JPH02203000A - Mixed solvent composition - Google Patents

Abstract

PURPOSE:To obtain the title composition used as an R-113 substitute and excellent in the cleaning effect for oil or fat by using a specified 3C chlorofluorohydrocarbon and a chlorinated hydrocarbon as constituents. CONSTITUTION:The title composition consists of at least one of 3C chlorofluorohydrocarbons, i.e. CClF2CF2CHCl2, CCl2FCF2CHClF, CF3CF2CHCl2, CClF2CF2CHClF, CClF2CF2CH2Cl, CHF2CF2CHClF, CH3CF2CCl2F, CHF2CF2CH2 Cl, CH2ClCF2CH2Cl, CHCl2CF2CH3, CH3CF2CH2Cl, CHF2CF2CCl2F, CHClFCF2 CHClF, CHF2CF2CHCl2, CH2FCF2CCl2F, CF3CF2CH2Cl, CClF2CF2CH2F, CH2 ClCF2CHClF, CH2FCF2CHCl2, CH2FCF2CHClF, CClF2CF2CH3, CH2FCF2CH2Cl, and CH3CF2CHClF, and a chlorinated hydrocarbon (e.g. trichloroethylene).

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a mixed solvent composition used in a degreasing detergent, etc., used to remove oils adhering to metal parts processed using a metal processing oil. It is related to.

[Prior Art] Cutting oils are used in the cutting process of precision mechanical parts, electrical parts, etc., but in many cases, products cannot be manufactured if these oils remain attached. Therefore, in the finishing process of such parts, organic solvents are usually used for cleaning. As an organic solvent, it has various advantages as listed below: 1.
1,2-Trichloro-1,2,2-trifluoroethane (hereinafter referred to as R113) is widely used.

R113 is nonflammable, egg-weighted, has low toxicity, and has excellent stability. Moreover, it has the property of selectively dissolving various stains without attacking base materials such as metals, plastics, and elastomers. In general, many of the items to be washed are composite parts made of metals, plastics, elastomers, etc. Therefore, from this point of view, R11,
3 was advantageous.

[Problems to be Solved by the Invention] The present invention proposes that although conventionally used R113 has various advantages, it is suspected that it destroys ozone in the stratosphere and may even cause skin cancer. Therefore, it is an object of the present invention to provide a new mixed solvent composition that has various advantages similar to R113 and can perform equivalent cleaning.

[Means for Solving the Problems] The present invention has been made to achieve the above-mentioned objects, and
A mixed solvent composition comprising a specific chlorofluorinated hydrocarbon having 3 carbon atoms and chlorinated hydrocarbons is provided.

The chlorofluorinated hydrocarbons of the present invention include CCQFzCF*CHC2a (R224ca),
CCl2aFCFaCHC(2F* (R224cb)
, CFsCF*CHCQt (R225ca) , C
CQFaCF*CHCl2F (R225cb), CC
l2F2CFaCHaCQ (R234cc), CH
F*CFzCHCQF (R235ca), CH, CF
zCC<! aF (R243cc), CHF5CF, CI
(*C(2, (R244ca), CH,C(2CF*C
H,C(! (R252cb), CHC(2,CF
*CH,, (R262ca), CHsCFtCHtC(
1 (R225CC), Cl4FtCFICC (2tF(
R234CC), C) ltJFcFi(JC12F (
R234ca), CHFzCFzCHC'; hQ
(R234cb), RiH, FCFaCC12aF (R2
34cd), CFsCF, CHaCf2(R235cb
), CC2F, +CF, CH, F (r1235cc),
C) IICf2CFICHCQF (R243Ca), C
HHFCFzCHC12* (R243cb), C
H,FCF2CHCQF (R244C1:l).

CCQFzCFmCHa (R244cc), CH
JCFzCHzCQ (R253ca), and CHsC
One type or a mixture of two or more types selected from hydrogen-containing chlorofluorinated hydrocarbons such as FxCHCI2F (R253cb) is preferred.

The mixed solvent composition of the present invention can contain various other components depending on various purposes. For example, in order to increase the dissolving power, at least one kind selected from organic solvents such as hydrocarbons, alcohols, ketones, or esters can be included. The content of these organic solvents in the mixed solvent composition is 0 to 50% by weight, preferably 10 to 40% by weight, and more preferably 20 to 30% by weight. When the mixed solvent composition of the present invention has an azeotropic composition, it is preferably used in that azeotropic composition.

The chlorinated hydrocarbons are preferably saturated or unsaturated chlorinated hydrocarbons having 1 to 2 carbon atoms, such as methylene chloride, carbon tetrachloride, 1,1-dichloroethane, 1,2-dichloroethane, 1,1. 1-triclo, leethane, 11.2-
Trichloroethane, 1,1,1.2-tetrachloroethane, 1,1,2.2-tetrachloroethane, pentachloroethane, 1.1-dichloroethylene, 1.2-dichloroethylene, trichlorethylene, It is selected from tetrachlorethylene and the like. More preferred are methylene chloride, 1.1.1-trichloroethane, trichlorethylene, tetrachlorethylene and the like.

The hydrocarbons are preferably linear or cyclic saturated or unsaturated hydrocarbons having 1 to 15 carbon atoms, such as n-pentane, impentane, n-hexane, isohexane, 2-methylpentane, 2,2-dimethylbutane. , 2,3-dimethylbutane, n-hebutane, isohebutane, 3-methylhexane, 2,4-dimethylpentane, n-octane, 2
-Methylhebutane, 3-methylhebutane, 4-methylhebutane, 2.2-dimethylhexane, 2.5-dimethylhexane, 3.3-dimethylhexane, 2-methyl-3
-Nitylbencune, 3-methyl-3-nitylbencune,
2.3.3-trimethylpentane, 2,3.4-trimethylpentane, 2,2.3-trimethylpentane, isooctane, nonane, 2,2.5-trimethylhexane,
Decane, dodencane, 1-pentene, 2-pentene, l
-hexene, 1-octene, 1-nonene, 1-decene,
It is selected from cyclobencune, methylcyclopentane, cyclohexane, methylcyclohexane, ethylcyclohexane, bicyclohexane, cyclohexene, α-pinene, dipentene, decalin, tetralin, amidino, amylnaphthalene, and the like. More preferably n-
These include benkune, n-hexane, cyclohata, xane, and n-hebutane.

The alcohols are preferably linear or cyclic saturated or unsaturated alcohols having 1 to 17 carbon atoms, such as methanol, ethanol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, 5ec-butyl alcohol, isobutyl alcohol, tert-butyl alcohol, pentyl alcohol, 5ec-amyl alcohol, l-ethyl-1-propatol, 2-methyl-1
-butanol, isopentyl alcohol, tart-pentyl alcohol, 3-methyl-2-butanol, neopentyl alcohol, 1-hexanol, 2-methyl-
1-pentanol, 4-methyl-2-pentanol, 2
-ethyl-1-butanol, 1-heptatool, 2-heptatool, 3-heptatool, 1-octatool, 2
-octatool, 2-ethyl-1-hexanol, 1-
Nonanol, 3,5.5-trimethyl-1-hexanol, 1-decanol, 1-undecanol, l-dodecanol, allyl alcohol, propargyl alcohol,
Benzyl alcohol, cyclohexanol, 1-methylcyclohexanol, 2-methylcyclohexanol,
3-methylcyclohexanol, 4-methylcyclohexanol, α-terpineol, atonitinol, 2,
It is selected from 6-dimethyl-4-heptatool, trimethylnonyl alcohol, tetradecyl alcohol, heptadecyl alcohol, and the like. More preferred are methanol, ethanol, isopropyl alcohol and the like.

, as rockettones, R-CQ-R, R-CO, R-CO
-R'-Saturated or unsaturated hydrocarbon group having 1 to 9 carbon atoms) Those represented by the following formulas are preferred: acetone, methyl ethyl ketone, 2-pentanone, 3-pentanone, 2-hexanone, methyl-n -butyl ketone, methyl butyl ketone, 2-heptanone, 4-heptanone, diisobutyl ketone, acetonylacetone, mesityl oxide, holon, methyl-〇-amyl ketone, ethyl butyl ketone, methylhexyl ketone, cyclohexanone,
It is selected from methylcyclohexanone, isophorone, 2,4-pentanedione, diacetone alcohol, acetophenone, fencheon, and the like. More preferred are acetone, methyl ethyl ketone and the like.

The esters are preferably those represented by the following general formula, R, -COO-R,, R, -CnieR3-Coo
-R,.

OR.

0OR4 (wherein R,, R2, R,, R4, R,, Re is H or O) or a hydrocarbon group having 1 to 19 carbon atoms and having a saturated or unsaturated bond. ) Specifically, methyl formate, ethyl formate, propyl formate,
Butyl formate, isobutyl formate, pentyl formate, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, 5ec-butyl acetate, pentyl acetate, impentyl acetate, 3-methoxybutyl acetate, 5ec-hexyl acetate, 2-ethyl butyl acetate, 2-ethylhexyl acetate, cyclohexyl acetate, benzyl acetate, methyl propionate, ethyl propionate, butyl propionate, inpentyl propionate, methyl butyrate, ethyl butyrate, butyl butyrate, isopentyl butyrate, isobutyl isobutyrate, 2-hydroxy-2
- Ethyl methylpropionate, butyl stearate, pentyl stearate, methyl benzoate, ethyl benzoate, propyl benzoate, butyl benzoate, isopentyl benzoate, benzyl benzoate, ethyl abietate, benzyl abietate, bis adipate - 2-ethylhexyl, γ-butyrolac I, diethyl oxalate, dibutyl oxalate, dibentyl oxalate, diethyl malonate, dimethyl maleate, diethyl maleate, dibutyl maleate, dibutyl tartrate, tributyl citrate, dibutyl sebacate, sebacin bis-2-ethylhexyl acid,
Some are selected from dimethyl phthalate, diethyl phthalate, dibutyl phthalate, bis-2-ethylhexyl phthalate, dioctyl phthalate, and the like. More preferred are methyl acetate, ethyl acetate and the like.

The mixed solvent composition of the present invention may further contain various cleaning aids, stabilizers, or hydrogen-containing chlorinated fluorinated hydrocarbons that have little effect on ozone destruction. As a cleaning method, conventional methods such as hand wiping, dipping, spraying, shaking, ultrasonic cleaning, and steam cleaning can be used.

[Examples] Examples 1 to 23 Cutting oil cleaning tests were conducted using the mixed solvent compositions shown in Table 1 below.

5O3-304 test piece (25mmX 30mm
After immersing a test piece (2 mm thick) in spindle oil and then immersing it in a degreasing detergent for 5 minutes, the remaining state of spindle oil on the surface of the test piece was taken out and visually observed. The results are shown in Table 1.

[Effects of the Invention] As is clear from the Examples, the mixed solvent composition of the present invention has an excellent cleaning effect on oils and fats.

In addition, like R113, which has been used conventionally, it has an appropriate dissolving power, so it can degrease and clean composite parts made of metals, plastics, elastomers, etc. without adversely affecting them.

Claims (1)

[Claims] (1) ▲There are mathematical formulas, chemical formulas, tables, etc.▼FCFF_ A mixed solvent composition consisting of at least one member selected from the group of 3CH_2Cl and CH_2CF_2CHClF and chlorinated hydrocarbons.