Methacrylic Acid → Methacrylic Acid

Participants

Reaction Conditions

Reaction Steps

360.0 g of methyl ethyl ketone was placed in a 2 L three necked flask equipped with a stirrer, a thermometer, a reflux condenser tube, and a nitrogen gas introducing tube, and the temperature was raised to 75° C. Thereafter, while maintaining the temperature inside the flask at 75° C., a mixed solution containing 162.0 g of methyl methacrylate, 126.0 g of isobornylmethacrylate, 50.4 g of “PME-100” (trade name, manufactured by NOF CORPORATION, methoxypolyethyleneglycol methacrylate (n=2)), 21.6 g of methacrylic acid, 72 g of methyl ethyl ketone, and 1.44 g of V-601 (trade name, manufactured by Wako Pure Chemical Ind. Ltd.) was added dropwise at a constant rate so that the dropwise addition was completed in 2 hours. After completion of the dropping, a solution containing 0.72 g of V-601 (described above) and 36.0 g of methyl ethyl ketone was added, and stirred at 75° C. for 2 hours. Further, a solution containing 0.72 g of V-601 (described above) and 36.0 g of methyl ethyl ketone was added, and stirred at 75° C. for 2 hours. Thereafter, the temperature was raised to 85° C., and the stirring was continued for further 2 hours, thereby obtaining a resin solution of a methyl methacrylate/isobornylmethacrylate/PME-100/methacrylic acid (=45/35/14/6 [mass ratio]) copolymer.

Provenance & Evidence