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Scaling powder and preparation method thereof

A flux and flux technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of high insulation resistance and low ion pollution of printed component boards, and achieve the effect of improving solderability and corrosion resistance

Active Publication Date: 2018-12-14
众潮电科(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When used for welding, there are few solid residues on the printed component board, the layout is clean, the ion pollution is low, no cleaning is required after welding, and the insulation resistance of the printed component board after welding is high, which can meet the no-cleaning requirements of the printed component board , but there is still room for further improvement in the performance of the flux

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of soldering flux in parts by weight, including the following raw materials: 4 parts of stannous oxalate, 15 parts of organic acid activators, 0.5 parts of surfactants, 2 parts of flux, 5 parts of hydroxyethyl cellulose, polyphosphoric acid 3 parts of sodium, 2 parts of lactic acid, 70 parts of solvent.

[0030] The organic acid activator is succinic acid. Described auxiliary solvent is ethylene glycol monobutyl ether. Described surfactant is OP-5. Described solvent is ethanol.

[0031]A preparation method according to the above flux, comprising the following steps: (1) adding stannous oxalate, hydroxyethyl cellulose, lactic acid and sodium polyphosphate into a solvent, after fully mixing, adding a flux; (2) After fully dissolving, add organic acid activator and surfactant, and stir for 45 minutes.

Embodiment 2

[0033] A kind of soldering flux in parts by weight, including the following raw materials: 3 parts of stannous oxalate, 20 parts of organic acid activator, 0.1 part of surfactant, 3 parts of flux, 4 parts of hydroxyethyl cellulose, polyphosphoric acid 4 parts of sodium, 1 part of lactic acid, and 80 parts of solvent.

[0034] The organic acid activator is methylsuccinic acid. Described auxiliary solvent is propylene glycol monomethyl ether. Described surfactant is OP-7. Described solvent is Virahol.

[0035] A preparation method according to the above flux, comprising the following steps: (1) adding stannous oxalate, hydroxyethyl cellulose, lactic acid and sodium polyphosphate into a solvent, after fully mixing, adding a flux; (2) After fully dissolving, add organic acid activator and surfactant, and stir for 30 minutes.

Embodiment 3

[0037] A kind of soldering flux in parts by weight, including the following raw materials: 5 parts of stannous oxalate, 10 parts of organic acid activators, 1 part of surfactant, 1 part of flux, 6 parts of hydroxyethyl cellulose, polyphosphoric acid 2 parts of sodium, 3 parts of lactic acid, 60 parts of solvent.

[0038] The organic acid activator is succinic anhydride. Described auxiliary solvent is diethylene glycol dimethyl ether. Described surfactant is OP-10. Described solvent is methanol.

[0039] A preparation method according to the above flux, comprising the following steps: (1) adding stannous oxalate, hydroxyethyl cellulose, lactic acid and sodium polyphosphate into a solvent, after fully mixing, adding a flux; (2) After fully dissolving, add organic acid activator and surfactant, and stir for 60 minutes.

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PUM

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Abstract

The invention discloses scaling powder and a preparation method thereof, and belongs to the technical field of welding. The scaling powder comprises the raw materials of stannous oxalate, organic acidtype activating agents, surface active agents, cosolvent, solvents, hydroxyethyl celluloses, lactic acid and sodium polyphosphate. The preparation method of the scaling powder comprises the steps ofmixing, dissolving and the like. The hydroxyethyl celluloses, the sodium polyphosphate and the lactic acid are adopted as reinforcing systems, so that the weldability and the corrosion resistance of the scaling powder are improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a flux and a preparation method thereof. Background technique [0002] Flux is the key material to ensure the quality of welding. It should not only have high flux, but also not corrode the material to be welded. At the same time, it must meet a series of mechanical and electrical properties, especially reliability requirements. Therefore, , The quality of flux directly affects the quality of welding products. [0003] In the soldering process, because some halogen-containing chemical substances have excellent soldering activity and low cost advantages, most of the currently used fluxes are composed of rosin, resins, and halide-containing activators. This type of flux can be used Good solderability and low cost, but if the electronic products after welding continue to retain the activity of halogen-containing chemicals, the ion pollution will exceed the standard, and then chron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
CPCB23K35/3612B23K35/362
Inventor 不公告发明人
Owner 众潮电科(深圳)有限公司
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