JPH067606A - Hydro-extracting composition - Google Patents

Abstract

PURPOSE:To provide a substitutive hydro-extracting solvent comspn. 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 cyclic hydrofluorocarbon having 4-6 carbon atoms and a four- or five-membered ring and contg. at least one hydrogen atom 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 provides a specific hydrofluorocarbon-based draining solvent composition that can be used as an alternative draining solvent that does not affect the ozone layer at all while satisfying the excellent properties of conventional R113. The purpose is.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object. First, the number of carbon atoms is 4 to 4.
A draining solvent composition comprising a cyclic hydrofluorocarbon (A) having 6 or 4 membered ring or 5 membered ring and containing at least one hydrogen atom.

The above-mentioned hydrofluorocarbon (A) is characterized in that it contains no chlorine atom and does not affect the ozone layer at all. Further, since it contains at least one hydrogen atom, 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. Further, the boiling point of hydrofluorocarbon having a carbon number of 4 to 6 and having a 4-membered ring or 5-membered ring structure is close to the boiling point of R113, which is advantageous in applying the conventional draining method.

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

Thirdly, the present invention provides a draining solvent composition comprising the hydrofluorocarbon (A) and a surfactant (C) comprising a salt of an organic acid and an organic base.

Fourthly, the present invention provides a draining solvent composition comprising the hydrofluorocarbon (A), the solvent (B) and the surfactant (C).

In the present invention, it is important to use the above hydrofluorocarbon (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), esters (b-6), hydrohalocarbons (b-
7), and hydrochlorofluorocarbons (b-
At least one selected from the group of 8) and / or the surfactant (C) composed of a salt of an organic acid and an organic base can be used by blending with the specific HFC.

As the specific HFC, a specific HFC in which the number of hydrogen atoms does not exceed the number of fluorine atoms is preferably used because it is flame-retardant.

As the specific HFC, various examples can be given over a wide range. For example, 1,1,2,2,3,3-
Hexafluorocyclobutane, 1,1,2,2,3,4
-Hexafluorocyclobutane, 1,1,2,2,3-
Pentafluoro-3- (trifluoromethyl) cyclobutane, 1,1,2,2,3,3,4,5-octafluorocyclopentane, 1,1,2,2-tetrafluoro-
3- (trifluoromethyl) cyclobutane or 1,
Preferred examples include 1,2,3,4,5-hexafluorocyclopentane. These specific H
FC can 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 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, methyl-t-butyl ether, methyl isobutyl ketone and the like. It is not limited to.

The ethers (b-5) as the solvent (B) soluble in the specific HFC include, but are not limited to, diethyl ether, methyl cellosolve, tetrahydrofuran, 1,4-dioxane and the like. Not something.

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

The surfactant (C) which is a salt of an organic acid and an organic base used in the composition of the present invention 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 draining solvent composition of the present invention contains a specific HF.
Hydrofluorocarbons other than C 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,
Examples thereof include 2,3-pentafluoropropane, 1,1,1,3-tetrafluoropropane, 1,3-difluoropropane, etc., but are not limited thereto.

Into the draining solvent composition of the present invention, the components which have been appropriately added to this type of draining solvent composition in accordance with its use can be added. Examples of such components include auxiliaries and stabilizers for draining 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 water-removing solvent composition comprising the specific HFC of the present invention has a water-removing ability similar to that of 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.

[0030]

[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.

Specific HFCs used in the following examples are 1,1,2,2,3,3-hexafluorocyclobutane (C336A), 1,1,2,2,3,4-hexafluorocyclobutane ( C336B), 1, 1,
2,2,3-Pentafluoro-3- (trifluoromethyl) cyclobutane (C438A), 1,1,2,2
3,3,4,5-octafluorocyclopentane (C4
38B), 1,1,2,2-tetrafluoro-3- (trifluoromethyl) cyclobutane (C447) and 1,1,2,3,4,5-hexafluorocyclopentane (C456). It was

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), and 3,3-dichloro-1,
1,1,2,2-Pentafluoropropane (R225
Selected from the group B).

As the surfactants used in the following examples, caprylic acid caprylamine (ClCA), caproic acid caprylamine (CrCA), hexyl acid caprylamine (HCA), hexyl acid dodecylamine (HD)
A), and stearylamine hexylate (HSA).

[0034]

[Table 1]

[0035]

[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.

[0037]

[Table 3]

[0038]

[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.

[0040]

[Table 5]

[0041]

[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.

[0043]

[Table 7]

[0044]

[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.

[0046]

[Table 9]

[0047]

[Table 10]

In Examples 111 to 117, HCA having a solvent composition was changed to CrCA, ClCA, HDA, or HS.
When the evaluation was performed in place of A, similar results were obtained. Also,
In Example 122, the solvent composition of C-Hex was Pe.
t, Hex, C-Pet, Acet, MEK, MeC
When e, EtAc, DCM, R123, R225A, or R225B was evaluated instead, the same result was obtained.

[0049]

[Table 11]

[0050]

[Table 12]

In Examples 136 to 142, HSA having a solvent composition was mixed with CrCA, HDA, HCA, or ClC.
When the evaluation was performed in place of A, similar results were obtained. Also,
In Example 147, the solvent composition of C-Hex was Pe.
t, Hex, C-Pet, Acet, MEK, MeC
When e, EtAc, DCM, R123, R225A, or R225B was evaluated instead, the same result was obtained.

[0052]

EFFECTS OF THE INVENTION The draining solvent composition comprising a cyclic hydrofluorocarbon having 4 to 6 carbon atoms and having a 4-membered ring or 5-membered ring and containing at least one hydrogen atom is chlorine. It has the advantages that it does not contain atoms and has no effect on the ozone layer, and that it has a short lifetime in the atmosphere and does not contribute to global warming. Besides, conventional R11
3 has the excellent characteristics, in particular the draining characteristics, and has the advantage that the conventional draining method can be applied.

 ─────────────────────────────────────────────────── ─── 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 draining solvent composition comprising a cyclic hydrofluorocarbon (A) having 4 to 6 carbon atoms and having a 4-membered ring or a 5-membered ring and containing at least one hydrogen atom. 2. A cyclic hydrofluorocarbon (A) having a carbon number of 4 to 6 and having a 4-membered ring or a 5-membered ring and containing at least one hydrogen atom, and soluble in the hydrofluorocarbon (A). Draining solvent composition comprising a simple solvent (B). 3. A cyclic hydrofluorocarbon (A) having a carbon number of 4 to 6 and having a 4- or 5-membered ring and containing at least one hydrogen atom, and a salt of an organic acid and an organic base. A draining solvent composition comprising the surfactant (C). 4. A cyclic hydrofluorocarbon (A) having 4 to 6 carbon atoms and having a 4-membered ring or 5-membered ring and containing at least one hydrogen atom, and soluble in the hydrofluorocarbon (A). Draining solvent composition comprising a simple solvent (B) and 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 draining solvent composition according to claim 2 or 4, which is a seed. 6. The draining solvent composition 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 draining solvent composition 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.
50% by weight of the draining solvent composition 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.
Draining solvent composition. 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.
Draining solvent composition.