Methacryloyl chloride → Methacrylic Acid

Participants

Reaction Steps

Methacrylate (36 g) obtained by condensation of 5-norbornene-2-ol and methacrylic acid chloride and 4 g of methacrylic acid were dissolved in 360 g of methyl ethyl ketone, and the solution was heated at 70° C. Then, 0.40 g of 2,2-azobis(2,4-dimethylvaleronitrile) was added thereto, followed by heating reaction for 8 hours. After cooled to room temperature, the resulting reaction solution was slowly added dropwise to 10 liters of water, and precipitated crystals were filtered, washed and dried, thereby obtaining 18.72 g (yield: 46.8%) of a copolymer having an average molecular weight of 56,000 which is composed of 83.3 mol % of repeating unit (III-2) and 16.7 mol % of methacrylic acid.

Provenance & Evidence