JPH06145081A - Solvent composition for cleaning - Google Patents

Abstract

PURPOSE:To provide a substitute cleaning solvent composition free from influence on ozonosphere while keeping the excellent characteristics of conventional trichlorotrifluoroethane solvent. CONSTITUTION:A composition composed of a fluorinated chain hydrocarbon having fluorine atoms substituting a part or total of hydrogen atoms of a >=7C chain hydrocarbon is used as a cleaning solvent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solvent composition used for cleaning, and in particular, it is used for cleaning suitable for removing fluxes, oils and fats attached to ICs, electronic parts, precision machine parts and the like. It relates to a solvent 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. Furthermore, R113 has an excellent feature 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, these alternative cleaning solvents have a slight effect on the ozone layer because they contain chlorine atoms. Therefore, it is desired to develop a more excellent alternative cleaning solvent that does not affect the ozone layer at all.

The present invention provides a novel fluorinated hydrocarbon-based cleaning solvent composition which can be used as an alternative cleaning solvent which does not affect the ozone layer at all while satisfying the excellent properties of conventional R113. That is the purpose.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solvent composition used for cleaning, and in particular, it is used for cleaning suitable for removing fluxes, oils and fats attached to ICs, electronic parts, precision machine parts and the like. It relates to a solvent composition.

[0007]

The present invention has been made to achieve the above-mentioned object. First, a part or all of hydrogen atoms of a chain hydrocarbon having 7 or more carbon atoms is fluorine. The present invention provides a solvent composition for cleaning, which comprises a chain fluorinated hydrocarbon (A) substituted with atoms.

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, since it has 7 or more carbon atoms, it has a relatively high boiling point, which is advantageous in that the solvent recovery is easy.

Secondly, the present invention provides a solvent composition for cleaning, which comprises the above chain fluorinated hydrocarbon (A) and the solvent (B) soluble in the above chain fluorinated hydrocarbon (A). To do.

Thirdly, the present invention provides a solvent composition for cleaning, which comprises the chain fluorinated hydrocarbon (A) and the nonionic surfactant (C).

Fourthly, the present invention provides a solvent composition comprising the chain fluorinated hydrocarbon (A), the solvent (B) and the nonionic surfactant (C) for cleaning. Is.

In the present invention, it is important to use the above-mentioned chain fluorinated hydrocarbon (A) (hereinafter referred to as a specific FC), and conventionally such compounds have been used as a cleaning agent for removing flux, oil and fat. It was never done.

Further, in the present invention, an alkane having a carbon number of 5 or more (b-) which is a solvent (B) soluble in a specific FC.
1), cycloalkanes having 5 or more carbon atoms (b-2), alcohols (b-3), ketones (b-4), ethers (b-5), esters (b-6), halogen At least one selected from the group of chlorinated hydrocarbons (b-7) and chlorinated fluorinated hydrocarbons (b-8) and / or an ether type or ether ester which is a nonionic surfactant (C) Type, ester type, and nitrogen-containing type, at least one selected from the group can be used by blending with the specific FC.

As the specific FC, one containing at least one hydrogen atom is preferably used since it does not contribute to global warming because it decomposes rapidly in the atmosphere and has a short life. 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 7 or more carbon atoms, but preferably 7 to 8
A material having a boiling point of about 10 is selected, and a material having a boiling point of about 10 has a suitable boiling point from the viewpoint of cleaning applications and solvent recovery, and thus is preferably used.

The specific FC can be variously exemplified in a wide range, for example, 1, 1, 2, 2, 3, 3,
4,4,5,5,6,6-dodecafluoroheptane,
1,1,1,2,2,3,3,5,6,6-decafluoro-4,4-bis (trifluoromethyl) hexane,
1,1,1,2,2,3,3,6-octafluoro-
4,4-bis (trifluoromethyl) hexane, 1,
1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctane, 1,1,1,6,6,6-hexafluoro-3,4-bis ( Trifluoromethyl) hexane, 1,1,1,2,2,3,3,5,6,6,6
-Undecafluoro-4,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3,3,4,4,4
5,6,6,7,7,8,8,8-heptadecafluorooctane, 1,1,1,2,2,3,3,4,4,5
5,6,7,7,7-pentadecafluoroheptane or 1,1,1,2,2,3,3,4,4,5,5,6
Preferred examples include 6,7,7,8,8-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 (b-1) and cycloalkanes having 5 or more carbon atoms (b-2) as the solvent (B) 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 (b-3) as the solvent (B) 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 (b-4) as the solvent (B) soluble in the specific FC include, but are not limited to, acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone. is not.

The ethers (b-5) as the solvent (B) soluble in the specific FC include diethyl ether, methyl cellosolve, tetrahydrofuran, methyl-t-butyl ether, 1,4-dioxane and the like. However, it is not limited to this.

The esters (b-6) as the solvent (B) 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.

The halogenated hydrocarbons (b-7) as the solvent (B) soluble in the specific FC include dichloromethane, cis-1,2-dichloroethylene and trans-.
Examples thereof include 1,2-dichloroethylene, trichloroethylene, tetrachloroethylene, and 2-bromopropane, but are not limited thereto.

Further, as the chlorinated fluorinated hydrocarbons (b-8) as the solvent (B) soluble in the specific FC, 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, 1,1-dichloro-1,2,2,3,3-pentafluoropropane, 1,2-dichloro-1,1,3,3
3,3-pentafluoropropane, 1,2-dichloro-
1,1,2,3,3-pentafluoropropane, 2,3
-Dichloro-1,1,1,2,3-pentafluoropropane, or 2,2-dichloro-1,1,1,3,3-
Examples thereof include pentafluoropropane, but are not limited thereto.

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

The nonionic surfactant (C) used in the composition of the present invention is not particularly limited, but preferably, for example, alkyl polyoxyethylene ether, alkyl allyl polyoxyethylene ether, alkyl allyl. Formaldehyde condensed polyoxyethylene ether, glycerin ether and its polyoxyethylene ether, block polymer having polyoxypropylene as a lipophilic group, ether type such as alkylthiopolyoxyethylene ether, polyoxyethylene ether of propylene glycol ester, of glycerin ester Ether ester type such as polyoxyethylene ether and sorbitan ester polyoxyethylene ether, polyoxyethylene fatty acid ester, glycerin ester,
Examples thereof include ester type such as sorbitan ester and nitrogen-containing type such as fatty acid alkanolamide and polyoxyethylene fatty acid amide. The surfactant (C) may be used alone or in combination of two or more.

When used as a mixed composition in the present invention, the mixing ratio is not particularly limited, but preferably the content of the solvent (B) soluble in the specific FC is
It is about 0.1 to 50% by weight, and the content of the nonionic surfactant (C) is about 0.001 to 10% by weight.

Hydrocarbons which do not destroy the ozone layer other than the specific FC can be added to the solvent composition used for cleaning of the present invention. Such hydrocarbons include 1,2-difluoroethane, 1,1,1,2,3-
Examples include pentafluoropropane, 1,1,2,2,3-pentafluoropropane, 1,1,1,3-tetrafluoropropane, and 1,3-difluoropropane, but are not limited thereto. Absent.

Further, the solvent composition used in the cleaning of the present invention may contain the components which have been appropriately added to the cleaning solvent composition of this type 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 solvent composition of the present invention used for cleaning, which has a specific FC, has a dissolving power comparable to that of the conventional R113 system and can be suitably used for various purposes. Such specific applications include flux, grease, oil, wax,
Ink removal agents, paint solvents, extractants, glass, ceramics, plastics, rubber, metal parts,
In particular, cleaning agents for IC parts, electric equipment, precision machines, optical lenses and the like can be mentioned.

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

[0031]

EXAMPLES In Examples 1-44, SUS-304
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 45 to 88, 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 to Table 4 below show the evaluations of Δ: small amount remaining, x: considerable remaining.

Specific fluorinated hydrocarbons used in the following examples include 1,1,2,2,3,3,4,4,4.
5,5,6,6-Dodecafluoroheptane (12F
H), 1,1,1,2,2,3,3,5,6,6-decafluoro-4,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3, 3,6-octafluoro-4,4-bis (trifluoromethyl) hexane, 1,
1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctane, 1,1,1,6,6,6-hexafluoro-3,4-bis ( Trifluoromethyl) hexane, 1,1,1,2,2,3,3,5,6,6,6
-Undecafluoro-4,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3,3,4,4,4
5,6,6,7,7,8,8,8-heptadecafluorooctane, 1,1,1,2,2,3,3,4,4,5
5,6,7,7,7-pentadecafluoroheptane and 1,1,1,2,2,3,3,4,4,5,5,6
It was selected from the group of 6,7,7,8,8-heptadecafluorodecane.

Specific FC-soluble solvents used in the following examples are n-pentane (n-Pet), cyclopentane (c-Pet), n-hexane (n-He).
x), cyclohexane (c-Hex), n-heptane (n-Hep), methanol (MeOH), ethanol (EtOH), n-propanol (n-PA), 2-propanol (IPA), acetone (Acet), Methyl ethyl ketone (MEK), ethyl acetate (EtA
c), dichloromethane (DCM), 1,1-dichloro-
1-fluoroethane (R141b), 1,3-dichloro-1,1,2,2,3-pentafluoropropane (R2
25A), 3,3-dichloro-1,1,1,2,2-pentafluoropropane (R225B), and 2,2-
Dichloro-1,1,1-trifluoroethane (R12
3) selected from the group.

The surfactant used in the following examples was alkyl polyoxyethylene ether (APO
EE), glycerin ester polyethoxyethylene ether (GEPEE), polyoxyethylene fatty acid ester (POEFE), ester of glycerin ether (G
RETES), alkyl polyoxyethylene ether ester (APOEES), sorbitan ester (SO
RES), glycerin ester (GRES), fatty acid alkanolamide (FAAD), and glycerin ether (GRET).

[0036]

[Table 1]

[0037]

[Table 2]

In Examples 1 to 44, the solvent composition of 12
FH is converted into 1,1,1,2,2,3,3,5,6,6-decafluoro-4,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3, 3,6-octafluoro-4,4-bis (trifluoromethyl) hexane,
1,1,1,2,2,3,3,4,4,5,5,6,6
-Tridecafluorooctane, 1,1,1,6,6,6
-Hexafluoro-3,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3,3,5,6
6,6-Undecafluoro-4,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3,3,3
4,4,5,6,6,7,7,8,8,8-heptadecafluorooctane, 1,1,1,2,2,3,3,4,4
4,5,5,6,7,7,7-pentadecafluoroheptane and 1,1,1,2,2,3,3,4,5,5
When 5,6,6,7,7,8,8-heptadecafluorodecane was used for the evaluation, the same result was obtained.

[0039]

[Table 3]

[0040]

[Table 4]

In Examples 45 to 88, the solvent composition of 1 was used.
2FH to 1,1,1,2,2,3,3,5,6,6-
Decafluoro-4,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3,3,6-octafluoro-4,4-bis (trifluoromethyl) hexane,
1,1,1,2,2,3,3,4,4,5,5,6,6
-Tridecafluorooctane, 1,1,1,6,6,6
-Hexafluoro-3,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3,3,5,6
6,6-Undecafluoro-4,4-bis (trifluoromethyl) hexane, 1,1,1,2,2,3,3,3
4,4,5,6,6,7,7,8,8,8-heptadecafluorooctane, 1,1,1,2,2,3,3,4,4
4,5,5,6,7,7,7-pentadecafluoroheptane and 1,1,1,2,2,3,3,4,5,5
When 5,6,6,7,7,8,8-heptadecafluorodecane was used for the evaluation, the same result was obtained.

[0042]

INDUSTRIAL APPLICABILITY A solvent composition used for washing comprising a chain fluorinated hydrocarbon in which a part or all of the hydrogen atoms of the chain hydrocarbon having 7 or more carbon atoms used in the present invention is substituted with fluorine atoms, However, it has the advantage that it does not contain chlorine atoms and does not affect the ozone layer at all. Furthermore, conventional R113
Has the advantages that it has excellent characteristics, can effectively clean dirt such as fats and oils, flux, and is easy in recovering the solvent.

 ─────────────────────────────────────────────────── ─── 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 (10)

[Claims] 1. A solvent composition for cleaning, which comprises a chain fluorinated hydrocarbon (A) obtained by substituting a part or all of hydrogen atoms of a chain hydrocarbon having 7 or more carbon atoms with fluorine atoms. 2. A chain fluorinated hydrocarbon (A) obtained by substituting a part or all of hydrogen atoms of a chain hydrocarbon having 7 or more carbon atoms with fluorine atoms, and the chain fluorinated hydrocarbon (A). ) A solvent composition for cleaning, comprising a solvent (B) soluble in 3. A chain fluorinated hydrocarbon (A) obtained by substituting a part or all of hydrogen atoms of a chain hydrocarbon having 7 or more carbon atoms with a fluorine atom and a nonionic surfactant (C). A solvent composition used for cleaning. 4. A chain fluorinated hydrocarbon (A) in which a part or all of hydrogen atoms of a chain hydrocarbon having 7 or more carbon atoms is substituted with a fluorine atom, and the chain fluorinated hydrocarbon (A). ) A solvent composition used for cleaning, comprising a solvent (B) soluble in) and a nonionic surfactant (C). 5. The solvent (B) is an alkane (b-1) having 5 or more carbon atoms, and a cycloalkane (b-) having 5 or more carbon atoms.
2), alcohols (b-3), ketones (b-4),
It is at least one selected from the group consisting of ethers (b-5), esters (b-6), halogenated hydrocarbons (b-7), and chlorinated fluorinated hydrocarbons (b-8). A solvent composition used for cleaning according to claim 2 or 4. 6. The solvent composition used for cleaning according to claim 3, wherein the nonionic surfactant (C) is at least one selected from the group consisting of ether type, ether ester type, ester type and nitrogen-containing type. object. 7. The solvent (B) is an alkane (b-1) having 5 or more carbon atoms, and a cycloalkane (b-) having 5 or more carbon atoms.
2), alcohols (b-3), ketones (b-4),
At least one selected from the group consisting of ethers (b-5), esters (b-6), halogenated hydrocarbons (b-7), and chlorinated fluorinated hydrocarbons (b-8). The solvent composition for cleaning according to claim 4, wherein the nonionic surfactant (C) is at least one selected from the group consisting of ether type, ether ester type, ester type, and nitrogen-containing type. 8. The content of the solvent (B) is 0.1% by weight.
The solvent composition used for cleaning according to claim 2, 4, 5 or 7 is about 50% by weight. 9. The content of the nonionic surfactant (C) is
It is 0.001% by weight to 10% by weight.
Alternatively, the solvent composition used for the washing of 7. 10. The content of the solvent (B) is 0.1% by weight to 50% by weight, and the content of the nonionic surfactant (C) is 0.001% by weight to 10% by weight. The solvent composition used for cleaning according to claim 4 or 7.