Equipment cleaning agent containing methyl butyl tertiary ether before coating and preparation method thereof

Abstract

The invention belongs to the technical field of cleaning agents, and particularly relates to a methyl butyl tertiary ether-containing equipment cleaning agent before film coating and a preparation method of the methyl butyl tertiary ether-containing equipment cleaning agent. The equipment cleaning agent containing methyl butyl tertiary ether before coating comprises the following raw materials in percentage by mass: 20-30% of a surfactant, 8-15% of methyl butyl tertiary ether, 2-5% of ionic liquid, 2-5% of humic acid modified konjac glucomannan and the balance of water, the surfactant is prepared from fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether and an epoxypropane-ethylene oxide-vinyl diamine copolymer according to the mass ratio of (5 to 15) to (5 to 10) to (2 to 6). The equipment cleaning agent before coating has good high-temperature stability, low-temperature stability, cleaning power and PVD (Physical Vapor Deposition) coating product yield, and has no corrosion effect on aluminum and stainless steel.

Description

Technical Field

[0001] The present invention belongs to the technical field of cleaning agents, and particularly relates to a pre-coating equipment cleaning agent containing methyl butyl ether and a preparation method thereof. Background Art

[0002] In order to meet the requirements of improving the corrosion resistance, wear resistance, aesthetics and functionality of the surface of electronic devices, coating treatment is an essential part of electronic devices. One of the common coating methods is physical vapor deposition. One of the key factors affecting the quality and performance of physical vapor deposition coating is the cleanliness of the surface of electronic devices. Therefore, cleaning before coating is one of the necessary steps.

[0003] The shell materials used for electronic devices mainly include metals, plastics, glasses, ceramics and composite materials, etc. Among them, stainless steel / aluminum composite materials combine the high strength and corrosion resistance of stainless steel with the light weight and thermal conductivity of aluminum. Therefore, they have broad application prospects in the field of electronic device shells.

[0004] At present, chemical cleaning agents are usually used in the pre-treatment cleaning process before metal coating. For example, in the Chinese patent with the publication number CN119392250A, 3% and 1% sodium hydroxide solutions, 8% hydrochloric acid solution and 8% hydrofluoric acid solution are used to pre-treat the stainless steel surface before coating. However, aluminum is prone to corrosion in strong acid and strong alkali environments. When used for coating the shells of electronic devices made of stainless steel / aluminum composite materials, it will damage the integrity of the shell surface and affect the coating quality.

[0005] The Chinese patent with the publication number CN 117431545 A in the prior art discloses an aqueous cleaning agent composition for use before PVD of stainless steel / aluminum composite materials and a cleaning process based on it. This technical solution includes a degreasing agent A, a neutralizing agent B and a rinsing agent C; the degreasing agent A contains the following components in mass percentages: 6-10% of C10-16 fatty alcohol polyoxyethylene polyoxypropylene ether, 4-8% of sodium cocoyl hydroxyethyl sulfonate, 4-7% of 2-hydroxyphosphonoacetic acid, 3-5% of tetrasodium glutamate diacetate, 1-3% of sodium hydroxide, and the balance is water. The three components of this aqueous cleaning agent composition are reasonably matched, suitable for pre-cleaning of most metals before PVD, especially suitable for pre-cleaning of stainless steel / aluminum composite materials before PVD, which can not only meet the cleaning requirements before PVD coating of stainless steel / aluminum composite materials, but also will not cause corrosion to the substrate. However, this technical solution must be completed step by step during use, resulting in a complex cleaning process and cumbersome procedures. Summary of the Invention

[0006] In view of the above problems, the present invention provides a pre-coating equipment cleaning agent containing methyl butyl ether and a preparation method thereof.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] In the first aspect of the present invention, a cleaning agent for equipment before coating containing methyl tert-butyl ether is provided. By mass percentage, the raw materials include 20-30% of surfactant, 8-15% of methyl tert-butyl ether, 2-5% of ionic liquid, 2-5% of humic acid-modified konjac glucomannan, and water to make up the balance to 100%;

[0009] The surfactant includes fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether, and propylene oxide-ethylene oxide-vinyl diamine copolymer with a mass ratio of 5-15:5-10:2-6.

[0010] Preferably, the surfactant includes fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether, and propylene oxide-ethylene oxide-vinyl diamine copolymer with a mass ratio of 10:7:5.

[0011] Further preferably, the fatty alcohol ether phosphate is fatty alcohol ether phosphate MOA-9P, purchased from Haian Guoli Chemical Co., Ltd.

[0012] Further preferably, the average molecular weight of the polyoxyethylene polyoxypropylene block polyether is 2000, purchased from Liaoning Kelong Fine Chemical Co., Ltd., model: L61.

[0013] Further preferably, the propylene oxide-ethylene oxide-vinyl diamine copolymer is purchased from Beijing Baierdi Biotechnology Co., Ltd., product number: CM0996.

[0014] Through the above technical solution of the present invention, that is, using fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether, and propylene oxide-ethylene oxide-vinyl diamine copolymer with a mass ratio of 5-15:5-10:2-6 as the surfactant and methyl tert-butyl ether acting together to clean the stainless steel / aluminum composite material, it has excellent oil cleaning performance and at the same time makes the cleaning agent for equipment before coating have excellent low-temperature stability and high-temperature stability. It is speculated that because the branched-chain structure of methyl tert-butyl ether quickly enters the interior of the oil stain, decomposes it, is beneficial to the emulsification of the surfactant, and prevents its redeposition; on the other hand, the polyoxyethylene polyoxypropylene block polyether forms a helical hydrophobic structure at low temperature to embed the alkyl chain of the fatty alcohol ether phosphate therein, preventing crystallization and precipitation, so it has excellent low-temperature stability; at the same time, at high temperature, the ethylene oxide block of the propylene oxide-ethylene oxide-vinyl diamine copolymer forms a three-dimensional network structure through hydrogen bond reconstruction, so it has excellent high-temperature stability.

[0015] Preferably, the ionic liquid comprises 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, and 1-methyl acetate-3-methylimidazolium tetrafluoroborate in a mass ratio of 5-8:1-3:1.

[0016] More preferably, the ionic liquid comprises 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, and 1-methyl acetate-3-methylimidazolium tetrafluoroborate in a mass ratio of 6:2:1.

[0017] The present inventors have found that although when using a specific surfactant to clean the stainless steel / aluminum composite material, it has an excellent effect of removing oil stains, but when performing PVD coating on the stainless steel / aluminum composite material,

[0018] its yield is relatively low. It is speculated that because the above surfactant cannot remove the residual oxide layer of the stainless steel / aluminum composite material, and the oxide layer of the stainless steel / aluminum composite material is more complex than that of a single metal material. It is a difficult problem to ensure the effective removal of the oxide layer while avoiding the corrosion of the stainless steel / aluminum composite material. The present inventors have unexpectedly found through a large number of creative experiments that when the above technical solution is adopted, that is, the ionic liquid comprises 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, and 1-methyl acetate-3-methylimidazolium tetrafluoroborate in a mass ratio of 5-8:1-3:1, in combination with the surfactant, the yield of the PVD coating product is improved. It is speculated that on the one hand, 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, and 1-methyl acetate-3-methylimidazolium tetrafluoroborate dissolve aluminum oxide and stainless steel oxide, avoiding the influence of the oxide layer on the PVD coating, and on the other hand, 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, and 1-methyl acetate-3-methylimidazolium tetrafluoroborate act together with the surfactant to further improve its cleaning effect on oil stains and other impurities.

[0019] However, the inventor found that the corrosion rate of aluminum in the above technical solution is relatively high. To further solve this technical problem, the present invention creatively prepared humic acid-modified konjac glucomannan, which not only avoids the corrosion of aluminum by the equipment cleaning agent before coating, but also further improves the yield rate of PVD coating products. It is speculated that because humic acid is grafted onto the konjac glucomannan chain, its water solubility and surface activity are increased, making it easier to adsorb on the surface of stainless steel / aluminum composite materials, preventing the corrosion components from directly contacting the stainless steel / aluminum composite materials. At the same time, the chelating effect of humic acid can combine metal ions in the solution, reducing the corrosion of aluminum. In addition, in terms of PVD coating, humic acid-modified konjac glucomannan may form an extremely thin pretreatment layer on the surface after cleaning, improving the surface energy and promoting the uniform deposition of the coating, thereby increasing the yield rate.

[0020] Preferably, the preparation method of the humic acid-modified konjac glucomannan includes the following steps: mixing a konjac glucomannan solution, ascorbic acid and a humic acid solution, performing ultrasonic treatment, adding a hydrogen peroxide solution, performing ultrasonic treatment, and drying to obtain the product.

[0021] More preferably, the preparation method of the humic acid-modified konjac glucomannan includes the following steps: mixing a konjac glucomannan solution, ascorbic acid and a humic acid solution, performing ultrasonic treatment at 20 - 30 °C for 1 - 2 h, adding a hydrogen peroxide solution, performing ultrasonic treatment at 20 - 30 °C for 0.5 - 1 h, and drying to obtain the product.

[0022] Preferably, the konjac glucomannan solution is prepared from konjac glucomannan and water with a mass ratio of 1 - 3:100.

[0023] Preferably, the humic acid solution is prepared from humic acid and water with a mass ratio of 0.5 - 1:100.

[0024] Preferably, the mass concentration of the hydrogen peroxide solution is 3%.

[0025] Preferably, the mass ratio of the konjac glucomannan solution, ascorbic acid, humic acid solution and hydrogen peroxide solution is 8 - 12:0.1 - 0.3:1 - 2:0.2 - 0.5.

[0026] More preferably, the mass ratio of the konjac glucomannan solution, ascorbic acid, humic acid solution and hydrogen peroxide solution is 10:0.2:1.5:0.3.

[0027] It should be noted that the present invention does not make specific limitations on the drying conditions, as long as drying can be achieved.

[0028] The second aspect of the present invention provides a preparation method of the above-mentioned equipment cleaning agent before coating containing methyl tert-butyl ether, which includes the following steps: mixing evenly according to the formula.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. When the fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether and propylene oxide-ethylene oxide-vinyl diamine copolymer with a mass ratio of 5-15:5-10:2-6 are used as surfactants to act together with methyl butyl tert-ether to clean the stainless steel / aluminum composite material, it has excellent oil cleaning performance and also makes the equipment cleaning agent before coating have excellent low-temperature stability and high-temperature stability.

[0031] 2. The present invention uses 1-propylsulfonic acid-3-methylimidazole chloride, 1-carboxymethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide and 1-methyl acetate-3-methylimidazole tetrafluoroborate with a mass ratio of 5-8:1-3:1 as ionic liquids, which act together with the surfactant to improve the yield of PVD coating products.

[0032] 3. The present invention creatively prepares humic acid-modified konjac glucomannan, which not only avoids the corrosion of aluminum by the equipment cleaning agent before coating, but also further improves the yield of PVD coating products. Detailed Embodiments

[0033] In order to have a clearer understanding of the technical features, objectives and effects of the present invention, the specific implementation embodiments are described in detail below.

[0034] The present invention will be further described below in conjunction with the embodiments, but the present invention is not limited to the following embodiments. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions not specified are the conventional conditions in the industry. The technical features involved in each implementation mode of the present invention can be combined with each other as long as they do not conflict with each other.

[0035] In the following examples and comparative examples, unless otherwise specified, the raw materials used are all commercially available or prepared by conventional methods in the art.

[0036] Example 1

[0037] A cleaning agent for equipment before coating containing methyl butyl tert-ether, by mass percentage, the raw materials include 25% of surfactant, 10% of methyl butyl tert-ether, 4% of ionic liquid, 3% of humic acid-modified konjac glucomannan, and water is added to make up the balance to 100%.

[0038] The surfactant includes fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether and propylene oxide-ethylene oxide-vinyl diamine copolymer with a mass ratio of 10:7:5.

[0039] The fatty alcohol ether phosphate is fatty alcohol ether phosphate MOA-9P, purchased from Haining Guoli Chemical Co., Ltd.

[0040] The average molecular weight of the polyoxyethylene polyoxypropylene block polyether is 2,000, purchased from Liaoning Kelong Fine Chemical Co., Ltd., model: L61.

[0041] The propylene oxide-ethylene oxide-vinyl diamine copolymer is purchased from Beijing Baierdi Biotechnology Co., Ltd., product number: CM0996.

[0042] The ionic liquid includes 1-propylsulfonic acid-3-methylimidazolium chloride (CAS No.: 1034558-51-4), 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (CAS No.: 671793-16-1), and 1-methyl acetate-3-methylimidazolium tetrafluoroborate (CAS No.: 805228-31-3) with a mass ratio of 6:2:1.

[0043] The above-mentioned ionic liquids are all purchased from Qingdao Aolike New Material Technology Co., Ltd.

[0044] The preparation method of the humic acid-modified konjac glucomannan is as follows: A konjac glucomannan solution, ascorbic acid, and a humic acid solution are mixed, ultrasonically treated at 205°C for 2 h, a hydrogen peroxide solution is added, and ultrasonically treated at 25°C for 0.5 h, and then dried to obtain the product.

[0045] The konjac glucomannan solution is prepared from konjac glucomannan and water with a mass ratio of 2:100.

[0046] Konjac glucomannan is purchased from Wuhan Kamike Technology Co., Ltd.

[0047] The humic acid solution is prepared from humic acid and water with a mass ratio of 0.8:100.

[0048] Preferably, the mass concentration of the hydrogen peroxide solution is 3%.

[0049] The mass ratio of the konjac glucomannan solution, ascorbic acid, humic acid solution, and hydrogen peroxide solution is 10:0.2:1.5:0.3.

[0050] The preparation method of the above-mentioned pre-coating equipment cleaning agent containing methyl tert-butyl ether is: Mix evenly according to the formula.

[0051] Example 2

[0052] A pre-coating equipment cleaning agent containing methyl tert-butyl ether, calculated by mass percentage, the raw materials include 20% surfactant, 8% methyl tert-butyl ether, 2% ionic liquid, 2% humic acid-modified konjac glucomannan, and water is added to make up the balance to 100%;

[0053] The surfactant includes fatty alcohol polyether phosphate, polyoxyethylene polyoxypropylene block polyether, and propylene oxide-ethylene oxide-vinyl diamine copolymer with a mass ratio of 5:5:2.

[0054] The fatty alcohol polyether phosphate is fatty alcohol polyether phosphate MOA-9P, purchased from Haining Guoli Chemical Co., Ltd.

[0055] The average molecular weight of the polyoxyethylene polyoxypropylene block polyether is 2000, purchased from Liaoning Kelong Fine Chemical Co., Ltd., model: L61.

[0056] The propylene oxide-ethylene oxide-vinyl diamine copolymer is purchased from Beijing Baierdi Biotechnology Co., Ltd., product number: CM0996.

[0057] The ionic liquid includes 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, and 1-methyl acetate-3-methylimidazolium tetrafluoroborate with a mass ratio of 5:1:1.

[0058] The above ionic liquids are all purchased from Qingdao Aolike New Material Technology Co., Ltd.

[0059] The preparation method of the humic acid-modified konjac glucomannan is as follows: Mix the konjac glucomannan solution, ascorbic acid, and humic acid solution, perform ultrasonic treatment at 20°C for 1 h, add hydrogen peroxide solution, perform ultrasonic treatment at 20°C for 0.5 h, and then dry to obtain it.

[0060] The konjac glucomannan solution is prepared from konjac glucomannan and water with a mass ratio of 1:100.

[0061] Konjac glucomannan is purchased from Wuhan Kamike Technology Co., Ltd.

[0062] The humic acid solution is prepared from humic acid and water with a mass ratio of 0.5:100.

[0063] The mass concentration of the hydrogen peroxide solution is 3%.

[0064] The mass ratio of the konjac glucomannan solution, ascorbic acid, humic acid solution, and hydrogen peroxide solution is 8:0.1:1:0.2.

[0065] The preparation method of the above pre-coating equipment cleaning agent containing methyl tert-butyl ether is: Mix evenly according to the formula.

[0066] Example 3

[0067] A pre-coating equipment cleaning agent containing methyl butyl tert-ether, by mass percentage, the raw materials include 30% surfactant, 15% methyl butyl tert-ether, 5% ionic liquid, 5% humic acid-modified konjac glucomannan, and water is added to make up the balance to 100%;

[0068] The surfactant includes fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether, and propylene oxide-ethylene oxide-vinyl diamine copolymer with a mass ratio of 15:10:6.

[0069] The fatty alcohol ether phosphate is fatty alcohol ether phosphate MOA-9P, purchased from Haining Guoli Chemical Co., Ltd.

[0070] The average molecular weight of the polyoxyethylene polyoxypropylene block polyether is 2000, purchased from Liaoning Kelong Fine Chemical Co., Ltd., model: L61.

[0071] The propylene oxide-ethylene oxide-vinyl diamine copolymer is purchased from Beijing Baierdi Biotechnology Co., Ltd., product number: CM0996.

[0072] The ionic liquid includes 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, and 1-methyl acetate-3-methylimidazolium tetrafluoroborate with a mass ratio of 8:3:1.

[0073] The above ionic liquids are all purchased from Qingdao Aolike New Material Technology Co., Ltd.

[0074] The preparation method of the humic acid-modified konjac glucomannan is as follows: Mix konjac glucomannan solution, ascorbic acid, and humic acid solution, perform ultrasonic treatment at 30°C for 2 h, add hydrogen peroxide solution, perform ultrasonic treatment at 30°C for 1 h, and dry to obtain.

[0075] The konjac glucomannan solution is prepared from konjac glucomannan and water with a mass ratio of 3:100.

[0076] Konjac glucomannan is purchased from Wuhan Kamike Technology Co., Ltd.

[0077] The humic acid solution is prepared from humic acid and water with a mass ratio of 1:100.

[0078] The mass concentration of the hydrogen peroxide solution is 3%.

[0079] The mass ratio of the konjac glucomannan solution, ascorbic acid, humic acid solution, and hydrogen peroxide solution is 12:0.3:2:0.5.

[0080] The preparation method of the above pre-coating equipment cleaning agent containing methyl butyl tert-ether is: Mix evenly according to the formula.

[0081] Comparative Example 1

[0082] The difference from Example 1 is that fatty alcohol ether phosphate is replaced with sodium cocoyl glycinate of the same mass; the rest are the same.

[0083] Comparative Example 2

[0084] The difference from Example 1 is that polyoxyethylene polyoxypropylene block polyether is replaced with C10-16 fatty alcohol polyoxyethylene polyoxypropylene ether of the same mass, purchased from Tianmen Hengchang Chemical Co., Ltd.; the rest are the same.

[0085] Comparative Example 3

[0086] The difference from Example 1 is that propylene oxide-ethylene oxide-vinyl diamine copolymer is replaced with coconut oil amide propyl hydroxysulfobetaine of the same mass, purchased from Guangzhou Daosheng Chemical Co., Ltd.; the rest are the same.

[0087] Comparative Example 4

[0088] The difference from Example 1 is that 1-propylsulfonic acid-3-methylimidazolium chloride is replaced with 1-butyl-3-methylimidazolium hexafluorophosphate (CAS No.: 174501-64-5) of the same mass; the rest are the same.

[0089] Comparative Example 5

[0090] The difference from Example 1 is that 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide is replaced with 1-propylsulfonic acid-3-methylimidazolium chloride of the same mass; the rest are the same.

[0091] Comparative Example 6

[0092] The difference from Example 1 is that 1-methyl acetate-3-methylimidazolium tetrafluoroborate is replaced with 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (CAS No.: 671793-16-1) of the same mass; the rest are the same.

[0093] Comparative Example 7

[0094] The difference from Example 1 is that humic acid modified konjac glucomannan is replaced with sodium glutamate diacetate of the same mass; the rest are the same.

[0095] Performance Test:

[0096] 1. Stability:

[0097] (1) High-temperature stability

[0098] Take about 50 mL of the sample in a 100 mL colorless stoppered wide-mouth glass bottle. After stoppering, place it in a constant temperature oven at (60 ± 2)°C. Take it out after 6 h and immediately observe the appearance.

[0099] (2) Low-temperature stability

[0100] Take about 50 mL of the sample in a 100 mL colorless stoppered wide-mouth glass bottle. After stoppering, place it in a refrigerator at (-5 ± 2)°C. Take it out after 24 h and observe the appearance after it returns to room temperature.

[0101] 2. Corrosiveness:

[0102] Place aluminum material 1050 and stainless steel material 304 respectively in different pre-coating equipment cleaning agents (diluted 2 times with water) at 80 ± 2°C for 2 h. Weigh the difference in mass before and after, which is the corrosion amount.

[0103] 3. Cleaning power: It is determined with reference to the standard of GB T35759-2017. The composition of the artificial oil stain is as follows according to the mass ratio formula: barium petroleum sulfonate, 8%; lanolin magnesium soap, 3.5%; lanolin, 2%; industrial vaseline, 30%; No. 20 machine oil, 34.5%; No. 30 machine oil, 12%; calcium base grease, 2%; alumina, 8%.

[0104] 4. Coating good product rate: Place the stainless steel / aluminum composite material (formed by laminating a 2-mm-thick aluminum plate 1050 and a 2-mm-thick stainless steel plate 304 and then rolling and compounding) in the pre-coating equipment cleaning agent (diluted 2 times with water), ultrasonically clean it at 60°C for 20 min, rinse it with pure water for 20 min, dry it and then place it in a vacuum chamber. Use a sputtering target to deposit a silver metal film on the stainless steel / aluminum composite material with a thickness of 3 μm. If the product coating shows any of the situations such as peeling, flaking, color difference, pinholes, bubbles, surface roughness, and the presence of particulate matter, it is recorded as a non-conforming product. The number of samples in each example and comparative example is 50; calculate the good product rate: Good product rate = (total number of products - number of non-conforming products) / total number of products.

[0105] The results are shown in Table 1:

[0106] Table 1 Test results of the pre-coating equipment cleaning agent containing methyl tert-butyl ether in Examples 1-3 and Comparative Examples 1-7

[0107]

[0108]

[0109] As can be seen from Table 1, the pre-coating equipment cleaning agents in Examples 1-3 have good high-temperature stability, low-temperature stability, cleaning power, and PVD coating product good product rate, and have no corrosive effect on aluminum and stainless steel;

[0110] Comparative Example 1: Replace the fatty alcohol ether phosphate with sodium cocoyl glycinate of the same mass; the detergency of the equipment cleaning agent before coating and the yield of PVD coated products decrease;

[0111] Comparative Example 2: Replace the polyoxyethylene polyoxypropylene block polyether with C10-16 fatty alcohol polyoxyethylene polyoxypropylene ether of the same mass; the high-temperature stability and low-temperature stability of the equipment cleaning agent before coating, the detergency and the yield of PVD coated products decrease;

[0112] Comparative Example 3: Replace the propylene oxide-ethylene oxide-vinyl diamine copolymer with cocamidopropyl hydroxysultaine of the same mass; the high-temperature stability of the equipment cleaning agent before coating decreases, and the detergency and the yield of PVD coated products decrease;

[0113] Comparative Example 4: Replace 1-propylsulfonic acid-3-methylimidazolium chloride with 1-butyl-3-methylimidazolium hexafluorophosphate of the same mass; the detergency of the equipment cleaning agent before coating and the yield of PVD coated products decrease;

[0114] Comparative Example 5: Replace 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide with 1-propylsulfonic acid-3-methylimidazolium chloride of the same mass; the equipment cleaning agent before coating has a corrosive effect on aluminum and stainless steel, and the detergency and the yield of PVD coated products decrease;

[0115] Comparative Example 6

[0116] Replace 1-methyl acetate-3-methylimidazolium tetrafluoroborate with 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide of the same mass; the equipment cleaning agent before coating has a corrosive effect on aluminum, and the detergency and the yield of PVD coated products decrease;

[0117] Comparative Example 7: Replace the humic acid-modified konjac glucomannan with sodium glutamate diacetate of the same mass; the equipment cleaning agent before coating has a corrosive effect on aluminum and stainless steel, and the detergency and the yield of PVD coated products decrease.

[0118] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the protection scope of the present invention. Any simple modification or equivalent replacement of the technical solution of the present invention by those of ordinary skill in the art shall not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A pre-plating equipment cleaning agent containing methyl butyl tertiary ether, characterized in that: Calculated by mass percentage, the raw materials include 20-30% of surfactant, 8-15% of methyl butyl tert-ether, 2-5% of ionic liquid, 2-5% of humic acid-modified konjac glucomannan, and water supplementing the balance to 100%; The surfactant comprises fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether and propylene oxide-ethylene oxide-vinyl diamine copolymer in a mass ratio of 5-15:5-10:2-6.

2. The pre-plating equipment cleaning agent containing methyl butyl tertiary ether according to claim 1, characterized in that: The surfactant comprises fatty alcohol ether phosphate, polyoxyethylene polyoxypropylene block polyether and propylene oxide-ethylene oxide-vinyl diamine copolymer in a mass ratio of 10:7:

5.

3. The pre-plating equipment cleaning agent containing methyl butyl tertiary ether according to claim 2, characterized in that: The fatty alcohol ether phosphate is fatty alcohol ether phosphate MOA-9P.

4. The pre-plating equipment cleaning agent containing methyl butyl tertiary ether according to any one of claims 1 to 3, characterized in that: The ionic liquid comprises 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide and 1-methyl acetate-3-methylimidazolium tetrafluoroborate in a mass ratio of 5-8:1-3:

1.

5. The pre-plating equipment cleaning agent containing methyl butyl tertiary ether according to claim 5, characterized in that: The ionic liquid comprises 1-propylsulfonic acid-3-methylimidazolium chloride, 1-carboxymethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide and 1-methyl acetate-3-methylimidazolium tetrafluoroborate in a mass ratio of 6:2:

1.

6. The cleaning agent for equipment before coating containing methyl butyl tertiary ether according to any one of claims 1 to 3, characterized in that: The preparation method of humic acid modified konjac glucomannan comprises the following steps: mixing konjac glucomannan solution, ascorbic acid and humic acid solution, ultrasonic treatment, adding hydrogen peroxide solution, ultrasonic treatment and drying to obtain the product.

7. The pre-plating equipment cleaning agent containing methyl butyl tertiary ether according to claim 6, characterized in that: The preparation method of humic acid modified konjac glucomannan comprises the following steps: mixing konjac glucomannan solution, ascorbic acid and humic acid solution, performing ultrasonic treatment for 1-2 hours at 20-30° C., adding hydrogen peroxide solution, performing ultrasonic treatment for 0.5-1 hour at 20-30° C., and drying to obtain the product.

8. The cleaning agent for equipment before coating containing methyl butyl tertiary ether according to claim 7, characterized in that: The mass ratio of the konjac glucomannan solution, ascorbic acid, humic acid solution and hydrogen peroxide solution is 8-12: 0.1-0.3：1-2：0.2-0.5。 9. The pre-plating equipment cleaning agent containing methyl butyl tertiary ether according to claim 8, characterized in that: The mass ratio of the konjac glucomannan solution, ascorbic acid, humic acid solution and hydrogen peroxide solution is 10:0.2:1.5:0.

3.

10. The method for preparing the pre-plating equipment cleaning agent containing methyl butyl tertiary ether according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing evenly according to the formula.

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