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Halogen-free flux preparation method

A flux and hydrogenated rosin technology, which is applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of the stability of halogen-free flux and poor fluxing performance, so that the color of rosin is not easy to deepen, and the stability and Good soldering performance and soldering quality

Inactive Publication Date: 2017-07-21
曾双
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem actually solved by the present invention is: to solve the problem of poor stability and soldering performance of the existing halogen-free flux, the key technical means adopted is to pass through the wettability of bis(triethanolamine) diisopropyl titanate The flux can be stored uniformly and stably, and the fluxing performance can be improved. The invention provides a preparation method of a halogen-free flux, and the prepared flux has excellent stability and fluxing performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing halogen-free flux, comprising the following steps:

[0022] (1) Weigh raw materials by weight: 10.0 parts of hydrogenated rosin, 2.0 parts of shikimic acid, 2.4 parts of maleic acid, 0.6 part of bis(triethanolamine) diisopropyl titanate, 1.8 parts of 5-hydroxysalicylic acid, 6.0 parts of castor oil, 86.0 parts of isopropanol, spare;

[0023] (2) Add hydrogenated rosin into the reaction kettle, melt at a temperature of 135°C, then add isopropanol and 5-hydroxysalicylic acid, keep the temperature at 115°C, and stir for 20 minutes;

[0024] (3) Add shikimic acid, maleic acid and bis(triethanolamine) diisopropyl titanate, stir for 20 minutes, cool the material to 65°C, finally add castor oil, stir for 25 minutes, and cool to room temperature to obtain the flux product .

Embodiment 2

[0026] A method for preparing halogen-free flux, comprising the following steps:

[0027] (1) Weigh raw materials by weight: 10.0 parts of hydrogenated rosin, 1.4 parts of shikimic acid, 1.5 parts of maleic acid, 1.2 parts of bis(triethanolamine) diisopropyl titanate, 1.0 part of 5-hydroxysalicylic acid, 3.8 parts of castor oil, 92.0 parts of isopropanol, spare;

[0028] (2) Add hydrogenated rosin into the reaction kettle, melt at a temperature of 125°C, then add isopropanol and 5-hydroxysalicylic acid, keep the temperature at 100°C, and stir for 15 minutes;

[0029] (3) Add shikimic acid, maleic acid and bis(triethanolamine) diisopropyl titanate, stir for 15 minutes, cool the material to 80°C, finally add castor oil, stir for 35 minutes, and cool to room temperature to obtain the flux product .

Embodiment 3

[0031] A method for preparing halogen-free flux, comprising the following steps:

[0032] (1) Weigh raw materials by weight: 10.0 parts of hydrogenated rosin, 1.7 parts of shikimic acid, 2.2 parts of maleic acid, 1.0 parts of bis(triethanolamine) diisopropyl titanate, 1.6 parts of 5-hydroxysalicylic acid, 5.5 parts of castor oil, 88.0 parts of isopropanol, spare;

[0033] (2) Add hydrogenated rosin into the reaction kettle, melt at a temperature of 140°C, then add isopropanol and 5-hydroxysalicylic acid, keep the temperature at 120°C, and stir for 18 minutes;

[0034] (3) Add shikimic acid, maleic acid and bis(triethanolamine) diisopropyl titanate, stir for 18 minutes, cool the material to 75°C, finally add castor oil, stir for 28 minutes, and cool to room temperature to obtain the flux product .

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Abstract

The invention discloses a halogen-free flux preparation method. The halogen-free flux preparation method comprises the following steps: firstly, hydrogenated rosin is added in a reaction kettle for melting at high temperature; then, isopropanol and 5-hydroxyl salicylic acid are added for continuous heating; then, shikimic acid, maleic acid and titanium bis(triethanolamine)diisopropoxide are added; materials are cooled to reach a certain temperature; and finally, castor oil is added for stirring by a period of time to cool to reach the room temperature so as to obtain a flux product. According to the halogen-free flux preparation method, the titanium bis(triethanolamine)diisopropoxide is added into an activating agent, namely the shikimic acid and the maleic acid; and the titanium bis(triethanolamine)diisopropoxide can improve the wettability of a halogen-free product, so that the defects caused by factors of a traditional halogen-free flux on the aspect of weldability in the production are reduced, and the stability and the welding assistance performance of the flux can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of soldering flux, and in particular relates to a preparation method of halogen-free soldering flux. Background technique [0002] The electronics industry needs to install a large number of electronic components on the printed circuit board by soldering. Good and reliable solder joint formation requires wetting, diffusion and metallurgical bonding of molten solder on very clean metal surfaces. However, the possibility of oxidation of printed circuit boards, electronic components, or other metal surfaces that are welded is almost 100% during manufacturing, storage, transportation, and reproduction. Therefore, the treatment of the oxide layer on the surface of the welding material is very critical in the production of the electronics industry. It is often necessary to use a large amount of flux chemicals to clean the oxide layer and pollutants on the metal surface to increase wetting, help and accelerate t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40B23K35/363
CPCB23K35/40B23K35/3612B23K35/362
Inventor 曾双
Owner 曾双
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