KR102042510B1 - Cleaner for ultrasonic washer and cleaning method using thereof - Google Patents

Abstract

The present invention relates to a cleaning agent composition and, more specifically, to a cleaning agent composition for an ultrasonic cleaner. The ultrasonic cleaning agent composition according to the present invention comprises: a nonionic surfactant in a form of a block copolymer composed of two or more polymers; and a solvent system, thereby providing excellent cleaning power.

Description

Ultrasonic cleaner composition and cleaning method using the same {CLEANER FOR ULTRASONIC WASHER AND CLEANING METHOD USING THEREOF}

The present invention relates to a cleaning composition, and more particularly to a cleaning composition for an ultrasonic cleaner.

It is a material that has been widely used in the field of precision cleaning in the automotive, electrical, electronic, precision machinery, and optical industries, and has 1,1,1-trichloroethane (1,1,1-trichloroethane) having excellent cleaning power. Chlorine based solvents such as 1,1-TCE) and tetrachloroethylene.

However, the 1,1,1-TCE is known as Ozone Depleting Substances (ODS), and the use of the 1,1,1-TCE has caused problems of depletion of the ozone layer and diffusion of carcinogens due to evaporation in the atmosphere. In addition, sewage contamination by chlorine-based solvents has proved to be a potential hazard to the global environment and human life, and its use has been reconsidered or prohibited from use.

Therefore, studies on alternative cleaner technologies have been actively conducted, and the alternative cleaner technologies can be broadly classified into chlorine, hydrocarbon, water, and compliance systems.

Although the chlorine-based cleaners occupy a large part of the overall market, serious problems in safety, such as strong human toxicity and carcinogenicity, have been pointed out, and the market size will decrease due to the proliferation of regulations on human-related working environment as well as environmental regulations. It is expected.

The hydrocarbon-based detergents have been pointed out flammability and drying problems, aromatic solvent-type detergents such as benzene, xylene, etc. are highly toxic to humans, so there are problems in human safety and environmental pollution, and are therefore strictly regulated.

In consideration of work safety such as human safety and flammable safety, a compliance or water based cleaner technology has recently attracted attention. This type of cleaning agent is basically a water-containing cleaning agent is superior to the solvent-based cleaners and the human safety and work safety, there is an advantage that can increase the cleaning power and cleanability by adding various surfactants and builders.

However, in the case of such water-based or semi-systemic detergents, it is necessary to develop an appropriate organic solvent and a surfactant system in order to achieve the same performance as other types of organic solvents mentioned above.

In this regard, U.S. Patent No. 5,853,498 (hereinafter referred to as 'Patent Document 1') uses a nonionic surfactant, allows the water and organic substances phase-separated from the water to stand in a washing vessel, phase-separates and removes the cleaning target from the lower layer. Disclosed is a cleaning method comprising the step of cleaning.

However, Patent Document 1 discloses only the effects of forming an aqueous phase and an oil phase in the upper layer and the lower layer of the cleaning liquid, and does not disclose the effect according to the type of the cleaning liquid.

Korean Patent Publication No. 10-0795364 (hereinafter referred to as 'Patent Document 2') is an anticorrosive compound selected from the group consisting of amino phosphates, polyamines and polycarboxylic acids, surfactants, first and second oxide etchant, metal etchant, A corrosion preventing cleaning liquid composition for a semiconductor substrate containing deionized water as a main component is disclosed.

Patent document 2 discloses only the effect of using the 1st and 2nd oxide etching liquids, such as a sulfuric acid or a fluorine compound, and does not show the effect according to the kind of surfactant.

Thus, as a detergent that can be used in the field of precision cleaning using ultrasonic waves, it is harmless to the human body and can prevent the problem of ozone layer destruction, and there is still a high need for a technology capable of providing excellent cleaning power.

United States Patent Application Publication No. 5,853,489 (Registration Date: Dec. 29, 1998) Korean Patent Publication No. 10-0795364 (Registration Date: 2008.01.10)

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an ultrasonic cleaner capable of exhibiting high cleaning power for contaminants and preventing the ultrasonic cleaning apparatus from being damaged.

In addition, an object of the present invention is to provide an ultrasonic cleaning composition and a cleaning method using the same, which can provide a cleaning effect comparable to or higher than that of the conventional cleaning agent while having a low risk to the human body.

The object of the present invention is not limited to the above-mentioned object, and other objects not mentioned above are clearly understood by those skilled in the art to which the present invention pertains (hereinafter referred to as 'normal technician') from the following description. Could be.

In order to solve the above problems, the ultrasonic cleaning composition according to the present invention is an antifoaming agent; Preservatives; A first surfactant in the form of a block copolymer composed of two or more polymers; And a solvent system comprising a first solvent and a second solvent different from the first solvent.

In order to achieve the object of the present invention as described above, and to perform the characteristic functions of the present invention described below,

As described above, according to the present invention, a non-ionic surfactant in the form of a block copolymer composed of two or more polymers, which provides excellent detergency with high solubility to contaminants while having high safety for humans. Can be exercised.

In addition, since it is weakly alkaline and contains a corrosion inhibitor, it is possible to prevent the ultrasonic cleaning device from being damaged.

Also provided are ultrasonic cleaner compositions that exhibit good cleaning power against a variety of contaminants, including certain solvents and surfactants.

The effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly recognized by those skilled in the art from the following description.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

The terms or words used in the specification and claims of the present invention are not to be construed in a conventional or dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way. Based on the principle, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Throughout the specification of the present invention, when a part is said to "include" a certain component, it means that it can further include other components, without excluding the other components unless otherwise stated. .

In the specification of the present invention, "A and / or B" means A or B, or A and B.

In addition, the term 'contains as a main ingredient' in the present specification may include other components other than the listed components, but may include more components as long as the other components included do not substantially affect the listed components. Can be interpreted.

Ultrasonic cleaning composition according to the present invention, defoamer; Preservatives; A first surfactant in the form of a block copolymer composed of two or more polymers; And a solvent system comprising a first solvent and a second solvent different from the first solvent.

In general, ultrasonic cleaning, which allows material cleaning to be cleaned by ultrasonic means, has been used in various fields. The ultrasonic cleaning generates ultrasonic waves of a predetermined frequency in the ultrasonic oscillator disposed in the cleaning container in a state in which the material to be cleaned is immersed in the cleaning liquid contained in the cleaning container.

As a result, ultrasonic vibrations are induced in the cleaning liquid, and impurities such as oil or dust adhering to and around the surface of the material to be cleaned are removed by cavitation of the cleaning liquid.

When ultrasonic waves are generated in a solution, a phenomenon in which fine bubbles are generated and disappeared by the pressure of the ultrasonic waves when the ultrasonic energy propagates in the solution is called a cavity phenomenon.

That is, the pressure of the ultrasonic wave is repeatedly reduced pressure and pressure increase, the negative pressure is formed in the pressure-reduced side half-cycle at the ultrasonic wave, and fine bubbles are generated by the cavitation. The bubble contracts at elevated pressure and expands at reduced pressure, and the particle diameter increases while repeating contraction and expansion until the surface tension of the solution is greater than or equal to. When the pressure of the bubble is increased above the surface tension of the solution, the bubble contracts and explodes, causing a very large shock wave, which breaks down the bubble to remove the contaminants on the surface of the wash.

The composition of the cleaning liquid may vary depending on the type of contaminant to be cleaned and the material of the material to be cleaned, and generally, a material having high cleaning power is used.

In this regard, conventionally, a solvent such as 1,1,1-trichloroethylene (1,1,1-TCE) was used, which has been identified as a carcinogen through experiments by the International Cancer Institute. Pointed out and treated as prohibited or regulated substance.

Thus, the ultrasonic cleaner composition according to the present invention comprises a first surfactant in the form of a block copolymer composed of two or more polymers. The first surfactant may be a polyoxyethylene / polyoxypropylene block copolymer or a polyoxypropylene / polyoxyethylene / polyoxypropylene block copolymer. The first surfactant is included in an amount of 1.5 to 2.5 wt% based on the total weight of the composition.

By using the nonionic first surfactant, it is possible to secure high cleaning power and solve a problem harmful to the human body, and thus it is possible to replace the use of the 1,1,1-TCE. The first surfactants offer high safety but tend to have lower cleaning efficiency compared to trichloroethylene, which is pointed out as a harmful substance. Accordingly, the present invention is to provide an ultrasonic cleaner composition that can provide a superior cleaning ability compared to the conventional trichloroethylene-based cleaner by including a solvent system optimized for the first surfactant.

In addition, the ultrasonic cleaning composition according to the present invention includes an antifoaming agent. The antifoaming agent can suppress the generation of bubbles to minimize the effect of the buffer generated by the detergent buffer the ultrasonic energy when the ultrasonic wave is applied to the wash water when using the ultrasonic cleaner. The antifoaming agent is not particularly limited as long as it does not cause a chemical reaction with other components of the ultrasonic cleaning composition of the present invention and does not change the properties of the composition. For example, octanol, cyclohexanol, ethylene glycol and silicone oil It may be at least one selected from the group consisting of.

The antifoaming agent is added in a small amount relative to the total weight of the composition, and preferably, the antifoaming agent is included in 0.0009 to 0.0011% by weight based on the total weight of the composition.

The ultrasonic cleaner composition according to the present invention comprises a corrosion inhibitor. The corrosion inhibitor prevents corrosion that may occur in the object to be cleaned after using the detergent composition. The corrosion inhibitor may be included in an amount of 0.05 to 0.50 wt% based on the total weight of the composition.

In one embodiment, the preservative includes at least one of benzotriazole, sodium metasilicate and sodium orthosilicate. In one embodiment, the preservative may be composed of benzotriazole, sodium metasilicate and sodium oligosilicate, in which case the weight ratio of benzotriazole and (sodium metasilicate and sodium ososilicate) is 1: 4 to 6 It was confirmed that the corrosion protection effect was the best against iron, aluminum, zinc, copper and the like.

In addition, the ultrasonic cleaner composition of the present invention includes a solvent system comprising a first solvent and a second solvent different from the first solvent, that is, two or more solvents. In one embodiment, the first solvent is distilled water, the second solvent is 1-methyl-2-pyrrolidinone, dipropylene glycol, 3-meth It includes one or more selected from the group of methoxy-3-methyl-1-butanol and diethylene glycol monobutyl ether. In one embodiment, the second solvent may be included in 3 to 5% by weight based on the total weight of the composition.

In addition, the ultrasonic cleaner composition according to the present invention may further include a second surfactant containing an unsaturated fatty alcohol ethoxylate. The unsaturated fatty alcohol ethoxylate may be ethoxylated palmitoleyl alcohol or oleyl alcohol having 18 carbon atoms. The unsaturated fatty alcohols, in particular, have been found to be useful because there are two reaction sites between the hydroxyl group and the carbon double bond.

In one embodiment, the unsaturated fatty alcohol is oleyl alcohol ethoxylate. In a preferred embodiment, two or more oleyl alcohols having different moles of ethylene oxide addition are included. For example, it is preferable to include an oleyl alcohol having an ethylene oxide added mole number of 5 and an oleyl alcohol having an ethylene oxide added mole number of 8 together. The oleyl alcohol ethoxylate may be included in an amount of 1 to 3 wt% based on the total weight of the composition.

In addition, the ultrasonic cleaning composition according to the present invention may further include sodium hydroxide. When the sodium hydroxide is added, it further improves the cleaning power, provides acidity control and sterilization function. The sodium hydroxide is included in 0.3 to 0.6% by weight based on the total weight of the composition.

In addition, the present invention may further include a metal ion encapsulant. The metal ion encapsulant blocks ions present in water. In one embodiment, the metal ion encapsulant comprises at least one of EDTA-4Na, sodium triphosphate, sodium hexametaphosphate. Sodium triphosphate also acts as a builder, dispersing and solubilizing each component. In addition, hexamethine sodium serves as a metal ion blocking function, and also serves to disperse each component and prevent staining of the object to be cleaned. The metal ion sealant, based on the total weight of the composition, may be included in 0.6 to 1.5% by weight.

In addition, the present invention may further include a dissolution enhancer. The dissolution enhancer is intended to dissolve the hydrophobic material. In one embodiment, the dissolution enhancer is any one of sodium xylene sulfonate, xylene sulfonate potassium and xylene sulfonate calcium. The dissolution enhancer, 1.2 to 1.8% by weight based on the total weight of the composition.

The ultrasonic cleaning composition according to the present invention may further include sodium nitrate.

According to one aspect of the invention, there is provided a method for producing an ultrasonic cleaner composition. Ultrasonic cleaner composition production method of the present invention,

A first step of adding a first solvent to the first mixer and heating to 50 to 70 ° C., followed by mixing the corrosion inhibitor;

A second step of maintaining a temperature at 30 to 40 ° C. in a second mixer separate from the first mixer and mixing the first solvent and the metal ion blocking agent;

Adding a solution mixed in the first step into the second mixer, and sequentially dissolving a first surfactant and a second surfactant different from the first surfactant into the second mixer;

A fourth step of mixing the dissolution enhancer in the second mixer;

A fifth step of mixing a second solvent different from the first solvent into a second mixer into which the dissolution enhancer is added; And

And a sixth step of introducing an antifoaming agent into the second mixer.

Preferably, the first step is performed simultaneously with the second step.

The first solvent in the second step means that the same kind of solvent or additional amount as in the first step is added.

In one embodiment, the first solvent is distilled water or deionized water, and the preservative comprises at least one of benzotriazole, sodium metasilicate and sodium osilicate. In one embodiment, the preservative comprises all of benzotriazole, sodium metasilicate and sodium oligosilicate, wherein the weight ratio of benzotriazole and (sodium metasilicate and sodium oligosilicate) is 1: 4 to 6.

In one embodiment, the metal ion sequestrant comprises at least one of sodium triphosphate, sodium hexametaphosphate and EDTA-4Na.

In one embodiment, the first surfactant is a surfactant in the form of a block copolymer composed of two or more polymers, and may be polyoxyethylene / polyoxypropylene block copolymer or polyoxypropylene / polyoxyethylene / polyoxy Propylene block copolymers.

In one embodiment, the second surfactant is a nonionic surfactant. In one embodiment, the second surfactant comprises an ethoxylated unsaturated fatty alcohol. In one embodiment, the ethoxylated unsaturated fatty alcohol is oleyl alcohol ethoxylate. In one embodiment, the second surfactant may further comprise an ethoxylated-propoxylated alcohol and alpha-dodecyl-omega-hydroxy-polyoxyethylene.

In one embodiment, the dissolution enhancer comprises at least one of xylene sulfonate sodium, xylene sulfonate potassium and xylene sulfonate calcium.

In one embodiment, the second solvent is an organic solvent. In one embodiment, the second solvent is selected from the group consisting of 1-methyl-2pyrrolidinone, dipropylene glycol, 3-methoxy-3-methyl-1-butanol and diethylene glycol monobutyl ether. At least one.

In addition, since the information on the above-described ultrasonic cleaner composition may be applied to the ultrasonic cleaner composition manufacturing method as it is, redundant description will be omitted.

According to an aspect of the present invention, there is provided a cleaning method using the ultrasonic cleaning composition. Cleaning method using the ultrasonic cleaning composition according to the present invention,

(a) preparing an ultrasonic cleaner composition comprising an antifoam, a corrosion inhibitor, a first surfactant and a solvent system; And

(b) heating the ultrasonic cleaner composition to 30 to 40 ° C., immersing the object to be cleaned and applying ultrasonic waves intermittently at predetermined time intervals.

In one embodiment, the ultrasonic cleaning composition of step (a) is prepared as described above. Therefore, duplicated content will be omitted.

In the step (b), the time for applying the ultrasonic wave may be 1 to 30 seconds, and intermittent means stopping the irradiation of the ultrasonic wave for a predetermined time, approximately 1 to 10 seconds, and then applying the ultrasonic wave again. Step (b) may be repeated several times.

Production Example

Ultrasonic cleaner compositions were prepared with the ingredients and contents listed in Tables 1 and 2 below. Preparation of the composition was made using the method described above.

ingredient Example 1 Example 2 Example 3 Example 4 Example 5 Polyoxyethylene Oxypropylene Glycol Ether 2 2 2 2 2 Benzotriazole 0.08 0.08 0.08 0.08 0.08 Sodium metasilicate - - - - 0.3 Sodium oligosilicate - - - - 0.1 1-methyl-2-prolidone 1.5 1.5 1.5 1.5 1.5 Dipropylene glycol - 1.5 1.5 1.5 1.5 3-methoxy-3-methyl-1-butanol - - 0.5 0.5 0.5 Diethylene glycol monobutyl ether - - - 0.5 0.5 Oleyl alcohol (add 5 moles of ethylene oxide) - - - - - Oleyl alcohol (addition of 8 moles of ethylene oxide) - - - - - Sodium hydroxide 0.5 0.5 0.5 0.5 0.5 EDTA-4Na 0.5 0.5 0.5 0.5 0.5 Sodium triphosphate 0.5 0.5 0.5 0.5 0.5 Hexametaphosphate - - - - - Xylene sulfonate sodium - - - - - Antifoam 0.001 0.001 0.001 0.001 0.001 Distilled water Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount

ingredient Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Polyoxyethylene Oxypropylene Glycol Ether 2 2 2 2 2 2 Benzotriazole 0.08 0.08 0.08 0.08 0.08 0.08 Sodium metasilicate 0.15 - - - - 0.3 Sodium oligosilicate 0.1 - - - - 0.1 1-methyl-2-prolidone 1.5 1.5 1.5 1.5 1.5 1.5 Dipropylene glycol 1.5 1.5 1.5 1.5 1.5 1.5 3-methoxy-3-methyl-1-butanol 0.5 0.5 0.5 0.5 0.5 0.5 Diethylene glycol monobutyl ether 0.5 0.5 0.5 0.5 0.5 0.5 Oleyl alcohol (add 5 moles of ethylene oxide) - 1.5 1.5 - - 1.5 Oleyl alcohol (addition of 8 moles of ethylene oxide) - One - - - One Sodium hydroxide 0.5 0.5 0.5 0.5 0.5 0.5 EDTA-4Na 0.5 0.5 0.5 0.5 0.5 0.5 Sodium triphosphate 0.5 0.5 0.5 0.5 0.5 0.5 Hexametaphosphate - - - 0.1 - 0.1 Xylene sulfonate sodium - - - - 1.5 1.5 Antifoam 0.001 0.001 0.001 0.001 0.001 0.001 Distilled water Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount

Experimental Example 1: Evaluation of Cleaning Power

In order to confirm the cleaning power of the ultrasonic cleaners prepared in Examples 1 to 11, a cleaning test was performed by applying drawn oil and rust preventive oil as oil contaminants on the stainless steel specimens, respectively. Ultrasonic waves were added for 30 seconds, 60 seconds, and 90 seconds, and the cleaning rate was calculated by measuring the amount of oil decontamination with a digital precision balance. The results of the calculated percent cleansing rate are shown in Tables 3 and 4 below.

(Drawing oil) Cleaning rate (%) 30 seconds 60 seconds 90 sec Example 1 48 61.1 78.1 Example 2 48.2 64.2 81.9 Example 3 47.8 62.7 82.1 Example 4 49.3 63.4 84.0 Example 5 48.7 63.0 83.2 Example 6 49.1 62.1 82.5 Example 7 54.3 69.2 88.5 Example 8 52.1 67.3 85.9 Example 9 54.5 69.7 88.3 Example 10 56.7 70.6 89.4 Example 11 57.3 72.1 89.9

(Rustproof oil) Cleaning rate (%) 30 seconds 60 seconds 90 sec Example 1 84.5 90.1 94.7 Example 2 84.7 90.8 94.6 Example 3 88.8 93.3 96.3 Example 4 90.2 94.7 97.1 Example 5 90.9 94.8 96.9 Example 6 90.7 94.6 96.8 Example 7 91.3 95.8 97.5 Example 8 89.9 92.1 95.9 Example 9 90.3 94.4 96.8 Example 10 92.1 95.0 98.1 Example 11 93.6 96.2 99.2

Referring to Tables 3 and 4 above, it can be seen that the removal of oil contaminants using the cleaning agent of the present invention shows a high cleaning rate.

After 90 seconds of cleaning, it showed an average of 80% or more of the cleaning power, and in particular, the anti-rust oil showed an average of 90% or more of cleaning ability even after 30 seconds of cleaning. In addition, although not shown in Tables 3 and 4, approximately 1 to 3% improvement in cleaning rate was observed when ultrasonic waves were applied intermittently (repeat of ultrasonic irradiation and stop) at 3 second intervals during 30 second cleaning.

Therefore, in the case of using the ultrasonic cleaner of the present invention, it is possible to secure high cleaning power and to solve both air pollution problems and human safety problems.

Experimental Example 2: Evaluation of Residues and Stains After Washing

In Experimental Example 1, the specimens washed for 90 seconds were dried and then visually evaluated for the presence of residues and stains. In particular, in the compositions to which sodium hexametaphosphate of Examples 9 and 11 were added, it was confirmed that little residue or stain remained on the surface of the specimen.

Experimental Example 3: Evaluation of Corrosion Resistance

Iron plate 5 × 5 cm specimens were immersed in each of the compositions prepared by Examples 1 to 11 and then stored for 5 days, 15 days, and 30 days in a thermostat maintained at 30 ° C. The corrosion of the stored specimens was visually observed.

<Evaluation Criteria>

○: no corrosion

△: slight corrosion

×: severe corrosion

Corrosion protection 5 days 15th 30 days Example 1 ○ ○ △ Example 2 ○ ○ △ Example 3 ○ ○ △ Example 4 ○ ○ △ Example 5 ○ ○ ○ Example 6 ○ ○ △ Example 7 ○ ○ △ Example 8 ○ ○ △ Example 9 ○ ○ △ Example 10 ○ ○ △ Example 11 ○ ○ ○

In the case of the composition according to the present invention, even when immersed for more than 15 days it was confirmed that the excellent corrosion protection. In Example 5 and Example 11 in which the weight ratio of benzotriazole and (sodium metasilicate and sodium oligosilicate) was 1: 5, it was confirmed that corrosion occurred in the specimen even when immersed for 30 days or more.

Those skilled in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

Claims (11)

Antifoam;
Preservatives;
A first surfactant in the form of a block copolymer composed of two or more polymers;
Second surfactants including unsaturated fatty alcohol ethoxylates; And
A solvent system comprising a first solvent and a second solvent different from the first solvent;
In the ultrasonic cleaning composition comprising:
The ultrasonic cleaner composition is
0.0009 to 0.0011 weight percent antifoam, based on the total weight of the composition; 0.05 to 0.50% by weight of corrosion inhibitor; 1.5 to 2.5 wt% first surfactant; 1-3 wt% of a second surfactant; And a solvent system comprising 3 to 5 wt% of a second solvent and a balance of the first solvent;
The first solvent is distilled water,
The second solvent includes two or more selected from the group consisting of 1-methyl-2-pyrrolidinone, dipropylene glycol, 3-methoxy-3-methyl-1-butanol and diethylene glycol monobutyl ether. and,
The preservative comprises benzotriazole and (sodium metasilicate and sodium oligosilicate) in a weight ratio of 1: (4 to 6),
The first surfactant is a polyoxyethylene / polyoxypropylene block copolymer,
And the second surfactant is oleyl alcohol ethoxylate. delete delete delete delete delete delete The ultrasonic cleaner composition according to claim 1, further comprising a dissolution enhancer, wherein the dissolution enhancer comprises xylene sulfonate sodium, xylene sulfonate potassium, and xylene sulfonate calcium. The ultrasonic cleaner composition according to claim 1, further comprising a metal ion encapsulant including sodium hexametaphosphate. delete Antifoam; Preservatives; A first surfactant in the form of a block copolymer composed of two or more polymers; Second surfactants including unsaturated fatty alcohol ethoxylates; And a solvent system comprising a first solvent and a second solvent different from the first solvent, wherein the ultrasonic cleaner composition comprises:
A first step of adding distilled water, which is a first solvent, to a first mixer and heating to 50 to 70 ° C., followed by mixing a corrosion inhibitor;
A second step of maintaining a temperature at 30 to 40 ° C. in a second mixer separate from the first mixer simultaneously with the first step, and mixing distilled water as a first solvent and a metal ion sequestrant;
Adding a solution mixed in the first step into the second mixer, and sequentially dissolving a first surfactant and a second surfactant different from the first surfactant in the second mixer;
A fourth step of mixing the dissolution enhancer in the second mixer;
A fifth step of mixing a second solvent in a second mixer into which the dissolution enhancer is added; And
And a sixth step of introducing an antifoaming agent into the second mixer.
The second solvent includes two or more selected from the group consisting of 1-methyl-2-pyrrolidinone, dipropylene glycol, 3-methoxy-3-methyl-1-butanol and diethylene glycol monobutyl ether. ,
The ultrasonic cleaner composition is
0.0009 to 0.0011 weight percent antifoam, based on the total weight of the composition; 0.05 to 0.50% by weight of corrosion inhibitor; 1.5 to 2.5 wt% first surfactant; 1-3 wt% of a second surfactant; And a solvent system comprising distilled water which is 3 to 5 wt% of a second solvent and the remaining amount of the first solvent.
The preservative includes benzotriazole and (sodium metasilicate and sodium oligosilicate) in a weight ratio of 1: (4 to 6),
The first surfactant is a polyoxyethylene / polyoxypropylene block copolymer,
Wherein said second surfactant is oleyl alcohol ethoxylate.