Detergent composition, and undiluted solution for the detergent composition

Abstract

To provide a detergent composition having excellent flux cleaning and handling properties and reduced metallic effects and volatile organic compounds (VOC), and a concentrate solution for the detergent composition.SOLUTION: A detergent composition comprises a hydrophilic glycol ether compound, an organic acid, a first compound, and water. The first compound is a hydrophilic nitrogen-containing organic compound and / or a hydrophilic quaternary ammonium salt, the content of the water is 20 mass% or more, and the molar ratio of the first compound to the organic acid is 1 or greater and 35 or smaller.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a detergent composition and a stock solution for the detergent composition. [Background technology]

[0002] It has been known for a long time that when soldering electronic components such as integrated circuits (ICs) and capacitors to printed circuit boards, camera module components, etc., flux is scattered from the solder paste and adheres to the area around the electrodes as residue (hereinafter, the above-mentioned flux residue may be referred to as "flux residue").

[0003] Flux residue can cause corrosion at solder joints, lead to poor bonding during wire bonding, and cause poor adhesion with the mold resin during resin encapsulation. Therefore, flux residue needs to be removed with a cleaning agent, and various cleaning agents have been proposed to date (Patent Documents 1, 2, and 3). [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 05-105899 [Patent Document 2] Japanese Patent Publication No. 2002-201492 [Patent Document 3] Japanese Patent Application Publication No. 05-043897 [Overview of the project] [Problems that the invention aims to solve]

[0005] In recent years, there has been a demand for improved cleaning performance and handling of flux residue in detergent compositions. Furthermore, from the perspective of environmental safety, there is a demand for reducing volatile organic compounds (VOCs) in detergent compositions. However, conventional detergent compositions have sometimes found it difficult to simultaneously improve the cleaning performance and handling of flux residue and reduce volatile organic compounds (VOCs). Moreover, even when detergent compositions offer excellent cleaning performance and handling of flux residue and have reduced volatile organic compounds (VOCs), the organic acids contained in the detergent composition can easily cause corrosion (in other words, "metallic effects") of metals (e.g., zinc (Zn), iron (Fe)) contained in the object being cleaned.

[0006] The present invention has been made in view of the above circumstances, and aims to provide a cleaning agent composition that is excellent in flux cleaning properties and handling, and that has reduced metal effects and volatile organic compounds (VOCs), as well as a stock solution for the cleaning agent composition. [Means for solving the problem]

[0007] A detergent composition according to one aspect of the present disclosure is a detergent composition comprising a hydrophilic glycol ether compound, an organic acid, a first compound, and water, The first compound is a hydrophilic nitrogen-containing organic compound and / or a hydrophilic quaternary ammonium salt. The water content is 20% by mass or more. The molar ratio of the first compound to the organic acid is between 1 and 35.

[0008] A stock solution for a detergent composition according to one aspect of this disclosure is the stock solution for the detergent composition described above, The content of the hydrophilic glycol ether compound is 40% by mass or more and 98.8% by mass or less. The content of the organic acid is 0.1% by mass or more and 20% by mass or less. The content of the first compound is 1.1% by mass or more and 40% by mass or less. It is used diluted with water to a ratio of 1.1 to 20 times. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a detergent composition that is excellent in flux detergency and handleability, and has reduced metal impact and volatile organic compound (VOC) content, as well as a stock solution for the detergent composition. [Modes for Carrying Out the Invention]

[0010] [Description of Embodiments of the Present Disclosure] First, the embodiments of the present disclosure will be listed and described. [1] The detergent composition of the present disclosure is a detergent composition comprising a hydrophilic glycol ether compound, an organic acid, a first compound, and water, wherein the first compound is a hydrophilic nitrogen-containing organic compound and / or a hydrophilic quaternary ammonium salt, the content of the water is 20% by mass or more, and the molar ratio of the first compound to the organic acid is 1 or more and 35 or less.

[0011] Thereby, it is possible to provide a detergent composition that is excellent in flux detergency and handleability, and has reduced metal impact and volatile organic compound (VOC) content.

[0012] [2] In the above [1], the pH of the detergent composition is preferably 8.0 or more and 12.0 or less. Thereby, it is possible to provide a detergent composition that is further excellent in flux detergency and handleability, and has further reduced metal impact and volatile organic compound (VOC) content.

[0013] [3] In the above [1] or [2], the content of the organic acid is 0.1% by mass or more and 4.0% by mass or less, and the content of the first compound is preferably 1% by mass or more and 20% by mass or less. Thereby, it is possible to provide a detergent composition that is further excellent in flux detergency and handleability, and has further reduced metal impact and volatile organic compound (VOC) content.

[0014] [4] In any one of the above [1] to [3], the detergent composition is preferably uniform in appearance under the conditions of 25°C and 50°C. This makes it possible to provide a detergent composition that is further excellent in flux detergency and handleability, and has further reduced metal influence and volatile organic compound (VOC).

[0015] [5] In any one of the above [1] to [4], the organic acid is preferably an organic acid having one or more carboxy groups in one molecule, or an organic acid having one or more phosphonic acid groups in one molecule. This makes it possible to provide a detergent composition that is further excellent in flux detergency and handleability, and has further reduced metal influence and volatile organic compound (VOC).

[0016] [6] In any one of the above [1] to [5], the hydrophilic glycol ether compound is preferably a compound represented by formula (1) and having a water solubility of more than 50 mass% under an environment of 20°C, or a compound represented by formula (2) and having a water solubility of more than 50 mass% under an environment of 20°C. [Chemical Formula] (In formula (1), R 1 , R 2 and R 3 each independently represent a hydrogen atom, a methyl group, or an ethyl group, R 4 represents a linear and / or cyclic hydrocarbon group having 1 to 11 carbon atoms, -CH2- contained in the hydrocarbon group may be replaced by -O-, and in formula (2), R 5 and R 6 each independently represent a hydrogen atom or a methoxy group, any one of the R 5 and the R 6 is a methoxy group, and R 7 represents a hydrogen atom or a methyl group.) This makes it possible to provide a detergent composition with further excellent handleability.

[0017] [7] In the above [6], the hydrophilic glycol ether compound is preferably at least one compound selected from the group consisting of ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, ethylene glycol monoallyl ether, propylene glycol monopropyl ether, ethylene glycol monoisobutyl ether, ethylene glycol mono-tert-butyl ether, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, diethylene glycol monoisobutyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobenzyl ether, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, diethylene glycol diethyl ether, diethylene glycol isopropyl methyl ether, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, triethylene glycol dimethyl ether, diethylene glycol monohexyl ether, ethylene glycol monoisopropyl ether, 2-methoxybutanol, 3-methoxybutanol, 3-methoxy-3-methylbutanol, and propyl cellosolve. This makes it possible to provide a detergent composition with even better handling properties.

[0018] [8] In any of the above [1] to [7], the organic acid is a hydrophilic acid and / or a hydrophobic acid, The hydrophilic acid is at least one hydrophilic acid selected from the group consisting of nitrilotris (methylenephosphonic acid), tartaric acid, citric acid, malic acid, glycolic acid, propionic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, 1-hydroxyethane-1,1-diphosphonic acid, glycine, phytic acid, 1H-benzotriazole-4-carboxylic acid, 1H-benzotriazole-5-carboxylic acid, and p-toluenesulfonic acid. The hydrophobic acid is preferably at least one hydrophobic acid selected from the group consisting of diethylenetriaminepentaacetic acid, bicine, ethylenediaminetetra(methylenephosphonic acid), octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, lauric acid, alendronic acid, and 1-amino-2-naphthol-4-sulfonic acid. This makes it possible to provide a cleaning agent composition that is even better in flux cleaning properties and handling, and further reduces metal influence and volatile organic compounds (VOCs).

[0019] [9] In any of the above [1] to [8], The hydrophilic nitrogen-containing organic compound is a compound represented by formula (3) and having a water solubility of more than 50% by mass at an environment of 20°C, or a compound represented by formula (4) and having a water solubility of more than 50% by mass at an environment of 20°C. The hydrophilic quaternary ammonium salt is preferably a compound represented by formula (5) and having a water solubility of more than 50% by mass at an environment of 20°C. [ka] (In formula (3), R 8 R represents a -CH2CH2OH group, a -CH2CH(OH)CH3 group, a -CH2CH2CH2NH2 group, or a chain-like hydrocarbon group having 1 to 4 carbon atoms. 9 R represents a hydrogen atom, a -CH2CH2OH group, a -CH2CH2CH2NH2 group, or a -CH2CH(OH)CH3 group. 10 R represents a hydrogen atom, a -CH2CH2OH group, or a methyl group, and in formula (4), R 15 , R 16 , R 17 Each of these independently represents a hydrogen atom or a methyl group, and in formula (5), R 11 , R 12 , R 13 , R 14 Each of these independently represents a hydrocarbon group having 1 to 2 carbon atoms. This makes it possible to provide a cleaning agent composition that is even better in flux cleaning properties and handling, and further reduces metal influence and volatile organic compounds (VOCs).

[0020]

[10] In the above [9], the hydrophilic nitrogen-containing organic compound is at least one hydrophilic nitrogen-containing organic compound selected from the group consisting of monoisopropanolamine, 3,3'-diamino-N-methyldipropylamine, 3,3'-diaminodipropylamine, N-ethylethanolamine, diisopropanolamine, diethanolamine, Nn-butyldiethanolamine, triethanolamine, methyldiethanolamine, and 2-methylimidazole. The hydrophilic quaternary ammonium salt is preferably tetraethylammonium hydroxide. This makes it possible to provide a cleaning agent composition that has even better flux cleaning properties and handling properties, and further reduces metal influence and volatile organic compounds (VOCs).

[0021]

[11] Furthermore, the stock solution for the detergent composition of the present disclosure is the stock solution for the detergent composition described in [1] to

[10] above, The content of the hydrophilic glycol ether compound is 40% by mass or more and 98.8% by mass or less. The content of the aforementioned organic acid is 0.1% by mass or more and 20% by mass or less. The content of the first compound is 1.1% by mass or more and 40% by mass or less. It is used diluted with water to a ratio of 1.1 to 20 times.

[0022] This makes it possible to provide a cleaning agent composition that has excellent flux cleaning properties and handling capabilities, as well as reduced metal effects and volatile organic compounds (VOCs).

[0023] [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.

[0024] [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 hydrophilic glycol ether compound, an organic acid, a first compound, and water, The first compound is a hydrophilic nitrogen-containing organic compound and / or a hydrophilic quaternary ammonium salt. The water content is 20% by mass or more. The molar ratio of the first compound to the organic acid is between 1 and 35.

[0025] This disclosure makes it possible to provide a cleaning agent composition that is excellent in flux cleaning properties and handling, and has reduced metal effects and volatile organic compounds (VOCs). The reason for this is presumed to be as follows.

[0026] (a1) The cleaning agent composition of the present disclosure is a cleaning agent composition comprising a hydrophilic glycol ether compound, an organic acid, a first compound, and water, wherein the first compound is a hydrophilic nitrogen-containing organic compound and / or a hydrophilic quaternary ammonium salt, and the molar ratio of the first compound to the organic acid is 1 or more and 35 or less. The combination of the organic acid and the first compound (hydrophilic nitrogen-containing organic compound and / or hydrophilic quaternary ammonium salt) easily creates a polar environment. As a result, the stability of the salt formed with the organic acid during cleaning is increased. Consequently, in addition to the swelling and dissolution of flux residue by the first compound, the flux cleaning performance of the organic acid is improved by the formation of the salt, and the influence of metal is reduced because the organic acid is less likely to adsorb to metals contained in the object to be cleaned.

[0027] Furthermore, since the hydrophilic glycol ether and the first compound are hydrophilic, the solubility of the hydrophobic compound in water can be increased in the detergent composition. In addition, as described above, the combination of the organic acid and the first compound (hydrophilic nitrogen-containing organic compound and / or hydrophilic quaternary ammonium salt) forms a salt between the first compound and the organic acid, further improving the hydrophilicity of the first compound. Therefore, even when a hydrophobic compound is added to the detergent composition, the entire detergent composition tends to become uniform, and the detergent composition has excellent handling properties. In this application, the "handling properties" of the detergent composition are indicated when no additional work such as stirring due to separation is required, and when there are no restrictions on use due to the low safety of the detergent composition.

[0028] (b1) Furthermore, the water content in the detergent composition is 20% by mass or more. As a result, the water content in the detergent composition is sufficiently high, and therefore VOCs can be reduced.

[0029] As described above, the cleaning agent composition according to this embodiment has excellent flux cleaning properties and handling capabilities, and can reduce metal effects and volatile organic compounds (VOCs).

[0030] ≪Composition of the cleaning agent composition≫ <Hydrophilic glycol ether compounds> The above-mentioned detergent composition contains a hydrophilic glycol ether compound. This helps to suppress the separation of the detergent composition from water. In this embodiment, "glycol ether compound" means an ether compound of a dihydric alcohol. In this embodiment, "hydrophilic" means that the solubility of water in the target compound exceeds 50% by mass at a temperature of 20°C. Incidentally, "hydrophobic" means that the solubility of water in the target compound is 50% by mass or less at a temperature of 20°C. The above-mentioned hydrophilic glycol ether compound may be synthesized from known starting materials by known methods. The above-mentioned hydrophilic glycol ether compound may be a commercially available product used as is.

[0031] The hydrophilic glycol ether compound is preferably a compound represented by formula (1) and having a water solubility of more than 50% by mass at an environment of 20°C, or a compound represented by formula (2) and having a water solubility of more than 50% by mass at an environment of 20°C. [ka] (In formula (1), R 1 , R 2 and R 3 Each of these independently represents a hydrogen atom, a methyl group, or an ethyl group, and R 4 R represents a chain and / or cyclic hydrocarbon group having 1 to 11 carbon atoms, and the -CH2- contained in the hydrocarbon group may be replaced by -O-, in formula (2), 5 and R 6 Each of these independently represents a hydrogen atom or a methoxy group, and the R 5 and the R 6 Either of them is a methoxy group, R 7 (This represents a hydrogen atom or a methyl group.)

[0032] The above hydrophilic glycol ether compounds include ethylene glycol monomethyl ether (MG), ethylene glycol monobutyl ether (BC), ethylene glycol monoallyl ether (AG), propylene glycol monopropyl ether (PFG), ethylene glycol monoisobutyl ether (iBG), ethylene glycol mono-tert-butyl ether (ETB), propylene glycol monomethyl ether (MFG), dipropylene glycol monomethyl ether (MFDG), tripropylene glycol monomethyl ether (MFTG), diethylene glycol monomethyl ether (MDG), diethylene glycol monobutyl ether (BDG), diethylene glycol monoisobutyl ether (iBDG), diethylene glycol monoisopropyl ether (iPDG), diethylene glycol monobenzyl ether (BzDG), ethylene glycol dimethyl ether (DMG), diethylene glycol dimethyl ether (DMDG), and diethylene glycol It is preferable that the compound is at least one compound selected from the group consisting of ethyl methyl ether (MEDG), diethylene glycol diethyl ether (DEDG), diethylene glycol isopropyl methyl ether (IPDM), triethylene glycol monomethyl ether (MTG), triethylene glycol monobutyl ether (BTG), triethylene glycol dimethyl ether (DMTG), diethylene glycol monohexyl ether (HeDG), ethylene glycol monoisopropyl ether (iPG), 2-methoxybutanol (2MB), 3-methoxybutanol (3MB), 3-methoxy-3-methylbutanol (MMB), and propyl cellosolve (PC), and more preferably at least one compound selected from the group consisting of propyl cellosolve, 3-methoxy-3-methylbutanol, dipropylene glycol monomethyl ether, diethylene glycol ethyl methyl ether, and triethylene glycol monobutyl ether.

[0033] The content of the hydrophilic glycol ether compound is preferably 5% by mass or more and 78% by mass or less. This further improves the cleaning performance against flux residue. The lower limit of the content of the hydrophilic glycol ether compound is preferably 5% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more. The upper limit of the content of the hydrophilic glycol ether compound is preferably 78% by mass or less, more preferably 50% by mass or less, and even more preferably 30% by mass or less. The content of the hydrophilic glycol ether compound is preferably 5% by mass or more and 78% by mass or less, more preferably 15% by mass or more and 50% by mass or less, and even more preferably 20% by mass or more and 30% by mass or less.

[0034] The content of the above-mentioned hydrophilic glycol ether compound can be determined by gas chromatography analysis. The conditions for gas chromatography analysis are as follows: (Conditions for analysis) Equipment: Gas chromatograph 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℃

[0035] <Organic acid> The above-mentioned detergent composition contains an organic acid. In this embodiment, "organic acid" means an acidic organic compound containing a carboxyl group, a phosphonic acid group, a sulfo group, etc. The above-mentioned organic acid may be synthesized from known starting materials by known methods. The above-mentioned organic acid may be a commercially available product used as is.

[0036] The above organic acid is preferably an organic acid having one or more carboxyl groups in one molecule, or an organic acid having one or more phosphonic acid groups in one molecule. This allows it to exert a chelating effect on metal salts in flux residue and form a stable salt with the first compound, so that the cleaning agent composition according to this embodiment has excellent flux cleaning properties and handling capabilities, and can reduce the influence of metals.

[0037] The above organic acid is a hydrophilic acid and / or a hydrophobic acid, and the hydrophilic acid is preferably at least one hydrophilic acid selected from the group consisting of nitrilotris(methylenephosphonic acid), tartaric acid, citric acid, malic acid, glycolic acid, propionic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, 1-hydroxyethane-1,1-diphosphonic acid (HEDP), glycine, phytic acid, 1H-benzotriazole-4-carboxylic acid, 1H-benzotriazole-5-carboxylic acid, and p-toluenesulfonic acid, and the hydrophobic acid is preferably at least one hydrophobic acid selected from the group consisting of diethylenetriaminepentaacetic acid (DTPA), bicine (DHEG), ethylenediaminetetra(methylenephosphonic acid) (EDTMP), octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, lauric acid, alendronic acid, and 1-amino-2-naphthol-4-sulfonic acid. As a result, the cleaning agent composition according to this embodiment exhibits a chelating effect on metal salts in the flux residue and forms a stable salt with the first compound, thus providing excellent flux cleaning properties and handling capabilities, while also reducing the influence of metals. The organic acid is a hydrophilic acid and / or a hydrophobic acid, and the hydrophilic acid is at least one hydrophilic acid selected from the group consisting of nitrilotris(methylenephosphonic acid), tartaric acid, citric acid, malic acid, glycolic acid, propionic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, 1-hydroxyethane-1,1-diphosphonic acid (HEDP), and glycine, phytic acid, 1H-benzotriazole-4-carboxylic acid, and 1H-benzotriazole-5-carboxylic acid, and more preferably the hydrophobic acid is at least one hydrophobic acid selected from the group consisting of diethylenetriaminepentaacetic acid (DTPA), bicine (DHEG), ethylenediaminetetra(methylenephosphonic acid) (EDTMP), octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, lauric acid, and alendronic acid.Since these hydrophilic acids and hydrophobic acids are organic acids having one or more carboxyl groups in one molecule, or organic acids having one or more phosphonic acid groups in one molecule, they exhibit a chelating effect on metal salts in flux residue and form stable salts with the first compound. Therefore, the cleaning agent composition according to this embodiment has excellent flux cleaning properties and handling capabilities, and can reduce the influence of metals.

[0038] The content of the above organic acid is preferably 0.1% by mass or more and 4.0% by mass or less. This further improves flux cleaning properties and handling, and further reduces metal influence. The lower limit of the content of the organic acid is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more. The upper limit of the content of the organic acid is preferably 4.0% by mass or less, more preferably 2.0% by mass or less, and even more preferably 1.0% by mass or less. The content of the organic acid is preferably 0.1% by mass or more and 4.0% by mass or less, more preferably 0.3% by mass or more and 2.0% by mass or less, and even more preferably 0.5% by mass or more and 1.0% by mass or less.

[0039] The content of the above organic acids can be determined by potentiometric titration. The conditions for analysis by potentiometric titration are as follows: (conditions) Equipment: Potentiometric automatic titrator Model AT-710M (manufactured by Kyoto Electronics Manufacturing Co., Ltd.) Measurement temperature: 20℃

[0040] <First compound> The above cleaning agent composition contains a first compound, which is a hydrophilic nitrogen-containing organic compound and / or a hydrophilic quaternary ammonium salt. The saponification action of the hydrophilic nitrogen-containing organic compound and the hydrophilic quaternary ammonium salt cleaves the molecular structure of the resin constituting the flux, resulting in the resin becoming more easily soluble. Therefore, the flux cleaning properties and handling properties are further improved, and the influence of metals can be further reduced. The "first compound" may be synthesized from known starting materials by known methods. The "first compound" may also be a commercially available product used as is.

[0041] The above-mentioned hydrophilic nitrogen-containing organic compound is preferably a compound represented by formula (3) and having a water solubility of more than 50% by mass at an environment of 20°C, or a compound represented by formula (4) and having a water solubility of more than 50% by mass at an environment of 20°C. [ka] (In formula (3), R 8 R represents a -CH2CH2OH group, a -CH2CH(OH)CH3 group, a -CH2CH2CH2NH2 group, or a chain-like hydrocarbon group having 1 to 4 carbon atoms. 9 R represents a hydrogen atom, a -CH2CH2OH group, a -CH2CH2CH2NH2 group, or a -CH2CH(OH)CH3 group. 10 R represents a hydrogen atom, a -CH2CH2OH group, or a methyl group, and in formula (4), R 15 , R 16 , R 17 (Each of these independently represents either a hydrogen atom or a methyl group.)

[0042] The above hydrophilic nitrogen-containing organic compound is preferably at least one hydrophilic nitrogen-containing organic compound selected from the group consisting of monoisopropanolamine (primary amine), 3,3'-diamino-N-methyldipropylamine (primary amine), 3,3'-diaminodipropylamine (primary amine), N-ethylethanolamine (secondary amine), diisopropanolamine (secondary amine), diethanolamine (secondary amine), Nn-butyldiethanolamine (tertiary amine), triethanolamine (tertiary amine), methyldiethanolamine (tertiary amine), and 2-methylimidazole. This swells and dissolves the flux residue, further improving flux cleaning and handling properties, and further reducing metal influence.

[0043] The above-mentioned hydrophilic quaternary ammonium salt is preferably a compound represented by formula (5) and having a water solubility of more than 50% by mass at an environment of 20°C. [ka] (In formula (5), R 11 , R 12 , R 13 , R 14 These each independently represent a hydrocarbon group with 1 to 2 carbon atoms.

[0044] The hydrophilic quaternary ammonium salt mentioned above is preferably tetraethylammonium hydroxide (TEAH). This swells and dissolves the flux residue, resulting in improved flux cleaning and handling properties, as well as further reduction of metal influence.

[0045] The content of the first compound described above is preferably 1% by mass or more and 20% by mass or less. If the content is less than 1% by mass, there is a tendency for the cleaning performance to decrease and metal effects to occur more easily, and if the content is greater than 20% by mass, the pH tends to rise and the safety of workers is more likely to be compromised. Therefore, by adjusting the content of the first compound described above to the above range, the flux cleaning performance and handling properties can be further improved, and metal effects can be further reduced. The lower limit of the content of the first compound is preferably 1% by mass or more, more preferably 2% by mass or more, and even more preferably 4% by mass or more. The upper limit of the content of the first compound is preferably 20% by mass or less, more preferably 15% by mass or less, and even more preferably 10% by mass or less. The content of the first compound is preferably 1% by mass or more and 20% by mass or less, more preferably 2% by mass or more and 15% by mass or less, and even more preferably 4% by mass or more and 10% by mass or less.

[0046] The content of the above-mentioned first compound can be determined by potentiometric titration. The conditions for analysis by potentiometric titration are the same as those for the analysis of "organic acid content" described above.

[0047] The molar ratio of the first compound to the organic acid is 1 or more and 35 or less. This ensures that the amount of the first compound is sufficient relative to the organic acid, so that the organic acid binds with the first compound, preventing the organic acid from affecting the metal in the object being cleaned. The lower limit of the molar ratio is preferably 1 or more, more preferably 5 or more, and even more preferably 10 or more. The upper limit of the molar ratio is preferably 35 or less, more preferably 30 or less, and even more preferably 25 or less. The molar ratio is preferably 1 or more and 35 or less, more preferably 5 or more and 30 or less, and even more preferably 10 or more and 25 or less.

[0048] The molar ratio can be determined by calculating it based on the "content of the first compound" obtained by the method described above and the "content of the organic acid" obtained by the method described above.

[0049] <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, tap water, etc. 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.

[0050] The water content is 20% by mass or more. This makes it possible to reduce VOCs in the detergent composition according to this embodiment. The lower limit of the water content is preferably 25% by mass or more, more preferably 40% by mass or more, and even more preferably 60% by mass or more. The upper limit of the water content is preferably 93% by mass or less, more preferably 80% by mass or less, and even more preferably 75% by mass or less. The water content is preferably 20% by mass or more and 93% by mass or less, more preferably 40% by mass or more and 80% by mass or less, and even more preferably 60% by mass or more and 75% by mass or less.

[0051] The water content mentioned above 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 MKS-500 (manufactured by Kyoto Electronics Manufacturing Co., Ltd.) Measurement method: volumetric titration method Measurement temperature: 20℃

[0052] <Other ingredients> The cleaning agent composition according to this embodiment may further contain other components as long as the effects of the present invention are achieved. Examples of such other components include surfactants, rust inhibitors, pH adjusters, chelating agents, thickeners, wetting agents, evaporation retarders, antioxidants, ultraviolet absorbers, pigments, fragrances, and preservatives.

[0053] ≪Characteristics of the Detergent Composition≫ <ph> The pH of the above cleaning agent composition is preferably between 8.0 and 12.0. If the pH is less than 8.0, the cleaning performance and metal effects tend to be more easily observed in the cleaning agent composition, and if the pH is greater than 12.0, the safety of workers tends to be more easily compromised. Therefore, by adjusting the pH of the above cleaning agent composition to the above range, the flux cleaning performance and handling properties can be further improved, and metal effects can be further reduced. The lower limit of the pH of the above cleaning agent composition is preferably 8.0 or higher, more preferably 8.5 or higher, and even more preferably 9.0 or higher. The upper limit of the pH of the above cleaning agent composition is preferably 12.0 or lower, more preferably 11.0 or lower, and even more preferably 10.0 or lower. The pH of the above cleaning agent composition is preferably between 8.0 and 12.0, more preferably 8.5 or higher and even more preferably 9.0 or higher and even more preferably 10.0.

[0054] The pH of the above-mentioned detergent composition can be determined by the following method: specifically, by measuring it using a pH meter (Docu-PH, manufactured by Sartorius Corporation) at a measurement temperature of 25°C.

[0055] <Exterior> The aforementioned detergent composition is preferably uniform in appearance under conditions of 25°C and 50°C. This makes it easier to handle, as it does not require special restrictions such as stirring during storage, transportation, and use. Here, "uniform in appearance" means that the detergent composition does not separate into two or more layers in appearance when left standing. "Standing" means that the detergent composition is kept in a state where it is not subjected to any external force other than gravity for 4 hours. More specifically, "Standing" can also be understood as the detergent composition being kept in a state where it is not subjected to vibration, rotation, or stirring for 4 hours. In one aspect of this embodiment, the detergent composition may be uniform in appearance or may separate into two or more layers in appearance at temperatures other than 25°C and 50°C.

[0056] ≪Method for manufacturing a detergent composition≫ The method for producing the detergent composition according to this embodiment includes the steps of preparing the hydrophilic glycol ether compound, the organic acid, the first compound, and water, and adding the hydrophilic glycol ether compound, the organic acid, and the first compound to the water. Any method may be used for the addition step. Examples of the addition step include adding the hydrophilic glycol ether compound, the organic acid, the first compound, and the water to a flask, and adding the hydrophilic glycol ether compound, the organic acid, the first compound, and the water on an industrial scale in a chemical plant or the like.

[0057] ≪Method for cleaning objects≫ The cleaning method for the object to be cleaned according to this embodiment is: A method for cleaning an object to be cleaned, comprising bringing the cleaning agent composition into contact with the surface or gaps of the object to be cleaned.

[0058] The method for bringing the above-mentioned cleaning agent composition into contact with the surface or gaps 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 above-mentioned cleaning agent composition into contact with the surface or gaps 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 above-mentioned cleaning agent composition has been added for cleaning. The immersion time is preferably 1 minute to 60 minutes.

[0059] In one aspect of this embodiment, when cleaning the gaps between the objects to be cleaned, it is preferable to immerse the objects to be cleaned in the agitated cleaning agent composition. In this case, the load on the objects to be cleaned tends to be reduced compared to shower cleaning and ultrasonic cleaning.

[0060] 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 30 to 60°C, and even more preferably 40 to 50°C.

[0061] Subsequently, the cleaning agent composition can be removed from the object to be cleaned by rinsing with water, aqueous alcohol, or aqueous glycol ether and then drying.

[0062] The cleaning agent composition according to this embodiment can be suitably used to remove flux residue. That is, the cleaning agent composition is preferably for flux cleaning.

[0063] [Embodiment 2: Undiluted solution for detergent composition] A stock solution for a detergent composition according to one embodiment of this disclosure will be described. The stock solution for the detergent composition of one embodiment of this disclosure (hereinafter also referred to as "this embodiment") is The undiluted solution for the detergent composition according to this embodiment 1, The content of the hydrophilic glycol ether compound is 40% by mass or more and 98.8% by mass or less. The content of the organic acid is 0.1% by mass or more and 20% by mass or less. The content of the first compound is 1.1% by mass or more and 40% by mass or less. It is used diluted with water to a ratio of 1.1 to 20 times.

[0064] This disclosure makes it possible to provide a cleaning agent composition that is excellent in flux cleaning properties and handling, and has reduced metal effects and volatile organic compounds (VOCs). The cleaning agent composition according to Embodiment 1 can be obtained by diluting the stock solution for the above cleaning agent composition at the above-mentioned ratio (volume ratio). [Examples]

[0065] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

[0066] <<Preparation of cleaning agent composition>> Detergent compositions for samples 1 to 31, samples 33 to 54, and samples 101 to 106, sample 110, and sample 111 were prepared as follows.

[0067] <Preparation steps> To prepare the detergent compositions for Samples 1 to 31, Samples 33 to 54, and Samples 101 to 106, Sample 110, and Sample 111, the following hydrophilic glycol ether compounds, the following organic acids, the following hydrophilic nitrogen-containing organic compounds, the following quaternary ammonium salts, and the following water were prepared as raw materials. (Hydrophilic glycol ether compound) Propyl cellosolve: Manufactured by Dow Chemical Japan Ltd. 3-Methoxy-3-methylbutanol: Manufactured by Kuraray Co., Ltd. Dipropylene glycol monomethyl ether: Manufactured by Nippon Emulsifier Co., Ltd. Diethylene glycol ethyl methyl ether: Manufactured by Nippon Emulsifier Co., Ltd. Triethylene glycol monobutyl ether: Manufactured by Nippon Emulsifier Co., Ltd. (organic acid) Nitrilotrismethylenephosphonic acid (hydrophilic acid): Manufactured by Kirest Co., Ltd. Citric acid (hydrophilic acid): Manufactured by Fujifilm Wako Pure Chemical Corporation Malic acid (hydrophilic acid): Manufactured by Fujifilm Wako Pure Chemical Corporation Glycolic acid (hydrophilic acid): Manufactured by Chemours Co., Ltd. Propionic acid (hydrophilic acid): Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. 2-Phosphonobutane-1,2,4-tricarboxylic acid: Manufactured by Kirest Co., Ltd. HEDP (hydrophilic acid): Manufactured by Kirest Co., Ltd. Glycine (hydrophilic acid): Manufactured by Fujifilm Wako Pure Chemical Corporation p-Toluene sulfonic acid monohydrate (hydrophilic acid): Manufactured by Fujifilm Wako Pure Chemical Industries, Ltd. DTPA: Manufactured by Kirest Co., Ltd. DHEG: Manufactured by Kirest Co., Ltd. EDTMP: Manufactured by Kirest Co., Ltd. Lauric acid: Manufactured by Fujifilm Wako Pure Chemical Corporation Alendronate: Manufactured by Tokyo Chemical Industry Co., Ltd. 1-Amino-2-naphthol-4-sulfonic acid: Manufactured by Fujifilm Wako Pure Chemical Corporation (Hydrophilic nitrogen-containing organic compound) Monoisopropanolamine (primary amine): Manufactured by Tokyo Chemical Industry Co., Ltd. 3,3'-Diamino-N-methyldipropylamine (primary amine): Manufactured by Tokyo Chemical Industry Co., Ltd. N-ethylethanolamine (secondary amine): Manufactured by Nippon Emulsifier Co., Ltd. 2-Methylimidazole: Manufactured by Tokyo Chemical Industry Co., Ltd. Nn-butyldiethanolamine (tertiary amine): Manufactured by Nippon Emulsifier Co., Ltd. Triethanolamine (tertiary amine): Manufactured by Tokyo Chemical Industry Co., Ltd. (Quaternary ammonium salt) TEAH: Manufactured by Tokyo Chemical Industry Co., Ltd. (Hydrophobic nitrogen-containing organic compound) Dimethylstearylamine: Manufactured by Fujifilm Wako Pure Chemical Corporation n-Dodecylamine: Manufactured by Fujifilm Wako Pure Chemical Corporation Di-n-butylamine: Manufactured by Fujifilm Wako Pure Chemical Corporation 1,2,3-Benzotriazole: Manufactured by Tokyo Chemical Industry Co., Ltd. (Hydrophobic solvent) Propylene glycol monobutyl ether: Manufactured by Nippon Emulsifier Co., Ltd. Dipropylene glycol dimethyl ether: Manufactured by Nippon Emulsifier Co., Ltd. Dipropylene glycol monobutyl ether: Manufactured by Nippon Emulsifier Co., Ltd. Benzyl alcohol: Manufactured by Tokyo Ohka Kogyo Co., Ltd. (water) distilled water

[0068] <Addition process> Next, the raw materials other than the distilled water (water) were added to the distilled water (water) in the compositions shown in Tables 1 to 4. In the "Composition [mass %]" column of Tables 1 to 4, components indicated by "-" mean that they were not included in the sample.

[0069] [Table 1]

[0070] [Table 2]

[0071] [Table 3]

[0072] [Table 4]

[0073] By performing the above steps, cleaning agent compositions relating to samples 1 to 31, 33 to 54, 101 to 106, 110, and 111, having the configurations shown in Tables 1 to 4, were prepared.

[0074] ≪Characterization of Detergent Compositions≫ For each sample of the cleaning agent composition, the pH was measured and its appearance, cleaning performance, metal influence, and handling were evaluated.

[0075] <ph> The pH of the detergent composition for each sample was determined using the method described in Embodiment 1 above. The results obtained are recorded in the "pH (when diluted 100 times with water)" column of Tables 1 to 4.

[0076] <Exterior> The appearance of the cleaning agent composition for each sample was determined by the method described in Embodiment 1 above. The appearance of the cleaning agent composition for each sample was evaluated both immediately after sample preparation and one week later. The results obtained are recorded in the "Appearance" column of Tables 1 to 4.

[0077] <Cleaning properties> The cleaning performance of each detergent composition for each sample was evaluated using the following procedure.

[0078] (Preparing the test pieces) Test pieces for evaluating cleanability were prepared using the following procedure. First, a 20mm x 40mm copper plate (manufactured by Standard Test Piece Co., Ltd.) was prepared. "MB-T100" (manufactured by Senju Metal Industry Co., Ltd.) was printed onto the copper plate as an evaluation paste. Then, the copper plate was reflowed by leaving it on a hot plate at 250°C for 3 minutes. Test pieces were prepared using the above procedure.

[0079] (Evaluation test of cleaning performance) The cleaning performance of each sample was evaluated using the following procedure. First, 400 ml of the cleaning agent composition was added to a 500 ml beaker and heated to 50°C. Next, the heated cleaning agent composition was stirred at 500 rpm to disperse the aqueous phase and the organic phase. While maintaining the above-mentioned dispersed state, the test piece was immersed in the cleaning agent composition. After a predetermined time had elapsed since immersion in the cleaning agent composition, the test piece was removed, washed with water, and dried. The surface was then observed using a stereomicroscope (40x magnification) to measure the time required for complete removal of flux residue, and the cleaning performance was evaluated according to the following criteria. A cleaning performance rating of A or B indicates high cleaning performance of the cleaning agent composition. The results obtained are recorded in the "Cleaning Performance" column of Tables 1 to 4. However, areas with burnt flux residue were excluded from this evaluation. (Evaluation criteria) A: The washing time is less than 10 minutes. B: The washing time is 10 minutes or more but less than 15 minutes. C: The washing time is 15 minutes or more but less than 20 minutes. D: The washing time is between 20 and 25 minutes. E: The washing time is 25 minutes or longer.

[0080] The detergent compositions of Samples 1 to 31 and Samples 33 to 54 correspond to the Examples. On the other hand, the detergent compositions of Samples 101 to 106, Sample 110, and Sample 111 correspond to the Comparative Examples. It was confirmed that the detergent compositions of Samples 1 to 31 and Samples 33 to 54 (Examples) have superior cleaning properties compared to Samples 101 to 104 and Sample 110 (Comparative Examples).

[0081] <Metal effects> The metal effect was evaluated for each sample's cleaning agent composition using the following procedure. (Effects on iron (Fe)) Cold-rolled steel sheets (SPCC, JIS G 3141:2017) were degreased by immersion in acetone for 20 minutes. After degreasing, the SPCC was immersed in the cleaning agent composition corresponding to each sample at 50°C for 30 minutes. After rinsing the SPCC with water, the change in appearance of the SPCC was visually confirmed, and the effect on iron (Fe) was evaluated according to the following "Criteria for Evaluation of Metal Effects". (Effects on zinc (Zn)) Pure zinc plates were immersed in the cleaning agent composition for each sample at 50°C for 30 minutes. After rinsing with water, changes in appearance were observed using a stereomicroscope (magnification: 40x), and the effect on zinc (Zn) was evaluated according to the following "Criteria for Evaluation of Metal Effects". (Criteria for evaluating the effects of metals) A: No change was observed after 60 minutes or more. B: Changes are observed between 45 minutes and 60 minutes. C: Changes are observed between 30 minutes and 45 minutes. D: Changes are observed between 15 minutes and less than 30 minutes. E: Changes are observed in less than 15 minutes.

[0082] The cleaning agent compositions (Examples) for Samples 1 to 31 and Samples 33 to 54 were found to have reduced metal influence compared to Sample 101, Samples 104 to 106, and Sample 111 (Comparative Example).

[0083] <Handling> A uniform appearance of a detergent composition indicates excellent "handlingability." Here, excellent "handlingability" specifically means that no additional work, such as stirring, is required due to separation. The detergent compositions of Samples 1 to 31 and Samples 33 to 54 (Examples) had a uniform appearance, while the detergent composition of Sample 102 (Comparative Example) did not have a uniform appearance (in other words, separation occurred). Therefore, the detergent compositions of Samples 1 to 31 and Samples 33 to 54 (Examples) were found to have superior "handlingability" compared to the detergent composition of Sample 102 (Comparative Example).

[0084] <Reduction of VOCs> In a detergent composition, a water content of 20% by mass or more means that the water content is high, and means that volatile organic compounds (VOCs) are reduced. In the detergent compositions (Examples) according to Sample 1 to Sample 31 and Sample 33 to Sample 54, since the water content is 20% by mass or more, it was found that VOCs are reduced.

[0085] From the above, it was found that the detergent compositions (Examples) according to Sample 1 to Sample 31 and Sample 33 to Sample 54 are excellent in flux detergency and handleability, and have reduced metal influence and volatile organic compounds (VOCs).

[0086] Although the embodiments and examples of the present invention have been described above, it is also originally planned to appropriately combine the configurations of the respective embodiments and examples described above.

[0087] The embodiments and examples disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above-described embodiments and examples, and is intended to include all modifications within the meaning and scope equivalent to the claims.< / ph> < / ph>

Claims

1. A detergent composition comprising a hydrophilic glycol ether compound, an organic acid, a first compound, and water, The first compound is a hydrophilic nitrogen-containing organic compound and / or a hydrophilic quaternary ammonium salt. The water content is 40% by mass or more. The molar ratio of the first compound to the organic acid is 1 or more and 35 or less. The aforementioned organic acid is a hydrophilic acid and / or a hydrophobic acid. The hydrophilic acid is at least one hydrophilic acid selected from the group consisting of nitrilotris (methylenephosphonic acid), tartaric acid, citric acid, malic acid, glycolic acid, propionic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, 1-hydroxyethane-1,1-diphosphonic acid, glycine, phytic acid, 1H-benzotriazole-4-carboxylic acid, 1H-benzotriazole-5-carboxylic acid, and p-toluenesulfonic acid. The hydrophobic acid is at least one hydrophobic acid selected from the group consisting of diethylenetriaminepentaacetic acid, bicine, ethylenediaminetetra(methylenephosphonic acid), octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, lauric acid, alendronic acid, and 1-amino-2-naphthol-4-sulfonic acid. The content of the aforementioned organic acid is 0.1% by mass or more and 4.0% by mass or less. A cleaning agent composition for flux cleaning, wherein the content of the first compound is 1% by mass or more and 20% by mass or less.

2. The detergent composition according to claim 1, wherein the pH of the detergent composition is 8.0 or more and 12.0 or less.

3. The detergent composition according to claim 1 or claim 2, wherein the detergent composition is uniform in appearance under conditions of 25°C and 50°C.

4. The cleaning agent composition according to claim 1 or claim 2, wherein the organic acid is an organic acid having one or more carboxyl groups in one molecule, or an organic acid having one or more phosphonic acid groups in one molecule.

5. The cleaning agent composition according to claim 1 or claim 2, wherein the hydrophilic glycol ether compound is a compound represented by formula (1) and having a water solubility of more than 50% by mass at an environment of 20°C, or a compound represented by formula (2) and having a water solubility of more than 50% by mass at an environment of 20°C. 【Chemistry 1】 (In formula (1), R １ , R ２ and R ３ each independently represent a hydrogen atom, a methyl group, or an ethyl group, R ４ represents a linear and / or cyclic hydrocarbon group having 1 to 11 carbon atoms, -CH contained in the aforementioned hydrocarbon group ２ - may be replaced with -O-, and in formula (2), R ５ and R ６ each independently represent a hydrogen atom or a methoxy group, any one of the aforementioned R ５ and the aforementioned R ６ is a methoxy group, and R ７ represents a hydrogen atom or a methyl group.)

6. The cleaning agent composition according to claim 5, wherein the hydrophilic glycol ether compound is at least one compound selected from the group consisting of ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, ethylene glycol monoallyl ether, propylene glycol monopropyl ether, ethylene glycol monoisobutyl ether, ethylene glycol mono-tert-butyl ether, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, tripropylene glycol monomethyl ether, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, diethylene glycol monoisobutyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monobenzyl ether, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, diethylene glycol diethyl ether, diethylene glycol isopropyl methyl ether, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, triethylene glycol dimethyl ether, diethylene glycol monohexyl ether, ethylene glycol monoisopropyl ether, 2-methoxybutanol, 3-methoxybutanol, 3-methoxy-3-methylbutanol, and propyl cellosolve.

7. The hydrophilic nitrogen-containing organic compound is a compound represented by formula (3) and having a water solubility of more than 50% by mass at an environment of 20°C, or a compound represented by formula (4) and having a water solubility of more than 50% by mass at an environment of 20°C. The cleaning agent composition according to claim 1 or claim 2, wherein the hydrophilic quaternary ammonium salt is a compound represented by formula (5) and has a water solubility of more than 50% by mass at an environment of 20°C. 【Chemistry 2】 (In formula (3), R ８ is, -CH ２ CH ２ OH group, -CH ２ CH(OH)CH ３ group, -CH ２ CH ２ CH ２ NH ２ R represents a group, or a chain-like hydrocarbon group having 1 to 4 carbon atoms. ９ This is a hydrogen atom, -CH ２ CH ２ OH group, -CH ２ CH ２ CH ２ NH ２ base, or -CH ２ CH(OH)CH ３ The base is indicated by R １０ This is a hydrogen atom, -CH ２ CH ２ An OH group or a methyl group is represented, and in formula (4), R １５ , R １６ , R １７ Each of these independently represents a hydrogen atom or a methyl group, and in formula (5), R １１ , R １２ , R １３ , R １４ These each independently represent a hydrocarbon group having 1 to 2 carbon atoms.

8. The hydrophilic nitrogen-containing organic compound is at least one hydrophilic nitrogen-containing organic compound selected from the group consisting of monoisopropanolamine, 3,3'-diamino-N-methyldipropylamine, 3,3'-diaminodipropylamine, N-ethylethanolamine, diisopropanolamine, diethanolamine, N-n-butyldiethanolamine, triethanolamine, methyldiethanolamine, and 2-methylimidazole. The cleaning agent composition according to claim 7, wherein the hydrophilic quaternary ammonium salt is tetraethylammonium hydroxide.

9. A stock solution for a detergent composition according to claim 1 or claim 2, The content of the hydrophilic glycol ether compound is 40% by mass or more and 98.8% by mass or less. The content of the aforementioned organic acid is 0.1% by mass or more and 20% by mass or less. The content of the first compound is 1.1% by mass or more and 40% by mass or less. A stock solution for detergent compositions, to be used after diluting with water at a ratio of 1.1 to 20 times.

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