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High-efficiency environment-friendly UV-moisture double-cured three-proofing paint for flexible circuit board

A flexible circuit board, an environmentally friendly technology, applied in anti-corrosion coatings, fire-resistant coatings, coatings, etc., can solve problems such as combustion and explosion, induction of occupational diseases, and harm to human health, and achieve strong chemical corrosion resistance, improve production efficiency, and adhesion super effect

Active Publication Date: 2019-04-12
YIK SHING TAT INDUSTRIALCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultraviolet light is a necessary condition for UV curing, and it is easy to cause the phenomenon that the shadow area of ​​the circuit board is not dry.
[0004] At present, the conformal paint applied to rigid circuit boards in the market is relatively mature, but there are still big problems in applying to flexible circuit boards. The key is that when flexible circuit boards are bent at high frequency and high strength, if the conformal paint cannot When the requirements of flexibility and adhesion are met, it is easy to cause cracking and delamination.
On the other hand, there are few conformal paint products for flexible circuit boards, and they are solvent-based conformal paints. Because they contain organic solvents such as benzene, they have the danger of combustion and explosion, and are harmful to human health. Long-term exposure can induce occupational diseases.

Method used

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  • High-efficiency environment-friendly UV-moisture double-cured three-proofing paint for flexible circuit board
  • High-efficiency environment-friendly UV-moisture double-cured three-proofing paint for flexible circuit board
  • High-efficiency environment-friendly UV-moisture double-cured three-proofing paint for flexible circuit board

Examples

Experimental program
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preparation example Construction

[0029] In the present invention, monomers containing C=C double bonds and -NHCOO- can be purchased from the market, for example, can be selected from ethyl [2-(vinylthio) ethyl] carbamate, ethyl ( 2-methyl-4-penten-1-yl) carbamate, naphthalene-1-yl N-prop-2-enyl carbamate, 2-methyl-2-propyl[(4E) One of -6-oxo-1,4-hexadien-3-yl] carbamate, etc. It can also be prepared by reacting diisocyanate, polyol, and hydroxyalkyl acrylate as raw materials under a solvent and a catalyst. The specific preparation method includes the following steps:

[0030] Take a certain amount of diisocyanate, hydroxyalkyl acrylate (such as hydroxyethyl (meth)acrylate) and ethylene glycol, add to the reaction kettle, in the presence of a solvent (such as acetone) and a catalyst (such as dibutyltin dilaurate) 60 ° C reflux reaction for 3 hours that is.

[0031] In the present invention, polyurethane modified acrylic resin is adopted, and isocyanate reacts with moisture in the air to realize dark curing w...

Embodiment 1

[0054] Embodiment 1 provides a high-efficiency and environment-friendly UV-moisture dual-curing conformal paint for flexible circuit boards. The raw materials for the preparation of the conformal paint, in parts by weight, include:

[0055]

[0056] Described modified acrylic resin is polyurethane modified acrylic resin, and its preparation method comprises the steps:

[0057] 0.1mol of acrylic acid, 0.1mol of ethyl (2-methyl-4-penten-1-yl) carbamate (CAS: 112476-23-0), 0.02mol of N-prop-2-enylbenzene Amide (CAS: 10283-95-1) was added to 100mL of acetone, stirred and mixed, the temperature was raised to 60°C, then 2.7g of potassium persulfate was added, the reaction was continued under reflux for 2 hours, and then cooled and discharged.

[0058] The reactive diluent is 8-hydroxyoctyl acrylate; the leveling aid is leveling aid A; the defoamer is polyoxyethylene polyoxypropylene pentaerythritol ether; the wetting agent is diethylene glycol ; The flame retardant is three (2,3...

Embodiment 2

[0063] Embodiment 2 provides a high-efficiency and environment-friendly UV-moisture dual-curing conformal paint for flexible circuit boards. The raw materials for the preparation of the conformal paint, in parts by weight, include:

[0064]

[0065] Described modified acrylic resin is polyurethane modified acrylic resin, and its preparation method comprises the steps:

[0066] 0.1mol of acrylic acid, 0.1mol of ethyl (2-methyl-4-penten-1-yl) carbamate (CAS: 112476-23-0), 0.02mol of N-prop-2-enylbenzene Amide (CAS: 10283-95-1) was added to 100mL of acetone, stirred and mixed, the temperature was raised to 60°C, then 2.7g of potassium persulfate was added, the reaction was continued under reflux for 2 hours, and then cooled and discharged.

[0067] The reactive diluent is 8-hydroxyoctyl acrylate; the leveling aid is leveling aid A; the defoamer is polyoxyethylene polyoxypropylene pentaerythritol ether; the wetting agent is diethylene glycol ; The flame retardant is three (2,3...

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PUM

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Abstract

The invention relates to the technical field of flexible circuit board protection, and particularly relates to high-efficiency environment-friendly ultraviolet (UV)-moisture double-cured three-proofing paint for a flexible circuit board. The three-proofing paint is prepared from the following raw materials in parts by weight: 30-70 parts of modified acrylic resin, 30-70 parts of a reactive diluents, 1-10 parts of an initiator, 0.1-8 parts of a leveling aid, 0.1-5 parts of a defoaming agent, 0.1-5 parts of a wetting agent and 0.1-6 parts of a flame retardant.

Description

technical field [0001] The invention relates to the technical field of flexible circuit board protection, in particular to a high-efficiency and environment-friendly UV-moisture double-curing conformal paint for flexible circuit boards. Background technique [0002] With the rapid development of the electronics industry, electronic products tend to be high-density, miniaturized, and highly reliable. Compared with rigid circuit boards, flexible circuit boards made of polyimide or polyester film can be bent, wound, and folded freely, and can withstand millions of dynamic bendings without damaging the wires. The layout requires arbitrary arrangement, and arbitrary movement and expansion in three-dimensional space, so as to achieve the integration of component assembly and wire connection. In practical applications, flexible circuit boards are in a complex environment and are easily affected by factors such as moisture, mold, salt spray, high dust, vibration, and corrosive gase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D4/06C09D5/08C08F220/06C08F226/02
CPCC08F220/06C08F226/02C09D4/06C09D5/08C09D5/18
Inventor 吴建新张彩绵石学堂
Owner YIK SHING TAT INDUSTRIALCO LTD
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