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Photonic crystal structure and Anti-forgery color conversion film comprising same

A photonic crystal, color conversion technology, applied in optics, optical components, chemical instruments and methods, etc., can solve the problems of high product cost, expensive, large RFID tags and so on

Active Publication Date: 2019-08-30
KOREA RES INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are limits to the information that can be recorded with such holograms, which makes it difficult to produce finely detailed holograms and consumers in general to distinguish their authenticity
[0004] In addition, RFID tags that store data read from unique IDs or sensors and transmit information in various ways when requested by the reader are bulky and expensive, making the cost of application to products high
In addition, a separate reader is required to distinguish its authenticity, making it not easy for consumers to use
[0005] In addition, optically variable ink (OVI), which shows different colors according to viewing angles, is widely used in security prints such as banknotes, but general public such as consumers have difficulty distinguishing changes in colors, and applicable products are limited

Method used

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  • Photonic crystal structure and Anti-forgery color conversion film comprising same
  • Photonic crystal structure and Anti-forgery color conversion film comprising same
  • Photonic crystal structure and Anti-forgery color conversion film comprising same

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment A

[0342] Preparation Example A: Preparation of BPAA

[0343] After introducing 9.86 g of 4-aminobenzophenone, 15 mL of triethylamine, and 80 mL of dichloromethane into the 250 mL round bottom flask, the flask was placed in ice water. 4.06 mL of acryloyl chloride was added to the flask, and the mixture was stirred for 12 hours. After the reaction was complete, the solvent was removed and then dried in a vacuum oven to obtain N-(4-benzoylphenyl)acrylamide as a yellow solid.

preparation Embodiment B

[0344] Preparation Example B: Preparation of BPA

[0345] After introducing 10 g of 4-hydroxybenzophenone, 20 mL of triethylamine, and 120 mL of dichloromethane into a 250 mL round bottom flask, the flask was placed in ice water. 4.92 mL of acryloyl chloride was added to the flask, and the mixture was stirred for 12 hours. After the reaction was complete, the solvent was removed, followed by drying in a vacuum oven to obtain 4-acryloyloxybenzophenone as a yellow solid.

preparation Embodiment C

[0346] Preparative Example C: Preparation of FEAA

[0347]After introducing 10 g of 2-fluoroethylamine and 12 mL of triethylamine into the round bottom flask, the flask was placed in ice water. 7.7 mL of acryloyl chloride was slowly added dropwise into the flask with stirring. When all the solution was added, the mixture was stirred at room temperature for 12 hours. After the reaction was complete, the solvent was removed using a rotary evaporator to obtain pure N-(2-fluoroethyl)acrylamide as a yellow liquid.

[0348] Synthesis of Copolymer

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Abstract

The present invention relates to an anti-forgery color conversion film comprising a photonic crystal structure in which color is changed by an external stimulus such as breath, whereby a consumer having an article including the color conversion film can easily determine whether the article is genuine or not.

Description

technical field [0001] The invention relates to a photonic crystal structure and an anti-counterfeiting color conversion film containing the photonic crystal structure. Background technique [0002] Recently, counterfeiting and falsification of branded products has become a social problem, and various technologies for preventing forgery and falsification have been developed. For example, there are technologies such as holograms attached to products in the form of anti-counterfeiting stickers, radio frequency identification (RFID) tags in the form of electronic tags, optically variable ink (OVI) through printing methods, Braille, gravure printing, etc. . [0003] The most typical technique is a hologram, and a hologram is a medium in which an interference pattern for reproducing a stereoscopic image is recorded, which is produced using the principle of holography. However, there are limitations to the information that can be recorded with such holograms, which makes it diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/02B32B27/08B32B27/28B32B27/30C08J5/18C08L33/24C08L33/08C08L25/12C08L39/04
CPCB32B7/02B32B27/08B32B27/28B32B27/30C08J5/18C08L25/12C08L33/08C08L33/24C08L39/04C08F226/10C08F220/06C08F226/12C08F212/08C08F220/54C09D139/06C09D133/06C09D133/20C08F220/58C08L39/06C08L31/04B42D25/36C03C17/3405C03C2217/70C03C2218/116C08J2325/16C08J2333/02C08J2333/26C08J2339/04C08J2339/06C08J2425/16C08J2433/02C08J2433/26C08J2439/04C08J2439/06C08L25/16C08L33/02C08L33/26C08L2203/16C08L2205/025G02B1/005G02B5/286
Inventor 郑瑞现朴钟穆孔好烈裴者英
Owner KOREA RES INST OF CHEM TECH