Methacrylic Acid → HCID 18373619, compound

Participants

Reaction Conditions

Reaction Steps

88 g of methyl ethyl ketone were added to a 1000 mL three-necked flask equipped with a stirrer and a condenser tube, and heated to 72° C. under a nitrogen atmosphere. To this, a solution obtained by dissolving 0.85 g of dimethyl 2,2′-azobis(isobutyrate), 60 g of benzyl methacrylate, 10 g of methacrylic acid, and 30 g of methyl methacrylate in 50 g of methyl ethyl ketone was added dropwise over 3 hours. After the dropwise addition was completed, the mixture was allowed to react for an additional one hour, and then a solution obtained by dissolving 0.42 g of dimethyl 2,2′-azobis(isobutyrate) in 2 g of methyl ethyl ketone was added thereto. The temperature was elevated to 78° C., and the mixture was heated for 4 hours. The resulting reaction liquid was reprecipitated twice with an excess of hexane, and the separated resin was dried. In this way, 96 g of a benzyl methacrylate/methacrylic acid/methyl methacrylate copolymer (=60/10/30 [mass ratio]) as a water-insoluble polymer dispersant P-1 were obtained (see, the following formula).

Provenance & Evidence