Preparation method of fluorine-containing polyacrylate soap-free emulsion
A technology of polyacrylate and soap-free emulsion, applied in the direction of coating, etc., can solve the problems of restriction, latex particle collision, easy flocculation, etc., achieve the effects of improving stability and storage stability, improving adhesion, and overcoming easy migration
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Embodiment 1
[0014] Example 1: 1) First, mix 63% of butyl acrylate, 27% of methyl methacrylate and 10% of hexafluorobutyl acrylate uniformly by mass percentage to prepare mixed monomers;
[0015] 2) Next, add the deionized water of 200% of mixed monomer quality, 4% emulsifier PAA-b-PHFBA (M n It is 2066, PDI is 1.31), 0.27% initiator ammonium persulfate, 1.2% sodium bicarbonate and 1 / 4 part of mixed monomer, nitrogen reaction while stirring for 30 minutes;
[0016] 3) Then the temperature of the mixture in step 2) was raised to 78°C, and the initiator ammonium persulfate aqueous solution of 0.53% of the mass of the mixed monomer was added by a peristaltic pump within 102 minutes and the remaining 3 / 4 part of the mixed monomer was added, and the monomer was added Finally, react at 85°C for 120 minutes to complete the reaction, cool down to 45°C, and discharge to obtain a fluorine-containing polyacrylate soap-free emulsion with a solid content of 24.48%, a conversion rate of 81.17%, and a la...
Embodiment 2
[0017] Example 2: 1) First, mix 60% of butyl acrylate, 30% of methyl methacrylate and 10% of hexafluorobutyl acrylate uniformly by mass percentage to prepare mixed monomers;
[0018] 2) Next, add the deionized water of 200% of mixed monomer quality, 3.5% emulsifier PAA-b-PHFBA (M n 2066, PDI is 1.31), 0.4% initiator ammonium persulfate, 1.26% sodium bicarbonate and 1 / 4 part of mixed monomers, nitrogen reaction while stirring for 30 minutes;
[0019] 3) Then heat up the mixture of step 2) to 80°C, and simultaneously add 0.8% initiator ammonium persulfate aqueous solution and the remaining 3 / 4 part of the mixed monomer with a peristaltic pump within 95 minutes, and the monomer is added Finally, react at 85°C for 120 minutes to complete the reaction, cool down to 45°C, and discharge to obtain a fluorine-containing polyacrylate soap-free emulsion with a solid content of 28.70%, a conversion rate of 95.79%, and a latex particle size of 77.62nm.
Embodiment 3
[0020] Example 3: 1) First, mix 48% butyl acrylate, 50% methyl methacrylate and 2% hexafluorobutyl acrylate uniformly by mass percentage to prepare mixed monomers;
[0021] 2) Next, add the deionized water of 200% of mixed monomer quality, 2% emulsifier PAA-b-PHFBA (M n 2805, PDI is 1.18), 0.5% initiator potassium persulfate, 1.31% sodium bicarbonate and 1 / 4 part of mixed monomer, nitrogen reaction while stirring for 30 minutes;
[0022] 3) Then the mixture in step 2) is warmed up to 82°C, and the initiator potassium persulfate aqueous solution with a mass of 0.84% of the mixed monomer is added with a peristaltic pump within 87 minutes and the remaining 3 / 4 part of the mixed monomer is added, and the monomer is added Finally, react at 87°C for 100 minutes to complete the reaction, cool down to 45°C, and discharge to obtain a fluorine-containing polyacrylate soap-free emulsion with a solid content of 28.62%, a conversion rate of 95.50%, and a latex particle size of 138.3nm.
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