An aqueous coating cleaning agent, its preparation method and cleaning efficiency detection method

Abstract

The present invention discloses an aqueous coating cleaning agent, which comprises component A and component B. By weight, component A includes: 3-8 parts of hyperbranched dispersant, 3-6 parts of citric acid, 2-10 parts of non-ionic dispersant, 3-8 parts of ionic dispersant, 3-7 parts of wetting agent, 3-10 parts of solvent, 90-100 parts of deionized water, 0.2-0.6 parts of corrosion inhibitor, and 0.1-0.2 parts of bactericide; component B includes: 5-10 parts of foaming particles and 0.5-1 part of sodium bicarbonate. This cleaning agent selects a hyperbranched dispersant with a dendritic molecular structure and various functional groups, and is used in combination with an ionic dispersant, a non-ionic dispersant and a wetting agent, and has excellent wettability for coatings containing different pigments and fillers; creatively uses foaming particles, and cooperates with citric acid and sodium bicarbonate to increase the contact area between the cleaning agent and the coating in the pipeline, and form a water-gas-water contact state. Therefore, this aqueous coating cleaning agent has good cleaning efficiency.

Description

Technical Field

[0001] The present invention relates to the field of coating cleaning agents. More specifically, it relates to an aqueous coating cleaning agent, a preparation method thereof, and a cleaning efficiency detection method thereof. Background Art

[0002] At present, aqueous coatings are widely used as environmentally friendly coatings. During the whole vehicle spraying process, strict requirements are imposed on the stability of the coatings. At the same time, the sample paints are replaced relatively frequently. Therefore, high requirements are placed on the cleanliness of pipelines and equipment at the site, and an aqueous cleaning agent is needed to clean the pipelines to ensure the cleanliness. Currently, there are few aqueous cleaning agent products for coatings on the market, and the cleaning efficiency for pipelines is low. Residual paint slag often occurs, which affects the spraying effect. At the same time, there are few detection means for the cleaning efficiency of the cleaning agent during the pipeline cleaning process, and the cleaning process of the cleaning agent for pipelines cannot be well simulated.

[0003] Therefore, there is a need to provide a cleaning agent with high cleaning efficiency for aqueous coatings. Summary of the Invention

[0004] One object of the present invention is to provide an aqueous coating cleaning agent that can efficiently remove the remaining coatings in the aqueous coating delivery pipeline.

[0005] The second object of the present invention is to provide a preparation method of an aqueous coating cleaning agent.

[0006] The third object of the present invention is to provide a method for detecting the cleaning efficiency of a coating cleaning agent.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] An aqueous coating cleaning agent includes component A and component B. By weight,

[0009] wherein component A includes: 3 - 8 parts of hyperbranched dispersant, 3 - 6 parts of citric acid, 2 - 10 parts of nonionic dispersant, 3 - 8 parts of ionic dispersant, 3 - 7 parts of wetting agent, 3 - 10 parts of solvent, 90 - 100 parts of deionized water, 0.2 - 0.6 parts of corrosion inhibitor, 0.1 - 0.2 parts of bactericide;

[0010] Component B includes: 5 - 10 parts of foaming particulate matter, 0.5 - 1 part of sodium bicarbonate.

[0011] Optionally, the foaming particulate matter includes carbon dioxide gas bubbles.

[0012] Optionally, the particle diameter size of the foaming particulate matter is 0.5 - 2 mm.

[0013] Optionally, the hyperbranched dispersant is selected from the hyperbranched polyesters of the HyPer H10 series produced by Wuhan Hyperbranched Resin Co., Ltd., WE 3322, and the dispersants of the CYD-DY1800 series produced by Weihai Chenyuan New Material Co., Ltd.

[0014] Optionally, the non-ionic dispersant is selected from the dispersants of low molecular weight unsaturated polycarboxylic acid polymers and polysiloxane copolymers.

[0015] Optionally, the ionic dispersant is a polycarboxylate dispersant.

[0016] Optionally, the wetting agent is a polyether siloxane copolymer.

[0017] Optionally, the solvent is an alcohol ether solvent or an alcohol ester solvent, and the solvent is selected from at least one of propylene glycol phenyl ether (PPH), dipropylene glycol dimethyl ether (DMM), propylene glycol methyl ether (PM), propylene glycol diacetate (PGDA), and propylene glycol methyl ether acetate (PMA).

[0018] Optionally, the corrosion inhibitor is an imidazoline cationic polymer.

[0019] The second object of the present invention is to provide a preparation method of the above-mentioned aqueous coating cleaning agent, comprising the following steps:

[0020] Add 90-100 parts of deionized water into a container, and then add 3-10 parts of solvent, 3-6 parts of sodium citrate, 0.1-0.2 part of bactericide, 0.2-0.6 part of corrosion inhibitor, 2-10 parts of non-ionic dispersant, 3-8 parts of ionic dispersant, 3-8 parts of hyperbranched dispersant, and 3-7 parts of wetting agent under the stirring state of 400-500 r / min, continue to stir until the mixed solution is transparent, and filter to obtain component A;

[0021] Mix 0.5-1 part of sodium bicarbonate and 5-10 parts of foaming particles to obtain component B;

[0022] Add component B to component A and mix evenly to obtain the aqueous coating cleaning agent.

[0023] The third object of the present invention is to provide a method for detecting the cleaning efficiency of a coating cleaning agent, comprising the following steps:

[0024] Under the conditions of room temperature and humidity of 60-75%, place a separatory funnel with a mass of m0 vertically, close the valve, fill the funnel with the aqueous coating, let it stand, open the valve, drain the coating, let it stand, close the valve, and record the mass m1 of the separatory funnel in this state;

[0025] Continue to fill the separatory funnel with the aqueous paint cleaning agent as described in any one of claims 1-8. After standing, invert the funnel 180° twice, let it stand, open the valve to empty the internal liquid, let it stand again, close the valve, and record the mass of the separatory funnel in this state as m2;

[0026] According to the formula: cleaning efficiency = [1 - (m2 - m0) / (m1 - m0)] × 100%, calculate the cleaning efficiency of the aqueous paint cleaning agent.

[0027] The beneficial effects of the present invention are as follows:

[0028] In the aqueous paint cleaning agent of the present invention, a hyperbranched dispersant is selected, which has a dendritic molecular structure and various functional groups, and its viscosity is relatively stronger than other surfactants, which can effectively improve the dirt-carrying capacity of the cleaning agent; when used in combination with ionic dispersants, non-ionic dispersants, and wetting agents, it has excellent wettability for paints containing different pigments and fillers to improve the cleaning efficiency. The use of foaming particles creatively, combined with citric acid and sodium bicarbonate, while increasing the contact area between the cleaning agent and the paint in the pipeline, forms a water-air-water contact state to improve the wetting effect and cleaning efficiency. Therefore, the aqueous paint cleaning agent has good cleaning efficiency.

[0029] At the same time, the present invention also provides a preparation method of the aqueous paint cleaning agent and a detection method for the cleaning efficiency. Detailed Embodiments

[0030] In order to more clearly illustrate the present invention, the following further describes the present invention in conjunction with preferred embodiments. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0031] In the case of clarifying and explaining the purpose of the present invention through the following embodiments, the components of the composition are explained in terms of parts by weight as a general standard. Without special instructions, for the sake of simplicity, the "parts" described in the embodiments of the present invention have the same meaning as parts by weight.

[0032] The present invention provides an aqueous paint cleaning agent, which includes component A and component B. By weight, component A includes: 3-8 parts of hyperbranched dispersant, 3-6 parts of citric acid, 2-10 parts of non-ionic dispersant, 3-8 parts of ionic dispersant, 3-7 parts of wetting agent, 3-10 parts of solvent, 90-100 parts of deionized water, 0.2-0.6 parts of corrosion inhibitor, 0.1-0.2 parts of fungicide; component B includes: 5-10 parts of foaming particles, 0.5-1 part of sodium bicarbonate.

[0033] In the water-based paint cleaning agent, a hyperbranched dispersant is selected, which has a dendritic molecular structure and multiple functional groups, and has a higher viscosity than other surfactants, which can effectively improve the dirt-carrying capacity of the cleaning agent; it is used in combination with ionic dispersants, non-ionic dispersants and wetting agents, and has excellent wettability for coatings containing different pigments and fillers to improve the cleaning efficiency. The foaming particles have the ability to slowly release bubbles in water. After taking away the residual paint, they are easily rinsed with clean water and will not cause secondary pollution to the pipeline. The weak acidity of citric acid is conducive to the release of bubbles from sodium bicarbonate and foaming particles, which increases the contact area between the cleaning agent and the paint in the pipeline, while forming a water-air-water contact state, improving the wetting effect and cleaning efficiency.

[0034] Hyperbranched dispersants are polymers with highly branched structures, such as hyperbranched spherical structures and dendritic polymers with three-dimensional cavity structures. Hyperbranched dispersants with highly branched structures have large steric hindrance, low viscosity and functional groups, are easily adsorbed on the surface of pigments, have high wetting efficiency, and improve the dispersibility and stability of pigment molecules. Those skilled in the art can obtain suitable hyperbranched dispersants through commercial purchases, including but not limited to the HyPer H10 series hyperbranched polyesters produced by Wuhan Hyperbranched Resin Co., Ltd., the BASF-produced WE 3322, CYD-DY1800 series dispersants produced by Weihai Chenyuan Molecular New Materials Co., Ltd., etc.

[0035] The foaming particles in the present invention include carbon dioxide bubbles. The initial state of the foaming particles is particles. After being embedded in the paint block, the compressed carbon dioxide inside it will be released during the subsequent dissolution process, providing a particle impact effect, bursting the paint block, and making the paint easy to be washed out of the pipeline; at the same time, the water-soluble foaming particles have certain stickiness and dispersibility, which is conducive to the dispersion of the paint and further improves the cleaning efficiency. The foaming particles also include a sugar body, and the carbon dioxide bubbles are distributed in the sugar body, wherein the carbon dioxide bubbles are spherical or ellipsoidal, and the material of the sugar body is selected from at least one of fructose, sucrose, and glucose. In the specific implementation process, those skilled in the art can obtain the foaming particles by self-made methods. The present invention provides a possible preparation process: put a water-soluble raw material into a sealed container, heat it, and then inject carbon dioxide into the container with a high-pressure pump to replace the water around the raw material; cool the water-soluble raw material to solidify, continue to pressurize the carbon dioxide gas, so that it replaces water molecules and enters the raw material; then release the pressure in the container, the solid bulk raw material breaks into a number of small particles, and the carbon dioxide enters the small particles to form foaming particles. A preferred embodiment is that the size of the foaming particles is 0.5-2 mm. If the particles are too small, the reaction is fast and the efficiency is low. If the particles are too large, the reaction is slow and residues are easy to remain.

[0036] In the present invention, the non-ionic dispersant and ionic dispersant are used in combination with the hyperbranched dispersant, which have excellent wettability, dispersion effect and viscosity reduction effect on various pigments and fillers, and improve the cleaning efficiency of the cleaning agent. A possible implementation manner is that the non-ionic dispersant is selected from dispersants of low molecular weight unsaturated polycarboxylic acid polymers and polysiloxane copolymers, and the ionic dispersant is a polycarboxylate dispersant. In the specific implementation process, those skilled in the art can obtain suitable dispersants by commercial purchase. Among them, the non-ionic dispersants include, but are not limited to, for example, BYK194 produced by BYK of Germany, GEN1252 produced by OMG of Germany, etc., and the ionic dispersant can be selected as the dispersant produced by Rohm and Haas such as 731A.

[0037] A possible implementation manner is that the wetting agent is a polyether silicone copolymer. The wetting agent has a penetration effect and can help the cleaning agent penetrate into the interior of the coating block until the inner wall of the coating delivery pipe; when used in combination with the dispersant, it reduces the surface tension of the cleaning agent, improves the wetting effect of the cleaning agent, is conducive to the dispersion of the coating block into coating slag, reduces the sedimentation effect, and improves the flushing effect. TEG0245 wetting agent produced by Degussa and BYK346 produced by BYK of Germany, which can be commercially purchased, are both good choices.

[0038] In the specific application process, those skilled in the art can select a suitable solvent according to the type of coating to be cleaned, "generally a combination effect of complete water solubility + partial water solubility". A possible implementation manner is that the solvent is an alcohol ether solvent or an alcohol ester solvent, and is selected from at least one of propylene glycol phenyl ether (PPH), dipropylene glycol dimethyl ether (DMM), propylene glycol methyl ether (PM), propylene glycol diacetate (PGDA), and propylene glycol methyl ether acetate (PMA). Alcohol ether solvents have good solubility and emulsification effects and can dissolve some coating slag well.

[0039] The aqueous coating cleaning agent in the present invention also includes citric acid, which can adjust the entire cleaning agent system to be weakly acidic. Generally, aqueous coatings are weakly alkaline, and a weakly acidic cleaning agent can destroy the stability of the coating slag, reduce its adhesion ability to the pipe wall, and is conducive to the cleaning of the coating slag out of the pipeline; on the other hand, citric acid reacts with sodium bicarbonate to generate gas, promoting the release of carbon dioxide from the foaming particles and forming a water-gas-water contact state in the pipeline; at the same time, sodium citrate also has a certain dispersing effect, which is conducive to the dissolution and dispersion of the coating slag. All of these are conducive to improving the cleaning efficiency of the cleaning agent.

[0040] In addition, the corrosion inhibitor in the present invention is preferably an imidazoline cationic polymer. The corrosion inhibitor can prevent pipeline corrosion, avoid pipeline perforation, and protect metal containers and tanks. For example, BP-8212 produced by Bump Chemical is a special water treatment corrosion inhibitor with good polarity and high corrosion inhibition rate. The bactericide can also be purchased through commercial channels. For example, Xinbocheng SP-1025 anti-corrosion bactericide has good bactericidal effect and safety. The deionized water used in the present invention can be obtained through commercial purchase or self-preparation.

[0041] The second aspect of the present invention provides a preparation method of the above-mentioned aqueous coating cleaning agent, which includes the following steps:

[0042] Add 90-100 parts of deionized water into a container, and then add 3-10 parts of solvent, 3-6 parts of sodium citrate, 0.1-0.2 parts of bactericide, 0.2-0.6 parts of corrosion inhibitor, 2-10 parts of non-ionic dispersant, 3-8 parts of ionic dispersant, 3-8 parts of hyperbranched dispersant and 3-7 parts of wetting agent under the stirring state of 400-500 r / min, and continue to stir until the mixed solution is transparent, and filter to obtain component A;

[0043] Mix 0.5-1 part of sodium bicarbonate and 5-10 parts of foaming particles to obtain component B;

[0044] Add component B to component A and mix evenly to obtain the aqueous coating cleaning agent.

[0045] In the specific implementation process, the addition of component B to component A is carried out before use. According to the construction requirements, an appropriate amount of deionized water can also be added for dilution.

[0046] The third aspect of the present invention provides a method for detecting the cleaning efficiency of the coating cleaning agent, which includes the following steps:

[0047] Under the conditions of room temperature and humidity of 60-75%, place a separating funnel with a mass of m0 vertically, close the valve, fill the separating funnel with the aqueous coating, let it stand, then open the valve, empty the coating, let it stand, close the valve, and record the mass m1 of the separating funnel in this state;

[0048] Continue to fill the separating funnel with the above-mentioned aqueous coating cleaning agent, let it stand, invert the funnel 180° twice, let it stand, open the valve, empty the internal liquid, let it stand, close the valve, and record the mass of the separating funnel in this state as m2;

[0049] According to the formula: cleaning efficiency = [1 - (m2 - m0) / (m1 - m0)] × 100%, calculate the cleaning efficiency of the aqueous coating cleaning agent.

[0050] In the specific implementation process, the standard for filling the separating funnel with the water-based coating is that the liquid level of the water-based coating is 2 mm ± 1 mm from the lower neck of the liquid adding port, and the standard for filling the separating funnel with the water-based coating cleaning agent is that the liquid level of the water-based coating cleaning agent is 4 mm ± 1 mm from the lower neck of the liquid adding port. The standing time after filling with the water-based coating or the water-based coating cleaning agent is 28 - 32 s; after emptying the coating or the internal liquid, before closing the valve, the standing time is 58 - 62 s; the standing time after the funnel is inverted 180° twice is 28 - 32 s. Depending on the material of the coating pipeline, a separating funnel made of glass or plastic can be selected for detection to simulate the pipeline transportation process as accurately as possible.

[0051] Using a separating funnel as the detection container, the spherical funnel part mainly conducts the process of the cleaning agent dissolving the water-based coating, while the lower pipeline part can simulate the process of the cleaning agent flushing the coating. The less coating residue remains on the inner wall of the separating funnel, the better the cleaning efficiency of the cleaning agent.

[0052] Next, the technical solutions in the present invention will be described in conjunction with specific embodiments.

[0053] Embodiment

[0054] Examples 1 - 3

[0055] According to the formula in Table 1, prepare a water-based coating cleaning agent:

[0056] Add deionized water to the container, and then add the solvent, sodium citrate, bactericide, corrosion inhibitor, non-ionic dispersant, ionic dispersant, hyperbranched dispersant, and wetting agent under stirring at 400 - 500 r / min. Continue stirring until the mixed solution is transparent, and filter to obtain Component A;

[0057] Mix sodium bicarbonate and foaming particulate matter 1 to obtain Component B;

[0058] Add Component B to Component A to obtain the water-based coating cleaning agent.

[0059] The preparation process of the foaming particulate matter 1 is as follows:

[0060] (1) Place raw materials such as sucrose, maltose, glucose, and fructose in a closed reaction kettle, heat to 150 degrees, and then inject carbon dioxide under high pressure.

[0061] (2) Maintain high pressure and at the same time cool down to room temperature to make the liquid become solid.

[0062] (3) Release the pressure, take out the solid particles, filter and screen them, and select the biological foaming particulate matter with a particle size of 0.5 - 2 mm.

[0063] Table 1 Formulation of the water-based coating cleaning agent in Examples 1 - 3

[0064]

[0065] Comparative example

[0066] Comparative examples 1 - 3

[0067] Prepare an aqueous coating cleaning agent according to the formulation in Table 2, and its preparation method is the same as that of the examples.

[0068] Among them, the preparation process of the foaming particulate matter 2 in Comparative Example 1 is as follows:

[0069] (1) Place raw materials such as sucrose, maltose, glucose, and fructose in a closed reaction kettle, heat to 150 °C, and then inject carbon dioxide under high pressure.

[0070] (2) Maintain high pressure, and at the same time cool down to room temperature to make the liquid solidify.

[0071] (3) Release the pressure, take out the solid particles, filter and screen them, and select the biological foaming particulate matter with a particle size > 3 mm.

[0072] Formulation of the aqueous coating cleaning agent in Comparative examples 1 - 3 in Table 2

[0073]

[0074] Detection example

[0075] Under the conditions of room temperature and humidity of 60 - 75%, place a separating funnel with a mass of m0 vertically, close the valve, fill the separating funnel with the aqueous coating, let it stand, then open the valve, empty the coating, let it stand, close the valve, and record the mass m1 of the separating funnel in this state;

[0076] Continue to fill the separating funnel with the aqueous coating cleaning agents in Examples 1 - 3 and Comparative examples 1 - 3, let it stand, invert the funnel 180° twice, let it stand, open the valve, empty the internal liquid, let it stand, close the valve, and record the mass of the separating funnel in this state as m2;

[0077] According to the formula: cleaning efficiency = [1 - (m2 - m0) / (m1 - m0)] × 100%, calculate the cleaning efficiency of the aqueous coating cleaning agent.

[0078] In the specific implementation process, the standard for filling the separatory funnel with waterborne paint is that the liquid level of the waterborne paint is 2 mm ± 1 mm away from the lower neck of the liquid addition port, and the standard for filling the separatory funnel with waterborne paint cleaning agent is that the liquid level of the waterborne paint cleaning agent is 4 mm ± 1 mm away from the lower neck of the liquid addition port. The standing time after filling with waterborne paint or waterborne paint cleaning agent is 28 - 32 s; after emptying the paint or the internal liquid, before closing the valve, the standing time is 58 - 62 s; the standing time after the funnel is inverted 180° twice is 28 - 32 s. According to the different materials of the paint pipeline, a glass or plastic separatory funnel can be selected for detection to simulate the pipeline transportation process as accurately as possible.

[0079] Using a separatory funnel as the detection container, the spherical funnel part mainly conducts the dissolution process of the cleaning agent on the waterborne paint, while the lower pipeline part can simulate the flushing process of the cleaning agent on the paint. The less paint residue remains on the inner wall of the separatory funnel, the better the cleaning efficiency of the cleaning agent.

[0080] Table 3 Detection results of waterborne paint cleaning agents in Examples 1 - 3 and Comparative Examples 1 - 3

[0081]

[0082] It can be seen from the above data that in the formula, the hyperbranched dispersant and the foaming particles should have appropriate proportions and dosages to achieve better cleaning effects. When the foaming particles are lacking, the flushing effect will be reduced. When the hyperbranched dispersant is lacking, the dispersing ability of the cleaning agent for the residual paint liquid will be reduced. In Comparative Example 1, when the particle size of the foaming particles is larger (relatively fewer particle numbers), the impact effect on the residue will be worse. At the same time, with a larger particle size, the dissolution rate is slow, and the adhesion to the residue will also be weaker. In Comparative Example 2, no foaming particles were used, lacking the impact and adhesion effects on the residue, so the scrubbing effect of the cleaning agent on the residue is worse. In Comparative Example 3, no hyperbranched dispersant was added, thus reducing the re-dissolving ability of the cleaning agent for the paint liquid and resulting in a poor cleaning effect.

[0083] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, based on the above description, other different forms of changes or modifications can be made. It is impossible to list all the implementation manners here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. An aqueous coating cleaning agent, characterized in that, It consists of component A and component B. By weight, component A consists of 3 - 8 parts of hyperbranched dispersant, 3 - 6 parts of citric acid, 2 - 10 parts of non-ionic dispersant, 3 - 8 parts of ionic dispersant, 3 - 7 parts of wetting agent, 3 - 10 parts of solvent, 90 - 100 parts of deionized water, 0.2 - 0.6 parts of corrosion inhibitor, and 0.1 - 0.2 parts of bactericide; component B consists of 5 - 10 parts of foaming particulate matter and 0.5 - 1 part of sodium bicarbonate; The foaming particulate matter includes carbon dioxide gas bubbles; the size of the foaming particulate matter is 0.5 - 2 mm; The hyperbranched dispersant is selected from the HyPer H10 series of hyperbranched polyesters produced by Wuhan Hyperbranched Resin Co., Ltd., WE 3322, and the CYD-DY1800 series of dispersants produced by Weihai Chenyuan New Materials Co., Ltd.; The non-ionic dispersant is selected from dispersants of low molecular weight unsaturated polycarboxylic acid polymers and polysiloxane copolymers; The ionic dispersant is a polycarboxylate dispersant; The wetting agent is a polyether siloxane copolymer; The solvent is an alcohol ether solvent or an alcohol ester solvent; The preparation method of the aqueous coating cleaning agent includes the following steps: Add 90 - 100 parts of deionized water into a container, and then add 3 - 10 parts of solvent, 3 - 6 parts of citric acid, 0.1 - 0.2 parts of bactericide, 0.2 - 0.6 parts of corrosion inhibitor, 2 - 10 parts of non-ionic dispersant, 3 - 8 parts of ionic dispersant, 3 - 8 parts of hyperbranched dispersant, and 3 - 7 parts of wetting agent under stirring at 400 - 500 r / min. Continue stirring until the mixed solution is transparent, and filter to obtain component A; Mix 0.5 - 1 part of sodium bicarbonate and 5 - 10 parts of foaming particulate matter to obtain component B; Add component B to component A and mix evenly to obtain the aqueous coating cleaning agent.

2. The aqueous coating cleaner according to claim 1, wherein The solvent is selected from at least one of propylene glycol phenyl ether, dipropylene glycol dimethyl ether, propylene glycol methyl ether, propylene glycol diacetate, and propylene glycol methyl ether acetate.

3. The aqueous coating cleaner according to claim 1, wherein The corrosion inhibitor is an imidazoline cationic polymer.

4. A preparation method of the aqueous coating cleaning agent according to any one of claims 1-3, characterized in that, It includes the following steps: Add 90 - 100 parts of deionized water into a container, and then add 3 - 10 parts of solvent, 3 - 6 parts of citric acid, 0.1 - 0.2 parts of bactericide, 0.2 - 0.6 parts of corrosion inhibitor, 2 - 10 parts of non-ionic dispersant, 3 - 8 parts of ionic dispersant, 3 - 8 parts of hyperbranched dispersant, and 3 - 7 parts of wetting agent under stirring at 400 - 500 r / min. Continue stirring until the mixed solution is transparent, and filter to obtain component A; Mix 0.5 - 1 part of sodium bicarbonate and 5 - 10 parts of foaming particulate matter to obtain component B; Add component B to component A and mix evenly to obtain the aqueous coating cleaning agent.

5. A method for detecting the cleaning efficiency of a coating cleaning agent, characterized in that, It includes the following steps: Under the conditions of room temperature and humidity of 60 - 75%, vertically place a separatory funnel with a mass of m0, close the valve, fill the funnel with aqueous coating, let it stand, open the valve, empty the coating, let it stand, close the valve, and record the mass m1 of the separatory funnel in this state; Continue to fill the separatory funnel with the aqueous coating cleaning agent as described in any one of claims 1 - 3, let it stand, invert the funnel 180° twice, let it stand, open the valve, empty the internal liquid, let it stand, close the valve, and record the mass of the separatory funnel in this state as m2; According to the formula: cleaning efficiency = [1 - (m2 - m0) / (m1 - m0)]×100%, calculate the cleaning efficiency of the aqueous coating cleaning agent.

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