Low-VOC precise instrument cleaning agent and cleaning method

Abstract

The invention provides a low-VOC (volatile organic compound) precise instrument cleaning agent. The low-VOC precise instrument cleaning agent is prepared from trans-dichloroethylene, isopropanol, a fluorocarbon solvent, a dicarbonyl compound and organic amine, the content of the trans-dichloroethylene is not less than 50% by mass, the content of the isopropanol is not less than 1% by mass, the content of the fluorocarbon solvent is not less than 30% by mass, the content of the dicarbonyl compound is not less than 2% by mass, and the content of the organic amine is not less than 1% by mass; wherein the fluorocarbon solvent is one or more of methyl (ethyl) nonafluorobutyl ether, methyl (ethyl) nonafluoroisobutyl ether, 3-methoxy-2-trifluoromethyl octafluorobutane, perfluorotriethylamine, perfluorotripropylamine, perfluorotributylamine, a perfluoropropylene oligomer (dimer or trimer) and perfluorohexanone. The precise cleaning agent prepared through the scheme has good cleaning capacity for scaling powder and metal salt, scaling powder residues on the inner surface and the outer surface of a complex circuit are effectively removed, and an important guarantee is provided for stable production of electronic products.

Description

Technical Field

[0001] The present application relates to the field of chemical technology, and in particular to a low-VOC precision instrument cleaning agent and a cleaning method. Background Art

[0002] Integrated circuits (ICs) are made up of multiple electronic components connected by solder. However, the copper on the circuit board oxidizes, making it difficult for the solder to wet. Organic acids such as rosin are needed to remove the copper oxide from the contact surfaces, allowing the solder to firmly bond the electronic components to the board. Consequently, residual flux and metal salts often remain in soldered ICs. With the continuous advancement of packaging technology, the geometric structures of ICs are becoming increasingly complex, and solder residue is easily retained in some corners, affecting the performance of electronic products.

[0003] Currently, commercially available precision cleaning agents are primarily categorized as hydrocarbon and fluorocarbon cleaners, but both have drawbacks. Flux is primarily composed of fatty acid compounds, so hydrocarbon cleaners offer excellent cleaning capabilities for flux residues. However, hydrocarbons are highly flammable and require stringent operating environments. Furthermore, hydrocarbon cleaners are corrosive to the polymer encapsulation layers of electronic components, limiting their continued use. Fluorocarbon cleaners are primarily based on fluorocarbon solvents, where C—H bonds replace most C—H bonds, making them non-flammable or even non-combustible. However, this significant reduction in C—H bonds significantly reduces their cleaning capabilities.

[0004] By combining these two cleaning agents, a cleaner with both excellent cleaning performance and non-flammability can be created. However, commercially available cleaning agents of this type can only clean organic compounds like mineral oil and rosin, and have poor solubility for copper and tin salts found in flux residues. Furthermore, residual metal salts can affect the performance and lifespan of electronic products. Summary of the Invention

[0005] In view of the above problems, the present application is proposed to provide a low-VOC precision instrument cleaning agent and cleaning method that overcomes the above problems or at least partially solves the above problems, including:

[0006] A low-VOC precision instrument cleaning agent comprising trans-dichloroethylene, isopropyl alcohol, a fluorocarbon solvent, a dicarbonyl compound, and an organic amine;

[0007] By mass, the content of trans-dichloroethylene is not less than 50%, the content of isopropyl alcohol is not less than 1%, the content of fluorocarbon solvent is not less than 30%, the content of dicarbonyl compound is not less than 2%, and the content of organic amine is not less than 1%;

[0008] Wherein, the fluorocarbon solvent is one or more of methyl (ethyl) nonafluorobutyl ether, methyl (ethyl) nonafluoroisobutyl ether, 3-methoxy-2-trifluoromethyl octafluorobutane, perfluorotriethylamine, perfluorotripropylamine, perfluorotributylamine, perfluoropropylene oligomer (dimer or trimer), and perfluorohexanone.

[0009] Furthermore, the dicarbonyl compound is one or more of ethyl acetylacetonate, ethyl acetylacetonate, ethyl trifluoroacetylacetonate, ethyl trifluoroacetylacetonate, and ethyl 1,1,1,3,3-pentafluoroacetylacetonate.

[0010] Furthermore, the organic amine is one or more of triethylamine, diisopropylethylamine, tetramethylethylenediamine, N,N'-dimethylethylenediamine, ethylenediamine, N,N-dimethylethanolamine, aminoethanol, and N-methylethanolamine.

[0011] Furthermore, the content of trans-dichloroethylene is 50-65% by mass.

[0012] Furthermore, the content of the fluorocarbon solvent is 30-40%.

[0013] Furthermore, the content of the isopropyl alcohol is 1-3% by mass.

[0014] Furthermore, the content of the dicarbonyl compound is 2-8% by mass.

[0015] Furthermore, the content of the organic amine is 1-4% by mass.

[0016] A method for cleaning electronic equipment, the cleaning method being implemented by using any one of the precision instrument cleaning agents described above, comprising the steps of:

[0017] Mixing trans-dichloroethylene, isopropyl alcohol, fluorocarbon solvent, dicarbonyl compound and organic amine in a predetermined ratio to obtain a cleaning agent;

[0018] The cleaning agent is used to clean the object to be cleaned in a gas-liquid spraying and flushing manner.

[0019] Furthermore, the mass ratio of the cleaning agent to the residual dirt is 100:10-20.

[0020] This application has the following advantages:

[0021] In the embodiments of the present application, in order to address the shortcomings of the prior art electronic equipment cleaning agents in terms of poor solubility of impurities such as copper salts and tin salts in flux residues and incomplete cleaning, the present application provides a low-VOC precision instrument cleaning agent, comprising trans-dichloroethylene, isopropyl alcohol, fluorocarbon solvents, dicarbonyl compounds and organic amines; measured by mass, the content of trans-dichloroethylene is not less than 50%, the content of isopropyl alcohol is not less than 1%, the content of fluorocarbon solvents is not less than 30%, the content of dicarbonyl compounds is not less than 2%, and the content of organic amines is not less than 1%; wherein the fluorocarbon solvent is one or more of methyl (ethyl) nonafluorobutyl ether, methyl (ethyl) nonafluoroisobutyl ether, 3-methoxy-2-trifluoromethyloctafluorobutane, perfluorotriethylamine, perfluorotripropylamine, perfluorotributylamine, perfluoropropylene oligomers (dimers or trimers), and perfluorohexanone. The precision cleaning agent prepared using this solution has excellent cleaning capabilities for both flux and metal salts, has a low VOC limit, and is non-flammable. Through gas-liquid spraying, it can remove flux residue from the internal and external surfaces of complex circuits, providing a key guarantee for the safe, efficient, and stable production of electronic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for the description of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 This is a cleaning principle diagram of a low-VOC precision instrument cleaning agent provided in one embodiment of the present application;

[0024] Figure 2 This is a flowchart of the steps of a cleaning method for an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0025] To make the objectives, features, and advantages of this application more readily apparent, the present application is further described below in conjunction with the accompanying drawings and specific embodiments. It is apparent that the embodiments described are only a portion of the embodiments of this application, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in this application without inventive effort are also within the scope of protection of this application.

[0026] By analyzing the existing technology, the inventors found that the existing technology cannot effectively remove metal salts on the inner and outer surfaces of integrated circuits, affecting the performance and service life of electronic products. In addition, there are problems such as the flammability of hydrocarbon cleaning agents and the poor cleaning ability of carbon-fluorine cleaning agents.

[0027] In the embodiments of the present application, in order to address the shortcomings of the prior art electronic equipment cleaning agents in terms of poor solubility of impurities such as copper salts and tin salts in flux residues and incomplete cleaning, the present application provides a low-VOC precision instrument cleaning agent, comprising trans-dichloroethylene, isopropyl alcohol, fluorocarbon solvents, dicarbonyl compounds and organic amines; measured by mass, the content of trans-dichloroethylene is not less than 50%, the content of isopropyl alcohol is not less than 1%, the content of fluorocarbon solvents is not less than 30%, the content of dicarbonyl compounds is not less than 2%, and the content of organic amines is not less than 1%; wherein the fluorocarbon solvent is one or more of methyl (ethyl) nonafluorobutyl ether, methyl (ethyl) nonafluoroisobutyl ether, 3-methoxy-2-trifluoromethyloctafluorobutane, perfluorotriethylamine, perfluorotripropylamine, perfluorotributylamine, perfluoropropylene oligomers (dimers or trimers), and perfluorohexanone. The precision cleaning agent prepared using this solution has excellent cleaning capabilities for both flux and metal salts, has a low VOC limit, and is non-flammable. Through gas-liquid spraying, it can remove flux residue from the internal and external surfaces of complex circuits, providing a key guarantee for the safe, efficient, and stable production of electronic products.

[0028] It should be noted that trans-dichloroethylene has good solubility for organic acid components; trace amounts of dicarbonyl compounds and organic amines work synergistically to form soluble complexes with metal salts, which can effectively remove metal salts on circuits; fluorocarbon solvents have weak cleaning ability, but they are non-VOC solvents, which can reduce the overall VOC limit of the cleaning agent and make it less flammable.

[0029] Adding a fluorocarbon solvent can ensure that the precision cleaning agent is non-flammable and reduce the VOC limit to within the prescribed range (900 g / L).

[0030] The addition of isopropyl alcohol improves the cleaning ability of organic acids such as rosin through the hydrogen bonding of the alcohol hydroxyl groups.

[0031] The low-VOC precision instrument cleaning agent proposed in this application is mainly used to clean integrated circuits, precision instruments and other electronic component welds.

[0032] The low-VOC precision instrument cleaning agents proposed in this solution all have strong cleaning capabilities, low VOC content, and low corrosion to metal equipment. They are also non-flammable and environmentally friendly. They have low ingredient costs and simple preparation processes, and can be prepared and used immediately to achieve efficient cleaning.

[0033] Next, a low-VOC precision instrument cleaning agent and cleaning method in this exemplary embodiment will be further described.

[0034] In one embodiment of the present application, the dicarbonyl compound is one or more of ethyl acetylacetonate, ethyl acetylacetonate, ethyl trifluoroacetylacetonate, ethyl trifluoroacetylacetonate, and ethyl 1,1,1,3,3-pentafluoroacetylacetonate.

[0035] It should be noted that the addition of dicarbonyl compounds and organic amines can form soluble complexes with metal salts, allowing the metal salts to dissolve in the cleaning agent and improve the cleaning ability.

[0036] In one embodiment of the present application, the organic amine is one or more of triethylamine, diisopropylethylamine, tetramethylethylenediamine, N,N'-dimethylethylenediamine, ethylenediamine, N,N-dimethylethanolamine, aminoethanol, and N-methylethanolamine.

[0037] In one embodiment of the present application, the content of trans-dichloroethylene is 50-65% by mass.

[0038] In one embodiment of the present application, the content of the fluorocarbon solvent is 30-40% by mass.

[0039] In one embodiment of the present application, the content of the isopropyl alcohol is 1-3% by mass.

[0040] In one embodiment of the present application, the content of the dicarbonyl compound is 2-8% by mass.

[0041] In one embodiment of the present application, the content of the organic amine is 1-4% by mass.

[0042] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 25% methyl nonafluorobutyl ether, 10% methyl nonafluoroisobutyl ether, 6% ethyl acetoacetate, and 4% triethylamine.

[0043] The VOC limit was measured to be 826 g / L, the solubility of rosin was 17 g / 100 g of cleaning agent, and the solubility of copper rosinate was >16 g / 100 g of cleaning agent.

[0044] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 25% ethyl nonafluorobutyl ether, 10% ethyl nonafluoroisobutyl ether, 6% ethyl acetoacetate, and 4% triethylamine.

[0045] The VOC limit was measured to be 830 g / L, the solubility of rosin was 18 g / 100 g of cleaning agent, and the solubility of copper rosinate was 15 g / 100 g of cleaning agent.

[0046] In a specific implementation, the precision cleaning agent comprises, by mass, 57% trans-dichloroethylene, 2% isopropyl alcohol, 25% 3-methoxy-2-trifluoromethyloctafluorobutane, 10% methyl nonafluoroisobutyl ether, 6% ethyl acetoacetate, and 2% triethylamine.

[0047] The VOC limit was measured to be 834 g / L, the solubility of rosin was 16.8 g / 100 g of cleaning agent, and the solubility of copper rosinate was 14.7 g / 100 g of cleaning agent.

[0048] In a specific implementation, the precision cleaning agent comprises, by mass, 57% trans-dichloroethylene, 2% isopropyl alcohol, 25% 3-methoxy-2-trifluoromethyloctafluorobutane, 10% methyl nonafluoroisobutyl ether, 6% ethyl acetoacetate, and 2% tetramethylethylenediamine.

[0049] The VOC limit was measured to be 838 g / L, the solubility in rosin was 17.5 g / 100 g of cleaning agent, and the solubility in rosin acid ketone was >16 / 100 g of cleaning agent.

[0050] In a specific implementation, the precision cleaning agent comprises, by mass, 57% trans-dichloroethylene, 2% isopropyl alcohol, 18% 3-methoxy-2-trifluoromethyloctafluorobutane, 17% methyl nonafluoroisobutyl ether, 6% ethyl trifluoroacetoacetate, and 2% tetramethylethylenediamine.

[0051] The VOC limit was measured to be 818 g / L, the solubility of rosin was 17.8 g / 100 g of cleaning agent, and the solubility of copper rosinate was 15.7 g / 100 g of cleaning agent.

[0052] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 25% 3-methoxy-2-trifluoromethyloctafluorobutane, 10% methyl nonafluoroisobutyl ether, 6% ethyl trifluoroacetoacetate, and 4% triethylamine.

[0053] The VOC limit was measured to be 842 g / L, the solubility of rosin was 18.2 g / 100 g of cleaning agent, and the solubility of copper rosinate was 14.8 g / 100 g of cleaning agent.

[0054] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 10% perfluorohexanone, 25% perfluoropropylene trimer, 6% ethyl acetoacetate, and 4% tetramethylethylenediamine.

[0055] The VOC limit was measured to be 821 g / L, the solubility of rosin was 17.4 g / 100 g of cleaning agent, and the solubility of copper rosinate was 15.4 g / 100 g of cleaning agent.

[0056] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 15% perfluorohexanone, 20% perfluorotributylamine, 6% ethyl acetoacetate, and 4% tetramethylethylenediamine.

[0057] The VOC limit was measured to be 853 g / L, the solubility of rosin was 17.9 g / 100 g of cleaning agent, and the solubility of copper rosinate was 14.8 g / 100 g of cleaning agent.

[0058] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 10% perfluorohexanone, 25% perfluorotripropylamine, 6% ethyl acetoacetate, and 4% tetramethylethylenediamine.

[0059] The VOC limit was measured to be 837 g / L, the solubility in rosin was 16.8 g / 100 g of cleaning agent, and the solubility in copper rosinate was >16 g / 100 g of cleaning agent.

[0060] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 10% perfluorohexanone, 25% perfluorotripropylamine, 6% ethyl acetoacetate, and 4% tetramethylethylenediamine.

[0061] The VOC limit was measured to be 847 g / L, the solubility of rosin was 17.4 g / 100 g of cleaning agent, and the solubility of copper rosinate was 15.2 g / 100 g of cleaning agent.

[0062] In a specific implementation, the precision cleaning agent comprises, by mass, 55% trans-dichloroethylene, 2% isopropyl alcohol, 10% perfluorotriethylamine, 25% 3-methoxy-2-trifluoromethyloctafluorobutane, 6% ethyl acetoacetate, and 4% tetramethylethylenediamine.

[0063] The VOC limit was measured to be 816 g / L, the solubility of rosin was 17.7 g / 100 g of cleaning agent, and the solubility of copper rosinate was 15.5 g / 100 g of cleaning agent.

[0064] In one embodiment of the present application, a method for cleaning PVB conductive paste is further provided, characterized in that the cleaning method is implemented by using any of the water-based cleaning agents described above, comprising the steps of:

[0065] S110, mixing trans-dichloroethylene, isopropyl alcohol, a fluorocarbon solvent, a dicarbonyl compound, and an organic amine in a preset ratio to obtain a cleaning agent;

[0066] S120 , cleaning the object to be cleaned by using the cleaning agent in a gas-liquid spraying and flushing manner.

[0067] In one embodiment of the present application, the mass ratio of the cleaning agent to the residual dirt is 100:10-20.

[0068] It should be noted that this cleaning agent, using a gas-liquid spray system, can effectively remove residual flux and metal salts from the internal and external surfaces of complex circuits. Furthermore, the product is non-flammable, reducing safety concerns. Its low VOC value also allows for applications beyond integrated circuits.

[0069] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0070] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0071] The above is a detailed introduction to a water-based cleaning agent and cleaning method for PVB conductive paste provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A low-VOC precision instrument cleaning agent, characterized in that: Including trans-dichloroethylene, isopropyl alcohol, fluorocarbon solvents, dicarbonyl compounds and organic amines; By mass, the content of trans-dichloroethylene is not less than 50%, the content of isopropyl alcohol is not less than 1%, the content of fluorocarbon solvent is not less than 30%, the content of dicarbonyl compound is not less than 2%, and the content of organic amine is not less than 1%; Wherein, the fluorocarbon solvent is one or more of methyl (ethyl) nonafluorobutyl ether, methyl (ethyl) nonafluoroisobutyl ether, 3-methoxy-2-trifluoromethyl octafluorobutane, perfluorotriethylamine, perfluorotripropylamine, perfluorotributylamine, perfluoropropylene oligomer (dimer or trimer), and perfluorohexanone.

2. The precision instrument cleaning agent according to claim 1, characterized in that The dicarbonyl compound is one or more of ethyl acetylacetonate, ethyl acetylacetonate, ethyl trifluoroacetylacetonate, ethyl trifluoroacetylacetonate, and ethyl 1,1,1,3,3-pentafluoroacetylacetonate.

3. The precision instrument cleaning agent according to claim 1, characterized in that The organic amine is one or more of triethylamine, diisopropylethylamine, tetramethylethylenediamine, N,N'-dimethylethylenediamine, ethylenediamine, N,N-dimethylethanolamine, aminoethanol, and N-methylethanolamine.

4. The precision instrument cleaning agent according to claim 1, characterized in that The content of trans-dichloroethylene is 50-65% by mass.

5. The water-based cleaning agent according to claim 1, characterized in that The content of the fluorocarbon solvent is 30-40% by mass.

6. The precision instrument cleaning agent according to claim 1, characterized in that The content of the isopropyl alcohol is 1-3% by mass.

7. The precision instrument cleaning agent according to claim 1, characterized in that The content of the dicarbonyl compound is 2-8% by mass.

8. The precision instrument cleaning agent according to claim 1, characterized in that The content of the organic amine is 1-4% by mass.

9. A method for cleaning an electronic device, characterized in that: The cleaning method is implemented by the precision instrument cleaning agent according to any one of claims 1 to 8, comprising the steps of: Mixing trans-dichloroethylene, isopropyl alcohol, fluorocarbon solvent, dicarbonyl compound and organic amine in a predetermined ratio to obtain a cleaning agent; The cleaning agent is used to clean the object to be cleaned in a gas-liquid spraying and flushing manner.

10. The method according to claim 9, characterized in that The mass ratio of the cleaning agent to the residual dirt is 100:10-20.

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