Water-based acrylic fluorescent coating and preparation method thereof

Abstract

The invention provides a water-based acrylic fluorescent coating and a preparation method thereof. The preparation method comprises the following steps: preparing silicon dioxide coated modified fluorescent powder; adding the obtained silicon dioxide coated modified fluorescent powder into a water-based solvent and stirring to obtain modified fluorescent powder suspension; adding the modified fluorescent powder suspension into an emulsion containing an acrylate monomer, adding an initiator, carrying out a reaction, and adjusting the pH value to 6.5-7.5 to obtain a stable nano SiO2 / acrylate composite emulsion, wherein the component of the emulsion B comprises methyl methacrylate, and the component of the emulsion C comprises n-butyl acrylate; and uniformly mixing the obtained nano SiO2 / acrylate composite emulsion with a curing agent and an auxiliary agent to obtain the water-based acrylic fluorescent coating. The silicon dioxide is adopted to coat and modify fluorescent powder, the modified fluorescent powder is used as a core, and the acrylate copolymer is used as a shell, so that the luminescence property of the fluorescent powder is enhanced, and the stability of the emulsion isimproved.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a water-based acrylic fluorescent coating and a preparation method thereof. Background technique [0002] The current methods for preparing fluorescent paints include: (1) synthesizing resins with fluorescent effects, and using the fluorescent properties of the resin itself to emit light; (2) adding fluorescent powder as a filler to prepare fluorescent paints. The first method has a complicated preparation process, strict requirements on process conditions, and uses a large amount of organic solvents, and the residual organic solvents will pollute the environment. The second method has a relatively simple process, but there are problems in the dispersion of phosphor powder, which will cause uneven luminescence and local fluorescence quenching. [0003] In the current published literature, there are some research contents about fluorescent coatings, such as Chinese patent CN2015...

AI Technical Summary

Problems solved by technology

The first method has a complex preparation process, strict requirements on process conditions, and uses a large amount of organic solvents, and the residual organic solvents will pollute the environment

The second method is relatively simple in process, but there are problems in the dispersion of phosphor powder, which will cause uneven luminescence and local fluorescence quenching

[0003] In the current published literature, there are some research contents about fluorescent coatings, such as Chinese patent CN201510614889.7 A preparation method of acrylic fluorescent coatings Although fluorescent coatings are obtained, the coatings do not have low surface energy, anti-fouling and self-cleaning properties

Chinese Patent CN201710283423.2 A Polyacrylate / Polyurethane Fluorescent Paint and Its Preparation Method The luminescent substrate of the fluorescent paint disclosed is a fluorescent resin, the synthesis process is relatively complicated, and a large amount of organic solvents are used in the synthesis process, which is not conducive to environmental protection

Chinese patent CN201410545977.1 Nano antibacterial low surface energy organic silicon luminous antifouling coating and its preparation method, the disclosed fluorescent coating is a solvent-based organic silicon coating, wherein the solvent is ketones, aromatic hydrocarbons and alcohols, which is not conducive to environmental protection; and Its fluorescence is energy storage afterglow fluorescence, not excited fluorescence. The average contact angle disclosed in this patent is about 110°, and its surface energy needs to be further improved.

[0004] For the preparation process of fluorescent coatings, the addition of phosphors is coated with organic matter, but experiments have found that organic matter coating will cause agglomeration problems in the process of preparing coatings, which is not conducive to uniform dispersion, resulting in fluorescent luminous intensity. and inefficient

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