Waterborne invisible fluorescent anti-counterfeiting ink as well as preparation method and application method thereof

An anti-counterfeiting ink and fluorescence technology, applied in the field of ink, can solve the problems of reducing the anti-counterfeiting effect, polluting the environment, hidden safety hazards, etc., achieving the effects of no explosion risk, increased anti-counterfeiting performance, and improved safety.

Inactive Publication Date: 2018-10-26
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the fluorescent anti-counterfeiting inks that have been developed are as follows: first, they absorb in the visible light region, causing them to show a certain degree of color under sunlight, which reduces their anti-counterfeiting effect; The molecules are all oil-soluble, and only volatile and toxic organic solvents (such as dichloromethane, chloroform, tetrahydrofuran,

Method used

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  • Waterborne invisible fluorescent anti-counterfeiting ink as well as preparation method and application method thereof
  • Waterborne invisible fluorescent anti-counterfeiting ink as well as preparation method and application method thereof
  • Waterborne invisible fluorescent anti-counterfeiting ink as well as preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0058] The present invention also provides a method for preparing the above-mentioned water-based invisible fluorescent anti-counterfeiting ink, which includes the following steps:

[0059] The water-based resin, the surfactant, and the dye aqueous solution are mixed and ultrasonically processed to obtain the water-based invisible fluorescent anti-counterfeiting ink.

[0060] Wherein, the time of the ultrasonic treatment is 2 to 5 minutes, preferably 3 minutes.

[0061] The present invention also provides a method for using the above water-based invisible fluorescent anti-counterfeiting ink, which includes the following steps:

[0062] Coating or printing the above water-based invisible fluorescent anti-counterfeiting ink on the surface of the product and drying to obtain the anti-counterfeiting product;

[0063] The anti-counterfeiting product cannot see the traces and colors of the water-based invisible fluorescent anti-counterfeiting ink on the surface under sunlight, and under ultra...

Example Embodiment

[0066] Example 1

[0067] Will have the structural formula:

[0068] (B1)

[0069] Aqueous dye solution (10% of the total mass of the ink, mass concentration 5g / L), aqueous acrylic resin solution (87% of the total mass of the ink), and polyvinylpyrrolidone (3% of the total mass of the ink) are mixed uniformly Ultrasound for 3 minutes to obtain water-based invisible blue fluorescent anti-counterfeiting ink; apply it to cigarette packaging cardboard. After the moisture is dry, the ink traces and colors on the cardboard cannot be seen under ordinary sunlight. Under ultraviolet light, the cardboard will jam. Shows strong blue fluorescence ( figure 1 with figure 2 ). Its emission wavelength is 435nm ( Figure 5 ), the quantum yield is 81%. figure 1 The photos of the water-based invisible fluorescent anti-counterfeiting inks of Examples 1 to 3 under sunlight (top) and ultraviolet light (bottom), figure 2 Photographs of the water-based invisible fluorescent anti-counterfeiting ink of E...

Example Embodiment

[0071] Example 2

[0072] Will have the structural formula:

[0073] (G1)

[0074] Aqueous dye solution (10% of the total mass of the ink, mass concentration 5g / L), aqueous acrylic resin solution (87% of the total mass of the ink), and polyvinylpyrrolidone (3% of the total mass of the ink) are mixed uniformly Ultrasound for 3 minutes to obtain water-based invisible green fluorescent anti-counterfeiting ink; apply it to cigarette packaging cardboard. After the moisture is dry, the ink traces and colors on the cardboard cannot be seen under ordinary sunlight. Under ultraviolet light, the cardboard will be Show strong green fluorescence ( figure 1 with image 3 ). Its emission wavelength is 485nm ( Figure 5 ), the quantum yield is 88%. See figure 1 with image 3 , figure 1 The photos of the water-based invisible fluorescent anti-counterfeiting inks of Examples 1 to 3 under sunlight (top) and ultraviolet light (bottom), image 3 The photos of the water-based invisible fluorescent an...

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Abstract

The invention provides waterborne invisible fluorescent anti-counterfeiting ink as well as a preparation method and an application method thereof. Fluorescent molecules in a used dyestuff water solution are not absorbed in a visible light region, so that the ink is colorless and transparent under a common sunlight condition and is completely invisible, and can display bright fluorescent light under ultraviolet irradiation, and furthermore, the contrast ratio and the anti-counterfeiting safety are improved; meanwhile, the waterborne invisible fluorescent anti-counterfeiting ink system providedby the invention takes water as a dissolution carrier; compared with previous oily dyestuffs, the waterborne invisible fluorescent anti-counterfeiting ink is safe and nontoxic, no volatile organic gasis generated and no pollution is caused; the consumption of resources is reduced and the environment protection cost is reduced; the ink has no burning and explosion risks and the safety of a workingenvironment is improved; furthermore, the waterborne invisible fluorescent anti-counterfeiting ink provided by the invention has a fluorescent color so that the problem that the color of a current fluorescent anti-counterfeiting dyestuff is single is overcome.

Description

technical field [0001] The invention belongs to the technical field of inks, and in particular relates to a water-based invisible fluorescent anti-counterfeiting ink, a preparation method and a use method thereof. Background technique [0002] At present, anti-counterfeiting inks can be divided into non-fluorescent anti-counterfeiting inks and fluorescent anti-counterfeiting inks according to their anti-counterfeiting functions. Among them, non-fluorescent anti-counterfeiting inks include thermochromic inks (such as heat-responsive polymer-polyethylene diacetylene materials), photochromic inks (such as azobenzene materials, spiropyran materials), magnetic color-changing inks (such as Ferrocene materials), moisture-sensitive color-changing inks (such as siloxane materials), chemical reaction color-changing inks (such as acid-base and indicator reactions, redox or enzyme reaction-induced color-changing inks), the synthesis of such inks is often very difficult Complexity, high...

Claims

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Application Information

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IPC IPC(8): C09D11/50C09D11/037C09D11/107C09D11/102C09D11/108C09D11/105C09D11/104C09D11/103
CPCC09D11/037C09D11/102C09D11/103C09D11/104C09D11/105C09D11/107C09D11/108C09D11/50
Inventor 张国庆张学鹏廖凡
Owner UNIV OF SCI & TECH OF CHINA
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