KR101127112B1 - Metal detergents and method for fabricating the same - Google Patents

Abstract

PURPOSE: A metal detergent and a method for fabricating the same are provided to ensure a metal detergent with low prices by employing nitroethane or 1-nitropropane as a reaction stabilizing additive. CONSTITUTION: A metal detergent comprises 1,2-dichloropropane of 90-97 weight%, a reaction stabilizing additive of 2-6 weight%, and d-limonene of 1-3 weight%. The 1,2-dichloropropane is provided to wash a metal material. The reaction stabilizing additive includes nitroethane or/and 1-nitropropane in order to stabilize the reaction of the metal material. The d-limonene is a deodorant to remove bad smell produced during washing of the metal material.

Description

Metal cleaner and its manufacturing method {METAL DETERGENTS AND METHOD FOR FABRICATING THE SAME}

The present invention relates to a metal cleaner that suppresses oxidative reactivity to metals such as aluminum or copper, and enables vapor degreasing cleaning and ultrasonic degreasing cleaning, and a method for producing the same.

Various metal cleaners have been developed for the removal of various oil components used for metal processing, removal of flux from electromagnetic plates, and removal of contaminants from precision workpieces.

Currently used organic solvents such as trichloroethylene (TCE), 1,1,1-trichloroethane (1,1, -TCE) perchloroethylene (PCE), methylene chloride (MC), etc. Has been. However, these organic solvents are carcinogenic and are the main causes of ozone depleting substances, limiting their use around the world or reducing production in stages for some substances.

The materials currently being used as alternative cleaners for these substances include halogen-based organic solvents such as 1,2-dichloropropane-based cleaner and 1-bromopropane-based cleaner, and hydrocarbon-based, water-based, and compliant systems. It is.

1,2-dichloropropane-based cleaners are inexpensive and have good cleaning power, but there are risks in their use due to reactivity with metals. 1-bromopropane-based cleaners have good performance as alternative cleaners, but they are expensive and have a TWA. Benzene level of 25ppm has a restriction on use, and hydrocarbon type is difficult to use because of high risk of fire. In the case of water-based and compliance-based cleaners, the existing equipment cannot be used as it is, so the initial installation cost is high and the role as an alternative cleaning agent is insufficient due to problems such as waste water generation.

Accordingly, the present invention, the low-cost and chlorine-based solvent 1,2-dichloropropane, which can replace the materials to lower the reactivity to the metal, carcinogenicity and does not participate in ozone layer destruction, it is excellent in versatility for the applied material The device currently in use can be used as it is, and to provide an alternative cleaning agent that is not limited to the dipping method, ultrasonic method, steam degreasing method, and spray method.

In order to solve the above object, the metal cleaning agent of one embodiment of the present invention, 90 to 97% by weight of 1,2-dichloropropane for cleaning the metal object and nitro ethane is configured to stabilize the reactivity of the metal object and It may comprise 2 to 6% by weight of a reaction stabilizing additive comprising at least one of 1- nitro propane.

According to one aspect of an exemplary embodiment of the present invention, the reaction stabilizing additive may include 1-3 wt% of nitroethane, and 1-3 wt% of 1-nitropropane.

According to one aspect of an exemplary embodiment of the present invention, the nitro ethane has a boiling point of 114 ° C., and thus serves as a low boiling point stabilizer, and the 1-nitro propane has a boiling point of 132 ° C. and thus may function as a high boiling point stabilizer.

According to one aspect of an exemplary embodiment of the present invention, the metal cleaner may further include 1-3 wt% of dilimonene, which is a deodorant for removing odor generated while cleaning the metal object.

According to one embodiment of the present invention, the metal cleaning agent, as an antioxidant for preventing oxidation of the metal object, further comprises 0.01 to 0.05% by weight or less of 2,3-di-tert-butyl-P-cresol can do.

In another embodiment of the present invention, the mixed metal cleaner may control the evaporation rate of the product by mixing one of 1,1-dichloro-1-fluoroethane and 1-bromopropane with the metal cleaner.

According to another embodiment of the present invention, the mixed metal cleaner, the 1,1-dichloro-1-fluoroethane may be mixed 30 to 50% by volume with respect to the metal cleaner.

According to another embodiment of the present invention, the mixed metal cleaner may mix 30% to 50% of the 1-bromopropane with respect to the metal cleaner.

According to another embodiment of the present invention, the 1,2-dichloropropane may be stabilized through activated carbon.

Another embodiment of the present invention is a method for preparing a metal cleaner, comprising: purifying by mixing the activated carbon in the ratio of 100: 20 or more to 1,2-dichloropropane; And 1 to 3% of nitro ethane and 1 to 3% of 1-nitro propane by weight of 1,2-dichloropropane to prepare a mixture.

According to one embodiment of another embodiment of the present invention, the method of manufacturing a metal cleaner, after mixing activated carbon in a ratio of 100: 20 or more to 1,2-dichloropropane, and lowering the residual chlorine ion concentration to 5 ppm or less through air blending It may further comprise a step.

According to another embodiment of the present invention, after mixing activated carbon in a ratio of 100: 20 or more to the 1,2-dichloropropane, lowering the residual chlorine ion concentration to 5 ppm or less through air blending, the water content It may include the step of maintaining below 900ppm.

According to another embodiment of the present invention, the method for preparing the metal cleaner may further include mixing 1-3% of dirimonene with respect to the weight of 1,2 dichloropropane in the mixture.

According to another embodiment of the present invention, the method for preparing a metal cleaner includes 0.01 to 0.05% of an antioxidant 2,3-di-tert-butyl-P-cresol based on the weight of the 1,2-dichloropropane. Further mixing into the mixture may be further included.

According to one embodiment of the present invention having the above-described configuration, low-cost 1,2-dichloropropane can be made compatible with expensive TCE, high versatility of the applied material, and can be applied to various cleaning methods.

In addition, according to an embodiment of the present invention, the price is low, the generation of carcinogens in the metal cleaning process is low, environmental hazard is low environmentally friendly.

1 is a view showing the effect of changing the acidity according to the ultraviolet exposure of the metal cleaner of one embodiment of the present invention.
Figure 2 is a flow chart illustrating a method of manufacturing a metal cleaner which is one embodiment of the present invention.

Hereinafter, the function and operation of the components of the metal cleaner, which is an embodiment of the present invention, will be described in more detail.

Metal cleaning agent according to an embodiment of the present invention, 90 to 97% by weight of 1,2-dichloropropane (1,2-DICHLOROPROPANE) for cleaning a metal object, nitro ethane (NITRO) configured to stabilize the metal object reactivity ETHANE) and 2 to 6% by weight of a reaction stabilizing additive comprising at least one of 1-nitro propane, wherein the nitro ethane has a boiling point of 114 ° C. In addition, the 1-nitro propane has a boiling point of 132 ° C., thereby functioning as a high boiling point stabilizer. In addition, the metal cleaner may further include 1-3 wt% of dilimonene and 0.01 to 0.05 wt% of 2,3-di-tert-butyl-P-cresol.

[1,2-dichloropropane]

1,2-dichloropropane is a factor that determines the cleaning power of the metal cleaner, and when it is 90% or less, the cleaning power may be deteriorated, and when the content of the reaction stabilizing additive described later is 10% or more, a part of 1,2-dichloropropane Due to the flame retardant properties, the risk of fire may be increased, and when the reaction addition stabilizer is 3% or less, the reaction stability to the metal, which is the object of cleaning, may be reduced, and therefore, it should not exceed 97%.

[Reaction Stabilizing Additives]

In the metal cleaner according to the present invention, a reaction stabilizing additive is added to lower the metal reactivity of 1,2-dichloro propane. Since the reaction stabilizing additive is expensive, the more it is used, the better the reaction stability with respect to the metal can be strengthened the stability contained in the 1,2-dichloropropane, but the cleaning power increases as the amount is increased It is preferable to mix | blend in an appropriate ratio because it weakens and a manufacturing cost becomes high, Therefore, 2-6 weight% of reaction stabilizing additives may be included. If less than 2% by weight, harmful substances are generated above the reference value during the cleaning process.

As such a reaction stabilizing additive, nitroethane and 1-nitro propane can be used. Since the nitro ethane has a boiling point of 114 ° C., the nitro ethane functions as a low boiling point stabilizer (primary stabilizer), and the metal cleaner including the same may be used as the low boiling point metal cleaner. In addition, since the 1-nitro propane has a boiling point of 132 ° C. to function as a high boiling point stabilizer (secondary stabilizer), the metal cleaner including the same may be used as a high boiling point metal cleaner. In addition, according to the purpose of the user, nitro ethane and 1-nitro propane may be appropriately mixed to prepare a metal cleaner having an appropriate boiling point.

Nitro ethane and 1-nitro propane used as the reaction stabilizing additive may be included in an amount of 1-3 wt%.

[Dirimonene]

Dilimonene is a nonpolar ring compound that is fat-soluble and has a washing action and a deodorizing action. In the present invention, it is added to reduce the smell. In one embodiment of the present invention, the metal cleaner may contain 1-3 wt% of dilimonene. If less than 1% by weight, sufficient deodorization is not achieved, when more than 3% by weight, the above-described 1,2-dichloropropane and the reaction stable additive is added less, so that the problem to be solved by the present invention is not solved. There is a concern.

[2,3-di-tert-butyl-P-cresol]

According to one embodiment of the present invention, the metal cleaner may further comprise 0.01-0.05% by weight of 2,3-di-tert-butyl-P-cresol. The 2,3-di-tert-butyl-P-cresol is an antioxidant and is also called an antioxidant. By further including such 2,3-di-tert-butyl-P-cresol, it prevents oxidation, prevents contamination of metal objects, and inhibits decomposition of 1-2 dichloropropane when exposed to ultraviolet rays, thereby minimizing generation of residual chlorine ions. It is possible to maximize the stability of the storage state in the container.

Hereinafter, it will be described through an actual test example whether the metal cleaner having the above-described constitution has superior reactivity as compared to the conventional metal cleaner.

EXAMPLE

Examples according to the invention consist of 94% 1,2-dichloro propane, 2% nitroethane, 3% 1-nitro propane and other impurities. The specific gravity is 1.16 g / cm 3 and the water content is 615 ppm.

Comparative Example 1

Comparative Example 1 is a metal cleaner consisting of 75% of 1,2-dichloropropane and other impurities, with a specific gravity of 1.25 g / cm 3 and a water content of 415 ppm.

Comparative Example 2

Comparative Example 2 is a metal cleaner containing 50% of 1,2-dichloropropane and 50% of trichloroethylene.

[Experimental Conditions and Results for Metal Reactivity]

In order to confirm the reactivity with the metal, aluminum, copper, zinc, iron, and lead were added to the cleaning agent, and then heated to 90 ° C., dried at room temperature, and tested for corrosion reaction. As a result, in the examples according to the present invention, metal corrosion did not occur, whereas in Comparative Example 1 and Comparative Example 2, all corrosion occurred.

Reactivity to Metals number ingredient Example Comparative Example 1 Comparative Example 2 One aluminum X O O 2 Copper X O O 3 zinc X O O 4 lead X O O

[Experimental Conditions and Results of Long-term Storage Stability with UV Exposure]

In order to confirm the long-term stability of the UV exposure, the pH change was observed after storing each in the UV lamp chamber for 7 days. As a result, in the Examples according to the present invention there is almost no change in acidity, whereas in Comparative Examples 1 and 2, the acidity increased sharply. The confirmation thereof can also be confirmed in FIG.

Long-term storage stability comparison NO QUV Early Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 One Example 0.12 0.16 0.17 0.19 0.24 0.29 0.31 2 Comparative example  One 0.135 0.193 0.273 0.354 0.435 0.52 0.59 3 Comparative example  2 0.02 0.21 0.36 0.58 0.92 1.21 1.51

Hereinafter, the mixed metal cleaner in which the metal cleaner having the above-described configuration and other substances are mixed will be described.

That is, the above-mentioned metal cleaner may be mixed with one of 1,1-dichloro-1-fluoroethane (HCFC-141B) and 1-bromopropane (N-PROPYL BROMIDE) to control the evaporation rate of the product. . That is, when 1,1-dichloro-1-fluoroethane is mixed with the metal cleaner, the initial evaporation rate of the product is controlled so that when the initial evaporation is required at an early stage, the 1,1-dichloro-1- is used for the metal cleaner. Fluoroethane may be mixed at a volume ratio of 30-50%. That is, 1,1-dichloro-1-fluoroethane has a boiling point at 32 ° C., and therefore is effective for initial evaporation.

On the other hand, since 1-bromopropane has a boiling point of about 69-71 ° C., the 1-bromopropane is mixed in a volume ratio of 30-50% with respect to the metal cleaner, thereby controlling the initial evaporation rate.

Hereinafter, a method of manufacturing the metal cleaner having the above-described configuration will be described in detail with reference to FIG. 1.

As shown in FIG. 1, first, activated carbon is mixed in a ratio of 100: 20 or more to 1,2-dichloropropane (S1), and then 1 to 3% of nitro ethane and 1- to the weight of 1,2-dichloropropane. Nitro propane 1-3% is further mixed to prepare a metal cleaner as a mixture (S5). As such, since 1,2-dichloropropane and the reaction stabilizing additive are mixed to form azeotropes, distillation and regeneration are possible, and reaction stability with respect to metal objects can be maximized.

 At this time, by purifying 1,2-dichloropropane through activated carbon, 1,2-dichloropropane can be stabilized at low cost. In addition, after mixing activated carbon in a ratio of 100: 20 or more to 1,2-dichloropropane, further comprising the step (S3) of lowering the residual chlorine ion concentration to 5 ppm or less through air blending, to meet the raw material specification, residual chlorine By lowering the ion concentration, it is possible to maximize the reaction stability to the metal. At this time, it is possible to maintain the moisture content below 900ppm. If the water content is more than 900 ppm, there is a problem that metal corrosion of the specification is found. Here, the mixture may further include a step (S7) of mixing dirimonene 1-3% by weight of 1,2-dichloropropane to impart a deodorizing function. In addition, 0.01 to 0.05% of the antioxidant 2,3-di-tert-butyl-P-cresol with respect to the weight of the 1,2-dichloropropane was further mixed with the mixture, thereby reducing the amount of 1,2-dichloropropane. By suppressing the decomposition to minimize the generation of residual chlorine ions it is possible to maximize the stabilization of the storage state in the container (S11).

In the above, the metal detergent by this invention and its manufacturing method were demonstrated. It will be understood by those skilled in the art that the technical features of the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

Claims (14)

90-97 wt% of 1,2-dichloropropane for cleaning the metal object;
2 to 6% by weight of a reaction stabilizing additive comprising at least one of nitro ethane and 1-nitro propane configured to stabilize the metal object; And
1-3 wt% of dilimonene, which is a deodorant which removes odor generated while cleaning the metal object; Containing, metal cleaner.
The method of claim 1,
The reaction stabilizing additive comprises 1-3% by weight of nitroethane, and 1-3% by weight of 1-nitropropane.
The method of claim 2,
The said nitro ethane has a boiling point of 114 degreeC, and functions as a low boiling point stabilizer, and the said 1-nitro propane has a boiling point of 132 degreeC, and functions as a high boiling point stabilizer.
delete The method of claim 1,
The antioxidant which prevents the oxidation of the said metal object further contains 0.01-0.05 weight% or less of 2, 3- di- tert- butyl-P-cresol, Metal cleaning agent.
The evaporation rate of the product can be controlled by mixing one of 1,1-dichloro-1-fluoroethane and 1-bromopropane with the metal cleaner of any one of claims 1 to 3 and 5. Mixed metal cleaners.
The method according to claim 6,
A mixed metal cleaner in which the 1,1-dichloro-1-fluoroethane is mixed in a volume ratio of 30 to 50% with respect to the metal cleaner.
The method according to claim 6,
A mixed metal cleaner, wherein the 1-bromopropane is mixed in a volume ratio of 30 to 50% with respect to the metal cleaner.
The method according to claim 6,
The 1,2-dichloropropane is stabilized through activated carbon, mixed metal cleaner.
Purifying by mixing activated carbon in 1,2-dichloropropane in a ratio of 100: 20 or more;
Mixing activated carbon in a ratio of 100: 20 or more in 1,2-dichloropropane and then lowering the residual chlorine ion concentration to 5 ppm or less through air blending ; And
Method for preparing a metal cleaner comprising the step of further mixing 1-3% nitro ethane and 1-3% 1-nitro propane relative to the weight of 1,2-dichloropropane.
delete The method of claim 10,
After mixing activated carbon in a ratio of 100: 20 or more to the 1,2-dichloropropane, lowering the residual chlorine ion concentration to 5 ppm or less through air blending,
Method of manufacturing a metal cleaner comprising the step of maintaining the moisture content below 900ppm.
The method of claim 10,
Further comprising a step of mixing 1-3% by weight of dirimonene 1,2 weight dichloropropane to the mixture, metal cleaner manufacturing method.
The method of claim 13,
A method of preparing a metal cleaner further comprising the step of further mixing 0.01 to 0.05% of the antioxidant 2,3-di-tert-butyl-P-cresol with respect to the 1,2-dichloropropane weight.

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