Methacrylic Acid → Phenoxyethylmethacrylate methylmethacrylate methacrylic acid

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a 1,000-ml three-neck flask equipped with a stirrer and a condenser, 88 g of methyl ethyl ketone were added, and heated to 72° C. under a nitrogen atmosphere. To this flask, a solution, prepared by dissolving 0.85 g of dimethyl-2,2′-azobisisobutyrate, 50 g of phenoxyethyl methacrylate, 13 g of methacrylic acid and 37 g of methyl methacrylate in 50 g of methyl ethyl ketone, was added dropwise over 3 hours. After the completion of the dropwise addition, the content in the flask was allowed to react for an additional one hour, and a solution prepared by dissolving 0.42 g of dimethyl-2,2′-azobisisobutyrate in 2 g of methyl ethyl ketone was added thereto. The temperature of the mixture was raised to 78° C., and the mixture was heated for 4 hours. The resulting reaction solution was subjected to re-precipitation twice with an excess amount of hexane, and the precipitated resin was dried. 96.5 g of a phenoxyethyl methacrylate/methyl methacrylate/methacrylic acid copolymer (copolymerization ratio by mass %=50/37/13) was thus obtained. This copolymer is referred to as water-insoluble resin P-2.

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