Water-based acrylic fluorescent coating and preparation method thereof

A technology of water-based acrylic and fluorescent coatings, applied in the field of coatings, can solve problems such as complex synthesis process, environmental pollution, uneven luminescence, etc., and achieve the effects of good optical transparency, convenient process adjustment, and improved adhesion

Active Publication Date: 2020-01-07
广西经正科技开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Water-based acrylic fluorescent coating and preparation method thereof
  • Water-based acrylic fluorescent coating and preparation method thereof
  • Water-based acrylic fluorescent coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A water-based acrylic fluorescent paint, which is prepared by the following steps:

[0052] 1. Modified phosphor powder coated with silica.

[0053] Weigh one part of tetraethyl orthosilicate, dissolve it in 1.5 parts of ethanol and 3 parts of water, adjust the pH value to 3~4 with hydrochloric acid, heat and stir at 40°C for 30 minutes to form a transparent sol, mix 2 parts of fluorescent powder Immerse in the sol, stir at 50°C for 60 minutes, adjust the pH value to 6-7 with ammonia water, wait for complete gelation, place in an oven at 100°C for drying, calcinate at 400°C for 4 hours, cool and grind.

[0054] 2. Preparation of aqueous acrylic fluorescent emulsion.

[0055] Mix 10 parts of absolute ethanol and 60 parts of water, add 6 parts of modified phosphor powder while stirring, and stir for 30 minutes for later use; add 1 / 2 phosphor powder suspension To the turbid liquid, add 0.5-1 part of NaHCO3 and 0.4-0.5 part of sodium lauryl sulfate, stir mechanically for ...

Embodiment 2

[0061] A water-based acrylic fluorescent paint, which is prepared by the following steps:

[0062] 1. Modified phosphor powder coated with silica.

[0063] With embodiment 1.

[0064] 2. Preparation of aqueous acrylic fluorescent emulsion.

[0065] In the steps of Example 1, the phosphor suspension was added all at once at the beginning, instead of being divided into two parts.

[0066] 3. Preparation of fluorescent paint.

[0067] With embodiment 1.

[0068] In this embodiment, the fluorescent powder suspension in step 2 is added in one step.

Embodiment 3

[0070] A kind of acrylic fluorescent paint, it adopts the following steps to prepare:

[0071] 1. Modified phosphor powder coated with silica.

[0072] Weigh one part of tetraethyl orthosilicate, dissolve it in 1.5 parts of ethanol and 3 parts of water, adjust the pH value to 3~4 with hydrochloric acid, heat and stir at 40°C for 30 minutes to form a transparent sol, mix 2 parts of fluorescent powder Immerse in the sol, stir at 50°C for 60 minutes, adjust the pH value to 6-7 with ammonia water, wait for complete gelation, place in an oven at 100°C for drying, calcinate at 400°C for 4 hours, cool and grind.

[0073] 2. Preparation of aqueous acrylic fluorescent emulsion.

[0074] Add pre-emulsified emulsion A (3 parts of methyl methacrylate, 4 parts of water, 0.04 part of potassium persulfate, 0.05 part of sodium lauryl sulfate) in a three-necked flask equipped with stirring, condensing reflux tube and thermometer, After reacting for half an hour, the temperature was raised to...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/16C09D133/12C09D5/22C09D5/16
CPCC09D5/1662C09D5/22C09D143/04
Inventor 黄映恒何灿农毅梁瑶莹王露甲王智军勾玖均李燕
Owner 广西经正科技开发有限责任公司
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