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Organic-inorganic hybrid anti-fog coating and preparation method thereof

An anti-fog coating, inorganic technology, applied in coatings, anti-fouling/underwater coatings, conductive coatings, etc., can solve the problems of destroying the anti-fog effect of functionalized coatings, reducing surface free energy, etc., to improve self-cleaning ability, lowering resistance value, and the effect of uniform coating performance

Active Publication Date: 2020-08-25
HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the organic-inorganic hybrid polymer anti-fog coating has an ideal anti-fog effect, due to the high surface energy of the polymer, it is easily polluted by dust in the air, resulting in a decrease in the surface free energy, thereby destroying the anti-fog effect of the functionalized coating. fog effect

Method used

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  • Organic-inorganic hybrid anti-fog coating and preparation method thereof
  • Organic-inorganic hybrid anti-fog coating and preparation method thereof
  • Organic-inorganic hybrid anti-fog coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Under the protection of nitrogen, respectively add 30g of acrylic acid, 10g of hydroxyethyl acrylate, 100g of acrylamide, and 5g of vinyltriethoxysilane into a reaction kettle of 200g of isopropanol, stir evenly, and then add 1g of photoinitiator 1- Hydroxycyclohexyl phenyl ketone and 10g of chain transfer agent n-dodecyl mercaptan were stirred until dissolved, and then the system was placed under ultraviolet light for 20-30 minutes to react, and then added dropwise to it and dispersed in isopropanol Hydrophobic monomer methyl methacrylate and ethyl acrylate mixed solution, the dropping rate is controlled at 0.5-1 drop / s, after the addition is completed, the constant temperature reaction is continued for 1-2 hours, after the reaction, the hydrophilic acrylate resin.

[0068] Disperse 10g of tetraethyl orthosilicate (TEOS) in 43g of absolute ethanol, add 3g of glacial acetic acid and stir to mix evenly, add 6g of ionized water dropwise while stirring, hydrolyze at 40°C f...

Embodiment 2

[0071] Under nitrogen protection, add 100g of acrylic acid, 10g of methacrylic acid, 15g of N-hydroxyethylacrylamide, and 5g of γ-methacryloxypropyltrimethoxysilane into a reaction kettle of 200g of absolute ethanol, and stir evenly. Then add 1g photoinitiator 2-hydroxyl-2-methyl-phenylacetone and 10g chain transfer agent sodium methacrylate sulfonate and stir until dissolved, then place the system under ultraviolet light to react for 20-30min, Then dropwise add a mixed solution of hydrophobic monomer methyl methacrylate and ethyl acrylate dispersed in absolute ethanol, the dropping rate is controlled at 0.5-1 drop / s, and after the dropping is completed, continue the constant temperature reaction for 1-2 hours. After the reaction, the hydrophilic acrylate resin is obtained.

[0072] Disperse 15g of tetraethyl orthosilicate (TEOS) in 47g of isopropanol, add 1g of hydrochloric acid and stir to make it evenly mixed, add 4g of ionized water dropwise under stirring, hydrolyze at 40...

Embodiment 3

[0075] Under nitrogen protection, add 80g acrylic acid, 10g ethylacrylic acid, 35g N,N dimethylacrylamide, 15g N-hydroxyethylacrylamide, 5gγ-methacryloxypropyltrimethoxysilane to 200g In the reaction kettle of water ethanol, stir evenly, then add 1g photoinitiator diphenyl-(2,4,6-trimethylbenzoyl)phosphine and 10g chain transfer agent α-methylstyrene linear Stir the dimer until it dissolves, and then place the system under ultraviolet light to react for 20-30 minutes, and then dropwise add a mixed solution of hydrophobic monomer methyl methacrylate and ethyl acrylate dispersed in absolute ethanol, The dropping rate is controlled at 0.5-1 drop / s. After the dropping is completed, the constant temperature reaction is continued for 1-2 hours. After the reaction is completed, the hydrophilic acrylate resin is obtained.

[0076] Disperse 15g of tetraethyl orthosilicate (TEOS) in 47g of isopropanol, add 1g of hydrochloric acid and stir to make it evenly mixed, add 4g of ionized water...

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Abstract

The invention relates to an organic-inorganic hybrid multifunctional super-hydrophilic room-temperature self-crosslinking anti-fog coating and a preparation method thereof. The coating is prepared bymixing 45-60 parts of hydrophilic acrylate resin, 10-30 parts of organic-inorganic hybrid silica sol, 1-5 parts of a crosslinking agent, 1-5 parts of an auxiliary agent and 5-20 parts of a diluent andthen carrying out room-temperature self-curing. The anti-fog coating has the advantages of self-cleaning, static resistance, bacteriostasis, wear resistance, water washing resistance and aging resistance. Meanwhile, the coating is high in adhesive force and good in flexibility, the pencil hardness can reach H-2H, the water contact angle is 3-6 degrees, the light transmittance is larger than or equal to 90%, and the coating can be applied to various glass and plastic transparent base materials such as automobile glass, ocean steamships, glass curtain walls, optical lenses and protective masks.

Description

technical field [0001] The invention relates to the field of water-based coatings, in particular to an organic-inorganic hybrid room temperature self-crosslinking anti-fog coating and a preparation method thereof. Background technique [0002] Transparent substrates (such as glass, plastic, etc.) are more and more widely used in people's daily life, work and production. However, in a high-humidity environment or when there is a temperature difference between the inside and outside of the substrate, many small water droplets will condense on the surface of the transparent substrate, resulting in atomization. The small water droplets will refract and reflect light, resulting in The light transmittance of the material decreases. This not only affects the appearance of the transparent substrate, but also affects the performance of the transparent substrate, and even causes a huge hidden danger to people's life safety. For example, the fogging of the plastic film in the greenho...

Claims

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Application Information

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IPC IPC(8): C09D133/26C09D133/02C09D5/24C09D5/14C09D7/61C08F220/06C08F230/08C08F220/58C08F220/14C08F220/18
CPCC08F220/06C09D5/14C09D5/24C09D143/04C09D7/61C08K3/36C08K5/544C08F230/085C08F220/58C08F220/14C08F220/1802
Inventor 徐常利何禄文张刚李著初文敬文风陈明军
Owner HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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