JPH067608A - Solvent composition used for hydro-extraction - Google Patents

Abstract

PURPOSE:To provide a substitutive solvent compsn. for hydro-extraction having no effect at all on the ozone stratosphere while keeping excellent properties of trichlorotrifluoroethane. CONSTITUTION:As the solvent compsn. for hydro-extraction, a compsn. consisting of a specified hydrofluorocyclohexane having 6 carbon atoms and a six-membered ring and contg 1 or 2 hydrogen atoms is used. This compsn. does not contain a chlorine atom.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a solvent composition used for draining printed circuit boards, electronic parts such as ICs, precision machine parts, glass substrates and the like.

[0002]

2. Description of the Prior Art 1,1,2-Trichloro-1,2,2-trifluoroethane (hereinafter referred to as R113) or R1 which is excellent in nonflammability, low toxicity and stability for various drainers.
A mixed solvent composition of 13 and a solvent soluble therein or a solvent composition of R113 and a surfactant is widely used. R113 has a characteristic that it can remove adhering water without attacking base materials such as metals, plastics and elastomers, so various precision machine parts and various electronic parts made of metals, plastics, elastomers, etc., and mounting these electronic parts It was most suitable for draining printed circuit boards and glass substrates.

[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 R113, an alternative draining solvent that is less likely to destroy the ozone layer is being actively searched. As the alternative draining 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.

Similar to R113, these alternative draining solvents have excellent draining properties, and have very little effect on the ozone layer. However, since these alternative draining solvents contain chlorine atoms, they have a slight effect on the ozone layer, although they are slight. Therefore, it has been desired to develop a further excellent alternative draining solvent that has no influence on the ozone layer.

The present invention is a solvent composition used for draining a specific hydrofluorocyclohexane system which can be used as an alternative draining solvent which does not affect the ozone layer at all while satisfying the excellent properties of conventional R113. The purpose is to provide.

[0007]

The present invention has been made to achieve the above-mentioned object, and firstly, perfluoromonohydrocyclohexane, perfluoro-1,2-dihydrocyclohexane, perfluoro-1. The present invention provides a solvent composition for draining, comprising at least one hydrofluorocyclohexane (A) selected from 1,4-dihydrocyclohexane and perfluoro-1,1-dihydrocyclohexane.

The above hydrofluorocyclohexane (A)
Has a characteristic that it does not contain chlorine atoms and therefore does not affect the ozone layer at all. Furthermore, since it has a 6-membered ring structure, it has high stability and is advantageous in that it is unlikely to be decomposed when used as a draining solvent. On the other hand, by containing 1 or 2 hydrogen atoms, the decomposition rate in the atmosphere is fast,
It has the advantage of not contributing to global warming due to its short life. In addition, the hydrofluorocyclohexane (A) is nonflammable because it has at most two hydrogen atoms, and is suitable as a solvent for draining water.

Secondly, the present invention provides a solvent composition for draining, comprising the hydrofluorocyclohexane (A) and the solvent (B) soluble in the hydrofluorocyclohexane.

Thirdly, the present invention provides a solvent composition used for draining, which comprises the above-mentioned hydrofluorocyclohexane (A) and a surfactant (C) comprising a salt of an organic acid and an organic base. .

Fourthly, the present invention provides a solvent composition comprising the above hydrofluorocyclohexane (A), the above solvent (B) and the above surfactant (C) for use in draining.

In the present invention, it is important to use the above hydrofluorocyclohexane (A) (hereinafter referred to as "specific HFC"). Further, a solvent (B) soluble in a specific HFC, alkanes having 5 or more carbon atoms (b-1), cycloalkanes having 5 or more carbon atoms (b-2), alcohols (b-3), ketones. (B-4), ethers (b-
5), at least one selected from the group of esters (b-6), hydrohalocarbons (b-7), and hydrochlorofluorocarbons (b-8) and / or a salt of an organic acid and an organic base. Surfactant consisting of (C)
Can be used by being mixed with a specific HFC.

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 HFC 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, 2,2,3-trimethylpentane, 2,2,4-
Examples thereof include trimethylpentane, cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, and ethylcyclohexane, but are not limited thereto.

The alcohol (b-3) as the solvent (B) soluble in the specific HFC includes 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 HFC include acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone, but are not limited thereto. is not.

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

Examples of the esters (b-6) as the solvent (B) soluble in the specific HFC include methyl formate, ethyl formate, propyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate and the like. Examples thereof include, but are not limited to.

Hydrohalocarbons (b-7) as a solvent (B) soluble in a specific HFC include dichloromethane, cis-1,2-dichloroethylene and trans-.
Examples thereof include 1,2-dichloroethylene and 2-bromopropane, but are not limited thereto.

The hydrochlorofluorocarbons (b-8) as the solvent (B) soluble in the specific HFC include 2,2-dichloro-1,1,1-trifluoroethane and 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-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 above solvent (B) may be used alone or in combination of two or more.

The surfactant (C) used in the composition of the present invention, which comprises a salt of an organic acid and an organic base, can be variously exemplified in a wide range. Particularly, a salt of a higher fatty acid and a higher aliphatic amine is used. Caprylic acid capryl amine, caproic acid capryl amine, hexyl acid capryl amine, hexyl acid dodecyl amine, hexyl acid stearyl amine and the like can be mentioned as preferable ones. 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 the content of the solvent (B) soluble in the specific HFC is preferably 0.1% by weight to 50%. %, And / or the content of the surfactant (C) consisting of a salt of an organic acid and an organic base is 0.0
It is 01% to 10% by weight.

The solvent composition used for draining of the present invention includes
Hydrofluorocarbons that do not destroy the ozone layer other than the specific HFC can be blended. Such hydrofluorocarbons include 1,2-difluoroethane,
1,1,1,2,3-pentafluoropropane, 1,
1,2,2,3-pentafluoropropane, 1,1,
Examples thereof include 1,3-tetrafluoropropane and 1,3-difluoropropane, but are not limited thereto.

The solvent composition used for draining of the present invention includes
Into a solvent composition conventionally used for this type of draining, a component which has been appropriately added depending on its use can be added. Examples of such components include auxiliary agents and stabilizers for solvent compositions used for draining.

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 used in the present invention for draining a specific HFC has the same level of drainage capacity as the conventional R113 system and can be suitably used for various purposes.

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

[0028]

[Examples] In the following examples, 30 mm x 18 mm
After dipping a 5 mm glass plate in pure water, it was dipped in the solvent composition of the present invention for 20 seconds to drain water, and the taken out glass plate was dipped in anhydrous methanol to remove adhered water from the increased water content. The situation was judged. The degree of removal of the adhered water is taken as the degree of removal, and is shown in Tables 1 to 12 below, which are evaluated as ⊚: good removal is possible, ∘: trace amount remains, and x: considerably remains.

The specific HFC used in the following examples is perfluoromonohydrocyclohexane (PM
H), perfluoro-1,2-dihydrocyclohexane (PDH2), perfluoro-1,4-dihydrocyclohexane (PDH4), and perfluoro-1,1-
Selected from dihydrocyclohexane (PDH1).

Specific HFC-soluble solvents used in the following examples include pentane (Pet), hexane (Hex), cyclopentane (C-Pet), cyclohexane (C-Hex), methanol (MeOH), Ethanol (EtOH), i-propanol (IPA), acetone (Acet), methyl ethyl ketone (MEK),
Methyl cellosolve (MeCe), ethyl acetate (EtA
c), dichloromethane (DCM), 2,2-dichloro-
1,1,1-trifluoroethane (R123), 1,3
-Dichloro-1,1,2,2,3-pentafluoropropane (R225A), or 3,3-dichloro-1,
1,1,2,2-Pentafluoropropane (R225
Selected from B).

As the surfactants used in the following examples, caprylic acid capryl amine (ClCA), caproic acid capryl amine (CrCA), hexyl acid capryl amine (HCA), hexyl acid dodecyl amine (HD).
A), or stearylamine hexylate (HSA).

[0032]

[Table 1]

[0033]

[Table 2]

In Examples 11 to 17, C of the solvent composition was used.
The same result was obtained when the evaluation was performed by replacing lCA with CrCA, HDA, HCA, or HSA. Further, in Example 22, the solvent composition of C-Hex was changed to Pet and He.
x, C-Pet, Acet, MEK, MeCe, EtA
c, DCM, R123, R225A, or R225
When the evaluation was performed in place of B, similar results were obtained.

[0035]

[Table 3]

[0036]

[Table 4]

In Examples 36 to 42, C of the solvent composition was used.
The same result was obtained when the evaluation was performed by replacing lCA with CrCA, HDA, HCA, or HSA. In Example 47, the solvent composition of C-Hex was changed to Pet and He.
x, C-Pet, Acet, MEK, MeCe, EtA
c, DCM, R123, R225A, or R225
When the evaluation was performed in place of B, similar results were obtained.

[0038]

[Table 5]

[0039]

[Table 6]

In Examples 61 to 77, C having a solvent composition was used.
When rCA was replaced with ClCA, HDA, HCA, or HSA for evaluation, similar results were obtained. Further, in Example 72, C-Hex of the solvent composition was changed to Pet and He.
x, C-Pet, Acet, MEK, MeCe, EtA
c, DCM, R123, R225A, or R225
When the evaluation was performed in place of B, similar results were obtained.

[0041]

[Table 7]

[0042]

[Table 8]

In Examples 86 to 92, H of the solvent composition was used.
When DA was replaced with CrCA, ClCA, HCA, or HSA for evaluation, similar results were obtained. Further, in Example 97, C-Hex of the solvent composition was changed to Pet and He.
x, C-Pet, Acet, MEK, MeCe, EtA
c, DCM, R123, R225A, or R225
When the evaluation was performed in place of B, similar results were obtained.

[0044]

At least one selected from perfluoromonohydrocyclohexane, perfluoro-1,2-dihydrocyclohexane, perfluoro-1,4-dihydrocyclohexane and perfluoro-1,1-dihydrocyclohexane used in the present invention. The solvent composition used for draining the seed hydrofluorocyclohexane is
Since it does not contain chlorine atoms, it has the advantage of not affecting the ozone layer at all. Further, when used as a draining solvent, it is advantageous in that it is not easily decomposed due to its structure.
Alternatively, by containing two hydrogen atoms, the decomposition rate in the atmosphere is high and the life is short, so that it has an advantage that it does not contribute to global warming. In addition, it has the advantages that it has excellent characteristics of conventional R113, especially draining characteristics, and is nonflammable because the number of hydrogen atoms is at most two.

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

Claims (10)

[Claims] 1. A perfluoromonohydrocyclohexane,
Solvent composition used for draining at least one hydrofluorocyclohexane (A) selected from perfluoro-1,2-dihydrocyclohexane, perfluoro-1,4-dihydrocyclohexane, and perfluoro-1,1-dihydrocyclohexane object. 2. Perfluoromonohydrocyclohexane,
At least one hydrofluorocyclohexane (A) selected from perfluoro-1,2-dihydrocyclohexane, perfluoro-1,4-dihydrocyclohexane, and perfluoro-1,1-dihydrocyclohexane, and the above hydrofluorocyclohexane (A )
A solvent composition for use in draining, which comprises a solvent (B) soluble in water. 3. Perfluoromonohydrocyclohexane,
At least one hydrofluorocyclohexane (A) selected from perfluoro-1,2-dihydrocyclohexane, perfluoro-1,4-dihydrocyclohexane, and perfluoro-1,1-dihydrocyclohexane, and an organic acid and an organic base. A solvent composition used for draining, which comprises a surfactant (C) comprising the salt of 1. 4. Perfluoromonohydrocyclohexane,
At least one hydrofluorocyclohexane (A) selected from perfluoro-1,2-dihydrocyclohexane, perfluoro-1,4-dihydrocyclohexane, and perfluoro-1,1-dihydrocyclohexane, and the above hydrofluorocyclohexane (A ) Soluble solvent (B), and a solvent composition used for draining, comprising a surfactant (C) comprising a salt of an organic acid and an organic base. 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),
At least one selected from the group consisting of ethers (b-5), esters (b-6), hydrohalocarbons (b-7), and hydrochlorofluorocarbons (b-8).
The solvent composition used for draining according to claim 2 or 4, which is a seed. 6. The solvent composition used for draining according to claim 3, wherein the surfactant (C) is a salt of a higher fatty acid and a higher aliphatic amine. 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), hydrohalocarbons (b-7), and hydrochlorofluorocarbons (b-8).
The solvent composition used for draining according to claim 4, which is a seed and the surfactant (C) is a salt of a higher fatty acid and a higher aliphatic amine. 8. The content of the solvent (B) is 0.1% by weight to.
It is 50% by weight, and the solvent composition used for draining according to claim 2, 4, 5 or 7. 9. The content of the surfactant (C) is 0.00.
1 to 10% by weight, 3, 4, 6 or 7.
A solvent composition used for draining. 10. The content of the solvent (B) is 0.1% by weight.
To 50% by weight, and the content of the surfactant (C) is 0.001% to 10% by weight.
A solvent composition used for draining.