Water-soluble flux using rosin as carrier and preparation method thereof
A water-soluble, flux-based technology, applied in the direction of welding equipment, welding media, manufacturing tools, etc., can solve the problems of poor dryness of printed boards, unfavorable on-line inspection, low insulation resistance, etc., and achieve good dryness, easy cleaning, The effect of high surface insulation resistance
Inactive Publication Date: 2012-12-05
杨嘉骥
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Problems solved by technology
[0003] Most of the solvents used in commonly used liquid fluxes are organic solvents, which are directly discharged into the atmosphere during welding, causing air pollution. With the increasing restrictions on the emission of volatile organic compounds (VOC) in the world, The status of water-soluble flux will become more and more important. In recent years, water-soluble flux has been widely used in domestic and foreign electronics industries, but generally water-soluble flux uses glycerin and polyethylene glycol as carriers, and the surface insulation after soldering The resistance is low and the dryness of the printed board is poor, which is not conducive to online inspection. At the same time, the evaporation heat generated by the water of water-soluble flux is much larger than that of organic solvents during the welding process, so welding defects such as continuous welding are easy to occur
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Embodiment 1
[0019] First, add 18kg of ethanol into a container with a stirrer, then add 3kg of acrylic rosin, 1.5kg of Tween 20, 2.0kg of malic acid, and 0.3kg of dimethylamine hydrochloride. After all are dissolved, drop Add 4kg of ethanolamine to PH=9, add the remaining amount of deionized water, stir at a high speed of 3000 rpm for 10 minutes, and filter to obtain the product.
Embodiment 2
[0021] First add 19kg of ethanol into a container with a stirrer, followed by adding 5kg of acrylic rosin, 1.2kg of Tween 20, 1.5kg of malic acid, and 0.2kg of dimethylamine hydrochloride. 7kg of ethanolamine to PH = 9, add the remaining amount of deionized water, stir at 3000 rpm for 10 minutes, and filter to obtain the product.
Embodiment 3
[0023] First add 20kg of ethanol into a container with a stirrer, then add 8kg of acrylic rosin, 0.8kg of Tween 20, 1.8kg of malic acid, and 0.1kg of dimethylamine hydrochloride in turn, and after all of them are dissolved, Add 9kg of ethanolamine dropwise to pH=9, add the remaining amount of deionized water, stir at 3000 rpm for 10 minutes, and filter to obtain the product.
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The invention relates to a water soluble flux soldering taking colophony as a carrier and a method for preparing the same. The method is characterized by using acrylic colophony, ethanol, Tween 20, malic acid, dimethylamine hydrochloride, ethanol amine and the balance deionized water as raw materials; adding ethanol into a container of a stirrer first; sequentially adding the acrylic colophony, the Tween 20, the malic acid and the dimethylamine hydrochloride; after complete dissolution of the raw materials, dropping the ethanol amine till the PH value reaches 9; adding the balance deionized water; stirring the mixture at a high speed of 3,000 r / min for 10 minutes; and obtaining the product of water soluble flux soldering by filtration. The product has the advantages that: the welded surfaces are insulated and have high resistance; a printed board has good dryness and is easy to clean; and the cost is low and the preparation method is simple.
Description
technical field [0001] The invention relates to a water-soluble soldering flux with rosin as a carrier, belonging to the technical field of electronic soldering materials. [0002] The invention also relates to a preparation method of the water-soluble flux. Background technique [0003] Most of the solvents used in commonly used liquid fluxes are organic solvents, which are directly discharged into the atmosphere during welding, causing air pollution. With the increasing restrictions on the emission of volatile organic compounds (VOC) in the world, The status of water-soluble flux will become more and more important. In recent years, water-soluble flux has been widely used in domestic and foreign electronics industries, but generally water-soluble flux uses glycerin and polyethylene glycol as carriers, and the surface insulation after soldering The resistance is low and the dryness of the printed board is poor, which is not conducive to on-line inspection. At the same time...
Claims
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IPC IPC(8): B23K35/36
Inventor 杨嘉骥严素荣朱炳忠刘密新冯惠生孙淼何淑芳卢琼安宁
Owner 杨嘉骥