A kind of pcb alkaline cleaning agent and preparation method thereof

Abstract

The invention relates to the field of PCB cleaning, and provides a PCB alkaline detergent and a preparation method thereof, which is used for solving the metal corrosion problem in the PCB cleaning process. The PCB alkaline detergent is prepared from 2 to 8 parts by weight of long-chained carboxylate polyoxyethylene, 1 to 10 parts of trimethylhydroxyethyl propylene diamine, 1 to 6 parts by weightof sodium citrate, 1 to 3 parts by weight of a corrosion inhibitor, 6 to 8 parts by weight of DBE, 0.05 to 0.2 part by weight of a silicone oil defoaming agent, and 60 to 80 parts by weight of deionized water. The detergent can effectively clean the surface of PCB without corroding the metal on the surface of the PCB.

Description

technical field [0001] The invention relates to the field of PCB cleaning, in particular to a PCB alkaline cleaning agent and a preparation method thereof. Background technique [0002] In recent years, major changes have taken place in the field of electronic assembly technology, such as the miniaturization of components, the high density of component mounting and structure, etc. At the same time, the improvement of solder paste formula makes the cleaning of residual flux on PCB more and more difficult. more and more difficult. [0003] Traditional solvent-based cleaning agents have been gradually phased out due to the existence of certain fire safety hazards and the great damage to the environment and human body. At present, the popular PCB water-based cleaning agents on the market are mainly strong alkaline cleaning agents. This type of cleaning agent has a strong decontamination ability, but it will cause great damage to the materials and components on the surface of th...

AI Technical Summary

Problems solved by technology

[0003] Traditional solvent-based cleaning agents have been gradually phased out due to the existence of certain fire safety hazards and the great damage to the environment and the human body.

At present, the popular PCB water-based cleaning agents on the market are mainly strong alkaline cleaning agents. This type of cleaning agent has a strong decontamination ability, but it will cause great damage to the materials and components on the surface of the PCB, and it also has harmful effects on the human body. certain hazard

For this reason, people have developed a new type of alkaline water-based cleaning agent. The new alkaline water-based cleaning agent can effectively remove all kinds of flux residues, but sometimes it will corrode the metal materials on the PCB board.