Three-proofing lacquer for accelerating heat radiation of circuit board

Abstract

The invention relates to the technical field of printed circuit board protection and particularly relates to a three-proofing lacquer for accelerating heat radiation of a circuit board. The three-proofing lacquer is prepared by taking unsaturated polyester resin as a film forming matter, the unsaturated polyester resin is firstly subjected to ultrasonic treatment in a solvent, so that the unsaturated polyester resin more easily reacts and is more easily compatible with other raw materials, the curing speed is increased, and the performance of a paint film is improved; the added silver paste has a favorable heat conductivity coefficient so that the heat radiation of the paint film can be accelerated; and due to the adoption of raw materials such as tetraethyl orthosilicate and diethylene glycol dibenzoate, the performance of the unsaturated polyester resin can be improved, the shrinkage rate can be reduced, and the paint film can be prevented from cracking. The three-proofing lacquer provided by the invention can be rapidly cured at normal temperature; in addition, the paint film is high in transparency, full and firm, resistant to thermal oxidation and easy to spray, not only has the traditional three-proofing performance, but also can accelerate the heat radiation of the circuit board, avoid circuit board damage caused by heat accumulation and improve the working safety.

Description

technical field [0001] The invention relates to the technical field of printed circuit board protection, in particular to a conformal paint for accelerating heat dissipation of a 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 hum...

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