JPH0559396A - Stabilized mixed solvent composition - Google Patents

Abstract

PURPOSE:To obtain the title composition having stability in steam cleaning, comprising not only a specific dichloropentafluoropropane, a specific hydrocarbon and a specific alcohol but also stabilizer such as a nitro compound. CONSTITUTION:The objective composition comprising (A) 3,3-dichloro-1,1,1,2,2- pentafluoropropane and/or 1,3-dichloro-1,1,2,2,3-pentafluoropropane, (B) one or more hydrocarbons selected from a group consisting of dichloropentane, 2-methylpentane, 3-methylpentane, n-hexane and cyclohexane, (C) one or more alcohols selected from methanol, ethanol and propanol and (D) one or more selected from nitro compounds, phenols, amines, ethers, amylenes, esters, organic phosphites, epoxides, pyrroles, alcohols, ketones and triazoles as a stabilizer.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a stabilized fluorinated chlorinated hydrocarbon-based mixed solvent composition.

[0002]

2. Description of the Prior Art The applicant has already reported that 3,3-dichloro-1,
1,1,2,2-Pentafluoropropane (R225c
a) and at least one selected from the group consisting of 1,3-dichloro-1,1,2,2,3-pentafluoropropane (R225cb), hydrocarbons such as cyclopentane, and alcohols such as ethanol. A mixed solvent composition consisting of is proposed.

[0003]

The mixed solvent composition is suitable for cleaning IC parts, precision machine parts and various other articles, but is not always sufficient in terms of thermal stability in steam cleaning. The present invention aims to provide a stabilized mixed solvent composition as described above.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and is 3,3-dichloro-1,
1,1,2,2-pentafluoropropane and 1,3
At least one member selected from the group of dichloro-1,1,2,2,3-pentafluoropropane, and a group of cyclopentane, 2-methylpentane, 3-methylpentane, n-pentane, n-hexane and cyclohexane A mixed solvent composition comprising at least one hydrocarbon selected from the group consisting of at least one alcohol selected from the group consisting of methanol, ethanol and 2-propanol, and a nitro compound, a phenol, an amine, an ether. , Amylenes, esters, organic phosphites,
It is intended to provide a stabilized mixed solvent composition comprising at least one stabilizer selected from the group of epoxides, pyrroles, alcohols, ketones and triazoles.

In the mixed solvent composition of the present invention, R22
When 5ca and R225cb are mixed and used, the composition ratio of both is not particularly limited, but preferably R22
5ca is 0.01 to 99.99% by weight, and R225cb is 0.01 to 99.99% by weight.

Hydrocarbons in the present invention include cyclopentane, 2-methylpentane, 3-methylpentane, n-
It is selected from the group consisting of pentane, n-hexane and cyclohexane, but other hydrocarbons having 5 to 8 carbon atoms such as methylcyclopentane, methylcyclohexane, 2,2,4-trimethylpentane and n-. Octane may be included.

In the case of a mixture of two or more kinds selected from cyclopentane, 2-methylpentane, 3-methylpentane, n-pentane, n-hexane and cyclohexane, the respective proportions in the mixture are 0.01-9.
It can be appropriately changed within the range of 9.99% by weight.

The alcohols are one or two selected from the group consisting of methanol, ethanol and 2-propanol.
In the case of a mixture of two or more species, the proportion of each alcohol in the mixture can be selected from the range of 0.01 to 99.99% by weight.

The mixed composition ratio of the mixed solvent composition in the present invention is not particularly limited, but preferably R2.
25ca and at least one of R225cb 50 to 9
8% by weight, cyclopentane, 2-methylpentane, 3-
The composition is 1 to 49% by weight of at least one kind of hydrocarbons selected from the group of methylpentane, n-pentane, n-hexane and cyclohexane and 1 to 49% by weight of alcohols.

Considering detergency, it is preferable that the content of alcohols or cyclopentane is large, but depending on the type of alcohol, when the content of alcohols exceeds 49% by weight or hydrocarbons are contained, If it exceeds 10% by weight, the solvent composition has a flash point, and equipment such as explosion-proof is required, which is not preferable.

Preferred examples of mixed solvent compositions which are stabilized according to the present invention are: R225ca / R
225cb / cyclopentane / methanol, R225c
a / R225cb / cyclopentane / ethanol, R2
25ca / R225cb / cyclopentane / 2-propanol, R225ca / R225cb / cyclohexane / methanol, R225ca / R225cb / cyclohexane / ethanol, R225ca / R225cb / cyclohexane / 2-propanol, R225ca / R2
25cb / cyclopentane / 2-methylpentane / methanol, R225ca / R225cb / cyclopentane / 2-methylpentane / ethanol, R225ca / R
225cb / cyclopentane / 2-methylpentane / 2
-Propanol, R225ca / R225cb / cyclopentane / 3-methylpentane / methanol, R225
ca / R225cb / cyclopentane / 3-methylpentane / ethanol, R225ca / R225cb / cyclopentane / 3-methylpentane / 2-propanol,
R225ca / R225cb / cyclopentane / n-pentane / methanol, R225ca / R225cb / cyclopentane / n-pentane / ethanol, R225c
a / R225cb / cyclopentane / n-pentane / 2
-Propanol, R225ca / R225cb / cyclopentane / n-hexane / methanol, R225ca /
R225cb / cyclopentane / n-hexane / ethanol, R225ca / R225cb / cyclopentane /
n-hexane / 2-propanol, R225ca / R2
25cb / cyclopentane / cyclohexane / methanol, R225ca / R225cb / cyclopentane / cyclohexane / ethanol, R225ca / R225c
b / cyclopentane / cyclohexane / 2-propanol,

The mixed solvent composition of the present invention can be used as a solvent for various purposes. When it is used as a flux cleaning agent, a degreasing cleaning agent, a cleaning agent for dry cleaning, etc., it may be steam-cleaned and thermally stable. Need to be converted. In particular, if the object to be cleaned or the material of the cleaning device is a metal (iron, zinc, aluminum, copper, brass, various alloys, etc.), the influence of this metal causes further instability.

The present invention is directed to nitro compounds, phenols, amines, ethers, amylenes, esters,
It can be well stabilized by adding at least one stabilizer selected from the group of organic phosphites, epoxides, pyrroles, alcohols, ketones and triazoles to the mixed solvent composition.

These stabilizers can be used singly or as a mixture of two or more kinds, and when the use condition of the mixed solvent composition is severe and a high stabilizing effect is required, it is stable. The mixed use of agents is effective. The amount of the stabilizer added is not particularly limited, but is 1 ppm to 10%, preferably 10 ppm to 5%, and more preferably 100 pp, based on parts by weight with respect to the present mixed solvent composition.
It is m to 3%.

The nitro compounds include nitromethane,
It is selected from nitroethane, 1-nitropropane, 2-nitropropane, nitrobenzene and the like. More preferred are nitromethane and nitroethane.

As phenols, phenol and o-
Cresol, m-cresol, p-cresol, thymol, pt-butylphenol, t-butylcatechol, catechol, isoeugenol, o-methoxyphenol, 4,4'-dihydroxyphenyl-2,2-propane, isoamyl salicylate, Benzyl salicylate,
It is selected from methyl salicylate, 2,6-di-t-butyl-p-cresol and the like. More preferably, phenol, 4,4'-dihydroxyphenyl-2,2-
Propane, 2,6-di-t-butyl-p-cresol.

The amines include pentylamine, hexylamine, diisopropylamine, diisobutylamine, di-n-propylamine, diallylamine, triethylamine, N-methylaniline, pyridine, picoline, morpholine, N-methylmorpholine, triallylamine, Allylamine, α-methylbenzylamine, methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, propylamine, isopropylamine, dipropylamine, butylamine, isobutylamine, s-butylamine, t-butylamine, dibutylamine, tributylamine, dipentyl. Amine, tripentylamine, 2-ethylhexylamine, aniline, N, N-dimethylaniline, N, N-diethylaniline, ethylenedia Emissions, propylene diamine, diethylene triamine, tetraethylene pentamine, benzylamine are those selected dibenzylamine, diphenylamine, diethylhydroxylamine, from the like. More preferred are diisopropylamine and diallylamine.

The ethers include 1,4-dioxane, 1,2-butanediol, isopropyl ether, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, dipropylene glycol methyl ether, ethyl isobutyl ether, ethyl isopropyl. Ether, ethyl isopentyl ether, ethyl naphthyl ether, ethyl vinyl ether, ethyl phenyl ether, anisole, anethole, ethyl propargyl ether, ethyl propyl ether, ethyl methyl ether, ethylene glycol, methyl glycidyl ether,
Ethylene glycol diethyl ether, ethylene glycol diphenyl ether, ethylene glycol dimethyl ether, ethylene glycol monophenyl ether,
Ethylene glycol monobutyl ether, ethylene glycol monobenzyl ether, dipentyl ether, allyl ethyl ether, diisopentyl ether, diallyl ether, butyl glycidyl ether, allyl glycidyl ether, dipropyl ether, ethyl glycidyl ether, vinyl glycidyl ether, dimethyl ether, diethyl ether , Di-n-propyl ether, dibutyl ether, 1,2-dimethoxyethane, trimethoxyethane, triethoxyethane, tetrahydrofuran and the like. More preferred are 1,4-dioxane, butyl glycidyl ether, and 1,2-dimethoxyethane.

The amylenes are preferably α-amylene, β-amylene, γ-amylene, α-isoamylene,
It is selected from β-isoamylene and the like. More preferably, it is β-amylene.

Examples of the esters include methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, isobutyl acetate, isopropyl acetate, ethyl acrylate, 2-hydroxyethyl methacrylate, methyl acrylate, butyl acrylate, acrylic acid. Phenyl, allyl acrylate,
It is selected from caprolactam, ethyl carbamate, methyl carbamate, methyl salicylate and the like. More preferred are methyl acetate, ethyl acetate and methyl salicylate.

The organic phosphites include triphenyl phosphite, tris (nonylphenyl) phosphite, triethyl phosphite, tris (2-ethylhexyl) phosphite, tridecyl phosphite, tributyl phosphite, diphenyl mono (2- Ethylhexyl) phosphite, diphenyl monodecyl phosphite, diphenyl monotridecyl phosphite, dilauryl hydrogen phosphite, diphenyl hydrogen phosphite, tetraphenyl dipropylene glycol pentaerythritol tetraphosphite, trilauryl trithiophosphite, bis ( Tridecyl) pentaerythritol diphosphite, bis (nonylphenyl) pentaerythritol diphosphite, tristearyl phosphite, Distearyl pentaerythritol diphosphite, those selected from tris (2,4-di -t- butyl-phenyl) phosphite. More preferred are triphenyl phosphite and tributyl phosphite.

The epoxides are selected from 1,2-butylene oxide, epichlorohydrin, propylene oxide, 2,3-butylene oxide, styrene oxide and the like. More preferably 1,2-
Butylene oxide and epichlorohydrin.

The pyrroles are selected from N-methylpyrrole, 2-methylpyrrole, 3-methylpyrrole and the like. More preferred is N-methylpyrrole.

Alcohols include s-butanol,
t-butanol, allyl alcohol, benzyl alcohol, t-amyl alcohol, 1-amino-2-propanol, propanol alcohol, 3-methyl-pentyne-
It is selected from 3-ol, 1-methoxy-2-propanol, 3-methyl-1-butyn-3-ol, 2-methyl-3-butyn-3-ol and the like. More preferred are s-butanol and propargyl alcohol.

As the ketones, acetone, methyl ethyl ketone, methyl isobutyl ketone, azodicarboxylic acid amide, maleic acid hydrazide, formamide, N-methylformamide, N, N-dimethylformamide,
It is selected from N, N-diethylformamide, N-methylpropionamide, 2-pyrrolidone, N, N, N ′, N′-tetramethylurea, N-methylpyrrolidone and the like. Acetone and 2-pyrrolidone are more preferable.

The triazoles include 2- (2'-hydroxy-5'-methyl-phenyl) benzotriazole and 2- (2'-hydroxy-3'-t-butyl-5 '.
-Methylphenyl) -5-chlorobenzotriazole,
It is selected from 1,2,3-benzotriazole, 1-[(N, N-bis-2-ethylhexyl) aminomethyl] benzotriazole and the like. More preferably 1,
It is 2,3-benzotriazole.

[0027]

EXAMPLES The following tests were conducted on the mixed solvent composition shown in Table 1 for the purpose of confirming the stabilizing effect of the mixed solvent composition of the present invention. According to JIS-K1600, a mild steel piece was placed in each of the liquid phase portion and the vapor phase portion of the composition shown in Table 1, and 4
The corrosion state of the mild steel piece after 8 hours was observed. The results are shown in Tables 2-9. In the table, ⊚ indicates no corrosion, ○ indicates almost no corrosion, Δ indicates slight corrosion, and × indicates corrosion.

[0028]

[Table 1]

[0029]

[Table 2]

[0030]

[Table 3]

[0031]

[Table 4]

[0032]

[Table 5]

[0033]

[Table 6]

[0034]

[Table 7]

[0035]

[Table 8]

[0036]

[Table 9]

[0037]

EFFECT OF THE INVENTION The stabilized mixed solvent composition of the present invention has an excellent effect of suppressing metal corrosion, as is clear from the examples.
A high stabilization effect can be obtained, and corrosion does not occur during cleaning of electronic parts, electric parts, etc., and the problem of contact failure does not occur.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoko Usami 1150, Hazawa-machi, Kanagawa-ku, Yokohama, Kanagawa Prefecture Asahi Glass Co., Ltd. Central Research Laboratory

Claims (1)

[Claims] 1. 3,3-Dichloro-1,1,1,2,2-
Pentafluoropropane and 1,3-dichloro-1,
At least one selected from the group of 1,2,2,3-pentafluoropropane and at least one selected from the group of cyclopentane, 2-methylpentane, 3-methylpentane, n-pentane, n-hexane and cyclohexane. Species hydrocarbons and methanol, ethanol and 2
A mixed solvent composition comprising at least one alcohol selected from the group of propanol, nitro compounds, phenols, amines, ethers, amylenes, esters, organic phosphites, epoxides, pyrrole Stabilized mixed solvent composition comprising at least one stabilizer selected from the group consisting of compounds, alcohols, ketones and triazoles.