JPH01136979A - Degreasing and cleaning agent - Google Patents

Abstract

PURPOSE:To produce the above degreasing and cleaning agent capable of efficiently cleaning the grease on worked metallic parts, etc., by using the azeotropic composition consisting of 1,1,2-trichloro-2,2-difluoroethane and 1,2- dichloro-1-fluoroethane as the effective components of the agent. CONSTITUTION:The degreasing and cleaning agent is prepared by using the azeotropic composition consisting of one kind between 1,1,2-trichloro-2,2- difluoroethane (R122) and tetrachloro-1,2-difluoroethane (R112) and 1,2-dichloro-1- fluoroethane (R141) as the effective components of the agent. At this time, the ratio R112/R141 is controlled to about 66/34 and the ratio R112/R141 to about 17/83(wt.%), and further about 0-50wt.% of at least one kind selected from hydrocarbons (n-pentane, etc.), alcohols (methanol, etc.), chlorinated hydrocarbons (methylene chloride, etc.), and esters (methyl acetate, etc.) is incorporated in accordance with the purposes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a degreasing detergent used for removing oils adhering to metal parts processed using a metal working oil.

[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 to them. Therefore, in the finishing process of such parts, organic solvents are usually used for cleaning. Part 0
Due to the various advantages listed below as a solvent, 1,1
, 2-trichloro-1,2,2-trifluoroethane (
(hereinafter referred to as R113) is widely used.

R113 is nonflammable, non-exposed, 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, R113
was right-handed.

[Problems to be solved by the invention] The present invention solves the problem that conventionally used R113, although it has various advantages, is suspected of destroying stratospheric ozone and causing skin cancer. Therefore, in order to cope with this, the purpose is to provide a new degreasing detergent that has various advantages similar to R113 and can perform equivalent cleaning.

Means for Solving Problem E] The present invention has been made to achieve the above-mentioned object,
1,1,2-trichloro-2,2-difluoroethane (
(hereinafter referred to as RI22) or tetrachloro-1,2-difluoroethane (hereinafter referred to as R112) and 1,2-
dichloro-1-fluoroethane c (hereinafter referred to as R141)
The purpose of the present invention is to provide a degreasing detergent containing an azeotrope with the following as an active ingredient.

R12/R141 which is an active ingredient of the degreasing detergent of the present invention
- an azeotropic composition of about 66/34 or R112/R141.
The azeotropic composition of about I7/83 (azeotropic ratio is weight %) is an excellent solvent that has the same advantages as conventional R113, such as moderate solvent power. These two types of azeotropic compositions can be used individually or as a mixture thereof.

The degreasing detergent of the present invention can contain various other components depending on various purposes. For example, to increase the dissolving power, hydrocarbons, alcohols, ketones,
At least one organic solvent selected from chlorinated hydrocarbons or esters can be contained. The n content ratio of these 11 solvents in the degreasing detergent is 0 to 50% by weight, preferably 10 to 40% by weight, and more preferably 20 to 30% by weight. When an azeotropic composition exists in the mixture of the azeotropic composition of the present invention and an organic solvent, it is preferable to use the azeotropic composition.

The hydrocarbons are preferably linear or cyclic saturated or unsaturated hydrocarbons having 1 to 15 carbon atoms, such as n-pentane, isopentane, 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-
Polypentane, 3-methyl-3-ethylpentane, 2
, 3.3-) dimethylpentane, 2.3.4-trimethylpentane, 2.2.3-trimethylpentane,
Isooctane, nonane, 2.2.5-trimethylhexane.

Decane, dodencane, I-pentene, 2-pentene, l
-hexene, 1-octene, l-nonene, l-decene,
It is selected from cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, ethylcyclohexane, bicyclohexane, cyclohexene, a-pinene, dipentene, decalin, tetralin, amidino, amylnaphthalene, and the like. More preferably n-
These include pentane, n-hexane, n-hebutane, and the like.

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, L-butyl alcohol, pentyl alcohol, 5ec-amyl alcohol, l-ethyl-l-propanol, 2-methyl-
1-butanol, isopentyl alcohol, terL-
Pentyl alcohol, 3-methyl-2-butanol, neopentyl alcohol, l-hexanol, 2-methyl-1-pentanol, 4-methyl-2-pentanol,
2-ethyl-1-butanol, l-heptatool, 2-
heptatool, 3-heptatool, 1-octanol,
2-octanol, 2-ethyl-1-hexanol, l
-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, a-terpineol, avinitinol.

It is selected from 2,6-dimethyl-4-heptatool, trimethylnonyl alcohol, tetradecyl alcohol, hebutadecyl alcohol, and the like. More preferred are methanol, ethanol, isopropyl alcohol and the like.

Ketones include R-CO-R'', R-Co, R
-CO-R' -r Core Cll1) CO-R", R-CO-R', R-CD-R' (Here, R, R", R" are saturated or unsaturated with 1 to 9 carbon atoms Hydrocarbon groups) are preferably represented by the general formula of acetone, methyl ethyl ketone, 2-pentanone, 3-pentanone, 2-hexanone, methyl-〇-butyl ketone, methyl butyl ketone, 2-heptanone, 4-
Heptanone, diisobutyl ketone, acetonylacetone, mesityl oxide, holone, methyl-n-amyl ketone, ethyl butyl ketone, methylhexyl ketone, cyclohexanone, methylcyclohexanone, isophorone,
It is selected from 2.4-bentanedione, diacetone alcohol, acetophenone, fencheon, and the like.

More preferred are acetone, methyl ethyl ketone and the like.

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, l, l, l-trichloroethane, 1,1,
2-Trichloroethane, l, I, 1,2-tetrachloroethane, 1,1,2.2-tetrachloroethane, pentachloroethane, 1,1-dichloroethylene, l,2
- selected from dichloroethylene, trichlorethylene, tetrachlorethylene, etc. More preferred are methylene chloride, 1,1,1-trichloroethane, trichlorethylene, tetrachloroethylene and the like.

As the ester, C0OR is represented by the following general formula.

(Here, Ra, Rs, R4, Rs, Re are 11 or 011 or a hydrocarbon group having 1 to 19 carbon atoms and having a saturated or unsaturated bond.) Specifically, methyl formate, ethyl formate, formic acid propyl,
Butyl formate, isobutyl formate, pentyl formate, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, 5ec-butyl acetate, pentyl acetate, isopentyl acetate, 3-methoxybutyl acetate, 5ec-hexyl acetate, 2 -Ethyl butyl acetate, 2-ethylhexyl acetate, cyclohexyl acetate, benzyl acetate, methyl propionate, ethyl propionate, butyl propionate, isopentyl propionate, methyl butyrate, ethyl butyrate, butyl butyrate, isopentyl butyrate, isobutyl isoacetate, 2- Hydroxy-2
- Ethyl propionate, 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-butyrolact, diethyl oxalate, dibutyl oxalate, dipendyl oxalate, diethyl malonate, dimethyl maleate, diethyl maleate, dibutyl maleate, dibutyl tartrate, tributyl citrate, dibutyl sebacate, sebacic acid bis-2-ethylhexyl,
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 degreasing detergent of the present invention may further be mixed with various cleaning aids, stabilizers, or hydrogen-containing chlorinated fluorinated hydrocarbons that have little effect on ozone destruction. The cleaning method is with a hand towel.

Ordinary methods such as dipping, spraying, shaking, ultrasonic cleaning, and steam cleaning can be used.

[Examples] Examples 1 to 7 Cutting oil cleaning tests were conducted using degreasing detergents shown in Table 1 below.

5IIS-304 test piece (25mm x 30m
(m x 2 mm thick) was immersed in spindle oil, then immersed in a degreasing detergent for 5 minutes, and then taken out and visually observed to see how much spindle oil remained on the surface of the test piece. The result is the first
Shown in the table.

Table 1 () shows the mixing ratio [wt%] O: Can be removed well Δ: Slightly remaining It has an excellent cleaning effect. 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 (2)

[Claims] (1) 1 of 1,1,2-trichloro-2,2-difluoroethane or tetrachloro-1,2-difluoroethane
A degreasing detergent containing as an active ingredient an azeotropic composition of seeds and 1,2-dichloro-1-fluoroethane. (2) Degreasing detergents contain hydrocarbons, alcohols,
The degreasing detergent according to claim 1, which contains at least one selected from ketones, chlorinated hydrocarbons, and esters.