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A transparent protective film against high-power electromagnetic waves and its production method

A technology for transparent protection and production methods, applied in chemical instruments and methods, layered products, electrical components, etc., can solve the problems of mechanical property obstruction, unfavorable transparency, loss of permeability of protective films, etc., to eliminate color effects, improve Transparency, the effect of improving absorption performance

Active Publication Date: 2022-03-11
广东国科电磁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application of protective film, based on the addition of wave-absorbing fillers, the permeability of the protective film will be lost, and a large amount of filler is required to resist high-power electromagnetic waves, which is even more detrimental to transparency and hinders its mechanical properties.

Method used

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  • A transparent protective film against high-power electromagnetic waves and its production method
  • A transparent protective film against high-power electromagnetic waves and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of transparent substrate:

[0042] Take polyethylene terephthalate as a transparent substrate;

[0043] (2) Preparation of medium layer:

[0044] a. In a nitrogen atmosphere, take tetrahydrofuran, add 4-carboxyphenylboronic acid and 3-fluorobromobenzene, stir and mix, add potassium carbonate aqueous solution, tetrakis(triphenylphosphine)palladium, heat to reflux, stir for 5 hours, and cool to room temperature , suction filtration, extraction, washing, and drying to obtain fluorinated biphenyl; wherein, the molar ratio of 4-carboxyphenylboronic acid and 3-fluorobromobenzene is 1:1, and the extractant is dichloromethane;

[0045] b. In a nitrogen atmosphere, take tetrahydrofuran, add fluorinated biphenyl, adjust the system temperature to -75°C, add sec-butyllithium, stir for 2 hours; add trimethyl borate in tetrahydrofuran, return to room temperature, react for 4 hours, add Glacial hydrochloric acid, liquid separation, extraction, washing, drying, and re...

Embodiment 2

[0054] (1) Preparation of transparent substrate:

[0055] Take polyethylene terephthalate as a transparent substrate;

[0056] (2) Preparation of medium layer:

[0057] a. In a nitrogen atmosphere, take tetrahydrofuran, add 4-carboxyphenylboronic acid and 3-fluorobromobenzene, stir and mix, add potassium carbonate aqueous solution, tetrakis(triphenylphosphine)palladium, heat to reflux, stir for 5 hours, and cool to room temperature , suction filtration, extraction, washing, and drying to obtain fluorinated biphenyl; wherein, the molar ratio of 4-carboxyphenylboronic acid and 3-fluorobromobenzene is 1:1, and the extractant is dichloromethane;

[0058] b. In a nitrogen atmosphere, take tetrahydrofuran, add fluorinated biphenyl, adjust the system temperature to -76°C, add sec-butyllithium, stir for 2 hours; add trimethyl borate in tetrahydrofuran, return to room temperature, react for 4 hours, add Glacial hydrochloric acid, liquid separation, extraction, washing, drying, and re...

Embodiment 3

[0067] (1) Preparation of transparent substrate:

[0068] Take polyethylene terephthalate as a transparent substrate;

[0069] (2) Preparation of medium layer:

[0070] a. In a nitrogen atmosphere, take tetrahydrofuran, add 4-carboxyphenylboronic acid and 3-fluorobromobenzene, stir and mix, add potassium carbonate aqueous solution, tetrakis(triphenylphosphine)palladium, heat to reflux, stir for 6 hours, and cool to room temperature , suction filtration, extraction, washing, and drying to obtain fluorinated biphenyl; wherein, the molar ratio of 4-carboxyphenylboronic acid and 3-fluorobromobenzene is 1:1, and the extractant is dichloromethane;

[0071] b. In a nitrogen atmosphere, take tetrahydrofuran, add fluorinated biphenyl, adjust the system temperature to -78°C, add sec-butyllithium, and stir for 3 hours; add trimethyl borate in tetrahydrofuran, return to room temperature, react for 5 hours, add Glacial hydrochloric acid, liquid separation, extraction, washing, drying, an...

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Abstract

The invention discloses a transparent protective film resistant to high-power electromagnetic waves and a production method, comprising the following steps: (1) taking polyethylene terephthalate as a transparent substrate; (2) taking 4-carboxyphenylboronic acid, 3 ‑Fluorobromobenzene, trimethyl borate, 2,6‑difluoro‑4‑bromoaniline, cetyltrimethylammonium bromide, 4,4',4”‑(benzene‑1,3,5‑ Tri-base three (acetylene-2,1-diyl)) triphenylamine, hydrogen fluoride, ferric chloride, silica gel as raw materials, prepare medium layer; (3) stack another layer of transparent matrix on the medium layer, thermal compound, obtain Protective film. The present invention forms a fluorine-containing biphenyl structure through raw materials, forms a basic structure, introduces a long chain of an alkyl group, and introduces 4,4', 4"-(benzene-1,3,5-triyl tri(acetylene-2, 1-diyl)) triphenylamine, and fluorinated amino group, to complex iron ions, eliminate the color influence of metal ions, improve the transparency and absorbing performance of the protective film, and the phenylacetylene coupling in the structure further improves the protection of the prepared film. The absorption performance of the film to high-frequency electromagnetic waves.

Description

technical field [0001] The invention relates to the technical field of protective films, in particular to a transparent protective film resistant to high-power electromagnetic waves and a production method. Background technique [0002] With the rapid development of modern science and technology, the impact of electromagnetic radiation on the environment has become increasingly prominent. In daily life, work, and production, we often encounter various problems caused by electromagnetic wave interference. Therefore, in order to control electromagnetic pollution, absorbing or greatly weakening the electromagnetic wave energy received by the surface has become one of the important topics in material science. In the field of electromagnetic wave protection, commonly used absorbing materials are graphene, carbon black, ferrite, silicon carbide, etc. In the application of protective film, the permeability of the protective film will be lost due to the addition of wave-absorbing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00C08J7/04C09D5/32C09D183/04B32B27/36B32B27/06B32B37/00B29C65/02C08L67/02
CPCH05K9/0081C08J7/0427C09D5/32C09D183/04B32B27/36B32B27/08B32B37/00B29C65/02C08J2367/02C08J2483/04B32B2037/243B32B2250/244B32B2255/10B32B2307/212B32B2307/412B29L2007/002C08K5/18
Inventor 邓海扑王丽萍马鑫海代忠信戴宗良刘锋
Owner 广东国科电磁科技有限公司