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Double-component hydrophobing agent and application thereof

A hydrophobic agent and two-component technology, applied in the field of hydrophobic agent preparation, can solve the problems of film layer structure damage, not widely used, hydrophobic function failure, etc., to increase reaction density, improve solubility, prevent polymerization and crystallization effect

Inactive 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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  • Double-component hydrophobing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 5g of tetraethyl orthosilicate to 80g of ethanol, then add 10g of distilled water, stir at room temperature for 60min, at the same time add 2g of 37wt% hydrochloric acid to 20g of ethanol, stir at room temperature for 60min, then slowly add the acid alcohol solution to the orthosilicon In the ethyl acetate solution, after the dropwise addition was completed, stir at room temperature for 120 min to obtain Component A.

[0017] 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 to the system, vigorously stirred for 5 hours at room temperature, and the upper liquid was removed after standing to obtain component B.

[0018] The components A and B are coated successively on the glass surface to form a film by scraping process, and the hydrophobic film layer with good durability can be obtained after bei...

Embodiment 2

[0022] Add 3g of ethyl orthosilicate to 80g of ethyl acetate, then add 15g of distilled water, stir at room temperature for 60min, at the same time add 1.5g of 37wt% hydrochloric acid to 20g of ethyl acetate, stir at room temperature for 60min, then slowly drop the acid solution Add it to tetraethyl orthosilicate solution, and after the dropwise addition, reflux and stir at 70°C for 30 minutes to obtain component A.

[0023] 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 component B.

[0024] The components A and B are coated successively on the glass surface to form a film by scraping process, and the hydrophobic film layer with good durability can be obtained after being placed naturally for 24...

Embodiment 3

[0026] Add 3g tetraethyl orthosilicate to 80g isopropanol, then add 15g distilled water, stir at room temperature for 60min, at the same time add 1.5g37wt% hydrochloric acid to 20g isopropanol, stir at room temperature for 60min, then slowly drop the acid solution Add it to tetraethyl orthosilicate solution, and after the dropwise addition, reflux and stir at 70°C for 30 minutes to obtain component A.

[0027] 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. Then, 150 g of perfluorobutyl tetrahydrofuran was added to the system, vigorously stirred at room temperature for 20 h, and the supernatant liquid was removed after standing to obtain a hydrophobic agent.

[0028] Use the wiping process to coat components A and B successively on the cleaned glass surface to form a film, and leave it for 24 hours to obtain a durable hydrophobic film.

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Abstract

The invention discloses a double-component hydrophobing agent and application thereof. The hydrophobing agent contains a component A and a component B, wherein the component A is a hydroxy-rich ethyl orthosilicate hydrolysis solution; and the component B is a perfluoro solvent solution in which long-chain fluoroalkyl silane is dissolved. By adopting the double-component formula, after the component A, which is the hydroxy-rich ethyl orthosilicate hydrolysis solution, reacts with the glass surface, the hydroxy content of the glass surface can be enhanced, thereby increasing the active reaction sites with low-surface-energy substances; the component B is the perfluoro solvent solution in which long-chain fluoroalkyl low-surface-energy silane is dissolved, and the perfluoro solvent can improve the solubility of the long-chain fluoroalkyl low-surface-energy silane, thereby preventing polymerization and crystallization; and the perfluoro solvent is hardly soluble in water, thereby avoiding water in the system and enhancing the reaction density between the long-chain fluoroalkyl low-surface-energy substances and the hydroxy group on the glass surface. The double-component formula can greatly enhance 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 hydrophobic agent with good durability and its application. 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] At present, Toyota Camry, Mazda Ruiyi, Volvo V70 and other models are equipped with hydrophobic coating technology on the front door side windows and exterior mir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34C03C17/30
Inventor 熊建民徐蕤洪丽陈大华秦玉林
Owner CHERY AUTOMOBILE CO LTD
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