反应详情

温度

72 °C

88 g of methyl ethyl ketone was added to a 1000 ml three-necked flask that included a stirrer and condenser and heated in a nitrogen atmosphere to 72° C., and a solution in which 0.85 g of dimethyl-2,2′-azobisisobutyrate, 50 g of phenoxyethyl methacrylate, 13 g of methacrylic acid, and 37 g of methyl methacrylate were dissolved in 50 g of methyl ethyl ketone was added dropwise thereto over three hours. After reacting for another hour after the end of the dropwise addition, a solution in which 0.42 g of dimethyl-2,2′-azobisisobutyrate was dissolved in 2 g of methyl ethyl ketone was added, heated to and maintained at 78° C. for four hours. The obtained reaction solution was reprecipitated twice in an excess amount of hexane and the precipitated resin was dried, whereby 96.5 g of a phenoxyethyl methacrylate/methyl methacrylate/methacrylic acid (copolymer ratio [mass ratio]=50/37/13) copolymer (water-insoluble resin P-1) was obtained.

1. additionwas added dropwise
2. waitAfter reacting for another hour
3. additionafter the end of the dropwise addition
4. additionwas added
5. temperatureheated to and
6. temperaturemaintained at 78° C. for four hours
7. customThe obtained reaction solution
8. customwas reprecipitated twice in an excess amount of hexane
9. customthe precipitated resin was dried