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Hydrophobic paint, and preparation method thereof

A hydrophobic coating and hydrophobic modification technology, applied in the field of coatings, can solve the problems of loss of hydrophobic effect, decrease of hydrophobic performance, poor interfacial bonding force, etc., to solve unstable super-hydrophobic performance, stable super-hydrophobic performance, and solve wear resistance poor effect

Pending Publication Date: 2018-11-30
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The film-forming substances used in existing hydrophobic products are all composed of low surface energy substances, most of which contain fluorine, which makes the bonding force of the interface poor and cannot be used for a long time. Moreover, the hydrophobic performance drops significantly during multiple freezing-melting cycles. Some coatings have poor wear resistance, and the particles are easy to fall off the surface and lose the hydrophobic effect

Method used

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  • Hydrophobic paint, and preparation method thereof
  • Hydrophobic paint, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 2 g of perfluorooctyltriethoxysilane to 98 g of ethanol solution, adjust the pH value to less than 7 with 36% acetic acid by mass fraction, and stir for 24 h;

[0033] Add TiO with 20nm particle size 2 and TiO with a particle size of 200nm 2 A total of 10g, stirred for 4h, centrifuged for 50min, dried for 24h to obtain fluorosilane hydrophobically modified TiO 2 Particles, denoted as FAS-TiO 2 ;

[0034] Add FAS-TiO to 50mL xylene and 50mL ethyl acetate mixed solution 2 , 6g dispersant BYK-110, 50g silicone modified polyurethane and 9g N75 curing agent;

[0035] Stir for 30 minutes, adjust the viscosity to 15Pa·s, and prepare the superhydrophobic coating;

[0036] The superhydrophobic coating is sprayed or brushed on the substrate surface to obtain a superhydrophobic surface, and the water contact angle, abrasion resistance and surface tension are tested.

Embodiment 2

[0038] Add 6 g of perfluorodecyltriethoxysilane to 194 g of ethanol solution, adjust the pH value to less than 7 with 38% acetic acid by mass fraction, and stir for 20 h;

[0039] Add TiO with 15nm particle size 2 and TiO with a particle size of 250nm 2 A total of 12g, stirred for 6h, centrifuged for 40min, dried for 22h to obtain fluorosilane hydrophobically modified TiO 2 Particles, denoted as FAS-TiO 2 ;

[0040] Add FAS-TiO to 85mL xylene and 85mL ethyl acetate mixed solution 2 , 30g dispersant BYK-161, 40g silicone modified polyurethane and 9g N75 curing agent;

[0041] Stir for 50min, adjust the viscosity to 20Pa·s, and prepare the superhydrophobic coating;

[0042] The superhydrophobic coating is sprayed or brushed on the substrate surface to obtain a superhydrophobic surface, and the water contact angle, abrasion resistance and surface tension are tested.

Embodiment 3

[0044] Add 8 g of perfluorooctyltriethoxysilane to 392 g of ethanol solution, adjust the pH value to less than 7 with 37% acetic acid by mass fraction, and stir for 23 h;

[0045] Add 30nm TiO 2and TiO with a particle size of 150nm 2 A total of 12g, stirred for 5h, centrifuged for 30min, and dried for 20h to obtain fluorosilane hydrophobically modified TiO 2 Particles, denoted as FAS-TiO 2 ;

[0046] Add FAS-TiO to a solution of 180 mL xylene and 180 mL ethyl acetate 2 , 40g dispersant BYK-163, 60g silicone modified acrylic resin and 9g N75 curing agent;

[0047] Stir for 60min, adjust the viscosity to 18Pa·s, and prepare the superhydrophobic coating;

[0048] The superhydrophobic coating is sprayed or brushed on the substrate surface to obtain a superhydrophobic surface, and the water contact angle, abrasion resistance and surface tension are tested.

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Abstract

The invention provides a hydrophobic paint with a water contact angle larger than 150 DEG, and a preparation method thereof. The preparation method comprises following steps: perfluorooctyltriethoxysilane is added into an alcohol solution, the pH value is adjusted to be lower than 7 with acetic acid, an obtained mixture is stirred; TiO2 is added, stirring, centrifugation, and drying are carried out so as to obtain fluoroalkyl silane hydrophobic modified TiO2 particles; the fluoroalkyl silane hydrophobic modified TiO2 particles, a dispersant, a modified resin, and a curing agent are added intoa xylene and ethyl acetate solution; an obtained mixed material is stirred, and the viscosity is adjusted so as to obtain the hydrophobic paint. The hydrophobic paint is stable in performance; introduction of inorganic particles is capable of improving paint layer wear resistance; and at the same time, introduction of low surface energy fluoroalkyl silane is capable of reducing paint surface tension further.

Description

technical field [0001] The invention relates to the field of coatings, more specifically, to a hydrophobic coating and a preparation method thereof. Background technique [0002] Icing and frosting widely exist in refrigeration systems (such as anti-icing of air conditioners), power transmission lines, surfaces of fan blades, surfaces of building exterior walls, and surfaces of aircraft (such as surfaces of wings, air intakes, and windshields), etc. The existence of the ice (frost) layer reduces the heat transfer rate of the equipment and increases the pressure loss, which has a greater impact on the system; the surface of the fan blade needs to withstand the erosion of various natural factors such as strong wind, sand, rain, frost, ultraviolet radiation, and high-speed The abrasion of operation; the anti-icing performance of transmission lines, building exterior wall surfaces, aircraft surfaces, etc. is also crucial. [0003] The film-forming substances used in existing hy...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D133/00C09D7/62
CPCC08K9/06C08K2003/2241C08K2201/011C08K2201/014C09D133/00C09D175/04C08L33/00C08K3/22C08L75/04
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH
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