JPH05302098A - Cleaning solvent composition - Google Patents

Abstract

PURPOSE:To obtain a cleaning solvent compsn. having no influence on the ozone layer while securing excellent properties comparable to those of 1,1,2- trichloro-1,2,2-trifluoroethane. CONSTITUTION:A cleaning solvent compsn. is constituted of at least one hydrofluorocarbon of the formula: R1-CH2-R2 [R1 is CnHmF2n+1-m(2<=n<=4; 0<=m<=6); R2 is CaHbF2a+1-b (0<=b<=2 when a=1, 0<=b<=6 when a=2, and 0<=b<=6 when a=3, provided that 3<=n+a<=5 and 0<=m+b<=6)], pref. examples of which include C4H2F8, C4H3F7, C4H4F6, C4H5F5, C4H6F4, C4H7F3, C4H8F2, C5H2F10, C5H3F9, C5H4F8, C5H5F7, C5H6F6, C5H7F5, C5H8F4, C6H2F12, C6H3F11, C6H4F10, C6H5F9, C6H6F8, C6H7F7 and C6H8F6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning solvent composition, and more particularly, to a cleaning composition suitable for removing fluxes, oils and fats, etc. adhering to IC components, precision machine components and the like. Solvent composition.

[0002]

2. Description of the Related Art Conventionally, in the manufacture of IC components and precision mechanical components, cleaning with an organic solvent has been carried out in order to remove flux, dust and the like adhering to the components during assembly. For such washing, 1,1,2-trichloro-1,2,2-trifluoroethane (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 feature that it selectively dissolves only dirt without damaging the base material such as metal, plastic, and elastomer. A printed circuit board that is cleaned by removing flux is a good example of a product made of a base material such as metal, plastic, and elastomer. From this point as well, R113 is useful.

However, since R113 may cause destruction of the ozone layer in the stratosphere, its use has been restricted.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cleaning solvent composition which does not destroy the ozone layer and has the ability to effectively clean flux, oil and the like. is there.

A further object of the present invention is to provide a solvent composition for cleaning, which is characterized in that it does not attack a substrate such as metal, plastic or elastomer and selectively dissolves only dirt.

[0006]

Means for Solving the Problems As a result of extensive research and exploration in order to achieve the above-mentioned objects, the present inventors have obtained the following new findings. That is, certain hydrofluorocarbons (1) do not destroy the ozone layer because they do not contain chlorine in the molecule; (2) their ability to clean flux, oils, dust, etc. is remarkable; and (3) like R113. In addition, it does not attack the base material such as metal, plastic, and elastomer, and selectively dissolves only dirt. The present invention has been completed based on these new findings.

The present invention relates to R1 --CH2 --R2 (wherein R
1 is Cn Hm F2n + 1-m, and 2≤n≤4 and 0≤m
≦ 6. R2 is Ca Hb F2a + 1-b, 0 ≦ b ≦ 2 when a = 1, 0 ≦ b ≦ 6 when a = 2, and 0 ≦ b ≦ 6 when a = 3. .. However, 3 ≦ n +
a ≦ 5 and 0 ≦ m + b ≦ 6. The present invention provides a solvent composition for cleaning comprising a hydrofluorocarbon (A) represented by

The cleaning solvent composition of the present invention comprises the above-mentioned hydrofluorocarbon (A), but such a compound has never been used as a cleaning agent for removing flux, fats and oils.

An example of the hydrofluorocarbon (A) (hereinafter referred to as a specific HFC) in the present invention is C
4 H2 F8, C4 H3 F7, C4 H4 F6, C4 H5 F
5, C4 H6 F4, C4 H7 F3, C4 H8 F2, C5
H2 F10, C5 H3 F9, C5 H4 F, C5 H5 F7,
C5 H6 F6, C5 H7 F5, C5 H8 F4, C6 H2
F12, C6 H3 F11, C6 H4 F10, C6 H5 F9, C
The compound shown by 6H6F8, C6H7F7, or C6H8F6 is mentioned.

As a preferred example of the specific HFC, 1,
1,1,2,2,4,4,4-octafluorobutane,
1,1,1,4,4,4-hexafluorobutane, 1,
1,1,3,3,4,4-heptafluorobutane, 1,
1,1,2,4,4,4-heptafluorobutane, 1,
1,2,2,4,4-hexafluorobutane, 1,1,
1,3,3,4-hexafluorobutane, 1,1,1,
3,4,4-hexafluorobutane, 1,1,1,3
3-pentafluorobutane, 1,1,2,4,4-pentafluorobutane, 1,1,3,3,4-pentafluorobutane, 1,1,1,2,4,4,4-heptafluoro -2- (trifluoromethyl) butane, 1,1,1,
2,2,4,4,5,5,5-decafluoropentane,
1,1,1,2,2,3,3,5,5,5-decafluoropentane, 1,1,1,4,4,4-hexafluoro-2- (trifluoromethyl) butane, 1, 1, 1,
2,3,3,5,5,5-nonafluoropentane, 1,
1,1,2,4,4-hexafluoro-2- (trifluoromethyl) butane, 1,1,1,3,3,5,5,5
-Octafluoropentane, 1,1,3,3,5,5-
Hexafluoropentane, 1,1,1,5,5,5-hexafluoropentane, 1,1,1,3,3,4,4,4
6,6,6-decafluorohexane, 1,1,1,5
5,5-hexafluoro-2- (trifluoromethyl)
Pentane, 1,1,2,2,5,5,6,6-octafluorohexane, 1,1,1,2,2,3,3-heptafluorohexane, 1,1,1,2,2 5, 5, 6,
6,6-decafluorohexane, or 1,1,1,
2,2,5,5,5-octafluoro-4- (trifluoromethyl) pentane and the like can be mentioned.

The specific HFCs can be used alone or in combination of two or more.

The cleaning solvent composition of the present invention comprises:
At least one surfactant may be included.

The surfactant is not particularly limited, but a nonionic surfactant is preferable. As the nonionic surfactant, for example, alkyl and alkylallyl polyoxyethylene ether, alkylallyl formaldehyde condensed polyoxyethylene ether, glycerin ether and its polyoxyethylene ether,
Block polymer having polyoxypropylene as lipophilic group, ether type such as alkylthiopolyoxyethylene ether, propylene glycol ester polyoxyethylene ether, glycerin ester polyoxyethylene ether, sorbitan ester polyoxyethylene ether and other ether ester Type, ester type such as polyoxyethylene fatty acid ester, glycerin ester and sorbitan ester, nitrogen-containing type such as fatty acid alkanolamide, polyoxyethylene fatty acid amide and the like.

The cleaning solvent composition of the present invention comprises:
Contains at least one organic solvent selected from hydrocarbons, alcohols, ethers, esters, ketones, hydrohalocarbons, and hydrochlorofluorocarbons to increase the solubility of oils and fluxes. it can.

The hydrocarbons are not particularly limited, but preferably, for example, 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, 2,2,3-trimethylpentane, 2,2,4-trimethylpentane,
Examples thereof include cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, ethylcyclohexane and the like.

The alcohols are not particularly limited, but are preferably chain saturated alcohols having 1 to 5 carbon atoms, such as methanol, ethanol, i-propanol, n-propanol, n-butanol, i. -Butanol, s-butanol, t-butanol and the like can be mentioned.

The ethers are not particularly limited, but preferred examples include diethyl ether, methyl cellosolve, tetrahydrofuran, and 1,4-dioxane.

The ester is not particularly limited, but preferably is an ester containing a fatty acid having 1 to 5 carbon atoms and a lower alcohol having 1 to 6 carbon atoms as active ingredients, for example, methyl ester. Examples thereof include acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, and ethyl butyrate.

The ketones are not particularly limited, but are preferably those represented by R-CO-R ', wherein R and R'are saturated hydrocarbons each having 1 to 4 carbon atoms. Examples include acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone.

Hydrohalocarbons include dichloromethane, cis-1,2-dichloroethylene and tran.
Examples thereof include, but are not limited to, s-1,2-dichloroethylene and 2-bromopropane.

Hydrochlorofluorocarbons include 2,2-dichloro-1,1,1-trifluoroethane, 1,1-dichloro-1-fluoroethane and 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-pentafluoropropane, 1,2-dichloro-1,1,2,3,3-pentafluoropropane, 2,3-dichloro-1,1,1,2,3-pentafluoro Propane or 2,2-dichloro-1,1,
Examples thereof include 1,3,3-pentafluoropropane, but are not limited thereto.

The content of the specific HFC in the solvent composition for cleaning in the present invention is not particularly limited, but is usually about 70% by weight or more, preferably about 80% by weight or more.

The content of the surfactant in the solvent composition for cleaning is not particularly limited, but is preferably 0.0
It is from 01% by weight to 10% by weight.

The content of the organic solvent in the cleaning solvent composition is not particularly limited, but is usually about 30% by weight or less, preferably about 0.5 to about 10% by weight, more preferably about 1%. Is about 8% by weight. More preferably, the mixture of the specific HFC of the present invention and the organic solvent is an azeotropic composition.

The cleaning solvent composition of the present invention contains a specific H
Hydrofluorocarbons other than FC that do not destroy the ozone layer can be blended. 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.

Into the cleaning solvent composition of the present invention, the components which have been appropriately added to this type of cleaning solvent composition according to the intended use can be added. Examples of such components include auxiliaries and stabilizers of solvent compositions for cleaning.

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.

In removing flux, fats and oils, dust, etc. using the solvent composition for cleaning of the present invention,
Conventional cleaning methods can be applied. Such cleaning methods include hand-wiping, dipping, spraying, shaking, ultrasonic cleaning, steam cleaning and the like.

[0029]

EXAMPLES In Examples 1-44, SUS-304
The 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 solvent composition for cleaning of the present invention for 5 minutes to remove the machine oil. It was judged. The result is taken as the degree of removal, ⊚: good removal is possible, ∘: almost good, Δ: trace amount remains, ×: considerably remains,
The evaluation is shown in Tables 1 and 2 below.

In Examples 45 to 88, a glass epoxy printed circuit board (50 mm × 100 mm × 1.6) was used.
(mm) Flux (Speedy Flux AGF-J-1 manufactured by Asahi Chemical Laboratory) was applied to the entire surface, and soldering was performed using a wave solder machine at a soldering temperature of 260 ° C. Then, it was immersed in the solvent composition for cleaning of the present invention for 3 minutes for cleaning, and the degree of flux removal was determined. The results are shown in Tables 3 to 4 as evaluations of the degree of removal, that is, ⊚: good removal is possible, ∘: almost good, Δ: trace amount remains, and x: considerably remains.

Specific HFCs used in the following examples are 1,1,1,2,2,4,4,4-octafluorobutane (hereinafter referred to as R338), 1,1,1,
4,4,4-hexafluorobutane, 1,1,1,3
3,4,4-heptafluorobutane, 1,1,1,2,
4,4,4-heptafluorobutane, 1,1,2,2
4,4-hexafluorobutane, 1,1,1,3,3,3
4-hexafluorobutane, 1,1,1,3,4,4-
Hexafluorobutane, 1,1,1,3,3-pentafluorobutane, 1,1,2,4,4-pentafluorobutane, 1,1,3,3,4-pentafluorobutane,
1,1,1,2,4,4,4-heptafluoro-2-
(Trifluoromethyl) butane, 1,1,1,2,2,
4,4,5,5,5-decafluoropentane, 1,1,
1,2,2,3,3,5,5,5-decafluoropentane, 1,1,1,4,4,4-hexafluoro-2-
(Trifluoromethyl) butane, 1,1,1,2,3
3,5,5,5-nonafluoropentane, 1,1,1,
2,4,4-hexafluoro-2- (trifluoromethyl) butane, 1,1,1,3,3,5,5,5-octafluoropentane, 1,1,3,3,5,5- Hexafluoropentane, 1,1,1,5,5,5-hexafluoropentane, 1,1,1,3,3,4,4,6,6,6
6-decafluorohexane, 1,1,1,5,5,5-
Hexafluoro-2- (trifluoromethyl) pentane, 1,1,2,2,5,5,6,6-octafluorohexane, 1,1,1,2,2,3,3-heptafluorohexane, 1,1,1,2,2,5,5,6,6,6
-Decafluorohexane, and 1,1,1,2,2
It was selected from the group of 5,5,5-octafluoro-4- (trifluoromethyl) pentane.

The organic solvent soluble in the specific HFC used in the following examples is n-pentane (n-Pe).
t), cyclopentane (c-Pet), n-hexane (n-Hex), cyclohexane (c-Hex), n-
Heptane (n-Hep), methanol (MeOH), ethanol (EtOH), n-propanol (n-PA)
2-propanol (IPA), acetone (Acet),
Methyl ethyl ketone (MEK) or ethyl acetate (EtAc), dichloromethane (DCM), 2,2-
Dichloro-1,1,1-trifluoroethane (R12
3), 1,1-dichloro-1-fluoroethane (R14
1b), 1,3-dichloro-1,1,2,2,3-pentafluoropropane (R225A), and 3,3-dichloro-1,1,1,2,2-pentafluoropropane (R225B). 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), glycerin ether (GRET).

[0034]

[Table 1]

[0035]

[Table 2]

In Examples 1 to 44, R3 having a solvent composition was used.
38 for 1,1,1,4,4,4-hexafluorobutane, 1,1,1,3,3,4,4-heptafluorobutane, 1,1,1,2,4,4,4- Heptafluorobutane, 1,1,2,2,4,4-hexafluorobutane,
1,1,1,3,3,4-hexafluorobutane, 1,
1,1,3,4,4-hexafluorobutane, 1,1,
1,3,3-pentafluorobutane, 1,1,2,4
4-pentafluorobutane, 1,1,3,3,4-pentafluorobutane, 1,1,1,2,4,4,4-heptafluoro-2- (trifluoromethyl) butane, 1,
1,1,2,2,4,4,5,5,5-decafluoropentane, 1,1,1,2,2,3,3,5,5,5-decafluoropentane, 1,1, 1,4,4,4-hexafluoro-2- (trifluoromethyl) butane, 1,
1,1,2,3,3,5,5,5-nonafluoropentane, 1,1,1,2,4,4-hexafluoro-2-
(Trifluoromethyl) butane, 1,1,1,3,3,3
5,5,5-octafluoropentane, 1,1,3
3,5,5-hexafluoropentane, 1,1,1,
5,5,5-hexafluoropentane, 1,1,1,
3,3,4,4,6,6,6-decafluorohexane,
1,1,1,5,5,5-hexafluoro-2- (trifluoromethyl) pentane, 1,1,2,2,5,5
6,6-octafluorohexane, 1,1,1,2,
2,3,3-heptafluorohexane, 1,1,1,
2,2,5,5,6,6,6-decafluorohexane,
Alternatively, the same result was obtained when the evaluation was performed by replacing 1,1,1,2,2,5,5,5-octafluoro-4- (trifluoromethyl) pentane.

[0037]

[Table 3]

[0038]

[Table 4]

In Examples 45 to 88, R of the solvent composition was used.
338 is 1,1,1,4,4,4-hexafluorobutane, 1,1,1,3,3,4,4-heptafluorobutane, 1,1,1,2,4,4,4- Heptafluorobutane, 1,1,2,2,4,4-hexafluorobutane,
1,1,1,3,3,4-hexafluorobutane, 1,
1,1,3,4,4-hexafluorobutane, 1,1,
1,3,3-pentafluorobutane, 1,1,2,4
4-pentafluorobutane, 1,1,3,3,4-pentafluorobutane, 1,1,1,2,4,4,4-heptafluoro-2- (trifluoromethyl) butane, 1,
1,1,2,2,4,4,5,5,5-decafluoropentane, 1,1,1,2,2,3,3,5,5,5-decafluoropentane, 1,1, 1,4,4,4-hexafluoro-2- (trifluoromethyl) butane, 1,
1,1,2,3,3,5,5,5-nonafluoropentane, 1,1,1,2,4,4-hexafluoro-2-
(Trifluoromethyl) butane, 1,1,1,3,3,3
5,5,5-octafluoropentane, 1,1,3
3,5,5-hexafluoropentane, 1,1,1,
5,5,5-hexafluoropentane, 1,1,1,
3,3,4,4,6,6,6-decafluorohexane,
1,1,1,5,5,5-hexafluoro-2- (trifluoromethyl) pentane, 1,1,2,2,5,5
6,6-octafluorohexane, 1,1,1,2,
2,3,3-heptafluorohexane, 1,1,1,
2,2,5,5,6,6,6-decafluorohexane,
Alternatively, when the evaluation was performed by replacing 1,1,1,2,2,5,5,5-octafluoro-4- (trifluoromethyl) pentane, the same results were obtained.

[0040]

R1 --CH2 --R2 (wherein R1 is Cn Hm F2n + 1-m, and 2≤n≤4 and 0≤m≤6. R2 is Ca Hb F2a + 1). -b, a
= 1, 0 ≦ b ≦ 2, and a = 2, 0 ≦ b ≦ 6
And when a = 3, 0 ≦ b ≦ 6. However, 3 ≦
n + a ≦ 5 and 0 ≦ m + b ≦ 6. The solvent composition for cleaning comprising a hydrofluorocarbon represented by) does not destroy the ozone layer, satisfies the excellent characteristics of the conventional R113, and is effective for stains such as oil and flux. It has the advantage that it can be washed.

(72) Inventor Keiichi Onishi 1160 Matsubara, Hazawa-machi, Kanagawa-ku, Yokohama, Kanagawa Prefecture A-Tech Co., Ltd. (72) Yoko Yoko Usami 1160, Matsubara, Hazawa-machi, Kanagawa-ku, Yokohama, Kanagawa Local AZ Technology Co., Ltd.

Claims (9)

[Claims] 1. R1 --CH2 --R2 (wherein R1 is Cn H
m F2n + 1-m, and 2 ≦ n ≦ 4 and 0 ≦ m ≦ 6. R2 is Ca Hb F2a + 1-b, and when a = 1, 0≤
b ≦ 2, 0 ≦ b ≦ 6 when a = 2, and a = 3
In this case, 0 ≦ b ≦ 6. However, 3 ≦ n + a ≦ 5 and 0 ≦ m + b ≦ 6. ) A solvent composition for cleaning comprising a hydrofluorocarbon (A) represented by 2. The hydrofluorocarbon (A) is C4
H2 F8, C4 H3 F7, C4 H4 F6, C4 H5 F5
, C4 H6 F4, C4 H7 F3, C4 H8 F2, C5
H2 F10, C5 H3 F9, C5 H4 F, C5 H5 F7,
C5 H6 F6, C5 H7 F5, C5 H8 F4, C6 H2
F12, C6 H3 F11, C6 H4 F10, C6 H5 F9, C
The solvent composition for cleaning according to claim 1, which is at least one selected from the group consisting of 6 H6 F8, C6 H7 F7, and C6 H8 F6. 3. The hydrofluorocarbon (A) is 1,
1,1,2,2,4,4,4-octafluorobutane,
1,1,1,4,4,4-hexafluorobutane, 1,
1,1,3,3,4,4-heptafluorobutane, 1,
1,1,2,4,4,4-heptafluorobutane, 1,
1,2,2,4,4-hexafluorobutane, 1,1,
1,3,3,4-hexafluorobutane, 1,1,1,
3,4,4-hexafluorobutane, 1,1,1,3
3-pentafluorobutane, 1,1,2,4,4-pentafluorobutane, 1,1,3,3,4-pentafluorobutane, 1,1,1,2,4,4,4-heptafluoro -2- (trifluoromethyl) butane, 1,1,1,
2,2,4,4,5,5,5-decafluoropentane,
1,1,1,2,2,3,3,5,5,5-decafluoropentane, 1,1,1,4,4,4-hexafluoro-2- (trifluoromethyl) butane, 1, 1, 1,
2,3,3,5,5,5-nonafluoropentane, 1,
1,1,2,4,4-hexafluoro-2- (trifluoromethyl) butane, 1,1,1,3,3,5,5,5
-Octafluoropentane, 1,1,3,3,5,5-
Hexafluoropentane, 1,1,1,5,5,5-hexafluoropentane, 1,1,1,3,3,4,4,4
6,6,6-decafluorohexane, 1,1,1,5
5,5-hexafluoro-2- (trifluoromethyl)
Pentane, 1,1,2,2,5,5,6,6-octafluorohexane, 1,1,1,2,2,3,3-heptafluorohexane, 1,1,1,2,2,2 5, 5, 6,
6,6-decafluorohexane, and 1,1,1,
The solvent composition for cleaning according to claim 1, which is at least one selected from the group of 2,2,5,5,5-octafluoro-4- (trifluoromethyl) pentane. 4. The cleaning solvent composition according to claim 1, which contains at least one surfactant. 5. Hydrocarbons, alcohols, ethers,
The solvent composition for cleaning according to claim 1 or 4, containing at least one organic solvent selected from esters, ketones, hydrohalocarbons, and hydrochlorofluorocarbons. 6. The solvent composition for cleaning according to claim 4, wherein the surfactant is a nonionic surfactant. 7. The cleaning solvent composition according to claim 1, 4 or 5, wherein the hydrofluorocarbon (A) in the cleaning solvent composition is at least 70% by weight. 8. The surfactant in the solvent composition for cleaning is less than 0.1%.
The solvent composition for cleaning according to claim 4 or 6, which is 001% by weight to 10% by weight. 9. The cleaning solvent composition according to claim 5, wherein the organic solvent in the cleaning solvent composition is 30% by weight or less.