Antibacterial mould-proof photo-curing conformal coating for printed-circuit boards

Abstract

The invention relates to the technical field of printed-circuit boards, in particular to an antibacterial mould-proof photo-curing conformal coating for printed-circuit boards. According to the conformal coating, urethane acrylate and epoxy acrylate are subjected to ultrasonic processing in a mixed solvent to improve surface activity and improve curing rate; styrene-maleic anhydride copolymer can effectively improve adhesive force of paint films; chitosan fibers, tributyl tin chloride and the like have good antibacterial and mould-proof capabilities as well as can destory growth and propagation of microorganisms; the conformal coating prepared by the invention is formed in a photo-curing manner, so that the conformal coating is more environment-friendly and efficient; the finished product of the conformal coating is good in rheological property, easy to spray, waterproof, moistureproof, firm in adhesion of the paint films, and capable of performing enduring protection in high-humidity environments and avoiding microbe multiplication; the conformal coating is particularly suitable for moist environments with bad ventilation conditions as well as for places rich in nutrient substances for reducing damage of microorganisms on coatings.

Description

technical field [0001] The invention relates to the technical field of protection of printed circuit boards, in particular to an antibacterial and anti-mildew type light-cured conformal paint for printed circuit boards and a preparation method thereof. Background technique [0002] Printed circuit board refers to the formation of point-to-point interconnection lines and printed components on an insulating substrate according to a predetermined design, and is a provider of electrical connections for electronic components. Circuit boards are very common in daily life, ranging from small mobile phones, USB flash drives, and cameras to high-end products such as aerospace and high-speed trains. With the increasing variety and quantity of electronic products, it is particularly important to strictly control the quality of circuit boards to improve the competitiveness of electronic products. In the actual application process, the use environment of the circuit board is complex and...

AI Technical Summary

Problems solved by technology

In the actual application process, the use environment of the circuit board is complex and diverse, and may face humidity, high heat, salt spray, low temperature, vibration, high dust and other environments. If no corresponding effective protection is carried out, the circuit board will quickly appear corrosion, deformation, Mildew, aging and other problems will eventually lead to circuit failure and equipment failure

[0003] In order to reduce the damage to the circuit board by the external environment and ensure the normal operation of the equipment, protective paint is often sprayed on the surface of the circuit board, also known as three anti-paint, and its main chemical components are acrylate, silicone, polyurethane, epoxy resin, etc. , the working principle is to form a protective film on the surface of the circuit board to protect the circuit board from the damage of the working environment, thereby improving the quality and reliability of the circuit board. Resist environmental pollutants, especially the corrosion of chemical pollutants, not easy to repair, toxic and harmful, etc., so it is necessary to improve the three anti-paint formula, further strengthen the comprehensive performance of the circuit board, improve the protection effect, in order to meet the rapid development of integrated circuit technology need