Aqueous fluorine-containing acrylate modified polyurethane coating, preparation method and application thereof
A polyurethane coating and acrylate technology, applied in the coating and other directions, can solve the problems of no obvious improvement in the hydrophobicity of the film, no obvious improvement in the water resistance of the polyurethane film, and the long fluorocarbon chain is harmful, and achieves improved mechanical properties, Excellent surface properties, good stability
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Embodiment 1
[0028] In a 500mL four-neck flask equipped with a stirrer, reflux condenser, thermometer and feeding device, add 9.975g of polyether polyol (NJ-330), 0.9907g of dimethylolpropionic acid (DMPA) and 15g of N-methylpyrrolidone (NMP) solvent, heat the system to 60°C, add 5.55g of isophorone diisocyanate (IPDI), dropwise add 0.075g of catalyst dibutyltin dilaurate (T-12), and stir for 30min Finally, raise the temperature of the system to 70°C (if the viscosity of the system is too high, add a certain amount of acetone), continue the reaction for 3 hours, then lower the temperature to 60°C, add 3.25g of hydroxyethyl methacrylate (HEMA), and react for 4 hours Afterwards, the temperature was lowered to 30°C, 0.9810g of triethylamine was added, reacted for 0.5h, and 58.3248g of deionized water was added dropwise for dispersion. After 0.5h, 4.5g of reactive diluent butyl hexafluoroacrylate ( FA), after 30min, the temperature was raised to 40°C, 0.2g thermal initiator azobisisobutyronitr...
Embodiment 2
[0030] In a 500mL four-neck flask equipped with a stirrer, reflux condenser, thermometer and feeding device, add 12.03g of polyether polyol (NJ-330), 0.8864g of dimethylolpropionic acid (DMPA) and 15g of N-methylpyrrolidone (NMP) solvent, heat the system to 60 ° C, add 5.55 g of isophorone diisocyanate (IPDI), drop 0.05 g of catalyst dibutyltin dilaurate (T-12), After stirring for 30 minutes, raise the temperature of the system to 70°C (if the viscosity of the system is too high, add a certain amount of acetone), continue the reaction for 3 hours, then lower the temperature to 60°C, and add 3.25g of hydroxyethyl methacrylate (HEMA) After 4 hours of reaction, lower the temperature to 30°C, add 0.8776g of triethylamine, react for 0.5h, add 64.2695g of deionized water dropwise for dispersion, and after 0.5h, add 1.125g of reactive diluent six to the prepolymer Fluorobutyl acrylate (FA), after 30 minutes, the temperature was raised to 40 °C, 0.2 g of thermal initiator azobisisobut...
Embodiment 3
[0032]In a 500mL four-neck flask equipped with a stirrer, reflux condenser, thermometer and feeding device, add 12.03g of polyether polyol (NJ-330), 0.8864g of dimethylolpropionic acid (DMPA) and 15g of N-methylpyrrolidone (NMP) solvent, heat the system to 60 ° C, add 5.55 g of isophorone diisocyanate (IPDI), drop 0.05 g of catalyst dibutyltin dilaurate (T-12), After stirring for 30 minutes, raise the temperature of the system to 70°C (if the viscosity of the system is too high, add a certain amount of acetone), continue the reaction for 3 hours, then lower the temperature to 60°C, and add 3.25g of hydroxyethyl methacrylate (HEMA) After 4 hours of reaction, lower the temperature to 30°C, add 0.8776g of triethylamine, react for 0.5h, add 64.2695g of deionized water dropwise for dispersion, and add 2.25g of reactive diluent hexafluoro to the prepolymer after 0.5h Butyl acrylate (FA), after 30min, the temperature was raised to 40°C, 0.2g of thermal initiator azobisisobutyronitril...
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