Reaktion #487491
ord-b0940d495828445aac3d2b7385a3e14e
Reaktionsgleichung
Reaktionsbedingungen
Aufarbeitung
- 1SonstigeTo a 1,000-ml three-neck flask equipped with a stirrer and a condenser
- 2SonstigeTo this flask, a solution, prepared
- 3workup.ADDITIONwas added dropwise over 3 hours
- 4workup.ADDITIONAfter the completion of the dropwise addition
- 5Sonstigeto react for an additional one hour
- 6Sonstigea solution prepared
- 7workup.ADDITIONwas added
- 8TemperaturThe temperature of the mixture was raised to 78° C.
- 9Temperaturthe mixture was heated for 4 hours
- 10SonstigeThe resulting reaction solution
- 11Sonstigewas subjected to re-precipitation twice with an excess amount of hexane
- 12Sonstigethe precipitated resin was dried
Vorschrift
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.