Flexile quick-drying three-proofing paint for printed circuit board

Abstract

The invention relates to the technical field of printed circuit board protection and concretely relates to flexile quick-drying three-proofing paint for a printed circuit board. Linseed oil-modified polyester resin is subjected to ultrasonic treatment in a solvent so that resin surface performances are improved and the resin has good reactivity and compatibility with other raw materials. Limonene can prevent resin coacervation in ultrasonic treatment. Polyvinylpyrrolidone and cellulose ether as raw materials can improve finished product flexibility, have film formation assistant effects, and provide excellent heat stability and fluidity for paint films. Acetylacetone and cobaltous naphthenate as raw materials accelerate paint curing and shorten curing time. The three-proofing paint has high adhesion and a fast drying rate, can be fast cured at a room temperature, has good paint film toughness, and does not crack easily after spray-coating thereby realizing lasting production.

Description

technical field [0001] The invention relates to the technical field of printed circuit board protection, in particular to a flexible fast-drying printed circuit board conformal paint 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 humidity, hig...

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