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Color fluorescent anti-counterfeiting invisible ink powder and preparation method thereof

A fluorescent and toner technology, which is applied in the field of toner manufacturing, can solve the problems of adverse effects on printing performance, single tone of excitation light, and weak anti-counterfeiting reliability, and achieve excellent fluorescent anti-counterfeiting characteristics, wide application prospects, and improved anti-counterfeiting reliability. Effect

Active Publication Date: 2014-03-19
SHENZHEN LEPUTAI TECH CO LTD
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Problems solved by technology

This method avoids the influence of the pH of the system on the fluorescent pigment during the coagulation process, but the fluorescent pigment is easily released from the surface of the toner or external additives, which has a negative impact on the printing performance
[0006] On the other hand, the documents printed by the colorless anti-counterfeiting toner provided in more patent documents of colorless anti-counterfeiting toner need to excite different hues of fluorescence under different ultraviolet wavelengths to realize its anti-counterfeiting function. The excitation light has a single tone, such as only monotonous red or green fluorescence, which is not only troublesome to use, high in cost, but also low in technical content, easy to imitate, and weak in anti-counterfeiting reliability

Method used

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  • Color fluorescent anti-counterfeiting invisible ink powder and preparation method thereof

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preparation example Construction

[0033] see figure 1 , the present invention also provides the preparation method of the above-mentioned fluorescent anti-counterfeiting invisible toner, comprising the steps of:

[0034] (1) Dissolve the colorless fluorescent agent, wax, charge control agent and additives according to the ratio, and disperse them in the toner resin monomer to form a monomer oil phase;

[0035] (2) Add the above-mentioned monomer oil phase to the aqueous dispersion liquid, and after high-speed shear suspension granulation, transfer to the reactor, and perform the first temperature-rising polymerization reaction to obtain nuclear layer fluorescent toner particles;

[0036] (3) Using the above-mentioned toner particles as the core layer, adding cationic monomers and water-soluble initiators for the second polymerization reaction, so that the outer surface of the toner particles is evenly distributed with a densely charged surface layer;

[0037] (4) The product after the second polymerization re...

Embodiment 1

[0058] 81 parts of styrene, 19 parts of n-butyl acrylate, 0.6 parts of divinylbenzene, 1.0 parts of n-dodecanethiol, 2 parts of positive charge control agent, 8 parts of ester wax, colorless red fluorescent dye DFSB- 1.2 parts of C7 (manufactured by Risk Reactor), 0.8 parts of colorless blue fluorescent dye DFSB-C0 (manufactured by Risk Reactor), and the above components were dissolved and mixed uniformly at room temperature through a grinding disperser to prepare a monomer oil phase.

[0059] In addition, an aqueous solution of 100 parts of deionized water dissolved in 13 parts of magnesium chloride was slowly added to an aqueous solution of 200 parts of deionized water dissolved in 8.3 parts of sodium hydroxide, dispersed at high speed for 1 hour, and then ultrasonically matured at room temperature for 4 hours to obtain magnesium hydroxide suspension Dispersions.

[0060] Then 2 parts of methyl methacrylate and 0.2 part of dimethyl diallyl ammonium chloride were dispersed in...

Embodiment 2

[0063] Change 1.2 parts of the colorless red fluorescent dye DFSB-C7 (manufactured by Risk Reactor) to 0.8 parts in Example 1, and change 0.8 parts of the colorless blue fluorescent dye DFSB-C0 (manufactured by Risk Reactor) to colorless green Fluorescent dye DFSB-K43 (manufactured by Risk Reactor) 1.2 parts, other operations are consistent with Example 1. The obtained yellow light (Y) invisible anti-counterfeiting toner characteristic evaluation results are shown in Table 1.

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Abstract

The invention discloses color fluorescent anti-counterfeiting invisible ink powder and a preparation method thereof. The color fluorescent anti-counterfeiting invisible ink powder comprises ink powder resin, a colorless fluorescent agent, wax, a charge control agent and an additive, wherein the ink power resin, the wax, the charge control agent and the additive are all colorless materials; the ink powder resin is a homopolymer or copolymer of monovinyl monomers; the colorless fluorescent agent is a colorless fluorescent mixture capable of emitting cyan light or pinkish red light or yellow light under excitation of ultraviolet light and obtained by compounding colorless fluorescent compounds capable of emitting visible red light or green light or blue light under the excitation of ultraviolet light with wavelength of 365nm; and the colorless fluorescent mixture, the wax, the charge control agent and the additive account for 0.1-20%, 1-30%, 0.1-5% and 0.5-5% of the weight of the monovinyl monomer, respectively. The color fluorescent anti-counterfeiting invisible ink powder disclosed by the invention can truly display the color image of the manuscript under ultraviolet light and is colorless and invisible under natural light; and therefore, the ink can be used for printing colorful anti-counterfeiting images and texts and is capable of greatly improving the anti-counterfeiting reliability.

Description

【Technical field】 [0001] The invention relates to the field of toner manufacturing, in particular to a colorless chemical toner used in color fluorescent anti-counterfeiting in imaging equipment and a preparation method. 【Background technique】 [0002] In order to meet the rapid development of science and technology, the level of office automation and informatization has been greatly improved, printer anti-counterfeiting technology has emerged as the times require, so that the printer can automatically print important bills, vouchers, signatures and seals of archives, etc., greatly improving the traditional manual operation. work efficiency. Ultraviolet fluorescent anti-counterfeiting toner is made by adding fluorescent compounds to toner, and the ultraviolet fluorescent colorless toner is made by adding corresponding invisible ultraviolet fluorescent compounds to toner. The text printed with ultraviolet fluorescent colorless toner is invisible or light-colored under ordina...

Claims

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Application Information

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IPC IPC(8): G03G9/09G03G9/08G03G9/097
Inventor 张媛媛刘志军蒲甜甜羊辉李绍昌
Owner SHENZHEN LEPUTAI TECH CO LTD
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