JP2000336391A - Liquid detergent having good oil-separation and penetration properties - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid detergent composition that has a high mildness to skin as well as excellent detergency and low-temperature properties. SOLUTION: This liquid detergent composition comprises (a) an amine-oxide surfactant, (b) a betaine type amphoteric agent, (c) an ether type nonionic surfactant and (d) an anionic surfactant in which (b)/(a)=2-20, (c)/(d)=2-20, (a)+(b)<=(c).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent used for degreasing cleaning of metals, ceramics, glass, plastics and the like.

[0002]

2. Description of the Related Art Conventionally, as industrial degreasing agents for metals, ceramics, glass, plastics, etc., aqueous detergents such as alkali detergents and non-flammable detergents such as 1,1,1-trichloroethane have been used. Was used. Alkali detergents include surfactants such as anionic surfactants represented by sodium alkylbenzenesulfonate, alkali salts such as sodium carbonate, sodium silicate, sodium borate, sodium phosphate, sodium hydroxide, potassium hydroxide, and tripolyphosphate. A chelating agent such as sodium oxalate, ethylenediaminetetraacetate, nitrilotriacetate, gluconate, and a rust preventive such as benzotriazole, amines, alkanolamines, and sodium nitrite are appropriately blended.

The compounding composition is, for example, a cleaning solution containing a specific surfactant and an alkali builder (Japanese Patent Application Laid-Open No.
However, when this washing liquid is washed by immersion washing, the washing ability is insufficient and the permeability is further deteriorated, so that the washing ability is inferior to a finely structured object to be washed. There is. Also, two specific surfactants,
Detergent containing enzyme and amino alcohol (Patent 258)
No. 1231) is also known, but the enzyme cannot be expected to be effective in degreasing mineral oils, which are the main objects of cleaning of industrial detergents. There is a problem in that the load of the drainage treatment of the rinsing water generated in the step of replacing the attached detergent residue with water, that is, the rinsing water generated in the water rinsing (water rinsing) step is increased. In addition, enzymes are easily denatured at high temperatures and are not suitable for cleaning agents for industrial use that are used for a long period of time. Although a detergent containing a specific surfactant, alkanolamine, and a fatty acid (Japanese Patent Application Laid-Open No. Hei 9-137189) is also known, it is excellent in complete degreasing of a small amount of oil adhering to an object to be washed having a fine structure. However, when the amount of processed oil is large due to poor oil separation properties, there is a problem that the life of the cleaning liquid is short.
In addition, after washing an article having a smooth surface such as an aluminum tube for an OPC (organic photoreceptor), bubbles are generated in the liquid, and a water rinsing step utilizing the physical force, that is, a water rinsing of about the babbling grease is used. There is a problem that repelling is observed and water stains remain after drying.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a low-foaming liquid detergent having excellent degreasing power, oil separation properties, permeability and stability of a stock solution.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that the above problems can be solved by blending a specific nonionic surfactant in a specific ratio, and particularly high Degreasing power, permeability and good oil separation,
The present inventors have found that a cleaning solution having excellent stock solution stability and low foaming property can be obtained, and have completed the present invention.

That is, the composition contains at least one of the following components (A) and at least one of the components (B), and further comprises the components (A) and (B)
The mixing ratio of the components [(A) / (B)] is 0.5 to
It is a detergent stock solution which is in the range of 1.5. (A) a nonionic surfactant represented by the following general formula (1): R ¹ -O- (XO) _a -H (1) (R ¹ is an aliphatic hydrocarbon group having 5 to 20 carbon atoms, a mean 5~12.X in addition molar number, alkylene group having 2 to 4 carbon atoms) (B) a nonionic surfactant R ² over O over (YO) _b over represented by the following general formula (2) is (ZO) _c -H (2) (R ² is an aliphatic hydrocarbon group having 5 to 20 carbon atoms, b is an average addition mole number of 1 to 20, and c is an average addition mole number of 1 to 2
0, Y, and Z are different alkylene groups having 2 to 4 carbon atoms) The nonionic surfactant represented by the above component (A) is obtained by adding an aliphatic higher alcohol having 5 to 20 carbon atoms to an aliphatic higher alcohol having 2 to 2 carbon atoms. And the nonionic surfactant represented by the component (B) is subjected to an addition reaction of an aliphatic higher alcohol having 5 to 20 carbon atoms with two different alkylene oxides having 2 to 4 carbon atoms. Obtained by: Examples of the aliphatic higher alcohol having 5 to 20 carbon atoms include saturated or unsaturated primary higher alcohols, secondary higher alcohols, and tertiary higher alcohols. Among these higher alcohols, especially those having 10 to 10 carbon atoms from the viewpoint of degreasing.
A 14 saturated secondary higher alcohol is preferred. The XO of the component (A) is preferably ethylene oxide in terms of degreasing properties, and more preferably has an average addition mole number of 7 to 12 in terms of oil separation properties and detergency. If it is smaller than 7, the degreasing power and oil separation properties are slightly lowered, and if it is larger than 12, foaming is slightly increased. The component (B) Y
O is ethylene oxide, ZO is propylene oxide,
It is preferable from the viewpoints of detergency and low foaming property. More preferably, the average number of moles added is b in the range of 4 to 9, and c is in the range of 4 to 9.

Further, the content of the nonionic surfactant as the component (A) is preferably 1% by weight based on the whole washing solution.
Within this range, both high degreasing power and low foaming property required especially for industrial cleaning agents are satisfied. Also,
The content of the nonionic surfactant as the component (B) is preferably from 1% by weight to 20% by weight based on the entire washing liquid, and within this range, while maintaining a stable liquid (stock solution stability). , Realizing low foam property.

In the present invention, the mixing ratio of the nonionic surfactant (A) and the component (B) [(A) /
(B)] is in the range of 0.5 to 1.5 in weight ratio,
It is possible to obtain a washing liquid having excellent permeability without impairing the excellent degreasing power, oil separation property, stock solution stability and low foaming property of the components (A) and (B). [(A) /
When (B)] is out of this range, even if the obtained cleaning liquid has low permeability or shows good permeability, at least one of the above-mentioned excellent characteristics of the components (A) and (B) is excellent. Department will be lost. The range of [(A) / (B)] is more preferably 0.7 to 1.2, and within this range, the performances of degreasing, oil separation, stock solution stability, low foaming, and permeability are high. Can be realized at the level.

In the present invention, if necessary, a liquid stabilizer may be contained in order to enhance the stability of the stock solution. Hexanoic acid, heptanoic acid,
Octanoic acid, 2-ethylhexanoic acid, nonanoic acid, 3,
Examples thereof include amine salts and / or alkali metal salts of one or more aliphatic carboxylic acids selected from 5,5-trimethylhexanoic acid, decanoic acid, undecanoic acid, dodecanoic acid and the like. Examples of the amine include ethanolamines such as monoethanolamine, diethanolamine, triethanolamine, alkylated products thereof, and cycloalkylated products;
Propropanolamines such as monopropanolamine, dipropanolamine, tripropanolamine and their alkylated products and cycloalkylated products, monoisopropanolamine, diisopropanolamine, triisopropanolamine, and isopropanolamines such as their alkylated products and cycloalkylated products And ethylene oxide and propylene oxide adducts of ethylene diamine. Sodium as an alkali metal,
Potassium and the like. Among them, an aliphatic carboxylate having 8 to 9 carbon atoms is preferable, and the content thereof is 1 to 40% by weight.

Further, in the present invention, other surfactants,
Known additives, for example, alkali salts such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium borate, sodium phosphate and / or hydrates thereof, and corrosion of benzotriazole, nitrite, etc. Inhibitors, chelating agents such as gluconate, ethylenediaminetetraacetate, and nitrilotriacetate; defoamers such as fatty oils and silicone oils; ethylene glycol monoalkyl ether, ethylene glycol monophenyl ether, diethylene glycol monoalkyl ether, diethylene glycol mono Phenyl ether, triethylene glycol monoalkyl ether, triethylene glycol monophenyl ether, propylene glycol monoalkyl ether, propylene glycol monophenyl ether, dipropylene Glycol ethers having a linear, branched, or cyclic alkyl group having 1 to 8 carbon atoms, such as alcohol monoalkyl ether, dipropylene glycol monophenyl ether, tripropylene glycol monoalkyl ether, and tripropylene glycol monophenyl ether, and methanol. , Ethanol, isopropanol,
n-propanol, n-butanol, isobutanol,
Solvents such as t-butanol, n-amyl alcohol, isoamyl alcohol, s-amyl alcohol, t-amyl alcohol, benzyl alcohol, 3-methyl-3-methoxy-1-butanol, 3-methoxy-1-butanol, alcohols such as pyrrolidone and N-methylpyrrolidone It is also possible to mix and use them appropriately.

When the cleaning agent of the present invention is used in an actual cleaning step, it is further diluted with water. The concentration of the detergent active ingredient at that time is usually 0.05 to 15% by weight. The concentration of the detergent active ingredient is appropriately adjusted depending on conditions such as a cleaning method, a cleaning article, and a stain. In addition, as described above, this detergent maintains the degreasing power even with a low effective component by mixing the nonionic surfactant of the component (A) and the nonionic surfactant of the component (B) in a specific ratio. As a result, the detergent residue is not conspicuous and can be used without using a water rinsing step.

[0012] The water rinsing step referred to here means that the object to be washed, which has been washed with the present cleaning agent and which has a residue of the cleaning agent, is immersed in a container filled with water (immersion rinsing), By applying (spray rinsing) to completely remove the detergent residue. In the case of immersion rinsing,
The method also includes a step of using a water stream generated by pressurizing with a pump or using bubbling in combination. In the case of spray rinsing, a method of applying water by applying pressure by a pump or air is also included.

The present invention also describes a cleaning agent for an OPC aluminum pipe. The OPC aluminum tube is a cylindrical aluminum tube for applying an organic photoreceptor (OPC). The aluminum pipe coated with OPC is used as the heart of OA equipment such as a copying machine, an LBP (laser printer), and a laser fax (LF). OPC aluminum pipes may be made by extrusion and drawing, or they may be made by mirror-cutting the surface. The drawing oil, cutting oil, cutting powder, kerosene (cutting) In order to form a uniform photosensitive layer later with the oil and the drawing oil replaced), it is necessary to completely remove the oil such as the drawing oil, cutting oil and kerosene, and to completely remove the cutting powder. Further, since no detergent residue (cleaning agent stain) remains on the surface of the aluminum tube, even in various water rinsing processes such as babbling grease, the detergent residue attached to the aluminum tube is easily replaced with water. It is necessary that the performance, that is, the water rinsing property is good. As a result of intensive studies to solve these issues,
By blending a nonionic surfactant and an alkali metal salt, it has been found that the above-mentioned problems can be solved, and a cleaning liquid having high degreasing power against oil, high power to remove cutting powder, and excellent water rinsing properties can be obtained.

The nonionic surfactant includes polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenol ether, polyoxyalkylene alkyl fatty acid ester, polyoxyalkylene allyl phenol ether, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene alkyl. Examples include amines, sorbitan fatty acid esters, and polyoxyalkylenes. The nonionic surfactant contains one or more kinds, is preferably a combination of the nonionic surfactants according to claim 1, more preferably the nonionic surfactant according to claim 2, and further preferably The nonionic surfactant according to claim 3. Examples of the alkali metal salt include an alkali salt such as sodium hydroxide, potassium hydroxide, sodium carbonate, sodium silicate, sodium borate, sodium phosphate, and the like, and / or a hydrate thereof. From the viewpoint of the cutting powder removal power, the pH of the cleaning liquid
Preferably contains an inorganic alkali salt in such an amount as to give 9 to 10. Further, the inorganic alkali salt is preferably an alkali carbonate and / or a hydrate thereof, and its content is 0.1 to 40% by weight based on the entire washing liquid.
Phosphates are not preferred because they contain phosphorus, which is a regulated substance under the Water Pollution Control Law, and is listed in the Living Environment Items.
Further, silicate is not preferable because it etches and modifies the aluminum surface.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to examples. (1) Degreasing Force Test A 30-mesh stainless steel wire mesh (60 × 30 mm) was impregnated with the following metal working oil and heated at 100 ° C. for 30 minutes.
This was washed with the detergent shown in Table 1 diluted with a 3% by weight aqueous solution, rinsed with water and dried, and the degreasing ratio was calculated from the amount of oil adhering before and after washing by the following formula.

Metal working oil used in the test: Unicut GH
35 (trade name, manufactured by Nippon Oil Co., Ltd.) Degreasing rate (%) = {(oil content before washing−oil content after washing) / oil content before washing} × 100 (2) Permeability test A 1 cm × 1 cm canvas was The detergent of Table 1 diluted in a 3% by weight aqueous solution was gently placed horizontally on the water surface, and the time required for the canvas to settle was measured with a stopwatch. (3) Stock solution stability test The detergents in Table 1 were kept at 30 ° C. and 50 ° C., and the presence or absence of separation and precipitation of the detergent active components was observed. (4) Oil Separation Test 1 40 g of a 3% by weight aqueous solution of the detergent shown in Table 1 was placed in a 50-ml sample bottle, and 4 ml of kerosene colored with Sudan was added, followed by shaking for 1 minute with a shaker. After that, let it stand 7
The height of the oil separation phase after a minute was read. (5) Oil Separation Test 2 A 3% by weight aqueous solution of the cleaning agent shown in Table 1 was heated to 55 ° C., and cutting oil (Unicut GH35, manufactured by Nippon Oil Co., Ltd.) was added.
After the addition, the oil separation rate was determined by measuring the TOC (total organic carbon) of the liquid before and after the oil separation membrane at a constant flow rate. (6) Foaming test 100 ml of a 3% by weight aqueous solution of the cleaning agent shown in Table 1 was placed in a graduated cylinder equipped with a stopper and heated to 50 ° C.
Shake at a constant speed. The foam height was read immediately after and after standing for 1 minute. (7) Finishing property test A stainless test piece was immersed in a 3% by weight aqueous solution of the cleaning agent in Table 1 heated to 50 ° C. for 1 minute, pulled up, and then lifted.
It was dried at 00 ° C. for 5 minutes. The appearance was visually evaluated. (8) OPC aluminum pipe washing test The OPC aluminum pipe to which cutting oil and cutting powder are adhered is diluted with a 3% by weight aqueous solution, and ultrasonic cleaning is performed using the cleaning agent of Table 1 heated to 60 ° C. (Ultrasonic conditions: 28 kHz, 900
W, tank capacity 50 L), rinsed with water and dried, and then the washability was judged by ink wettability. (9) OPC aluminum pipe cutting powder removal test The OPC aluminum pipe with the cutting oil and cutting powder attached thereto was diluted with a 3% by weight aqueous solution and heated to 60 ° C using the cleaning agent shown in Table 1. Ultrasonic cleaning (ultrasonic conditions: 28 kHz, 900
W, tank capacity 50 L), rinsed with water, and dried. The aluminum tube was wiped with a nonwoven fabric, and the cutting powder adhering to the nonwoven fabric was visually evaluated. (10) OPC Aluminum Tube Bubbling Grinth Confirmation Test The OPC aluminum tube whose surface was clean was diluted with a 3% by weight aqueous solution and heated to 60 ° C. using the cleaning agent shown in Table 1 and subjected to ultrasonic cleaning ( Ultrasonic conditions: 28 kHz, 900 W, tank capacity 5
0L), followed by bubbling and drying, and the water rinsing property was determined by ink wettability.

[0017]

Examples 1 to 8 The cleaning agents shown in Table 1 were blended, and evaluation tests were conducted. Table 2 shows the results.

[0018]

Comparative Examples 1 to 4 The cleaning agents shown in Table 1 were blended and evaluated. Table 2 shows the results. Further, a finishing property test was conducted using the cleaning agent of this example, and the results of confirming that the cleaning agent can be used without using the water rinsing step are shown in Table 3. Table 4 shows the results of an OPC aluminum tube cleaning test, an OPC aluminum tube cutting powder removal test, and an OPC aluminum tube babbling grease confirmation test performed using the cleaning agent of this example.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

[Table 3]

[0022]

[Table 4]

[0023]

Industrial Applicability The present invention is a low-foaming liquid detergent excellent in degreasing power, oil separation properties, permeability and stability of a stock solution.

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Claims (7)

[Claims] 1. A composition containing one or more of the following components (A) and one or more components (B), and the mixing ratio of the components (A) and (B) [(A) / (B)] is A cleaning agent having a ratio in the range of 0.5 to 1.5. (A) a nonionic surfactant represented by the following general formula (1): R ¹ -O- (XO) _a -H (1) (R ¹ is an aliphatic hydrocarbon group having 5 to 20 carbon atoms, a mean 5~12.X in addition molar number, alkylene group having 2 to 4 carbon atoms) (B) a nonionic surfactant R ² over O over (YO) _b over represented by the following general formula (2) is (ZO) _c -H (2) (R ² is an aliphatic hydrocarbon group having 5 to 20 carbon atoms, b is an average addition mole number of 1 to 20, and c is an average addition mole number of 1 to 2
0, Y, and Z are different from each other, and have 2 to 4 carbon atoms. 2. The cleaning agent according to claim 1, wherein X and Y are ethylene groups and Z is a propylene group. 3. The liquid according to claim 1, wherein said at least one component (A) is contained in an amount of 1 to 10% by weight based on the whole washing liquid, and one or more components (B) is contained in an amount of 1 to 20% by weight based on the whole washing liquid. Washing soap. 4. A liquid stabilizer according to claim 1, 2 or 3, which contains a liquid stabilizer.
The cleaning agent as described. 5. A method for cleaning using the cleaning agent according to claim 1 without a water rinsing step. 6. A cleaning agent for an OPC aluminum pipe containing a nonionic surfactant and an alkali metal salt. 7. A method for cleaning an OPC aluminum tube, wherein the cleaning is performed using the cleaning agent according to claim 6, and then babbling is performed.