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Soldering flux and preparation method thereof

A flux and wetting agent technology, which is applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems that affect the service life of copper-aluminum composite pipe, reduce the tensile strength of the weld, affect the appearance of the product, and damage the reliability, etc., to achieve Improve welding effect, strong manufacturability, and good air tightness

Inactive Publication Date: 2011-03-09
LICHUANG TAISHAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two compounds will affect the life of the copper-aluminum composite pipe and reduce the tensile strength of the weld, and also affect the overall appearance of the product
Nowadays, benzotriazole is generally introduced into the flux to prevent the production of copper metal soap and it is difficult to have a green phenomenon, but the addition of benzotriazole will reduce the wettability, so this is added to the solder flux When using similar substances, it is necessary to add active active agents, which will damage its reliability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition of the flux is by weight percentage, respectively:

[0026] Water White Hydrogenated Rosin 96.39%

[0027] Polyacrylic resin 0.15%

[0028] Malonic acid 0.4%

[0029] Adipic acid 1.0%

[0030] Cyclohexylamine hydrochloride 1.6%

[0031] Dibromoethylbenzene 0.3%

[0032] FC-135 0.1%

[0033] Tetrazole 0.06%

[0034] Preparation:

[0035] Accurately weigh the reagents and rosin required for the above-mentioned flux according to the requirements of the flux formula ratio, add the compounded rosin in proportion to the reaction kettle with heating function, heat to 110°C, and mix it evenly; slowly Raise the temperature to 140°C, add organic acid activator, wetting agent, surfactant and corrosion inhibitor in proportion at this temperature, and stir for 0.5h; pour the prepared flux into the tin wire with heat preservation function and extrude machine rosin barrels to obtain finished products.

Embodiment 2

[0037] The composition of the flux is by weight percentage, respectively:

[0038] Water White Hydrogenated Rosin 70%

[0039] Dipolymerized Rosin 25.1%

[0040] Malonic acid 0.6%

[0041] Glutaric acid 1.0%

[0042] Dibromoethylamine hydrobromide 1.8%

[0043] FSN-100 0.5%

[0044] Ethylene Glycol Benzazole 0.1%

[0045] Preparation:

[0046]Accurately weigh the reagents and rosin required for the above-mentioned flux according to the requirements of the flux formula ratio, add the compounded rosin in proportion to the reaction kettle with heating function, heat to 110°C, and mix it evenly; slowly Raise the temperature to 140°C, add organic acid activator, wetting agent, surfactant and corrosion inhibitor in proportion at this temperature, and stir for 0.5h; pour the prepared flux into the tin wire with heat preservation function and extrude machine rosin barrels to obtain finished products.

Embodiment 3

[0048] The composition of the flux is by weight percentage, respectively:

[0049] Water White Hydrogenated Rosin 50%

[0050] Dipolymer Rosin 30%

[0051] Disproportionated Rosin 17.04%

[0052] Malonic acid 0.3%

[0053] Succinic Acid 0.6%

[0054] Glutaric acid 1.0%

[0055] Aniline 0.6%

[0056] Diethanolamine 0.2%

[0057] OP-6 0.2%

[0058] Tetrazole 0.06%

[0059] Preparation:

[0060] Accurately weigh the reagents and rosin required for the above-mentioned flux according to the requirements of the flux formula ratio, add the compounded rosin in proportion to the reaction kettle with heating function, heat to 110°C, and mix it evenly; slowly Raise the temperature to 140°C, add organic acid activator, wetting agent, surfactant and corrosion inhibitor in proportion at this temperature, and stir for 0.5h; pour the prepared flux into the tin wire with heat preservation function and extrude machine rosin barrels to obtain finished products.

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Abstract

The invention discloses a soldering flux, prepared by the following components by weight percent: 0.1-3% of organic acid activator, 0.01-2% of surfactant, 1-4% of wetting agent, 0.01-0.1% of corrosion inhibitor and 90.9-98.88% of film-forming agent. The preparation method thereof includes: (1) in weight percent, organic acid activator, surfactant, wetting agent, corrosion inhibitor and film-forming agent are accurately weighed; (2) the film-forming agent is added into a kettle with heating function and is heated to 110 DEG C, and mixing to be uniform is carried out; (3) slaw warming to 140 DEG C is carried out, the organic acid activator, surfactant, wetting agent and corrosion inhibitor are added once in ratio at 140 DEG C, and stirring is carried out for 0.5h; (4) cooling is carried out, thus obtaining the soldering flux finished product. The invention is mainly used in air conditioning and refrigeration industries, and the soldering flux can cause a welding ring to completely meet the welding requirement of the existing copper aluminium composite tube.

Description

technical field [0001] The invention relates to the field of flux technology, in particular to a flux used for welding environment-friendly welding rings of high-efficiency energy-saving copper-aluminum composite pipes used in air-conditioning and refrigeration industries and a preparation method thereof. Background technique [0002] With the advent of the copper-aluminum composite pipe, its welding process has also undergone tremendous changes. The biggest change is the replacement of the copper-phosphorus welding ring with a higher melting point with the soldering ring. The soldering ring has its own flux and the welding process is simple. A simple welding ring cannot meet the welding requirements of the copper-aluminum composite pipe, because the surface of the copper will be gradually oxidized when it is in contact with the air for a long time. Therefore, only the welding ring and the copper-aluminum composite pipe and its components are heated. And difficult to weld. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
Inventor 梁力强锡坚梁洁明范晶波
Owner LICHUANG TAISHAN ELECTRONICS TECH
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