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Organic-silicon modified acrylic acid resin superhydrophilic antifogging coating and preparation method thereof

An acrylic resin and anti-fog coating technology, applied in the fields of coating, climate sustainability, sustainable manufacturing/processing, etc., can solve the problem of coating stability and limited number of repeated use, inability to achieve ultra-low temperature anti-fog, complex preparation process, etc. problem, to achieve the effect of excellent anti-fog performance, strong adhesion and low preparation temperature

Active Publication Date: 2019-01-04
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nevertheless, the preparation of anti-fog coatings still has the following three problems: (1) The preparation process is relatively complicated, involving many synthesis steps and strict condition control; (2) Ultra-low temperature anti-fog cannot be achieved, and the general anti-fog temperature is only As low as -20°C; the effect below -40°C is relatively poor; (3) The stability and repeated use of the coating are limited, and may turn yellow or fail
Molecular stability of anti-fog coatings, anti-fog effect in low-temperature environments, and number of coating repetitions cannot meet actual needs

Method used

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  • Organic-silicon modified acrylic acid resin superhydrophilic antifogging coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The pretreatment primer was 0.05g polyvinyl butyral with 20g absolute ethanol. In a clean environment, the cleaned polycarbonate plexiglass surface is coated with a primer and dried at 80°C for 30 minutes. 4.26g of diethanolamine and 5.76g of glycidyl methacrylate were reacted at 60°C for 3h to obtain solution A. Add 10g of DMF as a solvent, then add methyl methacrylate, butyl acrylate, and γ-methacryloxypropyltrimethoxysilane in a molar ratio of 3:1:2 (4.05g, 1.73g, 6.7g) Put it into a three-necked flask, add 0.04g AIBN, react at 60°C for about 1 hour, add 5.27g hydroxyethyl methacrylate, 2.8g 2-acrylamido-2-methylpropanesulfonic acid, finally add A solution, add the remaining Below 0.05g AIBN. The reaction temperature was 60°C, and the reaction was carried out for 4 hours to prepare the coating. After coating on the PC board, the adhesion of the test coating can reach ISO level 0, the coating is transparent and free of air bubbles and shrinkage, it can achieve anti...

Embodiment 2

[0055]The pretreatment primer was 0.05g polyvinyl butyral with 20g absolute ethanol. In a clean environment, the cleaned polycarbonate plexiglass surface is coated with a primer and dried at 80°C for 30 minutes. Add 4.26g of diethanolamine and 5.76g of glycidyl methacrylate into the flask, and react at 60°C for 3h to obtain solution A. Add 10g of DMF as a solvent, then add methyl methacrylate, butyl acrylate, γ-methacryloxypropyltrimethoxysilane according to the mole ratio of 3mol:1mol:2mol (4.05g, 1.73g, 6.7g) Add 0.04g AIBN to a three-necked flask, react at 60°C for about 1 hour, add 1.76g hydroxyethyl methacrylate, 2.8g 2-acrylamido-2-methylpropanesulfonic acid, and finally add solution A, add The remaining 0.05g AIBN. Keep the temperature at 60°C and react for 4 hours to prepare the coating. After being coated on the PC board, the adhesion of the test paint can reach ISO level 0, the coating is transparent, severe shrinkage in some areas, shrinkage around the PC board, ...

Embodiment 3

[0057] The pretreatment primer was 0.05g polyvinyl butyral with 20g absolute ethanol. In a clean environment, the cleaned polycarbonate plexiglass surface is coated with a primer and dried at 80°C for 30 minutes. Add 4.26g of diethanolamine and 5.76g of glycidyl methacrylate into the flask, and react at 60°C for 3h to obtain solution A. Add 10g of DMF as a solvent, then add methyl methacrylate, butyl acrylate, γ-methacryloxypropyltrimethoxysilane according to the mole ratio of 3mol:1mol:1mol (4.05g, 1.73g, 3.35g) Add 0.04g AIBN to a three-necked flask, react at 60°C for about 1 hour, add 1.76g hydroxyethyl methacrylate, 2.8g 2-acrylamido-2-methylpropanesulfonic acid, and finally add solution A, add The remaining 0.05g AIBN. Keep the temperature at 60°C and react for 4 hours to prepare the coating. After being coated on the PC board, the adhesion of the test paint can reach ISO level 0, the coating is transparent, the coating has a large area of ​​shrinkage, the shrinkage ar...

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Abstract

The invention relates to the field of coating preparation, and discloses an organic-silicon modified acrylic acid resin superhydrophilic antifogging coating and a preparation method thereof. The primary reaction raw materials comprises, by weight, 6.3-10.7% of methymethacrylate, 4.5-7.9% of butyl acrylate, 8.8-15.3% of gamma-methacryloxypropyl trimethoxysilane, 8.1-13.9% functional monomer hydroxyethyl methylacrylate, 16.0-27.0% of the reaction produict of diethanol amine and glycidyl methacrylate 3-(bis(2-hydroxyethyl)amino)-2-hydroxypropyl methacrylate and 7.4-12.8% of 2-acrylamide-2-methylpropionic sulfonic acid, the using amount of the azobisisobutyronitrile is 0.2%-0.4%, and the reaction solvent is N, N-dimethylformamide which takes up the 25.3%-45.6% of the total amount. The coatinghas the advantages of lower preparation temperature, good stability, simple production process, the purpose of energy saving is achieved, invested equipment is less, the coating is transparent leveledand has high adhesion force, -40 DEG C low temperature fog resisting and 80 DEG C high-temperature fog resisting can be achieved, the coating does not wrinkle, there exists no crack, and the coatingcan be repeatedly used for over 100 times.

Description

technical field [0001] The invention relates to an anti-fog paint used on the surface of materials such as transparent optical polycarbonate, in particular to an organosilicon-modified acrylic resin anti-fog paint and a preparation method thereof. Background technique [0002] Polycarbonate material (PC) is a widely used, environmentally friendly, highly transparent colorless or slightly yellow engineering plastic; under low temperature conditions, the surface of the PC board can easily reach the dew point temperature of water vapor, and a layer of water will form on the surface of the PC board. Fog seriously obstructs the line of sight and affects the use. [0003] Aiming at the fogging problem of polycarbonate (PC), a large number of hydrophilic anti-fog coatings have been reported in the literature. Zhao Haiping ( coating Industry, 2017, 47(1): 34~40 ) with methyl methacrylate (MMA), glycidyl methacrylate (GMA), isophorone diisocyanate (IPDI), 2-acrylamide-2-methylpro...

Claims

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Application Information

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IPC IPC(8): C09D133/14C08F220/36C08F220/14C08F220/18C08F230/08C08F220/20C08F220/58
CPCC08F220/36C09D143/04C08F220/14C08F220/1804C08F230/08C08F220/20C08F220/585Y02P20/10
Inventor 刘渝萍郑紫阳王力陈昌国周燕岑远余丹梅李莎李伟胡佳宏
Owner CHONGQING UNIV
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