Preparation method of nano ZnO modified polyacrylate emulsion composite coating
A polyacrylate emulsion and composite coating technology, applied in the field of composite coatings, can solve the problems of easy loss of viscosity at high temperature, limited application prospects, and lack of development of polyacrylate, and achieve the effect of environmental protection and simple process
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[0020] like figure 1 As shown, Example 1: the preparation method of the nano-ZnO modified polyacrylate emulsion composite coating, comprising the following steps:
[0021] A total of 81.2 g of nano-ZnO and 80 g of deionized water were added to the beaker, and the nano-ZnO accounted for 2% of the total mass of the monomer, followed by ultrasonic emulsification for 5 min. After the emulsification was completed, 27.84 g of methyl methacrylate, 27.84 g of butyl acrylate, 0.24 g of acrylic acid, and 2.4 g of hydroxyethyl acrylate were added, and an ultrasonic cleaner was used for sonication for 30 min.
[0022] Transfer the sonicated emulsion to a four-necked flask equipped with a thermometer, a reflux condenser and a power-enhancing electric mixer, stir for 10 min at a speed of 1000 r / min, and then dropwise add potassium persulfate aqueous solution (0.48 g of Potassium persulfate was dissolved in 1 / 3 of 34.29g of water), the temperature was controlled at 80°C, and the remaining 1...
Embodiment 2
[0023] Example 2: A total of 81.8 g of nano-ZnO and 80 g of deionized water were added to a beaker, and the nano-ZnO accounted for 2% of the total mass of the monomer, followed by ultrasonic emulsification for 5 min. After the emulsification, 27.87 g of methyl methacrylate, 29.83 g of butyl acrylate, 0.3 g of acrylic acid, and 3.6 g of hydroxyethyl acrylate were added, and an ultrasonic cleaner was used for sonication for 15 min.
[0024] Transfer the sonicated emulsion to a four-necked flask equipped with a thermometer, a reflux condenser and a power-enhancing electric mixer, stir at a speed of 1000 r / min for 10 min, and then dropwise add potassium persulfate aqueous solution (0.6 g of Potassium persulfate was dissolved in 1 / 3 of 42.86g of water), the temperature was controlled at 78 ° C, the remaining 1 / 3 was added every one hour, and the reaction was carried out for a total of 5 hours. Finally, the temperature was cooled and the material was filtered.
Embodiment 3
[0025] Example 3: A total of 82.4 g of nano-ZnO and 80 g of deionized water were added to a beaker, and the nano-ZnO accounted for 4% of the total mass of the monomer, followed by ultrasonic emulsification for 15 minutes. After the emulsification, 20.69 g of methyl methacrylate, 31.03 g of butyl acrylate, 0.36 g of acrylic acid, and 4.8 g of hydroxyethyl acrylate were added, and an ultrasonic cleaner was used for sonication for 10 min.
[0026] Transfer the sonicated emulsion to a four-necked flask equipped with a thermometer, a reflux condenser and a power-enhancing electric mixer, stir at a speed of 1000 r / min for 10 min, and then dropwise add potassium persulfate aqueous solution (0.72 g of Potassium persulfate was dissolved in 1 / 3 of 51.43 g of water), the temperature was controlled at 78°C, and the remaining 1 / 3 was added every hour for a total of 5 hours of reaction. Finally, the temperature was cooled, and the material was filtered and discharged.
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