JP6487630B2 - Stock solution for cleaning composition, cleaning composition and cleaning method - Google Patents

Description

  The present invention relates to a detergent composition stock solution, a detergent composition, and a cleaning method, and in particular, by adding a predetermined amount of water, it is excellent in environmental safety, while exhibiting excellent cleaning properties and drying properties. The present invention relates to a stock solution for a detergent composition capable of obtaining a detergent composition having a predetermined cloud point that is excellent in ease of handling, and a detergent composition and a washing method using the same.

Conventionally, when soldering an electronic component such as an IC or a capacitor to a printed circuit board or the like, it is known that the flux scatters from the solder paste and adheres as a residue around the electrode (hereinafter referred to as the flux residue). Referred to as "flux residue").
Such flux residue causes corrosion and the like in the solder joint, and also causes poor bonding in the wire bonding process and poor adhesion to the mold resin in the resin sealing process. In the past, various cleaning agents have been proposed.
Particularly, in recent years, a detergent composition has been proposed that is excellent in environmental safety by containing a relatively large amount of water, while exhibiting excellent detergency (see, for example, Patent Documents 1 and 2).

  That is, Patent Document 1 includes a cleaning composition for cleaning an object to be cleaned in a cloudy state while containing 50 to 1900 parts by weight of water with respect to 100 parts by weight of the stock solution for the cleaning composition. The cleaning composition stock solution contains at least first and second organic solvents as the organic solvent, and the first organic solvent has a boiling point in the range of 140 to 190 ° C, From hydrophobic glycol ether compounds, hydrophobic hydrocarbon compounds, hydrophobic aromatic compounds, hydrophobic ketone compounds, and hydrophobic alcohol compounds having a solubility in water (measurement temperature: 20 ° C.) of 50% by weight or less At least one compound selected from the group consisting of: a second organic solvent having a boiling point within a range of 140 to 190 ° C., and a solubility in water (measurement temperature: 20 ° C.) of 50 wt. More than% It is a hydrophilic amine compound which is a value, and the blending amount of the second organic solvent is set to a value within the range of 0.3 to 30 parts by weight with respect to 100 parts by weight of the first organic solvent. As an organic solvent, a hydrophilic glycol ether compound or a hydrophilic alcohol compound having a boiling point within a range of 140 to 190 ° C. and having a solubility in water (measurement temperature: 20 ° C.) exceeding 50% by weight In the case where at least one compound selected from the group consisting of a hydrophilic nitrogen-containing compound and a hydrophilic sulfur-containing compound is included, the blending amount of the third organic solvent is based on 100 parts by weight of the first organic solvent. The blending amount of the organic solvent having a value of 150 parts by weight or less and a boiling point exceeding 190 ° C. is 0 part by weight or 0 to 15 parts by weight with respect to 100 parts by weight of the first organic solvent. (However, 0 parts by weight are not included.) Detergent compositions are disclosed, characterized in that a value within the range.

  Patent Document 2 discloses that 20-40 wt% of an organic solvent (A) composed of a nonionic compound represented by the following general formula (15) and / or the following general formula (16), and water (B) 60- A cleaning agent for removing flux residue is disclosed, comprising an aqueous solution containing 80% by weight and having a cloud point of 20 to 90 ° C.

(In general formula (15), R ⁷ represents an alkyl group having 2 to 5 carbon atoms or a phenyl group, R ⁸ represents an isopropylene group, and x represents an integer of 1 to 3).

(In General Formula (16), R ⁹ represents an alkyl group having 3 to 8 carbon atoms or a phenyl group, R ¹⁰ represents a normal ethylene group, and y represents an integer of 1 to 3)

Japanese Patent No. 5127090 (Claims) JP 2013-181060 A (Claims)

However, the cleaning composition disclosed in Patent Document 1 has a predetermined hydrophobic organic solvent having a solubility in water at 20 ° C. of 50% by weight or less and a solubility in water at 20 ° C. of 50% by weight. Since a predetermined hydrophilic organic solvent having a value exceeding% is blended in a predetermined range, a problem that the two phases are basically separated at room temperature has been observed.
For this reason, from the viewpoint of liquid management, it is necessary to prepare the cleaning composition by adding water to the cleaning composition stock solution immediately before using the cleaning composition, and the work process becomes complicated. The problem was seen.
In addition, if the cleaning composition is left in excess, it is phase-separated into two phases, which is inconvenient in terms of storage and storage in that it must be stirred again when used next time.
Furthermore, when analyzing detergent compositions (neutralization titration, gas chromatograph, etc.), it is necessary to collect the oil phase and water phase at a predetermined ratio, so sampling and analysis under stirring are essential. However, even in the case of stirring, it was difficult to accurately collect the oil phase and the aqueous phase at a predetermined ratio, and there was a problem that the obtained analytical values were likely to vary.
In addition, the detergent composition stock solution for constituting the detergent composition disclosed in Patent Document 1 increases the flash point by adding water when the flash point is low and the safety is insufficient. When trying to do so, there was a problem that phase separation easily occurred at room temperature.
Therefore, such a phase separation not only makes it difficult to control the flash point itself, but also causes a problem that the ease of handling of the stock solution for the detergent composition is lowered.
In the present invention, “ease of handling” means a characteristic that can be easily handled without adding or stirring water immediately before use or analysis.

On the other hand, the cleaning agent for removing flux residue disclosed in Patent Document 2 does not phase separate under non-cleaning temperature conditions below the cloud point, but phase separates under cleaning temperature conditions above the cloud point. It is possible to solve the disadvantage of ease of handling which has become a problem in (1).
However, the flux residue removing detergent disclosed in Patent Document 2 has a low solubility in the flux residue because the organic solvent as the main washing component is limited to a predetermined monoalkyl glycol ether compound, There was a problem that it was difficult to obtain a cleanability.
In addition, since the organic solvent as the main cleaning component is limited to the predetermined monoalkyl glycol ether compound, the viscosity of the cleaning composition is relatively high despite containing a predetermined amount of water, and the package component. There was a tendency for the detergency in the lower gap to be poor.
In addition, there was a problem in that the dryness from the object to be cleaned after cleaning tends to be insufficient, and the odor is strong.

Therefore, the inventors of the present invention, as a result of diligent investigation, have obtained a stock solution for a cleaning composition comprising a predetermined dialkyl glycol ether compound and a hydrophilic amine compound at a predetermined mixing ratio as an organic solvent, If it is a stock solution for a detergent composition that will have a cloud point in a predetermined range when a certain amount of water is added, it is excellent in environmental safety by blending a predetermined amount of water, while having excellent detergency In addition, the present inventors have found that a detergent composition that can exhibit drying properties and is easy to handle can be obtained, and has completed the present invention.
That is, the object of the present invention is to provide a predetermined cloudiness that is excellent in environmental safety by blending a predetermined amount of water, while being able to exhibit excellent detergency and drying properties and excellent in ease of handling. The object is to provide a detergent composition stock solution capable of obtaining a detergent composition having points, a detergent composition using the same, and a washing method.

  According to the present invention, a detergent composition having a cloud point in the range of 30 to 60 ° C. when water in the range of 40 to 1900 parts by weight is added to 100 parts by weight of the stock solution for the detergent composition. A stock solution for a cleaning composition, which comprises a first and second organic solvent as an organic solvent, and the first organic solvent is a compound represented by the following general formula (1): The second organic solvent is a hydrophilic amine compound, and the blending amount of the second organic solvent is a value within the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent. A stock solution for a cleaning composition is provided, which can solve the above-described problems.

(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2. )

That is, in the case of the stock solution for a cleaning composition of the present invention, when a predetermined amount of water is added, it has a cloud point in a predetermined range, so that a predetermined amount of water is added to the cleaning composition. Even in this case, a uniform state can be stably maintained without phase separation under non-washing temperature conditions below the cloud point.
Therefore, not only in the state of the stock solution for the cleaning composition, but also when the predetermined amount of water is added to form the cleaning composition, there is an advantage that storage, storage, and liquid analysis are facilitated. Excellent handling ease can be exhibited.
In addition, when a predetermined amount of water is added to form a cleaning composition, the phase separation occurs under a cleaning temperature condition higher than the cloud point, so that a white turbid cleaning composition can be obtained by stirring.
Therefore, the detergency resulting from the organic solvent itself in the detergent composition and the cloudiness state exert a synergistic effect, and excellent detergency can be obtained.
Further, in the case of the stock solution for the cleaning composition of the present invention, since the organic solvent contains a predetermined dialkyl glycol ether compound and a hydrophilic amine compound in a predetermined blending ratio, in particular, the predetermined dialkyl glycol ether compound Compared with the case where a predetermined monoalkyl glycol ether compound is used instead of the above, the detergency and drying properties can be effectively improved.
Furthermore, since a relatively large amount of water is added to form a cleaning composition, excellent environmental safety can be exhibited.

Further, in constituting the stock solution for the cleaning composition of the present invention, the boiling point of the first organic solvent is set to a value within the range of 140 to 190 ° C., and the solubility in water (measurement temperature: 20 ° C.) is 20 It is preferable that the value exceeds the weight percent.
By comprising in this way, the adjustment of the cloud point in a cleaning composition becomes easy, and drying property and the reproduction | regeneration efficiency of the cleaning composition after use can be improved effectively.
In the present invention, “solubility in water” means the weight% of a solvent that can be dissolved in 100 weight% of water. Therefore, it becomes the same value as the weight (g) of the solvent that can be dissolved in 100 g of water.

In constituting the stock solution for the cleaning composition of the present invention, the first organic solvent is preferably dipropylene glycol dimethyl ether .
By comprising in this way, since even the 1st organic solvent alone has a cloud point by addition of water, not only the adjustment of the cloud point in the cleaning composition becomes easier, but also the cleaning properties and drying properties are improved. It can be improved effectively.

Further, in constituting the stock composition for the cleaning composition of the present invention, the boiling point of the second organic solvent is set to a value within the range of 140 to 190 ° C., and the solubility in water (measurement temperature: 20 ° C.) is 50. It is preferable that the value exceeds the weight percent.
By comprising in this way, adjustment of the cloud point in a cleaning composition becomes still easier, and also the drying property and the reproduction | regeneration efficiency of the cleaning composition after use can be improved more.

In constituting the stock composition for the cleaning composition of the present invention, the second organic solvent is selected from the group consisting of N, N-diethylisopropanolamine, N-ethylethanolamine, N-methylethanolamine and monoisopropanolamine. It is preferably at least one compound selected.
By comprising in this way, the adjustment of the cloud point in a cleaning composition becomes much easier, and the washing | cleaning property with respect to a flux residue can be improved further more effectively.

Further, in constituting the stock solution for the cleaning composition of the present invention, the SP value of the first organic solvent is set to a value within the range of 6.5 to 12, and the SP value of the second organic solvent is set to 8 to A value within the range of 15 is preferred.
By comprising in this way, the adjustment of the cloud point in a cleaning composition can be made still easier.

Further, in constituting the stock solution for the cleaning composition of the present invention, as the third organic solvent, a compound represented by the following general formula (2) and a compound represented by the following general formula (3), or either Including one, the blending amount of the third organic solvent is a value within a range of 0 to 200 parts by weight (however, 0 part by weight is not included) with respect to 100 parts by weight of the first organic solvent. It is preferable to do.

(In General Formula (2), R ^{4 to} R ⁵ are each an independent substituent, R ⁴ is an alkyl group having 1 to 5 carbon atoms, R ⁵ is a normal ethylene group or an isopropylene group, The repeat number m is an integer of 1 to 3.)

(In general formula (3), R ⁶ is a hydrogen atom or a methyl group.)

  By constituting in this way, when a predetermined amount of water is added to the stock solution for the cleaning composition to form a cleaning composition, in a cleaning temperature environment above the cloud point of the cleaning composition, Not only can the dispersibility of the first organic solvent in the emulsion in water be improved, but also the adjustment of the cloud point in the detergent composition can be made easier.

Further, in constituting the stock solution for the cleaning composition of the present invention, the amount of the organic solvent having a boiling point exceeding 190 ° C. is 0 part by weight with respect to 100 parts by weight of the first organic solvent, or A value within the range of 0 to 15 parts by weight (however, 0 part by weight is not included) is preferable.
By comprising in this way, the drying property of a cleaning composition and the reproduction | regeneration efficiency of the cleaning composition after use can be improved more effectively.

Moreover, in comprising the stock solution for cleaning composition of this invention, while containing water, the compounding quantity of the said water is the value within the range of 1-25 weight part with respect to 100 weight part of 1st organic solvents. It is preferable that
By comprising in this way, the flash point in the stock solution for cleaning composition can be raised stably, without carrying out phase separation in a storage state (stationary state), and the safety in handling can be improved.

  Moreover, another aspect of the present invention has a cloud point in the range of 30 to 60 ° C., which is obtained by adding water in the range of 40 to 1900 parts by weight with respect to 100 parts by weight of the stock solution for the detergent composition. A cleaning composition comprising a cleaning composition having a stock solution containing first and second organic solvents as an organic solvent, wherein the first organic solvent is represented by the following general formula (1): And the second organic solvent is a hydrophilic amine compound, and the blending amount of the second organic solvent is in the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent. It is set as the value of this, It is a cleaning composition characterized by the above-mentioned.

(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2. )

  That is, in the case of the cleaning composition of the present invention, since a predetermined amount of water is added to a predetermined stock solution for cleaning composition, it is excellent in environmental safety, while having excellent cleaning properties and drying. And can also exhibit excellent ease of handling.

  Still another embodiment of the present invention has a cloud point in the range of 30 to 60 ° C., with water in the range of 40 to 1900 parts by weight added to 100 parts by weight of the stock solution for the detergent composition. A cleaning composition preparation step for preparing a cleaning composition, and cleaning the object to be cleaned in a cloudy state while maintaining the cleaning composition obtained at a temperature equal to or higher than the cloud point of the cleaning composition. A cleaning process comprising: a stock solution for a detergent composition containing first and second organic solvents as an organic solvent, wherein the first organic solvent is represented by the following general formula (1): The second organic solvent is a hydrophilic amine compound, and the blending amount of the second organic solvent is 0.1 to 100 weights with respect to 100 parts by weight of the first organic solvent. The cleaning method is characterized in that the value is within the range of the part.

(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2. )

  That is, with the cleaning method of the present invention, since it is a cleaning method using a cleaning composition obtained by adding a predetermined amount of water to a predetermined stock solution for a cleaning composition, environmental issues are considered. However, the object to be cleaned can be efficiently cleaned.

FIGS. 1A to 1B are diagrams for explaining an example of a cleaning apparatus. 2A to 2B are photographs showing the appearance of the cleaning composition in Example 3. FIG. 3A to 3B are photographs showing the appearance of the cleaning composition in Comparative Example 6. FIG.

[First Embodiment]
The first embodiment has a clouding point in the range of 30 to 60 ° C. when water in the range of 40 to 1900 parts by weight is added to 100 parts by weight of the stock solution for the detergent composition. A stock solution for a cleaning composition, which is a composition, which contains first and second organic solvents as an organic solvent, and the first organic solvent is a compound represented by the following general formula (1) The second organic solvent is a hydrophilic amine compound, and the blending amount of the second organic solvent is a value within the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent. A stock solution for a cleaning composition, characterized in that

(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2. )

1. 1st organic solvent (1) kind The 1st organic solvent which comprises the stock solution for cleaning composition of this invention is a compound represented by following General formula (1), It is characterized by the above-mentioned.

(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2. )

The reason for this is that a predetermined amount of water is added to the stock solution for the detergent composition, in combination with the effect of the second organic solvent described later, in the case of the predetermined dialkyl glycol ether compound represented by the general formula (1) This is because, when the detergent composition is used, the emulsion is brought into an emulsion state under a washing temperature condition equal to or higher than the cloud point of the detergent composition and contributes to making the detergent composition cloudy.
In addition, since the predetermined dialkyl glycol ether compound is hardly affected by the decrease in fat solubility due to the addition of water, it is excellent even when a predetermined amount of water is added to the stock solution for the detergent composition. Detergency can be effectively exhibited.
In particular, since the prescribed dialkyl glycol ether compound is excellent in the ability to dissolve the flux residue, the detergency is more effective than the case where the prescribed monoalkyl glycol ether compound is used instead of the prescribed dialkyl glycol ether compound. Can be improved.
Therefore, a predetermined amount of water is added to the stock solution for the cleaning composition by the synergistic effect of the excellent detergency inherent in the predetermined dialkyl glycol ether compound and that it becomes an emulsion state. In the case of a composition, excellent cleaning properties can be exhibited.
In addition, when a predetermined dialkyl glycol ether compound is used, the viscosity and surface tension are low even when a predetermined amount of water is added, and the liquid drainage and wettability are good. Compared with the case of using the monoalkyl glycol ether compound, the drying property can be effectively improved.
Furthermore, if it is a predetermined dialkyl glycol ether compound, an odor can be effectively suppressed compared with the case where a predetermined monoalkyl glycol ether compound is used instead of the predetermined dialkyl glycol ether compound.

  Examples of the compound represented by the general formula (1) include diethylene glycol dimethyl ether (boiling point: 162 ° C., solubility in water: 100% by weight or more, SP value: 8.7, flash point: 56 ° C.), diethylene glycol Diethyl ether (boiling point: 189 ° C., water solubility: 100% by weight or more, SP value: 8.9, flash point: 70 ° C.), dipropylene glycol dimethyl ether (boiling point: 171 ° C., water solubility: 37% by weight) , SP value: 8.2, flash point: 65 ° C., diethylene glycol methyl ethyl ether (boiling point: 176 ° C., solubility in water: 100% by weight or more, SP value: 9.3, flash point: 66 ° C.), diethylene glycol Isopropyl methyl ether (boiling point: 179 ° C., water solubility: 100% by weight or more, SP value: 9.2, flash point: 74 ° C.) It is.

Of the above-mentioned compounds, it is particularly preferable to use diethylene glycol diethyl ether and dipropylene glycol dimethyl ether, or one of them.
This is because these compounds alone have a cloud point due to the addition of water, so that not only the adjustment of the cloud point in the cleaning composition is facilitated, but also the cleaning and drying properties are more effective. This is because it can be improved.
That is, with these compounds, for example, when a 30% by weight aqueous solution is used as a whole, it has a cloud point in the range of 10 to 90 ° C., and the boiling point, SP value, viscosity, and surface tension are predetermined. Since it is a range, the adjustment of the cloud point in a cleaning composition becomes easy, and the cleaning property and drying property can be improved more effectively.

(2) Boiling point Moreover, it is preferable to make the boiling point of a 1st organic solvent into the value within the range of 140-190 degreeC.
The reason for this is that when the boiling point is less than 140 ° C., the amount of volatilization during use increases and the amount of liquid consumed increases, so the economy may deteriorate. On the other hand, when the boiling point exceeds 190 ° C., when the used cleaning composition is regenerated by fractional distillation, the required energy becomes excessively large, or high-boiling components are distilled off during the regeneration. This is because the recovery efficiency of the cleaning composition is likely to decrease, such as a decrease in the recovery rate of the cleaning composition or the inability to obtain a cleaning composition having a predetermined composition. In addition, since the heating temperature at the time of fractionating the cleaning composition after use becomes high, the components of the cleaning composition are liable to be decomposed, and the cleaning property of the cleaning composition after regeneration is improved. This is because it becomes difficult to stably obtain a cleaning composition having a sufficient detergency. Furthermore, it is because drying property also worsens and it becomes easy to remain in a to-be-cleaned object by poor drying.
Therefore, the boiling point in the first organic solvent is more preferably set to a value within the range of 145 to 185 ° C, and further preferably set to a value within the range of 150 to 180 ° C.

(3) Solubility It is preferable that the solubility (measurement temperature: 20 ° C.) of the first organic solvent in water exceeds 20% by weight.
The reason for this is that when the solubility is 20% by weight or less, the solubility in water is excessively low. Therefore, when a predetermined amount of water is added to the cleaning composition, the two phases immediately at normal temperature. This is because separation may occur and it may be difficult to adjust the cloud point to a predetermined range. On the other hand, when the solubility becomes excessively large, the cloud point becomes excessively high when water is added to the detergent composition stock solution to form a cloudiness under the washing temperature condition. This is because it may be difficult to obtain the state. Moreover, it becomes easy to be compatible with water, and it may be difficult to fully exhibit the inherent detergency.
Accordingly, the solubility of the first organic solvent in water (measurement temperature: 20 ° C.) is more preferably set to a value within a range of 21 to 200% by weight, and a value within a range of 22 to 50% by weight. More preferably.

(4) SP value Moreover, it is preferable to make SP value of the 1st organic solvent into the value within the range of 6.5-12.
The reason for this is that when the SP value is less than 6.5, the compatibility with the second organic solvent is excessively lowered, and it becomes difficult to configure the stock solution for the detergent composition as a uniform solution. This is because there are cases. On the other hand, when the SP value exceeds 12, the compatibility with water becomes excessively high, and when a predetermined amount of water is added to the detergent composition stock solution, the detergent composition is obtained. In addition, the cloud point becomes excessively high, and it may be difficult to obtain a cloudy state under the washing temperature condition.
Therefore, the SP value in the first organic solvent is more preferably set to a value within the range of 7 to 11, and further preferably set to a value within the range of 7.5 to 10.

(5) Flash point Moreover, it is preferable to make the flash point of a 1st organic solvent into the value within the range of 30-100 degreeC.
The reason for this is that when the flash point becomes a value of less than 30 ° C., the flash point in the detergent composition stock solution or a detergent composition obtained by adding a predetermined amount of water to the stock solution tends to be less than 40 ° C., This is because it may fall under dangerous goods under the Fire Service Law. On the other hand, if the flash point exceeds 100 ° C., the compound that can be used as the first organic solvent may be excessively limited.
Therefore, when the first organic solvent has a flash point, the flash point is preferably set to a value within the range of 35 to 85 ° C, and more preferably set to a value within the range of 40 to 70 ° C.

(6) Compounding quantity Moreover, it is preferable to make the compounding quantity of a 1st organic solvent into the value within the range of 40-99.7 weight% with respect to the whole quantity of the stock solution for cleaning composition.
The reason for this is that when the blending amount is less than 40% by weight, the detergency tends to be excessively reduced, or a predetermined amount of water is added to the detergent composition stock solution and the detergent composition In this case, the cloud point becomes excessively high, and it may be difficult to obtain a cloudy state under the washing temperature condition. On the other hand, when such a blending amount exceeds 99.7% by weight, when a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition, the cloud point is excessively high. This is because it may be difficult to obtain a cloudy state under the washing temperature condition.
Therefore, the blending amount of the first organic solvent is more preferably set to a value within the range of 45 to 99.5% by weight with respect to the total amount of the stock solution for the detergent composition, More preferably, the value is within the range.

2. Second Organic Solvent (1) Type The second organic solvent constituting the stock solution for the detergent composition of the present invention is a hydrophilic amine compound.
The reason for this is that if it is a hydrophilic amine compound, a cleaning temperature condition above the cloud point of the cleaning composition when a predetermined amount of water is added to the stock solution for the cleaning composition to form a cleaning composition. This is because the first organic solvent in the emulsion state and water are held below to improve the dispersibility of the emulsion, and as a result, the detergency in the cleaning composition can be improved.
Moreover, since the 2nd organic solvent itself also has the outstanding detergency with respect to a flux residue, it can contribute to the improvement of the detergency in a cleaning composition by itself.

  Examples of the hydrophilic amine compound include N-ethylpiperazine (boiling point: 157 ° C., water solubility: 100% by weight or more, SP value: 9.7, flash point: 43 ° C.), N, N-diethyl. Isopropanolamine (boiling point: 159 ° C, solubility in water: 100 wt% or more, SP value: 10.3, flash point: 44 ° C), N-methylethanolamine (boiling point: 160 ° C, solubility in water: 100 wt%) % Or more, SP value: 12.0, flash point: 74 ° C., monoisopropanolamine (boiling point: 160 ° C., solubility in water: 100 wt% or more, SP value: 12.7, flash point: 74 ° C.), N, N-diethylethanolamine (boiling point: 162 ° C., solubility in water: 100% by weight or more, SP value: 11.0, flash point: 55 ° C.), N-ethylethanolamine (boiling point: 169 ° C., to water) Dissolution : 100 wt% or more, SP value: 11.4, flash point: 71 ° C, Nt-butylethanolamine (boiling point: 175 ° C, solubility in water: 100 wt% or more, SP value: 10.1, Flash point: 88 ° C.), 1-amino-4-methylpiperazine (boiling point: 178 ° C., solubility in water: 100% by weight or more, SP value: 11.6, flash point: 62 ° C.), N-aminoethylpiperazine (Boiling point: 182 ° C., solubility in water: 100% by weight or more, SP value: 9.9, flash point: 58 ° C.), N-allylpiperazine (boiling point: 185 ° C., solubility in water: 100% by weight or more) SP value: 9.4, flash point: 52 ° C.) and the like.

Further, among the hydrophilic amine compounds described above, in particular, it is at least one compound selected from the group consisting of N, N-diethylisopropanolamine, N-ethylethanolamine, N-methylethanolamine and monoisopropanolamine. Is preferred.
This is because these compounds not only make it easier to adjust the cloud point in the cleaning composition, but can further improve the cleaning properties and drying properties.
That is, if these water-soluble amines, there is an effect of increasing the cloud point of the detergent composition, and can be dissolved in each of the oil phase and the aqueous phase separated into two phases, The detergency of each phase and the dispersibility of the first organic solvent in an emulsion state can be further improved.

(2) Boiling point Moreover, it is preferable to make the boiling point of a 2nd organic solvent into the value within the range of 140-190 degreeC.
The reason for this is that when the boiling point is less than 140 ° C., the amount of volatilization during use increases and the amount of liquid consumed increases, resulting in poor economic efficiency. On the other hand, when the boiling point exceeds 190 ° C., when the used cleaning composition is regenerated by fractional distillation, the required energy becomes excessively large, or high-boiling components are distilled off during the regeneration. This is because the recovery efficiency of the cleaning composition is likely to decrease, such as a decrease in the recovery rate of the cleaning composition or the inability to obtain a cleaning composition having a predetermined composition. In addition, since the heating temperature at the time of fractionating the cleaning composition after use becomes high, the components of the cleaning composition are liable to be decomposed, and the cleaning property of the cleaning composition after regeneration is improved. This is because it becomes difficult to stably obtain a cleaning composition having a sufficient detergency. Furthermore, it is because drying property also worsens and it becomes easy to remain in a to-be-cleaned object by poor drying.
Therefore, the boiling point of the second organic solvent is more preferably set to a value within the range of 145 to 185 ° C, and further preferably set to a value within the range of 150 to 180 ° C.

(3) Solubility It is preferable that the solubility (measurement temperature: 20 ° C.) of the second organic solvent in water exceeds 50% by weight.
The reason for this is that when the solubility is 50% by weight or less, when the detergent composition is prepared by adding water to the detergent composition stock solution, it becomes an emulsion state under the washing temperature condition. This is because it may be difficult to improve the dispersibility of the emulsion by holding between the organic solvent 1 and water.
Accordingly, the solubility of the second organic solvent in water (measurement temperature: 20 ° C.) is more preferably set to a value in the range of 60 to ∞ wt%, and is set to a value in the range of 70 to ∞ wt%. More preferably.

(4) SP value Moreover, it is preferable to make SP value of the 2nd organic solvent into the value within the range of 8-15.
The reason for this is that when the SP value is less than 8, the compatibility with water becomes excessively low, and a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition. In some cases, it may be difficult to improve the dispersibility of the emulsion by holding between the first organic solvent in an emulsion state under the washing temperature condition and water. On the other hand, when the SP value exceeds 15, the compatibility with the first organic solvent is excessively lowered, and it may be difficult to configure the stock solution for the detergent composition as a uniform solution. Because.
Therefore, the SP value in the second organic solvent is more preferably set to a value within the range of 8.5 to 14, and further preferably set to a value within the range of 9 to 13.

(5) Flash point It is preferable to make the flash point of a 2nd organic solvent into the value within the range of 30-100 degreeC.
The reason for this is that when the flash point becomes a value of less than 30 ° C., the flash point in the detergent composition stock solution or a detergent composition obtained by adding a predetermined amount of water to the stock solution tends to be less than 40 ° C., This is because it may fall under dangerous goods under the Fire Service Law. On the other hand, if the flash point exceeds 100 ° C., the compound that can be used as the second organic solvent may be excessively limited.
Therefore, when the second organic solvent has a flash point, it is more preferable to set the flash point to a value within the range of 40 to 90 ° C, and further to a value within the range of 50 to 80 ° C. preferable.

(6) Compounding quantity Moreover, the compounding quantity of a 2nd organic solvent shall be a value within the range of 0.1-100 weight part with respect to 100 weight part of 1st organic solvents, It is characterized by the above-mentioned.
The reason for this is that when the blending amount is less than 0.1 parts by weight, when a predetermined amount of water is added to the detergent composition stock solution to obtain a detergent composition, This is because it may be difficult to obtain an effect of improving the dispersibility of the emulsion by holding between the first organic solvent in an emulsion state and water under a washing temperature condition higher than the cloud point. . Moreover, it is because it may become difficult to obtain the washability by the second organic solvent itself. On the other hand, when the blending amount exceeds 100 parts by weight, the cloud point becomes excessively high when a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition. This is because it may be difficult to obtain a cloudy state under the washing temperature condition, or the metal corrosivity may be excessively increased.
Therefore, the blending amount of the second organic solvent is more preferably set to a value within the range of 0.3 to 85 parts by weight with respect to 100 parts by weight of the first organic solvent, and 0.5 to 70 parts by weight. It is more preferable to set the value within the range.

3. Third Organic Solvent (1) Type In addition, in constituting the stock solution for the cleaning composition of the present invention, as the third organic solvent, a compound represented by the following general formula (2) and the following general formula (3) It is preferable to contain the compound represented by these, or any one.

(In General Formula (2), R ^{4 to} R ⁵ are each an independent substituent, R ⁴ is an alkyl group having 1 to 5 carbon atoms, R ⁵ is a normal ethylene group or an isopropylene group, The repeat number m is an integer of 1 to 3.)

(In general formula (3), R ⁶ is a hydrogen atom or a methyl group.)

  The reason for this is that when the predetermined monoalkyl glycol ether compound represented by the general formula (2) is used, a cleaning agent is washed when a predetermined amount of water is added to the cleaning agent composition stock solution. This is because the dispersibility of the first organic solvent in the form of an emulsion in water can be further improved in a washing temperature environment above the cloud point of the agent composition.

Among the compounds represented by the general formula (2), in particular, ethylene glycol monoisobutyl ether (boiling point: 161 ° C., water solubility: 100% by weight or more, SP value: 9.1, flash point: 57 ° C. ), 3-methoxy-3-methyl-1-butanol (boiling point: 174 ° C., solubility in water: 100% by weight or more, SP value: 10.5, flash point: 68 ° C.), propylene glycol monobutyl ether (boiling point: 171 ° C., water solubility: 6.4 wt%, SP value: 9.0, flash point: 62 ° C. and propylene glycol monopropyl ether (boiling point: 150 ° C., water solubility: 100 wt% or more, SP Value: 9.6, flash point: 48 ° C., ethylene glycol monoisopropyl ether (boiling point: 142 ° C., solubility in water: 100% by weight or more, SP value: 10.9, flash point: 4) ° C), ethylene glycol monopropyl ether (boiling point: 150 ° C, solubility in water: 100 wt% or more, SP value: 10.8, flash point: 57 ° C), ethylene glycol mono-tert-butyl ether (boiling point: 153 ° C) Solubility in water: 100% by weight or more, SP value: 10.3, flash point: 55 ° C., 3-methoxybutanol (boiling point: 161 ° C., solubility in water: 100% by weight or more, SP value: 10. 3, flash point: 65 ° C., ethylene glycol monobutyl ether (boiling point: 171 ° C., water solubility: 100% by weight or more, SP value: 10.4, flash point: 63 ° C.) and dipropylene glycol monomethyl ether (boiling point) 187 ° C., solubility in water: 100% by weight or more, SP value: 10.2, flash point: 76 ° C.) It is preferable to use things.
This is because the solubility in water enables the adjustment of the cloud point in the cleaning composition, and also exhibits the auxiliary role of the first and second organic solvents, so that the cleaning property, drying property, dispersibility It is because it can improve more.

(2) Boiling point Moreover, it is preferable to make the boiling point of a 3rd organic solvent into the value within the range of 140-190 degreeC.
The reason for this is that when the boiling point is less than 140 ° C., the amount of volatilization during use increases and the amount of liquid consumed increases, so the economy may deteriorate. On the other hand, when the boiling point exceeds 190 ° C., when the used cleaning composition is regenerated by fractional distillation, the required energy becomes excessively large, or high-boiling components are distilled off during the regeneration. This is because the recovery efficiency of the cleaning composition is likely to decrease, such as a decrease in the recovery rate of the cleaning composition or the inability to obtain a cleaning composition having a predetermined composition. In addition, since the heating temperature at the time of fractionating the cleaning composition after use becomes high, the components of the cleaning composition are liable to be decomposed, and the cleaning property of the cleaning composition after regeneration is improved. This is because it becomes difficult to stably obtain a cleaning composition having a sufficient detergency. Furthermore, it is because drying property also worsens and it becomes easy to remain in a to-be-cleaned object by poor drying.
Therefore, the boiling point in the third organic solvent is more preferably set to a value within the range of 150 to 185 ° C, and further preferably set to a value within the range of 160 to 180 ° C.

(3) Solubility It is preferable that the solubility (measurement temperature: 20 ° C.) of the third organic solvent in water exceeds 50% by weight.
This is because, when the solubility is a value of 50% by weight or less, when a predetermined amount of water is added to the detergent composition stock solution to obtain a detergent composition, the washing temperature is higher than the cloud point. This is because it may be difficult to contribute to the improvement of the dispersibility of the first organic solvent in the emulsion in water.
Therefore, the solubility of the third organic solvent in water (measurement temperature: 20 ° C.) is more preferably set to a value in the range of 60 to ∞ wt%, and a value in the range of 70 to ∞ wt%. Is more preferable.

(4) SP value Moreover, it is preferable to make SP value in a 3rd organic solvent into the value within the range of 8-15.
The reason for this is that when the SP value is less than 8, the compatibility with water becomes excessively low, and a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition. In this case, it may be difficult to sufficiently improve the dispersibility of the first organic solvent in an emulsion state under a washing temperature condition higher than the cloud point in water. On the other hand, when the SP value exceeds 15, the compatibility with the first and second organic solvents decreases excessively, and it becomes difficult to configure the stock solution for the cleaning composition as a uniform solution. This is because there are cases.
Therefore, the SP value in the third organic solvent is more preferably set to a value within the range of 8.5 to 14, and further preferably set to a value within the range of 9 to 13.

(5) Flash point Moreover, it is preferable to make the flash point of a 3rd organic solvent into the value within the range of 30-100 degreeC.
The reason for this is that when the flash point becomes a value of less than 30 ° C., the flash point in the cleaning composition stock solution and the cleaning composition obtained by adding a predetermined amount of water to the solution tends to be less than 40 ° C., This is because it may fall under dangerous goods under the Fire Service Law. On the other hand, if the flash point exceeds 100 ° C., the compound that can be used as the third organic solvent may be excessively limited.
Therefore, when the third organic solvent has a flash point, it is more preferable to set the flash point to a value within the range of 40 to 90 ° C, and further to a value within the range of 50 to 80 ° C. preferable.

(6) Blending amount The blending amount of the third organic solvent is a value within the range of 0 to 200 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the first organic solvent. It is preferable that
The reason for this is that when the blending amount is 0 part by weight, when a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition, the emulsion is used under washing temperature conditions above the cloud point. This is because it becomes difficult to improve the dispersibility of the first organic solvent in the state with respect to water. On the other hand, when the blending amount exceeds 200 parts by weight, when a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition, it becomes difficult to adjust the cloud point, This is because it may be difficult to obtain a cloudy state under a predetermined washing temperature condition.
Therefore, the blending amount of the third organic solvent is more preferably set to a value within a range of 1 to 170 parts by weight with respect to 100 parts by weight of the first organic solvent, and within a range of 20 to 150 parts by weight. More preferably, it is a value.

4). Fourth Organic Solvent (1) Kind In addition, in constituting the stock solution for the cleaning composition of the present invention, it is preferable that a hydrophobic amine compound is included as the fourth organic solvent.
The reason for this is that if it is a hydrophobic amine compound, the detergent is supplemented with the first organic solvent and a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition. This is because the liquid properties of the stock solution for a detergent composition that becomes cloudy under a washing temperature condition higher than the cloud point of the composition can be obtained more stably.

  Examples of the hydrophobic amine compound include dibutylamine (boiling point: 160 ° C., water solubility: 1 wt% or less, SP value: 7.8, flash point: 43 ° C.), 2-ethylhexylamine (boiling point: 169 ° C., solubility in water: 1 wt% or less, SP value: 8.4, flash point: 60 ° C., N-methylbenzylamine (boiling point: 180 ° C., solubility in water: 6.5 wt%, SP Value: 9.5, flash point: 77 ° C), N, N-dimethylbenzylamine (boiling point: 181 ° C, solubility in water: 1.2, SP value: 9.8, flash point: 60 ° C), etc. Can be mentioned.

Among the above-mentioned fourth organic solvents, it is particularly preferable to use at least one compound selected from the group consisting of dibutylamine, 2-ethylhexylamine and N, N-dimethylbenzylamine.
The reason for this is that, in the case of the fourth organic solvent of this kind, when a predetermined amount of water is added to the detergent composition stock solution to form a detergent composition, the detergent composition becomes cloudy. This is because the liquid characteristics of the stock solution for the detergent composition that becomes cloudy under the above-described washing temperature conditions can be obtained more stably.

(2) Compounding quantity Moreover, it is preferable to make the compounding quantity of a 4th organic solvent into the value within the range of 0.3-30 weight part with respect to 100 weight part of 1st organic solvents.
The reason for this is that when the amount is less than 0.3 parts by weight, the effect of addition may be insufficient. On the other hand, when the blending amount exceeds 30 parts by weight, it becomes easy to phase-separate at a stage where a predetermined amount of water is added to the stock solution for the detergent composition under the non-washing temperature condition, which is excellent. This is because it may be difficult to obtain ease of handling or the metal corrosivity may be excessively increased.
Therefore, the blending amount of the fourth organic solvent is more preferably set to a value within the range of 0.5 to 20 parts by weight with respect to 100 parts by weight of the first organic solvent, and the range of 1 to 15 parts by weight. More preferably, the value is within the range.

5. Surfactant (1) Type Surfactant has the effect of improving the emulsifiability to water such as the first organic solvent mentioned above and the effect of improving the affinity for the object to be cleaned. Since there exists an effect to improve, you may add.
Here, as preferable examples of the surfactant, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene polypropylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene which are nonionic surfactants are used. A single type of glycol fatty acid ester, polyoxyethylene alkylamine, polyoxyethylene benzyl alcohol, polyglycerin fatty acid ester, or a combination of two or more types may be mentioned.

(2) Blending amount In the stock solution for the cleaning composition of the present invention, it is preferable not to contain a surfactant, but even a small amount of addition improves the emulsifiability to water and contributes to the improvement of the affinity for the object to be cleaned. As long as it is a surfactant that exhibits an effect of improving cleaning properties, it may be blended in a range that does not excessively affect the drying properties and the electrical characteristics of the object to be cleaned.
Even in this case, it is preferable to set the value within the range of 0 to 3% by weight (excluding 0% by weight) with respect to the total amount of the stock solution for the detergent composition.
The reason for this is that when the amount of such a surfactant exceeds 3% by weight, the residual amount in the object to be cleaned increases, and a rinsing step becomes essential. When it is deteriorated or a predetermined amount of water is added to form a cleaning composition, the clouding point of the cleaning composition becomes excessively high, and it becomes difficult to obtain a cloudy state under cleaning temperature conditions. It is because there is a case to do.
Therefore, it is more preferable to make the compounding quantity of surfactant into the value within the range of 0.01 to 2 weight% with respect to the whole quantity of the stock solution for cleaning compositions, and 0.1 to 1 weight%. More preferably, the value is within the range.

6). Organic solvent having a boiling point exceeding 190 ° C. Further, the stock solution for the cleaning composition of the present invention preferably does not contain an organic solvent having a boiling point exceeding 190 ° C.
The reason for this is that when the cleaning composition after use is regenerated by fractional distillation, the energy required becomes excessively large, or high-boiling components are not distilled during regeneration, and the recovery rate of the cleaning composition is high. This is because there are cases where the regeneration efficiency tends to be lowered, for example, it may be reduced or a cleaning composition having a predetermined composition cannot be obtained. In addition, since the heating temperature at the time of fractionating the cleaning composition after use becomes high, the components of the cleaning composition are liable to be decomposed, and the cleaning property of the cleaning composition after regeneration is improved. This is because it becomes difficult to stably obtain a cleaning composition having a sufficient detergency. Furthermore, it is because drying property also worsens and it becomes easy to remain in a to-be-cleaned object by poor drying.
However, for example, benzyl alcohol and N-methylpyrrolidone, such as benzyl alcohol and N-methylpyrrolidone, are organic solvents that contribute to improving the cleaning properties of the cleaning composition even if added in a small amount. You may mix | blend within the range which does not influence a property too much.
Even in this case, the blending amount of the organic solvent having a boiling point exceeding 190 ° C. is 0 to 15 parts by weight (however, 0 part by weight is not included) with respect to 100 parts by weight of the first organic solvent. .), More preferably 0.01 to 12 parts by weight, even more preferably 0.1 to 10 parts by weight. .
In addition, when a predetermined amount of water is added to the stock solution for the detergent composition to obtain a detergent composition, the blending amount of the organic solvent having a boiling point exceeding 190 ° C. The amount is preferably 0 to less than 5% by weight, more preferably 0.001 to 4% by weight, and more preferably 0.01 to 3% by weight. More preferably.

7). Ester Compound In addition, the stock solution for a cleaning composition of the present invention preferably contains no ester compound from the viewpoint of improving the regeneration efficiency of the cleaning composition.
That is, when the stock solution for the detergent composition contains an ester compound, if the detergent composition after use is to be regenerated by fractional distillation, the ester compound undergoes hydrolysis during distillation regeneration, and the distillate obtained by the regeneration. This is because there is a possibility that the washability of the liquid is lowered, and it is difficult to obtain sufficient washability.
However, for the purpose of further improving detergency, for example, ethylene glycol monobutyl ether acetate, as long as it does not excessively affect the detergency reduction and cloud point reduction after distillation regeneration of the detergent composition. Ester compounds such as these may be used.
In this case, it is preferable to make the compounding quantity of an ester compound into the value within the range of 0.1-25 weight part with respect to 100 weight part of 1st organic solvents, and the value within the range of 1-12 weight part More preferably, the value is more preferably in the range of 2 to 6 parts by weight.

8). Water In addition, it is preferable that a predetermined amount of water is included in constituting the stock solution for the cleaning composition of the present invention.
The reason for this is that by including a predetermined amount of water, the flash point of the detergent composition stock solution can be increased stably without phase separation, and the handling safety can be improved.
Moreover, it is preferable to make the compounding quantity of water into the value within the range of 1-25 weight part with respect to 100 weight part of 1st organic solvents.
The reason for this is that when the blending amount is less than 1 part by weight, it may be difficult to sufficiently raise the flash point in the detergent composition stock solution. On the other hand, if the blending amount exceeds 25 parts by weight, the flash point will be increased more than necessary, so that the stock solution for the detergent composition is diluted excessively and the merit as the stock solution is thin. In addition, there may be a problem that the transportation cost becomes high.
Therefore, it is more preferable to set the blending amount of water to a value in the range of 2 to 20 parts by weight with respect to 100 parts by weight of the first organic solvent, and to a value in the range of 3 to 18 parts by weight. Is more preferable.

9. Flash point and combustion point The stock solution for cleaning composition of the present invention has no flash point, or even if it has a flash point, its temperature is set to a value of 40 ° C or higher, and the combustion point is A value of 60 ° C. or higher is preferable.
This is because if the flash point is 40 ° C. or higher and the combustion point is 60 ° C. or higher, the fire point is no longer a hazardous material.
However, if the flash point and the combustion point of the stock solution for the detergent composition are excessively high, the types and blending amounts of the usable first and second organic solvents may be excessively limited.
Therefore, even if the detergent composition stock solution has a flash point, the temperature is more preferably set to a value within the range of 45 to 150 ° C, and the value within the range of 50 to 100 ° C. Is more preferable.
Moreover, it is more preferable to make the combustion point of the stock solution for cleaning composition into a value within the range of 70-250 degreeC, and it is further more preferable to set it as the value within the range of 80-150 degreeC.
In addition, as described in Example 1, the flash point of the cleaning composition can be measured according to JIS K 2265-1 and 4 (how to determine the flash point).

Moreover, the stock solution for the cleaning composition of the present invention is within the range of 30 to 60 ° C. when water in the range of 40 to 1900 parts by weight is added to 100 parts by weight of the stock solution for cleaning composition. It becomes the cleaning composition which has the cloud point of.
This is because, when 100 parts by weight of the detergent composition stock solution is added with at least one point of water within the range of 40 to 1900 parts by weight, the resulting detergent composition has a cloud point of 30 to 60 ° C. It means that it is within the range, and when adding water within the total range of 40 to 1900 parts by weight, it does not mean that the cloud point of the obtained detergent composition is always within the range of 30 to 60 ° C. .
The cloud point of the cleaning composition will be specifically described in the second embodiment.

[Second Embodiment]
In the second embodiment, a detergent composition having a cloud point in the range of 30 to 60 ° C. is obtained by adding water in the range of 40 to 1900 parts by weight with respect to 100 parts by weight of the stock solution for the detergent composition. The stock solution for cleaning composition contains the first and second organic solvents as the organic solvent, and the first organic solvent is a compound represented by the following general formula (1), 2 is a hydrophilic amine compound, and the blending amount of the second organic solvent is set to a value within the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent. This is a cleaning composition.

(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2. )

1. Cleaning Solution Composition Stock Solution In the second embodiment, since the cleaning composition stock solution described in the first embodiment is used as it is, the description thereof is omitted here.

2. Water The cleaning composition of the present invention is characterized by adding water in the range of 40 to 1900 parts by weight with respect to 100 parts by weight of the stock solution for cleaning composition.
The reason for this is that when the amount of water added is less than 40 parts by weight, the cloud point becomes excessively high, and it becomes difficult to obtain a cloudy state under the washing temperature condition, and sufficient detergency can be obtained. This is because not only it becomes difficult, but the environmental safety may be poor, and it may become easy to correspond to a dangerous article in the Fire Service Act. On the other hand, when the amount of water added exceeds 1900 parts by weight, the cloud point becomes excessively high in this case as well, and it becomes difficult to obtain a cloudy state under the washing temperature condition, thereby obtaining sufficient detergency. This may be difficult.
Therefore, the amount of water added is more preferably set to a value in the range of 100 to 1500 parts by weight, and a value in the range of 150 to 900 parts by weight with respect to 100 parts by weight of the stock solution for the detergent composition. More preferably.

3. Liquid characteristic (1) Cloud point The cleaning composition of this invention has the cloud point in the range of 30-60 degreeC, It is characterized by the above-mentioned.
This is because when the cloud point is less than 30 ° C., the phase separation occurs when a predetermined amount of water is added to the stock solution for the detergent composition under non-washing temperature conditions. This is because it becomes difficult to obtain easy handling. On the other hand, when the cloud point exceeds 60 ° C., phase separation does not occur even under the washing temperature condition, so that it becomes difficult to exhibit excellent washing properties due to the cloudy state.
Therefore, it is preferable to make the cloud point in a cleaning composition into the value within the range of 32-55 degreeC, and it is more preferable to set it as the value within the range of 35-50 degreeC.
In addition, the cloud point in the cleaning composition of the present invention is determined by the types and blending ratios of the first organic solvent, the second organic solvent, etc. constituting the cleaning composition stock solution, and the cleaning composition stock solution. It can adjust with the compounding ratio of the water added with respect to.
The cloud point in the cleaning composition can be measured as the temperature (° C.) when the cleaning composition is gradually warmed up while observing the appearance of the cleaning composition and begins to become cloudy or phase-separated. it can.

(2) Flash point and combustion point The cleaning composition of the present invention does not have a flash point, or even if it has a flash point, its temperature is set to a value of 40 ° C or higher, and the combustion point. Is preferably 60 ° C. or higher.
This is because if the flash point is 40 ° C. or higher and the combustion point is 60 ° C. or higher, the fire point is no longer a hazardous material.
However, if the flash point and the combustion point of the cleaning composition are excessively high, the types and blending amounts of the usable first and second organic solvents may be excessively limited.
Therefore, even when the cleaning composition has a flash point, the temperature is more preferably set to a value in the range of 45 to 150 ° C, and further to a value in the range of 50 to 100 ° C. preferable.
Moreover, it is more preferable to make the combustion point of a cleaning composition into the value within the range of 70-200 degreeC, and it is further more preferable to set it as the value within the range of 80-150 degreeC.
In addition, as described in Example 1, the flash point of the cleaning composition can be measured according to JIS K 2265-1 and 4 (how to determine the flash point).

[Third Embodiment]
In the third embodiment, with respect to 100 parts by weight of the stock solution for the detergent composition, water in the range of 40 to 1900 parts by weight is added, and the detergent composition has a cloud point in the range of 30 to 60 ° C. A cleaning composition preparatory step, and a cleaning step of cleaning an object to be cleaned in a cloudy state while maintaining the resulting cleaning composition at a temperature equal to or higher than the cloud point of the cleaning composition. Wherein the stock solution for the detergent composition contains the first and second organic solvents as the organic solvent, and the first organic solvent is a compound represented by the following general formula (1) And the second organic solvent is a hydrophilic amine compound, and the blending amount of the second organic solvent is in the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent. The cleaning method is characterized in that the value of

(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2. )

1. Cleaning composition preparation step In the cleaning composition preparation step, water in the range of 40 to 1900 parts by weight is added to 100 parts by weight of the stock solution for cleaning composition, and clouding in the range of 30 to 60 ° C. It is a step of preparing a cleaning composition having a point.
In addition, when implementing a cleaning composition preparation process, it is preferable to use a well-known mixer and stirring apparatus.

2. Cleaning Step The cleaning step is a step of cleaning the object to be cleaned in a cloudy state while maintaining the obtained cleaning composition at a temperature equal to or higher than the cloud point of the cleaning composition.
In addition, the cleaning mode is not particularly limited, and various modes such as a dipping method, a peristaltic method, an ultrasonic vibration method, a shower cleaning method, and a submerged jet method can be employed.
It is also preferable to clean the flux in a state where the cleaning composition is impregnated or adhered to a brush, a cleaning roll or the like.
In carrying out the cleaning step, more specifically, it is preferable to use a cleaning device described later.

Further, the cleaning temperature is not particularly limited as long as it is a temperature equal to or higher than the cloud point of the cleaning composition, but it is usually preferable to be within a range of 30 to 60 ° C.
The cleaning time is preferably within a range of 10 seconds to 60 minutes.
In addition, it is preferable to make a cleaning composition into a stirring state from a viewpoint of maintaining a cloudy state stably.
More specifically, it is preferable to use a propeller stirrer, a magnetic stirrer, or the like to set the number of rotations in a range of 30 to 1000 rpm and bring the cleaning composition into a stirring state.

3. Rinsing Step The cleaning composition of the present invention is a composition obtained by adding a predetermined amount of water to the stock solution for the cleaning composition, but basically has excellent drying properties. The rinsing step can be omitted.
However, in the cleaning of electronic parts and substrates, it is also preferable to provide a rinsing step because electric corrosion or the like may occur in the electronic parts or substrates due to the remaining cleaning composition.
In this case, it is preferable to use an alcohol solvent as the rinse liquid.
This is because the amine compound can be effectively removed while being able to dry faster than water.

More specifically, as alcohol solvents, methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol, isobutyl alcohol, t-butyl alcohol, s-butyl alcohol, amino alcohol, 1-methoxy-2- It is preferable to use one kind of alcohol such as propanol or two or more kinds of alcohols.
Moreover, it is preferable to use an alcohol solvent to which a predetermined amount of water is added to these alcohols, and more specifically, water is added so as to be 40 to 70% by weight with respect to the total amount. It is preferable to use an alcohol solvent.
In addition, as rinse conditions, it is more preferable to carry out the rinse process in two steps within the range of 5-40 degreeC and 1 second-30 minutes. The reason for this is to reduce the amount of surfactant and amine compound residue.
However, when removing the flux adhering to the solder processing equipment etc., the problem of deterioration of electrical characteristics of electronic parts and substrates due to the remaining surfactant etc. is extremely small, so the rinsing process can be omitted or simplified It can be made.

4). Cleaning Device When performing the cleaning method using the cleaning agent composition, as the flux cleaning device 10 to be used, as shown in FIG. 1A, for example, an ultrasonic vibrator 29 for ultrasonic cleaning is used. It is preferable that the cleaning tank 12 provided, the rinse tank 14, and the drying tank 16 are provided.
More specifically, the cleaning tank 12 includes a housing 12a, a container 20 for an object to be cleaned 23, an ultrasonic vibrator 29, a cleaning liquid stirring device (not shown), and a heater 19 with a thermostat. It is preferable that the ultrasonic vibrator 29 applies ultrasonic vibration to the cleaning liquid 21 that is stirred and circulated to efficiently clean the object 23 to be cleaned.

  As shown in FIG. 1B, the cleaning tank 12 includes a housing 12a, a container 20 for an object to be cleaned 23, an ultrasonic vibrator 29, a cleaning liquid stirring device (not shown), It is also preferable to comprise a heater 19 with a thermostat and a circulation path 22 for circulating the cleaning liquid 21. That is, the partially contaminated cleaning liquid 21 can be circulated by the pump 24, and the cleaning liquid 21 can be regenerated in the filter 28 provided in the circulation path 22 and the salt-forming compound container 26. .

Next, in the rinsing tank 14, it is preferable to further remove the flux and the like from the object 23 to be cleaned, remove the cleaning liquid 21, and further evaporate the rinsing liquid 15 and the like in the drying tank 16.
That is, by using such a cleaning apparatus 10, the electronic component or the substrate subjected to the soldering process is cleaned using the cleaning composition of the present invention, and the flux adhering to them is efficiently removed. be able to.

5. Object to be cleaned In carrying out the cleaning method using the cleaning composition, the type of the object to be cleaned to which the cleaning composition is applied is not particularly limited, but it is not limited to soldered electronic parts and substrates. Of course, even if it is not soldered, a part having an influence of flux can be suitably used. Therefore, for example, a printed circuit board, a ceramic wiring board, a semiconductor element (including semiconductor parts such as BGA, CSP, PGA, and LGA), a semiconductor element mounting board, a bumped TAB tape, a bumpless TAB tape, and a semiconductor element mounting TAB Specific examples include a tape, a lead frame, a capacitor, and a resistor.

  In these objects to be cleaned, the type of flux to be used is not particularly limited. For example, not only ordinary solder flux but also low VOC flux, lead-free solder flux, or high melting point solder. It is preferably a flux or a no-clean solder flux. That is, these solder fluxes usually have rosin as the main component, and include organic acid salts, glycidyl ether compounds, oxyacids, carboxylic acids (including dicarboxylic acids), anilides and thermosetting resins (for example, epoxy resins and This is because at least one compound of thermosetting acrylic resin) is often added. Therefore, if it is the cleaning composition of this invention, it can show the outstanding washing | cleaning property also to these solder flux as well as normal solder flux.

  There are no particular restrictions on the types of solder such as ordinary solder, high melting point solder, lead-free solder, and no-clean solder to which flux is added. For example, Sn-Ag, Sn-Ag-Cu Typical examples include Sn, Sn—Cu, Sn—Sb, Sn—Zn, Sn—Bi, and Pb—Sn.

  Hereinafter, the present invention will be described in detail with reference to examples. Needless to say, the present invention is not limited to the following description.

[Example 1]
1. Preparation of stock solution for cleaning composition In a container, dipropylene glycol dimethyl ether (DMFDG) represented by the following formula (4) as a first organic solvent (boiling point: 171 ° C., solubility in water: 37% by weight, SP value: 8.2, flash point: 65 ° C. 100 parts by weight, N-ethylethanolamine (MEM) as a second organic solvent (boiling point: 169 ° C., solubility in water: 100% by weight or more, SP Value: 11.4, flash point: 71 ° C.) 7.5 parts by weight, sufficiently mixed using a mixer as a stirrer, and uniformly stirred for the detergent composition of Example 1 The stock solution was used.
Table 1 shows the composition of the detergent composition stock solution of Example 1. When the names of the composition components are omitted, the abbreviations in parentheses described above are used (hereinafter, other examples, The same applies to the comparative example.)

2. Preparation of cleaning composition In a container, 100 parts by weight of the obtained stock solution for cleaning composition and 233.3 parts by weight of water are stored, and sufficiently stirred using a mixer as a stirring device. A cleaning composition was obtained.

3. Evaluation (1) Cloud point After accommodating 100 g of the obtained detergent composition in a 200 ml capacity beaker, the temperature was maintained at 20 ° C.
Next, the temperature of the cleaning composition was gradually raised while observing the appearance of the cleaning composition, and the temperature (° C.) at which the cloudiness or phase separation started was measured as the cloud point of the cleaning composition. The obtained results are shown in Table 1.

(2) Flash point JIS K2265-1: 2007 (flash point measurement method (tag sealing method)) and JIS K2265-4: 2007 (flash point) It was measured according to the point measurement method Cleveland open method)). The obtained results are shown in Table 1.

(3) Detergency evaluation With respect to the JIS2 type comb substrate, through a metal mask, Eco Solder M705-GRN360-K2-V (manufactured by Senju Metal Industry Co., Ltd.) as a commercially available lead-free solder paste, Print applied.
Next, the comb-shaped substrate on which the solder paste was printed and applied was placed on a hot plate with a cover maintained at a temperature of 240 ° C., and the commercially available solder paste was reflowed to obtain a test piece.
On the other hand, 200 g of the obtained cleaning composition was placed in a beaker having a capacity of 300 ml, and then maintained at a temperature of 50 ° C.
Next, a plurality of test pieces are accommodated in a beaker containing a cleaning composition, and in that state, the magnetic stirrer is rotated to change the cleaning time while changing the cleaning time to make the cleaning composition cloudy. A cleaning test was performed.
That is, for each predetermined cleaning time, the rotation of the magnetic stirrer was stopped, and any test piece was taken out from the cleaning agent, and dried for 10 minutes using a circulation oven maintained at 100 ° C.
Finally, the dried test piece is taken out from the circulation oven, and the surface is observed using a stereomicroscope (magnification 40), and the time during which the solder paste can be completely washed (washing time) is measured. Detergency was evaluated against the criteria. The obtained results are shown in Table 1.
A: The cleaning time is less than 7 minutes.
○: Cleaning time is less than 7 to 10 minutes.
Δ: Cleaning time is less than 10 to 30 minutes.
X: Cleaning time is 30 minutes or more.

Moreover, as a commercially available lead-free solder paste, Eco Solder S70G Type 4 (manufactured by Senju Metal Industry Co., Ltd.), LF-204-GD14S (6) (manufactured by Tamura Corporation), SN100C P502 D4 (Nihon Superior Co., Ltd.) In the case where LFM-48W / UNH (D) (manufactured by Nippon Almit Co., Ltd.) was used as a commercially available halogen-free solder paste, the detergency was similarly evaluated. The obtained results are shown in Table 1.
In Table 1, Ecosolder M705-GRN360-K2-V is “M705”, Ecosolder S70G Type4 is “S70G”, LF-204-GD14S (6) is “LF-204”, and SN100C P502 D4 is “ SN100C ”and LFM-48W / UNH (D) are written as“ LFM ”.

(4) Evaluation of recovery rate Moreover, 5000 g of the obtained detergent composition was used under the conditions of a reduced pressure value of -0.08 MPa and 100 ° C using a vacuum distillation apparatus uniquely created in consideration of gas-liquid equilibrium. Distillation regeneration was performed until the distillation stopped.
And the recovery rate of the stock solution for cleaning composition in that case was calculated | required, and the recovery rate was evaluated as evaluation of the reproduction | regeneration efficiency of cleaning composition in light of the following references | standards. The obtained results are shown in Table 1.
A: The recovery rate is a value exceeding 90% by weight and not more than 100% by weight.
○: The recovery rate is more than 70% by weight and 90% by weight or less.
(Triangle | delta): A recovery rate is a value of 70 weight% or less exceeding 50 weight%.
X: The recovery rate is a value of 50% by weight or less.

(5) Dryability evaluation After 200 g of the obtained cleaning composition was contained in a beaker having a capacity of 300 ml, the temperature was maintained at 50 ° C.
Next, the glass epoxy substrate is placed in a beaker containing 200 g of the cleaning composition, and in that state, the magnetic stirrer in the beaker is rotated to perform a cleaning test for 30 minutes while making the cleaning composition cloudy. went.
Next, the rotation of the magnetic stirrer was stopped, the glass epoxy substrate was taken out from the cleaning agent, and drying was performed for a predetermined time using a circulation oven maintained at 100 ° C.
Thereafter, the dried glass epoxy substrate was taken out from the circulation oven, visually observed on the surface, and the drying property of the cleaning composition was evaluated in light of the following criteria. The obtained results are shown in Table 1.
A: Drying is possible within 5 minutes.
○: It can be dried within 10 minutes.
Δ: After drying for 10 minutes, there is a little liquid residue.
X: There is much liquid residue after drying for 10 minutes.

(6) Odor Evaluation After 200 g of the obtained cleaning composition was contained in a beaker having a capacity of 300 ml, the temperature was maintained at 50 ° C.
While rotating the magnetic stirrer in the beaker to make the cleaning composition cloudy, sensory evaluation was performed on the odor of each sample by 10 panelists, and the overall evaluation of 10 persons was compared with the following criteria, The odor of the cleaning composition was evaluated. The obtained results are shown in Table 1.
A: There is little odor and there is no problem in work.
○: The odor is slightly annoying, but there is no problem in work.
(Triangle | delta): A smell is quite felt and there exists a problem on work.
X: There is a strong odor and there is a significant problem in work.

(7) Ease of handling In view of the following criteria, the ease of handling of the cleaning composition was evaluated. The obtained results are shown in Table 1.
A: Since the liquid does not separate and become cloudy at room temperature (30 ° C.), there is no problem in work and handling in storage, storage, sampling, liquid analysis, and the like.
○: At room temperature (30 ° C.), the liquid begins to separate and become cloudy, but there are almost no problems in work and handling in storage, storage, sampling, liquid analysis, and the like.
Δ: At room temperature (30 ° C.), since the liquid is separated and cloudy, there are problems in work and handling in storage, storage, sampling, liquid analysis, and the like.
X: Since separation of liquid is remarkable at room temperature (30 ° C.), problems in operation and handling in storage, storage, sampling, liquid analysis, etc. occur remarkably.

[Example 2]
In Example 2, the blending amount of the second organic solvent was changed to 13.2 parts by weight, and ethylene glycol monoisobutyl ether (iBG) represented by the following formula (5) (boiling point: 161) as the third organic solvent. C., solubility in water: 100% by weight or more, SP value: 9.1, flash point: 57.degree. And evaluated.
Further, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 150 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Example 3]
In Example 3, the blending amount of the second organic solvent was changed to 11.1 parts by weight, and 100 parts by weight of ethylene glycol monoisobutyl ether (iBG) represented by the formula (5) was blended as the third organic solvent. Further, a stock solution for a detergent composition was prepared and evaluated in the same manner as in Example 1 except that 11.1 parts by weight of water was further added.
Further, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 150 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.
Moreover, the photograph which shows the external appearance when leaving the cleaning composition of Example 3 in a 20 degreeC environment is shown to Fig.2 (a), and the photograph which shows the external appearance when leaving in a 50 degreeC environment is shown. Shown in 2 (b).

[Example 4]
In Example 4, N-methylethanolamine (MMA) (boiling point: 160 ° C., solubility in water: 100% by weight or more, SP value: 12.0, flash point: 74 ° C.) was used as the second organic solvent. 7 parts by weight, and 3-methoxy-3-methyl-1-butanol (MMB) represented by the following formula (6) as a third organic solvent (boiling point: 174 ° C., solubility in water: 100% by weight) The SP value: 10.5, flash point: 68 ° C. is 38.3 parts by weight and propylene glycol monobutyl ether (BFG) represented by the following formula (7) (boiling point: 171 ° C., solubility in water: 6 A stock solution for a detergent composition was prepared and evaluated in the same manner as in Example 1 except that 16.7 parts by weight of .4 wt%, SP value: 9.0, and flash point: 62 ° C. were blended.
In addition, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 66.7 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Example 5]
In Example 5, while changing the compounding quantity of a 2nd organic solvent to 11.1 weight part, 47.6 weight of ethylene glycol monoisobutyl ether (iBG) represented by Formula (5) as a 3rd organic solvent is used. A stock solution for a detergent composition was prepared and evaluated in the same manner as in Example 1 except that the components were mixed.
In addition, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 400 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Example 6]
In Example 6, as the first organic solvent, diethylene glycol diethyl ether (DEDG) represented by the following formula (8) (boiling point: 189 ° C., water solubility: 100% by weight or more, SP value: 8.9, ignition point) (Point: 70 ° C.) 50 parts by weight and 50 parts by weight of dipropylene glycol dimethyl ether (DMFDG) represented by the formula (4), and 2 parts by weight of N-methylethanolamine (MMA) as the second organic solvent Except for blending, a stock solution for a detergent composition and a detergent composition were prepared and evaluated in the same manner as in Example 1. The obtained results are shown in Table 1.

[Example 7]
In Example 7, the blending amount of the second organic solvent was changed to 10 parts by weight, and 90 parts by weight of propylene glycol monobutyl ether (BFG) represented by the formula (7) was blended as the third organic solvent. In the same manner as in Example 1, a stock solution for a cleaning composition was prepared and evaluated.
Further, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 900 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Example 8]
In Example 8, the blending amount of the second organic solvent was changed to 50 parts by weight, and propylene glycol monopropyl ether (PFG) represented by the following formula (9) (boiling point: 150 ° C., as the third organic solvent). A stock solution for a detergent composition was prepared and evaluated in the same manner as in Example 1 except that 100 parts by weight of solubility in water: 100% by weight or more, SP value: 9.6, flash point: 48 ° C.) were blended. .
Further, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 300 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[ Reference Example 9]
In Reference Example 9, the first organic solvent was changed to diethylene glycol diethyl ether (DEDG) represented by the formula (8), and N, N-diethylisopropanolamine (2FA) (boiling point: 159 ° C.) was used as the second organic solvent. , Water solubility: 100% by weight or more, SP value: 10.3, flash point: 44 ° C.) Compositions were made and evaluated. The obtained results are shown in Table 1.

[Example 10]
In Example 10, the blending amount of the second organic solvent was changed to 20 parts by weight, and 151.4 parts by weight of ethylene glycol monoisobutyl ether (iBG) represented by the formula (5) was blended as the third organic solvent. Furthermore, N-methylpyrrolidone (NMP) having a boiling point exceeding 190 ° C. as another organic solvent (boiling point: 204 ° C., solubility in water: 100% by weight or more, SP value: 11.2, flammability A stock solution for a cleaning composition and a cleaning composition were prepared and evaluated in the same manner as in Example 1 except that 14.3 parts by weight of (91 ° C.) was blended. The obtained results are shown in Table 1.

[Comparative Example 1]
In Comparative Example 1, the first organic solvent and the second organic solvent are not used, and the propylpropylene glycol (PFG) represented by the formula (9) as the third organic solvent is used for the cleaning composition. Except for the stock solution, a stock solution for a detergent composition and a detergent composition were prepared and evaluated in the same manner as in Example 1. The obtained results are shown in Table 1.

[Comparative Example 2]
In Comparative Example 2, the first organic solvent is not used, the amount of the second organic solvent is changed to 15 parts by weight, and the other organic solvent having a boiling point exceeding 190 ° C. is represented by the following formula (10). 35 parts by weight of diethylene glycol monohexyl ether (HeDG) represented by the formula (boiling point: 259 ° C., water solubility: 100 wt% or more, SP value: 9.7, flash point: 141 ° C.) and a third organic solvent 63.5 wt. Of diethylene glycol monobutyl ether (BDG) represented by the following formula (11) (boiling point: 231 ° C., solubility in water: 100 wt% or more, SP value: 9.5, flash point: 120 ° C.) A stock solution for a detergent composition and a detergent composition were prepared and evaluated in the same manner as in Example 1 except that the components were mixed. The obtained results are shown in Table 1.

[Comparative Example 3]
In Comparative Example 3, the first organic solvent was not used, the amount of the second organic solvent was changed to 6.7 parts by weight, and the propylene glycol monobutyl ether represented by the formula (7) was used as the third organic solvent. A stock solution for a detergent composition was prepared and evaluated in the same manner as in Example 1 except that 100 parts by weight of (BFG) was blended.
Further, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 150 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Comparative Example 4]
In Comparative Example 4, the first organic solvent was diethylene glycol dimethyl ether (DMDG) represented by the following formula (12) (boiling point: 162 ° C., water solubility: 100% by weight or more, SP value: 8.7, flash point) : 56 ° C.), and the same amount of the second organic solvent was changed to 1 part by weight, and a stock solution and a cleaning composition for the cleaning composition were prepared and evaluated in the same manner as in Example 1. The obtained results are shown in Table 1.

[Comparative Example 5]
In Comparative Example 5, the first organic solvent is not used, the amount of the second organic solvent is changed to 1 part by weight, and the following formula (1) is a compound slightly deviating from the general formula (1) as the other organic solvent. 13) tetraethylene glycol dimethyl ether (MTEM) (boiling point: 275 ° C., water solubility: 100 wt% or more, SP value: 9.8, flash point: 141 ° C.) In the same manner as in Example 1, a stock solution for a cleaning composition was prepared and evaluated.
Further, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 150 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Comparative Example 6]
In Comparative Example 6, a stock solution for a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that the amount of the second organic solvent was changed to 8.4 parts by weight.
A cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 11.1 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.
Moreover, the photograph which shows the external appearance when leaving the cleaning composition of the comparative example 6 in a 20 degreeC environment is shown to Fig.3 (a), and the photograph which shows the external appearance when leaving in a 50 degreeC environment is shown. This is shown in 3 (b).

[Comparative Example 7]
In Comparative Example 7, a stock solution for a detergent composition was prepared and evaluated in the same manner as in Example 1 except that the blending amount of the second organic solvent was changed to 5 parts by weight.
In addition, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 4661.9 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Comparative Example 8]
In Comparative Example 8, the blending amount of the second organic solvent was changed to 8.3 parts by weight, and the other organic solvent had a boiling point of 190 ° C. or less (boiling point: 152 ° C., solubility in water: 1 A stock solution for a detergent composition was prepared and evaluated in the same manner as in Example 1 except that 233.3 parts by weight of a weight percent or less, SP value: 9.3, flash point: 52 ° C.) were blended.
Further, a cleaning composition was prepared and evaluated in the same manner as in Example 1 except that 387.8 parts by weight of water was added to 100 parts by weight of the obtained stock solution for cleaning composition. The obtained results are shown in Table 1.

[Comparative Example 9]
In Comparative Example 9, the first organic solvent was changed to diethylene glycol diethyl ether (DEDG) represented by the formula (8), the second organic solvent was not blended, and the following formula ( 14) Dipropylene glycol monomethyl ether (MFDG) (boiling point: 187 ° C., water solubility: 100% by weight or more, SP value: 10.2, flash point: 76 ° C.) 23.1 parts by weight In the same manner as in Example 1, a detergent composition stock solution was prepared and evaluated.
In addition, a detergent composition was prepared and evaluated in the same manner as in Example 1 except that 25 parts by weight of water was added to 100 parts by weight of the obtained detergent composition stock solution. The obtained results are shown in Table 1.

* The compounding amount (parts by weight) of each component in the stock solution for the detergent composition indicates a value when the first organic solvent is 100 parts by weight.
* The value described in parentheses in the column of the amount of each component in the stock solution for the detergent composition indicates the weight ratio (% by weight) of each component with respect to the total amount of the detergent composition.
* The blending amount (parts by weight) of water in the cleaning composition indicates the blending amount of water with respect to 100 parts by weight of the stock solution for cleaning composition.
* The value described in parentheses in the column of the amount of water in the detergent composition is the weight ratio (% by weight) of the water blended with the stock solution for the detergent composition to the total amount of the detergent composition. Show.

According to the stock solution for a cleaning composition of the present invention, a stock solution for a cleaning composition containing a predetermined dialkyl glycol ether compound and a hydrophilic amine compound in a predetermined blending ratio as an organic solvent, Since it is a stock solution for a detergent composition that will have a cloud point in a predetermined range when water is added, by blending a predetermined amount of water, it is excellent in environmental safety, while having excellent cleaning properties and It has become possible to obtain a cleaning composition that can exhibit drying properties and is easy to handle.
Therefore, according to the undiluted solution for the cleaning composition of the present invention, the cleaning composition and the cleaning method using the same, excellent environmental safety can be obtained in cleaning flux residue, solder paste, etc. In addition, it is possible to exhibit excellent cleaning properties and drying properties, and it is possible to obtain excellent handling ease.
Therefore, it is possible to remove flux residue accurately and efficiently in products that require cleaning of electronic components and high-frequency circuit boards that require high reliability while giving consideration to environmental issues. became.

DESCRIPTION OF SYMBOLS 10: Cleaning apparatus 12: Cleaning tank 14: Rinse tank 15: Rinse liquid 16: Drying tank 21: Cleaning liquid 22: Circulation path 26: Salt formation compound accommodating part 28: Filter 29: Ultrasonic vibrator

Claims (11)

A detergent composition that becomes a detergent composition having a cloud point in the range of 30 to 60 ° C. when water in the range of 40 to 1900 parts by weight is added to 100 parts by weight of the stock solution for the detergent composition. A stock solution,
As the organic solvent, including the first and second organic solvents,
The first organic solvent is a compound represented by the following general formula (1):
The second organic solvent is a hydrophilic amine compound,
The blending amount of the second organic solvent is a value within the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent ,
A stock solution for a cleaning composition, wherein the solubility of the second organic solvent in water (measurement temperature: 20 ° C) exceeds 50% by weight .
(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2.)   The boiling point of the first organic solvent is set to a value within a range of 140 to 190 ° C, and the solubility in water (measurement temperature: 20 ° C) is set to a value exceeding 20% by weight. 1. A stock solution for the cleaning composition according to 1.   The stock solution for a cleaning composition according to claim 1 or 2, wherein the first organic solvent is dipropylene glycol dimethyl ether. Detergent compositions for stock according to any one of claims 1 to 3, characterized in that a value within the range of boiling point 140 to 190 ° C. of the second organic solvent.   The second organic solvent is at least one compound selected from the group consisting of N, N-diethylisopropanolamine, N-ethylethanolamine, N-methylethanolamine and monoisopropanolamine. Item 5. A stock solution for a cleaning composition according to any one of Items 1 to 4.   The SP value of the first organic solvent is set to a value within the range of 6.5 to 12, and the SP value of the second organic solvent is set to a value within the range of 8 to 15. Item 6. A stock solution for a cleaning composition according to any one of Items 1 to 5. As the third organic solvent, the compound represented by the following general formula (2) and the compound represented by the following general formula (3), or any one of them, and the blending amount of the third organic solvent, The value is within a range of 0 to 200 parts by weight (however, 0 part by weight is not included) with respect to 100 parts by weight of the first organic solvent. 4. A stock solution for the cleaning composition according to item.
(In General Formula (2), R ^{4 to} R ⁵ are each an independent substituent, R ⁴ is an alkyl group having 1 to 5 carbon atoms, R ⁵ is a normal ethylene group or an isopropylene group, The repeat number m is an integer of 1 to 3.)
(In general formula (3), R ⁶ is a hydrogen atom or a methyl group.)   The amount of the organic solvent having a boiling point exceeding 190 ° C. is 0 part by weight or 0 to 15 parts by weight (however, 0 part by weight is not included) with respect to 100 parts by weight of the first organic solvent. The stock solution for the detergent composition according to any one of claims 1 to 7, wherein the stock solution has a value within the range of   While containing water, let the compounding quantity of the said water be a value within the range of 1-25 weight part with respect to 100 weight part of said 1st organic solvents, The any one of Claims 1-8 characterized by the above-mentioned. A stock solution for a cleaning composition according to one item. A detergent composition having a cloud point in a range of 30 to 60 ° C., which is obtained by adding water in a range of 40 to 1900 parts by weight with respect to 100 parts by weight of a stock solution for a detergent composition,
The stock solution for cleaning composition contains first and second organic solvents as organic solvents,
The first organic solvent is a compound represented by the following general formula (1):
The second organic solvent is a hydrophilic amine compound,
The blending amount of the second organic solvent is a value within the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent ,
A detergent composition characterized in that the solubility of the second organic solvent in water (measurement temperature: 20 ° C.) exceeds 50% by weight .
(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2.) A detergent composition for preparing a detergent composition having a cloud point in the range of 30 to 60 ° C. by adding water in the range of 40 to 1900 parts by weight with respect to 100 parts by weight of the stock solution for the detergent composition A preparation process;
A cleaning step of cleaning an object to be cleaned in a cloudy state while maintaining the resulting cleaning composition at a temperature equal to or higher than the cloud point of the cleaning composition,
The stock solution for cleaning composition contains first and second organic solvents as organic solvents,
The first organic solvent is a compound represented by the following general formula (1):
The second organic solvent is a hydrophilic amine compound,
The blending amount of the second organic solvent is a value within the range of 0.1 to 100 parts by weight with respect to 100 parts by weight of the first organic solvent ,
A cleaning method, wherein the solubility of the second organic solvent in water (measurement temperature: 20 ° C.) exceeds 50% by weight .
(In General Formula (1), R ^{1 to} R ³ are each an independent substituent, R ¹ is an alkyl group having 1 to 4 carbon atoms, R ² is an isopropylene group, and R ³ is carbon. (It is an alkyl group of 1 to 3, and the repeating number n is an integer of 1 or 2.)