Detergent composition and undiluted solution for detergent composition

Abstract

The present disclosure aims to provide a cleaning agent composition and a stock solution for the cleaning agent composition that have excellent cleaning properties and excellent drying properties when cleaning flux residue in solder pallets, suppress the decrease in cleaning properties caused by contamination and the increase in the working environment burden due to odor in the cleaning agent composition, and have no flash point. [Solution] A detergent composition comprising a hydrophobic glycol ether, a normal paraffinic hydrocarbon, a hydrophilic amine compound, a hydrophilic glycol ether, and water, wherein the boiling point of the hydrophobic glycol ether is 190°C or higher and 260°C or lower, the boiling point of the normal paraffinic hydrocarbon is 190°C or higher and 260°C or lower, the boiling point of the hydrophilic amine compound is 150°C or higher and 190°C or lower, the boiling point of the hydrophilic glycol ether is 190°C or higher and 260°C or lower, and per 100 parts by mass of the hydrophobic glycol ether... A detergent composition wherein the content of the normal paraffin hydrocarbon is 20 parts by mass or more and 150 parts by mass or less, the content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is 5 parts by mass or more and 50 parts by mass or less, the content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether is 10 parts by mass or more and 60 parts by mass or less, and the content of water per 100 parts by mass of the total content of components other than water in the detergent composition is 100 parts by mass or more and 1900 parts by mass or less.

Description

Technical Field

[0001] The present invention relates to a cleaning agent composition and a stock solution for the cleaning agent composition.

Background Art

[0002] Conventionally, in a flow soldering process of inserting a leaded component into a through-hole of a printed circuit board and soldering, a "solder pallet" has been used for the purpose of thermally protecting parts other than the soldering part. In this flow soldering process, it is known that flux residues (hereinafter sometimes referred to as "flux residues") scatter and adhere not only to the soldering part (opening) but also to other parts of the "solder pallet".

[0003] If the solder pallet is used for soldering without being cleaned, flux residues will accumulate on the solder pallet. In particular, when flux residues accumulate on the cut edge of the opening of the solder pallet, the flux residues will go around inside the solder pallet, resulting in the adhesion of flux to unnecessary parts such as the substrate to be soldered, which may cause a decrease in the electrical reliability of the substrate and the like. Therefore, flux residues need to be removed with a cleaning agent, and various cleaning methods and cleaning agents have been proposed conventionally (Patent Documents 1 to 4).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

[0005] In recent years, there has been a demand for improved cleaning performance of flux residue in cleaning agent compositions. In particular, in the cleaning of solder pallets, flux residue accumulates on the surface of the solder pallet due to repeated use, and the flux residue is frequently exposed to high-temperature environments, making the contamination by flux residue stubborn. Therefore, there is a particular need for excellent cleaning performance of flux residue. Furthermore, for example, when the amount of contamination on the solder pallet is large, the cleaning performance of the cleaning agent composition tends to decrease as the amount of contamination present in the cleaning agent composition increases with use. For this reason, there is a demand for cleaning agent compositions that suppress the decrease in cleaning performance caused by contamination. In addition, from the viewpoint of safety during cleaning operations, there is a demand for cleaning agent compositions that do not have a flash point. Furthermore, in order to reduce the emission of volatile organic compounds (VOCs), detergent compositions with a high water content are required. However, it can be difficult for such detergent compositions to possess excellent cleaning properties, and in addition to the fact that cleaning properties tend to decrease due to the contamination of the aforementioned contaminants, it can also be difficult to provide excellent drying properties. Therefore, there is a need to suppress the decrease in cleaning properties due to the contamination of the aforementioned contaminants, and in addition to providing the aforementioned excellent flux residue cleaning properties, there is also a need to provide excellent drying properties.

[0006] However, conventional cleaning agent compositions have sometimes been difficult to create that possess sufficient cleaning power for removing flux residue from solder pallets, suppress the reduction in cleaning power caused by contamination of the flux residue, have excellent drying properties, and have no flash point. In addition, cleaning agent compositions have sometimes been prone to increasing the burden on the working environment due to odors caused by organic solvents contained in the cleaning agent composition.

[0007] This disclosure has been made in view of the above circumstances, and aims to provide a cleaning agent composition and a stock solution for the cleaning agent composition that have excellent cleaning properties and excellent drying properties when cleaning flux residue in solder pallets, suppress the decrease in cleaning properties caused by contamination and the increase in the working environment burden due to the odor of the cleaning agent composition, and have no flash point. [Means for solving the problem]

[0008] A detergent composition relating to one aspect of this disclosure is: A detergent composition comprising a hydrophobic glycol ether, a normal paraffinic hydrocarbon, a hydrophilic amine compound, a hydrophilic glycol ether, and water, The boiling point of the hydrophobic glycol ether is between 190°C and 260°C. The boiling point of the n-paraffinic hydrocarbon is between 190°C and 260°C. The boiling point of the hydrophilic amine compound is between 150°C and 190°C. The boiling point of the hydrophilic glycol ether is between 190°C and 260°C. The content of the normal paraffinic hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is 20 parts by mass or more and 150 parts by mass or less. The content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is 5 parts by mass or more and 50 parts by mass or less. The content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether is 10 parts by mass or more and 60 parts by mass or less. The amount of water in the detergent composition is 100 parts by mass or more and 1900 parts by mass or less, relative to 100 parts by mass of the total amount of components other than water.

[0009] A stock solution for a detergent composition according to one aspect of this disclosure is The stock solution for the above-mentioned detergent composition, It is used after being diluted with water to a ratio of 2 to 20 times by mass. [Effects of the Invention]

[0010] According to this disclosure, it is possible to provide a cleaning agent composition and a stock solution for the cleaning agent composition that have excellent cleaning properties and excellent drying properties when cleaning flux residue in solder pallets, suppress the decrease in cleaning properties caused by contamination and the increase in the working environment burden due to the odor of the cleaning agent composition, and have no flash point. [Modes for carrying out the invention]

[0011] [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described. [1] The detergent compositions of the present disclosure are: A detergent composition comprising a hydrophobic glycol ether, a normal paraffinic hydrocarbon, a hydrophilic amine compound, a hydrophilic glycol ether, and water, The boiling point of the hydrophobic glycol ether is between 190°C and 260°C. The boiling point of the aforementioned normal paraffinic hydrocarbon is between 190°C and 260°C. The boiling point of the hydrophilic amine compound is between 150°C and 190°C. The boiling point of the hydrophilic glycol ether is between 190°C and 260°C. The content of the normal paraffinic hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is 20 parts by mass or more and 150 parts by mass or less. The content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is 5 parts by mass or more and 50 parts by mass or less. The content of the hydrophilic glycol ether relative to 100 parts by mass of the hydrophobic glycol ether is 10 parts by mass or more and 60 parts by mass or less. The amount of water in the aforementioned detergent composition is 100 parts by mass or more and 1900 parts by mass or less, relative to 100 parts by mass of the total amount of components other than water.

[0012] This makes it possible to provide a cleaning agent composition that has excellent detergency even in cleaning flux residues on a solder pallet, has excellent drying properties, suppresses a decrease in detergency due to contamination and an increase in the working environment load caused by odors in the cleaning agent composition, and has no flash point, as well as a stock solution for the cleaning agent composition.

[0013] [2] In [1] above, at the temperature for cleaning the object to be cleaned, when standing, it is preferably separated into at least two or more layers including a first layer composed of an organic phase containing the hydrophobic glycol ether and the normal paraffin-based hydrocarbon, and a second layer composed of an aqueous phase containing the hydrophilic amine compound, the hydrophilic glycol ether, and water. This makes it possible to have even more excellent detergency in cleaning flux residues on a solder pallet, have even more excellent drying properties, more suppress a decrease in detergency due to contamination and an increase in the working environment load caused by odors in the cleaning agent composition, and provide a cleaning agent composition that has no flash point and a stock solution for the cleaning agent composition.

[0014] [3] In [1] or [2] above, the hydrophobic glycol ether is preferably at least one compound selected from the group consisting of dipropylene glycol monobutyl ether, dipropylene glycol monopropyl ether, ethylene glycol monohexyl ether, and diethylene glycol dibutyl ether. This makes it possible to have even more excellent detergency in cleaning flux residues on a solder pallet, have even more excellent drying properties, more suppress a decrease in detergency due to contamination and an increase in the working environment load caused by odors in the cleaning agent composition, and provide a cleaning agent composition that has no flash point and a stock solution for the cleaning agent composition.

[0015] [4] In any one of the above [1] to [3], the number of carbon atoms in the normal paraffin hydrocarbon is preferably 11 or more and 14 or less. By this, it has better detergency even in the cleaning of flux residues on the solder pallet, and also has better drying property, and further suppresses the decrease in detergency caused by the mixing of dirt and the increase in the working environment load due to the odor in the cleaning agent composition, and it becomes possible to provide a cleaning agent composition without a flash point and a stock solution for the cleaning agent composition.

[0016] [5] In any one of the above [1] to [4], the hydrophilic amine compound is preferably at least one compound selected from the group consisting of N-ethylethanolamine, N-methylethanolamine, N,N-diethylisopropanolamine, and monoisopropanolamine. By this, it has better detergency even in the cleaning of flux residues on the solder pallet, and also has better drying property, and further suppresses the decrease in detergency caused by the mixing of dirt and the increase in the working environment load due to the odor in the cleaning agent composition, and it becomes possible to provide a cleaning agent composition without a flash point and a stock solution for the cleaning agent composition.

[0017] [6] In any one of the above [1] to [5], the hydrophilic glycol ether is preferably at least one compound selected from the group consisting of diethylene glycol monoisobutyl ether, triethylene glycol dimethyl ether, diethylene glycol monoisopropyl ether, and diethylene glycol monobutyl ether. By this, it has better detergency even in the cleaning of flux residues on the solder pallet, and also has better drying property, and further suppresses the decrease in detergency caused by the mixing of dirt and the increase in the working environment load due to the odor in the cleaning agent composition, and it becomes possible to provide a cleaning agent composition without a flash point and a stock solution for the cleaning agent composition.

[0018] [7] In any of the above [1] to [6], it is preferable that the cleaning agent is for cleaning flux residue in a solder pallet. This makes it possible to provide a cleaning agent composition and a stock solution for the cleaning agent composition that have better cleaning performance and better drying performance when cleaning flux residue in a solder pallet, and that further suppress the decrease in cleaning performance due to contamination of dirt and the increase in the working environment burden due to the odor of the cleaning agent composition, and that have no flash point.

[0019] [8] The stock solution for the detergent composition of this disclosure is The stock solution for the detergent composition described in [1] to [7] above, It is used after being diluted with water to a ratio of 2 to 20 times by mass.

[0020] This makes it possible to provide a stock solution for a cleaning agent composition that has excellent cleaning properties and drying properties when cleaning flux residue on solder pallets, suppresses the decrease in cleaning properties caused by contamination and the increase in the working environment burden due to odor in the cleaning agent composition, and has no flash point.

[0021] [Details of the embodiments of this disclosure] One embodiment of this disclosure (hereinafter also referred to as "this embodiment") will be described below. However, this embodiment is not limited thereto. In this specification, the notation in the form of "A~Z" means the upper and lower limits of a range (i.e., A or greater and Z or less). If no unit is specified for A, and only a unit is specified for Z, the unit for A and the unit for Z are the same.

[0022] [Embodiment 1: Detergent composition] A cleaning agent composition according to one embodiment of this disclosure will be described. A detergent composition according to one embodiment of the present disclosure (hereinafter also referred to as "this embodiment") is A detergent composition comprising a hydrophobic glycol ether, a normal paraffinic hydrocarbon, a hydrophilic amine compound, a hydrophilic glycol ether, and water, The boiling point of the hydrophobic glycol ether is between 190°C and 260°C. The boiling point of the n-paraffinic hydrocarbon is between 190°C and 260°C. The boiling point of the hydrophilic amine compound is between 150°C and 190°C. The boiling point of the hydrophilic glycol ether is between 190°C and 260°C. The content of the normal paraffinic hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is 20 parts by mass or more and 150 parts by mass or less. The content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is 5 parts by mass or more and 50 parts by mass or less. The content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether is 10 parts by mass or more and 60 parts by mass or less. The amount of water in the detergent composition is 100 parts by mass or more and 1900 parts by mass or less, relative to 100 parts by mass of the total amount of components other than water.

[0023] This disclosure makes it possible to provide a cleaning agent composition and a stock solution for the cleaning agent composition that have excellent cleaning properties and excellent drying properties when cleaning flux residue in solder pallets, suppress the decrease in cleaning properties caused by contamination and the increase in the working environment burden due to the odor of the cleaning agent composition, and have no flash point. The reason for this is presumed to be as follows.

[0024] (a) In the detergent composition according to this embodiment, the boiling point of the hydrophobic glycol ether is 190°C or higher and 260°C or lower, the boiling point of the normal paraffinic hydrocarbon is 190°C or higher and 260°C or lower, and the boiling point of the hydrophilic glycol ether is 190°C or higher and 260°C or lower. This makes it possible to reduce odor in the detergent composition and improve the drying properties of the detergent composition.

[0025] (b) In the detergent composition according to this embodiment, the boiling point of the normal paraffinic hydrocarbon is 190°C or higher and 260°C or lower, and the content of the normal paraffinic hydrocarbon per 100 parts by mass of hydrophobic glycol ether is 20 parts by mass or higher and 150 parts by mass or lower. This makes it possible to suppress the decrease in cleaning performance caused by contamination by flux residue.

[0026] (c) In the detergent composition according to this embodiment, the boiling point of the hydrophilic amine compound is 150°C or higher and 190°C or lower, and the content of the hydrophilic amine compound per 100 parts by mass of hydrophobic glycol ether is 5 parts by mass or higher and 50 parts by mass or lower. This improves the detergent composition's ability to clean against contamination by flux residue and its drying properties, while also suppressing a decrease in detergent performance caused by contamination by flux residue.

[0027] (d) In the detergent composition according to this embodiment, the boiling point of the hydrophilic glycol ether is 190°C or higher and 260°C or lower, and the content of the hydrophilic glycol ether per 100 parts by mass of hydrophobic glycol ether is 10 parts by mass or higher and 60 parts by mass or lower. This makes it possible to improve the cleaning performance against contamination by flux residue in the detergent composition and to suppress the decrease in cleaning performance caused by contamination by flux residue.

[0028] (e) In the detergent composition according to this embodiment, the content of water is 100 parts by mass or more and 1900 parts by mass or less, relative to 100 parts by mass of the total content of components other than water in the detergent composition. This makes it possible to suppress the occurrence of the flash point in the detergent composition. It also makes it possible to reduce the amount of volatile organic compounds (VOCs) emitted.

[0029] As described above, this embodiment makes it possible to provide a cleaning agent composition and a stock solution for the cleaning agent composition that have excellent cleaning properties and excellent drying properties when cleaning flux residue in solder pallets, suppress the decrease in cleaning properties caused by contamination and the increase in the working environment burden due to the odor of the cleaning agent composition, and have no flash point.

[0030] ≪Composition of the cleaning agent composition≫ <Hydrophobic glycol ether> The detergent composition according to this embodiment contains a hydrophobic glycol ether, the boiling point of which is 190°C or higher and 260°C or lower. This reduces odor in the detergent composition and improves its drying properties. Preferably, the boiling point of the hydrophobic glycol ether is 208°C or higher and 255°C or lower. Here, "hydrophobic glycol ether" means a glycol ether whose water solubility is 50% by mass or less in an environment of 20°C. The hydrophobic glycol ether may be synthesized from known starting materials by known methods, or a commercially available product may be used as is.

[0031] The hydrophobic glycol ether is preferably at least one compound selected from the group consisting of dipropylene glycol monobutyl ether, dipropylene glycol monopropyl ether, ethylene glycol monohexyl ether, and diethylene glycol dibutyl ether. This makes it possible to further reduce odor in the detergent composition and to further improve the detergent properties and drying properties of the detergent composition.

[0032] The content of the hydrophobic glycol ether per 100 parts by mass of the detergent composition according to this embodiment is preferably 2 parts by mass or more and 30 parts by mass or less. This makes it possible to further reduce the odor of the detergent composition and to further improve the cleaning properties and drying properties of the detergent composition. The lower limit of the content of the hydrophobic glycol ether per 100 parts by mass of the detergent composition according to this embodiment is preferably 2 parts by mass or more, more preferably 3 parts by mass or more, and even more preferably 5 parts by mass or more. The upper limit of the content of the hydrophobic glycol ether per 100 parts by mass of the detergent composition according to this embodiment may be 30 parts by mass or less, 25 parts by mass or less, or 20 parts by mass or less. The content of the hydrophobic glycol ether per 100 parts by mass of the detergent composition according to this embodiment is more preferably 3 parts by mass or more and 25 parts by mass or less, and even more preferably 5 parts by mass or more and 20 parts by mass or less.

[0033] The content of the hydrophobic glycol ether in 100 parts by mass of the detergent composition according to this embodiment can be determined by gas chromatography analysis. The conditions for gas chromatography analysis are as follows. (Conditions for analysis) Equipment: Gas meter GC-14B (manufactured by Shimadzu Corporation) Detector: Thermal conductivity detector (TCD) Column: Thermon-3000 (manufactured by Shinwa Chemical Co., Ltd.) Evaporation chamber temperature: 160℃ Detector temperature: 160℃

[0034] <Normal paraffinic hydrocarbons> The detergent composition according to this embodiment contains a normal paraffinic hydrocarbon, the boiling point of which is 190°C or higher and 260°C or lower. This reduces odor in the detergent composition, improves its drying properties, and suppresses a decrease in cleaning performance caused by contamination with flux residue. Preferably, the boiling point of the normal paraffinic hydrocarbon is 196°C or higher and 253°C or lower. Here, a normal paraffinic compound is an alkane (C) whose molecular chain is linear. n H 2n+2 This means ). The above-mentioned normal paraffinic hydrocarbons may be synthesized from known starting materials by known methods, or commercially available products may be used as is.

[0035] The number of carbon atoms in the above-mentioned normal paraffinic hydrocarbon is preferably 11 or more and 14 or less. In other words, the above-mentioned normal paraffinic hydrocarbon is preferably at least one compound selected from the group consisting of n-undecane, n-dodecane, n-tridecane (n-tridecane), and n-tetradecane. This makes it possible to further reduce odor in the detergent composition, further improve the drying properties of the detergent composition, and further suppress the decrease in cleaning performance caused by contamination with dirt due to flux residue.

[0036] The content of the normal paraffin hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is 20 parts by mass or more and 150 parts by mass or less. This improves the drying properties of the detergent composition and suppresses the decrease in cleaning performance caused by contamination with flux residue. The lower limit of the content of the normal paraffin hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is preferably 21 parts by mass or more, more preferably 25 parts by mass or more, and even more preferably 30 parts by mass or more. The upper limit of the content of the normal paraffin hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is preferably 140 parts by mass or less, more preferably 120 parts by mass or less, and even more preferably 100 parts by mass or less. The content of the normal paraffin hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is preferably 21 parts by mass or more and 140 parts by mass or less, more preferably 25 parts by mass or more and 120 parts by mass or less, and even more preferably 30 parts by mass or more and 100 parts by mass or less.

[0037] The content of the above-mentioned normal paraffinic hydrocarbon per 100 parts by mass of the above-mentioned hydrophobic glycol ether can be determined by gas chromatography analysis. The conditions for gas chromatography analysis are as follows. (Conditions for analysis) Equipment: Gas meter GC-14B (manufactured by Shimadzu Corporation) Detector: Thermal conductivity detector (TCD) Column: Thermon-3000 (manufactured by Shinwa Chemical Co., Ltd.) Evaporation chamber temperature: 160℃ Detector temperature: 160℃

[0038] <Hydrophilic amine compounds> The detergent composition according to this embodiment contains a hydrophilic amine compound, the boiling point of which is 150°C or higher and 190°C or lower. This improves the detergent composition's ability to clean against flux residue and its drying properties. Preferably, the boiling point of the hydrophilic amine compound is 159°C or higher and 169°C or lower. Here, "hydrophilic amine compound" means an amine compound whose solubility in water is more than 50% by mass at a temperature of 20°C. The hydrophilic amine compound may be synthesized from known starting materials by known methods, or a commercially available product may be used as is.

[0039] The hydrophilic amine compound is preferably at least one compound selected from the group consisting of N-ethylethanolamine, N-methylethanolamine, N,N-diethylisopropanolamine, and monoisopropanolamine. This makes it possible to further improve the cleaning performance against contamination caused by flux residue in the cleaning agent composition.

[0040] The content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is preferably 5 parts by mass or more and 50 parts by mass or less. This improves the cleaning performance against contamination by flux residue in the cleaning agent composition and suppresses the decrease in cleaning performance caused by contamination by flux residue. The lower limit of the content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is preferably 6 parts by mass or more, more preferably 7 parts by mass or more, and even more preferably 10 parts by mass or more. The upper limit of the content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is preferably 49 parts by mass or less, more preferably 45 parts by mass or less, and even more preferably 40 parts by mass or less. The content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether is preferably 6 parts by mass or more and 49 parts by mass or less, more preferably 7 parts by mass or more and 45 parts by mass or less, and even more preferably 10 parts by mass or more and 40 parts by mass or less.

[0041] The content of the hydrophilic amine compound per 100 parts by mass of the hydrophobic glycol ether can be determined by the same method as the method for measuring "the content of the hydrophobic glycol ether per 100 parts by mass of the detergent composition according to this embodiment," except that the objects of measurement are "the hydrophobic glycol ether" and "the hydrophilic amine compound."

[0042] <Hydrophilic glycol ether> The detergent composition according to this embodiment contains a hydrophilic glycol ether, the boiling point of which is 190°C or higher and 260°C or lower. This reduces odor, suppresses the occurrence of flash points, and improves the drying properties of the detergent composition. Preferably, the boiling point of the hydrophilic glycol ether is 207°C or higher and 231°C or lower. Here, "hydrophilic glycol ether" means a glycol ether whose solubility in water is more than 50% by mass at an environment of 20°C. The hydrophilic glycol ether may be synthesized from known starting materials by known methods, or a commercially available product may be used as is.

[0043] The hydrophilic glycol ether is preferably at least one compound selected from the group consisting of diethylene glycol monoisobutyl ether, triethylene glycol dimethyl ether, diethylene glycol monoisopropyl ether, and diethylene glycol monobutyl ether. This results in the formation of an aqueous phase and an organic phase through two-phase separation, and the presence of the hydrophilic glycol in the organic phase makes it easier for water to be incorporated into the organic phase as well as the aqueous phase, thereby further improving the flash point and making it easier to extinguish.

[0044] The content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether is 10 parts by mass or more and 60 parts by mass or less. This improves the cleaning performance against contamination by flux residue in the cleaning agent composition and suppresses the decrease in cleaning performance caused by contamination by flux residue. The lower limit of the content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether is preferably 11 parts by mass or more, more preferably 12 parts by mass or more, and even more preferably 15 parts by mass or more. The upper limit of the content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether is preferably 59 parts by mass or less, more preferably 55 parts by mass or less, and even more preferably 50 parts by mass or less. The content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether is preferably 11 parts by mass or more and 59 parts by mass or less, more preferably 12 parts by mass or more and 55 parts by mass or less, and even more preferably 15 parts by mass or more and 50 parts by mass or less.

[0045] The content of the hydrophilic glycol ether per 100 parts by mass of the hydrophobic glycol ether can be determined by the same method as the method for measuring "the content of the hydrophobic glycol ether per 100 parts by mass of the detergent composition according to this embodiment," except that the objects of measurement are "the hydrophobic glycol ether" and "the hydrophilic glycol ether."

[0046] <Water> The above-mentioned detergent composition contains water. The water is not particularly limited as long as it is water used as a raw material for various industrial products. The water may be distilled water or deionized water. In one aspect of this embodiment, the electrical conductivity of the water may be 1 to 300 μS / cm or 1 to 100 μS / cm.

[0047] The amount of water in the detergent composition, relative to 100 parts by mass of the total amount of components other than water, is preferably 100 parts by mass or more and 1900 parts by mass or less. This improves the cleaning performance against contamination by flux residue and the drying performance of the detergent composition, while suppressing the occurrence of the flash point and the decrease in cleaning performance caused by contamination by flux residue. Furthermore, by having a water content of 100 parts by mass or more, the amount of VOCs emitted can be reduced. The lower limit of the amount of water in the detergent composition, relative to 100 parts by mass of the total amount of components other than water, is preferably 120 parts by mass or more, more preferably 150 parts by mass or more, and even more preferably 200 parts by mass or more. The upper limit of the amount of water in the detergent composition, relative to 100 parts by mass of the total amount of components other than water, is preferably 1500 parts by mass or less, more preferably 900 parts by mass or less, and even more preferably 700 parts by mass or less. The amount of water per 100 parts by mass of the total of the hydrophobic glycol ether, the normal paraffinic hydrocarbon, the hydrophilic amine compound, and the hydrophilic glycol ether is preferably 120 parts by mass or more and 1500 parts by mass or less, more preferably 150 parts by mass or more and 900 parts by mass or less, and even more preferably 200 parts by mass or more and 700 parts by mass or less.

[0048] The water content relative to 100 parts by mass of the total content of components other than water in the detergent composition can be determined by analysis using a Karl Fischer moisture meter. The conditions for analysis using a Karl Fischer moisture meter are as follows: (Analysis conditions for Karl Fischer moisture meter) Equipment: Karl Fischer moisture meter MKV-710 (manufactured by Kyoto Electronics Manufacturing Co., Ltd.) Measurement method: volumetric titration method Measurement temperature: 20℃

[0049] <Other ingredients> The cleaning agent composition according to this embodiment may consist of the hydrophobic glycol ether, the normal paraffinic hydrocarbon, the hydrophilic amine compound, the hydrophilic glycol ether, and the water, and may further contain other components as long as the effects of the present disclosure are not impaired. Examples of such other components include hydrophobic glycol ethers other than the hydrophobic glycol ether, normal paraffinic hydrocarbons other than the normal paraffinic hydrocarbon, hydrophilic amine compounds other than the hydrophilic amine compound, hydrophilic glycol ethers other than the hydrophilic glycol ether, surfactants, rust inhibitors, chelating agents, thickeners, wetting agents, evaporation retarders, antioxidants, ultraviolet absorbers, pigments, fragrances, and preservatives.

[0050] ≪Characteristics of the Detergent Composition≫ <Appearance of the cleaning agent composition> The cleaning agent composition according to this embodiment preferably separates into at least two or more layers when left standing at the temperature at which the object to be cleaned is cleaned, comprising a first layer consisting of an organic phase containing the hydrophobic glycol ether and the normal paraffinic hydrocarbon, and a second layer consisting of an aqueous phase containing the hydrophilic amine compound, the hydrophilic glycol ether, and water. This makes it possible to provide a cleaning agent composition and a stock solution for the cleaning agent composition that have better cleaning performance and better drying properties, and that further suppress the decrease in cleaning performance due to contamination and the increase in the working environment burden due to the odor of the cleaning agent composition, and have no flash point. The cleaning agent composition according to this embodiment preferably separates into at least two to three layers, including the first layer and the second layer, when left standing at the temperature at which the object to be cleaned is cleaned, and preferably separates into two layers. Here, "temperature at which the object to be cleaned is cleaned" means the temperature of the cleaning agent composition at which dirt (e.g., flux residue, etc.) can be removed from the object to be cleaned during the cleaning process. The temperature may be, for example, 20-70°C, 25-65°C, or 30-60°C. "Static period" means the time when the detergent composition is kept free from external forces other than gravity for 4 hours. More specifically, "static period" can also be understood as the time when the detergent composition is kept free from vibration, rotation, and stirring for 4 hours.

[0051] "The cleaning agent composition according to this embodiment separates into at least two layers when left standing at the temperature at which the object to be cleaned is to be cleaned, consisting of a first layer comprising an organic phase containing the hydrophobic glycol ether and the normal paraffinic hydrocarbon, and a second layer comprising an aqueous phase containing the hydrophilic amine compound, the hydrophilic glycol ether, and water," can be determined by visually observing the appearance of the cleaning agent composition.

[0052] <ph> The pH of the detergent composition according to this embodiment is not particularly limited, but may be, for example, 8 to 12.5, 8.5 to 12, or 9 to 11.5.

[0053] The above pH can be determined by diluting the detergent composition 100 times by mass with water (distilled water) to obtain a 100-fold diluted detergent composition, and then measuring the pH of this "100-fold diluted detergent composition" using a pH meter (Docu-PH, manufactured by Sartorius Corporation) at a measurement temperature of 25°C.

[0054] ≪Method for manufacturing a detergent composition≫ The method for producing the detergent composition according to this embodiment includes the steps of preparing the hydrophobic glycol ether, the normal paraffinic hydrocarbon, the hydrophilic amine compound, the hydrophilic glycol ether, and water, and adding the hydrophobic glycol ether, the normal paraffinic hydrocarbon, the hydrophilic amine compound, and the hydrophilic glycol ether to the water. Any method may be used for the "addition step". Examples of the "addition step" include adding the hydrophobic glycol ether, the normal paraffinic hydrocarbon, the hydrophilic amine compound, the hydrophilic glycol ether, and water to a flask, or adding the hydrophobic glycol ether, the normal paraffinic hydrocarbon, the hydrophilic amine compound, the hydrophilic glycol ether, and water on an industrial scale in a chemical plant or the like.

[0055] ≪Method for cleaning objects≫ The cleaning method for an object to be cleaned according to this embodiment is a cleaning method for an object to be cleaned, comprising bringing the cleaning agent composition into contact with the surface or gaps of the object to be cleaned.

[0056] The method for bringing the above-mentioned cleaning agent composition into contact with the surface or crevices of the object to be cleaned is not particularly limited. Such methods include, for example, immersion, coating, and spraying or showering, in air, under reduced pressure, or under pressure, at room temperature or under heating. When bringing the cleaning agent composition into contact with the surface or crevices of the object to be cleaned by immersion, operations such as stirring, ultrasonic treatment, bubbling, and agitation may be performed as needed. In this method, it is preferable to immerse the object to be cleaned in a cleaning agent tank into which the heated cleaning agent composition has been added for cleaning. The immersion time is preferably 1 minute to 60 minutes.

[0057] In one aspect of this embodiment, when cleaning the gaps in the object to be cleaned, it is preferable to spray the cleaning agent composition onto the object using a shower method. In this case, compared to agitation immersion cleaning, it tends to be easier to remove dirt in a short time while reducing the load on the object to be cleaned.

[0058] In the cleaning method for the object to be cleaned in this embodiment, the temperature of the cleaning agent composition is preferably 20 to 70°C, more preferably 25 to 65°C, and even more preferably 30 to 60°C.

[0059] Subsequently, the cleaning agent composition may be removed from the object to be cleaned by rinsing with water, aqueous alcohol, or aqueous glycol ether and drying. In one aspect of this embodiment, since the cleaning agent composition of the present invention has good drying properties, the cleaning agent composition may be removed from the object to be cleaned by drying, such as by air blowing or wiping with a cloth, without performing the above-mentioned rinsing.

[0060] The cleaning agent composition according to this embodiment can be suitably used to remove flux residue in solder pallets. That is, the cleaning agent composition according to this embodiment is preferably for cleaning flux residue in solder pallets.

[0061] [Embodiment 2: Undiluted solution for detergent composition] The stock solution for the detergent composition according to this embodiment will be described. The stock solution for the detergent composition of this embodiment is The stock solution for the detergent composition described in Embodiment 1, It is used after being diluted with water to a ratio of 2 to 20 times by mass.

[0062] This disclosure makes it possible to provide a stock solution for a cleaning agent composition that has excellent cleaning properties and drying properties when cleaning flux residue on solder pallets, suppresses the decrease in cleaning properties caused by contamination and the increase in the working environment burden due to odor in the cleaning agent composition, and has no flash point. It also makes it possible to reduce the emission of volatile organic compounds (VOCs). The cleaning agent composition according to Embodiment 1 can be obtained by diluting the above stock solution for the cleaning agent composition at the above-mentioned ratio. [Examples]

[0063] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

[0064] [Example 1] <<Preparation of cleaning agent composition>> Detergent compositions for samples 1-1 to 1-3, samples 2 to 7, samples 8-1 to 8-3, samples 9 to 14, sample 101-1, sample 101-2, and samples 102 to 113 were prepared as follows.

[0065] <Preparation steps> As raw materials for preparing the cleaning agent compositions for each sample, the following were prepared: hydrophobic glycol ether, normal paraffinic hydrocarbon, hydrophilic amine compound, hydrophilic glycol ether, and water. (Hydrophobic glycol ether) Dipropylene glycol monobutyl ether (BFDG): Manufactured by Nippon Emulsifier Co., Ltd. Dipropylene glycol monopropyl ether (PFDG): Manufactured by Nippon Emulsifier Co., Ltd. Ethylene glycol monohexyl ether (HeG): Manufactured by Nippon Emulsifier Co., Ltd. Diethylene glycol dibutyl ether (DBDG): Manufactured by Nippon Emulsifier Co., Ltd. Propylene glycol monobutyl ether (BFG): Manufactured by Nippon Emulsifier Co., Ltd. Dipropylene glycol dimethyl ether (DMFDG): Manufactured by Nippon Emulsifier Co., Ltd. Diethylene glycol mono-2-ethylhexyl ether (EHDG): Manufactured by Nippon Emulsifier Co., Ltd. Diethylene glycol monophenyl ether (PhDG): Manufactured by Nippon Emulsifier Co., Ltd. (Normal paraffinic hydrocarbons) n-Undecane: Manufactured by Fujifilm Wako Pure Chemical Corporation n-Dodecane: Manufactured by Fujifilm Wako Pure Chemical Corporation n-tetradecane: Manufactured by Fujifilm Wako Pure Chemical Corporation n-decane: Manufactured by Fujifilm Wako Pure Chemical Corporation n-Tridecane: Manufactured by Fujifilm Wako Pure Chemical Corporation n-Pentadecane: Manufactured by Fujifilm Wako Pure Chemical Corporation (Hydrophilic amine compounds) N-ethylethanolamine (MEM): Manufactured by Nippon Emulsifier Co., Ltd. N-methylethanolamine (MMA): Manufactured by Nippon Emulsifier Co., Ltd. N,N-Diethylisopropanolamine (2FA): Manufactured by Nippon Emulsifier Co., Ltd. Monoisopropanolamine (MIPA): Manufactured by Dow Chemical Japan Ltd. Nn-butyldiethanolamine (MBD): Manufactured by Nippon Emulsifier Co., Ltd. (Hydrophilic glycol ether) Diethylene glycol monoisobutyl ether (iBDG): Manufactured by Nippon Emulsifier Co., Ltd. Triethylene glycol dimethyl ether (DMTG): Manufactured by Nippon Emulsifier Co., Ltd. Diethylene glycol monoisopropyl ether (iPDG): Manufactured by Nippon Emulsifier Co., Ltd. Diethylene glycol monobutyl ether (BDG): Manufactured by Nippon Emulsifier Co., Ltd. Propylene glycol monomethyl ether (MFG): Manufactured by Nippon Emulsifier Co., Ltd. Triethylene glycol monobutyl ether (BTG): Manufactured by Nippon Emulsifier Co., Ltd. (water) distilled water

[0066] <Addition process> The raw materials other than distilled water (water) from the above raw materials were mixed in the compositions shown in Tables 1 to 11 to obtain a stock solution for the detergent composition. Next, the stock solution for the detergent composition was added to distilled water (water) so that the content of distilled water (water) was as shown in Tables 12 to 22.

[0067] [Table 1]

[0068] [Table 2]

[0069] [Table 3]

[0070] [Table 4]

[0071] [Table 5]

[0072] [Table 6]

[0073] [Table 7]

[0074] Table 8

[0075] Table 9

[0076] Table 10

[0077] Table 11

[0078] Table 12

[0079] Table 13

[0080] Table 14

[0081] Table 15

[0082] Table 16

[0083] Table 17

[0084] [Table 18]

[0085] [Table 19]

[0086] [Table 20]

[0087] [Table 21]

[0088] [Table 22]

[0089] By performing the above steps, cleaning agent compositions were prepared for samples 1-1 to 1-3, 2 to 7, 8-1 to 8-3, 9 to 14, 101-1, 101-2, and 102 to 113, each having the configurations shown in Tables 1 to 22.

[0090] ≪Characterization of Detergent Compositions≫ <Appearance of the cleaning agent composition> The appearance of the detergent composition for each sample was determined by the method described in Embodiment 1. The results obtained are shown in the "Appearance" column of Tables 12 to 22. In the "Appearance" column, "Two-layer separation" indicates that the composition was separated into two layers: an aqueous phase and an organic phase.

[0091] <Evaluation Test 1: Cleanliness> The cleaning performance of each sample's cleaning agent composition was evaluated using the following method. First, a solid was obtained by volatilizing the solvent component in the post-flux ("EC-19S-8" trademark, manufactured by Tamura Corporation) and solidifying the flux component. Next, 0.1 g of this solid was placed on the main surface of a glass fiber reinforced epoxy board, and the solid was heated at 150°C to melt it and obtain a test piece. Next, 200 g of the cleaning agent composition for each sample was placed in a 300 ml beaker, and the test piece was immersed in the cleaning agent composition while stirring at a temperature of 25°C and a stirring speed of 800 rpm. Next, the time required for the flux to completely dissolve was measured by visually observing the dissolution status of the flux at elapsed time intervals. Next, the cleaning performance of each sample's cleaning agent composition was evaluated based on this time and the following evaluation criteria. The obtained results are recorded in the "Evaluation Test 1: Cleaning Performance" column of Tables 12 to 22. An evaluation result of "A" or "B" means that the cleaning agent composition exhibits excellent cleaning properties, even when cleaning flux residue on a solder palette. (Evaluation Criteria) A: The washing time is less than 10 minutes. B: The washing time is between 10 and 20 minutes. C: The washing time is 20 minutes or more but less than 30 minutes. D: The washing time is 30 minutes or longer.

[0092] <Evaluation Test 2: Cleanability when contaminated with dirt> The cleaning performance of each sample's cleaning agent composition when contaminated with dirt was evaluated using the following method. First, the same solid content used in Evaluation Test 1 was dissolved in the cleaning agent composition for each sample. At that time, the concentration of the solid content was prepared to be 3% by mass. Next, the cleaning performance of each cleaning agent composition was evaluated using the same method as in Evaluation Test 1, except that the cleaning agent composition for each sample in which the solid content was dissolved was used. The results obtained are recorded in the "Evaluation Test 2: Cleaning Performance When Contaminated with Dirt" column of Tables 12 to 22. The fact that the decrease in cleaning performance when contaminated with dirt in Evaluation Test 2 compared to the cleaning performance in Evaluation Test 1 was kept to "B" means that the decrease in cleaning performance due to dirt contamination was suppressed.

[0093] <Evaluation Test 3: Drying Properties> The drying properties of each cleaning agent composition were evaluated using the following method. First, a glass fiber reinforced epoxy board was immersed in the cleaning agent composition for each sample for 30 minutes. Next, the glass fiber reinforced epoxy board was removed from the cleaning agent composition and dried for 5 minutes at room temperature using an air blower. Then, the drying properties of each cleaning agent composition were evaluated by visually observing the surface of the glass fiber reinforced epoxy board according to the following evaluation criteria. The results obtained are recorded in the "Evaluation Test 3: Drying Properties" column of Tables 12 to 22. An evaluation result of "A" or "B" means that the cleaning agent composition has excellent drying properties. (Evaluation Criteria) A: No liquid residue remains after a drying time of 5 minutes. B: After a drying time of 5 minutes, a small amount of liquid remains. C: After a drying time of 5 minutes, some liquid remains. D: A large amount of liquid remains after a drying time of 5 minutes.

[0094] <Evaluation Test 4: Odor> The odor of each detergent composition was evaluated using the following method. First, 200 g of each detergent composition was placed in a 300 ml beaker. Next, under conditions of a temperature of 25°C and a stirring speed of 800 rpm, the detergent composition was stirred while 10 panelists performed a sensory evaluation of the odor of each detergent composition from a distance of 5 cm. The overall evaluation of the odor of the detergent compositions was carried out by the 10 panelists according to the following criteria. The results obtained are recorded in the "Evaluation Test 4: Odor" column of Tables 12 to 22. An evaluation result of "A" or "B" means that the increase in the working environment burden due to the odor of the detergent composition is suppressed. (Criteria for overall evaluation) A: It has little odor and does not pose any problems during work. B: There is a slight odor, but it does not pose a problem for the work. C: An unpleasant odor is detected, which poses a problem for the work. D: There is a strong odor, which poses a significant problem for the work.

[0095] <Evaluation Test 5: Flash Point> For each sample of the cleaning agent composition, the flash point was measured using the Cleveland open-type flash detector in accordance with JIS K2265. The results obtained are recorded in the "Evaluation Test 5: Flash Point [°C]" column of Tables 12 to 22. An evaluation result of "None" means that there was no flash point. An evaluation result of, for example, "98" means that the flash point was 98°C.

[0096] The cleaning agent compositions of Samples 1-1 to 1-3, Samples 2 to 7, Samples 8-1 to 8-3, and Samples 9 to 14 correspond to the examples. The cleaning agent compositions of Samples 101-1, 101-2, and Samples 102 to 113 correspond to the comparative examples. It was found that the cleaning agent compositions of Samples 1-1 to 1-3, Samples 2 to 7, Samples 8-1 to 8-3, and Samples 9 to 14 possess superior cleaning and drying properties compared to the cleaning agent compositions of Samples 101-1, 101-2, and Samples 102 to 113, and also suppress the decrease in cleaning performance due to the inclusion of dirt and the increase in the working environment burden due to the odor of the cleaning agent composition, and exhibit exceptionally superior effects such as having no flash point.

[0097] Based on the above, it was confirmed that the cleaning agent compositions of Samples 1-1 to 1-3, Samples 2 to 7, Samples 8-1 to 8-3, and Samples 9 to 14 possess both excellent cleaning and drying properties, suppress the decrease in cleaning performance caused by the inclusion of dirt and the increase in the working environment burden due to the odor of the cleaning agent composition, and exhibit exceptionally excellent effects such as having no flash point.

[0098] As described above, embodiments and examples of the present invention have been explained, but it is also intended from the outset that the configurations of each of the above embodiments and examples may be combined as appropriate.

[0099] The embodiments and examples disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than the embodiments and examples described above, and all modifications within the meaning and scope of the claims are intended to be included.< / ph>

Claims

1. A detergent composition comprising a hydrophobic glycol ether, a normal paraffinic hydrocarbon, a hydrophilic amine compound, a hydrophilic glycol ether, and water, The boiling point of the hydrophobic glycol ether is between 190°C and 260°C. The boiling point of the aforementioned normal paraffinic hydrocarbon is between 190°C and 260°C. The boiling point of the hydrophilic amine compound is 150°C or higher and 190°C or lower. The boiling point of the hydrophilic glycol ether is between 190°C and 260°C. The content of the normal paraffinic hydrocarbon per 100 parts by mass of the hydrophobic glycol ether is 20 parts by mass or more and 150 parts by mass or less. The content of the hydrophilic amine compound relative to 100 parts by mass of the hydrophobic glycol ether is 5 parts by mass or more and 50 parts by mass or less. The content of the hydrophilic glycol ether relative to 100 parts by mass of the hydrophobic glycol ether is 10 parts by mass or more and 60 parts by mass or less. A detergent composition wherein the amount of water in the detergent composition is 100 parts by mass or more and 1900 parts by mass or less, relative to 100 parts by mass of the total amount of components other than water in the detergent composition.

2. The cleaning agent composition according to claim 1, wherein, when left standing at a temperature suitable for cleaning the object to be cleaned, it separates into at least two layers: a first layer consisting of an organic phase containing the hydrophobic glycol ether and the normal paraffinic hydrocarbon, and a second layer consisting of an aqueous phase containing the hydrophilic amine compound, the hydrophilic glycol ether, and water.

3. The cleaning agent composition according to claim 1 or claim 2, wherein the hydrophobic glycol ether is at least one compound selected from the group consisting of dipropylene glycol monobutyl ether, dipropylene glycol monopropyl ether, ethylene glycol monohexyl ether, and diethylene glycol dibutyl ether.

4. The detergent composition according to claim 1 or claim 2, wherein the number of carbon atoms in the normal paraffin hydrocarbon is 11 or more and 14 or less.

5. The cleaning agent composition according to claim 1 or claim 2, wherein the hydrophilic amine compound is at least one compound selected from the group consisting of N-ethylethanolamine, N-methylethanolamine, N,N-diethylisopropanolamine, and monoisopropanolamine.

6. The cleaning agent composition according to claim 1 or claim 2, wherein the hydrophilic glycol ether is at least one compound selected from the group consisting of diethylene glycol monoisobutyl ether, triethylene glycol dimethyl ether, diethylene glycol monoisopropyl ether, and diethylene glycol monobutyl ether.

7. A cleaning agent composition according to claim 1 or claim 2, for cleaning flux residue in a solder palette.

8. A stock solution for a detergent composition according to claim 1 or claim 2, A stock solution for detergent compositions, which is used after being diluted with water to a mass ratio of 2 to 20 times or less.

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