CN108326471B - Additive for soldering flux - Google Patents
Additive for soldering flux Download PDFInfo
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- CN108326471B CN108326471B CN201711306674.4A CN201711306674A CN108326471B CN 108326471 B CN108326471 B CN 108326471B CN 201711306674 A CN201711306674 A CN 201711306674A CN 108326471 B CN108326471 B CN 108326471B
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- soldering flux
- flux
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
Abstract
The invention relates to the technical field of welding materials, and discloses an additive for soldering flux, which comprises the following components in parts by weight: 40-45 parts of polyethyleneimine, 15-20 parts of zinc borate, 17-19 parts of polymetaphosphoric acid, 13-15 parts of dialkyl p-phenylenediamine, 10-12 parts of 2, 6-di-tert-butyl-4-cresol, 8.0-9.0 parts of calcium carbonate, 5.5-6.5 parts of dibutyltin dilaurate, 4.0-5.0 parts of calcium stearate, 3.5-4.5 parts of zinc palmitate, 2.5-3.0 parts of aluminum hydroxide, 2.0-2.5 parts of magnesium hydroxide, 1.5-2.0 parts of antimony oxide, 0.8-1.0 part of N, N-di-N-butyl nickel dithiocarbamate and 0.3-0.5 part of nano zinc oxide, and the soldering flux is added with small dosage but strong pertinence, and can play a greater role by utilizing the special physical and chemical properties of the soldering flux.
Description
Technical Field
The invention belongs to the technical field of welding materials, and particularly relates to an additive for a soldering flux.
Background
The soldering is the main technological process in electronic assembly, the soldering flux is the auxiliary material used in soldering, and the main function of the soldering flux is to remove the oxides on the surfaces of the solder and the soldered parent metal, so that the necessary cleanness of the metal surface is achieved. It can prevent surface from being oxidized again during welding, reduce surface tension of solder and raise welding performance. The soldering flux is an organic mixture with comprehensive functions, is the most important auxiliary material in a welding material, directly influences the quality and reliability of an electronic product in an electronic assembly process, and has higher and higher requirements on the soldering flux and good and bad performance of the soldering flux due to the rapid development of modern information and electronic industry and the continuous improvement of electronic precision.
The flux has more components, wherein the main functions are an active agent and a surfactant, besides, the dosage of the functional additive is less, but the flux can exert greater efficacy by utilizing the special physical and chemical properties of the flux, and people often neglect the influence of the flux.
Disclosure of Invention
The invention aims to solve the existing problems and provides an additive for soldering flux, which has low consumption and strong pertinence and can enable the soldering flux to exert greater efficacy by utilizing the special physical and chemical properties of the additive.
The invention is realized by the following technical scheme:
an additive for soldering flux comprises the following components in parts by weight: 40-45 parts of polyethyleneimine, 15-20 parts of zinc borate, 17-19 parts of polymetaphosphoric acid, 13-15 parts of dialkyl p-phenylenediamine, 10-12 parts of 2, 6-di-tert-butyl-4-cresol, 8.0-9.0 parts of calcium carbonate, 5.5-6.5 parts of dibutyltin dilaurate, 4.0-5.0 parts of calcium stearate, 3.5-4.5 parts of zinc palmitate, 2.5-3.0 parts of aluminum hydroxide, 2.0-2.5 parts of magnesium hydroxide, 1.5-2.0 parts of antimony oxide, 0.8-1.0 part of N, N-di-N-butyl nickel dithiocarbamate and 0.3-0.5 part of nano zinc oxide.
As a further description of the above scheme, the particle size of the aluminum hydroxide, magnesium hydroxide and antimony oxide is in the range of 0.015-0.020 microns.
As a further description of the above scheme, the mass percentage of the additive in the soldering flux is 0.25-0.35%.
As a further description of the above scheme, the preparation method of the nano zinc oxide comprises the following steps:
(1) slowly dropwise adding a sodium hydroxide solution with the mass concentration of 0.4-0.6 mol/L into zinc nitrate crystal powder at 260-300 r/min, continuously stirring for 15-20 min under a magnetic stirrer according to the addition amount until the pH value of the solution reaches 8.0-8.2, and then adding deionized water accounting for 30-40% of the volume fraction of the system for ultrasonic dispersion for 10-15 min to obtain a solid-liquid mixture;
(2) continuously stirring the solid-liquid mixture subjected to ultrasonic dispersion for 15-18 minutes, transferring the mixture into a hydrothermal reaction kettle, reacting for 16-18 hours at 180-200 ℃, taking out the reaction kettle, placing the reaction kettle in a fume hood, naturally cooling to room temperature, removing the product, washing the product for 3-5 times with ethanol and deionized water respectively to obtain a product, placing the product in a drying oven at 60-70 ℃ for drying for 4-6 hours, and then placing the product in a muffle furnace for calcining for 1-2 hours to obtain the nano zinc oxide with the particle size of 50-80 nanometers.
Compared with the prior art, the invention has the following advantages: in order to improve the efficacy of the soldering flux, the invention provides the additive for the soldering flux, the added amine organic matters can carry out complex reaction with the solder at normal temperature, and the generated hydrophobic film covers the surface of the welded object, so that the occurrence of corrosion can be effectively inhibited, and the formation of metal oxides can be inhibited; the antimony oxide which is singly used as a flame retardant has poor effect, is micronized and has excellent flame retardant effect under the synergistic action of the antimony oxide, the aluminum hydroxide and the magnesium hydroxide, the hidden danger of fire in the welding process is reduced, and no harmful gas is generated; the metal soap system is used as a stabilizer, so that the heat resistance is good, the lubricating effect is realized, the wettability of the soldering flux can be improved, the wetting time is shortened, the maximum wetting force is improved, the residues are few, and the stability of the surface insulation resistance is not influenced; the added nano zinc oxide has weather resistance, light resistance and ultraviolet absorptivity, good thermal stability, smoke suppression and extinction function, and can overcome eye fatigue during operation and inspection; the additive has low consumption and strong pertinence, and can make the soldering flux play a greater role by utilizing the special physical and chemical properties of the additive.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example 1
An additive for soldering flux comprises the following components in parts by weight: 40 parts of polyethyleneimine, 15 parts of zinc borate, 17 parts of polymetaphosphoric acid, 13 parts of dialkyl p-phenylenediamine, 10 parts of 2, 6-di-tert-butyl-4-cresol, 8.0 parts of calcium carbonate, 5.5 parts of dibutyltin dilaurate, 4.0 parts of calcium stearate, 3.5 parts of zinc palmitate, 2.5 parts of aluminum hydroxide, 2.0 parts of magnesium hydroxide, 1.5 parts of antimony oxide, 0.8 part of N, N-di-N-butyl nickel dithiocarbamate and 0.3 part of nano zinc oxide.
As a further description of the above scheme, the particle size of the aluminum hydroxide, magnesium hydroxide and antimony oxide is in the range of 0.015-0.020 microns.
As a further description of the above scheme, the mass percentage of the additive in the flux is 0.25%.
As a further description of the above scheme, the preparation method of the nano zinc oxide comprises the following steps:
(1) slowly dropwise adding a sodium hydroxide solution with the mass concentration of 0.4 mol/L into zinc nitrate crystal powder at 260 revolutions per minute, continuously stirring for 15 minutes under a magnetic stirrer with the addition amount based on the pH value of the solution reaching 8.0, and then adding deionized water accounting for 30% of the volume fraction of the system for ultrasonic dispersion for 10 minutes to obtain a solid-liquid mixture;
(2) continuously stirring the solid-liquid mixture subjected to ultrasonic dispersion for 15 minutes, transferring the mixture into a hydrothermal reaction kettle, reacting for 16 hours at 180 ℃, taking out the reaction kettle, placing the reaction kettle in a fume hood, naturally cooling to room temperature, removing a product, washing the product for 3 times by using ethanol and deionized water respectively to obtain a product, placing the product in a 60 ℃ drying oven, drying for 4 hours, and then placing the product in a muffle furnace to calcine for 1 hour to obtain the nano zinc oxide with the particle size of 50-80 nanometers.
Example 2
An additive for soldering flux comprises the following components in parts by weight: 42 parts of polyethyleneimine, 18 parts of zinc borate, 18 parts of polymetaphosphoric acid, 14 parts of dialkyl p-phenylenediamine, 11 parts of 2, 6-di-tert-butyl-4-cresol, 8.5 parts of calcium carbonate, 6.0 parts of dibutyltin dilaurate, 4.5 parts of calcium stearate, 4.0 parts of zinc palmitate, 2.8 parts of aluminum hydroxide, 2.3 parts of magnesium hydroxide, 1.8 parts of antimony oxide, 0.9 part of N, N-di-N-butyl nickel dithiocarbamate and 0.4 part of nano zinc oxide.
As a further description of the above scheme, the particle size of the aluminum hydroxide, magnesium hydroxide and antimony oxide is in the range of 0.015-0.020 microns.
As a further description of the above scheme, the mass percentage of the additive in the flux is 0.30%.
As a further description of the above scheme, the preparation method of the nano zinc oxide comprises the following steps:
(1) slowly dropwise adding a sodium hydroxide solution with the mass concentration of 0.5 mol/L into zinc nitrate crystal powder at 280 revolutions per minute, continuously stirring for 18 minutes under a magnetic stirrer with the addition amount based on the pH value of the solution reaching 8.1, and then adding deionized water accounting for 35 percent of the volume fraction of the system for ultrasonic dispersion for 12 minutes to obtain a solid-liquid mixture;
(2) continuously stirring the solid-liquid mixture subjected to ultrasonic dispersion for 17 minutes, transferring the mixture into a hydrothermal reaction kettle, reacting for 17 hours at 190 ℃, taking out the reaction kettle, placing the reaction kettle in a fume hood, naturally cooling to room temperature, removing a product, washing the product with ethanol and deionized water for 4 times respectively to obtain a product, placing the product in a 65 ℃ oven, drying for 5 hours, and then placing the product in a muffle furnace to calcine for 1.5 hours to obtain the nano zinc oxide with the particle size of 50-80 nanometers.
Example 3
An additive for soldering flux comprises the following components in parts by weight: 45 parts of polyethyleneimine, 20 parts of zinc borate, 19 parts of polymetaphosphoric acid, 15 parts of dialkyl p-phenylenediamine, 12 parts of 2, 6-di-tert-butyl-4-cresol, 9.0 parts of calcium carbonate, 6.5 parts of dibutyltin dilaurate, 5.0 parts of calcium stearate, 4.5 parts of zinc palmitate, 3.0 parts of aluminum hydroxide, 2.5 parts of magnesium hydroxide, 2.0 parts of antimony oxide, 1.0 part of N, N-di-N-butyl nickel dithiocarbamate and 0.5 part of nano zinc oxide.
As a further description of the above scheme, the particle size of the aluminum hydroxide, magnesium hydroxide and antimony oxide is in the range of 0.015-0.020 microns.
As a further description of the above scheme, the mass percentage of the additive in the flux is 0.35%.
As a further description of the above scheme, the preparation method of the nano zinc oxide comprises the following steps:
(1) slowly dropwise adding a sodium hydroxide solution with the mass concentration of 0.6 mol/L into zinc nitrate crystal powder at 300 r/min, continuously stirring for 20 min under a magnetic stirrer with the addition amount based on the pH value of the solution reaching 8.2, and adding deionized water accounting for 40% of the volume fraction of the system for ultrasonic dispersion for 15 min to obtain a solid-liquid mixture;
(2) continuously stirring the solid-liquid mixture subjected to ultrasonic dispersion for 18 minutes, transferring the mixture into a hydrothermal reaction kettle, reacting for 18 hours at 200 ℃, taking out the reaction kettle, placing the reaction kettle in a fume hood, naturally cooling to room temperature, removing a product, washing the product with ethanol and deionized water for 5 times respectively to obtain a product, placing the product in a 70 ℃ drying oven, drying for 6 hours, and then placing the product in a muffle furnace to calcine for 2 hours to obtain the nano zinc oxide with the particle size of 50-80 nanometers.
Comparative example 1
The only difference from example 1 is that the polyethyleneimine, dialkyl p-phenylenediamine, in the formulation was omitted and the rest remained the same.
Comparative example 2
The only difference from example 2 is that the aluminum hydroxide and magnesium hydroxide in the formulation are omitted and the rest remains unchanged.
Example 3
The only difference from example 3 is that the nano zinc oxide was removed and the metallic lead system was used as an antioxidant component instead of the metallic soap system in the formulation, and the rest remained the same.
Comparative test
The method of examples 1-3 and comparative examples 1-3 were used to prepare the additive for the flux, and meanwhile, the existing commonly used flux additive was used as a control, a solder wire was used as a flux, the same rosin flux was used, and each group of additives was matched to solder the copper sheet, keeping the independent variables consistent, and the soldering performance was recorded as shown in the following table:
the following tests show that: the soldering flux additive disclosed by the invention is low in dosage and strong in pertinence, and can enable the soldering flux to exert greater effects by utilizing the special physical and chemical properties of the soldering flux additive.
Claims (4)
1. The additive for the soldering flux is characterized by comprising the following components in parts by weight: 40-45 parts of polyethyleneimine, 15-20 parts of zinc borate, 17-19 parts of polymetaphosphoric acid, 13-15 parts of dialkyl p-phenylenediamine, 10-12 parts of 2, 6-di-tert-butyl-4-cresol, 8.0-9.0 parts of calcium carbonate, 5.5-6.5 parts of dibutyltin dilaurate, 4.0-5.0 parts of calcium stearate, 3.5-4.5 parts of zinc palmitate, 2.5-3.0 parts of aluminum hydroxide, 2.0-2.5 parts of magnesium hydroxide, 1.5-2.0 parts of antimony oxide, 0.8-1.0 part of N, N-di-N-butyl dithiocarbamic acid nickel and 0.3-0.5 part of nano zinc oxide.
2. The additive for flux according to claim 1, wherein the particle sizes of the aluminum hydroxide, the magnesium hydroxide and the antimony oxide are in the range of 0.015 to 0.020 μm.
3. The additive for soldering flux according to claim 1, wherein the mass percentage of the additive in the soldering flux is 0.25-0.35%.
4. The additive for flux according to claim 1, wherein the preparation method of the nano zinc oxide comprises the following steps:
(1) slowly and dropwise adding a sodium hydroxide solution with the mass concentration of 0.4-0.6 mol/L into zinc nitrate crystal powder at 260-300 r/min, continuously stirring for 15-20 min under a magnetic stirrer according to the addition amount until the pH value of the solution reaches 8.0-8.2, and then adding deionized water accounting for 30-40% of the volume fraction of the system for ultrasonic dispersion for 10-15 min to obtain a solid-liquid mixture;
(2) continuously stirring the solid-liquid mixture subjected to ultrasonic dispersion for 15-18 minutes, transferring the mixture into a hydrothermal reaction kettle, reacting for 16-18 hours at 180-200 ℃, taking out the reaction kettle, placing the reaction kettle in a fume hood, naturally cooling to room temperature, removing the product, washing the product for 3-5 times with ethanol and deionized water respectively to obtain a product, placing the product in a drying oven at 60-70 ℃ for drying for 4-6 hours, and then placing the product in a muffle furnace for calcining for 1-2 hours to obtain the nano zinc oxide with the particle size of 50-80 nanometers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711306674.4A CN108326471B (en) | 2017-12-11 | 2017-12-11 | Additive for soldering flux |
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| CN201711306674.4A CN108326471B (en) | 2017-12-11 | 2017-12-11 | Additive for soldering flux |
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| CN108326471B true CN108326471B (en) | 2020-11-20 |
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| CN112475663B (en) * | 2020-11-17 | 2022-05-10 | 云南锡业锡材有限公司 | Preparation method of lead-free composite soldering paste with high spreading rate |
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| CN102146563B (en) * | 2011-03-08 | 2013-01-30 | 张昆 | Production process for intelligent temperature adjusting steel rail with laser cladding layer and heat insulation coating |
| KR101166790B1 (en) * | 2012-02-07 | 2012-07-26 | 아이에스피(주) | Manufacturing process of sn or sac nano solder paste with low melting temperature and the solder paste manufactured by the method |
| CN103706967B (en) * | 2013-12-20 | 2016-06-15 | 王洪亮 | A kind of welding compound and welding method |
| CN104002061B (en) * | 2014-05-21 | 2015-12-02 | 广州柏仕达新材料有限公司 | A kind of high-performance high stable nanometer solder(ing) paste and preparation method thereof |
| CN106041367A (en) * | 2016-07-14 | 2016-10-26 | 四川美亚达光电科技有限公司 | Soldering flux for light-emitting diode |
| CN107033588A (en) * | 2017-05-17 | 2017-08-11 | 江苏金发科技新材料有限公司 | Laser welding is modified light-coloured polyamide composite with flat fiber |
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Effective date of registration: 20201102 Address after: 236300 Anhui city of Fuyang province Funan County Economic Development Zone Applicant after: ANHUI XINDA HOUSEHOLD Co.,Ltd. Address before: 242500 Wei five road, Jingchuan Town Economic Development Zone, Jingxian County, Xuancheng, Anhui. Applicant before: ANHUI BAOCHEN ELECTROMECHANICAL EQUIPMENT TECHNOLOGY Co.,Ltd. |
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