A kind of photochromic microsphere, preparation method and application

Abstract

The invention discloses a photochromic microsphere, a preparation method and an application thereof, and relates to the technical field of rare earth anti-counterfeiting inks. The invention uses styrene as a raw material to prepare polystyrene microsphere seeds, and through surface modification of the polystyrene microsphere seeds, the surface of the microspheres has amino / carboxyl groups, and the coordination between amino / carboxyl groups and rare earth ions , introducing rare earth ions to the surface of microspheres, thereby solving the problem of precipitation and delamination of existing anti-counterfeiting inks. Through the preparation method of the photochromic microsphere provided by the invention, a photochromic microsphere with high fluorescence, stable properties, good gloss, good printing effect, non-toxic and harmless can be obtained. The preparation method has simple and high-efficiency synthesis process, cheap and easy-to-obtain raw materials, reduces production cost and does not pollute the environment, and has high market application value.

Description

A kind of photochromic microsphere, preparation method and application technical field The present invention relates to rare earth anti-counterfeiting ink technical field, relate in particular to a kind of photochromic microsphere, preparation method and application use. Background technique [0002] In 1950, Dame and Company Ltd first used fluorescent pigments in inks to form practical products. close Over the years, with the in-depth research on organic fluorescent dyes, it has been found that coumarins, naphthalene dimethylimide derivatives, phthalide storages, tons Compounds such as ketones, thionones, and thionones have photosensitizing effects. Zhang Wenguan of Beijing Institute of Graphic Printing and others used synthetic fluorescent agents The organic anti-counterfeiting fluorescent ink prepared with 2-(4-methoxyphenyl)-3,1-benzoxazinazol-4 ketone produces a Produces strong blue fluorescence, which can be used for anti-counterfeiting printing. Yang Jiang ...

AI Technical Summary

Problems solved by technology

[0004] The current rare earth anti-counterfeiting ink is to directly disperse the synthesized rare earth complex powder into the ink linking material. However, it mainly has the following disadvantages: 1. The cost of the rare earth complex in the common anti-counterfeiting ink prepared at present is relatively high. The amount is large, that is, it is not economical and not environmentally friendly; 2. Due to the process and cost, the polymer resin materials used in the current anti-counterfeiting inks have less strict requirements on the particle size distribution, that is, the particle size distribution is wider, so that the prepared poor ink performance

3. The dispersion of rare earth complex solids in the ink binder is relatively poor. Precipitation and stratification of rare earth complexes in the prepared ink will cause ink fluidity and stability to decrease, and printing cracks and unevenness will appear, which is not conducive to processing and storage.

4. It cannot meet the needs of various printing processes (offset printing, screen printing, etc.)