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Anti-counterfeiting ink and preparation method thereof, and anti-counterfeiting pattern layer and preparation method thereof

A technology of anti-counterfeiting ink and magnetized pattern, applied in the field of anti-counterfeiting, can solve the problems of uneven distribution of magnetic photonic crystals, poor effect, troublesome operation, etc.

Active Publication Date: 2021-09-21
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual process, it was found that due to the uneven distribution of the magnetic photonic crystals in the capsule ink, the effect of the integrated anti-counterfeiting layer prepared by the capsule ink is very poor in the later division of color blocks.
In addition, the anti-counterfeiting layer prepared in the form of capsules needs to be excited by a magnetic field to develop color during anti-counterfeiting detection, which makes the operation more troublesome.

Method used

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  • Anti-counterfeiting ink and preparation method thereof, and anti-counterfeiting pattern layer and preparation method thereof
  • Anti-counterfeiting ink and preparation method thereof, and anti-counterfeiting pattern layer and preparation method thereof
  • Anti-counterfeiting ink and preparation method thereof, and anti-counterfeiting pattern layer and preparation method thereof

Examples

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Embodiment 1

[0089] This embodiment provides an anti-counterfeiting ink, the anti-counterfeiting ink comprises magnetic photonic crystals and a curable composition, and the magnetic photonic crystals are evenly dispersed in the curable composition. Wherein, the magnetic photonic crystal is a monodisperse magnetic colloidal nanoparticle or a magnetic photonic nanochain or a mixture of a monodisperse magnetic colloidal nanoparticle and a magnetic photonic nanochain that can change color or develop color in a curable composition; curable The composition contains an epoxy compound and a cationic initiator, and the content of the cationic initiator is 1% to 12% of the epoxy compound; the epoxy compound is any one or a mixture of any of the resins, and the resin is an alicyclic Epoxy resin or acrylic resin; cationic initiators are diphenyl-(4-phenylthio)phenylsulfonium hexafluorophosphate, diphenyl-(4-phenylthio)phenylsulfonium hexafluoroantimonate, at least one of diaryliodonium salts.

[0090...

Embodiment 2

[0099] This embodiment provides an anti-counterfeiting ink. In addition to the technical features of the above-mentioned embodiments, this embodiment also includes the following technical features:

[0100] The curable composition also includes a photoinitiator.

[0101] In this embodiment, photoinitiators are also called photosensitizers or photocuring agents, which are a class of energy that can absorb certain wavelengths of energy in the ultraviolet region (250 nm to 420 nm) or visible light region (400 nm to 800 nm) to generate free groups, cations, thereby initiating monomer polymerization, crosslinking and curing compounds. Ultraviolet light is invisible light, which is a section of electromagnetic radiation other than visible violet light, with a wavelength range of 10 nanometers to 400 nanometers. Photoinitiators are added to the anti-counterfeiting ink, and after absorbing the high-intensity ultraviolet light in the ultraviolet light curing equipment, active free ra...

Embodiment 3

[0103] This embodiment provides an anti-counterfeiting ink. In addition to the technical features of the above-mentioned embodiments, this embodiment also includes the following technical features:

[0104] The photoinitiator is α-hydroxyisobutyrophenone.

[0105] In this example, α-hydroxyisobutyrophenone is commonly known as photoinitiator 1173, photoinitiator UV1173, and its molecular formula is C 1 0H 12 o 4 , a high-efficiency photoinitiator used in UV curing systems, makes the anti-counterfeiting ink convert from liquid to solid in a shorter time, and provides the efficiency of anti-counterfeiting ink from liquid to solid.

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Abstract

The invention provides anti-counterfeiting ink and a preparation method thereof, and an anti-counterfeiting pattern layer and a preparation method thereof. The anti-counterfeiting ink comprises magnetic photonic crystals and a curable composition, the magnetic photonic crystals are uniformly dispersed in the curable composition, and the anti-counterfeiting ink is prepared by the following method: dispersing the magnetic photonic crystals in a liquid of the curable composition to obtain a mixed liquid; and stirring the mixed solution to obtain the anti-counterfeiting ink. The magnetic photonic crystals are uniformly dispersed in the curable composition, so that the anti-counterfeiting ink shows color change and light rolling and dynamic effects in a magnetic field through the magnetic photonic crystals, and the anti-counterfeiting effect is enhanced.

Description

technical field [0001] The application belongs to the field of anti-counterfeiting technology, in particular, it relates to anti-counterfeiting ink and a preparation method thereof, an anti-counterfeiting layer and a preparation method thereof. Background technique [0002] Public anti-counterfeiting technology generally means that materials can display different characteristic patterns or colors under different viewing angles or light sources without the help of external instruments and equipment, so as to achieve anti-counterfeiting purposes. The color of the reflected light of the optically variable ink (also known as the optically variable ink) under the irradiation of white light shows different color changes with the change of the viewing angle, thus showing the excellent anti-counterfeiting performance that is difficult to be copied by scanners and color copiers. Currently recognized as the highest anti-counterfeiting security ink in the world. However, at present, t...

Claims

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Application Information

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IPC IPC(8): C09D11/50C09D11/101C09D11/03
CPCC09D11/50C09D11/101C09D11/03
Inventor 刘东官建国罗巍李刚李春芝马会茹赵红梅杨秀菊
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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