Color fluorescent anti-counterfeiting invisible toner and preparation method
A fluorescent and toner technology, applied in the field of toner manufacturing, can solve the problems of adverse effects on printing performance, single excitation light tone, weak anti-counterfeiting reliability, etc. Effect
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[0037] see figure 1 , the present invention also provides the preparation method of the above-mentioned fluorescent anti-counterfeiting invisible toner, comprising the steps of:
[0038] (1) Dissolve the colorless fluorescent agent, wax, charge control agent and additives according to the proportion, and disperse them in the toner resin monomer to form a monomer oil phase;
[0039] (2) adding the above-mentioned monomer oil phase into 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;
[0040] (3) Using the above-mentioned toner particles as the core layer, adding a cationic monomer and a water-soluble initiator to carry out the second polymerization reaction, so that the outer surface of the toner particles is evenly distributed with a densely charged surface layer;
[0041] (4) The product after the sec...
Embodiment 1
[0062] 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.
[0063] 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.
[0064] Then 2 parts of methyl methacrylate and 0.2 part of dimethyl diallyl ammonium chloride were dispersed in...
Embodiment 2
[0067] 1.2 parts of the colorless red fluorescent dye DFSB-C7 (manufactured by Risk Reactor) in Example 1 are changed to 0.8 parts, and 0.8 parts of the colorless blue fluorescent dye DFSB-C0 (manufactured by Risk Reactor) are changed to colorless green light Fluorescent dye DFSB-K43 (manufactured by Risk Reactor) 1.2 parts, other operations are consistent with Example 1. Table 1 shows the evaluation results of the properties of the obtained yellow light (Y) invisible anti-counterfeiting toner.
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