Preparation of water dispersed fine emulsion of fluorine acrelate copolymer for anti-oil and anti-water agent
A technology of perfluoroacrylate and water-repellent agent, which is applied in the field of preparation of water-dispersed miniemulsion of perfluoroacrylate copolymer for oil-repellent and water-repellent agent. Fast, low-dose effect
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Embodiment 1
[0022] The perfluoroalkyl acrylate (perfluorocarbon number is 6, 8, 10) 12g, lauryl methacrylate 4g, dodecyl mercaptan 0.1g, potassium persulfate 0.1g, styrene 6g, acrylamide 0.2g, 0.3g of dodecyl-3-methylammonium bromide, 0.2g of OP-9 and 45g of deionized water were mixed, stirred and pre-emulsified at 40°C for 10 minutes, and then the pre-emulsion was ultrasonically fined at this temperature After 5 minutes of emulsification, the average particle size of the monomer miniemulsion was 121nm.
[0023] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring blade, a thermometer, a reflux tube, and a nitrogen venting device. The gas in the flask was replaced with nitrogen. The temperature was raised to 65°C with stirring, and the polymerization was initiated for 6 hours to obtain a blue light. The translucent emulsion has an average particle size of 117nm, a molecular weight of 110,000, a solid content of 32%, and a monomer conversion rate of 97%.
Embodiment 2
[0025] Combine 10 g of perfluoroalkyl acrylate (perfluorocarbon number 6, 8, 10), 6 g of cetyl methacrylate, 0.1 g of dodecyl mercaptan, 0.1 g of azobisacetonitrile, and benzene Mix 4g of ethylene, 0.2g of acrylic acid, 0.21g of cetyl-3-methylammonium bromide, 0.24g of NP-40 and 45g of deionized water, stir and pre-emulsify at 40℃ for 10 minutes, and then at this temperature The pre-emulsion was subjected to ultrasonic fine emulsification for 5 minutes, and the average particle size of the monomer miniemulsion was 128 nm.
[0026] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring blade, a thermometer, a reflux tube, and a nitrogen venting device. The gas in the flask was replaced with nitrogen, and the temperature was raised to 75°C under stirring. The polymerization was initiated for 6 hours to obtain a blue light. The translucent emulsion has an average particle size of 125nm and a molecular weight of 100,000, the solid content of the emulsion i...
Embodiment 3
[0028]Combine 8 g of perfluoroalkyl acrylate (perfluorocarbon number 6, 8, 10), 6 g of stearyl methacrylate, 0.1 g of dodecyl mercaptan, 0.12 g of ammonium persulfate, and methyl methacrylate. 4g of ester, 0.3g of acrylamide, 0.18g of dodecyl-3-methylammonium bromide, 0.36g of OP-10 and 40g of deionized water were mixed, stirred and pre-emulsified at 40℃ for 10 minutes, and then at this temperature The pre-emulsion was subjected to ultrasonic fine emulsification for 3 minutes, and the average particle size of the monomer fine emulsion was 116 nm.
[0029] Then put the monomer emulsion in a 100ml four-necked flask equipped with a stirring blade, a thermometer, a reflux tube, and a nitrogen venting device. The gas in the flask was replaced with nitrogen, and the temperature was raised to 70°C under stirring. The polymerization was initiated for 6 hours to obtain a blue light. The translucent emulsion has an average particle size of 113nm, a molecular weight of 98,000, a solid conten...
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