JPH01319593A - Mixed solvent composition - Google Patents

Abstract

PURPOSE:To obtain the subject novel composition with incombustibility or flame resistance suitable for a flux or washing solvent for IC components, dry cleaning, etc., by mixing a trichlorotrifluoroethane with cyclohexane and a dichlorotrifluoroethane. CONSTITUTION:An objective composition obtained by mixing (A) a trichlorotrifluoroethane consisting of R113 and/or R113a, (B) cyclohexane in an amount of 5-35wt.% (preferably <=10wt.% for incombustibility) and (C) a dichlorotrifluoroethane consisting of one or more sorts of R123, R123a and R123b. The above-mentioned composition is advantageous for immersion cleaning by heating, steam cleaning, etc., because of the moderate solvency without a bad influence upon composite parts composed of a metal, plastic and elastomer.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a novel mixed solvent composition having excellent properties as a cleaning solvent for oils and fats, fluxes, IC parts, tri-leaning, etc. .

``Prior art'' There are many types of hydrocarbons, and they are easy to handle by hand, and are widely used as cleaning solvents for oils and fats, fluxes, C parts, precision machine parts, tri-leaning, etc. It is being said.

[Problems to be Solved by the Invention] Although hydrocarbons have excellent performance as solvents, they are all flammable and dangerous in storage and use.

An object of the present invention is to provide a novel mixed solvent composition that is made nonflammable or flame retardant while making use of the excellent properties of conventional compositions.

[Means for Solving the Problems] The present invention relates to a mixed solvent composition comprising trichlorotrifluoroethane, cyclohexane and dichlorotrifluoroethane.

The composition of the present invention is nonflammable or flame retardant, and has a detergency that is equal to or higher than that of conventional hydrocarbons, alcohols, esters, etc.

The hydrocarbons used in the present invention are flammable, but non-flammable dolchlorotrifluoroethane (RII3.RII3a
at least one of the following) and dichlorotrifluoroethane (
Nonflammability or flame retardance can be achieved by adding a mixture of at least one of R123, R123a, and RI23b.

The mixing ratio of cyclohexane is within the range where the mixed solvent is nonflammable or flame retardant, that is, 1 to 50% by weight, preferably 5% by weight.
~35% by weight. Cyclohexane has a higher boiling point than trichlorofluoroethane or dichlorotrifluoroethane, so as the mixed solvent is used repeatedly, the proportion of cyclohexane increases and tends to become flammable. Therefore, in order to make the mixed solvent non-flammable, It is important that the mixing ratio of cyclohexane be 20% by weight or less, preferably 10% by weight or less.

The mixing ratio of trichlorotrifluoroethane and dichlorotrifluoroethane is not particularly limited, and may be selected as long as the mixed solvent is nonflammable or flame retardant.

The mixed solvent composition of the present invention may contain other fluorinated solvents, such as dolchloromonofluoromethane (R1+), dolchlorodifluoromethane (RI22°R]22a, R
122b), trichlorofluoroethane (III31. RI31a, RI31b), dichlorodifluoroethane fRI32°R
132a, 1l132b, RI32c), chlorodifluoroethane (RI33. RI3
3a, RI33b), dichlorofluoroethane (at least one of R141, R141a, R141b), chlorodifluoroethane (R142,
RI42a, RI42b), chlorofluoroethane (at least 1f+1′i of RI51°RI51a) and difluoroethane (R152, RI51a)
52a) etc. can be further mixed and used.

Also, n-pentane, n-hexane, 2-methylbutane,
Other hydrocarbons such as 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane, Nisdels such as methyl acetate 7 isopropyl acetate, methanol, ethanol, isopropyl alcohol, - Alcohols such as butanol and ketones such as methyl edyl ketone may be further mixed at a mixing ratio that makes the mixed solvent nonflammable or flame retardant.

Further, when the mixed solvent composition of the present invention has an azeotropic composition, it is preferable to use the azeotropic composition.

When it is necessary to stabilize the mixed solvent composition of the present invention, stabilizers such as nitro compounds, phenols, amines, ethers, amicins, esters, organic phosphites, epoxides, and furan can be used. At least one member selected from the group consisting of alcohols, ketones, and triazoles can be added.

The amount added is not particularly limited, but is 1 ppm to 10%, preferably 1099m to 5%, based on the mixed solvent composition.
%, more preferably 1100 pp to 3%.

2) As the compounds, those represented by Ichinoshiro R-No2 (R: a chain or cyclic hydrocarbon group having 1 to 6 carbon atoms and a saturated or unsaturated bond) are preferred, such as nitromethane, nitroethane, 1 It is selected from -21-lopropane, 2-nitropropane, nitrohensen, etc., and nitromethane is more preferable. As for the phenols, those shown by -Noshiro below are preferable, and R'+ (here, R3,lF+, R''+, R'''+ represents 1 or a saturated or unsaturated bond having 1 to 6 carbon atoms). chain or cyclic hydrocarbon group having the following.) Phenol, 0-cresol, m-cresol, p-cresol, thymol, p-tert-butylphenol, tert-butylcatechol, catechol, isoeugenol, ○-methoxyphenol, 4. 4'-dihydroxyphenyl-2,2-propane, isoamyl salicylate, hensyl salicylate, methyl salicylate, 2
．． 6-cresol, monobutyl-p-cresol, and the like. More preferred are phenol and 2,6-di-t-butyl-Y)-cresol.

As the amines, those shown in the following -Noshiro are preferable, R2N (R'212.(R2) 2-N (R'2)
2. (R2) 2-NR'2゜(R2) J R'z
-N-[R”2) 2. R2-R' 2-N11 R
"2゜R2-CIIN (R'212-R"2-N-(
R"' 212° (R2) 2N-R' 2-N+(-
R′2−N−(R″′ 212°(R2) 2N−(R
'2NII) 4-R'2. R2-Nl1R' 2゜(R2) 2-N-0ft" 2 (Here, R2, Tma'2. R2, R"' 2 has a hydrogen atom or a saturated or unsaturated bond having 1 to 10 carbon atoms chain or cyclic hydrocarbon group) pendelamine, hexylamine, diisopropylamine, diisobutylamine, di-n-propylamine,
Diallylamine, triethylamine, N-methylamine, pyridine, vinylicline, morpholine, N-methylmorpholine, triallylamine, allylamine, α-methylhensylamine, methylamine, dimethylamine, trimedelamine, ethylamine, diethylamine, propylamine, isopropylamine , dipropylamine, butylamine, isobutylamine, sec-butylamine, tertiary-butylamine, dibutylamine, tributylamine,
Dibentylamine, tripentylamine, 2-ethylhexylamine, aniline, di-N-dimethylaniline, N
, N-diethylaniline, ethylenediamine, propylenediamine, diethylenetriamine, de]diethylenepentamine, hensylamine, dihensylamine, diphenylamine, diethylhydroxylamine, N-phenyl-1-naphthylamine, dioctylamine, N-methylhenzylamine, etc. It is something. More preferred are diisopropylamine, diallylamine, and diphenylamine.

The needles are preferably those represented by the following general formula: +10-R, -0-R', lo-83-0-R',
-0-R″,, +1O-R3-011° (here, R
3, R'3. R″ is a chain or cyclic hydrocarbon group having saturated or unsaturated bonds having 1 to 10 carbon atoms.) 1.4-dioxane, 1,2-butanediol, isopropyl ether, ethylene glycol monomethyl ether, diethylene glycol dimethyl 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 needle, ethylene glycol diethyl ether, ethylene glycol diphenyl ether, ethylene glycol dimethyl ether, ethylene glycol monophenyl ether, ethylene glycol monobutyl ether, ethylene glycol monopencyl needle, dibenthylconieter, allyl ethyl Ether ethyl ether, diallyl ether, butyl glycidyl ether, allyl glycidyl ether, dipropyl ether, ethyl glycidyl ether, vinyl glycidyl ether, dimethyl needle, diethyl ether, di-normal propyl ether, dibutyl ether, 1,2-dime] xyethane , trimethoxyethane, triethoxyethane, etc. More preferably 1.
These are 2-butanediol, 1,4-dioxane, and 1,2-dimethoxyethane. .

The amines are preferably selected from a-amylene, β-amylene, γ-amylene, α-isoamylene, β-isoamylene, etc., and β-amylene is more preferable.

The Nisdels are preferably those represented by the following general formula: A chain or cyclic hydrocarbon group having an unsaturated bond.) Methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, isobutyl acetate, isopropyl acetate, ethyl acrylate, 2-hydroxyethyl methacrylate, methyl acrylate, They are selected from butyl acrylate, phenyl acrylate, allyl acrylate, caprolactam, ethyl carbamate, methyl carbamate, methyl salicylate, and more preferably megyl acetate. As the self-organized posphites, those represented by the following general formula are preferable, (R,0),,P, (R5-R'
6-0), 11. (R60)2POR'5° (wherein , R', , R5, R'5 is a hydrogen atom or a chain or cyclic hydrocarbon group having 1 to 1 B carbon atoms and having a saturated or unsaturated bond. ) triphenylphosphite, tris(nonylphenyl)
Phosphii, 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, detraphenyl dibrobylene glycol pentaerythritol tetraphosphite,
Trilauryl trithiophosphite) bentaerythritol dibosphite, bis(nonylphenyl) pentaerythritol diphosphite, tridecyl phosphite, distearyl pentaerythritol diphosphite, tris(2,4-di-tert-butylphenyl) It is selected from boss fights, etc. More preferred is triphenyl phosphite.

The epoxides are preferably those represented by the following general formula, R60, XR. 0 (Here, R6 is a chain or cyclic hydrocarbon group having a saturated or unsaturated bond having 1 to 8 carbon atoms. X is a halogen atom.) 1,2-butylene oxide, epichlorohydrin, butylene oxide, 2 , 3-butylene oxide, styrene oxide, etc., and 1.2-butylene oxide is more preferable.

As the furans, those represented by the following general formula are preferable, I/R″7 (where R7, R′7.117 has 1 to 2 carbon atoms
A hydrocarbon group having saturated and/or unsaturated bonds. ) It is selected from tetrahydrofuran, N-methylvirol, 2-methylvirol, 3-methylvirol, etc., and N-methylvirol is more preferred.

As the ketones, those represented by the following general formula are preferable, (R,) 2CO,R8-Co-R', fR8
NGO) 2゜RIl-CON-(R'8) 2. (R
Il) 2NCON (R” I) 2゜(Here l'
t,, ,R',, R,,,R' [1 is a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms and having a saturated or unsaturated bond. ) Acetin, methyl ethyl ketone, methyl isobutyl ketone, azodicarbonamide, maleic acid hydrazide, phthalic acid hydrazine, form 1, N-methylpolamide, N, N-dimethylpolamide, N, N
-diethylformamide, N-methylpropionamide, 2-pyrrolidone, N, N, N', N'-butramethylurea, N-methylpyrrolidone, etc., and methyl ethyl ketone is more preferred.

The triazoles are preferably those represented by the following general formula, Ra-N5-R'9. R9-N5-R' 9-Ko.

R″9 X-R9-N, -R′9-R”9. Rq-N3-R
'9-N-R"gR"9 (here, R9, R'9.11"9. R"'9 is a hydrogen atom or a chain or cyclic carbonized chain having a saturated or unsaturated bond having 1 to 16 carbon atoms) Hydrogen group.
゛ -tert-butyl-5'-methylphenyl)-
5-chloro-hencitriazole, 1,2.3-hencitriazole, 1-[(N,N-bis-2-ethylhexyl)aminomethyl]hencitriazole, etc., more preferably 1,2. 3-Henzo [・
It is Riazole.

The mixed solvent composition of the present invention can be used in the same various applications as conventional solvents, and is particularly advantageous in that it has less influence on plastics than conventional solvents alone.

Specific uses of the mixed solvent composition of the present invention include fluxes, greases, oils, waxes, abrasives, ink removers, paint solvents, drawing agents, stain removers, ceramics, plastics, rubber, metals, etc. Examples of solvents for cleaning and try-cleaning various manufactured articles include cleaning agents and draining agents for IC parts, electrical equipment, precision instruments, optical lenses, and the like. As a cleaning method, hand wiping, dipping, spray shaking, ultrasonic cleaning, steam cleaning, etc. may be employed.

[Examples] Examples 1 to 5, Comparative Example 1 A flux cleaning test was conducted using the mixed solvent compositions shown in Table 1.

Flux (Sparkle Flux PO-F-309, Senju Metal Co., Ltd.) was applied to the entire surface of the printed circuit board (copper-clad laminate), baked in an electric furnace at 200°C for 1 minute, and then immersed in a mixed solvent composition for 1 minute. Table 1 shows the degree of flux removal.

Table 1 () shows the mixture ratio [wt%] ○: Good removal △: Small amount remaining Measurements were made.

A predetermined amount of each composition was placed in a sample cup of a Pensky-Martens flash point meter, and the flash point was measured according to the conditions specified in JIS-2265. The results are shown in Table 2. 1-0 Table 2 () indicates the mixing ratio [wt%] [Effects of the Invention] As is clear from the examples, the mixed solvent composition of the present invention has
It has excellent cleaning effects. In addition, since it has a moderate dissolving power similar to conventionally used hydrocarbons, alcohols, esters, etc., it does not have any adverse effect on composite parts made of metals, plastics, and elastomers.
Flux etc. can be cleaned.

Furthermore, as is clear from the Examples, since a composition with no flash point can be obtained, it is particularly advantageous from a safety standpoint in heating immersion cleaning, steam cleaning, etc.

Claims (1)

[Claims] 1. A mixed solvent composition consisting of trichlorotrifluoroethane, cyclohexane and dichlorotrifluoroethane.