Aqueous silicon dioxide-fluorinated acrylate polyurethane ultraviolet-curing coating, preparation method and application thereof

[0043] Example 1

[0044] In a container equipped with a stirring device, add 29.44g of absolute ethanol, 20.8g of ethyl orthosilicate (TEOS) at room temperature and stir evenly, then slowly drop 68.4g of deionized water containing 0.5355g of nitric acid into the container, and adjust the temperature The temperature was raised to 70°C and reacted for 3 hours. After the sol was cooled, 23.8351g of N,N-dimethylformamide (DMF) was added, and the stirring was continued for 30 minutes to obtain TEOS sol.

[0045] Add 12.03g of polyether polyol (NJ-330), 0.8864g of dimethylolpropionic acid (DMPA) and 15g of polyether polyol (NJ-330) into a 500mL four-necked flask equipped with a stirrer, reflux condenser, thermometer and feeding device. N-methylpyrrolidone (NMP) solvent, heat the system to 60℃, add 5.55g isophorone diisocyanate (IPDI), add 0.05g catalyst dibutyltin dilaurate (T-12) dropwise, stir for 30min After that, the temperature of the system was increased to 70°C, and the reaction was continued for 3 hours; the temperature was reduced to 60°C, 3.25g of hydroxyethyl methacrylate (HEMA) was added, the temperature was reduced to 40°C after the reaction for 4 hours, and 0.8776g of triethylamine was added. After reacting for 0.5h, 64.2695g deionized water was added dropwise for dispersion. After 0.5h, 1.125g reactive diluent butyl hexafluoroacrylate (FA) and 1.125g trimethylolpropane triacrylate (TMPTA) were added to the prepolymer. ), after 4h reaction, keep the temperature at 40~50℃, add 1.58g of γ-methacryloxypropyltrimethoxysilane (KH-570), stir for 1h, add the above-prepared to the system Ethyl orthosilicate (TEOS) sol 3.16g; keep stirring for 12h to get water-based SiO 2 -Fluorinated acrylate polyurethane light-curing prepolymer; add photoinitiator 2-hydroxy-2-methyl-1-phenylacetone (Darocure 1173) 4.36g to the prepared prepolymer, stir for 30min, and prepare Waterborne SiO 2 -Fluorinated acrylic polyurethane light-curing coating (hby-1).

[0046] Example 2

[0047] In a container equipped with a stirring device, add 29.44g of absolute ethanol, 20.8g of ethyl orthosilicate (TEOS) at room temperature and stir evenly, then slowly drop 68.4g of deionized water containing 0.5355g of nitric acid into the container, and adjust the temperature The temperature was raised to 70°C and reacted for 3 hours. After the sol was cooled, 23.8351g of N,N-dimethylformamide (DMF) was added, and the stirring was continued for 30 minutes to obtain TEOS sol.

[0048] Add 9.975g of polyether polyol (NJ-330), 0.9907g of dimethylolpropionic acid (DMPA) and 15g of dimethylolpropionic acid (DMPA) into a 500mL four-necked flask equipped with a stirrer, reflux condenser, thermometer and feeding device. N-methylpyrrolidone (NMP) solvent, heat the system to 60℃, add 5.55g isophorone diisocyanate (IPDI), add 0.05g catalyst dibutyltin dilaurate (T-12) dropwise, stir for 30min After that, the temperature of the system was increased to 70°C, and after the reaction was continued for 3 hours, the temperature was reduced to 60°C, 3.25g of hydroxyethyl methacrylate (HEMA) was added, and the temperature was reduced to 40°C after the reaction for 4 hours, and 0.9810g of triethylamine was added. After reacting for 0.5h, 58.3248g deionized water was added dropwise for dispersion. After 0.5h, 1.125g reactive diluent butyl hexafluoroacrylate (FA) and 1.125g trimethylolpropane triacrylate (TMPTA) were added to the prepolymer. ), after 4h reaction, keep the temperature at 40~50℃, add 0.79g of γ-methacryloxypropyltrimethoxysilane (KH-570), stir for 1h, add the above-prepared to the system Ethyl orthosilicate (TEOS) sol 1.5805g; keep stirring for 12h to get water-based SiO 2 -Fluorinated acrylate polyurethane light-curing prepolymer; add photoinitiator 2-hydroxy-2-methyl-1-phenylacetone (Darocure 1173) 4.36g to the prepared prepolymer, stir for 30min, and prepare Waterborne SiO 2 -Fluorinated acrylic polyurethane light-curing coating (hby-2).

[0049] Example 3

[0050] In a container equipped with a stirring device, add 29.44g of absolute ethanol, 20.8g of ethyl orthosilicate (TEOS) at room temperature and stir evenly, then slowly drop 68.4g of deionized water containing 0.5355g of nitric acid into the container, and adjust the temperature The temperature was raised to 70°C and reacted for 3 hours. After the sol was cooled, 23.8351g of N,N-dimethylformamide (DMF) was added and stirred for 30 minutes to obtain TEOS sol.

[0051] Add 9.975g of polyether polyol (NJ-330), 0.9907g of dimethylolpropionic acid (DMPA) and 15g of dimethylolpropionic acid (DMPA) into a 500mL four-necked flask equipped with a stirrer, reflux condenser, thermometer and feeding device. N-methylpyrrolidone (NMP) solvent, heat the system to 60℃, add 5.55g isophorone diisocyanate (IPDI), add 0.05g catalyst dibutyltin dilaurate (T-12) dropwise, stir for 30min After that, the temperature of the system was increased to 70°C, and after the reaction was continued for 3 hours, the temperature was reduced to 60°C, 3.25g of hydroxyethyl methacrylate (HEMA) was added, and the temperature was reduced to 40°C after the reaction for 4 hours, and 0.9810g of triethylamine was added. After reacting for 0.5h, 58.3248g deionized water was added dropwise for dispersion. After 0.5h, 1.125g reactive diluent butyl hexafluoroacrylate (FA) and 1.125g trimethylolpropane triacrylate (TMPTA) were added to the prepolymer. ), after 4h reaction, keep the temperature at 40~50℃, add 3.95g of γ-methacryloxypropyltrimethoxysilane (KH-570), stir for 1h, add the above-prepared to the system Ethyl orthosilicate (TEOS) sol 7.9g; keep stirring for 12h to get water-based SiO 2 -Fluorinated acrylate polyurethane photocurable prepolymer; add 8.64g of photoinitiator 2-hydroxy-2-methyl-1-phenylacetone (Darocure 1173) to the prepared prepolymer, stir for 30min, and prepare Waterborne SiO 2 -Fluorinated acrylic polyurethane light-curing coating (hby-3).