KR20140107167A - Composition for Cleaning and Method with the Same - Google Patents

Abstract

The present invention relates to a detergent composition and, specifically, to a detergent composition capable of efficiently removing an oxide film on the surface of a material by being applied to an alloy or metal such as aluminum, an aluminum alloy, or a copper alloy. The detergent is composed of water in which potassium carbonate, sodium borate, a surfactant, sodium benzoate, EDTA (ethylenediaminetetraacetic acid), and sodium gluconate are dissolved, and a pH thereof is adjusted as 9.5-12.0. Therefore, the detergent is applied to the surface of aluminum, an aluminum alloy, copper, or a copper alloy.

Description

Technical Field [0001] The present invention relates to a cleaning composition and a cleaning method,

The present invention relates to a detergent composition and a cleaning method, and more particularly, to a detergent composition and a cleaning method which can be effectively applied to a metal or alloy such as aluminum, aluminum alloy, copper or copper alloy,

Chemicals for animal or vegetable oil or mineral oil adhering to the surface of the material are called cleaners or degreaser. Generally, it may be composed of an alkaline degreasing agent such as caustic soda, sodium silicate, sodium phosphate, and blue soda, and a solvent such as trichlorethylene, 1,1,1-trichloroethane, tetrachlorethylene-propone or methylene chloride. Various methods such as steam cleaning, immersion cleaning, spray cleaning, or ultrasonic cleaning can be used as a cleaning method using a cleaning agent or degreasing agent.

As a prior art relating to cleaning or degreasing, there is a low temperature degreasing method of a cold-rolled steel sheet as disclosed in Patent Publication No. 2000-0032100. The prior art is directed to a method for degreasing a cold-rolled steel sheet by immersing a cleaning solution containing a caustic soda solution, wherein dodecyl alcohol ethoxylate and sodium gluconate are added to the caustic soda solution in an amount of 0.25 - 0.45 wt% of a cold-rolled steel sheet and immersing the cold-rolled steel sheet in a caustic soda immersion liquid containing dodecyl alcohol, ethoxylate and sodium gluconate at 45 to 60 ° C. Lt; / RTI >

Another prior art related to cleaning or degreasing is Patent Disclosure No. 1997-0043307 'A degreasing solution having excellent degreasing property for a rolling oil film containing synthetic ester oil'. The prior art is concerned with a degreasing solution used in alkaline and electrolytic degreasing processes in which rolling oil containing synthetic ester oil is degreased at a high speed in a rolling oil film present on the rolled steel sheet and contaminants at a high speed, and sodium hydroxide 1 to 3 wt 1.0 to 3.0 wt% of a nonionic surfactant, 1.0 to 3.0 wt% of polyepoxyethylene nonylphenyl ether, 0.1 to 3.0 wt% of sodium gluconate, 0.1 to 3.0 wt% of butyl cellosolve, 0.1 to 3.0 wt% of an anionic surfactant, To 2.0 wt% of a degreasing solution.

Another prior art related to detergents or degreasing agents is Patent Disclosure No. 2006-0020436, " degreasing agents having excellent bubble resistance and cleanability ". The prior art relates to a degreasing agent for removing rolling oil or anti-corrosive oil present in a cold-rolled steel sheet after a rolling process, and discloses a degreasing agent having excellent fouling and cleaning properties as well as environmental pollution. In the prior art, an aqueous solution prepared by mixing sodium hydroxide and a builder at a weight ratio of 20: 1.5 to 6.5 is used as a first solution, and 5.0 to 9.0 wt% of a nonionic surfactant, sodium naphthalenesulfonate , 2.5 to 6.0 wt% of a stabilizer selected from 1,2-benzylisotriazole or a mixture thereof, diethylenetriamine penta (methylphosphonic) acid sodium salt, (1-hydroxyethylidene) diphospho 0.0 > 1 < / RTI >: 0.020-1 < / RTI > by weight weight ratio of the first solution and the second solution in a solution comprising 0.4 to 1.2 wt% of an organic chelating agent selected from sodium nitrate, sodium nitrate sodium salt, : 0.450, and a degreasing agent excellent in cleaning property and cleaning property.

The known detergent is applied to a steel sheet and has a problem that the use temperature is high and handling or storage is not easy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art and has the following objectives.

The object of the present invention is to provide a cleaning agent which can be applied to aluminum, an aluminum alloy, copper or copper alloy, and which is easy to store and handle and which is environmentally friendly.

Another object of the present invention is to provide a cleaning method which can be applied to aluminum, an aluminum alloy, copper or copper alloy, and which is easy to store and handle and which is environmentally friendly.

According to a preferred embodiment of the present invention, the detergent is selected from the group consisting of potassium carbonate, sodium borate, surfactant, sodium benzoate, ethylenediaminetetraacetic acid (EDTA) and sodium gluconate And adjusted to a pH of 9.5 to 12.0 and applied to the surface of aluminum, aluminum alloy, copper or copper alloy.

According to another preferred embodiment of the present invention, potassium carbonate is 8-12 wt%, sodium borate is 8-12 wt%, surfactant is 3-8 wt%, sodium benzoate is 0.5-1.2 wt%, EDTA is 0.5-5 wt% 1.2 wt% sodium gluconate and 5 ~ 9 wt% of sodium gluconate and the total weight is 100 wt%.

According to another preferred embodiment of the present invention, the cleaning method comprises dissolving sodium borate, a surfactant, ethylenediaminetetraacetic acid (EDTA), sodium gluconate, and an antimicrobial agent in water to a pH of 9.5 to 10.5 to prepare a cleaning concentrate ; A diluting step of diluting the washed concentrate with stirring so as to have a concentration of 4 wt% to 10 wt% of the total weight with stirring; Adjusting the temperature using a temperature controller such that the diluted cleaning solution is circulated using a circulation pump and the temperature is 35 to 45 캜; Immersing the object to be cleaned in the cleaning solution; And washing the object to be cleaned with foreign substances. In the step of controlling the temperature, the pH is adjusted to 9.0 to 11.4 using a pH adjusting agent.

According to another preferred embodiment of the present invention, the antimicrobial agent is potassium carbonate or sodium benzoate.

The cleaning agent according to the present invention has an advantage that it is possible to prevent environmental pollution and easy handling and storage because water is used as a solvent. Also, the cleaning agent according to the present invention has an advantage that the smut is not generated even during a long period of immersion and the oxide film on the surface of the material can be effectively removed. Further, the cleaning agent according to the present invention does not contain a heavy metal component or a harmful chemical component, and has an advantage of being excellent in degreasing power while being environmentally friendly.

FIG. 1 is a schematic view showing a process of cleaning by a cleaning agent according to the present invention.
2 shows the result of cleaning the aluminum surface by the cleaning agent according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

The detergent according to the present invention may be composed of water in which potassium carbonate, sodium borate, a surfactant, sodium benzoate, EDTA (ethylenediaminetetraacetic acid) and sodium gluconate are dissolved .

The detergent may be used for removing contaminants such as fine particles from the surface of the material, stains such as oil, or any chemical contaminants that contaminate the work surface. The material may be, for example, aluminum, aluminum alloy, copper or copper alloy, and the contaminants may be removed, for example, by dipping.

In the present invention, the cleaning agent can be used as a concept including a degreasing agent, and the foreign matter to be removed is not particularly limited.

Potassium carbonate, sodium borate, surfactant, sodium benzoate, EDTA and sodium gluconate powder may be prepared for the preparation of detergents. Potassium carbonate dissolves in water but does not dissolve in alcohol and shows strong alkalinity. In the detergent according to the present invention, potassium carbonate can perform the bleaching and cleaning action while changing the water to be added in a ductile manner. Potassium carbonate can be prepared in powder form.

Sodium borate has the function of antimicrobial agent and the function of pH regulator. Sodium borate can be prepared in the form of powder, and the addition amount can be appropriately determined in the subsequent pH control process.

Surfactants such as cationic surfactants or anionic surfactants can be used, but preferably nonionic surfactants can be used. The surfactant may be added for the purpose of cleaning for the removal of impurities and may be added to the aqueous solution of dodecyl alcohol ethoxylate, polyepoxyethylene nonylphenyl ether, polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, alkyl polyoxyethylene sulfates, alkyl phosphates , Alkyl sulfobetaine, alkyl carboxybetaine, fatty acid sorbitan ester, fatty acid dimethanolamine or alkyl monoglyceryl ether.

Sodium benzoate can be added to improve the antimicrobial properties and to lower the high pH caused by potassium carbonate. Sodium benzoate can be mixed with other ingredients in powder form.

EDTA (ethylenediaminetetraacetic acid) can be used to prevent discoloration of the surface of the material while at the same time preventing foreign matter from adhering to the surface of the material. And may also have a function of preventing other cleaning components from acting on foreign matter. EDTA may be added in crystalline powder form.

Sodium gluconate can be added for the cleaning action of the surface and the removal of metallic particles. Sodium gluconate can also function as a dispersant and can be added in powder form.

Potassium carbonate, sodium borate, surfactant, sodium benzoate, EDTA and sodium gluconate can all be dissolved in water. Such components can be dissolved in water to form a cleaning concentrate. For the formation of the washing concentrate, 8-12 wt% of potassium carbonate, 8-12 wt% of sodium borate, 3-8 wt% of surfactant, 0.5-1.2 wt% of sodium benzoate, 0.5-1.2 wt% of EDTA, Sodium gluconate may be dissolved in water to 5 to 9 wt% and the total weight to 100 wt%. When the potassium carbonate is lower than 8 wt%, it is difficult to maintain the proper pH. When the potassium carbonate is higher than 12 wt%, the amount of other components may be increased due to the high pH. Sodium borate has a function of controlling the pH in relation to antibacterial activity, so the amount can be appropriately adjusted according to the amount of potassium carbonate. Surfactants can be determined by considering the reaction with other components, and when the EDTA is outside a specified amount, the function may be weakened or stained.

The components associated with the cleaning of the powder form can be dissolved in water and stored in a sealed state at a temperature of, for example, 5 to 30 DEG C with sufficient agitation. The components in powder form may be added to water in turn or added at the same time.

Hereinafter, the process of cleaning the surface of aluminum, aluminum alloy, copper or copper alloy material by the cleaning agent according to the present invention will be described.

FIG. 1 is a schematic view showing a process of cleaning by a cleaning agent according to the present invention.

Referring to FIG. 1, in order to clean or degrease a surface of a workpiece using the cleaning agent according to the present invention, a solid is prepared and dissolved in water to produce a cleaning concentrate (P11). The cleaning concentrate may include sodium borate, a surfactant, ethylenediaminetetraacetic acid (EDTA), sodium gluconate, and an antimicrobial agent. In this specification, the antimicrobial agent may be, but not limited to, potassium carbonate or sodium benzoate, and other antimicrobial substances having solubility in water may be used.

When potassium carbonate, sodium benzoate or other antimicrobial agent is used, the weight of the antimicrobial agent may be 9 to 13 wt% and the other ingredients may be added at the same weight as described above. However, potassium carbonate is advantageously added for pH maintenance. The concentration of the concentrate can be adjusted so that the pH is 9.5 to 12.0.

A cleaning tank equipped with a temperature control device capable of heating and cooling, stirring means, and a circulation pump for cleaning or degreasing the surface of the workpiece is prepared. The cleaning tank can be made of the same material as stainless steel but can be made of any material that is resistant to the alkali and does not react with the additive. The concentrated washing liquid may be added to the tank together with the stirring to dilute the concentrated washing liquid so that the water is introduced into the washing tank and the weight ratio of the concentrated washing liquid is 4 wt% to 10 wt% (P12). Dilution is carried out with stirring and temperature control (P13). The temperature can be adjusted to 35 to 45 ° C and stirring can be continuously performed during the addition process. If necessary, circulation of the diluting liquid can be achieved by using a circulating pump. Circulation of the diluent is intended to prevent rapid dissolution and local heating.

When the cleaning liquid into which the concentrated cleaning liquid is introduced becomes transparent, the material can be immersed in the tank while maintaining the above-mentioned temperature (P14). And the immersion state can be maintained for 3 to 10 minutes and the washing liquid can be stirred or circulated during the immersion process. Ultrasonic waves can be applied as needed. The ultrasonic wave can be applied to any ultrasonic device known in the art.

When the specified time has elapsed, the material can be taken out and washed with water or a mixed solution of water and alcohol. And can be dried by suitable hot air drying equipment (P15).

The pH can be maintained in the range of 9.0 to 11.4 during the washing process, and the pH can be controlled by the amount of the added solid or by the pH adjusting agent or buffer solution. A pH adjusting agent or a buffer solution of various compounds may be used and the present invention is not limited by the kind of the pH adjusting agent or buffer solution.

The surface of the aluminum material was cleaned by the cleaning agent according to the present invention.

A cleaning agent or a degreasing agent was prepared by using potassium carbonate, sodium borate, a surfactant, sodium benzoate, EDTA, and sodium gluconate and named as ALDI series (ALDI series) and the cleaning surface was cleaned.

Example

Example 1 (ALDI Series)

Step 1: Water to make 9 wt% of potassium carbonate, 9 wt% of sodium borate, 5 wt% of surfactant, 0.8 wt% of sodium benzoate, 0.6 wt% of EDTA and 6 wt% of sodium gluconate so that the total weight is 100 wt% To prepare a concentrated cleaning liquid.

Step 2: A cleaning tank was prepared, diluted with water with a concentration of 7 wt% and a pH of 10.1. The temperature was adjusted to 35 ° C and stirring and circulation were carried out.

Step 3: The aluminum alloy was deposited for 3 to 5 minutes.

Step 4: The surface state of the aluminum alloy was observed under a microscope at 100 and 200 magnifications.

Examples 2 to 4 (ALDI Series)

The experiment was conducted in the same manner as in Example 1 except that the amount of potassium carbonate was adjusted so that the pH of the washing liquid was 9.8, 11.2 and 11.1, respectively.

The experimental results are shown in Fig.

Referring to FIG. 2, it can be seen that the degree of cleaning varies depending on the pH. It can be confirmed that the optimum pH is 10.1. Although the optimum pH can be varied depending on the material, it has been confirmed that the optimum pH value of aluminum, aluminum alloy, copper or copper alloy has a similar value.

The cleaning agent according to the present invention has an advantage that it is possible to prevent environmental pollution and easy handling and storage because water is used as a solvent. Also, the cleaning agent according to the present invention has an advantage that the smut is not generated even during a long period of immersion and the oxide film on the surface of the material can be effectively removed. Further, the cleaning agent according to the present invention does not contain a heavy metal component or a harmful chemical component, and has an advantage of being excellent in degreasing or washing power while being environmentally friendly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

P11: Preparation and dissolution of solids
P12: Dilution
P13: stirring and heating
P14: Deposition and ultrasonic application
P15: Cleaning and drying

Claims (2)

1. A detergent composition for cleaning surfaces of aluminum, an aluminum alloy, copper or copper alloy,
8 to 12 wt% of potassium carbonate, 8 to 12 wt% of sodium borate, 3 to 8 wt% of a surfactant, 0.5 to 1.2 wt% of sodium benzoate, Wherein the cleaning agent composition comprises 1.2 wt% of ethylenediaminetetraacetic acid (EDTA), 5 to 9 wt% of sodium gluconate, and water to make the whole 100 wt%, and the pH is 9.5 to 12.0. A method of cleaning a work surface by a cleaning agent for removing an oxide film on the surface of aluminum, aluminum alloy, copper or copper alloy,
Sodium carbonate, potassium carbonate 8-12 wt%, sodium borate 8-12 wt%, sodium benzoate 0.5-1.2 wt%, surfactant 3-8 wt%, ethylenediaminetetraacetic acid 0.5-1.2 wt% and sodium gluconate, Dissolving 5 to 9 wt% in water to have a total weight of 100 wt% so as to have a pH of 9.5 to 12.0 to prepare a washing concentrate;
A diluting step of diluting the washed concentrate with stirring so as to have a concentration of 4 wt% to 10 wt% of the total weight with stirring;
Adjusting the temperature using a temperature controller such that the diluted cleaning solution is circulated using a circulation pump and the temperature is 35 to 45 캜;
Immersing the object to be cleaned in the cleaning solution when the introduced cleaning solution becomes transparent; And
Washing the object to be cleaned with foreign matter,
Wherein the pH is adjusted to 9.0 to 11.4 using a pH adjusting agent in the temperature control step.

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