Methacrylic Acid → Methacrylic Acid

Participants

Reaction Conditions

Reaction Steps

In a 2-liter three-neck flask equipped with a stirrer, a thermometer, a reflux condenser and a nitrogen gas introduction tube, 360.0 g of methyl ethyl ketone were placed and the temperature was increased to 75° C. A mixed solution of 162.0 g of methyl methacrylate, 126.0 g of isobornyl methacrylate, 50.4 g of PME-100 (trade name, methoxypolyethylene glycol methacrylate (n=2), available from NOF Corporation), 21.6 g of methacrylic acid, 72.0 g of methyl ethyl ketone and 1.44 g of V-601 (trade name, available from Wako Pure Chemical Industries, Ltd.) was dropped therein at a constant rate so that the dropping was completed in 2 hours. After the completion of dropping, a solution of 0.72 g of V-601 and 36.0 g of methyl ethyl ketone was further added and stirred at 75° C. for 2 hours. Then, a solution of 0.72 g of V-601 and 36.0 g of methyl ethyl ketone was further added and stirred at 75° C. for 2 hours. Subsequently, the temperature was increased to 85° C. and the mixture was stirred for another 2 hours. A resin solution of methyl methacrylate/isobornyl methacrylate/PME-100/methacrylic acid (=45/35/14/6[mass ratio]) copolymer was thus obtained.

Provenance & Evidence