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Method for preparing antifogging transparent coating from modified silane coupling agent and hydrophilic copolymer

A hydrophilic copolymer, silane coupling agent technology, applied in coatings, polyether coatings, etc., can solve problems affecting the normal use of optical equipment, inconvenience, turbidity, etc., achieve high transparency and mechanical properties, improve resistance Abrasion and adhesion, good anti-fog effect

Pending Publication Date: 2022-03-18
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the refraction and scattering of light, the originally transparent material becomes cloudy, leading to the problem of fogging, which affects the normal use of optical equipment, such as glasses and windshields, and brings inconvenience to people's lives

Method used

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  • Method for preparing antifogging transparent coating from modified silane coupling agent and hydrophilic copolymer
  • Method for preparing antifogging transparent coating from modified silane coupling agent and hydrophilic copolymer
  • Method for preparing antifogging transparent coating from modified silane coupling agent and hydrophilic copolymer

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Synthesis of hydrophilic polymer: 9.10g (0.07mol) hydroxyethyl methacrylate, 0.72g (0.01mol) acrylic acid, 1.11g (0.01mol) N-vinylpyrrolidone and 1.42g (0.01mol) ) Glycidyl methacrylate (GMA) was mixed evenly, and 9.00 g (0.1 mol) of 2-ethoxyethanol solution was added, and stirred evenly. About 15 minutes after nitrogen gas was introduced, 0.06 g (0.000365 mol) of azobisisobutyronitrile was added, the temperature was kept at 80° C., and the reaction was carried out for about 4 hours.

[0029] (2) Synthesis of polyethylene glycol modified silane coupling agent: mix 11.61g (0.058mol) polyethylene glycol 200 and 0.08g (0.000127mol) dibutyltin dilaurate, dissolve in 8g (0.11mol) tetrahydrofuran , dispersed evenly, slowly added 14.36g (0.058mol) isocyanate propyltriethoxysilane dropwise, stirred at 25°C for 24h, and removed the solvent with a rotary evaporator at 40°C, then added dropwise 4.03g (0.019mol) ) TEOS and 0.02g (0.00022mol) 1-methoxy-2-propanol, add 0.5mL ace...

Embodiment 2

[0034] (1) Synthesis of hydrophilic polymer: 13.66g (0.105mol) hydroxyethyl methacrylate, 1.08g (0.015mol) acrylic acid, 1.66g (0.015mol) N-vinylpyrrolidone and 2.13g (0.015mol) ) Glycidyl methacrylate (GMA) was mixed evenly, and 10.00 g (0.11 mol) of 2-ethoxyethanol solution was added, and stirred evenly. About 15 minutes after nitrogen gas was introduced, 0.093 g (0.000564 mol) of azobisisobutyronitrile was added, the temperature was kept at 80° C., and the reaction was carried out for about 4 hours.

[0035] (2) Synthesis of polyethylene glycol modified silane coupling agent: mix 21.48g (0.027mol) polyethylene glycol 800 and 0.08g (0.000127mol) dibutyltin dilaurate, dissolve in 9g (0.125mol) tetrahydrofuran , dispersed evenly, slowly added 6.64g (0.027mol) isocyanate propyltriethoxysilane dropwise, stirred at 25°C for 24h, and removed the solvent with a rotary evaporator at 50°C, then added dropwise 1.87g (0.0089mol) ) TEOS and 0.03g (0.00033mol) 1-methoxy-2-propanol, add ...

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Abstract

The invention discloses a method for preparing an anti-fog transparent coating from a modified silane coupling agent and a hydrophilic copolymer, and belongs to the technical field of anti-fog coatings. The preparation method comprises the following steps: firstly, preparing a hydroxyl-containing hydrophilic copolymer, modifying a silane coupling agent by using polyethylene glycol with different molecular weights, and blending to form the organic-inorganic hybrid anti-fog coating. On one hand, polyethylene glycol shows excellent hydrophilicity and flexibility, the wear resistance and the adhesive force can be improved by adding the silane coupling agent, the formula of the coating is optimized by using an experimental method of modifying the silane coupling agent by polyethylene glycol, and the coating also shows excellent mechanical properties and high transparency besides good anti-fog performance; on the other hand, by using polyethylene glycol with different molecular weights, along with the increase of the molecular weight and the elongation of a molecular chain, the formation of a three-dimensional network structure is facilitated, and the structure can enhance the mechanical properties such as hydrophilicity and wear resistance, and can be applied to the anti-fog field of optical devices, such as display screens, lenses, automobiles and building glass; the material is a good anti-fog optical material.

Description

technical field [0001] The invention relates to a method for preparing an anti-fog transparent coating with a modified silane coupling agent and a hydrophilic copolymer, and belongs to the technical field of anti-fog coatings. Background technique [0002] At certain temperatures or humidity, water vapor may condense on solid surfaces to form a mist. Due to the refraction and scattering of light, the originally transparent material becomes cloudy, leading to the problem of fogging, which affects the normal use of optical equipment, such as glasses and windshields, and brings inconvenience to people's lives. [0003] Organic-inorganic hybrid hydrophilic anti-fog coating is a new and effective anti-fog coating with excellent anti-fog ability and mechanical properties. Among them, organic components provide hydrophilicity, and inorganic components ensure mechanical properties. Hybrid coatings can combine the advantages of both, which has great research value. However, how to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/14C09D171/02
CPCC09D133/14C08L2201/10C08L71/02
Inventor 姚伯龙陈欢王宇通倪亚洲程广鸿张晋瑞王海潮
Owner JIANGNAN UNIV
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