Three-proofing lacquer rapidly solidified at room temperature and used for printed circuit boards

Abstract

The invention relates to the technical field of protection of printed circuit boards, and concretely relates to three-proofing lacquer rapidly solidified at room temperature and used for printed circuit boards. According to the three-proofing lacquer, epoxy acrylate and glycidyl-ester type epoxy resin are mixed in a solvent and subjected to ultrasonic dispersion processing, so that the viscosity and the surface energy of the obtained mixed resin are effectively reduced, and the mixed resin shows good usage property. The mixed resin is mixed with other low-toxicity environment-friendly additives, so that the obtain three-proofing lacquer can be rapidly solidified at room temperature, the production efficiency is improved, and a lacquer film with uniform thickness and good adhesive force can be formed on the surface of an appliance by using a spraying coating process, a brushing coating process or a dipping process, the lacquer film has good water proofness, moisture resistance, chemical corrosion resistance, high-heat resistance, antistatic property and other efficacy, and helps to improve the safety of a circuit board and reduce fault occurrence, and the three-proofing lacquer is applicable to protect circuit boards working at high-heat moist environments and the like.

Description

technical field [0001] The invention relates to the technical field of printed circuit board protection, in particular to a conformal paint for a room-temperature fast-curing printed circuit board 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 diverse, and may face...

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