Wear-resistant super-hydrophobic coating compound

[0045] Example 1

[0046] First, prepare a three-component coating composition with the following formula: (i) 50 g of superhydrophobic nano sol with amino groups, the specific preparation method is as follows: 10 g of tetraethoxysilane is dissolved in 120 ml of isopropanol alcohol , Add 10 g of water and 3 g of ammonia, heat the reaction at 55 ℃ for 4 hours to prepare a monodispersed silica solution; adjust the pH to 3.5, then add 2.5 g of NH 2 (CH 2 ) 2 NH(CH 2 ) 3 Si(OCH 2 CH 3 ) 3 , After stirring for 4 hours at 50 ℃, add 5 g of tridecafluorooctyl triethoxy silane, continue to stir for 5 hours to prepare superhydrophobic sol, (ii) 10 g wear-resistant silicone resin, (iii) 0.4 g curing agent γ -Aminopropyltriethoxysilane. Then, 10 g of wear-resistant silicone resin was added to 50 g of superhydrophobic nanosol with amino groups, stirred for 30 minutes, and 0.4 g of curing agent γ-aminopropyltriethoxysilane was added, and stirring was continued for 10 minutes. Finally, spread on a 7cm*2.5cm glass slide and cure at 80°C for half an hour.

[0047] The cured superhydrophobic coating has good abrasion resistance and hydrophobicity. The contact angle of the superhydrophobic coating of this example was measured by a contact angle measuring instrument as 163.6° (attached figure 1 ), the roll angle is 1°. Under the pressure of a weight of 100 g, grind on 240-mesh sandpaper, 10 cm each time, and the contact angle is 159.3° after 20 repetitions (attached figure 2 ), the contact angle after grinding 40 times is 158.6° (attached image 3 ). The superhydrophobic coating of this example has a pencil hardness of 9H and an adhesion level of 0.

[0048] Example 2

[0049] First, prepare a coating composition with the following formula: (i) Take 50 g of superhydrophobic nano sol with amino groups, the specific preparation method is: dissolve 10 g of tetraethoxysilane in 100 ml of ethanol, and add 10 g Water and 2 g ammonia are heated and reacted at 60℃ for 4 hours to prepare a monodisperse silica solution; adjust the pH to 3.5, then add 3 g NH 2 (CH 2 ) 3 Si(OCH 2 CH 3 ) 3 After stirring for 4 hours at 50°C, 6 g of n-octadecyltriethoxysilane was added, and stirring was continued for 5 hours to obtain a superhydrophobic sol, (ii) 10 g of silicone modified silicone resin (solid content 20%). Then, 10 g of silicone-modified silicone resin was added to 70 g of superhydrophobic nanosol with amino groups and stirred for 30 minutes. Finally, it was coated on a 7 cm*2.5 cm glass slide and cured at 80 ℃ for 0.5 hours.

[0050] After curing, the superhydrophobic coating has good transparency, abrasion resistance and hydrophobicity. Using an ultraviolet spectrophotometer (UV-2501PC) to measure the super-hydrophobic coating in this example, the transmittance was 80%. Under the pressure of a weight of 100 g, the transmittance was not affected by grinding 10 cm on 240 mesh sandpaper. influences. Attached Figure 4 In the photo of the superhydrophobic coating of this example taken by a digital camera, the English letters under the coating are clearly visible, indicating that the transparency of the coating is good. The contact angle of the super-hydrophobic coating of this example is 161.0° (attached Figure 5 ) And the rolling angle is 2°, the contact angle is 159.8° after grinding 10 cm on 240 mesh sandpaper under the pressure of 100 g weight (attached Image 6 ), the roll angle is 3°.

[0051] Example 3

[0052] First, prepare a coating composition with the following formula: (i) 150 g of superhydrophobic nanosol with amino groups, the specific preparation method is as follows: Dissolve 10 g of tetraethoxysilane in 120 ml of isopropanol, and add 10 g water and 3 g ammonia water, heated and reacted at 55℃ for 4 hours to prepare a monodisperse silica solution; adjust the pH to 3.5, then add 2.5 g NH 2 (CH 2 ) 3 Si(OCH 3 ) 3 After stirring for 4 hours at 50 ℃, add 5 g of n-octyltrimethoxysilane, continue to stir for 5 hours to prepare superhydrophobic sol, (ii) 10 g of fluororesin (solid content 50%). Then, 10 g of fluororesin was added to 70 g of superhydrophobic nanosol with amino groups and stirred for 30 minutes. Finally, it was coated on a 7 cm*2.5 cm glass slide and cured at 120°C for 2 hours.

[0053] The cured superhydrophobic coating has good abrasion resistance. The contact angle of the superhydrophobic coating of this example was measured by a contact angle measuring instrument as 162.2° (attached Figure 7 ), the roll angle is 1°. Under the pressure of a weight of 100 g, grind on 240-mesh sandpaper, 10 cm each time, and the contact angle is 160.4° after grinding 25 times (attached Figure 8 ).