Methacrylic Acid → Methyl methacrylate isobornyl methacrylate methacrylic acid

Participants

Reaction Conditions

Reaction Steps

Methyl ethyl ketone (540.0 g) was placed in a 2 L-volume three-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, and a nitrogen gas introduction tube, and was heated to 75° C. Thereafter, while the temperature inside the flask was maintained at 75° C., a mixture solution of methyl methacrylate (108 g), isobornyl methacrylate (388.8 g), methacrylic acid (43.2 g), methyl ethyl ketone (108 g), and “V-601” (manufactured by Wako Pure Chemical Industries Ltd.) (2.1 g) was added dropwise into the flask (reaction container) at a constant rate such that the dropwise addition was completed in 2 hours. After the dropwise addition was completed, a solution of “V-601” (1.15 g) in methyl ethyl ketone (15.0 g) was added into the flask, and the resultant mixture in the flask stirred at 75° C. for 2 hours. A solution of “V-601” (0.54 g) in methyl ethyl ketone (15.0 g) was further added thereto, and the contents of the flask were stirred at 75° C. for 2 hours. Then, the temperature inside the flask was increased to 85° C., and stirring was continued for another 2 hours, as a result of which a resin solution of methyl methacrylate/isobornyl methacrylate/methacrylic acid (=20/72/8 [mass ratio]) copolymer was obtained.

Provenance & Evidence