Three-proofing lacquer for circuit board preventing electromagnetic interference

An anti-electromagnetic interference and three-proof paint technology, applied in the field of coatings, can solve the problems of inability to resist environmental pollutants, short protection period, and difficult to repair, and achieve the effects of improving safety and reliability, firm adhesion, and easy spraying

Inactive Publication Date: 2015-09-02
ZHANGJIAGANG WUHU NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing three anti-paints mainly have shortcomings such as short protection period, high temperature, easy to fall off, inability to resist environmental pollutants, especially the corrosion of chemical pollutants, difficult to repair, toxic and harmful, etc. Therefore, it is necessary to improve the formula of the three anti-paints and further strengthen the circuit Improve the overall performance of the board and improve the protection effect to meet the needs of the rapid development of integrated circuit technology

Method used

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  • Three-proofing lacquer for circuit board preventing electromagnetic interference
  • Three-proofing lacquer for circuit board preventing electromagnetic interference
  • Three-proofing lacquer for circuit board preventing electromagnetic interference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An anti-electromagnetic interference circuit board conformal paint, the composition of the mass parts of the conformal paint is as follows: 20 parts of polyorganosiloxane, 6 parts of rosin modified alkyd resin, 12 parts of ethyl acetate, trioctyl phosphate 10 parts of ester, 0.6 parts of nano graphite, 0.8 parts of phosphorus titanium powder, 6 parts of mineral oil, 6 parts of N-methylpyrrolidone, 2 parts of antioxidant, 2 parts of defoamer.

[0021] The antioxidant is composed of the following substances: 2,6-tertiary butyl-4-4 methylphenol, bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide, didodecyl Alcohol ester, its molar ratio is 1:1.2:1.8.

[0022] The mass parts composition of described defoamer is as follows: 35 parts of beeswax, C 4 -C 8 Alcohol amine 8 parts, C 10 -C 18 10 parts of fatty acid, 12 parts of ethyl acetate.

[0023] The phosphorus titanium powder is composite red monophosphorus titanium powder.

Embodiment 2

[0025] An anti-electromagnetic interference circuit board conformal paint, the composition of the mass parts of the conformal paint is as follows: 24 parts of polyorganosiloxane, 8 parts of rosin modified alkyd resin, 13 parts of ethyl acetate, trioctyl phosphate 12 parts of ester, 0.8 part of nano graphite, 1.0 part of phosphorus titanium powder, 8 parts of mineral oil, 6.5 parts of N-methylpyrrolidone, 3 parts of antioxidant, 3 parts of defoamer.

[0026] The antioxidant is composed of the following substances: 2,6-tertiary butyl-4-4 methylphenol, bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide, didodecyl Alcohol ester, its molar ratio is 1:1.5:1.8.

[0027] The mass parts of described defoamer are composed as follows: 38 parts of beeswax, C 4 -C 8 Alcohol amine 10 parts, C 10 -C 18 12 parts of fatty acid, 16 parts of ethyl acetate.

[0028] The phosphorus-titanium powder is composite red monophosphorus-titanium powder. Preferably, the particle size of the phosphorus-ti...

Embodiment 3

[0030] A kind of anti-electromagnetic interference circuit board conformal paint, the composition of the mass parts of the three anti-paints is as follows: the composition of the mass parts of the three anti-paints is as follows: 30 parts of polyorganosiloxane, 8 parts of rosin modified alkyd resin 14 parts of ethyl acetate, 12 parts of trioctyl phosphate, 0.8 parts of nano-graphite, 1.2 parts of phosphorus titanium powder, 8 parts of mineral oil, 8 parts of N-methylpyrrolidone, 4 parts of antioxidant, 6 parts of defoamer .

[0031] The antioxidant is composed of the following substances: 2,6-tertiary butyl-4-4 methylphenol, bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide, didodecyl Alcohol ester, its molar ratio is 1:1.2:1.8.

[0032] The mass parts composition of described defoamer is as follows: 40 parts of beeswax, C 4 -C 8 Alcohol amine 12 parts, C 10 -C 18 12 parts of fatty acid, 18 parts of ethyl acetate.

[0033] The phosphorus titanium powder is composite red mo...

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Abstract

The invention relates to the field of coating technology, in particular to three-proofing lacquer for circuit board preventing electromagnetic interference. The three-proofing lacquer comprises the following components in parts by mass: 20-40 parts of polysiloxane, 6-12 parts of rosin modified alkyd resin, 12-16 parts of ethyl acetate, 10-15 parts of trioctyl phosphate, 0.6-1.2 parts of nano-graphite, 0.8-1.8 parts of titanium phosphide powder, 6-10 parts of mineral oil, 6-8 parts of N-Methylpyrrolidine, 2-6 parts of antioxygen, and 2-8 parts of defoamer. The polysiloxane, the rosin modified alkyd resin, the trioctyl phosphate, the nano-graphite, the titanium phosphide powder, the mineral oil and the N-Methylpyrrolidine are compounded to use, so that the three-proofing lacquer is easy to spray during the actual use process, is quick in paint film curing, has both hardness and toughness, is transparent in a paint film, is firm to attach, is waterproof and dampproof, is good in heat stability, has a certain shielding effect on electromagnetic wave, and is beneficial to improving the safety reliability of the circuit board and reducing the failure occurrence probability.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a conformal paint for circuit boards for preventing electromagnetic interference. Background technique [0002] As electronic products gradually turn to miniaturization, integration, and multi-function, the electronic assembly industry is also developing at a high speed, and the requirements for the safety performance and appearance of assembled products are also getting higher and higher. [0003] After the electronic components are assembled, the circuit board may be in different environments during use, such as moisture, smog, chemical corrosion, high dust, vibration, etc., which will cause problems such as mildew and corrosion on the circuit board, resulting in the occurrence of circuit boards. Fault. Conformal paint is a coating material with a special formula. The three-proof paint is coated on the surface of the circuit board to form a transparent protective film. The pr...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D167/08C09D7/12
Inventor 徐再徐凯赵维达赵云龙
Owner ZHANGJIAGANG WUHU NEW MATERIAL TECH DEV
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