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Organic silicon modified polyurethane acrylate ultraviolet light and moisture dual-curing conformal coating and preparation method thereof

A polyurethane acrylate, acrylate technology, applied in polyurea/polyurethane coatings, fire retardant coatings, coatings, etc., to achieve excellent high and low temperature resistance

Pending Publication Date: 2022-03-25
广东腐蚀科学与技术创新研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings in the protective performance of the existing conformal paint systems, and the performance requirements of the conformal paint for new energy vehicles and 5G communications, the purpose of the present invention is to provide a silicone-modified polyurethane acrylate UV light moisture double The cured conformal paint and its preparation method combine the characteristics of electrical insulation, flexibility, high and low temperature resistance in the organic silicon system and the high hardness and high protection performance of the polyurethane conformal paint surface, which can well meet the needs of new energy vehicles and 5G Conformal coatings for communications are required for thermal shock resistance, high temperature resistance, moisture resistance, chemical corrosion resistance and electrical insulation performance requirements, and the conformal coatings of the invention have the same or better protection for circuit boards of electronic products than other systems of conformal coatings Excellent three-defense protection performance

Method used

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  • Organic silicon modified polyurethane acrylate ultraviolet light and moisture dual-curing conformal coating and preparation method thereof
  • Organic silicon modified polyurethane acrylate ultraviolet light and moisture dual-curing conformal coating and preparation method thereof
  • Organic silicon modified polyurethane acrylate ultraviolet light and moisture dual-curing conformal coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example, 168.19g of hexamethylene diisocyanate, 120g of polyethylene glycol, 180g of hydroxy polydimethylsiloxane and 200g of toluene were added to a three-necked flask, and 0.05g of organotin catalyst was added. ℃ for 2 hours to prepare a prepolymer; then add 48 g of hydroxyethyl acrylate, react at 65 ℃ for 5 hours, and finally distill the toluene to prepare a silicone-modified urethane acrylate resin. Through testing and calculation, the molar ratio of isocyanate, carbon-carbon double bond and silicon-oxygen bond in the modified resin is 18:8:1.

[0031] The formula preparation process of the three anti-paint is: in parts by weight, 0.02 parts of optical brightener (OB), 0.82 parts of defoamer (BYK UV 3505 acrylate-modified polysiloxane), 5 parts of photoinitiator (1-hydroxycyclohexyl phenyl ketone), 10 parts of acrylate monomer (isobornyl acrylate) and 5.6 parts of silane coupling agent (acryloxypropyltrimethoxysilane) were added to the stirrer in sequence, ...

Embodiment 2

[0033] In this example, 168.19g of hexamethylene diisocyanate, 136g of polyethylene glycol, 180g of hydroxy polydimethylsiloxane and 200g of toluene were added to a three-necked flask, and 0.05g of organotin catalyst was added. ℃ for 2 hours to prepare a prepolymer; then add 54 g of hydroxypropyl acrylate, react at 65 ℃ for 5 hours, and finally distill off the toluene to prepare a silicone-modified urethane acrylate resin. Through testing and calculation, the molar ratio of isocyanate, carbon-carbon double bond and silicon-oxygen bond in the modified resin is 17:9:1.

[0034] The formula preparation process of the three anti-paint is: by weight, 0.06 parts of optical brightener (OB), 0.86 parts of defoamer (BYK UV 3505 acrylate modified polysiloxane), 6 parts of photoinitiator (1-hydroxycyclohexyl phenyl ketone), 12 parts of acrylate monomer (isobornyl acrylate) and 5.6 parts of silane coupling agent (acryloxypropyltrimethoxysilane) were added to the stirrer in sequence, Full...

Embodiment 3

[0036]In this example, 168.19g of hexamethylene diisocyanate, 120g of polyethylene glycol, 180g of hydroxy polydimethylsiloxane and 200g of toluene were added to a three-necked flask, and 0.05g of organotin catalyst was added. ℃ for 2 hours to prepare a prepolymer; then add 60 g of hydroxyethyl methacrylate, react at 65 ℃ for 5 hours, and finally distill the toluene to prepare a silicone-modified urethane acrylate resin. Through testing and calculation, the molar ratio of isocyanate, carbon-carbon double bond and silicon-oxygen bond in the modified resin is 16:10:1.

[0037] The formula preparation process of the three anti-paint is: by weight, 0.08 parts of optical brightener (OB), 0.68 parts of defoamer (BYK UV 3505 acrylate modified polysiloxane), 8 parts of photoinitiator (1-hydroxycyclohexyl phenyl ketone), 8 parts of acrylate monomer (isobornyl acrylate) and 7 parts of silane coupling agent (acryloyloxypropyltrimethoxysilane) were added to the stirrer in sequence, Fully...

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Abstract

The invention relates to an organic silicon modified polyurethane acrylate ultraviolet light and moisture dual-curing conformal coating and a preparation method thereof, and belongs to the field of conformal coatings. The conformal coating is prepared from the following components in parts by mass: 30 to 80 parts of organic silicon modified polyurethane acrylate resin, 10 to 40 parts of acrylate monomer, 2 to 15 parts of silane coupling agent, 2 to 10 parts of photoinitiator, 0.2 to 1 part of defoaming agent, 0.01 to 0.1 part of fluorescent whitening agent and 0.02 to 0.1 part of catalyst. The materials are physically stirred to prepare the ultraviolet light and moisture dual-curing conformal coating, and the ultraviolet light and moisture dual-curing conformal coating can be rapidly photocured to reach a surface dry state under the ultraviolet light irradiation of a middle-high pressure mercury lamp, so that the production efficiency is improved; and a paint film has the characteristics of high and low temperature impact resistance, good flame retardance and excellent electrical insulating property of organic silicon and high mechanical strength, excellent protection performance and the like of polyurethane.

Description

technical field [0001] The invention relates to an organosilicon-modified polyurethane acrylate ultraviolet light moisture dual-curing conformal paint and a preparation method thereof, belonging to the field of conformal paints. Background technique [0002] With the rise of new energy vehicles and 5G technology, high-performance conformal paint is a key material. The PCB circuit board of the new energy vehicle battery management system needs to use high-performance conformal paint to avoid corrosion in harsh environments, and to resist thermal shock, high temperature, moisture and chemical corrosion. The new generation of 5G cellular mobile communication technology has the characteristics of high frequency, high speed and high efficiency transmission, coupled with the high integration of 5G electronic components, it puts forward higher requirements for the conformal coating of circuit boards used in 5G. [0003] Existing conformal coatings are chemically divided into four ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/16C09D5/25C09D7/63C08G18/12C08G18/48C08G18/61C08G18/67
CPCC09D175/16C09D7/63C09D5/18C08G18/12C08G18/4833C08G18/61C08G18/672C08G18/4009C08G2150/00C08K5/5425
Inventor 钟来富刘福春韩恩厚
Owner 广东腐蚀科学与技术创新研究院
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