JPH01318093A - Mixed solvent composition - Google Patents

Abstract

PURPOSE:To obtain the title composition which is noncombustible or difficultly 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 isopropyl acetate, n-butanol, methyl ethyl ketone and specified hydrocarbons with trichlorotrifluoroethane. CONSTITUTION:At least one member selected from among isopropyl acetate, n-butanol, methyl ethyl ketone, n-pentene, 2-methylbutane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane and 2,3-dimethylbutane is mixed with trichlorotrifluoroethane in such amounts that the mixing ratio of each of these components to the trichlorotrifluoroethane is desirably 1-50wt.%.

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, dry cleaning, etc.

[Prior art] Hydrocarbons, alcohols, ketones, and esters are
There are many types, 71! Various substances with different boiling points are easily available and are widely used as cleaning solvents for oils and fats, fluxes, IC parts, precision machinery parts, dry cleaning, etc.

[Problems to be solved by the invention] Hydrocarbons, alcohols, ketones, and esters have excellent performance as solvents, but they are all flammable and dangerous in storage and use. It is.

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 isopropyl acetate, n-butanol, methyl ethyl ketone, n-pentane, 2-methylbutane, 2-methylpentane, 3-methylpentane, 2.2-dimethylbutane, and 2.3 - A mixed solvent composition comprising at least one member selected from the group of dimethylbutane and trichlorotrifluoroethane.

The composition of the present invention is non-flammable or flame-retardant, and has detergency equal to or higher than that of conventional hydrocarbons, alcohols, ketones, 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 (RI13 and/or RII3a).

Isopropyl acetate, n-butanol, methyl ethyl ketone, n-pentane, 2-methylbutane in the present invention,
The mixing ratio of each of 2-methylpentane, 3-methylpentane, 2.2-dimethylbutane, and 2.3-dimethylbutane to trichlorotrifluoroethane is 1 to 50I.
TBa%, preferably 3 to 45% by weight, more preferably 5 to 35% by weight.

The mixed solvent composition of the present invention may contain other fluorinated solvents such as dolchloromonofluoromethane [RIll], trichlorodifluoroethane (R122°R122a, R
122b), dichlorotrifluoroethane (RI23. At least one of R123a and R123b), trichlorofluoroethane (R131°R
I31a, at least one of RI31b), dichlorodifluoroethane fR132, R132a, R132b
, RI32c), chlorotrifluoroethane (RI33. At least one of R133a, R133b), dichlorofluoroethane (R141, R133b),
I41a, at least 1a of RI41b), chlorodifluoroethane (Rl 42. Rl 42a, RI
42b), chlorofluoroethane (
At least one of R151 and R151a) and difluoroethane (at least one of RI52 and R152a) 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, amyrezis, 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 I ppm-10%, preferably 10 ppm to 10%, based on the mixed solvent composition.
5%, more preferably 10 (lppm-3%).

As the nitro compounds, those represented by R-NO□ (R: a chain or cyclic hydrocarbon group having 1 to 6 carbon atoms and a saturated or unsaturated bond) are preferred, including nitromethane, nitroethane, 1 -Nitropropane, 2-nitropropane, nitrobenzene, etc., and nitromethane is more preferred. As the phenols, those shown in the following - machining allowance are preferred, R'.

(Here, R,, R',, R''1.R''1 is 011 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-butyl-p-cresol.

As the amines, those shown by the following - machining allowance are preferable, Rz-N fR' -1a, (R2) x-N (
R'al 2+ (R2) 2-NR' 2゜(L)
2N-R'x-N-fR''*) a, Rz-R'
a-Nll-R'a.

R--CIIN (R' x) 2-R''--N-(R
”' 212°(R2) 2N-R' a-Nll-R
"2-N-(R"' 2) 2゜fR21-N-(R'
2N11) 4-R"z, R-Nll-R'!.

fL) 2-N-OR″2 (where R2, R′2+ R″a, R″′ x is a hydrogen source r or a chain or cyclic carbonized carbon having saturated or unsaturated bonds having 1 to 10 carbon atoms Hydrogen group) Pentylamine, hexylamine, diisopropylamine, diisobutylamine, di-n-propylamine,
Diallylamine, triethylamine, N-methylaniline, pyridine, picoline, morpholine, N-methylmorpholine, triallylamine, allylamine, α-methylbenzylamine, methylamine, dimethylamine, trimedelamine, ethylamine, diethylamine, propylamine, isopropylamine , dipropylamine, butylamine, isobutylamine, sec-butylamine, tertiary-butylamine, dibutylamine, tributylamine,
Dibenzylamine, tripentylamine, 2-ethylhexylamine, aniline, N,N-diethylaniline,
From N,N-diethylaniline, ethylenediamine, propylenediamine, diethylenetriamine, tetraethylenepentamine, benzylamine, dibenzylamine, diphenylamine, diethylhydroxylamine, N-phenyl-1-naphthylamine, dioctylamine, N-methylbenzylamine, etc. It is chosen. More preferred are diisopropylamine, diallylamine, and diphenylamine.

The ethers are preferably those represented by the following general formula: +1O-Rs-0-R', +10-R, -0-R'
, -0-R",, +10-R, -OH.

(Here, Rs, R's, R"s have 1 to 1 carbon atoms.
A chain or cyclic hydrocarbon group having 0 saturated or unsaturated bonds. ) 1.4-dioxane, 1.2-butanediol, isopropyl ether, ethylene glycol methyl ether, diethylene glycol methyl ether, diethylene glycol monoethyl ether, dipropylene glycol methyl ether, ethyl naphthyl 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 diethyl ether, ethylene glycol monobenzyl ether, diallyl ether, allyl ethyl ether, diisopentyl ether, diallyl ether, butyl glycidyl ether,
It is selected from allyl glycidyl ether, dipropyl ether, ethyl glycidyl ether, vinyl glycidyl ether, dimethyl ether, diethyl ether, di-normal propyl ether, dibutyl ether, 1,2-dimethoxyethane, trimethoxyethane, triethoxyethane, etc. . More preferred are 1,2-butanediol, 1,4-dioxane, and 1,2-dimethoxyethane.

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

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

(Here, R4, R', and R''4 are hydrogen atoms or chain or cyclic hydrocarbon groups having 1 to 6 carbon atoms and having a saturated or unsaturated bond.) Methyl acetate, ethyl acetate, propyl acetate, acetic acid Normal butyl, isobutyl acetate, isopropyl acetate, ethyl acrylate, 2-hydroxyethyl methacrylate, methyl acrylate, butyl acrylate, phenyl acrylate, allyl acrylate, caprolactam, ethyl carbamate, methyl carbamate, methyl salicylate, etc. methyl acetate is more preferred.

As the organic phosphites, those represented by the following general formula are preferable, (860) 3P, (R6-R'
6-0) 3P, (Rho) zPOR' 11+
(Here, R,, R',, 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.) 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 dibrobylene glycol bentaerythritol tetraphosphite, trilauryl trithiophosphite, bis(tridecyl)
One selected from pentaerythritol diphosphite, bis(nonylphenyl)pentaerythritol diphosphite, tristearyl phosphite, distearyl pentaerythritol diphosphite, tris(2,4-di-tert-butylphenyl) phosphite, etc. It is. More preferred is triphenyl phosphite.

As the epoxides, those represented by the following general formula are preferable, R-0, is a halogen atom.

) It is selected from 1.2-butylene oxide, epichlorohydrin, propylene oxide, 2,3-styrene 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'7.R'7 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-methylvirol is more preferred.

The ketone neck is preferably one represented by the following general formula, fR81zco, Ra-C0-R' ll+ (
RN(:01 a.

R8-C0N-(R'a)a, (R,), NC0N
(R',),.

(Here, R, , R', , R "8. R'" 8 is a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms and having a saturated or unsaturated bond.) Acetone, methyl ethyl ketone, methyl isobutyl ketone, azodicarbonate Amide, maleic hydrazide, phthalic hydrazine, formamide, N-methylformamide, N,N-dimethylformamide, N,N-diethylformamide, N-methylpropionamide, 2-pyrrolidone, N, N, N', N' -tetramethylurea,
It is selected from N-methylpyrrolidone and the like, and methyl ethyl ketone is more preferred.

The triazoles are preferably those represented by the following general formula, X-R9-N, -R', -R'', R, -N, -R
', -N-R''.

R”’.

(Here, R1, R', R#, R''' are hydrogen atoms or chain or cyclic hydrocarbon groups having 1 to 16 carbon atoms and having a saturated or unsaturated bond. X is a halogen atom.) 2 -(2°-hydroxy-5'-methyl-phenyl)benzotriazole, 2-(2°-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chloro-benzotriazole, 1,2.3 -benzotriazole, 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 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, 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 27. Comparative Examples 1 to 9 Flux cleaning tests were conducted using the mixed solvent compositions shown in Tables 1 and 2.

Flux (Sparkle Flux PO-F-309, manufactured by Senju Metals) was applied to the entire surface of the printed circuit board (copper-clad laminate), and after firing for 1 minute in an electric furnace at 200°C, it was immersed in a mixed solvent composition for 1 minute. The degree of flux removal is shown in Tables 1 and 2.

Table 1 ○: Can be removed well △: Small amount remaining ×: Considerable remaining Table 2 () shows the mixing ratio (% by weight) ○: Good removal △: Small amount remaining ×: Considerable remaining Examples 28 to 35, Comparative Examples jO-17 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-42265. 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, like conventionally used hydrocarbons, alcohols, ketones, esters, etc., it has moderate dissolving power, so it can be used as a flux without adversely affecting composite parts made of metals, plastics, and elastomers. etc. can be washed. 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. At least one member selected from the group of isopropyl acetate, n-butanol, methyl ethyl ketone, n-pentane, 2-methylbutane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane. A mixed solvent composition consisting of trichlorotrifluoroethane.