Preparation method of hydrophobing agent

A hydrophobic agent and catalyst technology, which is applied in the field of preparation of hydrophobic agents, can solve the problems of film layer structure damage, not being widely used, hydrophobic function failure, etc., to increase reaction density, improve solubility, prevent polymerization and crystallization Effect

Active Publication Date: 2014-08-20
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, nano-glass rainproof coating products for car maintenance also appear on the market, but at present, these products have the disadvantage of poor durability, that is, after a period of use, it can be as long as half a year or as short as a few days, and its hydrophobic function will fail.
The main reason is that the film layer is easily rubbed by solid particles in the air, which leads to the destruction of the film layer structure.
Therefore, hydrophobic coating technology has not been widely used on automotive glass

Method used

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  • Preparation method of hydrophobing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 3g of heptadecafluorodecyltriethoxysilane to 100g of ethanol, then add 2g of 37wt% hydrochloric acid and 1g of distilled water, and stir at room temperature for 120min. Next, 150 g of perfluorotributylamine was added into the system, vigorously stirred for 5 hours at room temperature, and the upper liquid was removed after standing to obtain a hydrophobic agent.

[0024] The hydrophobic agent is coated on the glass surface to form a film by scrape coating, and a hydrophobic film with good durability can be obtained after 24 hours of natural storage.

Embodiment 2

[0026] Add 3g of heptadecafluorodecyltriethoxysilane to 100g of ethyl acetate, then add 2g of acetic acid and 1g of distilled water, and stir at room temperature for 120min. Next, 150 g of perfluorooctane was added into the system, vigorously stirred at room temperature for 20 h, and the upper liquid was removed after standing to obtain a hydrophobic agent.

[0027] The hydrophobic agent is coated on the glass surface to form a film by scrape coating, and a hydrophobic film with good durability can be obtained after 24 hours of natural storage.

Embodiment 3

[0029] Add 3g of heptadecafluorodecyltriethoxysilane to 100g of isopropanol, then add 2g of acetic acid and 1g of distilled water, and stir at room temperature for 120min.

[0030] Next, 150 g of perfluorobutyltetrahydrofuran was added into the system, vigorously stirred at room temperature for 20 h, and the supernatant liquid was removed after standing to obtain a hydrophobic agent.

[0031] The hydrophobic agent is coated on the cleaned glass surface to form a film by scrape coating process, and the hydrophobic film layer with good durability can be obtained after being placed naturally for 24 hours.

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Abstract

The invention relates to a preparation method of a high-durability hydrophobing agent, which comprises the following steps: (1) hydrolysis of long-chain fluoroalkyl low-surface-energy substances: adding long-chain fluoroalkyl low-surface-energy substances, a catalyst and water into an organic solvent, and stirring so that the long-chain fluoroalkyl low-surface-energy substances have the activity of reacting with hydroxy group; and (2) extraction: adding a perfluoro solvent into the system, extracting the hydrolyzed long-chain fluoroalkyl low-surface-energy substances into the perfluoro solvent by utilizing favorable solubility of the long-chain fluoroalkyl low-surface-energy substances in the perfluoro solvent, and removing the supernatant liquid, thereby obtaining the hydrophobing agent. The invention also provides a preparation method of hydrophobic glass with high performance, which comprises the following step: preparation of hydrophobic film layer: coating the hydrophobing agent on the surface of the glass to prepare the hydrophobic film layer, thereby obtaining the hydrophobic glass. The perfluoro solvent can improve the solubility of the long-chain fluoroalkyl low-surface-energy substances and prevent the long-chain fluoroalkyl low-surface-energy substances from polymerization and crystallization; and the perfluoro solvent is hardly dissolved in water, thereby avoiding water in the system, enhancing the reaction density between the long-chain fluoroalkyl low-surface-energy substances and the hydroxy group on the glass surface, and improving the durability of the hydrophobic film layer.

Description

technical field [0001] The invention relates to the field of hydrophobic agent preparation, in particular to a method for preparing a hydrophobic agent with good durability. Background technique [0002] The surface of silicate glass is a high-energy, hydrophilic surface. When water droplets spread randomly on the glass, the light transmission of the glass will deteriorate, which brings a lot of inconvenience to people's life and work. When the car is driving at high speed in rainy days, rainwater and muddy water tend to stick to the surface of the windshield glass or rearview mirror glass, which seriously affects the driver's sight. Even if the wiper is used, there will be many dead spots, which will increase the probability of accidents. For the side windows and rearview mirrors, the wipers can do nothing. [0003] The hydrophobic film layer can prevent rainwater from spreading on the surface, and the water droplets are in the form of a spherical crown on the surface, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/30
Inventor 熊建民洪丽陈大华徐蕤
Owner CHERY AUTOMOBILE CO LTD
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