Methacrylic Acid → Methyl methacrylate isobornyl methacrylate methacrylic acid

Participants

Reaction Conditions

Reaction Steps

In a 2 L three necked flask having a stirrer, a thermometer, a reflux condenser tube, and a nitrogen gas introducing pipe, 540.0 g of methyl ethyl ketone was charged, and the temperature was increased to 75° C. While maintaining the temperature in the reactor at 75° C., a mixed solution containing 108 g of methyl methacrylate, 388.8 g of isobornyl methacrylate, 43.2 g of methacrylic acid, 108 g of methyl ethyl ketone, and 2.16 g of “V-601” (trade name, manufactured by Wako Pure Chemical Inc., Ltd.) was added dropwise to the reactor at a constant speed so that the dropwise addition was completed in 2 hours. After the completion of the dropwise addition, a solution containing 1.08 g of “V-601” and 15.0 g of methyl ethyl ketone was added, and the resulting mixture was stirred at 75° C. for 2 hours. Thereafter, a solution containing 0.54 g of “V-601” and 15.0 g of methyl ethyl ketone was further added, and the resulting mixture was stirred at 75° C. for 2 hours. Thereafter, the temperature was increased to 85° C., and the mixture was continuously stirred for further 2 hours, thereby obtaining a resin solution of methyl methacrylate/isobornyl methacrylate/methacrylic acid (=20/72/8 [mass ratio]) copolymer.

Provenance & Evidence