A kind of waterborne acrylic fluorescent paint and preparation method thereof

Abstract

The invention provides a water-based acrylic fluorescent paint and a preparation method thereof. The preparation method comprises the following steps: preparing a silica-coated modified phosphor powder; adding the silica-coated modified phosphor powder to an aqueous solvent Stir in medium to obtain a modified phosphor suspension, add the modified phosphor suspension to the emulsion containing acrylate monomers, and add an initiator to react, adjust the pH value to 6.5-7.5, and obtain stable nano-SiO 2 / acrylate composite emulsion; the composition of emulsion B includes methyl methacrylate, and the composition of emulsion C includes n-butyl acrylate; the obtained nano-SiO 2 / Acrylic ester composite emulsion is uniformly mixed with a curing agent and an auxiliary agent to obtain a water-based acrylic fluorescent paint. The technical solution of the present invention uses silicon dioxide to coat the modified fluorescent powder, uses the modified fluorescent powder as the core, and the acrylate copolymer as the shell, which not only enhances the luminous performance of the fluorescent powder, but also improves the stability of the emulsion.

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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