Cleaning agent composition and slurry cleaning method

Abstract

Provided is a cleaning agent having water as a main component, the cleaning agent having high cleaning power on a slurry adhering to a screen printing plate, suppressing the influence on an emulsion in the screen printing plate, and exhibiting a uniform appearance. The present invention is a cleaning agent composition containing: 0.5-10% by mass of a component (A); 1-10 mass% of a component (B); 1-10% by mass of a component (C); 0.1-5% by mass of a component (D); and 65.0 to 97.4 mass% of water. Component (A): a compound component having an alicyclic hydrocarbon group or an aromatic hydrocarbon group and having a molecular weight of 90-180 (inclusive) (B): a compound component represented by formula (1) (C): a compound component represented by formula (2) (D): a surfactant having an aromatic group # imgabs0 # N = a + b + c + d + e + f (C2H4O group), the total N being a number of 20-100 (inclusive). Formula (2): R1-O-(C2H4O) n-H (wherein R1 represents a branched alkyl group having 6-18 carbon atoms, and the average number of moles of C2H4O groups added is a number of 2-12 (inclusive). )

Description

Technical Field

[0001] The invention relates to a cleaning agent composition and a slurry cleaning method. Background Art

[0002] In recent years, as electronic devices have become smaller and lighter, thinner or more microscopic electronic circuits or electronic substrates have been developed. As a technology to meet such thinning and microscopic requirements, printed electronics technology has been put into practical use in recent years. In this technology, screen printing is widely used, and a mixture of conductive particles and resin, i.e., slurry, is printed on the surface of a substrate using a screen printing plate to form an electronic circuit.

[0003] In the cleaning of devices or screen printing plates using these slurries, freon-based or chlorine-based organic solvents have been mainly used in the past. However, from the perspective of improving the natural environment or the working environment, it is increasingly required to reduce VOC (Volatile Organic Compounds), and semi-aqueous cleaning agents or aqueous cleaning agents using non-freon hydrocarbon-based or glycol-based organic solvents tend to be preferred.

[0004] For example, Patent Document 1 describes a screen printing plate cleaning composition containing a glycol ether-based organic solvent and water.

[0005] Furthermore, for example, Patent Document 2 describes a cleaning agent composition for metal nano ink, which contains hydrogen peroxide, acid, water, and other organic solvents.

[0006] For example, Patent Document 3 describes a screen printing plate cleaning composition containing an amine, a glycol ether-based organic solvent, and water.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2000-267293

[0010] Patent Document 2: Japanese Patent Application Publication No. 2017-165830

[0011] Patent Document 3: Japanese Patent Application Publication No. 2021-50254 Summary of the invention

[0012] Problem that the invention aims to solve

[0013] The slurry cleaning agent is used to remove the slurry, but when cleaning, there is a concern that the emulsion used in forming the screen printing plate pattern will dissolve or swell. Especially in the case of semi-aqueous cleaning agents or aqueous cleaning agents, the emulsion is more likely to dissolve or swell than organic solvents. On the other hand, in order to be able to cope with miniaturized circuit wiring, high cleaning power is also required. For example, although the cleaning agent composition described in Patent Document 1 can inhibit the dissolution or swelling of the emulsion, only the solubility of the ink is confirmed regarding the cleaning power, and it is possible that the cleaning power for cleaning the miniaturized circuit wiring is insufficient. Furthermore, although the cleaning agent composition described in Patent Document 2 has a high cleaning power for copper nano ink, there is a concern about the dissolution of the emulsion because it contains strong acids such as sulfuric acid or hydrochloric acid and hydrogen peroxide with an oxidizing effect.

[0014] In addition, from the viewpoint of ease of handling or storage stability, the cleaning agent is preferably a uniform solution. However, organic solvents with high hydrophobicity have low solubility in water, so there is a problem of phase separation. The cleaning agent composition described in Patent Document 3 is prepared by combining a hydrophilic glycol ether and a hydrophobic glycol ether to prepare an aqueous cleaning agent, but it is described that two-layer separation occurs, and there is a concern that storage stability is poor.

[0015] As described above, there is no slurry cleaning agent that has a uniform appearance and can achieve both cleaning power and suppress the effect on the emulsion.

[0016] The present invention is completed in view of the above situation, and its purpose is to provide a cleaning agent that has high cleaning power for slurry attached to the device or screen printing plate, while suppressing the impact on the emulsion in the screen printing plate and presenting a uniform appearance, with water as the main component.

[0017] Solutions to the problem

[0018] A cleaning composition in one embodiment of the present invention for solving the above-mentioned problems is a cleaning composition comprising the following components: 0.5% by mass or more and 10% by mass or less of component (A); 1% by mass or more and 10% by mass or less of component (B); 1% by mass or more and 10% by mass or less of component (C); 0.1% by mass or more and 5% by mass or less of component (D); and 65.0% by mass or more and 97.4% by mass or less of water,

[0019] in,

[0020] Component (A) is a compound having an alicyclic hydrocarbon group or an aromatic hydrocarbon group and having a molecular weight of 90 or more and 180 or less,

[0021] Component (B) is a compound represented by formula (1),

[0022] Component (C) is a compound represented by formula (2),

[0023] Component (D) is a surfactant having an aromatic group.

[0024] [Chemistry 1]

[0025]

[0026] N=a+b+c+d+e+f

[0027] (In formula (1), the total N of the average number of added moles of C2H4O groups is a number of 20 or more and 100 or less.)

[0028] R 1 -O-(C2H4O) n -H…Formula (2)

[0029] (In formula (2), R 1 represents a branched alkyl group having 6 to 18 carbon atoms, wherein the average number of moles of C2H4O groups added is n, which is 2 to 12.

[0030] A method for cleaning slurry in one embodiment of the present invention for solving the above-mentioned problems includes the steps of: preparing a screen printing plate having slurry attached to its surface; and bringing the cleaning composition into contact with the surface of the screen printing plate having the slurry attached thereto.

[0031] Effects of the Invention

[0032] The slurry cleaning agent of the present invention is a cleaning agent which has sufficient cleaning power for removing slurry, suppresses the influence on the emulsion in the screen printing plate, and presents a uniform appearance, and contains water as a main component. DETAILED DESCRIPTION

[0033] Next, embodiments of the present invention will be described.

[0034] A cleaning agent composition according to one embodiment of the present invention (hereinafter also referred to as "cleaning agent") contains the following components: 0.5% by mass to 10% by mass of component (A); 1% by mass to 10% by mass of component (B); 1% by mass to 10% by mass of component (C); 0.1% by mass to 5% by mass of component (D); and 65.0% by mass to 97.4% by mass of water.

[0035] Component (A): A compound having an alicyclic hydrocarbon group or an aromatic hydrocarbon group and having a molecular weight of 90 or more and 180 or less

[0036] Component (B): a compound represented by formula (1)

[0037] Component (C): a compound represented by formula (2)

[0038] Component (D): Surfactant having an aromatic group

[0039] [Chemistry 2]

[0040]

[0041] N=a+b+c+d+e+f

[0042] (In formula (1), the total N of the average number of added moles of C2H4O groups is a number of 20 or more and 100 or less.)

[0043] R 1 -O-(C2H4O) n -H…Formula (2)

[0044] (In formula (2), R 1 represents a branched alkyl group having 6 to 18 carbon atoms, wherein the average number of moles of C2H4O groups added is n, which is 2 to 12.

[0045] Hereinafter, each component contained in a cleaning agent will be described.

[0046] [Ingredients (A)]

[0047] Component (A) is a compound having an alicyclic hydrocarbon group or a compound having an aromatic hydrocarbon group, and has a molecular weight of 90 to 180. The cleaning agent may contain only one kind of component (A) or a plurality of kinds of components.

[0048] Component (A) has high slurry removal performance, and when combined with components (B) to (D), its compatibility with water, which is the main component of the cleaning agent, is sufficiently improved. Therefore, component (A) can improve the slurry removal performance while making it difficult for the cleaning agent to become cloudy or phase separated, and can maintain a uniform appearance of the cleaning agent even when stored for a long time (improving storage stability).

[0049] The number of atoms of the alicyclic hydrocarbon group contained in the constituent component (A) is not particularly limited, but the alicyclic hydrocarbon group preferably has a six-membered ring, and more preferably has a six-membered ring having 6 carbon atoms. In addition, the number of atoms of the aromatic hydrocarbon group contained in the constituent component (A) is not particularly limited, but the aromatic hydrocarbon group preferably has a six-membered ring, and more preferably has a six-membered ring having 6 carbon atoms.

[0050] The total number of carbon atoms of the component (A) is preferably 6 or more and 12 or less. The compatibility with the slurry is improved, and the removal of the slurry becomes easy.

[0051] The number of substituents possessed by component (A) is 1 to 2, and contains an alkyl group having 1 to 6 carbon atoms, an alkyl group having 1 to 6 carbon atoms and having a hydroxyl group, an ester group having 1 to 4 carbon atoms, or an ether group having 1 to 6 carbon atoms. When the number of substituents is 2, the substituents may be the same or may contain a plurality of substituents. Among these, it is preferred to contain an ester group having 1 to 4 carbon atoms or an ether group having 1 to 6 carbon atoms, and it is preferred to contain the above-mentioned ester group or ether group and not contain a hydroxyl group.

[0052] Specific examples of component (A) include toluene, ethylbenzene, propylbenzene, butylbenzene, pentylbenzene, xylene, methyl benzoate, ethyl benzoate, propyl benzoate, phenoxyethanol, ethyl phenyl ether, butyl phenyl ether, 2-phenylethanol, 3-phenyl-1-propanol, terpineol, dihydroterpineol, limonene, methylcyclohexane, and the like.

[0053] Particularly preferred are ethyl benzoate, phenoxyethanol, ethyl phenyl ether, terpineol, and methylcyclohexane, and more preferred are ethyl benzoate and ethyl phenyl ether.

[0054] Relative to the total mass of the cleaning agent, the content of component (A) is 0.5% by mass or more and 10% by mass or less, preferably 1% by mass or more and 8% by mass or less, more preferably 2% by mass or more and 6% by mass or less. When the above-mentioned content of component (A) is 0.5% by mass or more, the contact frequency of component (A) with the slurry is increased and it becomes easy to remove the slurry. When the above-mentioned content of component (A) is 10% by mass or less, component (A) becomes easy to dissolve and storage stability is improved.

[0055] [Ingredient (B)]

[0056] Component (B) is a compound represented by formula (1). The cleaning agent may contain only one kind of component (B) or a plurality of kinds of components (B).

[0057] [Chemistry 3]

[0058]

[0059] N=a+b+c+d+e+f

[0060] In formula (1), the total N of the average number of moles of C2H4O groups added is a number greater than 20 and less than 100. It should be noted that any one or more of a to f may also be 0. The triglyceride represented by formula (1) has a total N of an average number of moles of C2H4O groups added of 20 or more and less than 100, thereby improving the solubility of component (A) and improving storage stability. In addition, by making N a number greater than 20 and less than 100, it is possible to suppress penetration into the emulsion portion of the screen printing plate, and the plate change rate becomes smaller. N is preferably greater than 30 and less than 90, and more preferably greater than 50 and less than 70.

[0061] The HLB (Hydrophilic-Lipophilic Balance) value of the component (B) is preferably 12 to 17, more preferably 13 to 16. When the HLB value of the component (B) is 12 to 17, the solubility of the component (A) is improved, and the storage stability is improved.

[0062] Relative to the total mass of the cleaning agent, the content of component (B) is 1% by mass or more and 10% by mass or less, preferably 3% by mass or more and 8% by mass or less, and more preferably 4% by mass or more and 6% by mass or less. When the above content of component (B) is 1% by mass or more, the affinity of component (A) with water is improved, and the storage stability is improved. When the above content of component (B) is 10% by mass or less, the penetration into the emulsion part in the screen printing plate can be suppressed, and the plate change rate becomes small.

[0063] [Ingredient (C)]

[0064] Component (C) is a compound represented by formula (2) (polyalkylene glycol). The cleaning agent may contain only one kind of component (C) or a plurality of kinds of components (C).

[0065] R 1 -O-(C2H4O) n -H…Formula (2)

[0066] In formula (2), R 1 represents a branched alkyl group having 6 to 18 carbon atoms. In particular, R 1 It is preferably a branched alkyl group having 8 or more and 10 or less carbon atoms. 1 When the carbon number of the branched alkyl group is 6 to 18, the solubility of the component (A) is improved, and the storage stability is improved.

[0067] R 1 The branched chain contained in is preferably an alkyl group having 1 to 3 carbon atoms, and is preferably a methyl branched chain or an ethyl branched chain.

[0068] R 1Specific examples include isooctyl, 2-ethylhexyl, isononyl, 3,5,5-trimethylhexyl and isodecyl.

[0069] In formula (2), n is the average number of added moles of oxyethylene groups (C2H4O), and is a number of 2 to 12. Preferably, n is a number of 4 to 10.

[0070] The HLB (Hydrophilic-Lipophilic Balance) value of component (C) is not particularly limited, and can be, for example, 10 to 14, particularly preferably 11 to 13, and more preferably 13. When it is within the above range, the solubility of component (A) is improved, the storage stability is improved, and the penetration into the emulsion part of the screen printing plate can be suppressed, and the plate change rate is reduced.

[0071] Relative to the total mass of the cleaning agent, the content of component (C) is 1% by mass or more and 10% by mass or less, preferably 3% by mass or more and 8% by mass or less, and more preferably 4% by mass or more and 6% by mass or less. When the above content of component (C) is 1% by mass or more, the solubility of component (A) is improved, and the storage stability is improved. When the above content of component (C) is 10% by mass or less, the penetration into the emulsion part in the screen printing plate can be suppressed, and the plate change rate becomes small.

[0072] [Ingredient (D)]

[0073] Component (D) is a surfactant having an aromatic group, which is a compound having an ionic hydrophilic group and a long-chain alkyl hydrophobic group in one molecule. In the case of a cationic surfactant, as an ionic hydrophilic group, for example, a quaternary ammonium ion can be cited, and in the case of an anionic surfactant, for example, a sulfonic acid ion can be cited. It should be noted that the counter ion is not particularly limited. The chain length of the long-chain alkyl of the hydrophobic group is not particularly specified, and is preferably set to 8 to 18 or less carbon atoms of a commonly commercially available surfactant.

[0074] By using a surfactant having an aromatic group as the component (D), the solubility of the component (A) can be increased to improve the storage stability, and the penetration of the cleaning agent into the plate can be suppressed to reduce the plate change rate.

[0075] Specific examples of the cationic surfactant include benzyl hexadecyl dimethyl ammonium chloride, benzyl dimethyl stearyl ammonium chloride, coconut oil alkyl dimethyl benzyl ammonium chloride, benzyl hexadecyl dimethyl ammonium bromide, benzyl dimethyl stearyl ammonium bromide, and coconut oil alkyl ammonium bromide.

[0076] Specific examples of the anionic surfactant include linear sodium alkylbenzene sulfonate (LAS) and branched sodium alkylbenzene sulfonate (ABS).

[0077] In particular, coconut oil alkyl ammonium chloride and linear alkyl benzene sulfonate (LAS) are preferred. Component (D) may contain only one type or multiple types as long as the ionicity of the hydrophilic groups is the same.

[0078] The content of component (D) is 0.1% by mass or more and 5% by mass or less, preferably 0.5% by mass or more and 4% by mass or less, relative to the total mass of the cleaning agent. When the content of component (D) is 0.1% by mass or more, the solubility of component (A) is improved, and the storage stability is improved. When the content of component (D) is 5% by mass or less, the permeability to the plate is suppressed, and the plate change rate becomes small.

[0079] [water]

[0080] As water, ion exchange water, distilled water, RO water, tap water, industrial water, etc. can be used.

[0081] The content of the water is 65.0 mass % to 97.4 mass % based on the total mass of the cleaning agent, preferably 72 mass % to 92.5 mass %, and more preferably 78.0 mass % to 89.5 mass %.

[0082] The liquid property of the cleaning agent is preferably from weakly acidic to neutral. The liquid property from weakly acidic to neutral means pH = 5.0 to 8.0. As a method of adjusting the liquid property to weakly acidic or neutral, for example, a method of using a pH adjuster can be mentioned.

[0083] [Other ingredients]

[0084] In addition to the above-mentioned components, the cleaning agent may contain other components that are usually added to conventional slurry cleaning agents. Examples of the above-mentioned other components include preservatives, thickeners, colorants, and the like.

[0085] The composition of the present invention can be used directly as a stock solution or diluted with water as needed. The dilution ratio is appropriately determined according to the application or purpose, and is, for example, 2 to 50 times.

[0086] [Use of cleaning agent]

[0087] Cleaning agents are used to remove slurry that is temporarily attached to the surface of the screen printing plate.

[0088] It is believed that the cleaning agent is removed by penetrating into the interior of the slurry at the interface of the screen printing plate and the slurry. In order to more fully exert these effects, it is preferred that the cleaning agent fully penetrates into the interior of the slurry so that a sufficient amount of the cleaning agent reaches the interface of the screen printing plate and the slurry.

[0089] The temperature of the cleaning agent when the cleaning agent is brought into contact with the slurry is preferably set to about 25 to 70°C.

[0090] Slurry is a general term for materials made by dispersing solid particles in synthetic resins. Synthetic resins include thermoplastic resins such as acrylic resins or polyester resins, and thermosetting resins such as phenolic resins or epoxy resins. Solid particles include carbon black or metal particles (silver, copper, nickel, etc.) with a size of submicron to 100 microns, tin oxide, ceramics, etc. In particular, when used in the cleaning of slurries containing fillers, the cleaning agent of the present invention has a high cleaning power, suppresses the influence on emulsions, and has a significant effect on appearance uniformity.

[0091] Example

[0092] Hereinafter, the present invention will be described using Examples and Comparative Examples, but the present invention is not limited to the following Examples at all.

[0093] 1. Preparation of cleaning agent

[0094] 1-1. Materials

[0095] 1-1-1.Ingredients (A)

[0096] Compounds A1 to A5 and Compound A1' shown in Table 1 were prepared. Compounds A1 to A5 are compounds having an alicyclic hydrocarbon group or an aromatic hydrocarbon group and are compounds having a molecular weight of 90 to 180 (component (A)), and Compound A1' is a compound that is not component (A) due to a different chemical structure.

[0097] Table 1 shows the compound names, molecular weights, total carbon atoms, and substituent numbers of Compound A1 to Compound A5 and Compound A1′.

[0098] Table 1

[0099] Compound Compound Name Molecular weight Total carbon atoms Substitution base A1 Ethyl benzoate 150.17 9 1 A2 Phenoxyethanol 138.16 8 l A3 Ethyl phenyl ether 122.16 8 1 A4 Terpineol 154.25 10 2 A5 Methylcyclohexane 98.19 7 1 A1’ 1-Hexanol 102.17 6 1

[0100] 1-1-2. Component (B)

[0101] Compounds B1 and B2 and compound B1' were prepared as shown in Table 2. Compounds B1 and B2 are compounds represented by formula (1) (component (B)), and compound B1' is a compound that is not component (B) due to a different chemical structure.

[0102] [Chemistry 4]

[0103]

[0104] N=a+b+c+d+e+f

[0105] Table 2 shows the compound names and HLB values ​​of Compound B1 to Compound B2 and Compound B1′.

[0106] Table 2

[0107] Compound Compound Name HLB value B1 PEG-60 Hydrogenated Castor Oil 15 B2 PEG-40 Hydrogenated Castor Oil 13 B1’ Polysorbate 80 16

[0108] 1-1-3. Ingredient (C)

[0109] Compounds C1 and C2 and compound C1' were prepared as shown in Table 3. Compounds C1 and C2 are compounds represented by formula (2) (component (C)), and compound C1' is a compound having a structure represented by formula (2) but not component (C) due to a different chemical structure.

[0110] R 1 -O-(C2H4O) n -H…Formula (2)

[0111] Table 3 shows the R of compounds C1 to C2 and compound C1' in formula (2). 1 The functional group name, carbon atom number, linear or branched structure and the number of n and HLB value of oxyethylene (C2H4O).

[0112] Table 3

[0113]

[0114] 1-1-4. Ingredient (D)

[0115] Compounds D1 and D2 and compound D1' were prepared as shown in Table 4. Compounds D1 and D2 are surfactants (component (D)) having an aromatic group, and compound D1' is a compound that is not component (D) due to a different chemical structure.

[0116] Table 4 shows the compound names of Compound D1 to Compound D2 and Compound D1′, the number of carbon atoms in the alkyl group, the presence or absence of an aromatic group, and the type of active agent.

[0117] Table 4

[0118] Compound Compound Name The number of carbon atoms in the alkyl group Whether there is aromatic group type D1 Coconut Alkyl Dimethyl Benzyl Ammonium Chloride 8～18 have Cationic surfactants D2 Sodium linear alkylbenzene sulfonate 10～14 have Anionic surfactants D1’ Coconut oil alkyl trimethyl ammonium chloride 8～18 none Cationic surfactants

[0119] 1-2. Preparation of cleaning agent

[0120] The above-mentioned components and water were blended so that the total amount became 100 mass %, and the cleaning agent compositions of Examples 1 to 8 and Comparative Examples 1 to 8 were prepared.

[0121] 2. Evaluation of appearance

[0122] The appearances of the cleaning compositions of Examples 1 to 8 and Comparative Examples 1 to 8 were checked after being stored at 25° C. for 4 weeks.

[0123] Regarding the above test, each cleaning liquid was evaluated according to the following criteria.

[0124] <(1) Appearance evaluation>

[0125] ○: Transparent

[0126] ×: cloudy or separated into two layers

[0127] 3. Evaluation of cleaning agents

[0128] The cleaning agent compositions of Examples 1 to 8 and Comparative Examples 1 to 8 prepared above were evaluated according to the following criteria.

[0129] 3-1. Cleaning test

[0130] 3-1-1. Preparation of cleaning test pieces (cleaning evaluation)

[0131] The weight of a 30 mm x 10 mm metal mesh (100 mesh) was recorded in advance. Then, slurry ("DY-150H-30", manufactured by Toyobo Co., Ltd., binder: thermosetting resin, filler: carbon black) was applied to the lower half 10 mm, and the excess slurry was removed to prepare a test piece. The weight of the test piece coated with slurry was re-measured, and the amount of slurry applied was recorded.

[0132] 3-1-2. Cleaning test

[0133] Add 10 g of the cleaning agent prepared above to a 20 mL screw-capped tube and keep it warm at 60°C. Immerse all the test pieces prepared above in the cleaning agent kept warm at 60°C, and irradiate ultrasonic waves for 10 minutes using an ultrasonic cleaning machine ("BRANSON B-220", manufactured by Emerson Electric Co.) while keeping it warm at 60°C. Then, rinse the test piece with ion exchange water, dry it thoroughly, and measure the weight of the test piece. The cleaning rate is calculated based on the weight change before and after the test piece is cleaned. The calculation method of the cleaning rate is as follows. It should be noted that this test was carried out twice, and the average value was taken as the measurement result of this test.

[0134]

[0135] Based on the cleaning rate measured above, each cleaning liquid was evaluated according to the following criteria.

[0136] <(2) Cleaning evaluation>

[0137] ◎: The cleaning rate is 95% or more.

[0138] ○: The cleaning rate is 80% or more and less than 95%.

[0139] ×: The cleaning rate is less than 80%.

[0140] 3-2. Impact on the version

[0141] 3-1-1. Preparation of test pieces

[0142] A screen printing plate ("ST325", manufactured by Tokyo Process Service Co., Ltd.) cut into 30 mm x 10 mm was used as a test piece, and the weight of the test piece was measured and recorded.

[0143] 3-1-2. Version change rate

[0144] Add 10 g of the cleaning agent prepared above to a 20 mL screw-capped tube and keep it warm at 60°C. Immerse all the test pieces prepared above in the cleaning agent kept warm at 60°C, and irradiate ultrasonic waves for 10 minutes using an ultrasonic cleaning machine ("BRANSON B-220", manufactured by Emerson Electric Company) while keeping it warm at 60°C. Then, rinse the test piece with ion exchange water, dry it thoroughly, and measure the weight of the test piece. The rate of change is calculated based on the change in weight of the test piece before and after the test. The method for calculating the rate of change is as follows. It should be noted that this test was carried out twice, and the average value was taken as the measurement result of this test.

[0145]

[0146] Based on the above measured change rate, each cleaning solution was evaluated according to the following criteria.

[0147] <(3) Version change rate>

[0148] ◎: The rate of change is within ±0.5%.

[0149] ○: The rate of change is greater than ±0.5% and less than ±1.0%.

[0150] ×: The rate of change is greater than ±1.0%.

[0151] The contents of the above-mentioned components contained in the cleaning compositions of Examples 1 to 8 and Comparative Examples 1 to 8 and the results of the above-mentioned evaluations on the cleaning solutions are shown in Tables 5 and 6. In addition, the numerical values ​​of the components in Tables 5 and 6 represent the ratios (in mass %) relative to the total mass of the cleaning agents.

[0152] Table 5

[0153]

[0154] Table 6

[0155]

[0156] As shown in Tables 5 and 6, the cleaning agent containing component (A), component (B), component (C), component (D) and water is a cleaning agent that has sufficient cleaning power for removing slurry, suppresses the influence on the emulsion in the screen printing plate, presents a uniform appearance, and contains water as the main component.

[0157] This application claims the priority based on Japanese application No. 2022-163189 for which it applied on October 11, 2022, and the contents described in the specification and claims of this application are cited in this application.

[0158] Industrial Applicability

[0159] According to the present invention, a cleaning agent composition that can be used for slurry attached to an apparatus or a screen printing plate has sufficient cleaning power for removing the slurry, thereby contributing to improved productivity, and since the influence on the emulsion in the screen printing plate is suppressed, the screen printing plate becomes reusable, thereby contributing to reducing waste.

Claims

1. A cleaning composition comprising the following ingredients: 0.5 mass % or more and 10 mass % or less of component (A); 1% by mass or more and 10% by mass or less of component (B); 1% by mass or more and 10% by mass or less of component (C); 0.1% by mass or more and 5% by mass or less of component (D); and 65.0 mass % or more and 97.4 mass % or less of water, in, Component (A) is a compound having an alicyclic hydrocarbon group or an aromatic hydrocarbon group and having a molecular weight of 90 or more and 180 or less, Component (B) is a compound represented by formula (1), Component (C) is a compound represented by formula (2), Component (D) is a surfactant having an aromatic group, [Chemistry 1] N=a+b+c+d+e+t In formula (1), the total number N of the average number of moles of added C2H4O groups is 20 or more and 100 or less, R 1 -O-(C2H4O) n -H…Formula (2) In formula (2), R 1 It represents a branched alkyl group having 6 to 18 carbon atoms, wherein the average added molar number n of C2H4O groups is 2 to 12.

2. A slurry cleaning method comprising the following steps: The process of preparing a screen printing plate with slurry attached to the surface; and A step of bringing the cleaning composition according to claim 1 into contact with the surface of the screen printing plate to which the slurry is attached.

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