High performance flux and method of making same

Abstract

The application discloses a kind of high-performance flux and preparation method thereof, belong to the field of flux for soldering agent in photovoltaic industry, by mass percentage comprising the following components: modified volatile silicone oil 90.0-94.0%, activator 2.0-4.0%, surfactant 2.0-4.0%, film forming agent 1.0-3.0%, corrosion inhibitor 1.0-3.0%, the modified volatile silicone oil includes modified cyclosiloxane polymer, and activator, surfactant and film forming agent and corrosion inhibitor are configured in proportion with modified volatile silicone oil as solvent.The beneficial effects of the present application are: using modified volatile silicone oil as the solvent of flux, with high flash point high volatile, non-toxic and harmless excellent characteristics, will not cause workshop fire accident, will not cause workshop staff physical and mental health damage;And its surface tension is low and ductility is good, more easily wet the surface of welding strip, can improve the welding effect, no need to clean after welding.

Description

Technical Field

[0001] This invention relates to the field of fluxes for welding in the photovoltaic industry, and more specifically, to a high-performance flux and its preparation method. Background Technology

[0002] The flux used in photovoltaic modules is generally a mixture of isopropanol or a mixture of isopropanol and ethanol as solvents, along with activators, surfactants, film-forming agents, and corrosion inhibitors in specific proportions. Flux is an auxiliary material used during soldering, its main function being to remove oxides from the surfaces of the solder and the materials being soldered, achieving the necessary cleanliness of the metal surface; to prevent re-oxidation of the surface during soldering; to reduce the surface tension of the solder; and to improve soldering performance.

[0003] However, organic solvents (alcohols) have low flash point characteristics, with a flash point <25℃, which means they are flammable and explosive, and can easily cause workshop fires. Furthermore, some unscrupulous manufacturers use industrial alcohol as a raw material for flux in order to reduce costs. Since industrial alcohol contains toxic methanol, it can damage the physical and mental health of workshop employees.

[0004] To address the aforementioned issues, water-based fluxes can mitigate potential fire hazards in the workshop and prevent methanol poisoning. Existing technologies, such as CN 113681199 A, describe an inorganic flux and its preparation method that does not contain strong acids, using water as a solvent. CN 114012306 A also mentions a water-based flux and its preparation method. However, most water-based no-clean fluxes contain non-volatile organic compounds, which can generate micro-solder balls during soldering, affecting the soldering effect. Furthermore, water-based fluxes suffer from drawbacks such as complex formulations, unstable performance, high solids content, and difficulty in cleaning residues from the board surface.

[0005] In view of this, using organic solvents (alcohols) or water as flux solvents can lead to various problems such as workshop safety hazards, employee health damage, or poor welding results. It is necessary to provide an improved technical solution to solve the above problems. Summary of the Invention

[0006] To overcome the problems existing in the prior art where organic solvents (alcohols) or water are used as flux solvents in terms of workshop safety, employee health, or welding effect, this invention provides a high-performance flux, comprising the following components by mass percentage:

[0007]

[0008] Modified volatile silicone oil is used as the flux solvent. It has excellent characteristics of high flash point, high volatility, non-toxicity and harmlessness. It will not cause workshop fire accidents or damage to the physical and mental health of workshop employees. Moreover, it has low surface tension and good ductility, which makes it easier to wet the surface of the solder strip, improves the welding effect, and eliminates the need for cleaning after welding.

[0009] Preferably, the modified volatile silicone oil comprises a modified cyclosiloxane polymer.

[0010] Preferably, the modified cyclosiloxane polymer is one or a combination of two of modified cyclodecamethylcyclopentasiloxane and modified cyclododecylhexasiloxane.

[0011] Preferably, the modified volatile silicone oil has a viscosity of 1000-10000 mm² / s and a flash point >300℃.

[0012] The use of modified volatile silicone oil is key to flux preparation, and the modified volatile silicone oil is preferably prepared using the following method:

[0013] Step S101: Prepare low-viscosity volatile silicone oil, which exhibits different viscosities depending on the number of chain segments n; use the catalytic equilibrium method to make it have high fluidity; the reaction mechanism of the catalytic equilibrium method is that cyclosiloxanes can undergo ring-opening polymerization to generate linear polysiloxanes under the action of catalyst and temperature.

[0014] The reaction in the catalytic equilibrium method uses acidic clay as a catalyst. Acidic clay is generally natural bleaching clay, that is, a white or grayish-white clay that is naturally produced and has bleaching properties. It is mainly composed of montmorillonite, albite, and quartz.

[0015] 90 parts by weight of volatile silicone oil and 10 parts by weight of acidic clay were placed in a reaction vessel, stirred at a speed of 100-200 r / min, and the temperature was controlled at 180-200℃ to carry out a catalytic reaction for 1-2 hours. After the reaction was completed, the solution was filtered to remove impurities, and a low-viscosity volatile silicone oil with high fluidity, a viscosity of 1000-10000 mm2 / s, and a flash point >300℃ was obtained.

[0016] The volatile silicone oil is one or a combination of two of cyclodecamethylcyclopentasiloxane and cyclododecylhexasiloxane.

[0017] Step S102: Dissolve 10 parts by mass of chloroplatinic acid in 90 parts by mass of ethanol solution to obtain an ethanol solution of chloroplatinic acid.

[0018] In step S103, the low-viscosity volatile silicone oil needs to be further modified to make it compatible with other auxiliary materials of the flux; the modification mechanism is that some of the siloxane chains in the volatile silicone oil are replaced by polyether segments.

[0019] The catalyst used was an ethanol solution of chloroplatinic acid. Chloroplatinic acid is an inorganic compound with the chemical formula H2PtCl6. It is an orange-yellow powder that is soluble in water, ethanol, and acetone. It is mainly used as the active ingredient in hydrodehydrogenation catalysts in petrochemicals and can also be used as a catalyst. Before this operation, chloroplatinic acid was dissolved in an ethanol solution for easy use.

[0020] 80 parts by weight of low-viscosity volatile silicone oil, 15 parts by weight of polyether, and 5 parts by weight of ethylbenzene are placed in a reaction vessel. The mixture is stirred at a speed of 100-200 r / min, nitrogen gas is introduced, and the mixture is heated to 150-180℃. 10 parts by weight of ethanol solution of chloroplatinic acid is added as a catalyst, and the reaction is carried out at this temperature for 1-2 hours. After the reaction is completed, ethylbenzene and intermediate small molecules are removed by vacuum distillation to obtain volatile silicone oil containing polyether segments, namely one or both of modified cyclodecamethylcyclopentasiloxane and modified cyclododecylhexasiloxane.

[0021] Preferably, the surfactant is one or a combination of two of hexadecyltrimethylammonium bromide and quaternary ammonium fluoroalkyl compounds.

[0022] Preferably, the film-forming agent is one or a combination of two or more of the following: polyethylene oxide, polyvinyl alcohol, sorbitol, polyacrylamide, modified acrylic resin, and glyceryl stearate.

[0023] Preferably, the corrosion inhibitor is one or a combination of two or more of benzothiazole, α-mercaptobenzothiazole, benzotriazole, benzimidazole and methylbenzimidazole.

[0024] Preferably, the activator is a mixed solution comprising organic acids and organic amines.

[0025] The present invention also provides a method for preparing the above-mentioned high-performance flux, comprising the following steps:

[0026] Step S100: The activator is added to the modified volatile silicone oil by dropping it dropwise in proportion, while stirring the solution at 2500-3000 rpm to make it evenly mixed; after the dropwise addition is completed, stirring is continued for 0.5-2 hours, and then the mixture is allowed to stand for 1-2 hours to obtain the first mixed solution.

[0027] In step S200, the surfactant is added to the first mixed solution in proportion by dropping, while stirring the solution at 2500-3000 rpm to make it evenly mixed; after the dropping is completed, stirring is continued for 0.5-2 hours, and then the solution is allowed to stand for 1-2 hours to obtain the second mixed solution.

[0028] In step S300, the film-forming agent is added to the second mixed solution in proportion by dropping, while stirring the solution at 2500-3000 rpm to make it evenly mixed; after the dropping is completed, continue stirring for 0.5-2 hours, and let it stand for 1-2 hours to obtain the third mixed solution.

[0029] In step S400, the corrosion inhibitor is added to the third mixed solution in proportion by dripping, while stirring the solution at 2500-3000 rpm to ensure uniform mixing. After the dripping is completed, stirring is continued for 0.5-2 hours. After filtration, the solution is allowed to stand for 1-2 hours to obtain the finished product.

[0030] Preferably, the activator is prepared as follows:

[0031] The organic acid and organic amine are stirred evenly at room temperature for 1-2 hours. After stirring, the mixture is filtered through a 100-300 mesh sieve to obtain an organic acid solution with a pH of 5-7 and a concentration of 3-5%. The solution is then allowed to stand for 0.5-2 hours to obtain the desired activator.

[0032] Preferably, the organic acid is one or a combination of two or more of lauric acid, citric acid, succinic acid, glutaric acid and adipic acid.

[0033] Preferably, the organic amine is one or a combination of two or more of dimethylamine, ethylamine, and triethanolamine.

[0034] Beneficial effects:

[0035] The beneficial effects of adopting the technical solution of this invention are as follows:

[0036] (1) Modified volatile silicone oil is used as the solvent of flux. It has the excellent characteristics of high flash point, high volatility, non-toxicity and harmlessness. It will not cause workshop fire accidents and will not cause damage to the physical and mental health of workshop employees. Moreover, it has low surface tension and good ductility, which makes it easier to wet the surface of the solder strip and improve the welding effect. No cleaning is required after welding.

[0037] (2) Modify the volatile silicone oil and use it as a flux solvent. By utilizing the high fluidity, low viscosity, non-flammability and non-toxicity of the modified volatile silicone oil, the occurrence of workshop fire accidents can be effectively avoided, and the physical and mental health of workshop employees will not be damaged. At the same time, the welding effect can be improved. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0039] This embodiment uses modified volatile silicone oil as the flux solvent, which has excellent characteristics of high flash point, high volatility, non-toxicity, and harmlessness. It will not cause workshop fire accidents or harm the physical and mental health of workshop employees. Moreover, its low surface tension and good ductility make it easier to wet the solder ribbon surface, which can improve the welding effect, and no cleaning is required after welding. The specific implementation method is as follows:

[0040] A high-performance flux comprises the following components by weight percentage:

[0041]

[0042] Modified volatile silicone oil is used as the flux solvent. It has excellent characteristics of high flash point, high volatility, non-toxicity and harmlessness. It will not cause workshop fire accidents or damage to the physical and mental health of workshop employees. Moreover, it has low surface tension and good ductility, which makes it easier to wet the surface of the solder strip, improves the welding effect, and eliminates the need for cleaning after welding.

[0043] In a preferred embodiment, the modified volatile silicone oil comprises a modified cyclosiloxane polymer.

[0044] In a preferred embodiment, the modified cyclosiloxane polymer is one or a combination of two of modified cyclodecamethylcyclopentasiloxane and modified cyclododecylhexasiloxane.

[0045] In a preferred embodiment, the modified volatile silicone oil has a viscosity of 1000-10000 mm² / s and a flash point >300℃.

[0046] The use of modified volatile silicone oil is key to flux preparation, and the modified volatile silicone oil is preferably prepared using the following method:

[0047] Step S101: Prepare low-viscosity volatile silicone oil, which exhibits different viscosities depending on the number of chain segments n; use the catalytic equilibrium method to make it have high fluidity; the reaction mechanism of the catalytic equilibrium method is that cyclosiloxanes can undergo ring-opening polymerization to generate linear polysiloxanes under the action of catalyst and temperature.

[0048] The reaction in the catalytic equilibrium method uses acidic clay as a catalyst. Acidic clay is generally natural bleaching clay, that is, a white or grayish-white clay that is naturally produced and has bleaching properties. It is mainly composed of montmorillonite, albite, and quartz.

[0049] 90 parts by weight of volatile silicone oil and 10 parts by weight of acidic clay were placed in a reaction vessel, stirred at a speed of 100-200 r / min, and the temperature was controlled at 180-200℃ to carry out a catalytic reaction for 1-2 hours. After the reaction was completed, the solution was filtered to remove impurities, and a low-viscosity volatile silicone oil with high fluidity, a viscosity of 1000-10000 mm2 / s, and a flash point >300℃ was obtained.

[0050] The volatile silicone oil is one or a combination of two of cyclodecamethylcyclopentasiloxane and cyclododecylhexasiloxane.

[0051] Step S102: Dissolve 10 parts by mass of chloroplatinic acid in 90 parts by mass of ethanol solution to obtain an ethanol solution of chloroplatinic acid.

[0052] In step S103, the low-viscosity volatile silicone oil needs to be further modified to make it compatible with other auxiliary materials of the flux; the modification mechanism is that some of the siloxane chains in the volatile silicone oil are replaced by polyether segments.

[0053] The catalyst used was an ethanol solution of chloroplatinic acid. Chloroplatinic acid is an inorganic compound with the chemical formula H2PtCl6. It is an orange-yellow powder that is soluble in water, ethanol, and acetone. It is mainly used as the active ingredient in hydrodehydrogenation catalysts in petrochemicals and can also be used as a catalyst. Before this operation, chloroplatinic acid was dissolved in an ethanol solution for easy use.

[0054] 80 parts by weight of low-viscosity volatile silicone oil, 15 parts by weight of polyether, and 5 parts by weight of ethylbenzene are placed in a reaction vessel. The mixture is stirred at a speed of 100-200 r / min, nitrogen gas is introduced, and the mixture is heated to 150-180℃. 10 parts by weight of ethanol solution of chloroplatinic acid is added as a catalyst, and the reaction is carried out at this temperature for 1-2 hours. After the reaction is completed, ethylbenzene and intermediate small molecules are removed by vacuum distillation to obtain volatile silicone oil containing polyether segments, namely one or both of modified cyclodecamethylcyclopentasiloxane and modified cyclododecylhexasiloxane.

[0055] In a preferred embodiment, the surfactant is one or a combination of two of hexadecyltrimethylammonium bromide and quaternary ammonium fluoroalkyl compounds.

[0056] In a preferred embodiment, the film-forming agent is one or a combination of two or more of the following: polyoxyethylene, polyvinyl alcohol, sorbitol, polyacrylamide, modified acrylic resin, and glyceryl stearate.

[0057] In a preferred embodiment, the corrosion inhibitor is one or a combination of two or more of benzothiazole, α-mercaptobenzothiazole, benzotriazole, benzimidazole and methylbenzimidazole.

[0058] In a preferred embodiment, the activator is a mixed solution comprising organic acids and organic amines.

[0059] This embodiment also provides a method for preparing the above-mentioned high-performance flux, comprising the following steps:

[0060] Step S100: The activator is added to the modified volatile silicone oil by dropping it dropwise in proportion, while stirring the solution at 2500-3000 rpm to make it evenly mixed; after the dropwise addition is completed, stirring is continued for 0.5-2 hours, and then the mixture is allowed to stand for 1-2 hours to obtain the first mixed solution.

[0061] In step S200, the surfactant is added to the first mixed solution in proportion by dropping, while stirring the solution at 2500-3000 rpm to make it evenly mixed; after the dropping is completed, stirring is continued for 0.5-2 hours, and then the solution is allowed to stand for 1-2 hours to obtain the second mixed solution.

[0062] In step S300, the film-forming agent is added to the second mixed solution in proportion by dropping, while stirring the solution at 2500-3000 rpm to make it evenly mixed; after the dropping is completed, continue stirring for 0.5-2 hours, and let it stand for 1-2 hours to obtain the third mixed solution.

[0063] In step S400, the corrosion inhibitor is added to the third mixed solution in proportion by dripping, while stirring the solution at 2500-3000 rpm to ensure uniform mixing. After the dripping is completed, stirring is continued for 0.5-2 hours. After filtration, the solution is allowed to stand for 1-2 hours to obtain the finished product.

[0064] As a preferred embodiment, the activator preparation process is as follows:

[0065] The organic acid and organic amine are stirred evenly at room temperature for 1-2 hours. After stirring, the mixture is filtered through a 100-300 mesh sieve to obtain an organic acid solution with a pH of 5-7 and a concentration of 3-5%. The solution is then allowed to stand for 0.5-2 hours to obtain the desired activator.

[0066] In a preferred embodiment, the organic acid is one or a combination of two or more of lauric acid, citric acid, succinic acid, glutaric acid, and adipic acid.

[0067] In a preferred embodiment, the organic amine is one or a combination of two or more of dimethylamine, ethylamine, and triethanolamine.

[0068] In a preferred embodiment, the organic amine is triethanolamine, the mass ratio of the organic acid to triethanolamine is 2:1, and the mass ratio of citric acid to succinic acid in the organic acid is 1:1.

[0069] The following ten examples further illustrate the beneficial effects of using the high-performance flux and its preparation method described in this embodiment.

[0070] Example 1:

[0071] A method for preparing a flux includes the following steps:

[0072] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0073] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0074] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0075] Step 4: Add 2 parts by weight of the film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the dropwise addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0076] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh filter sieve. The corrosion inhibitor used is benzothiazole.

[0077] Example 2:

[0078] A method for preparing a flux includes the following steps:

[0079] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous. After stirring for 1 hour, filter through a 200-mesh sieve to obtain an organic acid solution with a pH of 6 and a concentration of 3%. Let stand for 1 hour to obtain the activator. The organic amine is triethanolamine, and the mass ratio between the organic acid and triethanolamine is 2:1. The mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0080] Step 2: Add 3 parts by mass of activator to 90 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0081] Step 3: Add 3 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1 hour to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0082] Step 4: Add 3 parts by weight of film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1 hour to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0083] Step 5: Add 1 part by mass of the corrosion inhibitor to the third mixed solution dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter, and let stand for 2 hours to obtain the finished product. The filtration process involves filtering through a 3000-mesh sieve; the corrosion inhibitor is benzothiazole.

[0084] Example 3:

[0085] A method for preparing a flux includes the following steps:

[0086] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature for 2 hours, filter through a 200-mesh sieve to obtain a 5% organic acid solution with a pH of 6. Let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0087] Step 2: Add 3.0 parts by weight of activator to 88 parts by weight of modified volatile silicone oil by dropping it dropwise while stirring the solution at 3000 rpm to make it evenly mixed; after the dropwise addition is completed, continue stirring for 1 hour and let it stand for 2 hours to obtain the first mixed solution; wherein the modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0088] Step 3: Add 3.0 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 3000 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0089] Step 4: Add 3.0 parts by weight of film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 3000 rpm to ensure uniform mixing. After the dropwise addition is complete, continue stirring for 1 hour and let it stand for 2 hours to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0090] Step 5: Add 3.0 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 3000 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 4000-mesh sieve. The corrosion inhibitor used is benzothiazole.

[0091] Example 4:

[0092] A method for preparing a flux includes the following steps:

[0093] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0094] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is modified cyclododecyl hexasiloxane.

[0095] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0096] Step 4: Add 2 parts by weight of the film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the dropwise addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0097] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh filter sieve. The corrosion inhibitor used is benzothiazole.

[0098] Example 5:

[0099] A method for preparing a flux includes the following steps:

[0100] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0101] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping the solution while stirring at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is a combination of cyclodecamethylcyclopentasiloxane and modified cyclododecylhexasiloxane, and the mass ratio of the two is 1:1.

[0102] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0103] Step 4: Add 2 parts by weight of the film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the dropwise addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0104] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh filter sieve. The corrosion inhibitor used is benzothiazole.

[0105] Example 6:

[0106] A method for preparing a flux includes the following steps:

[0107] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0108] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0109] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is a quaternary ammonium fluoroalkyl compound.

[0110] Step 4: Add 2 parts by weight of the film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the dropwise addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0111] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh filter sieve. The corrosion inhibitor used is benzothiazole.

[0112] Example 7:

[0113] A method for preparing a flux includes the following steps:

[0114] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0115] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0116] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0117] Step 4: Add 2 parts by mass of film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is polyvinyl alcohol.

[0118] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh filter sieve. The corrosion inhibitor used is benzothiazole.

[0119] Example 8:

[0120] A method for preparing a flux includes the following steps:

[0121] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0122] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0123] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0124] Step 4: Add 2 parts by mass of the film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is sorbitol.

[0125] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh filter sieve. The corrosion inhibitor used is benzothiazole.

[0126] Example 9:

[0127] A method for preparing a flux includes the following steps:

[0128] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0129] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0130] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0131] Step 4: Add 2 parts by weight of the film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the dropwise addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0132] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh filter sieve. The corrosion inhibitor is α-mercaptobenzothiazole.

[0133] Example 10:

[0134] A method for preparing a flux includes the following steps:

[0135] Step 1, preparation of activator: Stir organic acid and organic amine at room temperature until homogeneous, stir for 1 hour, filter through a 200-mesh sieve to obtain a 4% organic acid solution with a pH of 6, let stand for 1 hour to obtain the activator; wherein the organic amine is triethanolamine, the mass ratio between the organic acid and triethanolamine is 2:1, and the mass ratio between citric acid and succinic acid in the organic acid is 1:1.

[0136] Step 2: Add 2 parts by mass of activator to 92 parts by mass of modified volatile silicone oil by dropping it in. While adding the activator, stir the solution at 2500 rpm to make it evenly mixed. After the addition is completed, continue stirring for 1 hour and let it stand for 1 hour to obtain the first mixed solution. The modified volatile silicone oil is cyclodecamethylcyclopentasiloxane.

[0137] Step 3: Add 2 parts by mass of surfactant to the first mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the second mixed solution. The surfactant is hexadecyltrimethylammonium bromide.

[0138] Step 4: Add 2 parts by weight of the film-forming agent to the second mixed solution by dropping it dropwise while stirring the solution at 2500 rpm to ensure uniform mixing. After the dropwise addition is complete, continue stirring for 1 hour and let it stand for 1-2 hours to obtain the third mixed solution. The film-forming agent is polyethylene oxide.

[0139] Step 5: Add 2 parts by weight of the corrosion inhibitor to the third mixed solution dropwise, stirring the solution at 2500 rpm while adding the inhibitor to ensure uniform mixing. After the addition is complete, continue stirring for 1 hour, filter the solution, and let it stand for 2 hours to obtain the final product. The filtration process involves passing the solution through a 2000-mesh sieve. The corrosion inhibitor used is benzotriazole.

[0140] The fluxes obtained in the ten examples were subjected to performance tests, and the test results are shown in Table 1.

[0141] Table 1 shows the flux test results in the examples.

[0142]

[0143]

[0144] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high performance flux characterized in that, It includes the following components by mass percentage: Modified volatile silicone oil 90.0-94.0% Activator 2.0-4.0% Surfactant 2.0-4.0% Film-forming agent 1.0-3.0% Corrosion inhibitor 1.0-3.0%; The modified volatile silicone oil is a volatile silicone oil containing polyether segments.

2. The high performance flux according to claim 1, characterized in that, The modified volatile silicone oil includes modified cyclosiloxane polymers.

3. A high performance flux according to claim 2, wherein The modified cyclosiloxane polymer is one or a combination of two of modified cyclodecamethylcyclopentasiloxane and modified cyclododecylhexasiloxane.

4. The high performance flux according to claim 1, wherein The surfactant is one or a combination of two of hexadecyltrimethylammonium bromide and quaternary ammonium fluoroalkyl compounds.

5. The high performance flux according to claim 1, wherein The film-forming agent is one or a combination of two or more of the following: polyoxyethylene, polyvinyl alcohol, sorbitol, polyacrylamide, modified acrylic resin, and glyceryl stearate.

6. The high performance flux according to claim 1, wherein The corrosion inhibitor is one or a combination of two or more of benzothiazole, α-mercaptobenzothiazole, benzotriazole, benzimidazole and methylbenzimidazole.

7. The high performance flux according to claim 1, wherein The activator is a mixed solution comprising organic acids and organic amines.

8. A high performance flux according to claim 7, wherein The organic acid is one or a combination of two or more of lauric acid, citric acid, succinic acid, glutaric acid, and adipic acid.

9. A high performance flux according to claim 7, wherein The organic amine is one or a combination of two or more of dimethylamine, ethylamine, and triethanolamine.

10. A method of producing a high performance flux as claimed in any one of claims 1 to 9, characterised in that, Includes the following steps: In step S100, the activator is added to the modified volatile silicone oil in proportion by dripping, while stirring the solution to ensure uniform mixing; after the dripping is completed, stirring is continued, and then the mixture is allowed to stand to obtain the first mixed solution. In step S200, the surfactant is added to the first mixed solution in proportion by dropping it dropwise while stirring the solution to make it evenly mixed; after the dropwise addition is completed, stirring is continued, and then the solution is allowed to stand to obtain the second mixed solution. In step S300, the film-forming agent is added to the second mixed solution in proportion by dropping it dropwise while stirring the solution to make it evenly mixed; after the dropwise addition is completed, stirring is continued, and then the solution is allowed to stand to obtain the third mixed solution. In step S400, the corrosion inhibitor is added to the third mixed solution in proportion by dripping, while stirring the solution to ensure uniform mixing. After the dripping is completed, stirring continues, followed by filtration and standing to obtain the finished product.

Images