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Water-based soldering flux capable of reducing discharge of tin soldering pollutants

A pollutant emission and flux technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of pollutant emission, improve the drying speed, ensure the level of residue flow on the welding surface, and increase the welding efficiency. The effect of point light brightness

Active Publication Date: 2015-04-15
广东中实金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is just to solve the problem of pollutant discharge in tin welding, and to provide a water-based flux that can reduce the discharge of tin welding pollutants, thereby reducing pollution discharge to air pollution and reducing the number of operators. health hazards, to achieve low-carbon electronic soldering materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take the hydrogenated rosin AR-120H 1.0g with a softening point of 120℃ and an acid value of 230±5mgKOH / g, 0.19g of FT900, 0.23g of cetylpyridinium bromide and 0.58g of Tween-80 to compound nonionic surface activity 1.0g, SAF-25 polyoxyalkylene glycol 1.20g, 1.2 propylene glycol 1.8g and diethylene glycol 1.5g compound high boiling point polyol solvent 4.5g, itaconic acid 0.08g, malic acid 0.64 g, 0.08g of glutaric acid, 0.8g of organic acid, 16.7g of ethanol and 8.3g of isopropanol, 25.0g of organic solvent and 67.7g of deionized water;

[0033] Crush the above 1.0g hydrogenated rosin AR-120 H to a lump with a diameter of less than 1cm and add 25.0g of the compound organic solvent into the reaction kettle and heat to 60°C and stir for 2 hours until all is dissolved, then add the compound nonionic surfactant in sequence 1.0g, compounded with 4.5g of high-boiling polyol solvent, compounded with organic acid 0.8g, continue to stir for 1 hour to dissolve, then add 67.7g of de...

Embodiment 2

[0035] Take the hydrogenated rosin AR-120 H 5.0g with a softening point of 120℃ and an acid value of 230±5mgKOH / g, 0.32g of FT900, 0.39g of cetylpyridinium bromide and 0.79g of Tween-80 to compound a non-ionic surface Active agent 1.5g, SAF-25 polyoxyalkylene glycol 0.58g, 1.2 propylene glycol 0.71g and diethylene glycol 0.71g compounded with high boiling point polyol solvent 2.0g, itaconic acid 0.394g, malic acid 2.37g and 0.236g of glutaric acid are combined with 3.0g of organic acid, 22.5g of ethanol and 7.5g of isopropanol, 30.0g of organic solvent and 58.5g of deionized water;

[0036] Crush the above 5.0g hydrogenated rosin AR-120H to a lump with a diameter of less than 1cm and add 30.0g of the compound organic solvent to the reaction kettle and heat to 65°C and stir for 2 hours until all is dissolved, then add compound nonionic surfactant 1.5 in sequence g. Compound 2.0g of high-boiling polyol solvent, compounded with organic acid 3.0g, continue to stir for 1 hour to disso...

Embodiment 3

[0038] Take the hydrogenated rosin AR-120 H 2.8g with a softening point of 120℃ and an acid value of 230±5mgKOH / g, 0.12g of FT900, 0.14g of cetylpyridinium bromide and 0.24g of Tween-80 to compound a non-ionic surface Active agent 0.5g, SAF-25 polyoxyalkylene glycol 1.88g, 1.2 propylene glycol 1.88g and diethylene glycol 2.24g compounded high boiling point polyol solvent 6.0g, itaconic acid 0.078g, malic acid 0.39g and 0.032g of glutaric acid are combined with 0.5g of organic acid, 21.75g ​​of ethanol and 7.25g of isopropanol, 29.0g of organic solvent and 61.2g of deionized water;

[0039] Crush the above 2.8g of hydrogenated rosin AR-120 H to a lump with a diameter of less than 1cm and add 29.0g of the compound organic solvent into the reaction kettle and heat to 60℃ and stir for 2 hours until all is dissolved, and then add the compound nonionic surfactant in sequence 0.5g, compounded with 6.0g of high-boiling polyol solvent, compounded with organic acid 0.5g, continue to stir f...

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PUM

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Abstract

The invention relates to water-based soldering flux capable of reducing discharge of tin soldering pollutants. The water-based soldering flux is characterized in that the water-based soldering flux is composed of hydrogenated rosin AR-120H, mixed surfactant, mixed high-boiling-point polyhydric alcohol solvent, mixed organic acid, mixed organic solvent and deionized water and prepared by smashing 1.0-5.0% of hydrogenated rosin into blocks, adding together with 25.0-30.0% of mixed organic solvent into a reaction kettle, heating while stirring until being completely dissolved, sequentially adding 0.5-1.5% of mixed surfactant, 2.0-6.0% of mixed high-boiling-point polyhydric alcohol solvent and 0.5-3.0% of mixed organic acid, continuing to stir until being completely dissolved, adding into the rest deionized water, stirring before standing, and filtering to obtain the water-based soldering flux. The water-based soldering flux has the advantages that halogen-free standard requirements are met, pollutant discharge is reduced, air pollution is reduced, damages to health are reduced, emission of organic matters like VOC (volatile organic compounds) and CO2 is reduced, most of the solvent are volatilized, and effluent is steam.

Description

Technical field [0001] The invention relates to a water-based flux that can reduce the discharge of tin welding pollutants, and belongs to the field of electronic welding materials. Background technique [0002] Existing soldering flux, due to the high solid content of the flux and halogen and other organics, it generates smoke during soldering, especially the resin used in the flux has low softening point, low acid value and low solvent boiling point, 250-350 ℃ welding temperature produces larger smoke, VOC and CO 2 Emissions not only pollute the environment, but also harm people’s health. At present, the National Development and Reform Commission has launched pilot projects for low-carbon living and low-carbon cities in many provinces and cities. Organic emissions from soldering and cleaning of electronic information products are the main source of pollution in the electronics industry. Therefore, the development of low-carbon electronic welding materials is urgent. Summary of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/363
Inventor 杨嘉骥方喜波孙玉欣孟昭辉梁静珊孙淼何淑芳
Owner 广东中实金属有限公司