Methacrylic Acid → Phenoxyethylmethacrylate methylmethacrylate methacrylic acid

Participants

Reaction Conditions

Reaction Steps

In a 1000-ml three-necked flask equipped with a stirrer and a cooling tube, 90 g of methyl ethyl ketone was added and was heated to 70° C. in a nitrogen atmosphere, and to this, a solution prepared by dissolving 0.83 g of dimethyl-2,2′-azobisisobutyrate, 70 g of phenoxyethyl methacrylate, 10 g of methacrylic acid and 20 g of methyl methacrylate in 52 g of methyl ethyl ketone was added dropwise over 3 hours. After completion of the dropwise addition, the mixture was allowed to react for another one hour, and then a solution prepared by dissolving 0.44 g of dimethyl-2,2′-azobisisobutyrate in 2 g of methyl ethyl ketone was added thereto. The temperature of the mixture was raised to 80° C., and the mixture was heated for 5 hours. The reaction solution thus obtained was reprecipitated two times in excess hexane, and a resin precipitated therefrom was dried. Thus, 93.2 g of a phenoxyethyl methacrylate/methyl methacrylate/methacrylic acid (copolymerization ratio [mass ratio]=70/20/10) copolymer (resin dispersant P-1) was obtained.

Provenance & Evidence