Water-based cleaning solution for cleaning printed circuit board and preparation method thereof

Abstract

The invention relates to a water-based cleaning solution for cleaning a printed circuit board, which is prepared from the following raw materials: 10-35% of fatty amine, 0.1-5% of alcohol amine compound, 10-35% of alcohol ester compound, 0.1-5% of surfactant, 0.1-5% of corrosion inhibitor and 25-75% of solvent. The cleaning solution is good in cleaning performance, free of damaging an ozone layer, and good in environment friendliness. The preparation method of the cleaning solution comprises the following processing steps: weighting materials of certain formula quantities according to a formula; adding the solvent in a reactor, adding the alcohol amine compound in the reactor and stirring uniformly; adding fatty amine in the reactor and stirring uniformly; adding the alcohol ester compound in the reactor and stirring uniformly; adding the surfactant in the reactor and stirring uniformly; and adding the corrosion inhibitor in the reactor and stirring uniformly to obtain the product. The method is simple in process, easy to operate and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of cleaning agents, in particular to a water-based cleaning solution for cleaning printed circuit boards and a preparation method thereof. Background technique [0002] During the assembly and welding process of printed circuit board (Printed Circuit Board), in order to ensure the reliability of welding, it is necessary to use highly active flux. These flux residues on the PCB will corrode the circuit board and components, while reducing its surface insulation resistance. With the erosion of humidity, dust, oil fume, static electricity and various harmful gases in the environment, the powdered flux will continuously absorb these impurities, and even cause serious corrosion and leakage of circuit boards, affecting the reliability of circuit boards. [0003] The traditional circuit board cleaning process commonly used at present generally uses ODS (ozone-depleting substances) cleaning agents containing freon ...

AI Technical Summary

Problems solved by technology

[0006] (1) For many viscous waxy dirt, such as rosin, glue, and blind holes and gaps on workpieces, hydrophobic parts cannot completely remove organic dirt and particle dirt;

[0007] (2) The residues after cleaning with some water-based cleaning agents are difficult to remove, especially the residues in blind holes and gaps, which may cause adverse effects on subsequent processes or applications;

[0008] (3) The residual cleaning agent is easy to cause corrosion of metal parts such as pads on PCBA and pins of components;

[0009] (4) The cleaning waste liquid is complicated to deal with and difficult to recycle

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