Environment-friendly lead-free soldering-aiding paste

A flux paste, environmentally friendly technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of easy pollution, not enough environmental protection, etc., to achieve good solderability, excellent performance, solid content low effect

Inactive Publication Date: 2015-01-14
MINGGUANG RUICHUANG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing solder pastes contain heavy metals such as lead, w

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] An environment-friendly lead-free soldering paste, characterized in that: it includes the following raw materials in parts by weight: 60 parts of tin, 2 parts of silver, 0.2 parts of copper, 0.1 part of magnesium, 2 parts of dehydrorosin, 0.2 parts of cetyl bromide Parts, 2 parts of sebacic acid, 2 parts of ethylenediamine, 2 parts of diethylene glycol monobutyl ether, 3 parts of diethylene glycol monohexyl ether, 0.2 parts of bis stearic acid amide, 0.2 parts of BHT, 2, 3 0.2 parts of dibromopropanol.

[0013] The beneficial effects of the invention are: the invention does not contain lead, has good solderability, low solid content, less residue after welding and no need for cleaning. The invention has excellent performance, can overcome the disadvantages of the existing flux, and its use is more in line with the requirements of environmental protection.

Embodiment 2

[0015] An environment-friendly lead-free soldering paste, characterized in that it includes the following raw materials in parts by weight: 70 parts of tin, 3 parts of silver, 0.8 parts of copper, 0.3 parts of magnesium, 4 parts of dehydrorosin, and 0.5 parts of cetyl bromide Parts, 4 parts of sebacic acid, 3 parts of ethylenediamine, 4 parts of diethylene glycol monobutyl ether, 5 parts of diethylene glycol monohexyl ether, 0.8 parts of bis stearic acid amide, 0.6 parts of BHT, 2, 3 One dibromopropanol 0.6 part.

[0016] The beneficial effects of the invention are: the invention does not contain lead, has good solderability, low solid content, less residue after welding and no need for cleaning. The invention has excellent performance, can overcome the disadvantages of the existing flux, and its use is more in line with the requirements of environmental protection.

Embodiment 3

[0018] An environment-friendly lead-free soldering paste, characterized in that: it includes the following raw materials in parts by weight: 65 parts of tin, 2.5 parts of silver, 0.5 parts of copper, 0.2 parts of magnesium, 3 parts of dehydrorosin, 0.35 parts of hexadecyl bromide pyridine Parts, 3 parts of sebacic acid, 2.5 parts of ethylenediamine, 3 parts of diethylene glycol monobutyl ether, 4 parts of diethylene glycol monohexyl ether, 0.5 parts of bisstearic acid amide, 0.4 parts of BHT, 2,3 0.4 part of dibromopropanol.

[0019] The beneficial effects of the invention are: the invention does not contain lead, has good solderability, low solid content, less residue after welding and no need for cleaning. The invention has excellent performance, can overcome the disadvantages of the existing flux, and its use is more in line with the requirements of environmental protection.

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PUM

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Abstract

The invention discloses an environment-friendly lead-free soldering-aiding paste. The environment-friendly lead-free soldering-aiding paste is characterized by comprising the following raw materials in parts by weight: 60 to 70 parts of tin, 2 to 3 parts of silver, 0.2 to 0.8 parts of copper, 0.1 to 0.3 parts of magnesium, 2 to 4 parts of dehydrogenated rosin, 0.2 to 0.5 parts of hexadecyl pyridine bromide generation, 2 to 4 parts of sebacic acid, 2 to 3 parts of ethylenediamine, 2 to 4 parts of diethylene glycol monobutyl ether, 3 to 5 parts of ethylene glycol monoethyl ether, 0.2 to 0.8 parts of bis-stearamide, 0.2 to 0.6 parts of BHT (butylated hydroxytoluene) and 0.2 to 0.6 parts of 2,3-dibromo propanol. The environment-friendly lead-free soldering-aiding paste does not contain lead, is high in weldability, low in solid content, and few in residual materials after welding, is not required to be cleaned, and is excellent in performance, the defects of the current flux can be overcome, and the requirement on environment protection is also met by the utilization of the environment-friendly lead-free soldering-aiding paste.

Description

technical field [0001] The invention relates to the field of metal welding, in particular to an environment-friendly lead-free soldering paste. Background technique [0002] Flux can remove oxides during the soldering process and reduce the surface tension of the material to be soldered. It is widely used in the soldering of watch instruments, precision components, medical equipment, mobile communications, digital products, and various PCB boards and BGA solder balls. [0003] Solder paste appeared in the surface mount technology (Surface Mount Assembly, referred to as SMT) in the 1970s, which refers to printing and coating solder paste on the pads of printed circuit boards, and accurately attaching surface mount components to On the pads coated with solder paste, the circuit board is heated according to a specific reflow temperature curve to melt the solder paste, and its alloy components are cooled and solidified to form solder joints between components and printed circuit...

Claims

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Application Information

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IPC IPC(8): B23K35/26B23K35/36
CPCB23K35/262B23K35/3612
Inventor 徐志敏
Owner MINGGUANG RUICHUANG ELECTRIC
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