JPH01318092A - Mixed solvent composition - Google Patents

Abstract

PURPOSE:To obtain the title composition which is noncombustible or difficulty combustible, has an excellent cleaning effect and is useful as a remover for flux, grease, etc., a cleaner for IC components, etc., or the like by blending at least one member selected from among methyl acetate, isopropyl acetate, n-hexane and cyclohexane with methanol and trichlorotrifluoroethane. CONSTITUTION:At least one member selected from among methyl acetate, isopropyl acetate, n-hexane and cyclohexane and methanol are used in a ratio of, desirably, an azeotropic mixture, and this mixture is mixed with trichlorotrifluoroethane in such amounts that the mixing ratio of each mixture or each of the above five components to the trichlorotrifluoroethane is desirably 1-50wt.% (e.g., a mixture of 70wt.% of trichlorotrifluoroethane with 30wt.% of a methyl acetate-methanol azeotrope mixture).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel mixed solvent composition having excellent properties as a cleaning solvent for oils and fats, fluxes, IC parts, dry cleaning, etc.

[Prior art] There are many types of hydrocarbons, alcohols, and esters, and various substances with five different standard boiling points are easily available, and are useful for cleaning oils and fats, fluxes, IC parts, precision machine parts, dry cleaning, etc. Widely used as a solvent.

[Problem to be Solved by the Invention 1 Hydrocarbons, alcohols, and esters have excellent performance as solvents, but they are all flammable and pose risks 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 provides at least one of methyl acetate, isopropyl acetate, n-hexane and cyclohexane, methanol and trichlorotrifluoroethane (RI+3 and/or R
ll3a).

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

Although the hydrocarbons, alcohols, and esters used in the present invention are flammable, they can be made nonflammable or flame retardant by adding nonflammable dolchlorotrifluoroethane.

Methyl acetate and methanol used in the present invention have an azeotropic composition (methyl acetate/methanol = ai, 3/18.7, weight%)% n-hexane and methanol have an azeotropic composition (n-
Hexane/methanol = 73.1/26.9, fff
m%), cyclohexane and methanol are an azeotropic composition (
Cyclohexane/methanol = 63/37, width: 4%)
, isopropyl acetate and methanol are preferably used in an azeotropic composition (isopropyl acetate/methanol: 29.8/70.2, weight %).

The mixing ratio of each of the azeotropic compositions or cyclohexane, n-hexane, isopropyl acetate, methyl acetate, and methanol to trichlorotrifluoroethane is 1 to 1.
The amount is 50% by weight, preferably 3-45% by weight, more preferably 5-35% by weight.

The mixed solvent composition of the present invention contains other fluorinated solvents 5 such as dolchloromonofluoromethane (R11), dolchlorodifluoromethane (RI22°R122a, RI
22b), dichlorotrifluoroethane fRI23. At least one of R123a and old 23b
species), trichlorofluoroethane (Rl 31 ).

At least one of RI31a, R131b), dichlorodifluoroethane (RI32. RI32a, RI3
2b, R132c), chlorotrifluoroethane (RI33. R133a, RI33b)
at least one of the following), dichlorofluoroethane (RI4
1. at least one of RI41a and R141b),
Chlorodifluoroethane (RI42. RI42a,
At least one of RI42b), chlorofluoroethane (at least one of R151, RI5]a), difluoroethane (at least one of R152, R152a), etc. can be used in combination.

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 II) l) Il+-10% 5 preferably 10p to the mixed solvent composition
pm to 5%, more preferably 100 ppm to 3%.

As the nitro compounds, those represented by R-No2 (R: a chain or cyclic hydrocarbon group having 1 to 6 carbon atoms and a saturated or unsaturated bond) are preferred, including nitromethane, nitroethane, l-nitropropane. , 2-nitropropane, nitroenyan, etc., and nitromethane is more preferable. As phenols, those shown by the following - machining allowance are preferable, R'+ (where R+, R'+, R"+, R-r are old (
Or a chain or cyclic hydrocarbon group having 1 to 6 carbon atoms and having a saturated or unsaturated bond. ) Phenol, 0-cresol, m-cresol, p-cresol, thymol, p-tert-butylphenol, tert-butylcatechol, catechol, isoeugenol, 0-methoxyphenol, 4,4'-dihydroxyphenyl-2,2- Propane, isoamyl salicylate, benzyl salicylate, methyl salicylate, 2
．． It is selected from 6-di-t-butyl-p-cresol and the like. More preferred are phenol and 2,6-di-t-butyl-p-cresol.

As the amines, those shown by the following - machining allowance are preferable, R, -N fR''z) 2. (Ral 2-N fR
'z)! + (Ra)-NR” 2゜[R2)
2N-R', -N-fR'',) 2. R, -R',
-NIIR″2゜R2-CHN (R'-) 2-RZ
-N-(R'"2)2゜(R21aN-R'2-N1
1-R'2-N-fR''' al 2゜(Ll 2N-
(R”-Nil) 4-R#2. Ra-N11-R
'x.

(R2) 2-N-OR+ 2 (here, R2, R', R"2. Hydrogen group) 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, Propylamine, butylamine, isobutylamine, sec-butylamine, tertiary-butylamine, dibutylamine, tributylamine,
Dibenzylamine, tripentylamine, 2-ethylhexylamine, aniline, N,N-dimethylaniline,
From N,N-diethylaniline, ethylenediamine, propylenediamine, diethylenetriamine, tetraethylenepentamine, pencilamine, dibenzylamine, diphenylamine, diethylhydroxylamine, N-phenyl-1-naphthylamine, dioctylamine, N-methylbenzylamine, etc. It is chosen. More preferred are diisopropylamine, diallylamine, and diphenylamine.

As the ethers, those represented by the following general formula are preferred.

! 4O-R3-0-R'3.110-R, -0-R'3
-0-R"8. II O-Rs ~ 011° (here,
R3, R'3. R'3 is a chain or cyclic hydrocarbon group having 1 to 10 carbon atoms and having a saturated or unsaturated bond. ) 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, diallyl ether, allyl ethyl ether, diiso Pentyl ether, diallyl ether, butyl glycidyl ether, allyl glycidyl ether, dipropyl ether,
It is selected from ethyl glycidyl ether, vinyl glycidyl ether, diallyl ether, diethyl ether, di-normal propyl ether, dibutyl ether, 1,2-dimethoxyethane, trimethoxyethane, triethoxyethane and the like. More preferred are 1,2-butanediol, 1,4-dioxane, and 1,2-dimethoxyethane.

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

The esters are preferably those represented by the following general formula: R40-R', -CDOII''.

(Here, R,, r<'4. R''4 is a hydrogen atom or a chain or cyclic hydrocarbon group having 1 to 6 carbon atoms and having a saturated or unsaturated bond.) Methyl acetate, ethyl acetate, propyl acetate , n-butyl acetate, isobutyl acetate, isopropyl acetate, ethyl acrylate, 2-hydroxyethyl methacrylate, methyl acrylate, butyl acrylate, phenyl acrylate, allyl acrylate, caprolactam, ethyl carbamate, methyl carbamate, salicylic acid It is selected from methyl, etc., and methyl acetate is more preferable.

The organic phosphites are preferably those represented by the following general formula, (Rso)ap, fR6-R', -
0), P, (RsO)zPOR”s.

(Here, RS, R's, R'', R'''6 is a hydrogen atom or a chain or cyclic hydrocarbon group having 1 to 18 carbon atoms and having a saturated or unsaturated bond.) Triphenylphosphite, Tris (nonylphenyl)
Phosphite, triethyl phosphite, tris(2-
ethylhexyl) phosphite, tridecyl phosphite, tributyl phosphite, diphenyl mono(2-ethylhexyl) phosphite, diphenylmo7nodecyl phosphite, diphenyl monotridecyl phosphite, dilauryl hydrogen phosphite, diphenyl hydrogen phosphite, tetra Phenyl dibrobylene glycol bentaerythritol tetraphosphite,
Trilauryltrithiophosphite, bis(tridecyl)pentaerythritol diphosphite, bis(nonylphenyl)pentaerythritol diphosphite, tristearyl phosphite, distearyl pentaerythritol diphosphite, tris(2,4-di-tertiary) butylphenyl) phosphite, etc. More preferred is triphenyl phosphite.

The epoxides are preferably those represented by the following general formula: R,tO,XR,0 (where R6 is a chain or cyclic hydrocarbon group having 1 to 8 carbon atoms and having a saturated or unsaturated bond) .X is a halogen atom.

) It is selected from 1.2-butylene oxide, epichlorohydrin, propylene 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, (where R?, R''=, R-1 is a hydrocarbon group having 1 to 2 carbon atoms and having saturated and/or unsaturated bonds.) It is selected from tetrahydrofuran, N-methylvirol, 2-methylvirol, 3-methylvirol, etc., and N-medelvirol is more preferred.

As the ketones, those represented by the following general formula are preferred.

(Rat 2CO, Rs-Co-R'a, (R, NGO
) 2゜Ra-C0N-(R'812. (8812
NCON (R' 812° (where n, , r; +
',,rt'',,r'8 is hydrogen atom or carbon number 1
A hydrocarbon group having ~4 saturated or unsaturated bonds. ) Acetone, methyl ethyl ketone, methyl isobutyl ketone, azodicarbonamide, maleic hydrazide, phthalic hydrazine, formamide, N-methylformamide, N,N-dimethylformamide, N,N-diethylformamide, N-methylpropionamide, 2- pyrrolidone, N, N, N', N'-tetramethylurea, N-methylpyrrolidone, etc.,
More preferred is methyl ethyl ketone.

The triazoles are preferably those represented by the following general formula, R, -N, -R'9. R, -N, -R', -0)1
゜R'9 X-Tl5-N5-R", -R"9. R9-Nn
-R'9-N-R".

R"'9 (where R,, R',, R",, R"'9 is a hydrogen atom or a chain or cyclic hydrocarbon group having 1 to 16 carbon atoms and having a saturated or unsaturated bond. halogen atom.) 2-(2“-hydroxy-5′-methyl-phenyl)
Benzotriazole, 2-(2°-hydroxy-3”-
Tertiary-butyl-5°-methylphenyl)-5-chloro-benzotriazole, 1.2.3-hensitriazole, 1-[(N,N-bis-2-ethylhexyl)
[aminomethyl]benzotriazole, etc., and 1,2.3-benzotriazole is more preferable.

The mixed solvent composition of the present invention can be used in a variety of applications similar to conventional solvents, and is particularly advantageous in that it imparts less fi/Ill to 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, extractants, stain removers, ceramics, plastics, rubber, and metals. Examples of solvents for cleaning and dry cleaning various 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.

[Example] Examples 1 to 12. Comparative Examples 1 to 4 Flux cleaning tests were conducted using the mixed solvent compositions shown in Tables 1 and 2.

A printed circuit board (8-layer laminate) was coated with flux (Sparkle Flux PO-F-309, manufactured by Senju Metals), fired for 1 minute in an electric furnace at 200°C, and then immersed in a mixed solvent composition for 1 minute. . The degree of flux removal is shown in Tables 1 and 2.

The values in Table 1 () are the mixing ratio [wt%] ○: Good removal △: Small amount remaining ×: Fairly remaining Table 2 (): Mixing ratio [wt%] ○: Good removal △: Small amount remaining ×: Significant residual Examples 13 to 16, Comparative Examples 5 to 8 Flash points were measured using the mixed solvent compositions shown in Table 3.

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 3.

Table 3 () shows the mixing ratio [wt%] [Effects of the invention] As is clear from the examples, the mixed solvent composition of the present invention has the following properties:
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 fifth example, 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 comprising at least one of methyl acetate, isopropyl acetate, n-hexane, and cyclohexane, methanol, and trichlorotrifluoroethane.