfactant may be added to the mixed solvent composition of the present invention. The nonionic surfactant is not particularly limited, but preferably, for example, alkyl polyoxyethylene ether, alkylallyl polyoxyethylene ether, alkylallyl formaldehyde condensed polyoxyethylene ether, glycerin ether and its poly Block polymers containing oxyethylene ether and polyoxypropylene as lipophilic groups, ether type such as alkylthiopolyoxyethylene ether, polyoxyethylene ether of propylene glycol ester, polyoxyethylene ether of glycerin ester, polyoxyethylene ether of sorbitan ester Such as ether ester type, polyoxyethylene fatty acid ester, glycerin ester, sorbitan ester, etc., or fatty acid alkano Ruamido, may be mentioned nitrogen-containing type such as polyoxyethylene fatty acid amides.

The mixed solvent composition of the present invention may contain hydrofluorocarbons other than the specific FC which do not destroy the ozone layer. Such hydrofluorocarbons include 1,2-difluoroethane, 1,
1,1,2,3-pentafluoropropane, 1,1,
2,2,3-pentafluoropropane, 1,1,1,3
-Tetrafluoropropane, 1,3-difluoropropane and the like can be mentioned, but the invention is not limited thereto.

Further, the mixed solvent composition of the present invention may contain components that have been appropriately added to this type of cleaning solvent composition in accordance with its use. Examples of such components are auxiliaries and stabilizers for cleaning solvent compositions.

Examples of the above components include nitro compounds such as nitromethane, nitroethane, nitropropane and nitrobenzene, amines such as diethylamine, triethylamine, i-propylamine, butylamine and i-butylamine, phenol, o-cresol and m. −
Cresol, p-cresol, thymol, p-t-butylphenol, t-butylcatechol, catechol, isoeugenol, o-methoxyphenol, 4,4'-
Dihydroxyphenyl-2,2-propane, isoamyl salicylate, benzyl salicylate, methyl salicylate,
Phenols such as 2,6-di-t-butyl-p-cresol, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-).
Of 3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 1,2,3-benzotriazole, or 1-[(N, N-bis-2-ethylhexyl) aminomethyl] benzotriazole Examples thereof include triazoles.

The mixed solvent composition comprising the specific FC in the present invention has the same dissolving power as that of the conventional R113 and can be suitably used for various purposes. Specific examples of such applications include flux, grease, oil, wax, ink removers, paint solvents, extractants, glass, ceramics, plastics, rubber and various metal parts, especially ICs.
Examples thereof include cleaning agents for parts, electric devices, precision machines, optical lenses and the like.

As a cleaning method, hand-wiping, dipping, spraying, shaking, ultrasonic cleaning, steam cleaning, a combination of these, or the like may be adopted.

[0029]

EXAMPLES In Examples 1 to 22, SUS-304 was used.
Test piece (25 mm × 30 mm × 2 mm) was immersed in a machine oil (CQ-30 manufactured by Nippon Oil Co., Ltd.) and then immersed in the cleaning solvent composition of the present invention for 5 minutes to determine the degree of removal of the machine oil. . The results are shown in the following Tables 1 and 2 as ⊚: good removal possible, ∘: almost good, Δ: very small amount remaining, ×: considerably remaining.

In Examples 23 to 33, a glass epoxy printed circuit board (50 mm × 100 mm × 1.6) was used.
mm) The entire surface was coated with flux (Speedy Flux AGF-J-1 manufactured by Asahi Chemical Laboratory) and soldered at a soldering temperature of 260 ° C. using a wave solder machine. Then, it was immersed in the cleaning solvent composition of the present invention for 3 minutes for cleaning, and the degree of flux removal was determined. The result is taken as the degree of removal, ◎: good removal possible, ○: almost good,
Table 3 below shows the evaluation of Δ: trace amount remaining, ×: considerable remaining.

Specific FCs used in the following examples are 1,1,1,3,3,4,4-heptafluorobutane (R347A), 1,1,1,2,4,4,4-. Heptafluorobutane (R347B), 1,1,1,4
4,4-hexafluorobutane (R356), 1,1,
1,2,4,4,4-heptafluoro-2- (trifluoromethyl) butane (R43-10), 1,1,2,
2,3,3,4,4-octafluoropentane (R45
8), 1,1,1,2,2,5,5,6,6,6-decafluorohexane (R55-10A), 1,1,1,
3,3,4,4,6,6,6-decafluorohexane (R55-10B), 1,1,1,2,2,3,3,3
4,4-nonafluorohexane (R569), 1,1,
2,2,3,3,4,4,5,5,6,6-dodecafluoroheptane (R65-12), 1,1,1,2,2
3,3,4,4,5,5,6,6-tridecafluorooctane (R76-13), and 1,1,1,2,2
3,3,4,4,5,5,6,6,7,7,8,8-heptadecafluorodecane (R96-17).

The chlorinated fluorinated hydrocarbons (B) used in the following examples are 2,2-dichloro-1,
1,1-trifluoroethane (R123), 1,1-dichloro-1-fluoroethane (R141b), 3,3-
Dichloro-1,1,1,2,2-pentafluoropropane (R225ca), and 1,3-dichloro-1,
1,2,2,3-pentafluoropropane (R225c
selected from the group of b).

As the solvent (C) soluble in the specific FC used in the following examples, n-pentane (n-Pe) is used.
t), cyclopentane (c-Pet), n-hexane (n-Hex), cyclohexane (c-Hex), methanol (MeOH), ethanol (EtOH), 2-propanol (IPA), acetone (Acet), diethyl. Ether (DEE) and methyl acetate (MeAc),
Ethyl propionate (EtPr), dichloromethane (D
CM), and trans-1,2-dichloroethylene (t-DE).

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

[Table 3]

[0037]

EFFECTS OF THE INVENTION A chain fluorinated carbonization obtained by substituting a part or all of hydrogen atoms of a chain hydrocarbon having 4 or more carbon atoms, which is an active ingredient of a composition of a mixed solvent used in the present invention, with fluorine atoms Hydrogen has the advantage that it contains no chlorine atoms and has no effect on the ozone layer. In addition, the composition of the mixed solvent of the present invention satisfies the excellent properties of the conventional R113, and since it contains chlorinated fluorinated hydrocarbons, it has high selective solubility in oils, etc. There is an advantage that dirt such as flux can be effectively cleaned.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiichi Onishi, Keiichi Onishi, 1160 Matsubara, Hazawa-machi, Kanagawa-ku, Yokohama, Kanagawa Prefecture A-G Technology Co., Ltd. (72) Yoko Usami, Hazawa-machi, Kanagawa-ku, Yokohama 1160 Matsubara AGC Technology Co., Ltd.

Claims (8)

[Claims] 1. A chain fluorinated hydrocarbon (A) and a chlorinated fluorinated hydrocarbon (B) in which a part or all of hydrogen atoms of a chain hydrocarbon having 4 or more carbon atoms are substituted with fluorine atoms. ) A mixed solvent composition comprising: 2. A chain fluorinated hydrocarbon (A) or a chlorinated fluorinated hydrocarbon (B), wherein a part or all of hydrogen atoms of a chain hydrocarbon having 4 or more carbon atoms are substituted with fluorine atoms. And a solvent (C) soluble in the chain fluorinated hydrocarbon (A). 3. A chlorinated fluorinated hydrocarbon (B) is 2,
2-dichloro-1,1,1-trifluoroethane, 1,
1-dichloro-1-fluoroethane, 3,3-dichloro-1,1,1,2,2-pentafluoropropane, and 1,3-dichloro-1,1,2,2,3-pentafluoropropane The mixed solvent composition according to claim 1 or 2, which is at least one selected from the group. 4. The solvent (C) is an alkane having 5 or more carbon atoms (c-1) and a cycloalkane having 5 or more carbon atoms (c-).
2), alcohols (c-3), ketones (c-4),
The mixed solvent composition according to claim 2, which is at least one selected from the group consisting of ethers (c-5), esters (c-6), and halogenated hydrocarbons (c-7). 5. The chlorinated fluorinated hydrocarbon (B) is 2,
2-dichloro-1,1,1-trifluoroethane, 1,
1-dichloro-1-fluoroethane, 3,3-dichloro-1,1,1,2,2-pentafluoropropane, and 1,3-dichloro-1,1,2,2,3-pentafluoropropane At least one selected from the group,
The solvent (C) is an alkane having 5 or more carbon atoms (c-
1), cycloalkanes having 5 or more carbon atoms (c-2), alcohols (c-3), ketones (c-4), ethers (c-5), esters (c-6), and At least 1 selected from the group of halogenated hydrocarbons (c-7)
The mixed solvent composition of claim 2 which is a seed. 6. The content of chlorinated fluorinated hydrocarbons (B) is from 0.1% by weight to 50% by weight,
Or a mixed solvent composition of 5. 7. The content of the solvent (C) is 0.1% by weight.
% To 50% by weight, wherein the mixed solvent composition according to claim 2, 4 or 5. 8. The content of the chlorinated fluorinated hydrocarbon (B) is 0.1% by weight to 50% by weight, and the solvent (C) is used.
The content of 0.1 to 50% by weight.
Or a mixed solvent composition of 5.