KR102461835B1 - An eco-friendly cleaning composition for industrial use - Google Patents

Abstract

An industrial cleaning agent composition of the present invention includes a first solvent and a second solvent. The first solvent is a carbonate-based solvent having a carbonate ester group, and the second solvent is a glycol ether solvent. The total solubility parameter of a mixed solvent composed of the first solvent and the second solvent is in the range of greater than 18.7 MPa^(1/2) and less than 20.4 MPa^(1/2), or a dispersion effect solubility parameter is in the range of greater than 15.5 MPa^(1/2) and less than 16.1 MPa^(1/2), the polar effect solubility parameter is greater than 3.9 MPa^(1/2) and less than 4.7 MPa^(1/2), and a hydrogen bonding effect solubility parameter is in the range of greater than 9.7 MPa^(1/2) and less than 11.6 MPa^(1/2). According to the present invention, the present invention is environmentally friendly because it is possible to avoid the application of substances that are restricted in use for environmental reasons, such as halogen compounds. The present invention also shows an excellent effect of cleaning power for various objects to be cleaned. In addition, properties such as dryness are also excellent.

Description

An eco-friendly cleaning composition for industrial use

The present invention relates to an industrial cleaning composition, and more particularly, to an industrial cleaning composition that is environmentally friendly and has excellent cleaning power.

In industrial fields such as semiconductors, electronics, automobiles, and precision parts, cleaning agents are used for the purpose of removing oil and foreign substances during processing and surface treatment of materials and parts, or for removing contamination generated in industrial parts or equipment.

As such a cleaning agent, conventional halogen compounds {eg, CFC-113 (Chloro Fluoro Carbon-113), 1.1.1-TCE (1.1.1-Tricholro Ethane))} have been used, but they are currently regulated as ozone-depleting substances (USA). See Registered Patent Publication No. US 10,731,065 B2). In addition, the use of chlorine-based cleaning agents, such as trichloroethylene (TCE), is regulated as a potential carcinogen, and hydrocarbon-based cleaning agents such as isoparaffins and naphthenes are also restricted in their use as sources of greenhouse gas.

Due to this limitation, even if the cleaning power is known, it was not easy to apply it as a cleaning agent. In particular, it has not been easy to develop a detergent having a detergency sufficient to replace the detergents subject to conventional regulations.

The present inventors have tried to develop a cleaning agent having a cleaning power comparable to that without applying a halide, which is restricted in use due to environmental reasons, and the like, and as a result, the industrial cleaning composition of the present invention has been completed.

US Patent Publication No. 10,731,065 B2, (2020. 8. 4), Specification

The technical problem of the present invention is to solve this problem, and without applying a halogen compound, it is to provide an industrial cleaning composition having excellent cleaning power.

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

As a result of the present inventor's efforts to develop a detergent having at least comparable cleaning power without applying a halogen compound, which is restricted in use due to environmental reasons, etc., by combining two specific solvents, the industrial cleaning composition of the present invention has been completed

Industrial detergent composition according to an embodiment of the present invention includes a first solvent and a second solvent, wherein the first solvent is a carbonate-based solvent having a carbonate ester group, and the second solvent is a glycol ether-based solvent, The total solubility parameter of the mixed solvent consisting of the first solvent and the second solvent exceeds 18.7 MPa ^1/2 and is less than 20.4 MPa ^1/2 , or the dispersion effect solubility parameter exceeds 15.5 MPa ^1/2 , and range less than 16.1 MPa ^1/2 , polar effect solubility parameter greater than 3.9 MPa ^1/2 and less than 4.7 MPa ^1/2 range, and hydrogen bonding effect solubility parameter greater than 9.7 MPa ^1/2 and 11.6 MPa ^1/2 It is in the range less than ² .

The present invention is environmentally friendly and exhibits an excellent effect of cleaning power by avoiding the application of substances restricted in use for environmental reasons, such as halogen compounds. In particular, it has excellent cleaning power not only for ordinary oils that are easy to treat with halogen compounds, but also for oils that are difficult to treat with halogen compounds (e.g., oils that are in a state of being in a state of being with water in a water-dispersion and/or aqueous solution state). show the effect. In addition, properties such as dryness are also excellent.

1 is a graph showing cleaning efficiency over time for Examples and Comparative Examples.
2 is a graph showing drying efficiency for Examples and Comparative Examples.
3 is a three-dimensional graph showing solubility parameters for each solvent and oil component constituting the mixed solvent.
4 is a three-dimensional graph showing solubility parameters for a mixed solvent and oil.

Advantages and features of the present invention and methods for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete and common knowledge in the art to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the claims. Like reference numerals refer to like elements throughout.

Industrial detergent composition according to an embodiment of the present invention includes a first solvent, and a second solvent. 'Industrial cleaning composition' is meant to include 'environmentally friendly industrial cleaning composition', and 'environmentally friendly' means that it does not contain halogen compounds that are restricted in use for environmental reasons. The environmental reason may be, for example, the reason that it is an ozone-depleting substance, the reason that it is a global warming substance, and/or the reason that it is a substance that is hazardous to humans. That is, the eco-friendly industrial cleaning composition is a cleaning composition that does not contain a halogen compound, and means an industrially usable cleaning composition. The first solvent is a carbonate-based solvent having a carbonate ester group, and the second solvent is a glycol ether-based solvent. In addition, in one embodiment of the present invention, the total solubility parameter of the mixed solvent consisting of the first solvent and the second solvent is in the range of exceeding 18.7 MPa ^1/2 and less than 20.4 MPa ^1/2 , or the dispersion effect solubility parameter is A range exceeding 15.5 MPa ^1/2 and less than 16.1 MPa ^1/2 , a polar effect solubility parameter exceeding 3.9 MPa ^1/2 and less than 4.7 MPa ^1/2 range, and a hydrogen bonding effect solubility parameter being 9.7 MPa ^{1/ 2} is in the range exceeding and less than 11.6 MPa ^1/2 . Preferably, the total solubility parameter of the mixed solvent is 19.2 to 19.9 MPa ^1/2 , or the dispersion effect solubility parameter is 15.7 to 15.9 MPa ^1/2 , the polar effect solubility parameter is 4.1 to 4.5 MPa ^1/2 , , the hydrogen bonding effect solubility parameter is 10.3 to 11.0 MPa ^1/2 . That is, an embodiment of the present invention includes a carbonate-based solvent and a glycol ether-based solvent having a carbonate ester group, and the total solubility parameter of a mixed solvent consisting of a carbonate-based solvent and a glycol ether-based solvent having a carbonate ester group is within the above range or the dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter have the same ranges as above. As supported by the experimental examples, it can be seen that the exemplary embodiment of the present invention exhibits excellent cleaning power comparable to that without applying a conventional halogen compound, which is limited in use for environmental reasons. Furthermore, it is also possible to clean oils that are difficult or impossible to clean with halogen compounds (eg, oils that exist with water in a water-dispersion and/or aqueous solution state). In addition, properties such as dryness are also excellent.

Each of the dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter can be calculated by Equations 1-1 to 1-3. In Equations 1-1 to 1-3, Ø _i ,δ _di ,δ _pi ,δ _hi is the volume ratio of each of the first solvent or the second solvent, the dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect The solubility parameter is represented, and δ _d , δ _p , δ _h respectively represent the dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter of the mixed solvent.

[Equation 1-1]

[Equation 1-2]

[Equation 1-3]

As in Equations 1-1 to 1-3, the volume ratio (Ø _i ) and dispersion effect solubility parameter, polar effect solubility parameter, and hydrogen bonding effect solubility parameter (δ _di ,δ of each solvent constituting the mixed solvent) From _pi ,δ _hi ), the dispersion effect solubility parameter (δ _d ), the polar effect solubility parameter (δ _p ), and the hydrogen bonding effect solubility parameter (δ _h ) of the mixed solvent can be calculated.

The dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter of each of the first and second solvents were published in Dr. It can be calculated using the Hansen Solubility Parameter (HSP) proposed by C. Hansen, or a known value can be used. For example, Dr. who proposed HSP. Using the Hansen Solubility Parameter in Practice (HSPiP) program developed by Hansen Group, dispersion effect solubility parameters, polar effect solubility parameters, and hydrogen bonding effect solubility parameters can be calculated for each solvent. The Hansen solubility parameter describes the degree of bonding in a substance: (1) solubility parameters resulting from non-polar dispersion bonds, (2) solubility parameters resulting from polar bonds due to permanent dipoles, and (3) solubility parameters resulting from hydrogen bonding. It is considered subdivided into solubility parameters, because (1), (2), and (3) each correspond to the dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter of the present invention.

On the other hand, according to Hildebrand's theory that it is expressed as a function of binding energy, which is the dispersion force between compound structures, based on the solubility parameter expressed by Equation A, Dr. Hansen estimated the solubility parameter as shown in Equation B below by adding polarity and hydrogen bonding forces to the total cohesive energy in addition to the dispersing force.

[Formula A]

δ=(E/V) ^1/2

In Equation A, δ is a solubility parameter, E is a cohesive energy, and V is a molar volume. The unit of δ is (cal/cm ³ ) ^1/2 =2.046×10 ^-3 (J/m ³ ) ^1/2 =2.046(MPa) ^1/2 .

[Formula B]

Ecoh=Ed+Ep+Eh

In Equation B, Ecoh is the total cohesive energy, Ed is the polar force, Ep is the polar force, and Eh is the hydrogen bonding force.

The dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter of the present invention can be expressed as a vector having a direction in three-dimensional space, and the size of the vector can be determined as the total solubility parameter.

Therefore, the total solubility parameter (δ _t ) can be determined by Equation 2.

[Equation 2]

Equation 2 can also be derived from Equations A and B as follows.

Ecoh/V=Ed/V+Ep/V+Eh/V=δ _d ² +δ _p ² +δ _h ² =δ _t ²

The first solvent, which is one of the respective solvents constituting the mixed solvent, has a total solubility parameter of 18.0 to 18.7 MPa ^1/2 , or a dispersion effect solubility parameter of 15.5 to 16.6 MPa ^1/2 , and a polar effect solubility parameter 3.1 to 3.9 MPa ^1/2 , and the hydrogen bonding effect solubility parameter may be 6.1 to 9.7 MPa ^1/2 .

In addition, the second solvent, which is another solvent constituting the mixed solvent, has a total solubility parameter of 20.0 to 22.2 MPa ^1/2 or a dispersion effect solubility parameter of 15.4 to 16.1 MPa ^1/2 , and a polar effect solubility parameter is 4.7 to 8.0 MPa ^1/2 , and the hydrogen bonding effect solubility parameter may be 11.2 to 13.1 MPa ^1/2 .

At this time, the dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter for each of the first and second solvents are calculated using Hansen Solubility Parameter (HSP) or are already known. value can be used. In addition, the total solubility parameter for each of the first solvent and the second solvent can also be calculated by substituting the dispersion effect solubility parameter, the polar effect solubility parameter, and the hydrogen bonding effect solubility parameter for each in Equation 2.

The carbonate-based solvent having a carbonate ester group corresponding to the first solvent included in an embodiment of the present invention is not limited thereto, unless it is subject to regulation for environmental reasons, for example, dimethyl carbonate, and diethyl carbonate It may include one or more selected from among. In addition, the glycol ether-based solvent corresponding to the second solvent is not limited thereto, unless it is regulated for environmental reasons, for example, propylene glycol methyl ether, dipropylene glycol methyl ether, propylene glycol ene-propyl ether , or may include one or more selected from ethylene glycol propyl ether. More preferably, the carbonate-based solvent having a carbonate ester group may be dimethyl carbonate, and the glycol ether-based solvent may be propylene glycol methyl ether.

Each of the first solvent and the second solvent may have a boiling point of preferably 300 degrees Celsius or less, more preferably less than 200 degrees Celsius, and even more preferably 91 degrees to 185 degrees Celsius. Both the first solvent and the second solvent have the same boiling point in this range and have a relatively high boiling point. As a result of the first solvent and the second solvent having boiling points in the same range, they are dried uniformly in the drying process after washing and the drying efficiency is excellent. In addition, it is possible to avoid discoloration or staining of the surface of the object to which the cleaning composition was applied in the drying process after washing. In addition, when the cleaning composition is regenerated and recovered by the distillation method after washing, the first solvent and the second solvent are not separated from each other in the distillation process, but can be recovered as a mixture, which is advantageous in terms of regeneration. In addition, since both the first solvent and the second solvent have a relatively high boiling point, the risk of flammability during cleaning operation can also be avoided. In addition, the first solvent and the second solvent may each preferably have a viscosity of 3.0 cPs or less, and a surface tension of 27.0 dyne/cm or less. As such, since both the first solvent and the second solvent show relatively low values of viscosity and surface tension, penetrating power to the object to be cleaned is good and cleaning efficiency is improved.

In addition, each of the first solvent and the second solvent may have a kauri-butanol value of preferably 70 or more, more preferably 70 to 500, and still more preferably 70 to 400. The kauri-butanol value is the amount (ml) of the solvent added until it becomes cloudy while dropping the solvent into 20 ml of the natural resin Kaurigum 20%-butanol solution. The ability to dissolve is considered to be great. Specifically, the kauri-butanol value may be measured according to ASTM D1113, and may be a value known through literature and the like. Since both the first and second solvents constituting the mixed solvent have high kauri-butanol values, it can be seen that the object to be cleaned can be more effectively dissolved.

As such, in one embodiment of the present invention, since both the first and second solvents constituting the mixed solvent have specific boiling points, viscosity, surface tension, and/or kauri-butanol values in the same range, the cleaning power is superior And it can be seen that properties such as dryness and safety are also excellent.

The volume ratio of the second solvent to the first solvent (second solvent volume/first solvent volume) is not limited thereto, but may be, for example, 0.1 to 10, preferably 0.43 to 2.3, more preferably 0.43 to 0.98, even more preferably 0.68 to 0.98. This is because the cleaning property is excellent at such a volume ratio and the drying property is also excellent.

In addition, in an embodiment of the present invention, the first solvent is, for example, 9.98 to 90% by volume, preferably 9.9 to 90% by volume, more preferably 9.8 to 90% by volume, even more preferably 9.4 to 90% by volume. It may be a volume % content. In addition, the second solvent in one embodiment of the present invention is also, for example, 9.98 to 90% by volume, preferably 9.9 to 90% by volume, more preferably 9.8 to 90% by volume, even more preferably 9.4 to 90% by volume. It may be a volume % content.

One embodiment of the present invention may further include 1-methyl piperazine. 1-methylpiperazine can prevent surface discoloration or oxidative corrosion of the object to which the cleaning composition is applied. In addition, corrosion that may occur due to changes in the structures (e.g., carbonate ester bond structure, ether structure) of the first solvent and the second solvent caused by the material contained in the object to be cleaned is also shown to be inhibited by 1-methyl piperazine. see. Since such 1-methyl piperazine is also not a regulated substance, an embodiment of the present invention corresponds to an eco-friendly cleaning agent.

The content of 1-methyl piperazine is not limited as long as it has such an action, but 1-methyl piperazine in an embodiment of the present invention may be, for example, 0.01 to 5.0 vol%. In one embodiment of the present invention, 1-methyl piperazine may be included in an amount of preferably 0.05 to 5.0% by volume, more preferably 0.1 to 3.0% by volume, and still more preferably 0.3 to 3.0% by volume.

In addition, one embodiment of the present invention may further include one or more selected from 1,3-dioxolane or a derivative thereof. 1,3-Dioxolane (1,3-Dioxolane) and / or its derivatives can ensure more stability of the detergent. Such stability appears to be achieved by suppressing deterioration of the detergent, particularly in the process of distilling and regenerating the detergent. Since such 1,3-dioxolane and/or its derivatives are also not subject to regulation, an embodiment of the present invention corresponds to an eco-friendly cleaning agent.

The content of 1,3-dioxolane and/or its derivatives is not limited as long as they have such an action, but in one embodiment of the present invention, 1,3-dioxolane (1,3) -Dioxolane) and/or its derivative may be, for example, in an amount of 0.01 to 5.0% by volume. 1,3-Dioxolane and/or its derivatives in one embodiment of the present invention are preferably 0.05 to 5.0% by volume, more preferably 0.1 to 3.0% by volume, even more Preferably, it may be included in an amount of 0.3 to 3.0 vol%.

1,3-dioxolane derivatives include, for example, 2-methyl-1,3-dioxolane, 4-methyl-1,3-dioxolane, 5-methyl-1,3-dioxolane, 2-ethyl-1,3-dioxolane, 4-ethyl-1,3-dioxolane, 5-ethyl-1,3-dioxolane, 2,2-dimethyl-1,3-dioxolane, 4,4-dimethyl-1, 3-dioxolane, 5,5-dimethyl-1,3-dioxolane, 2,4-dimethyl-1,3-dioxolane, 2,5-dimethyl-1,3-dioxolane, 2,2-diethyl-1,3- dioxolane, 4,4-diethyl-1,3-dioxolane, 5,5-diethyl-1,3-dioxolane, 2,4-diethyl-1,3-dioxolane, 2,5-diethyl-1,3-dioxolane, 2-methyl-2-ethyl-1,3-dioxolane, 2-methyl-4-ethyl-1,3-dioxolane, 2-methyl-5-ethyl-1,3-dioxolane, 2-ethyl-4-methyl- It may be at least one selected from 1,3-dioxolane, and 2-ethyl-5-methyl-1,3-dioxolane.

An embodiment of the present invention is not limited thereto, but preferably has a total solubility parameter of 0.8 to 1.7 MPa ^1/2 with a deviation from the total solubility parameter of the mixed solvent, or a dispersion effect solubility parameter of the mixed solvent Dispersion effect solubility parameter with deviation of 0.7 to 1.7 MPa ^1/2 , polar effect solubility parameter with deviation of 0.4 to 1.3 MPa ^1/2 from mixed solvent solubility parameter, and hydrogen bonding effect solubility of mixed solvent It may be for cleaning an object to be cleaned containing an oil having a hydrogen bonding effect solubility parameter with a deviation from the parameter of 1.4 to 5.4 MPa ^1/2 . This is because the cleaning effect can be more effectively exhibited on such an object to be cleaned. This is also confirmed from experimental examples. The object to be cleaned is not limited as long as it contains oil, but for example, an oil in an independent state or an oil in a state present with water (eg, in a state of being dispersed in water and/or dissolved in water, a state present with water) of oil) and the like. The fraction may preferably have such a value, but is not limited thereto. For example, the oil may originate from one or more selected from mineral oil or biodiesel.

Hereinafter, the present invention will be described in more detail by way of experimental examples, examples and comparative examples, but the following examples are only for illustrating the present invention and the content of the present invention is not limited by the following examples.

<Experimental Example 1> Experiment to confirm the effect of industrial detergent composition

1-1. Preparation of Examples and Comparative Examples

By mixing each component in the content shown in Table 1 below, Examples 1 to 5 were prepared. Specifically, dimethyl carbonate (SLC Co. Ltd, China) and propylene glycol methyl ether {Dow Chemical (USA), Hannong Chemical (Korea)} were stirred at room temperature for 30-40 minutes with an impeller stirrer, and then 1,3-diox Solein (Lambiotte & Cie, Belgium) and 1-methyl piperazine (Daejeong Chemical Co., Ltd.) were sequentially added dropwise and stirred at room temperature for 30 to 40 minutes. In addition, trichloroethylene (TCE), which is a conventionally used chlorine-based detergent, was prepared in Comparative Example 1, and methylene chloride (MC) was prepared in Comparative Example 2. In addition, dimethyl carbonate was prepared in Comparative Example 3, and propylene glycol methyl ether was prepared in Comparative Example 4.

Detergent composition and composition ratio (volume %) Example 1 Example 2 Example 3 Example 4 Example 5 dimethyl carbonate 69 59 50 40 30 Propylene glycol methyl ether 30 40 49 59 69 1,3-dioxolane 0.5 0.5 0.5 0.5 0.5 1-methyl piperazine 0.5 0.5 0.5 0.5 0.5

1-2. Cleaning Effect Confirmation Experiment

First, automobile brake parts contaminated with calcined punching oil were prepared as objects for cleaning. The prepared cleaning object was cleaned with an immersion ultrasonic cleaner (28KHz, 600W). At this time, as the cleaning solution, Examples and Comparative Examples prepared in 1-1. were used, and the oil removal rate was measured for each time period shown in Table 2. The results are shown in Table 2 and FIG. 1 . 1 is a graph showing cleaning efficiency over time for Examples and Comparative Examples. In FIG. 1, the x-axis represents time (minutes), and the y-axis represents cleaning efficiency (%). As shown in Table 2 and FIG. 1, it can be seen that, in all examples, when 6 minutes elapsed, 100% cleaning efficiency was exhibited in the same manner as in Comparative Examples 1 and 2. In fact, in the cleaning process, it can be seen that all of the examples of the present invention exhibit comparable effects to conventionally used halogen compound cleaning agents, considering that the cleaning process generally takes 10 to 18 minutes. Therefore, it can be seen that the present invention is not only excellent in detergency to the extent that it can replace substances restricted in use for environmental reasons, such as halogen compounds, but is also environmentally friendly because the constituents are not subject to regulation. On the other hand, in the case of Comparative Examples 3 to 4 corresponding to each solvent constituting the Examples, it can be seen that not only does not show 100% cleaning efficiency even if the cleaning time is extended, but also does not reach 70%. In this case, there is a limit to applying it as a cleaning agent in the actual field. From these results, it can be seen that as a result of combining two types of solvents that are difficult to substantially apply as a cleaning agent, application as a cleaning agent is possible.

Cleaning efficiency (%) Cleaning time (minutes) One 2 3 4 5 6 7 8 9 10 Comparative Example 1 80 90 95 100 100 100 100 100 100 100 Comparative Example 2 80 95 100 100 100 100 100 100 100 100 Comparative Example 3 50 50 60 60 60 60 65 65 65 65 Remark example 4 30 30 40 40 50 50 50 50 50 50 Example 1 75 85 95 100 100 100 100 100 100 100 Example 2 85 95 100 100 100 100 100 100 100 100 Example 3 80 90 100 100 100 100 100 100 100 100 Example 4 70 80 90 95 100 100 100 100 100 100 Example 5 70 75 85 90 95 100 100 100 100 100

1-3. Drying Effect Confirmation Experiment

First, a secondary battery can (CAN) (Beomcheon Precision Co., Ltd.) contaminated with drawing oil was prepared as an object for cleaning. For the prepared cleaning object, cleaning was performed for 1 to 10 minutes at a cleaning solution temperature of 15 to 20° C. in a vacuum ultrasonic cleaning tank (BYT-600W). After cleaning, the cleaning object was dried (10 Torr, 60±3° C.) in a drying tester (10 Torr vacuum dryer), and the drying efficiency was measured for each time shown in Table 3. The results are shown in Table 3 and FIG. 2 . 2 is a graph showing drying efficiency for Examples and Comparative Examples. In FIG. 2, the x-axis represents time (minutes), and the y-axis represents drying efficiency (%). As shown in Table 3 and FIG. 2, it can be seen that all of the examples were 100% dried after 4 to 7 minutes. In fact, considering that the drying process takes 5 to 8 minutes, it can be seen that the present invention is effective enough to be sufficiently applied to the actual field.

Drying efficiency (%) Drying time (minutes) One 2 3 4 5 6 7 8 9 10 Example 1 90 95 98 100 100 100 100 100 100 100 Example 2 80 90 97 99 100 100 100 100 100 100 Example 3 75 80 85 90 100 100 100 100 100 100 Example 4 40 60 80 85 90 100 100 100 100 100 Example 5 30 40 60 70 80 90 100 100 100 100

1-4. 1-methylpiperazine effect confirmation experiment

Examples 1 to 5 were prepared in the same manner as in 1-1., and Examples 6 and 7 were prepared with the components and compositions shown in Table 4 below.

Detergent components and composition ratio (volume %) Example 6 Example 7 dimethyl carbonate 79 20 Propylene glycol methyl ether 20 79 1,3-dioxolane 0.5 0.5 1-methyl piperazine 0.5 0.5

In addition, modified examples for Examples 1 to 7 were prepared with the compositions described in the table below. A modification is to change the content of 1-methyl piperazine in Examples 1 to 7, and change the content of dimethyl carbonate or propylene glycol methyl ether according to the change in the content of 1-methyl piperazine. For convenience, the content of 1-methyl piperazine is described in the table. However, in reality, when the content of 1-methyl piperazine is increased based on Examples 1 to 7, the content of components having a high content in dimethyl carbonate or propylene glycol methyl ether is decreased by the increased amount, and the content of dimethyl carbonate and propylene glycol methyl ether is decreased. When the content was the same, the content of propylene glycol methyl ether was reduced. In addition, when the content of 1-methyl piperazine is reduced based on Examples 1 to 7, the content of the component having a small content in dimethyl carbonate or propylene glycol methyl ether is increased as much as the content is decreased, and the content of dimethyl carbonate and propylene glycol methyl ether is increased. In the same case, the content of dimethyl carbonate was increased. In Table 5, examples in which the content of 1-methyl piperazine is 0.5% by volume corresponds to Examples 1 to 7, and the rest corresponds to modified examples.

Drawing oil and hydrochloric acid (0.01% by volume) were added to each of the prepared Examples 1 to 7 and modified examples, and after 72 hours at 30 degrees Celsius, the state was observed. For each sample, there was no change in appearance (◎), almost no change (○), slightly cloudy (Δ), and completely discolored (X). At this time, a slightly cloudy case indicates a case of discoloration of 1% or more. Table 5 shows the determination results.

1-Methyl piperazine (vol%) Example 1 and
variation Example 2 and
variation Example 3 and
variation Example 4 and
variation Example 5 and
variation Example 6 and
variation Example 7 and
variation 0 X X X X X X X 0.01 X X X Δ Δ X Δ 0.05 ○ ○ Δ Δ Δ Δ ◎ 0.1 ◎ ◎ ◎ ◎ ○ ○ ◎ 0.3 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 0.5 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 0.7 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 1.0 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 2.0 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 3.0 ◎ ◎ ◎ ◎ ◎ ◎ ◎

As shown in Table 5, it can be seen that the discoloration is prevented by 1-methyl piperazine. In particular, it can be seen that oxidative corrosion caused by acids such as hydrochloric acid and discoloration caused thereby are prevented. At this time, corrosion that may occur due to changes in the structures (eg, carbonate ester bond structure, ether structure) of the first and second solvents caused by substances contained in the object to be cleaned, such as oil, is also applied to 1-methyl piperazine. appears to be inhibited by It can be seen that when the 1-methylpiperazine content is 0.05 vol% or more, such an effect is more pronounced. Since such 1-methyl piperazine is also not a regulated substance, the detergent of the present invention corresponds to an eco-friendly detergent.

1-5. Experiment to confirm the effect of 1,3-dioxolane (1,3-Dioxolane)

Examples 1 to 1 in the same manner as in 1-4, except that the content of 1,3-dioxolane was changed to the content shown in Table 6 instead of the content of 1-methylpiperazine Example 7 and variants were prepared.

For each of the prepared Examples 1 to 7 and the modified examples, the drawing oil was added so as to have a content of 10% of the total volume, and after continuous heating at 100 to 130 degrees Celsius for 72 hours, the viscosity, specific gravity, and cleaning power were compared with those before heating. We found out the degree of change. For each sample, there was no change (double-circle), almost no change (circle), slightly altered (Δ), and completely altered (X). At this time, in the case of slight deterioration, a change of 10% compared to before heat treatment was used as the standard. The determination results are shown in Table 6.

1,3-dioxolane
(volume%) Example 1 and
variation Example 2 and
variation Example 3 and
variation Example 4 and
variation Example 5 and
variation Example 6 and
variation Example 7 and
variation 0 X X Δ Δ Δ X Δ 0.01 Δ Δ Δ Δ Δ X Δ 0.05 ○ ○ ○ ○ ○ Δ ◎ 0.1 ◎ ◎ ◎ ◎ ◎ ○ ◎ 0.3 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 0.5 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 0.7 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 1.0 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 2.0 ◎ ◎ ◎ ◎ ◎ ◎ ◎ 3.0 ◎ ◎ ◎ ◎ ◎ ◎ ◎

As shown in Table 6, it can be seen that the detergent can secure more stability by 1,3-dioxolane. Such stability seems to be achieved by suppressing deterioration of the detergent even in the process of distilling and regenerating the detergent at 100 to 130 degrees Celsius, in particular. In addition, it can be seen that the first solvent and the second solvent are not separated, and stability is maintained even in the distillation regeneration process. That is, it can be seen that an embodiment of the present invention is a detergent composition in which stability is secured not only in storage and use conditions, but also in the distillation and regeneration process. Since such 1,3-dioxolane is also not a material subject to regulation, the detergent of the present invention corresponds to an eco-friendly detergent.

1-6. Experiments to confirm the cleaning effect on various oils

First, the automobile brake pads (Mando) contaminated with punching oil (mineral oil, Kukdong Petrochemical Co., Ltd. ACRO PN 1010DW) or cutting oil (water dispersible oil, SHL SAMSOL A7H Co., Ltd.) were targeted for cleaning. prepared. Cleaning (20±3°C, immersion time 180 seconds) was performed with a sump type ultrasonic cleaner (BYT-600W) for the prepared cleaning object. At this time, as the cleaning solution, Examples and Comparative Examples prepared in 1-1. The results are shown in Table 7. As shown in Table 7, it can be seen that all of the examples can be cleaned with 100% efficiency not only for purely oily oils, but also for oils that exist together with water. However, in the case of the halogen compound as a comparative example, it did not show a cleaning effect on the oil in the state that it was present together with water. From these results, the present invention provides not only conventional oils that are easy to treat with halogen compounds, but also oils that are difficult to treat with halogen compounds (eg, oils that exist with water in a water-dispersion and/or aqueous solution state). It can be seen that the cleaning power is also excellent.

Cleaning efficiency (%) water dispersible oil mineral oil Comparative Example 1 10 100 Comparative Example 2 20 100 Example 2 100 100 Example 3 100 100

Hereinafter, for such an excellent cleaning composition, analysis was performed using theoretical knowledge.

1-6. Detergent Analysis

First, Examples 1 to 7 are a carbonate-based solvent having a carbonate ester group (eg, dimethyl carbonate, or diethyl carbonate) and a glycol ether-based solvent (eg, propylene glycol methyl ether, dipropylene glycol methyl ether, propylene glycol ene -propyl ether, or ethylene glycol propyl ether) as the first solvent and the second solvent. Since such a solvent is not subject to regulation for environmental reasons, etc., the cleaning composition of the present invention including such a solvent can be called an eco-friendly cleaning composition.

Although the first solvent and the second solvent are mixed solvents, it can be seen from the experimental results that the mixed state is maintained, and the stability is maintained even during drying and distillation and regeneration, and the cleaning power is excellent. The reasons for such characteristics were analyzed using theoretical knowledge. Specifically, knowledge related to cleaning agents {1967, Dr. Analysis was performed using the knowledge of Hansen Solubility Parameter (HSP) proposed by C. Hansen.

First, with respect to the carbonate-based solvent and the glycol ether-based solvent having a carbonate ester group, the boiling point, kauri-butanol value, and solubility parameters are shown in Table 8 below. In Table 8, the boiling point and kauri-butanol values are values published in well-known literature or the Internet, and the dispersion effect solubility parameter (δ _d ), the polar effect solubility parameter (δ _p ), and the hydrogen bonding effect solubility parameter ( δ _h ) is a calculated value calculated using the HSPiP (Hansen Solubility Parameter in Practice) program or a value published in well-known literature or the Internet, and the total solubility parameter (δ _t ) is a value calculated by Equation 2. (See www.hansen-solubility.com; www.dow.com; DOW Oxygenated Solvents, The Dow Chemical Company, Published January 2006)

All of the carbonate-based solvents and glycol ether-based solvents having a carbonate ester group described in Table 8 have a boiling point of 300 degrees Celsius or less, a certain range, and a kauri-butanol value of 70 or more. In addition, since all the solvents listed in the table have a viscosity of 3.0 cPs or less and a surface tension of 27.0 dyne/cm or less, it can be seen that the penetrating power to the object to be cleaned is good and the cleaning efficiency is good. As such, since both the carbonate-based solvent and the glycol ether-based solvent having a carbonate ester group constituting the mixed solvent have a specific boiling point, viscosity, surface tension, and/or kauri-butanol value in the same range, the cleaning power is excellent, Characteristics such as dryness and safety are also excellent.

Boiling point, KB value and solubility parameters for each solvent solvent Boiling Point (℃) KB value δd
(MPa ^1/2 ) δp
(MPa ^1/2 ) δh
(MPa ^1/2 ) δt
(MPa ^1/2 ) Dimethylcarbonate 91 200 15.5 3.9 9.7 18.7 Diethylcarbonate 128 70 16.6 3.1 6.1 18.0 Propyleneglycol Methyl Ether 120 400 16.1 4.7 11.6 20.4 Propyleneglycol n-propyl Ether 149 100 15.4 5.6 12.0 20.3 Dipropylene glycol Methyl Ether 185 400 15.5 5.7 11.2 20.0 Ethylene glycol Propyl Ether 151 100 16.1 8.0 13.1 22.2

In addition, the dispersion effect solubility parameter (δ _d ), the polar effect solubility parameter (δ _p ), and the hydrogen bonding effect solubility parameter (δ _h ) for each solvent described in Table 8 are shown in FIG. 3 as a three-dimensional graph. . At this time, for comparison, the dispersion effect solubility parameter (δ _d ), the polar effect solubility parameter (δ _p ), and the hydrogen bonding effect solubility parameter (δ _h ) for the oil to be cleaned (mineral oil, biodiesel oil) for comparison ) is also shown.

For reference, the dispersion effect solubility parameter (δ _d ), the polar effect solubility parameter (δ _p ), the hydrogen bonding effect solubility parameter (δ _h ) and the total solubility parameter (δ _t ) for the oil to be cleaned are It is shown in Table 9 below (AFMBarton, CRC Handbook of solubility parameters and other cohesion parameters, FL, 1983, Table 9, p167; Naphthenic oils advantageous in grease making, Naphthenics Magazine, Nynas Co., 1(1), 2006, p14~ 15; January 2015, Journal of the American Oil Chemists' Society 92(1):95-109). The reason for choosing mineral oil and biodiesel oil as the oil component is that mineral oil and biodiesel oil are representative examples of oil components. because it has similar characteristics to

Solubility parameters for oil oil δd
(MPa ^1/2 ) δp
(MPa ^1/2 ) δh
(MPa ^1/2 ) δt
(MPa ^1/2 ) Mineral Oil 17.4 3.0 5.3 18.4 Biodiesel Oil 15.0 3.7 8.9 17.9

3 is a three-dimensional graph showing solubility parameters for each solvent and oil component constituting the mixed solvent. Referring to Table 8 and Figure 3, the carbonate-based solvent having a carbonate ester group has a total solubility parameter of 18.0 to 18.7 MPa ^1/2 , a dispersion effect solubility parameter of 15.5 to 16.6 MPa ^1/2 , and a polar effect solubility parameter It can be seen that is 3.1 to 3.9 MPa ^1/2 , and the hydrogen bonding effect solubility parameter is 6.1 to 9.7 MPa ^1/2 . In addition, the glycol ether-based solvent has a total solubility parameter of 20.0 to 22.2 MPa ^1/2 , a dispersion effect solubility parameter of 15.4 to 16.1 MPa ^1/2 , and a polar effect solubility parameter of 4.7 to 8.0 MPa ^1/2 , and , it can be seen that the hydrogen bonding effect solubility parameter is 11.2 to 13.1 MPa ^1/2 . It can be seen that carbonate-based solvents and glycol ether-based solvents having such carbonate ester groups exhibit solubility parameter distribution adjacent to oil. Hereinafter, a component representing each of the carbonate-based solvent and glycol ether-based solvent having a carbonate ester group was selected, and solubility parameters were calculated based on mixed solvents mixed to have different composition ratios. Such a configuration ratio considers the configuration ratios of Examples 1 to 5. The dispersion effect solubility parameter (δ _d ), the polar effect solubility parameter (δ _p ), and the hydrogen bonding effect solubility parameter (δ _h ) of the mixed solvent were calculated using Equations 1-1 to 1-3, and the total solubility The parameter (δ _t ) was calculated by Equation 2. Each component and content is shown in Table 10, and solubility parameters for each mixed solvent are shown in Table 11. In addition, the dispersion effect solubility parameter (δ _d ), the polar effect solubility parameter (δ _p ), and the hydrogen bonding effect solubility parameter (δ _h ) for the mixed solvent and oil component are shown in 3D graph in FIG. 4 . 4 is a three-dimensional graph showing solubility parameters for a mixed solvent and oil.

Mixed solvent components and composition ratio (volume %) (DMC) Dimethylcarbonate: “A”
(PM) Propyleneglycol Monomethyl Ether : “B” DP-1

“A” 70%

“B” 30% DP-2 60% 40% DP-3 50% 50% DP-4 40% 60% DP-5 30% 70%

Solubility parameters of first solvent, second solvent and mixed solvent (MPa ^1/2 ) solvent δd δp δh δt DMC 15.5 3.9 9.7 18.7 PM 16.1 4.7 11.6 20.4 DP-1 15.7 4.1 10.3 19.2 DP-2 15.7 4.2 10.5 19.4 DP-3 15.8 4.3 10.7 19.6 DP-4 15.9 4.4 10.8 19.7 DP-5 15.9 4.5 11.0 19.9

As shown in Table 11 and Figure 4, the total solubility parameter of the mixed solvent is 19.2 to 19.9 MPa ^1/2 , the dispersion effect solubility parameter is 15.7 to 15.9 MPa ^1/2 , and the polar effect solubility parameter is 4.1 to 4.5 MPa ^1/2 , and it can be seen that the hydrogen bonding effect solubility parameter is 10.3 to 11.0 MPa ^1/2 . At this time, the total solubility parameters of dimethyl carbonate and propylene glycol monomethyl ether constituting the mixed solvent (18.7 MPa ^1/2 , 20.4 MPa ^1/2 ), dispersion effect solubility parameters (15.5 MPa ^1/2 , 16.1 MPa) ^1/2 ), polar effect solubility parameter (3.9 MPa ^1/2 , 4.7 MPa ^1/2 ), hydrogen bonding effect solubility parameter (9.7 MPa ^1/2 , 11.6 MPa ^1/2 ), preferably The total solubility parameter of the mixed solvent is in the range of more than 18.7 MPa ^1/2 and less than 20.4 MPa ^1/2 , or the dispersion effect solubility parameter is in the range of more than 15.5 MPa ^1/2 and less than 16.1 MPa ^1/2 , the polar effect The solubility parameter is in the range of more than 3.9 MPa ^1/2 and less than 4.7 MPa ^1/2 , and the hydrogen bonding effect solubility parameter is in the range of more than 9.7 MPa ^1/2 and less than 11.6 MPa ^1/2 , and in this range It can be seen that an excellent cleaning effect and the like are exhibited. Comparative Example 3 having solubility parameter values adjacent to this range (total solubility parameter 18.7 MPa ^1/2 , dispersion effect solubility parameter 15.5 MPa ^1/2 , polar effect solubility parameter 3.9 MPa ^1/2 , hydrogen bonding effect Corresponds to a solvent with a solubility parameter of 9.7 MPa ^1/2 ) to Comparative Example 4 (total solubility parameter 20.4 MPa ^1/2 , dispersion effect solubility parameter 16.1 MPa ^1/2 , polar effect solubility parameter 4.7 MPa ^{1/2 )} , hydrogen bonding effect, corresponding to a solvent with a solubility parameter of 11.6 MPa ^1/2 .)

In addition, it can be seen that the solubility parameter of such a mixed solvent exhibits a relatively similar value to the solubility parameter of the object to be cleaned (oil). As a result of having a similar solubility parameter as described above, it can be expected that the mixed solvent and the object to be cleaned are better mixed, and thus excellent cleaning power. This is also supported by the previous experimental results. Hereinafter, the similarity of the solubility parameters of the mixed solvent and the object to be cleaned was mathematically analyzed. Specifically, as shown in Equations 3-1 to 3-4, the difference between solubility parameters (total solubility parameter, dispersion effect solubility parameter, polar effect solubility parameter, hydrogen bonding effect solubility parameter) between the mixed solvent and oil fraction According to the method expressed in absolute values. In Equations 3-1 to 3-4, δ _d1 , δ _p1 , δ _h1 , δ _t1 are the dispersion effect solubility parameter, the polar effect solubility parameter, the hydrogen bonding effect solubility parameter of the detergent (eg, mixed solvent), respectively; represents the total solubility parameter, and δ _d2 , δ _p2 , δ _h2 , δ _t2 are the dispersion effect solubility parameter, the polarity effect solubility parameter, the hydrogen bonding effect solubility parameter, and the total solubility of the object to be cleaned (eg oil), respectively. Indicates parameters. In addition, Δδ _d , Δδ _p , Δδ _h , and Δδ _t represent the similarity of the solubility parameter of the dispersion effect, the similarity of the solubility parameter of the polar effect, the similarity of the solubility parameter of the hydrogen bonding effect, and the similarity of the total solubility parameter, respectively.

[Equation 3-1]

Δδ _d = │δ _d1 ^― δ _d2 │

[Equation 3-2]

Δδ _p = │δ _p1 ^― δ _p2 │

[Equation 3-3]

Δδ _h = │δ _h1 ^― δ _h2 │

[Equation 3-4]

Δδ _t = │δ _t1 ^― δ _t2 │

Table 12 shows the results of analysis by Equations 3-1 to 3-4.

Mixed solvent/oil Δδ _d
(MPa ^1/2 ) Δδ _p
(MPa ^1/2 ) Δδ _h
(MPa ^1/2 ) Δδ _t
(MPa ^1/2 ) DP-1/Mineral Oil 1.7 1.1 5.0 0.8 DP-1/Bio Diesel Oil 0.7 0.4 1.4 1.3 DP-3/Mineral Oil 1.6 1.3 5.4 1.2 DP-3/Bio Diesel Oil 0.8 0.6 1.8 1.7

As shown in Table 12, it can be seen that the solubility parameter similarity between the mixed solvent and the object to be cleaned (oil) is very high. That is, the object to be cleaned has a total solubility parameter of 0.8 to 1.7 MPa ^1/2 with a deviation from the total solubility parameter of the mixed solvent, and a dispersion effect solubility parameter with a deviation of 0.7 to 1.7 MPa ^1/2 of the mixed solvent. Dispersion effect solubility parameter, the polar effect solubility parameter of the mixed solvent and the polar effect solubility parameter with a deviation of 0.4 to 1.3 MPa ^1/2 , and the hydrogen bonding effect solubility parameter of the mixed solvent with a deviation of 1.4 to 5.4 MPa ^{1/ 2} may contain fractions having a hydrogen bonding effect solubility parameter. It can be seen that such an object to be cleaned can be more effectively cleaned by the cleaning composition of the present invention, as confirmed from the experimental results above.

From the above experimental results, the total solubility parameter of the mixed solvent comprising the carbonate-based solvent and the glycol ether-based solvent having a carbonate ester group and the carbonate-based solvent and the glycol ether-based solvent having a carbonate ester group exceeds 18.7 MPa ^1/2 and is less than 20.4 MPa ^1/2 , or the dispersion effect solubility parameter exceeds 15.5 MPa ^1/2 and less than 16.1 MPa ^1/2 , and the polar effect solubility parameter exceeds 3.9 MPa ^1/2 and exceeds 4.7 MPa ¹ Industrial detergent compositions in the range less than ^/2 , and with a hydrogen bonding effect solubility parameter in the range greater than 9.7 MPa ^1/2 and less than 11.6 MPa ^1/2 , avoid the application of substances that are restricted in use for environmental reasons, such as halogens. It can be seen that it is not only environmentally friendly, but also exhibits excellent cleaning power comparable thereto. Moreover, it can be seen that it exhibits superior cleaning power with respect to the oil in the state in which it is present together with water. In addition, it can be seen that properties such as dryness are also excellent.

On the other hand, such analysis results and experimental results can also be used as a means to search for new cleaners. That is, in consideration of solubility parameters, boiling point, kauri-butanol value, environmental regulations, etc., candidate substances are selected, and for the selected candidate substances and combinations thereof, Equations 1-1 to 1-3, Equation 2, and By applying Equation 3-1 to Equation 3-4, the candidate group can be reduced. This is because, by conducting an actual experiment on the candidate group selected in such a way, it will be possible to develop a new detergent relatively easily. However, since there may be many variables that are difficult to predict in the overall process, it is necessary to go through the process of verifying by actual experiments.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can realize that the present invention can be embodied in other specific forms without changing the technical spirit or essential features. you will be able to understand Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (13)

a first solvent, and a second solvent,
The first solvent is a carbonate-based solvent having a carbonate ester group,
The second solvent is a glycol ether-based solvent,
A mixed solvent comprising the first solvent and the second solvent
the total solubility parameter is in the range greater than 18.7 MPa ^1/2 and less than 20.4 MPa ^1/2 ;
Dispersion effect solubility parameter in the range of greater than 15.5 MPa ^1/2 and less than 16.1 MPa ^1/2 , polar effect solubility parameter exceeding 3.9 MPa ^1/2 and less than 4.7 MPa ^1/2 range, and hydrogen bonding effect solubility parameter An industrial cleaning composition with a variable in the range greater than 9.7 MPa ^1/2 and less than 11.6 MPa ^1/2 . According to claim 1,
The first solvent has a total solubility parameter of 18.0 to 18.7 MPa ^1/2 , or
Dispersion effect solubility parameter is 15.5 to 16.6 MPa ^1/2 ,
Polar effect solubility parameter is 3.1 to 3.9 MPa ^1/2 ,
An industrial cleaning composition having a hydrogen bonding effect solubility parameter of 6.1 to 9.7 MPa ^1/2 . According to claim 1,
The second solvent has a total solubility parameter of 20.0 to 22.2 MPa ^1/2 , or
Dispersion effect solubility parameter is 15.4 to 16.1 MPa ^1/2 ,
Polar effect solubility parameter is 4.7 to 8.0 MPa ^1/2 ,
An industrial cleaning composition having a hydrogen bonding effect solubility parameter of 11.2 to 13.1 MPa ^1/2 . According to claim 1,
The carbonate-based solvent having the carbonate ester group is an industrial cleaning composition comprising at least one selected from dimethyl carbonate and diethyl carbonate. According to claim 1,
The glycol ether-based solvent is an industrial cleaning composition comprising at least one selected from propylene glycol methyl ether, dipropylene glycol methyl ether, propylene glycol ene-propyl ether, or ethylene glycol propyl ether. The method of claim 1,
The first solvent and the second solvent is an industrial cleaning composition having a boiling point of 300 degrees Celsius or less. The method of claim 1,
The first solvent and the second solvent are an industrial cleaning composition having a viscosity of 3.0 cPs or less. According to claim 1,
The first solvent and the second solvent have a surface tension of 27.0 dyne / cm or less of an industrial cleaning composition. According to claim 1,
The first solvent and the second solvent have a kauri-butanol value of 70 or more. According to claim 1,
The volume ratio of the second solvent to the first solvent (second solvent volume/first solvent volume) is 0.1 to 10 industrial cleaning composition. According to claim 1,
An industrial cleaning composition further comprising 1-methyl piperazine. The method of claim 1,
Industrial detergent composition further comprising at least one selected from 1,3-dioxolane or a derivative thereof. The method of claim 1,
has a total solubility parameter of 0.8 to 1.7 MPa ^1/2 with a deviation from the total solubility parameter of the mixed solvent;
Dispersion effect solubility parameter with a deviation of 0.7 to 1.7 MPa ^1/2 from the dispersion effect solubility parameter of the mixed solvent;
A polar effect solubility parameter with a deviation of 0.4 to 1.3 MPa ^1/2 from the polar effect solubility parameter of the mixed solvent, and
An industrial cleaning composition for cleaning an object to be cleaned comprising an oil having a hydrogen bonding effect solubility parameter of 1.4 to 5.4 MPa ^1/2 with a deviation from the hydrogen bonding effect solubility parameter of the mixed solvent.

Images