Scaling powder for lead-free solder wire

A lead-free solder and flux technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve problems such as residues and smoke generation, and achieve low damage, easy cleaning, and good wetting performance. Effect

Inactive Publication Date: 2013-06-05
郴州金箭焊料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of smoke and residues in lead-free solder wire welding, the invention provides a flux for lead-free solder wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The composition and mass percentage distribution of flux are as follows:

[0030] Water white rosin 8 wt%, polymerized rosin 25 wt%, glutaric acid 2 wt%, stearic acid 6 wt%, lauric acid 3 wt%, tetrabutylammonium bromide 0.5wt%, polyethylene glycol 8wt% , 0.8wt% nonylphenol polyoxyethylene ether, 0.5wt% benzotriazole, and the balance solvent.

Embodiment 2

[0032] The composition and mass percentage distribution of flux are as follows:

[0033] Disproportionated rosin 15 wt%, hydrogenated rosin 20 wt%, octadecanoic acid 6wt%, stearic acid 4 wt%, cyclohexylamine hydrobromide 0.4wt%, polyethylene glycol 8wt%, dimethyl succinate 0.8 wt%, benzothiazole 0.6wt%, the balance of solvent.

Embodiment 3

[0035] The composition and mass percentage distribution of flux are as follows:

[0036] Water white rosin 12 wt%, hydrogenated rosin 25 wt%, succinic acid 5wt%, p-tert-butylbenzoic acid 6 wt%, ethylenediamine hydrochloride 0.8wt%, polyethylene glycol 8wt%, nonylphenol poly 0.6wt% of oxyethylene ether, 0.8wt% of triethylamine, and the rest of the solvent.

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PUM

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Abstract

The invention relates to scaling powder for a lead-free solder wire. The content of the scaling powder includes, by weight, 30-45% of rosin resin, 1-12% of organic acid activating agents, 0-1% of activating agent fortifier, 5-18% of protective agents, 0.1-1% of surface active agent, 0.5-1% of corrosion inhibitor, and the balance solvents. According to the scaling powder, smog is little, pungent smells do not exist, welding residues are few, washing is easy, and good welding effects are achieved.

Description

technical field [0001] The invention designs a flux for lead-free solder wire, especially for modifying its welding fumes and residues. Background technique [0002] With the rapid development of electronic products and the widespread application of lead-free products, people's awareness of environmental protection has become stronger, and the requirements for lead-free soldering have become increasingly stringent, which has prompted people to improve lead-free soldering from the formulation of solder and flux. [0003] Tin solder can be modified by adding metal elements, such as trace elements, or by changing the alloy ratio to adjust the performance of the solder, and can also be improved by optimizing the production process, etc., and so on, there are many methods. [0004] The optimization or innovative improvement of flux can greatly improve the welding effect. Flux has the functions of removing oxides on the surface of the busbar and solder alloy during welding, preve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/363
Inventor 胡洁
Owner 郴州金箭焊料有限公司
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