JPH08283974A - Detergent composition for metallic parts - Google Patents

Abstract

PURPOSE: To clean various metallic parts capable of easily rinsing with high quality without generating rust or surface change. CONSTITUTION: An alkyl ether carboxylic acid expressed by a chemical formula, R-O(CH2 CH2 O)m -CH2 COOM (wherein, R expresses a 8-18C linear or branched alkyl group or alkenyl group, M expresses hydrogen, an alkali metal, ammonium and (m) expresses integers of 2-8) is used as an available components. And 10-20 pts.wt. alkylether carboxylic acid is mixed to 100 pts.wt. mixture of one or more kinds of anionic, nonionic, cationic or amphoteric surfactants.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition used for cleaning metal parts, and more specifically, a cutting oil, a press oil, and a drawing oil from a metal cutting product, a pressing product, and a punching product. The present invention relates to a cleaning composition for metal parts, which removes oily stains such as and stains such as hand grease.

[0002]

2. Description of the Related Art Metal parts have various processing processes such as cutting, pressing, and drilling from material to product.
The processing oil suitable for each processing is used. Further, various inspections are performed in an inspection process according to the processing process. Cleaning of this metal part is not limited to after processing,
It is performed before the inspection process and the assembly process. The cleaning agent used for this cleaning is required to not only remove dirt but also to affect the material such as not altering the surface of the component during or after cleaning.

Such metal parts have hitherto been prepared by dipping, ultrasonic wave, barrel or the like using a halogen type solvent such as trichloroethane, trichloroethylene, ethylene chloride or freon, or a hydrocarbon type solvent such as kerosene, benzene or xylene. It has been washed. However, in recent years, the number of places replacing water-based cleaning agents has increased due to global environmental issues or safety-oriented issues.

Various types of water-based cleaning agents have been proposed. For example, before the plating step, an alkaline degreasing agent comprising caustic soda, an alkali metal silicate, phosphate or carbonate and an alkaline degreasing agent containing a surfactant is used. In addition, recently, it has been attempted to improve the shortage of cleaning power or the short life. For example, Japanese Unexamined Patent Publication (Kokai) No. 57-149500 proposes a degreasing detergent for metals containing an inorganic alkali builder, an organic builder, a chelating agent and a nonionic surfactant as essential components. Further, JP-A-2-225685 proposes an aqueous detergent for a metal surface having a pH of 7 to 12.5, which comprises a surfactant, a builder, a corrosion inhibitor and a polyglycol ether.

[0005]

Halogen-based solvents such as trichloroethane and freon have a problem that they cannot be used after 1996 due to the conclusion of the Montreal Protocol due to the problem of ozone layer depletion. In addition, it has been pointed out that trichlorethylene and ethylene chloride also have carcinogenicity, which poses a problem of low safety to the human body. On the other hand, many hydrocarbon solvents such as benzene are subject to regulation by the organic law, which not only has a problem for human safety but also has flammability and is dangerous in work.

On the other hand, when cleaning with an aqueous cleaning agent,
In order to make up for the lack of detergency against the washing, a builder is often added or washing is performed with a high-concentration surfactant.
However, iron-based metals are likely to rust due to water. Further, aluminum-based and copper-based metals also have a problem in that the surface is easily altered by the builder. For example, JP-A-57-149
The cleaning agent disclosed in Japanese Patent No. 50 does not cause rust on iron-based metals, but alters the surface on aluminum or copper-based metals.

On the other hand, in Japanese Patent Laid-Open No. 2-225685, an attempt is made to add a corrosion inhibitor, but surface deterioration cannot be completely suppressed, and the stability of the cleaning agent is poor. Various types of corrosion inhibitors are commercially available.By adding these to the cleaning agent, it is possible to prevent rust or corrosion of a specific type of metal. It is not versatile enough to prevent rusting or corrosion of these types of metals. Further, it has been pointed out that cleaning agents containing builders are difficult to rinse and that treatment of rinse water after rinsing is difficult.

The present invention has been made in consideration of such circumstances, and solves the above-mentioned problems such as rust generation or surface alteration by a builder, rinsing difficult, and rinsing water treatment difficult. However, it is an object of the present invention to provide a cleaning composition for metal parts, which is capable of removing stains adhering to metal parts with high quality.

[0009]

MEANS FOR SOLVING THE PROBLEMS [MEANS FOR SOLVING THE PROBLEMS] The metal detergent composition of the present invention for achieving the above object has the chemical formula R
_{-O- (CH 2 CH 2 O)} m -CH 2 COOM ( wherein,
R is a linear or branched alkyl group having 8 to 22 carbon atoms,
It is an alkenyl group, M is hydrogen, an alkali metal, or ammonium, and m is an integer of 2 to 10. The main component is an alkyl ether carboxylic acid represented by the formula (1).

The metal detergent composition of the present invention contains the above-mentioned alkyl of the above chemical formula based on 100 parts by weight of a general anionic, nonionic, cationic or amphoteric surfactant, or a mixture of several kinds thereof. It is a mixture of 10 to 20 parts by weight of ether carboxylic acid.

The alkyl ether carboxylic acid having the above-mentioned chemical formula is a natural surfactant excellent in safety and stability, and is a higher alcohol or a medium-chain or long-chain surfactant which has long been used as a detergent or an emulsifier. Alcohol is the starting material. Then, it can be obtained by introducing a polyoxyethylene chain into this starting material and further carboxylating it. This alkyl ether carboxylic acid is excellent in safety, stability, biodegradability, dispersibility and penetration.

Also, The performance of this alkyl ether carboxylic acid gradually changes depending on the type of R, the type of M, or the size of m in the chemical formula. For example, if the carbon number of R is small, the lipophilicity is low, and if it is large, the lipophilicity is large. If the carbon number of R is too small, the detergency is lowered, and if it is too large, the hydrophilicity is lowered too much and the water rinsing property is deteriorated. Therefore, R is preferably a linear or branched alkyl group or alkenyl group having 8 to 18 carbon atoms, more preferably 10 to 15 carbon atoms.

On the other hand, when M is hydrogen, it has anionic and nonionic properties, and is excellent in surface tension lowering ability and dissolving power for dirt such as oil. When M is an alkyl metal, it is excellent in water rinsing property, hard water resistance, emulsifying power and dispersing power.

[0014] m indicates the degree of hydrophilicity, and the larger the value, the stronger the hydrophilicity. On the other hand, if m is too large, the hydrophilicity is too large and the detergency is reduced. On the other hand, when m is too small, the hydrophilicity is unnecessarily lowered, and the water rinse property becomes difficult. Therefore, m is preferably an integer of 2-8.

The above-mentioned alkyl ether carboxylic acid is
Since it has a carboxyl group or carboxylate ion in the molecule, it has the property of being easily adsorbed on the metal surface. Therefore, in the detergent containing the alkyl ether carboxylic acid, the alkyl ether carboxylic acid is selectively adsorbed on the metal surface of the object to be cleaned, thereby protecting the metal surface from the builder and the like and preventing rust generation or deterioration. be able to.

As described above, the alkyl ether carboxylic acid has not only the ability as a surfactant but also the ability to protect the metal surface from rust and alteration. That is, since the alkyl ether carboxylic acid is both a surfactant and a corrosion inhibitor, the detergent containing the alkyl ether carboxylic acid as a main component is a builder for compensating for the insufficient detergency and a corrosion inhibitor for protecting the metal surface. There is no need to add a separate agent.

In the present invention, the alkyl ether carboxylic acid is washed by adding it to a detergent composition containing one or a mixture of anionic, nonionic, cationic or amphoteric surfactants as a main component. There is an advantage that the metal surface can be protected at the same time as the strength is improved. The amount of alkyl ether carboxylic acid added at this time is preferably 10 to 20 parts by weight with respect to 100 parts by weight of the above-mentioned detergent composition. If the amount is less than this, there is a possibility that the metal surface protection ability may not be sufficiently exhibited.

[0018]

The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited thereto.

Example 1 Chemical formula C ₁₂ H ₂₅ O (CH ₂ C
A cleaning composition having the following composition containing an alkyl ether carboxylic acid composed of H ₂ O) ₅ CH ₂ COOH as a main component was prepared. C ₁₂ H ₂₅ O (CH ₂ CH ₂ O) ₅ CH ₂ COOH 5% by weight Ethanol 0.5% by weight Water 94.5% by weight

A stainless steel flat plate (70 mm × 70 mm) made of stainless SUS304 was used as a test sample for cleaning property.
70 mm) as a cutting oil under the trade name "Unicut GH3
5 "(manufactured by Nippon Oil Co., Ltd.) was applied. This sample was ultrasonically cleaned (40 KHz, 100 W) for 1 minute with the detergent composition having the above-described composition kept at 25 ° C., and then rinsed with city water (40 KHz, 100 W) for 1 minute. Finally, it was forcedly dried at 105 ° C. for 10 minutes.
Then, the weight of the cutting oil remaining on the flat plate was measured.

Next, iron SPCC, aluminum A10
The surface protection ability was tested using three types of flat plates made of 50 and brass C2801 (all 20 mm × 50 mm) as samples. In this test, after the following treatments, the presence or absence of rust or surface deterioration was visually observed. That is, after being immersed in the above-mentioned detergent composition at room temperature for 24 hours, it is forcibly dried. After being immersed in the above cleaning composition for 1 minute, it is rinsed with pure water for 1 minute with ultrasonic waves (40 KHz, 100 W), and then dried with a drier, and then 40
Leave for 24 hours in an atmosphere of ℃ and 95% relative humidity.

The results of these tests are shown in Table 1 which will be described later. In the test of cleaning property, the cutting oil can be cleaned without causing any change on the surface of the sample before and after cleaning. Further, in the surface protection ability test and in each of the tests, neither rust nor surface alteration was observed on the surfaces of the three types of samples of iron, aluminum and brass.

Example 2 Alkyl ether of Example 1
Carboxylic acid only C₁₃H₂₇O (CH₂CH₂O) ₃CH
₂Change to COOH and make the same cleaning composition for others.
Made. Using this detergent composition, exactly the same as in Example 1
Of the cleaning property and surface protection test
Was. The detergency test does not cause changes on the sample surface.
I was able to clean the cutting oil. Also, the surface protection ability test
Then, rust or surface deterioration occurred on the surface of the three types of samples.
Did not

Example 3 For the alkyl ether carboxylic acid of Example 2, C ₁₃ H ₂₇ O (CH ₂ CH ₂ O) ₆ CH ₂ COOH in which m in the above chemical formula is increased
A cleaning composition changed to was prepared. Using this cleaning composition, the same test of cleaning property and experiment of surface protection property as in Example 1 were conducted. In the detergency test, the cutting oil could be cleaned without causing any change on the surface of the sample.
Further, in the surface protection ability test, rust or surface alteration was not caused on the sample surfaces of the three kinds of metals.

Example 4 Alkyl ether of Example 3
Carboxylic acid only C₁₆H₃₁O (CH₂CH₂O) ₆CH
₂A detergent composition in which COOH was used was prepared. This wash
Test of detergency exactly the same as in Example 1 using the cleaning composition
And surface protection experiments were performed. Detergency test
Cleans the cutting oil without changing the sample surface.
I was able to clean it. In addition, three kinds of metals were used in the surface protection test.
Does not cause rust or surface alteration on the sample surface of
Was.

Example 5 For the alkyl ether carboxylic acid of Example 3, C ₁₃ H ₂₇ O (CH ₂ CH ₂ O) ₃ CH ₂ C in which M in the above chemical formula is sodium.
A cleaning composition changed to OONa was produced. Using this cleaning composition, the same test of cleaning property and experiment of surface protection property as in Example 1 were conducted. In the detergency test, the cutting oil could be cleaned without causing any change on the surface of the sample. Further, in the surface protection ability test, rust or surface alteration was not caused on the sample surfaces of the three kinds of metals.

Example 6 Alkyl ether carboxylic acid
Not one type, but unneutralized C₁₂H_{twenty five}O (CH₂CH₂
O)_FiveCH₂COOH (M = hydrogen) and neutralized C₁₃H
₂₇O (CH₂CH ₂O)₃CH₂COONa (M = N
A cleaning composition having the following composition containing two kinds of a) as main components
Was produced. C₁₂H_{twenty five}O (CH₂CH₂O)_FiveCH₂COOH 2.5 wt% C₁₃H₂₇O (CH₂CH₂O)₃CH₂COONa 2.5% by weight Ethanol 0.5% by weight Water 94.5% by weight

Using this detergent composition, the same test of cleaning property and experiment of surface protection property as in Example 1 were carried out. In the detergency test, the cutting oil could be cleaned without causing any change on the surface of the sample. Further, in the surface protection ability test, rust or surface alteration was not caused on the sample surfaces of the three kinds of metals.

Table 1 shows the test results of Examples 1 to 6 above. In the "cleaning test" column of the table, "○" indicates that the amount of oil residue is 30% or less, and "△" indicates that the amount of oil residue is 30 to 50%.
"X" indicates that the residual amount of oil is 50% or more. Further, in the "Surface protection test" in the table, "○" indicates that there was no rust and surface alteration in the test and "X" indicates that there was rust or surface alteration in the test or. As is clear from the table, alkyl ether carboxylic acid is changed, -CH ₂ CH ₂ O (ethylene oxide) addition mole number m is changed, alkyl ether carboxylic acid salt is changed, or several kinds are added. Even if the above alkyl ether carboxylic acid is mixed, the detergent composition has excellent detergency and surface protection.

[0030]

[Table 1]

Example 7 In Examples 7 and 8 below, an alkyl ether carboxylic acid was added to an anionic or nonionic surfactant. In this Example 7, an alkyl ether carboxylic acid C ₁₂ similar to that in Example 3 was used.
_{H 25 O (CH 2 CH 2} O) 6 CH 2 COOH detergents composed mainly of a nonionic surfactant "EE-1110"
A detergent composition having the following composition added to (manufactured by Olympus Optical Co., Ltd.) was prepared. C ₁₃ H ₂₇ O (CH ₂ CH ₂ O) ₆ CH ₂ COOH 1% by weight EE-1110 10% by weight Water 89% by weight

Using this detergent composition, the same test of cleaning property and experiment of surface protection property as in Example 1 were carried out. The results are shown in Table 2 which will be described later. In the test of the cleaning property, the cutting oil could be cleaned without causing any change on the surface of the sample. Further, in the surface protection ability test, rust or surface alteration was not caused on the sample surfaces of the three kinds of metals. The alkyl ether carboxylic acid C ₁₂ H ₂₅ O (CH
_{When the amount of 2} CH ₂ O) ₆ CH ₂ COOH added was less than 1% by weight, iron was rusted in the surface protection experiment, and the surface protection was not sufficiently exhibited.

(Example 8) The same alkyl ether as in Example 3 was used.
-Tercarboxylic acid C₁₂H_{twenty five}O (CH₂CH₂O) ₆CH
₂COOH and anionic surfactant C₁₂H_{twenty five}OSO₃N
A cleaning composition having the following composition containing a was prepared. C₁₂H_{twenty five}OSO₃Na 4 wt% C₁₃H₂₇O (CH₂CH₂O)₆CH₂COOH 1% by weight Ethanol 0.5% by weight Water 94.5% by weight

Using this detergent composition, the same test of cleaning property and experiment of surface protection property as in Example 1 were carried out. In the detergency test, the cutting oil could be cleaned without causing any change on the surface of the sample. Further, in the surface protection ability test, rust or surface alteration was not caused on the sample surfaces of the three kinds of metals.

Table 2 shows the test results of Examples 7 and 8 above. In the "cleaning test" column of the table, "○" indicates that the amount of oil residue is 30% or less, and "△" indicates that the amount of oil residue is 30 to 50%.
"X" indicates that the residual amount of oil is 50% or more. Further, in the "Surface protection test" in the table, "○" indicates that there was no rust and surface alteration in the test and "X" indicates that there was rust or surface alteration in the test or. As is clear from the table, the detergent composition in which the alkyl ether carboxylic acid is added to the anionic or nonionic surfactant has excellent detergency and surface protection.

[0036]

[Table 2]

Comparative Example 1 As an example of supplementing the detergency by adding a builder, a detergent composition having the following composition containing a nonionic surfactant and an alkali builder was prepared. Caustic soda 1% by weight C ₁₂ H ₂₅ O (CH ₂ CH ₂ O) ₇ H 4% by weight Ethanol 0.5% by weight Water 94.5% by weight

Using this detergent composition, the same test of cleaning property and experiment of surface protection property as in Example 1 were conducted. The results are shown in Table 3 which will be described later. In the detergency test, the amount of residual oil was small and the cutting oil could be sufficiently washed. On the other hand, in the surface protection test, it was found that the liquid property of the detergent composition is alkaline, so that the aluminum and brass excluding iron are surface-altered and cannot be applied to these metals.

(Comparative Example 2) As an example in which a builder is added to make up for the lack of detergency and a rust preventive agent is added to prevent surface alteration, a nonionic surfactant, an alkali builder and a rust preventive agent are used. A cleaning composition having the following composition containing "Non-last CAL-2" (manufactured by Shin Nippon Science Co., Ltd.) was prepared. Na ₂ HPO ₃ 1% by weight C ₉ H ₁₉ C ₆ H ₆ O (CH ₂ CH ₂ O) ₇ H 4% by weight Non-last CAL-2 0.5% by weight Ethanol 0.5% by weight Water 94% by weight

Using this detergent composition, the same test of cleaning property and experiment of surface protection property as in Example 1 were conducted. In the detergency test, the amount of oil residue was small, and the cutting oil could be sufficiently washed. On the other hand, in the surface protection test, since the liquid property of the cleaning composition is alkaline,
It has been found that aluminum and brass except iron have surface alterations and cannot be applied to these metals.

Table 3 shows the test results of the above Comparative Examples 1 and 2. In the "cleaning test" column of the table, "○" indicates that the amount of oil residue is 30% or less, and "△" indicates that the amount of oil residue is 30 to 50%.
"X" indicates that the residual amount of oil is 50% or more. Further, in the "Surface protection test" in the table, "○" indicates that there was no rust and surface alteration in the test and "X" indicates that there was rust or surface alteration in the test or. As is clear from the table, all of the comparative examples have good cleanability, but cannot be cleaned without causing rust or surface alteration on all metals, and are adapted depending on the type of metal. It has the drawback that it cannot.

[0042]

[Table 3]

[0043]

The cleaning composition of the present invention has the chemical formula RO-
_{(CH 2 CH 2 O) m} -CH 2 COOM ( wherein, R is a straight-chain or branched alkyl group, an alkenyl group having 8 to 18 carbon atoms, M represents hydrogen, alkali metal, ammonium, m is It represents an integer of 2 to 8), and contains an alkyl ether carboxylic acid as an active ingredient, and does not cause rust or surface alteration on various metal parts and is easy to rinse. Moreover, there is no danger of ozone layer destruction, and it can be safely used by the human body.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Manabu Tomiya 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Satoru Hashimoto 3-24-3 Hasune, Itabashi-ku, Tokyo Within Japan Surfactant Industry Co., Ltd. (72) Inventor Yasuhiro Sakura 1-8-8 Nihonbashi-Bakurocho, Chuo-ku, Tokyo Inside Nikko Chemicals Co., Ltd.

Claims (2)

[Claims] 1. A detergent composition for metal parts, which comprises an alkyl ether carboxylic acid represented by the formula (1) as a main component. _{R-O- (CH 2 CH 2} O) m -CH 2 COOM ( wherein (1)) (wherein, R represents a linear or branched alkyl group having 8 to 18 carbon atoms, an alkenyl group, M is hydrogen , Alkali metal, and ammonium, and m represents an integer of 2 to 8.) 2. An alkyl ether carboxylic acid represented by the formula (1) is contained in an amount of 10 to 20 parts by weight based on 100 parts by weight of one kind or a mixture of several kinds of anionic, nonionic, cationic or amphoteric surfactants. A detergent composition for metal parts, which is mixed.