反应详情

8.75 g of Rhodacal™ A-246L and 875 g of deionized water were charged to a 3 liter three neck flask equipped with mechanical stirrer and dry ice-acetone condenser. The system was purged with nitrogen for 30 minutes. A monomer emulsion was obtained by mixing 455 g of distilled water, 8.75 g of Rhodacal™ A-246L, 70 g of ethyl acrylate, 14 g of itaconic acid, 616 g of vinylidene chloride and 13 g of 10% sodium persulfate with magnetic stirring. The reactor was immersed in a constant temperature bath at 35° C. 1.3 g of sodium persulfate, 2.6 g of sodium metabisulfite and 2 g of 1% ferrous sulfate were added to the reactor and then the monomer emulsion was pumped to the reactor over two hours. The latex was stirred one more hour and 1 ml each of t-butyl hydroperoxide(10%) and sodium formaldehyde bisulfite(10%) were added twice at 20 minute intervals and stirred one more hour. The latex was cooled and filtered. Glass transition temperature was 9° C. as measured by DSC, average particle size obtained from PCS was 60 nm and % solids was 32.3%.

1. customequipped with mechanical stirrer and dry ice-acetone condenser
2. customThe system was purged with nitrogen for 30 minutes
3. customA monomer emulsion was obtained
4. customThe reactor was immersed in a constant temperature bath at 35° C
5. additionwere added twice at 20 minute intervals
6. temperatureThe latex was cooled
7. filtrationfiltered