Methacrylic Acid → Phenoxyethylmethacrylate methylmethacrylate methacrylic acid

Participants

Reaction Conditions

Reaction Steps

88 g of methyl ethyl ketone was added to a 1000-mL three-necked flask equipped with an agitator and a cooling tube, and was heated to 72° C. under a nitrogen atmosphere. To this, a solution of 0.85 g of dimethyl-2,2′-azobisisobutyrate, 50 g of phenoxyethyl methacrylate, 13 g of methacrylic acid and 37 g of methyl methacrylate dissolved in 50 g of methyl ethyl ketone was added dropwise over 3 hours. After the addition was completed, the mixture was reacted for one more hour, and then a solution of 0.42 g of dimethyl-2,2′-azobisisobutyrate dissolved in 2 g of methyl ethyl ketone was added. The temperature was raised to 78° C., and the mixture was heated for 4 hours. The obtained reaction solution was precipitated two times in excess of hexane, and the precipitated resin was dried to obtain 96.5 g of a phenoxyethyl methacrylate/methyl methacrylate/methacrylic acid copolymer (copolymerization ratio by mass percent=50/37/13) (resin dispersant P-1).

Provenance & Evidence