Methacrylic Acid → Methacrylic acid ethylene oxide

Participants

Reaction Conditions

Reaction Steps

To a reaction vessel equipped with a stirrer and a thermometer, 683 parts of water, 11 parts of sodium salt of the sulfuric acid ester of methacrylic acid ethylene oxide adduct (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 166 parts of methacrylic acid, 110 parts of butyl acrylate, and 1 part of ammonium persulphate were poured, and stirred at 3,800 rpm for 30 minutes to obtain a white emulsion. The white emulsion was heated, the temperature in the system was raised to 75° C., and the reaction was performed for 4 hours. Next, 30 parts of an aqueous solution of 1% ammonium persulphate was further added, and the reaction mixture was matured at 75° C. for 6 hours to obtain an aqueous dispersion liquid of a vinyl resin (copolymer of methacrylic acid-butyl acrylate-sodium salt of the sulfuric acid ester of methacrylic acid ethylene oxide adduct) [particulate emulsion 1]. The volume average particle diameter of the [particulate emulsion 1] measured by means of LA-920 was 110 nm. After drying a part of [particulate emulsion 1] and isolating the resin, the glass transition temperature (Tg) of the resin was 58° C. and the weight average molecular weight was 130,000.

Provenance & Evidence