Three-proof paint for printed circuit board protection and preparation and use method thereof

A technology for printed circuit boards and conformal paints, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance, oil resistance and self-cleaning performance of the coating film, and achieve good self-cleaning, oil resistance, high gloss effect

Active Publication Date: 2015-08-26
河南黄河微步信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current three anti-paints form a film with high surface energy during coating, resulting in poor water resistance, oil resistance and self-cleaning performance of the coating film.

Method used

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  • Three-proof paint for printed circuit board protection and preparation and use method thereof
  • Three-proof paint for printed circuit board protection and preparation and use method thereof
  • Three-proof paint for printed circuit board protection and preparation and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a kind of anti-corrosion paint for the protection of printed circuit boards, the three anti-paints include the following components by mass percentage:

[0027]

[0028] Above-mentioned polyurethane acrylate resin can adopt following method to prepare:

[0029] Add 700g of polyester polyol XH-6480 (Nanyang Xianhe New Material Co., Ltd.) into the reaction bottle, after heating at 100°C and vacuuming for 1 hour, add diisocyanate TDI, dissolve and mix evenly and react for 3 hours, polyester polyol The mol ratio scope of the hydroxyl group in and the isocyanate group in the diisocyanate is 0.5: 1; Then add the hydroxyethyl methacrylate (HEMA) relative to the 5wt% of polyester polyol and diisocyanate gross mass in the product, cooling React at 75°C for 1 hour, add 5wt% initiator azobisisobutyronitrile relative to the mass of hydroxyethyl methacrylate, react at 75°C for 6 hours, cool, cool down to 50°C, and then add relative diisocyanate Hydroxyet...

Embodiment 2

[0033] This embodiment provides a kind of conformal paint for the protection of printed circuit boards, which includes the following components by mass percentage:

[0034]

[0035]

[0036] Above-mentioned polyurethane acrylate resin can adopt following method to prepare:

[0037] Add 500g of polyester polyol XH-8350 (Nanyang Xianhe New Material Co., Ltd.) into the reaction bottle, after heating at 120°C and vacuuming for 1 hour, add diisocyanate MDI, dissolve and mix evenly and react for 5 hours, polyester polyol The mol ratio scope of the hydroxyl group in and the isocyanate group in the diisocyanate is 0.8: 1; Then in the product, add the hydroxyethyl methacrylate (HEMA) relative to the 10wt% of polyester polyol and diisocyanate gross mass, cooling React at 85°C for 2 hours, add 5wt% initiator azobisisobutyronitrile relative to the mass of hydroxyethyl methacrylate, react at 85°C for 10 hours, cool, cool down to 60°C, and then add relative diisocyanate Hydroxyethyl ...

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Abstract

The invention provides a conformal coating for protection of a printed circuit board, and a preparation method and a usage method thereof. The conformal coating comprises the following components by weight: 12-30% of organosilicon modified acrylate resin, 10-30% of polyurethane acrylate resin, 20-40% of a fluorine-containing reactive diluent, 10-20% of a fluoride-free reactive diluent, 4-7% of a photoinitiator and 0.1-5.5% of an assistant. The paint film formed by the conformal coating provided by the invention has good water resistance, oil resistance, self-cleaning performance, scratch resistant performance, high glossiness and good adhesion.

Description

technical field [0001] The invention relates to the field of printed circuit board protective materials, in particular to a conformal paint used for printed circuit board protection and a preparation method and application method thereof. Background technique [0002] Conformal paint is also called printed circuit board (PCB board) protective oil, three-proof coating, three-proof glue, etc. The PCB circuit board coated with three-proof paint has waterproof, moisture-proof, dust-proof "three-proof" performance and resistance to cold and heat shock , Aging resistance, radiation resistance, salt spray resistance, ozone corrosion resistance, vibration resistance, good flexibility, strong adhesion and other properties, so as to improve and prolong their service life and ensure the safety and reliability of use. Under realistic conditions, such as chemical environment (fuel, coolant, etc.), vibration, high dust, salt spray, humidity and high temperature, etc., the circuit board ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D133/00C08G18/68C08G18/42
Inventor 张开运
Owner 河南黄河微步信息科技有限公司
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