反应详情

温度

75 °C

540.0 g of methyl ethyl ketone was put in a 2 L three-neck flask including a mechanical stirrer, a thermometer, a reflux cooling tube, and a nitrogen gas-introducing tube, and the temperature thereof was increased to 75° C. While the internal pressure of the reaction container was being kept at 75° C., a mixed solution including 108 g of methyl methacrylate, 388.8 g of isobornyl methacrylate, 43.2 g of methacrylic acid, 108 g of methyl ethyl ketone, and 2.1 g of “V-601” (trade name, manufactured by Wako Pure Chemical Industries, Ltd.) was added dropwise thereto such that the dropwise addition was completed in 2 hours. After the dropwise addition ended, a solution including 1.15 g of “V-601” (described above) and 15.0 g of methyl ethyl ketone was added thereto, followed by stirring for 2 hours at 75° C. In addition, a solution including 0.54 g of “V-601” (described above) and 15.0 g of methyl ethyl ketone was added thereto, followed by stirring for 2 hours at 75° C. Thereafter, the temperature thereof was increased to 85° C. to continue stirring for 2 more hours, thereby obtaining a resin solution of a methyl methacrylate/isobornyl methacrylate/methacrylic acid (=20/72/8 [mass ratio]) copolymer.

1. temperaturea thermometer, a reflux cooling tube, and a nitrogen gas-introducing tube
2. customwas being kept at 75° C.
3. additionwas added dropwise
4. additionsuch that the dropwise addition
5. additionAfter the dropwise addition
6. additionwas added
7. additionwas added
8. stirringby stirring for 2 hours at 75° C
9. temperatureThereafter, the temperature thereof was increased to 85° C.
10. stirringto continue stirring for 2 more hours