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Water-based fluorescent ink as well as preparation method and application thereof

A fluorescent ink, water-based technology, applied in applications, chemical instruments and methods, inks, etc., can solve the problems of inability to achieve anti-counterfeiting encryption printing, short service life, low fluorescence intensity, etc., achieve excellent anti-counterfeiting ability, improve accuracy, and fluorescence intensity. high effect

Active Publication Date: 2021-01-12
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the fluorescent molecules used in fluorescent inks are all oil-soluble, have poor stability, and have safety and environmental protection problems. At present, they are often used in offset printing to produce two-dimensional codes, but the accuracy is low and the anti-counterfeiting ability is poor.
Although the quantum dot ink can avoid the safety and environmental protection problems caused by the use of oily solvents, its service life is short and the fluorescence intensity is low. In the prior art, rare earth elements are usually used to increase its fluorescence intensity; currently inkjet printers can be used Printing, but the pattern accuracy is low, and it cannot realize large-format ultra-high-precision patterned anti-counterfeiting encrypted printing

Method used

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  • Water-based fluorescent ink as well as preparation method and application thereof
  • Water-based fluorescent ink as well as preparation method and application thereof
  • Water-based fluorescent ink as well as preparation method and application thereof

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preparation example Construction

[0045] The present invention also provides the preparation method of the water-based fluorescent ink described in the above technical scheme, comprising the following steps:

[0046] (1) mixing polystyrene microspheres with an organic solvent and a fluorescent dye to obtain a fluorescent solution;

[0047] (2) mixing the fluorescent solution obtained in the step (1) with a surfactant and water to obtain a homogeneous system;

[0048] (3) removing the organic solvent from the homogeneous system obtained in the step (2) to obtain a water-based fluorescent ink.

[0049] The invention mixes polystyrene microspheres with an organic solvent and a fluorescent dye to obtain a fluorescent solution.

[0050] In the present invention, the organic solvent is preferably toluene or benzene, more preferably toluene. In a preferred solution of the present invention, the toluene is less toxic.

[0051] In the present invention, the mass ratio of the polystyrene microspheres to the organic s...

Embodiment 1

[0066] In terms of mass content, the composition of the water-based fluorescent ink is: polystyrene microspheres 0.12%, fluorescent dye 0.012% (the mass content of PFO in the fluorescent dye is 100%, and the mass content of F8BT is 0%), sodium lauryl sulfate 0.5% % and water 99.368%.

[0067] M of PFO in this embodiment n 14311 Dalton, M w 19222 Daltons, MP 15292 Daltons, M z 25990 Daltons, M z+1 It is 34439 Daltons, and the polydispersity is 1.343157; the M of F8BT n 23064 Dalton, M w 48197 Daltons, MP 34516 Daltons, M z 108578 Dalton, M z+1 is 206211 Daltons with a polydispersity of 2.089722.

[0068] The preparation method of water-based fluorescent ink in the present embodiment is:

[0069] (1) 0.1g polystyrene microspheres were dissolved in 9.9g toluene, the mass ratio of polystyrene microspheres to toluene was 1:99, and 0.01g fluorescent dye (PFO) was added to obtain a fluorescent solution;

[0070] (2) Add 0.07 g of sodium lauryl sulfate to 14 g of water, then ...

Embodiment 2

[0073] PFO mass content is 99% (0.0099g) in the fluorescent dye, and F8BT mass content is 1% (0.0001g), and other is identical with embodiment 1, obtains water-based fluorescent ink S 3-2 .

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Abstract

The invention provides water-based fluorescent ink as well as a preparation method and application thereof, and belongs to the technical field of anti-counterfeiting ink. The water-based fluorescent ink provided by the invention comprises the following components in percentage by weight: 0.10%-0.14% of polystyrene microspheres, 0.010%-0.014% of fluorescent dye, 0.4%-0.6% of a surfactant and the balance of water. According to the invention, the polystyrene microspheres are used as a fluorescent dye carrier, are colorless, transparent and completely invisible under common sunlight, only show fluorescence under ultraviolet irradiation and have high fluorescence intensity, and the surfactant enables the polystyrene fluorescent microspheres to be uniformly dispersed in the fluorescent ink, so that the stability of the fluorescent ink is improved; water is used as a solvent, and has good safety and environmental friendliness; the precision of a printed pattern can reach 30 microns, large-breadth ultrahigh-precision patterned anti-counterfeiting encryption printing can be realized, one object and one code can be realized by precisely printing a two-dimensional code, and the anti-counterfeiting capability is excellent.

Description

technical field [0001] The invention relates to the technical field of anti-counterfeiting inks, in particular to a water-based fluorescent ink and its preparation method and application. Background technique [0002] With the continuous development of the global economy, counterfeit goods appear frequently, causing serious economic losses every year. In order to distinguish the authenticity of goods, the most effective and convenient method is to use anti-counterfeiting technology to achieve identification. Fluorescent anti-counterfeiting is one of the most widely used anti-counterfeiting technologies at present. Fluorescent anti-counterfeiting ink is an ink for printing invisible anti-counterfeiting marks, text, images and other content for the needs of product anti-counterfeiting and important document anti-counterfeiting. It is distinguished by excitation light, including ultraviolet anti-counterfeiting , Infrared anti-counterfeiting, etc. Among them, ultraviolet anti-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/328C09D11/30C09D11/38
CPCC09D11/328C09D11/30C09D11/38C09K11/06C09D11/106C09D11/50C09D125/06C08K5/42C08L25/06C08L2205/18C09K2211/1416C09K2211/1483
Inventor 冯欢欢王敏蒋坤坤张月月张振超赵维巍马星张嘉恒郑婷婷
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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