A kind of high temperature resistant anti-ultraviolet hydrophobic coating and preparation method thereof
A water-repellent coating, anti-ultraviolet technology, applied in the direction of coating, can solve the problem of not considering the degradation of coatings by nano-titanium dioxide, and achieve the effects of good anti-ultraviolet performance, good water-repellent performance, simple equipment and process
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Embodiment 1
[0020] Add 10 parts of nano-titanium dioxide and 0.5 parts of BYK180 to 100 parts of absolute ethanol, add 5mm zirconium beads, and disperse at high speed in a sand mill disperser for 2 hours to obtain a dispersion of nano-titanium dioxide;
[0021] Mix the above dispersion with 100 parts of silicone, add 0.8 parts of curing agent at the same time, and continue to disperse into a uniform coating;
[0022] Coat the silicone / titanium dioxide coating on the glass sheet by spin coating, dry at 70°C for 1 min, cool to room temperature naturally, then spin coat a layer of titanium dioxide dispersion, and then place it in an oven at 70°C for drying.
[0023] The prepared coating has good water-repellent performance. After continuous irradiation under ultraviolet light for 24 hours, and placed in a muffle furnace at 450°C for 3 hours, the surface does not change, and the performance remains unchanged.
Embodiment 2
[0025] Add 15 parts of nano-titanium dioxide and 0.8 parts of BYK180 to 100 parts of absolute ethanol, add 5mm zirconium beads, and disperse at a high speed in a sand mill disperser for 2.5 hours to obtain a dispersion of nano-titanium dioxide;
[0026] Mix the above dispersion with 100 parts of silicone, add 0.8 parts of curing agent at the same time, and continue to disperse into a uniform coating;
[0027] Apply the silicone / titanium dioxide coating on the glass sheet by spin coating, dry at 70°C for 1min, cool to room temperature naturally, then spin coat the titanium dioxide dispersion, repeat the coating of the titanium dioxide dispersion twice, and then place it in an oven at 70°C Dry in medium.
[0028] The prepared coating has good water-repellent performance. After continuous irradiation under ultraviolet light for 24 hours, and placed in a muffle furnace at 450°C for 3 hours, the surface does not change, and the performance remains unchanged.
Embodiment 3
[0030] Add 20 parts of nano-titanium dioxide, 1 part of BYK180 and 1 part of KH550 to 100 parts of absolute ethanol, add 5mm zirconium beads, and disperse at a high speed in a sand mill disperser for 2 hours to obtain a dispersion of nano-titanium dioxide;
[0031] Mix the above dispersion with 100 parts of silicone, add 0.8 parts of curing agent at the same time, and continue to disperse into a uniform coating;
[0032] Coat the silicone / titanium dioxide coating on the glass sheet by spin coating, dry at 70°C for 1 min, cool to room temperature naturally, then spin coat a layer of titanium dioxide dispersion, and then place it in an oven at 70°C for drying.
[0033] The prepared coating has good water-repellent performance. After continuous irradiation for 24 hours under the ultraviolet lamp, it is placed in a muffle furnace at 450°C for 3 hours, without any change on the surface, and the performance remains unchanged.
[0034] Table 1 UV transmittance and contact angle of th...
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