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Photochromic coating and preparation method thereof

A photochromic and coating technology, applied in the coating field, can solve problems such as the inability to meet more needs of people, and achieve the effects of fast curing speed, good hardness and simple preparation method

Active Publication Date: 2021-04-30
SHANGHAI GANTIAN OPTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are few photochromic coatings applied on walls and furniture, and most of the existing photochromic coatings only have decorative functions and cannot meet people's more needs

Method used

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  • Photochromic coating and preparation method thereof

Examples

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preparation example Construction

[0034] The preparation method of photochromic microcapsules is not particularly limited, and may be interfacial polymerization method, in-situ polymerization method based on melamine-formalin, etc., curing coating method in liquid, phase separation method from aqueous solution, or organic solvent Phase separation method, soluble dispersion cooling method, air suspension coating method, spray drying method, etc. The photochromic microcapsule used in the present invention is the photosensitive microcapsule disclosed in the patent whose publication number is CN109876743A.

[0035] The rare earth powder is at least one of yttrium phosphate, lanthanum phosphate and cerium phosphate. The particle size of the rare earth powder is preferably between 1 and 10 μm, and if it exceeds this particle size range, its dispersibility and stability in the photochromic paint will be affected.

[0036] Rare earths have abundant electronic energy levels. Under the irradiation of ultraviolet and vi...

Embodiment 1

[0048] Take by weighing 20 parts by weight of pentaerythritol tetraacrylate, 15 parts by weight of tetrafunctional polyester acrylate (Guangzhou Handong Trading Co., Ltd., 6325-100), 30 parts by weight of 3 (propoxyl) glycerol triacrylate, light 2.5 parts by weight of chromogenic microcapsules, 10 parts by weight of rare earth powder (yttrium phosphate particles with a particle size of 3-8 μm), porous powder (silicon dioxide particles with a particle size of 3-8 μm, wherein the microporous powder and the medium The mass ratio of hole powder is 1.2:1) 15 weight parts, photoinitiator (benzil dimethyl ketal) 0.5 weight part, photocatalyst (nano TiO 2 ) 1 part by weight and 6 parts by weight of water.

[0049] Mix the rare earth powder and the photocatalyst evenly, then add them into pentaerythritol tetraacrylate, mix and stir evenly, and obtain the mixture A. Add the photochromic microcapsules into the four-functional polyester acrylate, mix and stir evenly, and obtain mixture B...

Embodiment 2

[0052] Take by weighing 15 parts by weight of pentaerythritol tetraacrylate, 15 parts by weight of tetrafunctional polyester acrylate (Meiyuan Special Chemical Co., Ltd., Miramer PS1000), 35 parts by weight of 3 (propoxyl) glycerol triacrylate, photoinduced 2.5 parts by weight of color-changing microcapsules, 5 parts by weight of rare earth powder (lanthanum phosphate particles with a particle size of 3 to 8 μm), porous powder (silicon dioxide particles with a particle size of 3 to 8 μm, wherein the microporous powder and mesoporous The mass ratio of the powder is 1.2:1) 20 parts by weight, 0.5 parts by weight of photoinitiator (benzil dimethyl ketal), 1 part by weight of photocatalyst (nano-ZnO) and 6 parts by weight of water.

[0053] Mix the rare earth powder and the photocatalyst evenly, then add them into pentaerythritol tetraacrylate, mix and stir evenly, and obtain the mixture A. Add the photochromic microcapsules into the four-functional polyester acrylate, mix and sti...

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Abstract

The invention discloses a photochromic coating, which comprises the following raw material components in percentage by weight: 15-25% of pentaerythritol tetraacrylate, 10-20% of tetrafunctional polyester acrylate; 20-35% of 3-(propoxy) glycerol triacrylate; 0.5%-5% of a photochromic microcapsule; 5-15% of rare earth powder; 10%-20% of porous powder; 0.2-3% of a photoinitiator; 0.5-2% of a photocatalyst; and 5-10% of water. The invention also provides a preparation method of the photochromic coating. The photochromic coating provided by the invention not only has good stability, adhesion and hardness, but also has the functions of generating negative ions and regulating humidity, and the photochromic effect can be obtained by adding the photochromic microcapsules; meanwhile, the preparation method of the photochromic coating is simple, photocuring is adopted, the curing speed is high, and the photochromic coating is suitable for mass production and can be widely applied to the fields of buildings and decoration.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a photochromic coating and a preparation method thereof. Background technique [0002] The phenomenon of changing color in response to specific light is called photochromic, and the material that causes this photochromic is called photochromic material (Photochromic, photoreversible color compound or photochromic compound). Photochromic compounds are broadly classified into pigment form and dye form or inorganic form and organic form. Photochromic compounds in solution or dispersion form change from colorless to a specific color when exposed to sunlight or ultraviolet light, and return to their original color when placed in the dark or without strong ultraviolet light. [0003] Reversible photochromic materials can be used in a wide range of applications, such as plastics, inks, coatings, etc. Taking the application in paint as an example, most reversible photochro...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D5/29C09D7/61
CPCC09D167/06C09D5/29C09D7/61C09D7/70C08K2201/005C08K2003/321C08K2003/2241C08K2003/2296C08K2003/2231C08K9/10C08K5/0008C08K3/32C08K7/26C08K3/22
Inventor 甘家安
Owner SHANGHAI GANTIAN OPTICAL MATERIALS
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